v1.8.0

Logtunnel

.assets/cluster-mysql.dot

@@ -0,0 +1,30 @@
+graph {
+  rankdir=LR;
+  subgraph cluster_sshportal {
+    label="sshportal cluster";
+    edge[style=dashed,color=grey,constraint=false];
+    sshportal1; sshportal2; sshportal3; sshportalN;
+    sshportal1 -- MySQL;
+    sshportal2 -- MySQL;
+    sshportal3 -- MySQL;
+    sshportalN -- MySQL;
+  }
+
+  subgraph cluster_hosts {
+    label="hosts";
+    host1; host2; host3; hostN;
+  }
+
+  subgraph cluster_users {
+    label="users";
+    user1; user2; user3; userN;
+  }
+
+  {
+    user1 -- sshportal1 -- host1[color=red,penwidth=3.0];
+    user2 -- sshportal2 -- host2[color=green,penwidth=3.0];
+    user3 -- sshportal3 -- host3[color=blue,penwidth=3.0];
+    user3 -- sshportal2 -- host1[color=purple,penwidth=3.0];
+    userN -- sshportalN -- hostN[style=dotted];
+  }
+}

.assets/cluster-mysql.svg

@@ -0,0 +1,176 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by graphviz version 2.40.1 (20161225.0304)
+ -->
+<!-- Title: %3 Pages: 1 -->
+<svg width="334pt" height="314pt"
+ viewBox="0.00 0.00 333.78 314.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 310)">
+<title>%3</title>
+<polygon fill="#ffffff" stroke="transparent" points="-4,4 -4,-310 329.7751,-310 329.7751,4 -4,4"/>
+<g id="clust1" class="cluster">
+<title>cluster_sshportal</title>
+<polygon fill="none" stroke="#000000" points="106.4533,-8 106.4533,-298 219.3045,-298 219.3045,-8 106.4533,-8"/>
+<text text-anchor="middle" x="162.8789" y="-282.8" font-family="Times,serif" font-size="14.00" fill="#000000">sshportal cluster</text>
+</g>
+<g id="clust2" class="cluster">
+<title>cluster_hosts</title>
+<polygon fill="none" stroke="#000000" points="239.3045,-62 239.3045,-298 317.7751,-298 317.7751,-62 239.3045,-62"/>
+<text text-anchor="middle" x="278.5398" y="-282.8" font-family="Times,serif" font-size="14.00" fill="#000000">hosts</text>
+</g>
+<g id="clust3" class="cluster">
+<title>cluster_users</title>
+<polygon fill="none" stroke="#000000" points="8,-62 8,-298 86.4533,-298 86.4533,-62 8,-62"/>
+<text text-anchor="middle" x="47.2266" y="-282.8" font-family="Times,serif" font-size="14.00" fill="#000000">users</text>
+</g>
+<!-- sshportal1 -->
+<g id="node1" class="node">
+<title>sshportal1</title>
+<ellipse fill="none" stroke="#000000" cx="162.8789" cy="-250" rx="46.4218" ry="18"/>
+<text text-anchor="middle" x="162.8789" y="-245.8" font-family="Times,serif" font-size="14.00" fill="#000000">sshportal1</text>
+</g>
+<!-- MySQL -->
+<g id="node5" class="node">
+<title>MySQL</title>
+<ellipse fill="none" stroke="#000000" cx="162.8789" cy="-34" rx="39.1973" ry="18"/>
+<text text-anchor="middle" x="162.8789" y="-29.8" font-family="Times,serif" font-size="14.00" fill="#000000">MySQL</text>
+</g>
+<!-- sshportal1&#45;&#45;MySQL -->
+<g id="edge1" class="edge">
+<title>sshportal1&#45;&#45;MySQL</title>
+<path fill="none" stroke="#c0c0c0" stroke-dasharray="5,2" d="M124.8869,-239.5365C113.0929,-234.0967 101.7898,-225.9823 96.4533,-214 83.4344,-184.768 83.4344,-99.232 96.4533,-70 102.3234,-56.8194 115.4132,-48.3192 128.4343,-42.9106"/>
+</g>
+<!-- host1 -->
+<g id="node6" class="node">
+<title>host1</title>
+<ellipse fill="none" stroke="#000000" cx="278.5398" cy="-250" rx="29.0429" ry="18"/>
+<text text-anchor="middle" x="278.5398" y="-245.8" font-family="Times,serif" font-size="14.00" fill="#000000">host1</text>
+</g>
+<!-- sshportal1&#45;&#45;host1 -->
+<g id="edge6" class="edge">
+<title>sshportal1&#45;&#45;host1</title>
+<path fill="none" stroke="#ff0000" stroke-width="3" d="M209.5892,-250C222.8807,-250 236.9866,-250 248.9537,-250"/>
+</g>
+<!-- sshportal2 -->
+<g id="node2" class="node">
+<title>sshportal2</title>
+<ellipse fill="none" stroke="#000000" cx="162.8789" cy="-196" rx="46.4218" ry="18"/>
+<text text-anchor="middle" x="162.8789" y="-191.8" font-family="Times,serif" font-size="14.00" fill="#000000">sshportal2</text>
+</g>
+<!-- sshportal2&#45;&#45;MySQL -->
+<g id="edge2" class="edge">
+<title>sshportal2&#45;&#45;MySQL</title>
+<path fill="none" stroke="#c0c0c0" stroke-dasharray="5,2" d="M124.8869,-185.5365C113.0929,-180.0967 101.7898,-171.9823 96.4533,-160 88.3165,-141.73 88.3165,-88.27 96.4533,-70 102.3234,-56.8194 115.4132,-48.3192 128.4343,-42.9106"/>
+</g>
+<!-- sshportal2&#45;&#45;host1 -->
+<g id="edge12" class="edge">
+<title>sshportal2&#45;&#45;host1</title>
+<path fill="none" stroke="#a020f0" stroke-width="3" d="M192.6645,-209.9063C212.0749,-218.9687 237.0472,-230.6278 255.0535,-239.0347"/>
+</g>
+<!-- host2 -->
+<g id="node7" class="node">
+<title>host2</title>
+<ellipse fill="none" stroke="#000000" cx="278.5398" cy="-196" rx="29.0429" ry="18"/>
+<text text-anchor="middle" x="278.5398" y="-191.8" font-family="Times,serif" font-size="14.00" fill="#000000">host2</text>
+</g>
+<!-- sshportal2&#45;&#45;host2 -->
+<g id="edge8" class="edge">
+<title>sshportal2&#45;&#45;host2</title>
+<path fill="none" stroke="#00ff00" stroke-width="3" d="M209.5892,-196C222.8807,-196 236.9866,-196 248.9537,-196"/>
+</g>
+<!-- sshportal3 -->
+<g id="node3" class="node">
+<title>sshportal3</title>
+<ellipse fill="none" stroke="#000000" cx="162.8789" cy="-142" rx="46.4218" ry="18"/>
+<text text-anchor="middle" x="162.8789" y="-137.8" font-family="Times,serif" font-size="14.00" fill="#000000">sshportal3</text>
+</g>
+<!-- sshportal3&#45;&#45;MySQL -->
+<g id="edge3" class="edge">
+<title>sshportal3&#45;&#45;MySQL</title>
+<path fill="none" stroke="#c0c0c0" stroke-dasharray="5,2" d="M124.8869,-131.5365C113.0929,-126.0967 101.7898,-117.9823 96.4533,-106 89.9439,-91.384 89.9439,-84.616 96.4533,-70 102.3234,-56.8194 115.4132,-48.3192 128.4343,-42.9106"/>
+</g>
+<!-- host3 -->
+<g id="node8" class="node">
+<title>host3</title>
+<ellipse fill="none" stroke="#000000" cx="278.5398" cy="-142" rx="29.0429" ry="18"/>
+<text text-anchor="middle" x="278.5398" y="-137.8" font-family="Times,serif" font-size="14.00" fill="#000000">host3</text>
+</g>
+<!-- sshportal3&#45;&#45;host3 -->
+<g id="edge10" class="edge">
+<title>sshportal3&#45;&#45;host3</title>
+<path fill="none" stroke="#0000ff" stroke-width="3" d="M209.5892,-142C222.8807,-142 236.9866,-142 248.9537,-142"/>
+</g>
+<!-- sshportalN -->
+<g id="node4" class="node">
+<title>sshportalN</title>
+<ellipse fill="none" stroke="#000000" cx="162.8789" cy="-88" rx="48.3514" ry="18"/>
+<text text-anchor="middle" x="162.8789" y="-83.8" font-family="Times,serif" font-size="14.00" fill="#000000">sshportalN</text>
+</g>
+<!-- sshportalN&#45;&#45;MySQL -->
+<g id="edge4" class="edge">
+<title>sshportalN&#45;&#45;MySQL</title>
+<path fill="none" stroke="#c0c0c0" stroke-dasharray="5,2" d="M162.8789,-69.7902C162.8789,-63.907 162.8789,-58.0238 162.8789,-52.1406"/>
+</g>
+<!-- hostN -->
+<g id="node9" class="node">
+<title>hostN</title>
+<ellipse fill="none" stroke="#000000" cx="278.5398" cy="-88" rx="31.4723" ry="18"/>
+<text text-anchor="middle" x="278.5398" y="-83.8" font-family="Times,serif" font-size="14.00" fill="#000000">hostN</text>
+</g>
+<!-- sshportalN&#45;&#45;hostN -->
+<g id="edge14" class="edge">
+<title>sshportalN&#45;&#45;hostN</title>
+<path fill="none" stroke="#000000" stroke-dasharray="1,5" d="M211.5943,-88C223.5713,-88 236.0833,-88 247.0054,-88"/>
+</g>
+<!-- user1 -->
+<g id="node10" class="node">
+<title>user1</title>
+<ellipse fill="none" stroke="#000000" cx="47.2266" cy="-250" rx="29.0257" ry="18"/>
+<text text-anchor="middle" x="47.2266" y="-245.8" font-family="Times,serif" font-size="14.00" fill="#000000">user1</text>
+</g>
+<!-- user1&#45;&#45;sshportal1 -->
+<g id="edge5" class="edge">
+<title>user1&#45;&#45;sshportal1</title>
+<path fill="none" stroke="#ff0000" stroke-width="3" d="M76.7098,-250C88.7561,-250 102.9825,-250 116.3672,-250"/>
+</g>
+<!-- user2 -->
+<g id="node11" class="node">
+<title>user2</title>
+<ellipse fill="none" stroke="#000000" cx="47.2266" cy="-196" rx="29.0257" ry="18"/>
+<text text-anchor="middle" x="47.2266" y="-191.8" font-family="Times,serif" font-size="14.00" fill="#000000">user2</text>
+</g>
+<!-- user2&#45;&#45;sshportal2 -->
+<g id="edge7" class="edge">
+<title>user2&#45;&#45;sshportal2</title>
+<path fill="none" stroke="#00ff00" stroke-width="3" d="M76.7098,-196C88.7561,-196 102.9825,-196 116.3672,-196"/>
+</g>
+<!-- user3 -->
+<g id="node12" class="node">
+<title>user3</title>
+<ellipse fill="none" stroke="#000000" cx="47.2266" cy="-142" rx="29.0257" ry="18"/>
+<text text-anchor="middle" x="47.2266" y="-137.8" font-family="Times,serif" font-size="14.00" fill="#000000">user3</text>
+</g>
+<!-- user3&#45;&#45;sshportal2 -->
+<g id="edge11" class="edge">
+<title>user3&#45;&#45;sshportal2</title>
+<path fill="none" stroke="#a020f0" stroke-width="3" d="M70.6306,-152.9277C88.5836,-161.3103 113.4965,-172.9425 132.9075,-182.0059"/>
+</g>
+<!-- user3&#45;&#45;sshportal3 -->
+<g id="edge9" class="edge">
+<title>user3&#45;&#45;sshportal3</title>
+<path fill="none" stroke="#0000ff" stroke-width="3" d="M76.7098,-142C88.7561,-142 102.9825,-142 116.3672,-142"/>
+</g>
+<!-- userN -->
+<g id="node13" class="node">
+<title>userN</title>
+<ellipse fill="none" stroke="#000000" cx="47.2266" cy="-88" rx="31.4549" ry="18"/>
+<text text-anchor="middle" x="47.2266" y="-83.8" font-family="Times,serif" font-size="14.00" fill="#000000">userN</text>
+</g>
+<!-- userN&#45;&#45;sshportalN -->
+<g id="edge13" class="edge">
+<title>userN&#45;&#45;sshportalN</title>
+<path fill="none" stroke="#000000" stroke-dasharray="1,5" d="M78.5238,-88C89.4948,-88 102.0923,-88 114.1488,-88"/>
+</g>
+</g>
+</svg>

.assets/flow-diagram.dot

@@ -0,0 +1,65 @@
+digraph {
+    rankdir=LR;
+    layout=dot;
+    node[shape=record];
+    
+    start[label="ssh sshportal";color=blue;fontcolor=blue;fontsize=20];
+    
+    subgraph cluster_sshportal {
+        graph[fontsize=20;style=dashed;color=purple;fontcolor=purple];
+        label="sshportal";
+        {
+            node[color=darkorange;fontcolor=darkorange];
+            known_user_key[label="known user key"];
+            unknown_user_key[label="unknown user key"];
+            invite_manager[label="invite manager"];
+            acl_manager[label="ACL manager"];
+        }
+        {
+            node[color=darkgreen;fontcolor=darkgreen];
+            builtin_shell[label="built-in shell"];
+            ssh_proxy[label="SSH proxy"];
+            learn_key[label="learn key"];
+        }
+        err_and_exit[label="error and exit";color=red;fontcolor=red];
+        { rank=same; ssh_proxy; builtin_shell; learn_key; err_and_exit; }
+        { rank=same; known_user_key; unknown_user_key; }
+    }
+    
+    subgraph cluster_hosts {
+        label="your hosts";
+        graph[fontsize=20;style=dashed;color=purple;fontcolor=purple];
+        node[color=blue;fontcolor=blue];
+        
+        host_1[label="root@host1"];
+        host_2[label="user@host2:2222"];
+        host_3[label="root@host3:1234"];
+    }
+    
+    {
+        edge[color=blue];
+        start -> known_user_key;
+        start -> unknown_user_key;
+        ssh_proxy -> host_1;
+        ssh_proxy -> host_2;
+        ssh_proxy -> host_3;
+    }
+    {
+        edge[color=darkgreen;fontcolor=darkgreen];
+        known_user_key -> builtin_shell[label="user=admin"];
+        acl_manager -> ssh_proxy[label="authorized"];
+        invite_manager -> learn_key[label="valid token"];
+    }
+    {
+        edge[color=darkorange;fontcolor=darkorange];
+        known_user_key -> acl_manager[label="user matches an existing host"];
+        unknown_user_key -> invite_manager[headlabel="user=invite:<token>"];
+    }
+    {
+        edge[color=red;fontcolor=red];
+        known_user_key -> err_and_exit[label="invalid user"];
+        acl_manager -> err_and_exit[label="unauthorized"];
+        unknown_user_key -> err_and_exit[label="any other user"];
+        invite_manager -> err_and_exit[label="invalid token"];
+    }
+}

.assets/flow-diagram.svg

@@ -0,0 +1,188 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by graphviz version 2.40.1 (20161225.0304)
+ -->
+<!-- Title: %3 Pages: 1 -->
+<svg width="1026pt" height="312pt"
+ viewBox="0.00 0.00 1026.42 312.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 308)">
+<title>%3</title>
+<polygon fill="#ffffff" stroke="transparent" points="-4,4 -4,-308 1022.4219,-308 1022.4219,4 -4,4"/>
+<g id="clust1" class="cluster">
+<title>cluster_sshportal</title>
+<polygon fill="none" stroke="#a020f0" stroke-dasharray="5,2" points="147.7832,-8 147.7832,-296 858.9775,-296 858.9775,-8 147.7832,-8"/>
+<text text-anchor="middle" x="503.3804" y="-276" font-family="Times,serif" font-size="20.00" fill="#a020f0">sshportal</text>
+</g>
+<g id="clust6" class="cluster">
+<title>cluster_hosts</title>
+<polygon fill="none" stroke="#a020f0" stroke-dasharray="5,2" points="879.9775,-104 879.9775,-296 1010.4219,-296 1010.4219,-104 879.9775,-104"/>
+<text text-anchor="middle" x="945.1997" y="-276" font-family="Times,serif" font-size="20.00" fill="#a020f0">your hosts</text>
+</g>
+<!-- start -->
+<g id="node1" class="node">
+<title>start</title>
+<polygon fill="none" stroke="#0000ff" points="0,-118 0,-154 118.7832,-154 118.7832,-118 0,-118"/>
+<text text-anchor="middle" x="59.3916" y="-130" font-family="Times,serif" font-size="20.00" fill="#0000ff">ssh sshportal</text>
+</g>
+<!-- known_user_key -->
+<g id="node2" class="node">
+<title>known_user_key</title>
+<polygon fill="none" stroke="#ff8c00" points="162.7832,-157 162.7832,-193 267.4316,-193 267.4316,-157 162.7832,-157"/>
+<text text-anchor="middle" x="215.1074" y="-170.8" font-family="Times,serif" font-size="14.00" fill="#ff8c00">known user key</text>
+</g>
+<!-- start&#45;&gt;known_user_key -->
+<g id="edge1" class="edge">
+<title>start&#45;&gt;known_user_key</title>
+<path fill="none" stroke="#0000ff" d="M119.1501,-150.9669C130.1162,-153.7134 141.5894,-156.587 152.6326,-159.3528"/>
+<polygon fill="#0000ff" stroke="#0000ff" points="152.0758,-162.8214 162.6266,-161.8558 153.7765,-156.0311 152.0758,-162.8214"/>
+</g>
+<!-- unknown_user_key -->
+<g id="node3" class="node">
+<title>unknown_user_key</title>
+<polygon fill="none" stroke="#ff8c00" points="155.7832,-72 155.7832,-108 274.4316,-108 274.4316,-72 155.7832,-72"/>
+<text text-anchor="middle" x="215.1074" y="-85.8" font-family="Times,serif" font-size="14.00" fill="#ff8c00">unknown user key</text>
+</g>
+<!-- start&#45;&gt;unknown_user_key -->
+<g id="edge2" class="edge">
+<title>start&#45;&gt;unknown_user_key</title>
+<path fill="none" stroke="#0000ff" d="M119.1501,-118.3468C127.968,-115.7419 137.1138,-113.0401 146.1003,-110.3854"/>
+<polygon fill="#0000ff" stroke="#0000ff" points="147.1673,-113.7198 155.766,-107.5301 145.1841,-107.0066 147.1673,-113.7198"/>
+</g>
+<!-- acl_manager -->
+<g id="node5" class="node">
+<title>acl_manager</title>
+<polygon fill="none" stroke="#ff8c00" points="514.7056,-173 514.7056,-209 609.8862,-209 609.8862,-173 514.7056,-173"/>
+<text text-anchor="middle" x="562.2959" y="-186.8" font-family="Times,serif" font-size="14.00" fill="#ff8c00">ACL manager</text>
+</g>
+<!-- known_user_key&#45;&gt;acl_manager -->
+<g id="edge9" class="edge">
+<title>known_user_key&#45;&gt;acl_manager</title>
+<path fill="none" stroke="#ff8c00" d="M267.461,-177.4127C331.1153,-180.3462 438.21,-185.2816 504.3082,-188.3277"/>
+<polygon fill="#ff8c00" stroke="#ff8c00" points="504.401,-191.8356 514.5516,-188.7997 504.7233,-184.843 504.401,-191.8356"/>
+<text text-anchor="middle" x="393.4697" y="-188.8" font-family="Times,serif" font-size="14.00" fill="#ff8c00">user matches an existing host</text>
+</g>
+<!-- builtin_shell -->
+<g id="node6" class="node">
+<title>builtin_shell</title>
+<polygon fill="none" stroke="#006400" points="761.6929,-223 761.6929,-259 848.855,-259 848.855,-223 761.6929,-223"/>
+<text text-anchor="middle" x="805.2739" y="-236.8" font-family="Times,serif" font-size="14.00" fill="#006400">built&#45;in shell</text>
+</g>
+<!-- known_user_key&#45;&gt;builtin_shell -->
+<g id="edge6" class="edge">
+<title>known_user_key&#45;&gt;builtin_shell</title>
+<path fill="none" stroke="#006400" d="M267.592,-193.0548C281.6792,-197.2785 297.0081,-201.3215 311.4316,-204 469.5409,-233.361 660.2348,-239.5693 751.4965,-240.7835"/>
+<polygon fill="#006400" stroke="#006400" points="751.5568,-244.2844 761.5974,-240.9027 751.6394,-237.2848 751.5568,-244.2844"/>
+<text text-anchor="middle" x="562.2959" y="-238.8" font-family="Times,serif" font-size="14.00" fill="#006400">user=admin</text>
+</g>
+<!-- err_and_exit -->
+<g id="node9" class="node">
+<title>err_and_exit</title>
+<polygon fill="none" stroke="#ff0000" points="759.5703,-106 759.5703,-142 850.9775,-142 850.9775,-106 759.5703,-106"/>
+<text text-anchor="middle" x="805.2739" y="-119.8" font-family="Times,serif" font-size="14.00" fill="#ff0000">error and exit</text>
+</g>
+<!-- known_user_key&#45;&gt;err_and_exit -->
+<g id="edge11" class="edge">
+<title>known_user_key&#45;&gt;err_and_exit</title>
+<path fill="none" stroke="#ff0000" d="M267.4808,-170.4741C378.1362,-160.9117 634.8943,-138.7236 748.9418,-128.868"/>
+<polygon fill="#ff0000" stroke="#ff0000" points="749.5354,-132.3298 759.1969,-127.9818 748.9327,-125.3558 749.5354,-132.3298"/>
+<text text-anchor="middle" x="562.2959" y="-151.8" font-family="Times,serif" font-size="14.00" fill="#ff0000">invalid user</text>
+</g>
+<!-- invite_manager -->
+<g id="node4" class="node">
+<title>invite_manager</title>
+<polygon fill="none" stroke="#ff8c00" points="512.5078,-17 512.5078,-53 612.084,-53 612.084,-17 512.5078,-17"/>
+<text text-anchor="middle" x="562.2959" y="-30.8" font-family="Times,serif" font-size="14.00" fill="#ff8c00">invite manager</text>
+</g>
+<!-- unknown_user_key&#45;&gt;invite_manager -->
+<g id="edge10" class="edge">
+<title>unknown_user_key&#45;&gt;invite_manager</title>
+<path fill="none" stroke="#ff8c00" d="M274.7912,-80.5452C338.467,-70.4579 438.7527,-54.5711 502.4793,-44.4759"/>
+<polygon fill="#ff8c00" stroke="#ff8c00" points="503.0528,-47.9288 512.382,-42.9071 501.9575,-41.015 503.0528,-47.9288"/>
+<text text-anchor="middle" x="455.4386" y="-31.7071" font-family="Times,serif" font-size="14.00" fill="#ff8c00">user=invite:&lt;token&gt;</text>
+</g>
+<!-- unknown_user_key&#45;&gt;err_and_exit -->
+<g id="edge13" class="edge">
+<title>unknown_user_key&#45;&gt;err_and_exit</title>
+<path fill="none" stroke="#ff0000" d="M274.4978,-89.2935C352.2933,-89.0083 492.8294,-90.6942 612.084,-104 628.7169,-105.8558 632.5001,-108.7473 649.084,-111 682.1267,-115.4884 719.327,-118.6586 749.132,-120.7442"/>
+<polygon fill="#ff0000" stroke="#ff0000" points="749.133,-124.2522 759.347,-121.437 749.6068,-117.2683 749.133,-124.2522"/>
+<text text-anchor="middle" x="562.2959" y="-106.8" font-family="Times,serif" font-size="14.00" fill="#ff0000">any other user</text>
+</g>
+<!-- learn_key -->
+<g id="node8" class="node">
+<title>learn_key</title>
+<polygon fill="none" stroke="#006400" points="771.4272,-17 771.4272,-53 839.1206,-53 839.1206,-17 771.4272,-17"/>
+<text text-anchor="middle" x="805.2739" y="-30.8" font-family="Times,serif" font-size="14.00" fill="#006400">learn key</text>
+</g>
+<!-- invite_manager&#45;&gt;learn_key -->
+<g id="edge8" class="edge">
+<title>invite_manager&#45;&gt;learn_key</title>
+<path fill="none" stroke="#006400" d="M612.3465,-35C656.1463,-35 719.1598,-35 761.1155,-35"/>
+<polygon fill="#006400" stroke="#006400" points="761.3041,-38.5001 771.3041,-35 761.304,-31.5001 761.3041,-38.5001"/>
+<text text-anchor="middle" x="685.8271" y="-37.8" font-family="Times,serif" font-size="14.00" fill="#006400">valid token</text>
+</g>
+<!-- invite_manager&#45;&gt;err_and_exit -->
+<g id="edge14" class="edge">
+<title>invite_manager&#45;&gt;err_and_exit</title>
+<path fill="none" stroke="#ff0000" d="M611.4661,-53.0105C651.6045,-67.7127 708.3017,-88.4802 750.0066,-103.7562"/>
+<polygon fill="#ff0000" stroke="#ff0000" points="748.8708,-107.0676 759.4646,-107.2206 751.2785,-100.4946 748.8708,-107.0676"/>
+<text text-anchor="middle" x="685.8271" y="-95.8" font-family="Times,serif" font-size="14.00" fill="#ff0000">invalid token</text>
+</g>
+<!-- ssh_proxy -->
+<g id="node7" class="node">
+<title>ssh_proxy</title>
+<polygon fill="none" stroke="#006400" points="766.3516,-168 766.3516,-204 844.1963,-204 844.1963,-168 766.3516,-168"/>
+<text text-anchor="middle" x="805.2739" y="-181.8" font-family="Times,serif" font-size="14.00" fill="#006400">SSH proxy</text>
+</g>
+<!-- acl_manager&#45;&gt;ssh_proxy -->
+<g id="edge7" class="edge">
+<title>acl_manager&#45;&gt;ssh_proxy</title>
+<path fill="none" stroke="#006400" d="M610.0008,-192.3563C641.8818,-193.0022 684.7518,-193.37 722.5703,-192 733.3636,-191.609 744.9337,-190.9319 755.8983,-190.1699"/>
+<polygon fill="#006400" stroke="#006400" points="756.4612,-193.6382 766.18,-189.4199 755.9519,-186.6568 756.4612,-193.6382"/>
+<text text-anchor="middle" x="685.8271" y="-194.8" font-family="Times,serif" font-size="14.00" fill="#006400">authorized</text>
+</g>
+<!-- acl_manager&#45;&gt;err_and_exit -->
+<g id="edge12" class="edge">
+<title>acl_manager&#45;&gt;err_and_exit</title>
+<path fill="none" stroke="#ff0000" d="M610.264,-178.009C646.3866,-168.197 697.1155,-154.3556 741.5703,-142 744.1794,-141.2748 746.8478,-140.5307 749.5426,-139.7772"/>
+<polygon fill="#ff0000" stroke="#ff0000" points="750.6733,-143.0952 759.3567,-137.025 748.7831,-136.3552 750.6733,-143.0952"/>
+<text text-anchor="middle" x="685.8271" y="-169.8" font-family="Times,serif" font-size="14.00" fill="#ff0000">unauthorized</text>
+</g>
+<!-- host_1 -->
+<g id="node10" class="node">
+<title>host_1</title>
+<polygon fill="none" stroke="#0000ff" points="904.3086,-223 904.3086,-259 986.0908,-259 986.0908,-223 904.3086,-223"/>
+<text text-anchor="middle" x="945.1997" y="-236.8" font-family="Times,serif" font-size="14.00" fill="#0000ff">root@host1</text>
+</g>
+<!-- ssh_proxy&#45;&gt;host_1 -->
+<g id="edge3" class="edge">
+<title>ssh_proxy&#45;&gt;host_1</title>
+<path fill="none" stroke="#0000ff" d="M844.2511,-201.3206C859.7986,-207.4318 877.9046,-214.5486 894.4551,-221.054"/>
+<polygon fill="#0000ff" stroke="#0000ff" points="893.4017,-224.4006 903.9889,-224.8015 895.9624,-217.8858 893.4017,-224.4006"/>
+</g>
+<!-- host_2 -->
+<g id="node11" class="node">
+<title>host_2</title>
+<polygon fill="none" stroke="#0000ff" points="887.9775,-168 887.9775,-204 1002.4219,-204 1002.4219,-168 887.9775,-168"/>
+<text text-anchor="middle" x="945.1997" y="-181.8" font-family="Times,serif" font-size="14.00" fill="#0000ff">user@host2:2222</text>
+</g>
+<!-- ssh_proxy&#45;&gt;host_2 -->
+<g id="edge4" class="edge">
+<title>ssh_proxy&#45;&gt;host_2</title>
+<path fill="none" stroke="#0000ff" d="M844.2511,-186C854.6959,-186 866.2954,-186 877.8023,-186"/>
+<polygon fill="#0000ff" stroke="#0000ff" points="877.8592,-189.5001 887.8591,-186 877.8591,-182.5001 877.8592,-189.5001"/>
+</g>
+<!-- host_3 -->
+<g id="node12" class="node">
+<title>host_3</title>
+<polygon fill="none" stroke="#0000ff" points="888.3638,-113 888.3638,-149 1002.0356,-149 1002.0356,-113 888.3638,-113"/>
+<text text-anchor="middle" x="945.1997" y="-126.8" font-family="Times,serif" font-size="14.00" fill="#0000ff">root@host3:1234</text>
+</g>
+<!-- ssh_proxy&#45;&gt;host_3 -->
+<g id="edge5" class="edge">
+<title>ssh_proxy&#45;&gt;host_3</title>
+<path fill="none" stroke="#0000ff" d="M844.2511,-170.6794C858.381,-165.1255 874.624,-158.7409 889.8921,-152.7395"/>
+<polygon fill="#0000ff" stroke="#0000ff" points="891.2185,-155.9789 899.245,-149.0632 888.6578,-149.4641 891.2185,-155.9789"/>
+</g>
+</g>
+</svg>

.assets/overview.dot

@@ -0,0 +1,36 @@
+graph {
+  rankdir=LR;
+  node[shape=box,style=rounded,style=rounded,fillcolor=gray];
+
+
+  subgraph cluster_sshportal {
+      sshportal[penwidth=3.0,color=brown,fontcolor=brown,fontsize=20];
+      shell[label="built-in\nadmin shell",color=orange,fontcolor=orange];
+      db[color=gray,fontcolor=gray,shape=circle];
+      { rank=same; db; sshportal; shell }
+  }
+
+  {
+      node[color="green"];
+      host1; host2; host3; hostN;
+  }
+
+  {
+      node[color="blue"];
+      user1; user2; user3; userN;
+  }
+
+  {
+      edge[penwidth=3.0];
+      user1 -- sshportal -- host1[color=red];
+      user2 -- sshportal -- host2[color=blue];
+      user3 -- sshportal -- host1[color=purple];
+      user2 -- sshportal -- host3[color=green];
+      user2 -- sshportal -- shell[color=orange,constraint=false];
+  }
+
+  userN -- sshportal[style=dotted];
+  sshportal -- hostN[style=dotted];
+  sshportal -- db[style=dotted,color=grey];
+
+}

.assets/overview.svg

@@ -0,0 +1,149 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by graphviz version 2.40.1 (20161225.0304)
+ -->
+<!-- Title: %3 Pages: 1 -->
+<svg width="276pt" height="224pt"
+ viewBox="0.00 0.00 276.22 224.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 220)">
+<title>%3</title>
+<polygon fill="#ffffff" stroke="transparent" points="-4,4 -4,-220 272.2168,-220 272.2168,4 -4,4"/>
+<g id="clust1" class="cluster">
+<title>cluster_sshportal</title>
+<polygon fill="none" stroke="#000000" points="82,-46 82,-208 186.2168,-208 186.2168,-46 82,-46"/>
+</g>
+<!-- sshportal -->
+<g id="node1" class="node">
+<title>sshportal</title>
+<path fill="none" stroke="#a52a2a" stroke-width="3" d="M166.3255,-144C166.3255,-144 101.8913,-144 101.8913,-144 95.8913,-144 89.8913,-138 89.8913,-132 89.8913,-132 89.8913,-120 89.8913,-120 89.8913,-114 95.8913,-108 101.8913,-108 101.8913,-108 166.3255,-108 166.3255,-108 172.3255,-108 178.3255,-114 178.3255,-120 178.3255,-120 178.3255,-132 178.3255,-132 178.3255,-138 172.3255,-144 166.3255,-144"/>
+<text text-anchor="middle" x="134.1084" y="-120" font-family="Times,serif" font-size="20.00" fill="#a52a2a">sshportal</text>
+</g>
+<!-- shell -->
+<g id="node2" class="node">
+<title>shell</title>
+<path fill="none" stroke="#ffa500" d="M162.543,-90C162.543,-90 105.6738,-90 105.6738,-90 99.6738,-90 93.6738,-84 93.6738,-78 93.6738,-78 93.6738,-66 93.6738,-66 93.6738,-60 99.6738,-54 105.6738,-54 105.6738,-54 162.543,-54 162.543,-54 168.543,-54 174.543,-60 174.543,-66 174.543,-66 174.543,-78 174.543,-78 174.543,-84 168.543,-90 162.543,-90"/>
+<text text-anchor="middle" x="134.1084" y="-74.8" font-family="Times,serif" font-size="14.00" fill="#ffa500">built&#45;in</text>
+<text text-anchor="middle" x="134.1084" y="-60.8" font-family="Times,serif" font-size="14.00" fill="#ffa500">admin shell</text>
+</g>
+<!-- sshportal&#45;&#45;shell -->
+<g id="edge10" class="edge">
+<title>sshportal&#45;&#45;shell</title>
+<path fill="none" stroke="#ffa500" stroke-width="3" d="M134.1084,-107.7902C134.1084,-101.907 134.1084,-96.0238 134.1084,-90.1406"/>
+</g>
+<!-- db -->
+<g id="node3" class="node">
+<title>db</title>
+<ellipse fill="none" stroke="#c0c0c0" cx="134.1084" cy="-181" rx="18.9007" ry="18.9007"/>
+<text text-anchor="middle" x="134.1084" y="-176.8" font-family="Times,serif" font-size="14.00" fill="#c0c0c0">db</text>
+</g>
+<!-- sshportal&#45;&#45;db -->
+<g id="edge13" class="edge">
+<title>sshportal&#45;&#45;db</title>
+<path fill="none" stroke="#c0c0c0" stroke-dasharray="1,5" d="M134.1084,-144.0469C134.1084,-150.0133 134.1084,-155.9797 134.1084,-161.946"/>
+</g>
+<!-- host1 -->
+<g id="node4" class="node">
+<title>host1</title>
+<path fill="none" stroke="#00ff00" d="M256.2168,-198C256.2168,-198 226.2168,-198 226.2168,-198 220.2168,-198 214.2168,-192 214.2168,-186 214.2168,-186 214.2168,-174 214.2168,-174 214.2168,-168 220.2168,-162 226.2168,-162 226.2168,-162 256.2168,-162 256.2168,-162 262.2168,-162 268.2168,-168 268.2168,-174 268.2168,-174 268.2168,-186 268.2168,-186 268.2168,-192 262.2168,-198 256.2168,-198"/>
+<text text-anchor="middle" x="241.2168" y="-175.8" font-family="Times,serif" font-size="14.00" fill="#000000">host1</text>
+</g>
+<!-- sshportal&#45;&#45;host1 -->
+<g id="edge2" class="edge">
+<title>sshportal&#45;&#45;host1</title>
+<path fill="none" stroke="#ff0000" stroke-width="3" d="M178.2919,-141.6183C191.4305,-147.98 205.3457,-155.29 216.7405,-161.8863"/>
+</g>
+<!-- sshportal&#45;&#45;host1 -->
+<g id="edge6" class="edge">
+<title>sshportal&#45;&#45;host1</title>
+<path fill="none" stroke="#a020f0" stroke-width="3" d="M158.413,-144.0143C174.9543,-153.6007 196.8661,-164.7159 213.9941,-172.2404"/>
+</g>
+<!-- host2 -->
+<g id="node5" class="node">
+<title>host2</title>
+<path fill="none" stroke="#00ff00" d="M256.2168,-144C256.2168,-144 226.2168,-144 226.2168,-144 220.2168,-144 214.2168,-138 214.2168,-132 214.2168,-132 214.2168,-120 214.2168,-120 214.2168,-114 220.2168,-108 226.2168,-108 226.2168,-108 256.2168,-108 256.2168,-108 262.2168,-108 268.2168,-114 268.2168,-120 268.2168,-120 268.2168,-132 268.2168,-132 268.2168,-138 262.2168,-144 256.2168,-144"/>
+<text text-anchor="middle" x="241.2168" y="-121.8" font-family="Times,serif" font-size="14.00" fill="#000000">host2</text>
+</g>
+<!-- sshportal&#45;&#45;host2 -->
+<g id="edge4" class="edge">
+<title>sshportal&#45;&#45;host2</title>
+<path fill="none" stroke="#0000ff" stroke-width="3" d="M178.2919,-126C190.3932,-126 203.1534,-126 213.9962,-126"/>
+</g>
+<!-- host3 -->
+<g id="node6" class="node">
+<title>host3</title>
+<path fill="none" stroke="#00ff00" d="M256.2168,-90C256.2168,-90 226.2168,-90 226.2168,-90 220.2168,-90 214.2168,-84 214.2168,-78 214.2168,-78 214.2168,-66 214.2168,-66 214.2168,-60 220.2168,-54 226.2168,-54 226.2168,-54 256.2168,-54 256.2168,-54 262.2168,-54 268.2168,-60 268.2168,-66 268.2168,-66 268.2168,-78 268.2168,-78 268.2168,-84 262.2168,-90 256.2168,-90"/>
+<text text-anchor="middle" x="241.2168" y="-67.8" font-family="Times,serif" font-size="14.00" fill="#000000">host3</text>
+</g>
+<!-- sshportal&#45;&#45;host3 -->
+<g id="edge8" class="edge">
+<title>sshportal&#45;&#45;host3</title>
+<path fill="none" stroke="#00ff00" stroke-width="3" d="M170.0719,-107.8686C184.4145,-100.6376 200.6507,-92.4519 213.9876,-85.728"/>
+</g>
+<!-- hostN -->
+<g id="node7" class="node">
+<title>hostN</title>
+<path fill="none" stroke="#00ff00" d="M256.2168,-36C256.2168,-36 226.2168,-36 226.2168,-36 220.2168,-36 214.2168,-30 214.2168,-24 214.2168,-24 214.2168,-12 214.2168,-12 214.2168,-6 220.2168,0 226.2168,0 226.2168,0 256.2168,0 256.2168,0 262.2168,0 268.2168,-6 268.2168,-12 268.2168,-12 268.2168,-24 268.2168,-24 268.2168,-30 262.2168,-36 256.2168,-36"/>
+<text text-anchor="middle" x="241.2168" y="-13.8" font-family="Times,serif" font-size="14.00" fill="#000000">hostN</text>
+</g>
+<!-- sshportal&#45;&#45;hostN -->
+<g id="edge12" class="edge">
+<title>sshportal&#45;&#45;hostN</title>
+<path fill="none" stroke="#000000" stroke-dasharray="1,5" d="M175.0827,-107.9914C179.0963,-105.3082 182.9022,-102.3137 186.2168,-99 205.3358,-79.8865 198.2486,-66.8147 214.2168,-45 216.4095,-42.0045 218.9349,-39.0275 221.5425,-36.2043"/>
+</g>
+<!-- user1 -->
+<g id="node8" class="node">
+<title>user1</title>
+<path fill="none" stroke="#0000ff" d="M42,-198C42,-198 12,-198 12,-198 6,-198 0,-192 0,-186 0,-186 0,-174 0,-174 0,-168 6,-162 12,-162 12,-162 42,-162 42,-162 48,-162 54,-168 54,-174 54,-174 54,-186 54,-186 54,-192 48,-198 42,-198"/>
+<text text-anchor="middle" x="27" y="-175.8" font-family="Times,serif" font-size="14.00" fill="#000000">user1</text>
+</g>
+<!-- user1&#45;&#45;sshportal -->
+<g id="edge1" class="edge">
+<title>user1&#45;&#45;sshportal</title>
+<path fill="none" stroke="#ff0000" stroke-width="3" d="M54.028,-166.3735C67.4141,-159.6248 83.7582,-151.3846 98.1822,-144.1126"/>
+</g>
+<!-- user2 -->
+<g id="node9" class="node">
+<title>user2</title>
+<path fill="none" stroke="#0000ff" d="M42,-144C42,-144 12,-144 12,-144 6,-144 0,-138 0,-132 0,-132 0,-120 0,-120 0,-114 6,-108 12,-108 12,-108 42,-108 42,-108 48,-108 54,-114 54,-120 54,-120 54,-132 54,-132 54,-138 48,-144 42,-144"/>
+<text text-anchor="middle" x="27" y="-121.8" font-family="Times,serif" font-size="14.00" fill="#000000">user2</text>
+</g>
+<!-- user2&#45;&#45;sshportal -->
+<g id="edge3" class="edge">
+<title>user2&#45;&#45;sshportal</title>
+<path fill="none" stroke="#0000ff" stroke-width="3" d="M54.028,-114.0952C64.8112,-112.6824 77.514,-112.208 89.5863,-112.6721"/>
+</g>
+<!-- user2&#45;&#45;sshportal -->
+<g id="edge7" class="edge">
+<title>user2&#45;&#45;sshportal</title>
+<path fill="none" stroke="#00ff00" stroke-width="3" d="M54.028,-126C64.8112,-126 77.514,-126 89.5863,-126"/>
+</g>
+<!-- user2&#45;&#45;sshportal -->
+<g id="edge9" class="edge">
+<title>user2&#45;&#45;sshportal</title>
+<path fill="none" stroke="#ffa500" stroke-width="3" d="M54.028,-137.9048C64.8112,-139.3176 77.514,-139.792 89.5863,-139.3279"/>
+</g>
+<!-- user3 -->
+<g id="node10" class="node">
+<title>user3</title>
+<path fill="none" stroke="#0000ff" d="M42,-90C42,-90 12,-90 12,-90 6,-90 0,-84 0,-78 0,-78 0,-66 0,-66 0,-60 6,-54 12,-54 12,-54 42,-54 42,-54 48,-54 54,-60 54,-66 54,-66 54,-78 54,-78 54,-84 48,-90 42,-90"/>
+<text text-anchor="middle" x="27" y="-67.8" font-family="Times,serif" font-size="14.00" fill="#000000">user3</text>
+</g>
+<!-- user3&#45;&#45;sshportal -->
+<g id="edge5" class="edge">
+<title>user3&#45;&#45;sshportal</title>
+<path fill="none" stroke="#a020f0" stroke-width="3" d="M54.028,-85.6265C67.4141,-92.3752 83.7582,-100.6154 98.1822,-107.8874"/>
+</g>
+<!-- userN -->
+<g id="node11" class="node">
+<title>userN</title>
+<path fill="none" stroke="#0000ff" d="M42,-36C42,-36 12,-36 12,-36 6,-36 0,-30 0,-24 0,-24 0,-12 0,-12 0,-6 6,0 12,0 12,0 42,0 42,0 48,0 54,-6 54,-12 54,-12 54,-24 54,-24 54,-30 48,-36 42,-36"/>
+<text text-anchor="middle" x="27" y="-13.8" font-family="Times,serif" font-size="14.00" fill="#000000">userN</text>
+</g>
+<!-- userN&#45;&#45;sshportal -->
+<g id="edge11" class="edge">
+<title>userN&#45;&#45;sshportal</title>
+<path fill="none" stroke="#000000" stroke-dasharray="1,5" d="M46.6743,-36.2043C49.2819,-39.0275 51.8073,-42.0045 54,-45 69.9682,-66.8147 62.881,-79.8865 82,-99 85.3146,-102.3137 89.1205,-105.3082 93.1341,-107.9914"/>
+</g>
+</g>
+</svg>

.assets/sql-schema.svg

@@ -0,0 +1,390 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by graphviz version 2.40.1 (20161225.0304)
+ -->
+<!-- Title: Database Structure Pages: 1 -->
+<svg width="1498pt" height="1073pt"
+ viewBox="0.00 0.00 1498.00 1073.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 1069)">
+<title>Database Structure</title>
+<polygon fill="#ffffff" stroke="transparent" points="-4,4 -4,-1069 1494,-1069 1494,4 -4,4"/>
+<text text-anchor="middle" x="745" y="-1049.8" font-family="Helvetica,sans-Serif" font-size="14.00" fill="#000000">ER Diagram: db</text>
+<!-- acls -->
+<g id="node1" class="node">
+<title>acls</title>
+<polygon fill="#dddddd" stroke="transparent" points="700,-556 700,-576 828,-576 828,-556 700,-556"/>
+<polygon fill="none" stroke="#000000" points="700,-556 700,-576 828,-576 828,-556 700,-556"/>
+<text text-anchor="start" x="753.1172" y="-561.8" font-family="Times,serif" font-size="14.00" fill="#000000">acls</text>
+<polygon fill="none" stroke="#000000" points="700,-536 700,-556 828,-556 828,-536 700,-536"/>
+<text text-anchor="start" x="748.5562" y="-542.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="763.3354" y="-542.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="700,-516 700,-536 828,-536 828,-516 700,-516"/>
+<text text-anchor="start" x="704.501" y="-522.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="765.9014" y="-522.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-496 700,-516 828,-516 828,-496 700,-496"/>
+<text text-anchor="start" x="702.5459" y="-502.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
+<text text-anchor="start" x="767.8564" y="-502.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-476 700,-496 828,-496 828,-476 700,-476"/>
+<text text-anchor="start" x="704.4941" y="-482.8" font-family="Times,serif" font-size="14.00" fill="#000000">deleted_at:</text>
+<text text-anchor="start" x="765.9082" y="-482.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-456 700,-476 828,-476 828,-456 700,-456"/>
+<text text-anchor="start" x="703.3721" y="-462.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_pattern:</text>
+<text text-anchor="start" x="776.4688" y="-462.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-436 700,-456 828,-456 828,-436 700,-436"/>
+<text text-anchor="start" x="720.8721" y="-442.8" font-family="Times,serif" font-size="14.00" fill="#000000">action:</text>
+<text text-anchor="start" x="758.9688" y="-442.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-416 700,-436 828,-436 828,-416 700,-416"/>
+<text text-anchor="start" x="734.9492" y="-422.8" font-family="Times,serif" font-size="14.00" fill="#000000">weight:</text>
+<text text-anchor="start" x="776.9424" y="-422.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="700,-396 700,-416 828,-416 828,-396 700,-396"/>
+<text text-anchor="start" x="711.9272" y="-402.8" font-family="Times,serif" font-size="14.00" fill="#000000">comment:</text>
+<text text-anchor="start" x="767.9136" y="-402.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- host_group_acls -->
+<g id="node2" class="node">
+<title>host_group_acls</title>
+<polygon fill="#dddddd" stroke="transparent" points="137,-673 137,-693 243,-693 243,-673 137,-673"/>
+<polygon fill="none" stroke="#000000" points="137,-673 137,-693 243,-693 243,-673 137,-673"/>
+<text text-anchor="start" x="144.1172" y="-678.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_group_acls</text>
+<polygon fill="none" stroke="#000000" points="137,-653 137,-673 243,-673 243,-653 137,-653"/>
+<text text-anchor="start" x="139.5562" y="-659.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_group_id:</text>
+<text text-anchor="start" x="224.3354" y="-659.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="137,-633 137,-653 243,-653 243,-633 137,-633"/>
+<text text-anchor="start" x="162.8975" y="-639.8" font-family="Times,serif" font-size="14.00" fill="#000000">acl_id:</text>
+<text text-anchor="start" x="200.9941" y="-639.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+</g>
+<!-- host_group_acls&#45;&gt;acls -->
+<g id="edge1" class="edge">
+<title>host_group_acls:acl_id&#45;&gt;acls:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-643C447.1889,-643 490.9328,-549.194 689.7944,-546.0793"/>
+<polygon fill="#444444" stroke="#444444" points="700.0272,-549.4999 690.0003,-546.0778 699.9728,-542.5001 700.0272,-549.4999"/>
+</g>
+<!-- host_groups -->
+<g id="node3" class="node">
+<title>host_groups</title>
+<polygon fill="#dddddd" stroke="transparent" points="700,-722 700,-742 828,-742 828,-722 700,-722"/>
+<polygon fill="none" stroke="#000000" points="700,-722 700,-742 828,-742 828,-722 700,-722"/>
+<text text-anchor="start" x="729.7759" y="-727.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_groups</text>
+<polygon fill="none" stroke="#000000" points="700,-702 700,-722 828,-722 828,-702 700,-702"/>
+<text text-anchor="start" x="748.5562" y="-708.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="763.3354" y="-708.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="700,-682 700,-702 828,-702 828,-682 700,-682"/>
+<text text-anchor="start" x="704.501" y="-688.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="765.9014" y="-688.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-662 700,-682 828,-682 828,-662 700,-662"/>
+<text text-anchor="start" x="702.5459" y="-668.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
+<text text-anchor="start" x="767.8564" y="-668.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-642 700,-662 828,-662 828,-642 700,-642"/>
+<text text-anchor="start" x="704.4941" y="-648.8" font-family="Times,serif" font-size="14.00" fill="#000000">deleted_at:</text>
+<text text-anchor="start" x="765.9082" y="-648.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-622 700,-642 828,-642 828,-622 700,-622"/>
+<text text-anchor="start" x="722.8169" y="-628.8" font-family="Times,serif" font-size="14.00" fill="#000000">name:</text>
+<text text-anchor="start" x="757.0239" y="-628.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-602 700,-622 828,-622 828,-602 700,-602"/>
+<text text-anchor="start" x="711.9272" y="-608.8" font-family="Times,serif" font-size="14.00" fill="#000000">comment:</text>
+<text text-anchor="start" x="767.9136" y="-608.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- host_group_acls&#45;&gt;host_groups -->
+<g id="edge2" class="edge">
+<title>host_group_acls:host_group_id&#45;&gt;host_groups:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-663C443.884,-663 494.0731,-710.3866 689.9535,-711.9599"/>
+<polygon fill="#444444" stroke="#444444" points="699.986,-715.5 690.0001,-711.96 700.014,-708.5 699.986,-715.5"/>
+</g>
+<!-- host_host_groups -->
+<g id="node4" class="node">
+<title>host_host_groups</title>
+<polygon fill="#dddddd" stroke="transparent" points="137,-787 137,-807 243,-807 243,-787 137,-787"/>
+<polygon fill="none" stroke="#000000" points="137,-787 137,-807 243,-807 243,-787 137,-787"/>
+<text text-anchor="start" x="140.6069" y="-792.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_host_groups</text>
+<polygon fill="none" stroke="#000000" points="137,-767 137,-787 243,-787 243,-767 137,-767"/>
+<text text-anchor="start" x="159.3872" y="-773.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_id:</text>
+<text text-anchor="start" x="204.5044" y="-773.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="137,-747 137,-767 243,-767 243,-747 137,-747"/>
+<text text-anchor="start" x="139.5562" y="-753.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_group_id:</text>
+<text text-anchor="start" x="224.3354" y="-753.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+</g>
+<!-- host_host_groups&#45;&gt;host_groups -->
+<g id="edge4" class="edge">
+<title>host_host_groups:host_group_id&#45;&gt;host_groups:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-757C443.7051,-757 494.243,-713.4817 689.9622,-712.0368"/>
+<polygon fill="#444444" stroke="#444444" points="700.0129,-715.5 690.0001,-712.0368 699.9871,-708.5 700.0129,-715.5"/>
+</g>
+<!-- hosts -->
+<g id="node5" class="node">
+<title>hosts</title>
+<polygon fill="#dddddd" stroke="transparent" points="700,-1008 700,-1028 828,-1028 828,-1008 700,-1008"/>
+<polygon fill="none" stroke="#000000" points="700,-1008 700,-1028 828,-1028 828,-1008 700,-1008"/>
+<text text-anchor="start" x="749.6069" y="-1013.8" font-family="Times,serif" font-size="14.00" fill="#000000">hosts</text>
+<polygon fill="none" stroke="#000000" points="700,-988 700,-1008 828,-1008 828,-988 700,-988"/>
+<text text-anchor="start" x="748.5562" y="-994.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="763.3354" y="-994.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="700,-968 700,-988 828,-988 828,-968 700,-968"/>
+<text text-anchor="start" x="704.501" y="-974.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="765.9014" y="-974.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-948 700,-968 828,-968 828,-948 700,-948"/>
+<text text-anchor="start" x="702.5459" y="-954.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
+<text text-anchor="start" x="767.8564" y="-954.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-928 700,-948 828,-948 828,-928 700,-928"/>
+<text text-anchor="start" x="704.4941" y="-934.8" font-family="Times,serif" font-size="14.00" fill="#000000">deleted_at:</text>
+<text text-anchor="start" x="765.9082" y="-934.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-908 700,-928 828,-928 828,-908 700,-908"/>
+<text text-anchor="start" x="722.8169" y="-914.8" font-family="Times,serif" font-size="14.00" fill="#000000">name:</text>
+<text text-anchor="start" x="757.0239" y="-914.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-888 700,-908 828,-908 828,-888 700,-888"/>
+<text text-anchor="start" x="725.5376" y="-894.8" font-family="Times,serif" font-size="14.00" fill="#000000">addr:</text>
+<text text-anchor="start" x="754.3032" y="-894.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-868 700,-888 828,-888 828,-868 700,-868"/>
+<text text-anchor="start" x="726.3135" y="-874.8" font-family="Times,serif" font-size="14.00" fill="#000000">user:</text>
+<text text-anchor="start" x="753.5273" y="-874.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-848 700,-868 828,-868 828,-848 700,-848"/>
+<text text-anchor="start" x="711.5342" y="-854.8" font-family="Times,serif" font-size="14.00" fill="#000000">password:</text>
+<text text-anchor="start" x="768.3066" y="-854.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-828 700,-848 828,-848 828,-828 700,-828"/>
+<text text-anchor="start" x="722.501" y="-834.8" font-family="Times,serif" font-size="14.00" fill="#000000">ssh_key_id:</text>
+<text text-anchor="start" x="789.3906" y="-834.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="700,-808 700,-828 828,-828 828,-808 700,-808"/>
+<text text-anchor="start" x="708.4238" y="-814.8" font-family="Times,serif" font-size="14.00" fill="#000000">fingerprint:</text>
+<text text-anchor="start" x="771.417" y="-814.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-788 700,-808 828,-808 828,-788 700,-788"/>
+<text text-anchor="start" x="711.9272" y="-794.8" font-family="Times,serif" font-size="14.00" fill="#000000">comment:</text>
+<text text-anchor="start" x="767.9136" y="-794.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-768 700,-788 828,-788 828,-768 700,-768"/>
+<text text-anchor="start" x="708.3394" y="-774.8" font-family="Times,serif" font-size="14.00" fill="#000000">host_key:</text>
+<text text-anchor="start" x="762.7808" y="-774.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARBINARY</text>
+</g>
+<!-- host_host_groups&#45;&gt;hosts -->
+<g id="edge3" class="edge">
+<title>host_host_groups:host_id&#45;&gt;hosts:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-777C465.1991,-777 474.1608,-991.3602 689.9044,-997.8496"/>
+<polygon fill="#444444" stroke="#444444" points="699.9478,-1001.4996 690.0011,-997.851 700.0522,-994.5004 699.9478,-1001.4996"/>
+</g>
+<!-- ssh_keys -->
+<g id="node8" class="node">
+<title>ssh_keys</title>
+<polygon fill="#dddddd" stroke="transparent" points="1255,-848 1255,-868 1383,-868 1383,-848 1255,-848"/>
+<polygon fill="none" stroke="#000000" points="1255,-848 1255,-868 1383,-868 1383,-848 1255,-848"/>
+<text text-anchor="start" x="1293.7207" y="-853.8" font-family="Times,serif" font-size="14.00" fill="#000000">ssh_keys</text>
+<polygon fill="none" stroke="#000000" points="1255,-828 1255,-848 1383,-848 1383,-828 1255,-828"/>
+<text text-anchor="start" x="1303.5562" y="-834.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="1318.3354" y="-834.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="1255,-808 1255,-828 1383,-828 1383,-808 1255,-808"/>
+<text text-anchor="start" x="1259.501" y="-814.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="1320.9014" y="-814.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="1255,-788 1255,-808 1383,-808 1383,-788 1255,-788"/>
+<text text-anchor="start" x="1257.5459" y="-794.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
+<text text-anchor="start" x="1322.8564" y="-794.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="1255,-768 1255,-788 1383,-788 1383,-768 1255,-768"/>
+<text text-anchor="start" x="1259.4941" y="-774.8" font-family="Times,serif" font-size="14.00" fill="#000000">deleted_at:</text>
+<text text-anchor="start" x="1320.9082" y="-774.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="1255,-748 1255,-768 1383,-768 1383,-748 1255,-748"/>
+<text text-anchor="start" x="1277.8169" y="-754.8" font-family="Times,serif" font-size="14.00" fill="#000000">name:</text>
+<text text-anchor="start" x="1312.0239" y="-754.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="1255,-728 1255,-748 1383,-748 1383,-728 1255,-728"/>
+<text text-anchor="start" x="1280.9238" y="-734.8" font-family="Times,serif" font-size="14.00" fill="#000000">type:</text>
+<text text-anchor="start" x="1308.917" y="-734.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="1255,-708 1255,-728 1383,-728 1383,-708 1255,-708"/>
+<text text-anchor="start" x="1291.5044" y="-714.8" font-family="Times,serif" font-size="14.00" fill="#000000">length:</text>
+<text text-anchor="start" x="1330.3872" y="-714.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="1255,-688 1255,-708 1383,-708 1383,-688 1255,-688"/>
+<text text-anchor="start" x="1263.4238" y="-694.8" font-family="Times,serif" font-size="14.00" fill="#000000">fingerprint:</text>
+<text text-anchor="start" x="1326.417" y="-694.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="1255,-668 1255,-688 1383,-688 1383,-668 1255,-668"/>
+<text text-anchor="start" x="1268.0928" y="-674.8" font-family="Times,serif" font-size="14.00" fill="#000000">priv_key:</text>
+<text text-anchor="start" x="1321.748" y="-674.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="1255,-648 1255,-668 1383,-668 1383,-648 1255,-648"/>
+<text text-anchor="start" x="1268.8687" y="-654.8" font-family="Times,serif" font-size="14.00" fill="#000000">pub_key:</text>
+<text text-anchor="start" x="1320.9722" y="-654.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="1255,-628 1255,-648 1383,-648 1383,-628 1255,-628"/>
+<text text-anchor="start" x="1266.9272" y="-634.8" font-family="Times,serif" font-size="14.00" fill="#000000">comment:</text>
+<text text-anchor="start" x="1322.9136" y="-634.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- hosts&#45;&gt;ssh_keys -->
+<g id="edge5" class="edge">
+<title>hosts:ssh_key_id&#45;&gt;ssh_keys:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M828,-838C1014.3492,-838 1063.4615,-838 1244.8519,-838"/>
+<polygon fill="#444444" stroke="#444444" points="1255,-841.5 1245,-838.0001 1255,-834.5 1255,-841.5"/>
+</g>
+<!-- migrations -->
+<g id="node6" class="node">
+<title>migrations</title>
+<polygon fill="#dddddd" stroke="transparent" points="156,-853 156,-873 224,-873 224,-853 156,-853"/>
+<polygon fill="none" stroke="#000000" points="156,-853 156,-873 224,-873 224,-853 156,-853"/>
+<text text-anchor="start" x="160.0586" y="-858.8" font-family="Times,serif" font-size="14.00" fill="#000000">migrations</text>
+<polygon fill="none" stroke="#000000" points="156,-833 156,-853 224,-853 224,-833 156,-833"/>
+<text text-anchor="start" x="158.5308" y="-839.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="173.3101" y="-839.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- settings -->
+<g id="node7" class="node">
+<title>settings</title>
+<polygon fill="#dddddd" stroke="transparent" points="126,-1019 126,-1039 254,-1039 254,-1019 126,-1019"/>
+<polygon fill="none" stroke="#000000" points="126,-1019 126,-1039 254,-1039 254,-1019 126,-1019"/>
+<text text-anchor="start" x="168.6104" y="-1024.8" font-family="Times,serif" font-size="14.00" fill="#000000">settings</text>
+<polygon fill="none" stroke="#000000" points="126,-999 126,-1019 254,-1019 254,-999 126,-999"/>
+<text text-anchor="start" x="174.5562" y="-1005.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="189.3354" y="-1005.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="126,-979 126,-999 254,-999 254,-979 126,-979"/>
+<text text-anchor="start" x="130.501" y="-985.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="191.9014" y="-985.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
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+<text text-anchor="start" x="128.5459" y="-965.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
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+<text text-anchor="start" x="148.8169" y="-925.8" font-family="Times,serif" font-size="14.00" fill="#000000">name:</text>
+<text text-anchor="start" x="183.0239" y="-925.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
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+<text text-anchor="start" x="148.8169" y="-905.8" font-family="Times,serif" font-size="14.00" fill="#000000">value:</text>
+<text text-anchor="start" x="183.0239" y="-905.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- user_group_acls -->
+<g id="node9" class="node">
+<title>user_group_acls</title>
+<polygon fill="#dddddd" stroke="transparent" points="137,-530 137,-550 243,-550 243,-530 137,-530"/>
+<polygon fill="none" stroke="#000000" points="137,-530 137,-550 243,-550 243,-530 137,-530"/>
+<text text-anchor="start" x="144.124" y="-535.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_group_acls</text>
+<polygon fill="none" stroke="#000000" points="137,-510 137,-530 243,-530 243,-510 137,-510"/>
+<text text-anchor="start" x="139.563" y="-516.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_group_id:</text>
+<text text-anchor="start" x="224.3286" y="-516.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="137,-490 137,-510 243,-510 243,-490 137,-490"/>
+<text text-anchor="start" x="162.8975" y="-496.8" font-family="Times,serif" font-size="14.00" fill="#000000">acl_id:</text>
+<text text-anchor="start" x="200.9941" y="-496.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+</g>
+<!-- user_group_acls&#45;&gt;acls -->
+<g id="edge6" class="edge">
+<title>user_group_acls:acl_id&#45;&gt;acls:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-500C443.7485,-500 494.2019,-544.4853 689.9601,-545.9624"/>
+<polygon fill="#444444" stroke="#444444" points="699.9869,-549.5 690.0001,-545.9624 700.0131,-542.5 699.9869,-549.5"/>
+</g>
+<!-- user_groups -->
+<g id="node10" class="node">
+<title>user_groups</title>
+<polygon fill="#dddddd" stroke="transparent" points="700,-350 700,-370 828,-370 828,-350 700,-350"/>
+<polygon fill="none" stroke="#000000" points="700,-350 700,-370 828,-370 828,-350 700,-350"/>
+<text text-anchor="start" x="729.7827" y="-355.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_groups</text>
+<polygon fill="none" stroke="#000000" points="700,-330 700,-350 828,-350 828,-330 700,-330"/>
+<text text-anchor="start" x="748.5562" y="-336.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="763.3354" y="-336.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="700,-310 700,-330 828,-330 828,-310 700,-310"/>
+<text text-anchor="start" x="704.501" y="-316.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="765.9014" y="-316.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-290 700,-310 828,-310 828,-290 700,-290"/>
+<text text-anchor="start" x="702.5459" y="-296.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
+<text text-anchor="start" x="767.8564" y="-296.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-270 700,-290 828,-290 828,-270 700,-270"/>
+<text text-anchor="start" x="704.4941" y="-276.8" font-family="Times,serif" font-size="14.00" fill="#000000">deleted_at:</text>
+<text text-anchor="start" x="765.9082" y="-276.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-250 700,-270 828,-270 828,-250 700,-250"/>
+<text text-anchor="start" x="722.8169" y="-256.8" font-family="Times,serif" font-size="14.00" fill="#000000">name:</text>
+<text text-anchor="start" x="757.0239" y="-256.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-230 700,-250 828,-250 828,-230 700,-230"/>
+<text text-anchor="start" x="711.9272" y="-236.8" font-family="Times,serif" font-size="14.00" fill="#000000">comment:</text>
+<text text-anchor="start" x="767.9136" y="-236.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- user_group_acls&#45;&gt;user_groups -->
+<g id="edge7" class="edge">
+<title>user_group_acls:user_group_id&#45;&gt;user_groups:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-520C457.8873,-520 481.0158,-345.5811 689.9107,-340.1305"/>
+<polygon fill="#444444" stroke="#444444" points="700.0453,-343.4997 690.0008,-340.1294 699.9547,-336.5003 700.0453,-343.4997"/>
+</g>
+<!-- user_keys -->
+<g id="node11" class="node">
+<title>user_keys</title>
+<polygon fill="#dddddd" stroke="transparent" points="118,-284 118,-304 262,-304 262,-284 118,-284"/>
+<polygon fill="none" stroke="#000000" points="118,-284 118,-304 262,-304 262,-284 118,-284"/>
+<text text-anchor="start" x="162.0068" y="-289.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_keys</text>
+<polygon fill="none" stroke="#000000" points="118,-264 118,-284 262,-284 262,-264 118,-264"/>
+<text text-anchor="start" x="174.5562" y="-270.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="189.3354" y="-270.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="118,-244 118,-264 262,-264 262,-244 118,-244"/>
+<text text-anchor="start" x="130.501" y="-250.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="191.9014" y="-250.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="118,-224 118,-244 262,-244 262,-224 118,-224"/>
+<text text-anchor="start" x="128.5459" y="-230.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
+<text text-anchor="start" x="193.8564" y="-230.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="118,-204 118,-224 262,-224 262,-204 118,-204"/>
+<text text-anchor="start" x="130.4941" y="-210.8" font-family="Times,serif" font-size="14.00" fill="#000000">deleted_at:</text>
+<text text-anchor="start" x="191.9082" y="-210.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="118,-184 118,-204 262,-204 262,-184 118,-184"/>
+<text text-anchor="start" x="149.5083" y="-190.8" font-family="Times,serif" font-size="14.00" fill="#000000">key:</text>
+<text text-anchor="start" x="173.6118" y="-190.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARBINARY</text>
+<polygon fill="none" stroke="#000000" points="118,-164 118,-184 262,-184 262,-164 118,-164"/>
+<text text-anchor="start" x="159.394" y="-170.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_id:</text>
+<text text-anchor="start" x="204.4976" y="-170.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="118,-144 118,-164 262,-164 262,-144 118,-144"/>
+<text text-anchor="start" x="137.9272" y="-150.8" font-family="Times,serif" font-size="14.00" fill="#000000">comment:</text>
+<text text-anchor="start" x="193.9136" y="-150.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="118,-124 118,-144 262,-144 262,-124 118,-124"/>
+<text text-anchor="start" x="120.8271" y="-130.8" font-family="Times,serif" font-size="14.00" fill="#000000">authorized_key:</text>
+<text text-anchor="start" x="211.0137" y="-130.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- users -->
+<g id="node13" class="node">
+<title>users</title>
+<polygon fill="#dddddd" stroke="transparent" points="700,-184 700,-204 828,-204 828,-184 700,-184"/>
+<polygon fill="none" stroke="#000000" points="700,-184 700,-204 828,-204 828,-184 700,-184"/>
+<text text-anchor="start" x="749.6138" y="-189.8" font-family="Times,serif" font-size="14.00" fill="#000000">users</text>
+<polygon fill="none" stroke="#000000" points="700,-164 700,-184 828,-184 828,-164 700,-164"/>
+<text text-anchor="start" x="748.5562" y="-170.8" font-family="Times,serif" font-size="14.00" fill="#000000">id:</text>
+<text text-anchor="start" x="763.3354" y="-170.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="700,-144 700,-164 828,-164 828,-144 700,-144"/>
+<text text-anchor="start" x="704.501" y="-150.8" font-family="Times,serif" font-size="14.00" fill="#000000">created_at:</text>
+<text text-anchor="start" x="765.9014" y="-150.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-124 700,-144 828,-144 828,-124 700,-124"/>
+<text text-anchor="start" x="702.5459" y="-130.8" font-family="Times,serif" font-size="14.00" fill="#000000">updated_at:</text>
+<text text-anchor="start" x="767.8564" y="-130.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-104 700,-124 828,-124 828,-104 700,-104"/>
+<text text-anchor="start" x="704.4941" y="-110.8" font-family="Times,serif" font-size="14.00" fill="#000000">deleted_at:</text>
+<text text-anchor="start" x="765.9082" y="-110.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TIMESTAMP</text>
+<polygon fill="none" stroke="#000000" points="700,-84 700,-104 828,-104 828,-84 700,-84"/>
+<text text-anchor="start" x="716.9463" y="-90.8" font-family="Times,serif" font-size="14.00" fill="#000000">is_admin:</text>
+<text text-anchor="start" x="772.167" y="-90.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">TINYINT</text>
+<polygon fill="none" stroke="#000000" points="700,-64 700,-84 828,-84 828,-64 700,-64"/>
+<text text-anchor="start" x="722.4272" y="-70.8" font-family="Times,serif" font-size="14.00" fill="#000000">email:</text>
+<text text-anchor="start" x="757.4136" y="-70.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-44 700,-64 828,-64 828,-44 700,-44"/>
+<text text-anchor="start" x="722.8169" y="-50.8" font-family="Times,serif" font-size="14.00" fill="#000000">name:</text>
+<text text-anchor="start" x="757.0239" y="-50.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-24 700,-44 828,-44 828,-24 700,-24"/>
+<text text-anchor="start" x="711.9272" y="-30.8" font-family="Times,serif" font-size="14.00" fill="#000000">comment:</text>
+<text text-anchor="start" x="767.9136" y="-30.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+<polygon fill="none" stroke="#000000" points="700,-4 700,-24 828,-24 828,-4 700,-4"/>
+<text text-anchor="start" x="702.9824" y="-10.8" font-family="Times,serif" font-size="14.00" fill="#000000">invite_token:</text>
+<text text-anchor="start" x="776.8584" y="-10.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">VARCHAR</text>
+</g>
+<!-- user_keys&#45;&gt;users -->
+<g id="edge8" class="edge">
+<title>user_keys:user_id&#45;&gt;users:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M262,-174C453.2448,-174 503.5773,-174 689.8681,-174"/>
+<polygon fill="#444444" stroke="#444444" points="700,-177.5 690,-174.0001 700,-170.5 700,-177.5"/>
+</g>
+<!-- user_user_groups -->
+<g id="node12" class="node">
+<title>user_user_groups</title>
+<polygon fill="#dddddd" stroke="transparent" points="137,-370 137,-390 243,-390 243,-370 137,-370"/>
+<polygon fill="none" stroke="#000000" points="137,-370 137,-390 243,-390 243,-370 137,-370"/>
+<text text-anchor="start" x="140.6206" y="-375.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_user_groups</text>
+<polygon fill="none" stroke="#000000" points="137,-350 137,-370 243,-370 243,-350 137,-350"/>
+<text text-anchor="start" x="159.394" y="-356.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_id:</text>
+<text text-anchor="start" x="204.4976" y="-356.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+<polygon fill="none" stroke="#000000" points="137,-330 137,-350 243,-350 243,-330 137,-330"/>
+<text text-anchor="start" x="139.563" y="-336.8" font-family="Times,serif" font-size="14.00" fill="#000000">user_group_id:</text>
+<text text-anchor="start" x="224.3286" y="-336.8" font-family="Helvetica,sans-Serif" font-style="oblique" font-size="10.00" fill="#000000">INT</text>
+</g>
+<!-- user_user_groups&#45;&gt;user_groups -->
+<g id="edge10" class="edge">
+<title>user_user_groups:user_group_id&#45;&gt;user_groups:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-340C442.64,-340 495.1088,-340 689.7185,-340"/>
+<polygon fill="#444444" stroke="#444444" points="700,-343.5 690,-340.0001 700,-336.5 700,-343.5"/>
+</g>
+<!-- user_user_groups&#45;&gt;users -->
+<g id="edge9" class="edge">
+<title>user_user_groups:user_id&#45;&gt;users:id</title>
+<path fill="none" stroke="#444444" stroke-dasharray="5,2" d="M243,-360C458.8631,-360 480.0858,-179.7671 689.8664,-174.1348"/>
+<polygon fill="#444444" stroke="#444444" points="700.0466,-177.4997 690.0009,-174.1331 699.9534,-170.5003 700.0466,-177.4997"/>
+</g>
+</g>
+</svg>

.circleci/config.yml

@@ -0,0 +1,40 @@
+defaults: &defaults
+  working_directory: /go/src/github.com/moul/sshportal
+  docker:
+    - image: circleci/golang:1.8
+
+version: 2
+jobs:
+  go.build:
+    <<: *defaults
+    steps:
+      - checkout
+      - run: make install
+      - run: go get -v -t .
+      - run: make test
+      # - run: make integration
+      - run: go get -u github.com/alecthomas/gometalinter
+      - run: gometalinter --install
+      - run: make lint
+  docker.integration:
+    <<: *defaults
+    steps:
+      - checkout
+      - run:
+          name: Install Docker Compose
+          command: |
+            umask 022
+            curl -L https://github.com/docker/compose/releases/download/1.11.2/docker-compose-`uname -s`-`uname -m` > ~/docker-compose
+      - setup_remote_docker:
+          docker_layer_caching: true
+      - run: docker build -t moul/sshportal .
+      - run: make integration
+
+
+workflows:
+  version: 2
+  build_and_integration:
+    jobs:
+      - go.build
+      - docker.integration
+      # requires: docker.build?

.dockerignore

@@ -1 +1,4 @@
-examples
+examples/
+.circleci/
+.assets/
+/sshportal

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,25 @@
+<!-- Thanks for filling an issue!
+
+If this is a BUG REPORT, please:
+  - Fill in as much of the template below as you can
+
+If this is a FEATURE REQUEST, please:
+  - Describe *in detail* the feature/behavior/change you would like to see
+-->
+
+**What happened**:
+
+**What you expected to happen**:
+
+**How to reproduce it (as minimally and precisely as possible)**:
+
+**Anything else we need to know?**:
+
+<!--
+**Environment**:
+- sshportal --version
+- ssh sshportal info
+- OS (e.g. from /etc/os-release): 
+- install method (e.g. go/docker/brew/...):
+- others:
+-->

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,7 @@
+<!--  Thanks for sending a pull request!  Here are some tips for you -->
+
+**What this PR does / why we need it**:
+
+**Which issue this PR fixes**: fixes #xxx, fixes #xxx...
+
+**Special notes for your reviewer**:

.gitignore

@@ -1,3 +1,4 @@
+/log/
 /sshportal
 *.db
 /data

CHANGELOG.md

@@ -1,5 +1,57 @@
 # Changelog
 
+## v1.8.0 (2018-04-02)
+
+* The default created user now has the same username as the user starting sshportal (was hardcoded "admin")
+* Add Telnet support
+* Add TTY audit feature ([#23](https://github.com/moul/sshportal/issues/23)) by [@sabban](https://github.com/sabban)
+* Fix `--assign-*` commands when using MySQL driver ([#45](https://github.com/moul/sshportal/issues/45))
+* Add *HOP* support, an efficient and integrated way of using a jump host transparently ([#47](https://github.com/moul/sshportal/issues/47)) by [@mathieui](https://github.com/mathieui)
+* Fix panic on some `ls` commands ([#54](https://github.com/moul/sshportal/pull/54)) by [@jle64](https://github.com/jle64)
+* Add tunnels (`direct-tcp`) support with logging ([#44](https://github.com/moul/sshportal/issues/44)) by [@sabban](https://github.com/sabban)
+* Add `key import` command ([#52](https://github.com/moul/sshportal/issues/52)) by [@adyxax](https://github.com/adyxax)
+* Add 'exec' logging ([#40](https://github.com/moul/sshportal/issues/40)) by [@sabban](https://github.com/sabban)
+
+## v1.7.1 (2018-01-03)
+
+* Return non-null exit-code on authentication error
+* **hotfix**: repair invite system (broken in v1.7.0)
+
+## v1.7.0 (2018-01-02)
+
+Breaking changes:
+* Use `sshportal server` instead of `sshportal` to start a new server (nothing to change if using the docker image)
+* Remove `--config-user` and `--healthcheck-user` global options
+
+Changes:
+* Fix connection failure when sending too many environment variables (fix [#22](https://github.com/moul/sshportal/issues/22))
+* Fix panic when entering empty command (fix [#13](https://github.com/moul/sshportal/issues/13))
+* Add `config backup --ignore-events` option
+* Add `sshportal healthcheck [--addr=] [--wait] [--quiet]` cli command
+* Add [Docker Healthcheck](https://docs.docker.com/engine/reference/builder/#healthcheck) helper
+* Support Putty (fix [#24](https://github.com/moul/sshportal/issues/24))
+
+## v1.6.0 (2017-12-12)
+
+* Add `--latest` and `--quiet` options to `ls` commands
+* Add `healthcheck` user
+* Add `key show KEY` command
+
+## v1.5.0 (2017-12-02)
+
+* Create Session objects on each connections (history)
+* Connection history
+* Audit log
+* Add dynamic strict host key checking (learning on the first time, strict on the next ones)
+* Add-back MySQL support (experimental)
+* Fix some backup/restore bugs
+
+## v1.4.0 (2017-11-24)
+
+* Add 'key setup' command (easy SSH key installation)
+* Add Updated and Created fields in 'ls' commands
+* Add `--aes-key` option to encrypt sensitive data
+
 ## v1.3.0 (2017-11-23)
 
 * More details in 'ls' commands

Dockerfile

@@ -5,6 +5,9 @@ WORKDIR         /go/src/github.com/moul/sshportal
 RUN             make _docker_install
 
 # minimal runtime
-FROM            scratch
+FROM            alpine
 COPY            --from=builder /go/bin/sshportal /bin/sshportal
 ENTRYPOINT      ["/bin/sshportal"]
+CMD             ["server"]
+EXPOSE          2222
+HEALTHCHECK     CMD /bin/sshportal healthcheck --wait

LICENSE

@@ -0,0 +1,201 @@
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Makefile

@@ -1,13 +1,13 @@
 GIT_SHA ?=	$(shell git rev-parse HEAD)
 GIT_TAG ?=	$(shell git describe --tags --always)
 GIT_BRANCH ?=	$(shell git rev-parse --abbrev-ref HEAD)
-LDFLAGS ?=	-X main.GIT_SHA=$(GIT_SHA) -X main.GIT_TAG=$(GIT_TAG) -X main.GIT_BRANCH=$(GIT_BRANCH)
+LDFLAGS ?=	-X main.GitSha=$(GIT_SHA) -X main.GitTag=$(GIT_TAG) -X main.GitBranch=$(GIT_BRANCH)
 VERSION ?=	$(shell grep 'VERSION =' main.go | cut -d'"' -f2)
-PORT ?=		2222
+AES_KEY ?=	my-dummy-aes-key
 
 .PHONY: install
 install:
-	go install -ldflags '$(LDFLAGS)' .
+	go install -v -ldflags '$(LDFLAGS)' .
 
 .PHONY: docker.build
 docker.build:
@@ -15,7 +15,7 @@ docker.build:
 
 .PHONY: integration
 integration:
-	PORT="$(PORT)" bash ./examples/integration/test.sh
+	cd ./examples/integration && make
 
 .PHONY: _docker_install
 _docker_install:
@@ -24,14 +24,23 @@ _docker_install:
 .PHONY: dev
 dev:
 	-go get github.com/githubnemo/CompileDaemon
-	CompileDaemon -exclude-dir=.git -exclude=".#*" -color=true -command="./sshportal --demo --debug --bind-address=:$(PORT)" .
+	CompileDaemon -exclude-dir=.git -exclude=".#*" -color=true -command="./sshportal server --debug --bind-address=:$(PORT) --aes-key=$(AES_KEY) $(EXTRA_RUN_OPTS)" .
 
 .PHONY: test
 test:
 	go test -i .
 	go test -v .
 
+.PHONY: lint
+lint:
+	gometalinter --disable-all --enable=errcheck --enable=vet --enable=vetshadow --enable=golint --enable=gas --enable=ineffassign --enable=goconst --enable=goimports --enable=gofmt --exclude="should have comment" --enable=staticcheck --enable=gosimple --enable=misspell --deadline=60s .
+
 .PHONY: backup
 backup:
 	mkdir -p data/backups
 	cp sshportal.db data/backups/$(shell date +%s)-$(VERSION)-sshportal.sqlite
+
+doc:
+	dot -Tsvg ./.assets/overview.dot > ./.assets/overview.svg
+	dot -Tsvg ./.assets/cluster-mysql.dot > ./.assets/cluster-mysql.svg
+	dot -Tsvg ./.assets/flow-diagram.dot > ./.assets/flow-diagram.svg

README.md

@@ -1,43 +1,70 @@
 # sshportal
 
+[![CircleCI](https://circleci.com/gh/moul/sshportal.svg?style=svg)](https://circleci.com/gh/moul/sshportal)
+[![Docker Build Status](https://img.shields.io/docker/build/moul/sshportal.svg)](https://hub.docker.com/r/moul/sshportal/)
+[![Go Report Card](https://goreportcard.com/badge/github.com/moul/sshportal)](https://goreportcard.com/report/github.com/moul/sshportal)
+[![GoDoc](https://godoc.org/github.com/moul/sshportal?status.svg)](https://godoc.org/github.com/moul/sshportal)
+[![License](https://img.shields.io/github/license/moul/sshportal.svg)](https://github.com/moul/sshportal/blob/master/LICENSE)
+[![GitHub release](https://img.shields.io/github/release/moul/sshportal.svg)](https://github.com/moul/sshportal/releases)
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fmoul%2Fsshportal.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fmoul%2Fsshportal?ref=badge_shield)
+
 Jump host/Jump server without the jump, a.k.a Transparent SSH bastion
 
-```
-                       ┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─
-                                  DMZ           │
-┌────────┐             │             ┌────────┐
-│ homer  │───▶╔═════════════════╗───▶│ host1  │ │
-└────────┘    ║                 ║    └────────┘
-┌────────┐    ║                 ║    ┌────────┐ │
-│  bart  │───▶║    sshportal    ║───▶│ host2  │
-└────────┘    ║                 ║    └────────┘ │
-┌────────┐    ║                 ║    ┌────────┐
-│  lisa  │───▶╚═════════════════╝───▶│ host3  │ │
-└────────┘             │             └────────┘
-┌────────┐                           ┌────────┐ │
-│  ...   │             │             │  ...   │
-└────────┘                           └────────┘ │
-                       └ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─
-```
+![sshportal demo](https://github.com/moul/sshportal/raw/master/.assets/demo.gif)
+
+---
+
+## Overview
+
+![sshportal overview](https://raw.github.com/moul/sshportal/master/.assets/overview.svg?sanitize=true)
 
 ## Features
 
-* Host management
-* User management
-* User Group management
-* Host Group management
-* Host Key management
-* User Key management
-* ACL management
-* Connect to host using key or password
+* Single autonomous binary (~10-20Mb) with no runtime dependencies (embeds ssh server and client)
+* Portable / Cross-platform (regularly tested on linux and OSX/darwin)
+* Store data in [Sqlite3](https://www.sqlite.org/) or [MySQL](https://www.mysql.com) (probably easy to add postgres, mssql thanks to gorm)
+* Stateless -> horizontally scalable when using [MySQL](https://www.mysql.com) as the backend
+* Connect to remote host using key or password
 * Admin commands can be run directly or in an interactive shell
+* Host management
+* User management (invite, group, stats)
+* Host Key management (create, remove, update, import)
+* Automatic remote host key learning
+* User Key management (multile keys per user)
+* ACL management (acl+user-groups+host-groups)
+* User roles (admin, trusted, standard, ...)
+* User invitations (no more "give me your public ssh key please")
+* Easy server installation (generate shell command to setup `authorized_keys`)
+* Sensitive data encryption
+* Session management (see active connections, history, stats, stop)
+* Audit log (logging every user action)
+* Record TTY Session
+* Tunnels logging
+* Host Keys verifications shared across users
+* Healthcheck user (replying OK to any user)
+* SSH compatibility
+  * ipv4 and ipv6 support
+  * [`scp`](https://linux.die.net/man/1/scp) support
+  * [`rsync`](https://linux.die.net/man/1/rsync) support
+  * [tunneling](https://www.ssh.com/ssh/tunneling/example) (local forward, remote forward, dynamic forward) support
+  * [`sftp`](https://www.ssh.com/ssh/sftp/) support
+  * [`ssh-agent`](https://www.ssh.com/ssh/agent) support
+  * [`X11 forwarding`](http://en.tldp.org/HOWTO/XDMCP-HOWTO/ssh.html) support
+  * Git support (can be used to easily use multiple user keys on GitHub, or access your own firewalled gitlab server)
+  * Do not require any SSH client modification or custom `.ssh/config`, works with every tested SSH programming libraries and every tested SSH clients
+* SSH to non-SSH proxy
+  * [Telnet](https://www.ssh.com/ssh/telnet) support
+
+## (Known) limitations
+
+* Does not work (yet?) with [`mosh`](https://mosh.org/)
 
 ## Usage
 
 Start the server
 
 ```console
-$ sshportal
+$ sshportal server
 2017/11/13 10:58:35 Admin user created, use the user 'invite:BpLnfgDsc2WD8F2q' to associate a public key with this account
 2017/11/13 10:58:35 SSH Server accepting connections on :2222
 ```
@@ -46,7 +73,7 @@ Link your SSH key with the admin account
 
 ```console
 $ ssh localhost -p 2222 -l invite:BpLnfgDsc2WD8F2q
-Welcome Administrator!
+Welcome admin!
 
 Your key is now associated with the user "admin@sshportal".
 Shared connection to localhost closed.
@@ -80,28 +107,18 @@ List hosts
 
 ```console
 config> host ls
-  ID | NAME |           URL           |   KEY   | PASS | GROUPS | COMMENT
-+----+------+-------------------------+---------+------+--------+---------+
-   1 | foo  | bart@foo.example.org:22 | default |      |      1 |
+  ID | NAME |           URL           |   KEY   | PASS | GROUPS  | COMMENT
++----+------+-------------------------+---------+------+---------+---------+
+   1 | foo  | bart@foo.example.org:22 | default |      | default |
 Total: 1 hosts.
 config>
 ```
 
-Get the default key in authorized_keys format
+Add the key to the server
 
 ```console
-config> key inspect default
-[...]
-    "PubKey": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvUP/8FedyIe+a+RWU4KvJ1+iZwtWmY9czJubLwN4RcjKHQMzLqWC7pKZHAABCZjLJjVD/3Zb53jZwbh7mysAkocundMpvUL5+Yb4a8lDiflXkdXT9fZCx+ibJBk4jRnKLGIneSzVtFEerEwQKKnKQoCgPkZwCDaL/jHhDlOmAvxqAJrjiy42HXwppX2UuF8zujs6OKHRYJ/Q1vo0caa6/o1eoyXE9OrOwIk+IcAN3YIQi/B1BOlZOQBzHIZz83AFlD2TcPhyYcbxPyKGih84Zr3rQaaP1WiaiPqxzp3s5OhTLthc5XtCSLzmRSLvgC2eFdNhBDB5KLtO2khBkz5ID",
-[...]
-config>
-```
-
-Add this key to the server
-
-```console
-$ ssh bart@foo.example.org
-> umask 077; mkdir -p .ssh; echo ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvUP/8FedyIe+a+RWU4KvJ1+iZwtWmY9czJubLwN4RcjKHQMzLqWC7pKZHAABCZjLJjVD/3Zb53jZwbh7mysAkocundMpvUL5+Yb4a8lDiflXkdXT9fZCx+ibJBk4jRnKLGIneSzVtFEerEwQKKnKQoCgPkZwCDaL/jHhDlOmAvxqAJrjiy42HXwppX2UuF8zujs6OKHRYJ/Q1vo0caa6/o1eoyXE9OrOwIk+IcAN3YIQi/B1BOlZOQBzHIZz83AFlD2TcPhyYcbxPyKGih84Zr3rQaaP1WiaiPqxzp3s5OhTLthc5XtCSLzmRSLvgC2eFdNhBDB5KLtO2khBkz5ID >> .ssh/authorized_keys
+$ ssh bart@foo.example.org "$(ssh localhost -p 2222 -l admin key setup default)"
+$
 ```
 
 Profit
@@ -113,16 +130,22 @@ bart@foo>
 
 Invite friends
 
+*This command doesn't create a user on the remote server, it only creates an account in the sshportal database.*
+
 ```console
 config> user invite bob@example.com
 User 2 created.
-To associate this account with a key, use the following SSH user: 'invite-NfHK5a84jjJkwzDk'.
+To associate this account with a key, use the following SSH user: 'invite:NfHK5a84jjJkwzDk'.
 config>
 ```
 
-## CLI
+## Flow Diagram
 
-sshportal embeds a configuration CLI.
+![Flow Diagram](https://raw.github.com/moul/sshportal/master/.assets/flow-diagram.svg?sanitize=true)
+
+## built-in shell
+
+`sshportal` embeds a configuration CLI.
 
 By default, the configuration user is `admin`, (can be changed using `--config-user=<value>` when starting the server.
 
@@ -141,42 +164,55 @@ You can enter in interactive mode using this syntax: `ssh admin@portal.example.o
 acl help
 acl create [-h] [--hostgroup=HOSTGROUP...] [--usergroup=USERGROUP...] [--pattern=<value>] [--comment=<value>] [--action=<value>] [--weight=value]
 acl inspect [-h] ACL...
-acl ls [-h]
+acl ls [-h] [--latest] [--quiet]
 acl rm [-h] ACL...
 acl update [-h] [--comment=<value>] [--action=<value>] [--weight=<value>] [--assign-hostgroup=HOSTGROUP...] [--unassign-hostgroup=HOSTGROUP...] [--assign-usergroup=USERGROUP...] [--unassign-usergroup=USERGROUP...] ACL...
 
 # config management
 config help
-config backup [-h] [--indent]
-config restore [-h] [--confirm]
+config backup [-h] [--indent] [--decrypt]
+config restore [-h] [--confirm] [--decrypt]
+
+# event management
+event help
+event ls [-h] [--latest] [--quiet]
+event inspect [-h] EVENT...
 
 # host management
 host help
-host create [-h] [--name=<value>] [--password=<value>] [--fingerprint=<value>] [--comment=<value>] [--key=KEY] [--group=HOSTGROUP...] <username>[:<password>]@<host>[:<port>]
-host inspect [-h] HOST...
-host ls [-h]
+host create [-h] [--name=<value>] [--password=<value>] [--comment=<value>] [--key=KEY] [--group=HOSTGROUP...] [--hop=HOST] <username>[:<password>]@<host>[:<port>]
+host inspect [-h] [--decrypt] HOST...
+host ls [-h] [--latest] [--quiet]
 host rm [-h] HOST...
-host update [-h] [--name=<value>] [--comment=<value>] [--fingerprint=<value>] [--key=KEY] [--assign-group=HOSTGROUP...] [--unassign-group=HOSTGROUP...] HOST...
+host update [-h] [--name=<value>] [--comment=<value>] [--key=KEY] [--assign-group=HOSTGROUP...] [--unassign-group=HOSTGROUP...] [--set-hop=HOST] [--unset-hop] HOST...
 
 # hostgroup management
 hostgroup help
 hostgroup create [-h] [--name=<value>] [--comment=<value>]
 hostgroup inspect [-h] HOSTGROUP...
-hostgroup ls [-h]
+hostgroup ls [-h] [--latest] [--quiet]
 hostgroup rm [-h] HOSTGROUP...
 
 # key management
 key help
 key create [-h] [--name=<value>] [--type=<value>] [--length=<value>] [--comment=<value>]
-key inspect [-h] KEY...
-key ls [-h]
+key import [-h] [--name=<value>] [--comment=<value>]
+key inspect [-h] [--decrypt] KEY...
+key ls [-h] [--latest] [--quiet]
 key rm [-h] KEY...
+key setup [-h] KEY
+key show [-h] KEY
+
+# session management
+session help
+session ls [-h] [--latest] [--quiet]
+session inspect [-h] SESSION...
 
 # user management
 user help
 user invite [-h] [--name=<value>] [--comment=<value>] [--group=USERGROUP...] <email>
 user inspect [-h] USER...
-user ls [-h]
+user ls [-h] [--latest] [--quiet]
 user rm [-h] USER...
 user update [-h] [--name=<value>] [--email=<value>] [--set-admin] [--unset-admin] [--assign-group=USERGROUP...] [--unassign-group=USERGROUP...] USER...
 
@@ -184,7 +220,7 @@ user update [-h] [--name=<value>] [--email=<value>] [--set-admin] [--unset-admin
 usergroup help
 hostgroup create [-h] [--name=<value>] [--comment=<value>]
 usergroup inspect [-h] USERGROUP...
-usergroup ls [-h]
+usergroup ls [-h] [--latest] [--quiet]
 usergroup rm [-h] USERGROUP...
 
 # other
@@ -203,7 +239,7 @@ An [automated build is setup on the Docker Hub](https://hub.docker.com/r/moul/ss
 ```console
 # Start a server in background
 #   mount `pwd` to persist the sqlite database file
-docker run -p 2222:2222 -d --name=sshportal -v "$(pwd):$(pwd)" -w "$(pwd)" moul/sshportal:v1.3.0
+docker run -p 2222:2222 -d --name=sshportal -v "$(pwd):$(pwd)" -w "$(pwd)" moul/sshportal:v1.8.0
 
 # check logs (mandatory on first run to get the administrator invite token)
 docker logs -f sshportal
@@ -212,7 +248,7 @@ docker logs -f sshportal
 The easier way to upgrade sshportal is to do the following:
 
 ```sh
-# we consider you were using the version v1.2.0 and you want to use the new version v1.3.0
+# we consider you were using an old version and you want to use the new version v1.8.0
 
 # stop and rename the last working container + backup the database
 docker stop sshportal
@@ -220,7 +256,7 @@ docker rename sshportal sshportal_old
 cp sshportal.db sshportal.db.bkp
 
 # run the new version
-docker run -p 2222:2222 -d --name=sshportal -v "$(pwd):$(pwd)" -w "$(pwd)" moul/sshportal:v1.3.0
+docker run -p 2222:2222 -d --name=sshportal -v "$(pwd):$(pwd)" -w "$(pwd)" moul/sshportal:v1.8.0
 # check the logs for migration or cross-version incompabitility errors
 docker logs -f sshportal
 ```
@@ -246,16 +282,39 @@ Get the latest version using GO.
 go get -u github.com/moul/sshportal
 ```
 
+## portal alias (.ssh/config)
+
+Edit your `~/.ssh/config` file (create it first if needed)
+
+```ini
+Host portal
+  User      admin
+  Port      2222       # portal port
+  HostName  127.0.0.1  # portal hostname
+```
+
+```bash
+# you can now run a shell using this:
+ssh portal
+# instead of this:
+ssh localhost -p 2222 -l admin
+
+# or connect to hosts using this:
+ssh hostname@portal
+# instead of this:
+ssh localhost -p 2222 -l hostname
+```
+
 ## Backup / Restore
 
 sshportal embeds built-in backup/restore methods which basically import/export JSON objects:
 
 ```sh
 # Backup
-ssh admin@sshportal config backup  > sshportal.bkp
+ssh portal config backup  > sshportal.bkp
 
 # Restore
-ssh admin@sshportal config restore < sshportal.bkp
+ssh portal config restore < sshportal.bkp
 ```
 
 This method is particularly useful as it should be resistant against future DB schema changes (expected during development phase).
@@ -269,3 +328,90 @@ sqlite3 sshportal.db .dump > sshportal.sql.bkp
 # or just the immortal cp
 cp sshportal.db sshportal.db.bkp
 ```
+
+## Demo data
+
+The following servers are freely available, without external registration,
+it makes it easier to quickly test `sshportal` without configuring your own servers to accept sshportal connections.
+
+```
+ssh portal host create new@sdf.org
+ssh sdf@portal
+
+ssh portal host create test@whoami.filippo.io
+ssh whoami@portal
+
+ssh portal host create test@chat.shazow.net
+ssh chat@portal
+```
+
+## Healthcheck
+
+By default, `sshportal` will return `OK` to anyone sshing using the `healthcheck` user without checking for authentication.
+
+```console
+$ ssh healthcheck@sshportal
+OK
+$
+```
+
+the `healtcheck` user can be changed using the `healthcheck-user` option.
+
+---
+
+Alternatively, you can run the built-in healthcheck helper (requiring no ssh client nor ssh key):
+
+Usage: `sshportal healthcheck [--addr=host:port] [--wait] [--quiet]
+
+```console
+$ sshportal healthcheck --addr=localhost:2222; echo $?
+$ 0
+```
+
+---
+
+Wait for sshportal to be healthy, then connect
+
+```console
+$ sshportal healthcheck --wait && ssh sshportal -l admin
+config>
+```
+
+## Scaling
+
+`sshportal` is stateless but relies on a database to store configuration and logs.
+
+By default, `sshportal` uses a local [sqlite](https://www.sqlite.org/) database which isn't scalable by design.
+
+You can run multiple instances of `sshportal` sharing a same [MySQL](https://www.mysql.com) database, using `sshportal --db-conn=user:pass@host/dbname?parseTime=true --db-driver=mysql`.
+
+![sshportal cluster with MySQL backend](https://raw.github.com/moul/sshportal/master/.assets/cluster-mysql.svg?sanitize=true)
+
+See [examples/mysql](http://github.com/moul/sshportal/tree/master/examples/mysql).
+
+## Under the hood
+
+* Docker first (used in dev, tests, by the CI and in production)
+* Backed by (see [dep graph](https://godoc.org/github.com/moul/sshportal?import-graph&hide=2)):
+  * SSH
+    * https://github.com/gliderlabs/ssh: SSH server made easy (well-designed golang library to build SSH servers)
+    * https://godoc.org/golang.org/x/crypto/ssh: both client and server SSH protocol and helpers
+  * Database
+    * https://github.com/jinzhu/gorm/: SQL orm
+    * https://github.com/go-gormigrate/gormigrate: Database migration system
+  * Built-in shell
+    * https://github.com/olekukonko/tablewriter: Ascii tables
+    * https://github.com/asaskevich/govalidator: Valide user inputs
+    * https://github.com/dustin/go-humanize: Human-friendly representation of technical data (time ago, bytes, ...)
+    * https://github.com/mgutz/ansi: Terminal color helpers
+    * https://github.com/urfave/cli: CLI flag parsing with subcommands support
+
+![sshportal data model](https://raw.github.com/moul/sshportal/master/.assets/sql-schema.svg?sanitize=true)
+
+## Note
+
+This is totally experimental for now, so please file issues to let me know what you think about it!
+
+
+## License
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fmoul%2Fsshportal.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fmoul%2Fsshportal?ref=badge_large)

acl.go

@@ -26,11 +26,11 @@ func CheckACLs(user User, host Host) (string, error) {
 
 	// deny by default if no shared ACL
 	if len(aclMap) == 0 {
-		return "deny", nil // default action
+		return ACLActionDeny, nil // default action
 	}
 
-	// transofrm map to slice and sort it
-	acls := []*ACL{}
+	// transform map to slice and sort it
+	acls := make([]*ACL, 0, len(aclMap))
 	for _, acl := range aclMap {
 		acls = append(acls, acl)
 	}

acl_test.go

@@ -15,17 +15,21 @@ func TestCheckACLs(t *testing.T) {
 		// create tmp dir
 		tempDir, err := ioutil.TempDir("", "sshportal")
 		So(err, ShouldBeNil)
-		defer os.RemoveAll(tempDir)
+		defer func() {
+			So(os.RemoveAll(tempDir), ShouldBeNil)
+		}()
 
 		// create sqlite db
 		db, err := gorm.Open("sqlite3", filepath.Join(tempDir, "sshportal.db"))
+		So(err, ShouldBeNil)
 		db.LogMode(false)
 		So(dbInit(db), ShouldBeNil)
 
 		// create dummy objects
-		hostGroup, err := FindHostGroupByIdOrName(db, "default")
+		var hostGroup HostGroup
+		err = HostGroupsByIdentifiers(db, []string{"default"}).First(&hostGroup).Error
 		So(err, ShouldBeNil)
-		db.Create(&Host{Groups: []HostGroup{*hostGroup}})
+		db.Create(&Host{Groups: []*HostGroup{&hostGroup}})
 
 		//. load db
 		var (
@@ -38,6 +42,6 @@ func TestCheckACLs(t *testing.T) {
 		// test
 		action, err := CheckACLs(users[0], hosts[0])
 		So(err, ShouldBeNil)
-		So(action, ShouldEqual, "allow")
+		So(action, ShouldEqual, ACLActionAllow)
 	})
 }

config.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/urfave/cli"
+)
+
+type configServe struct {
+	aesKey          string
+	dbDriver, dbURL string
+	logsLocation    string
+	bindAddr        string
+	debug, demo     bool
+}
+
+func parseServeConfig(c *cli.Context) (*configServe, error) {
+	ret := &configServe{
+		aesKey:       c.String("aes-key"),
+		dbDriver:     c.String("db-driver"),
+		dbURL:        c.String("db-conn"),
+		bindAddr:     c.String("bind-address"),
+		debug:        c.Bool("debug"),
+		demo:         c.Bool("demo"),
+		logsLocation: c.String("logs-location"),
+	}
+	switch len(ret.aesKey) {
+	case 0, 16, 24, 32:
+	default:
+		return nil, fmt.Errorf("invalid aes key size, should be 16 or 24, 32")
+	}
+	return ret, nil
+}
+
+func ensureLogDirectory(location string) error {
+	// check for the logdir existence
+	logsLocation, err := os.Stat(location)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return os.MkdirAll(location, os.ModeDir|os.FileMode(0750))
+		}
+		return err
+	}
+	if !logsLocation.IsDir() {
+		return fmt.Errorf("log directory cannot be created")
+	}
+	return nil
+}

crypto.go

@@ -2,11 +2,16 @@ package main
 
 import (
 	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
 	"crypto/rand"
 	"crypto/rsa"
 	"crypto/x509"
+	"encoding/base64"
 	"encoding/pem"
+	"errors"
 	"fmt"
+	"io"
 	"strings"
 
 	gossh "golang.org/x/crypto/ssh"
@@ -47,3 +52,114 @@ func NewSSHKey(keyType string, length uint) (*SSHKey, error) {
 
 	return &key, nil
 }
+
+func ImportSSHKey(keyValue string) (*SSHKey, error) {
+	key := SSHKey{
+		Type: "rsa",
+	}
+
+	parsedKey, err := gossh.ParseRawPrivateKey([]byte(keyValue))
+	if err != nil {
+		return nil, err
+	}
+	var privateKey *rsa.PrivateKey
+	var ok bool
+	if privateKey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, errors.New("key type not supported")
+	}
+	key.Length = uint(privateKey.PublicKey.N.BitLen())
+	// convert priv key to x509 format
+	var pemKey = &pem.Block{
+		Type:  "RSA PRIVATE KEY",
+		Bytes: x509.MarshalPKCS1PrivateKey(privateKey),
+	}
+	buf := bytes.NewBufferString("")
+	if err = pem.Encode(buf, pemKey); err != nil {
+		return nil, err
+	}
+	key.PrivKey = buf.String()
+
+	// generte authorized-key formatted pubkey output
+	pub, err := gossh.NewPublicKey(&privateKey.PublicKey)
+	if err != nil {
+		return nil, err
+	}
+	key.PubKey = strings.TrimSpace(string(gossh.MarshalAuthorizedKey(pub)))
+
+	return &key, nil
+}
+
+func encrypt(key []byte, text string) (string, error) {
+	plaintext := []byte(text)
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+	ciphertext := make([]byte, aes.BlockSize+len(plaintext))
+	iv := ciphertext[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		return "", err
+	}
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(ciphertext[aes.BlockSize:], plaintext)
+	return base64.URLEncoding.EncodeToString(ciphertext), nil
+}
+
+func decrypt(key []byte, cryptoText string) (string, error) {
+	ciphertext, _ := base64.URLEncoding.DecodeString(cryptoText)
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+	if len(ciphertext) < aes.BlockSize {
+		return "", fmt.Errorf("ciphertext too short")
+	}
+	iv := ciphertext[:aes.BlockSize]
+	ciphertext = ciphertext[aes.BlockSize:]
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(ciphertext, ciphertext)
+	return fmt.Sprintf("%s", ciphertext), nil
+}
+
+func safeDecrypt(key []byte, cryptoText string) string {
+	if len(key) == 0 {
+		return cryptoText
+	}
+	out, err := decrypt(key, cryptoText)
+	if err != nil {
+		return cryptoText
+	}
+	return out
+}
+
+func HostEncrypt(aesKey string, host *Host) (err error) {
+	if aesKey == "" {
+		return nil
+	}
+	if host.Password != "" {
+		host.Password, err = encrypt([]byte(aesKey), host.Password)
+	}
+	return
+}
+func HostDecrypt(aesKey string, host *Host) {
+	if aesKey == "" {
+		return
+	}
+	if host.Password != "" {
+		host.Password = safeDecrypt([]byte(aesKey), host.Password)
+	}
+}
+
+func SSHKeyEncrypt(aesKey string, key *SSHKey) (err error) {
+	if aesKey == "" {
+		return nil
+	}
+	key.PrivKey, err = encrypt([]byte(aesKey), key.PrivKey)
+	return
+}
+func SSHKeyDecrypt(aesKey string, key *SSHKey) {
+	if aesKey == "" {
+		return
+	}
+	key.PrivKey = safeDecrypt([]byte(aesKey), key.PrivKey)
+}

db.go

@@ -1,15 +1,18 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
+	"log"
 	"net/url"
 	"regexp"
+	"strconv"
 	"strings"
 	"time"
 
 	"github.com/asaskevich/govalidator"
-	"github.com/gliderlabs/ssh"
 	"github.com/jinzhu/gorm"
+	gossh "golang.org/x/crypto/ssh"
 )
 
 type Config struct {
@@ -21,7 +24,10 @@ type Config struct {
 	HostGroups []*HostGroup `json:"host_groups"`
 	ACLs       []*ACL       `json:"acls"`
 	Settings   []*Setting   `json:"settings"`
-	Date       time.Time    `json:"date"`
+	Events     []*Event     `json:"events"`
+	Sessions   []*Session   `json:"sessions"`
+	// FIXME: add latest migration
+	Date time.Time `json:"date"`
 }
 
 type Setting struct {
@@ -30,6 +36,7 @@ type Setting struct {
 	Value string `valid:"required"`
 }
 
+// SSHKey defines a ssh client key (used by sshportal to connect to remote hosts)
 type SSHKey struct {
 	// FIXME: use uuid for ID
 	gorm.Model
@@ -46,23 +53,28 @@ type SSHKey struct {
 type Host struct {
 	// FIXME: use uuid for ID
 	gorm.Model
-	Name        string       `gorm:"size:32" valid:"required,length(1|32),unix_user"`
-	Addr        string       `valid:"required"`
-	User        string       `valid:"optional"`
-	Password    string       `valid:"optional"`
-	SSHKey      *SSHKey      `gorm:"ForeignKey:SSHKeyID"`
-	SSHKeyID    uint         `gorm:"index"`
-	Groups      []*HostGroup `gorm:"many2many:host_host_groups;"`
-	Fingerprint string       `valid:"optional"` // FIXME: replace with hostKey ?
-	Comment     string       `valid:"optional"`
+	Name     string       `gorm:"size:32" valid:"required,length(1|32),unix_user"`
+	Addr     string       `valid:"optional"` // FIXME: to be removed in a future version in favor of URL
+	User     string       `valid:"optional"` // FIXME: to be removed in a future version in favor of URL
+	Password string       `valid:"optional"` // FIXME: to be removed in a future version in favor of URL
+	URL      string       `valid:"optional"`
+	SSHKey   *SSHKey      `gorm:"ForeignKey:SSHKeyID"` // SSHKey used to connect by the client
+	SSHKeyID uint         `gorm:"index"`
+	HostKey  []byte       `sql:"size:10000" valid:"optional"`
+	Groups   []*HostGroup `gorm:"many2many:host_host_groups;"`
+	Comment  string       `valid:"optional"`
+	Hop      *Host
+	HopID    uint
 }
 
+// UserKey defines a user public key used by sshportal to identify the user
 type UserKey struct {
 	gorm.Model
-	Key     []byte `sql:"size:10000" valid:"required,length(1|10000)"`
-	UserID  uint   ``
-	User    *User  `gorm:"ForeignKey:UserID"`
-	Comment string `valid:"optional"`
+	Key           []byte `sql:"size:10000" valid:"required,length(1|10000)"`
+	AuthorizedKey string `sql:"size:10000" valid:"required,length(1|10000)"`
+	UserID        uint   ``
+	User          *User  `gorm:"ForeignKey:UserID"`
+	Comment       string `valid:"optional"`
 }
 
 type UserRole struct {
@@ -109,6 +121,52 @@ type ACL struct {
 	Comment     string       `valid:"optional"`
 }
 
+type Session struct {
+	gorm.Model
+	StoppedAt *time.Time `sql:"index" valid:"optional"`
+	Status    string     `valid:"required"`
+	User      *User      `gorm:"ForeignKey:UserID"`
+	Host      *Host      `gorm:"ForeignKey:HostID"`
+	UserID    uint       `valid:"optional"`
+	HostID    uint       `valid:"optional"`
+	ErrMsg    string     `valid:"optional"`
+	Comment   string     `valid:"optional"`
+}
+
+type Event struct {
+	gorm.Model
+	Author   *User                  `gorm:"ForeignKey:AuthorID"`
+	AuthorID uint                   `valid:"optional"`
+	Domain   string                 `valid:"required"`
+	Action   string                 `valid:"required"`
+	Entity   string                 `valid:"optional"`
+	Args     []byte                 `sql:"size:10000" valid:"optional,length(1|10000)" json:"-"`
+	ArgsMap  map[string]interface{} `gorm:"-" json:"Args"`
+}
+
+type SessionStatus string
+
+const (
+	SessionStatusUnknown SessionStatus = "unknown"
+	SessionStatusActive                = "active"
+	SessionStatusClosed                = "closed"
+)
+
+type ACLAction string
+
+const (
+	ACLActionUnknown ACLAction = "unknown"
+	ACLActionAllow             = "allow"
+	ACLActionDeny              = "deny"
+)
+
+type BastionScheme string
+
+const (
+	BastionSchemeSSH    BastionScheme = "ssh"
+	BastionSchemeTelnet               = "telnet"
+)
+
 func init() {
 	unixUserRegexp := regexp.MustCompile("[a-z_][a-z0-9_-]*")
 
@@ -121,54 +179,153 @@ func init() {
 	}))
 }
 
-func RemoteHostFromSession(s ssh.Session, db *gorm.DB) (*Host, error) {
-	var host Host
-	db.Preload("SSHKey").Where("name = ?", s.User()).Find(&host)
-	if host.Name == "" {
-		// FIXME: add available hosts
-		return nil, fmt.Errorf("No such target: %q", s.User())
-	}
-	return &host, nil
-}
+// Host helpers
 
-func (host *Host) URL() string {
-	return fmt.Sprintf("%s@%s", host.User, host.Addr)
-}
-
-func NewHostFromURL(rawurl string) (*Host, error) {
-	if !strings.Contains(rawurl, "://") {
-		rawurl = "ssh://" + rawurl
+func ParseInputURL(input string) (*url.URL, error) {
+	if !strings.Contains(input, "://") {
+		input = "ssh://" + input
 	}
-	u, err := url.Parse(rawurl)
+	u, err := url.Parse(input)
 	if err != nil {
 		return nil, err
 	}
-	host := Host{Addr: u.Host}
-	if !strings.Contains(host.Addr, ":") {
-		host.Addr += ":22" // add port if not present
-	}
-	host.User = "root" // default username
-	if u.User != nil {
-		password, _ := u.User.Password()
-		host.Password = password
-		host.User = u.User.Username()
-	}
-	return &host, nil
+	return u, nil
+}
+func (host *Host) DialAddr() string {
+	return fmt.Sprintf("%s:%d", host.Hostname(), host.Port())
+}
+func (host *Host) String() string {
+	if host.URL != "" {
+		return host.URL
+	} else if host.Addr != "" { // to be removed in a future version in favor of URL
+		if host.Password != "" {
+			return fmt.Sprintf("ssh://%s:%s@%s", host.User, strings.Repeat("*", 4), host.Addr)
+		}
+		return fmt.Sprintf("ssh://%s@%s", host.User, host.Addr)
+	}
+	return ""
+}
+func (host *Host) Scheme() BastionScheme {
+	if host.URL != "" {
+		u, err := url.Parse(host.URL)
+		if err != nil {
+			return BastionSchemeSSH
+		}
+		return BastionScheme(u.Scheme)
+	} else if host.Addr != "" {
+		return BastionSchemeSSH
+	}
+	return ""
 }
-
 func (host *Host) Hostname() string {
-	return strings.Split(host.Addr, ":")[0]
+	if host.URL != "" {
+		u, err := url.Parse(host.URL)
+		if err != nil {
+			return ""
+		}
+		return u.Hostname()
+	} else if host.Addr != "" { // to be removed in a future version in favor of URL
+		return strings.Split(host.Addr, ":")[0]
+	}
+	return ""
+}
+func (host *Host) Username() string {
+	if host.URL != "" {
+		u, err := url.Parse(host.URL)
+		if err != nil {
+			return "root"
+		}
+		if u.User != nil {
+			return u.User.Username()
+		}
+	} else if host.User != "" { // to be removed in a future version in favor of URL
+		return host.User
+	}
+	return "root"
+}
+func (host *Host) Passwd() string {
+	if host.URL != "" {
+		u, err := url.Parse(host.URL)
+		if err != nil {
+			return ""
+		}
+		if u.User != nil {
+			password, _ := u.User.Password()
+			return password
+		}
+	} else if host.Password != "" { // to be removed in a future version in favor of URL
+		return host.Password
+	}
+	return ""
+}
+func (host *Host) Port() uint64 {
+	var portString string
+	if host.URL != "" {
+		u, err := url.Parse(host.URL)
+		if err != nil {
+			goto defaultPort
+		}
+		portString = u.Port()
+	} else if host.Addr != "" { // to be removed in a future version in favor of URL
+		portString = strings.Split(host.Addr, ":")[1]
+	}
+	if portString != "" {
+		port, err := strconv.ParseUint(portString, 10, 64)
+		if err != nil {
+			goto defaultPort
+		}
+		return port
+	}
+defaultPort:
+	switch host.Scheme() {
+	case BastionSchemeSSH:
+		return 22
+	case BastionSchemeTelnet:
+		return 23
+	default:
+		return 0
+	}
 }
-
-// Host helpers
 func HostsPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("Groups").Preload("SSHKey")
 }
 func HostsByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 	return db.Where("id IN (?)", identifiers).Or("name IN (?)", identifiers)
 }
+func HostByName(db *gorm.DB, name string) (*Host, error) {
+	var host Host
+	db.Preload("SSHKey").Where("name = ?", name).Find(&host)
+	if host.Name == "" {
+		// FIXME: add available hosts
+		return nil, fmt.Errorf("No such target: %q", name)
+	}
+	return &host, nil
+}
+
+func (host *Host) clientConfig(hk gossh.HostKeyCallback) (*gossh.ClientConfig, error) {
+	config := gossh.ClientConfig{
+		User:            host.Username(),
+		HostKeyCallback: hk,
+		Auth:            []gossh.AuthMethod{},
+	}
+	if host.SSHKey != nil {
+		signer, err := gossh.ParsePrivateKey([]byte(host.SSHKey.PrivKey))
+		if err != nil {
+			return nil, err
+		}
+		config.Auth = append(config.Auth, gossh.PublicKeys(signer))
+	}
+	if host.Passwd() != "" {
+		config.Auth = append(config.Auth, gossh.Password(host.Passwd()))
+	}
+	if len(config.Auth) == 0 {
+		return nil, fmt.Errorf("no valid authentication method for host %q", host.Name)
+	}
+	return &config, nil
+}
 
 // SSHKey helpers
+
 func SSHKeysPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("Hosts")
 }
@@ -177,6 +334,7 @@ func SSHKeysByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 }
 
 // HostGroup helpers
+
 func HostGroupsPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("ACLs").Preload("Hosts")
 }
@@ -184,7 +342,8 @@ func HostGroupsByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 	return db.Where("id IN (?)", identifiers).Or("name IN (?)", identifiers)
 }
 
-// UserGroup heleprs
+// UserGroup helpers
+
 func UserGroupsPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("ACLs").Preload("Users")
 }
@@ -193,35 +352,32 @@ func UserGroupsByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 }
 
 // User helpers
+
 func UsersPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("Groups").Preload("Keys").Preload("Roles")
 }
 func UsersByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 	return db.Where("id IN (?)", identifiers).Or("email IN (?)", identifiers).Or("name IN (?)", identifiers)
 }
-func UserHasRole(user User, name string) bool {
-	for _, role := range user.Roles {
+func (u *User) HasRole(name string) bool {
+	for _, role := range u.Roles {
 		if role.Name == name {
 			return true
 		}
 	}
 	return false
 }
-func UserCheckRoles(user User, names []string) error {
-	ok := false
+func (u *User) CheckRoles(names []string) error {
 	for _, name := range names {
-		if UserHasRole(user, name) {
-			ok = true
-			break
+		if u.HasRole(name) {
+			return nil
 		}
 	}
-	if ok {
-		return nil
-	}
 	return fmt.Errorf("you don't have permission to access this feature (requires any of these roles: '%s')", strings.Join(names, "', '"))
 }
 
 // ACL helpers
+
 func ACLsPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("UserGroups").Preload("HostGroups")
 }
@@ -230,6 +386,7 @@ func ACLsByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 }
 
 // UserKey helpers
+
 func UserKeysPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("User")
 }
@@ -238,9 +395,64 @@ func UserKeysByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 }
 
 // UserRole helpers
+
 func UserRolesPreload(db *gorm.DB) *gorm.DB {
 	return db.Preload("Users")
 }
 func UserRolesByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
 	return db.Where("id IN (?)", identifiers).Or("name IN (?)", identifiers)
 }
+
+// Session helpers
+
+func SessionsPreload(db *gorm.DB) *gorm.DB {
+	return db.Preload("User").Preload("Host")
+}
+func SessionsByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
+	return db.Where("id IN (?)", identifiers)
+}
+
+// Events helpers
+
+func EventsPreload(db *gorm.DB) *gorm.DB {
+	return db.Preload("Author")
+}
+func EventsByIdentifiers(db *gorm.DB, identifiers []string) *gorm.DB {
+	return db.Where("id IN (?)", identifiers)
+}
+
+func NewEvent(domain, action string) *Event {
+	return &Event{
+		Domain:  domain,
+		Action:  action,
+		ArgsMap: map[string]interface{}{},
+	}
+}
+
+func (e *Event) String() string {
+	return fmt.Sprintf("%s %s %s %s", e.Domain, e.Action, e.Entity, string(e.Args))
+}
+
+func (e *Event) Log(db *gorm.DB) {
+	if len(e.ArgsMap) > 0 {
+		var err error
+		if e.Args, err = json.Marshal(e.ArgsMap); err != nil {
+			log.Printf("error: %v", err)
+		}
+	}
+	log.Printf("info: %s", e)
+	if err := db.Create(e).Error; err != nil {
+		log.Printf("warning: %v", err)
+	}
+}
+
+func (e *Event) SetAuthor(user *User) *Event {
+	e.Author = user
+	e.AuthorID = user.ID
+	return e
+}
+
+func (e *Event) SetArg(name string, value interface{}) *Event {
+	e.ArgsMap[name] = value
+	return e
+}

dbinit.go

@@ -2,14 +2,23 @@ package main
 
 import (
 	"fmt"
+	"io/ioutil"
 	"log"
 	"os"
+	"os/user"
+	"strings"
+	"time"
 
 	"github.com/go-gormigrate/gormigrate"
 	"github.com/jinzhu/gorm"
+	gossh "golang.org/x/crypto/ssh"
 )
 
 func dbInit(db *gorm.DB) error {
+	log.SetOutput(ioutil.Discard)
+	db.Callback().Delete().Replace("gorm:delete", hardDeleteCallback)
+	log.SetOutput(os.Stderr)
+
 	m := gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
 		{
 			ID: "1",
@@ -24,8 +33,7 @@ func dbInit(db *gorm.DB) error {
 			Rollback: func(tx *gorm.DB) error {
 				return tx.DropTable("settings").Error
 			},
-		},
-		{
+		}, {
 			ID: "2",
 			Migrate: func(tx *gorm.DB) error {
 				type SSHKey struct {
@@ -152,7 +160,7 @@ func dbInit(db *gorm.DB) error {
 			ID: "9",
 			Migrate: func(tx *gorm.DB) error {
 				db.Model(&Setting{}).RemoveIndex("uix_settings_name")
-				return db.Model(&Setting{}).Where(`"deleted_at" IS NULL`).AddUniqueIndex("uix_settings_name", "name").Error
+				return db.Model(&Setting{}).AddUniqueIndex("uix_settings_name", "name").Error
 			},
 			Rollback: func(tx *gorm.DB) error {
 				return db.Model(&Setting{}).RemoveIndex("uix_settings_name").Error
@@ -161,7 +169,7 @@ func dbInit(db *gorm.DB) error {
 			ID: "10",
 			Migrate: func(tx *gorm.DB) error {
 				db.Model(&SSHKey{}).RemoveIndex("uix_keys_name")
-				return db.Model(&SSHKey{}).Where(`"deleted_at" IS NULL`).AddUniqueIndex("uix_keys_name", "name").Error
+				return db.Model(&SSHKey{}).AddUniqueIndex("uix_keys_name", "name").Error
 			},
 			Rollback: func(tx *gorm.DB) error {
 				return db.Model(&SSHKey{}).RemoveIndex("uix_keys_name").Error
@@ -170,7 +178,7 @@ func dbInit(db *gorm.DB) error {
 			ID: "11",
 			Migrate: func(tx *gorm.DB) error {
 				db.Model(&Host{}).RemoveIndex("uix_hosts_name")
-				return db.Model(&Host{}).Where(`"deleted_at" IS NULL`).AddUniqueIndex("uix_hosts_name", "name").Error
+				return db.Model(&Host{}).AddUniqueIndex("uix_hosts_name", "name").Error
 			},
 			Rollback: func(tx *gorm.DB) error {
 				return db.Model(&Host{}).RemoveIndex("uix_hosts_name").Error
@@ -179,7 +187,7 @@ func dbInit(db *gorm.DB) error {
 			ID: "12",
 			Migrate: func(tx *gorm.DB) error {
 				db.Model(&User{}).RemoveIndex("uix_users_name")
-				return db.Model(&User{}).Where(`"deleted_at" IS NULL`).AddUniqueIndex("uix_users_name", "name").Error
+				return db.Model(&User{}).AddUniqueIndex("uix_users_name", "name").Error
 			},
 			Rollback: func(tx *gorm.DB) error {
 				return db.Model(&User{}).RemoveIndex("uix_users_name").Error
@@ -188,7 +196,7 @@ func dbInit(db *gorm.DB) error {
 			ID: "13",
 			Migrate: func(tx *gorm.DB) error {
 				db.Model(&UserGroup{}).RemoveIndex("uix_usergroups_name")
-				return db.Model(&UserGroup{}).Where(`"deleted_at" IS NULL`).AddUniqueIndex("uix_usergroups_name", "name").Error
+				return db.Model(&UserGroup{}).AddUniqueIndex("uix_usergroups_name", "name").Error
 			},
 			Rollback: func(tx *gorm.DB) error {
 				return db.Model(&UserGroup{}).RemoveIndex("uix_usergroups_name").Error
@@ -197,7 +205,7 @@ func dbInit(db *gorm.DB) error {
 			ID: "14",
 			Migrate: func(tx *gorm.DB) error {
 				db.Model(&HostGroup{}).RemoveIndex("uix_hostgroups_name")
-				return db.Model(&HostGroup{}).Where(`"deleted_at" IS NULL`).AddUniqueIndex("uix_hostgroups_name", "name").Error
+				return db.Model(&HostGroup{}).AddUniqueIndex("uix_hostgroups_name", "name").Error
 			},
 			Rollback: func(tx *gorm.DB) error {
 				return db.Model(&HostGroup{}).RemoveIndex("uix_hostgroups_name").Error
@@ -292,11 +300,194 @@ func dbInit(db *gorm.DB) error {
 			Rollback: func(tx *gorm.DB) error {
 				return tx.Where("name = ?", "listhosts").Delete(&UserRole{}).Error
 			},
+		}, {
+			ID: "21",
+			Migrate: func(tx *gorm.DB) error {
+				type Session struct {
+					gorm.Model
+					StoppedAt time.Time `valid:"optional"`
+					Status    string    `valid:"required"`
+					User      *User     `gorm:"ForeignKey:UserID"`
+					Host      *Host     `gorm:"ForeignKey:HostID"`
+					UserID    uint      `valid:"optional"`
+					HostID    uint      `valid:"optional"`
+					ErrMsg    string    `valid:"optional"`
+					Comment   string    `valid:"optional"`
+				}
+				return tx.AutoMigrate(&Session{}).Error
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return tx.DropTable("sessions").Error
+			},
+		}, {
+			ID: "22",
+			Migrate: func(tx *gorm.DB) error {
+				type Event struct {
+					gorm.Model
+					Author   *User  `gorm:"ForeignKey:AuthorID"`
+					AuthorID uint   `valid:"optional"`
+					Domain   string `valid:"required"`
+					Action   string `valid:"required"`
+					Entity   string `valid:"optional"`
+					Args     []byte `sql:"size:10000" valid:"optional,length(1|10000)"`
+				}
+				return tx.AutoMigrate(&Event{}).Error
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return tx.DropTable("events").Error
+			},
+		}, {
+			ID: "23",
+			Migrate: func(tx *gorm.DB) error {
+				type UserKey struct {
+					gorm.Model
+					Key           []byte `sql:"size:10000" valid:"required,length(1|10000)"`
+					AuthorizedKey string `sql:"size:10000" valid:"required,length(1|10000)"`
+					UserID        uint   ``
+					User          *User  `gorm:"ForeignKey:UserID"`
+					Comment       string `valid:"optional"`
+				}
+				return tx.AutoMigrate(&UserKey{}).Error
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return fmt.Errorf("not implemented")
+			},
+		}, {
+			ID: "24",
+			Migrate: func(tx *gorm.DB) error {
+				var userKeys []UserKey
+				if err := db.Find(&userKeys).Error; err != nil {
+					return err
+				}
+
+				for _, userKey := range userKeys {
+					key, err := gossh.ParsePublicKey(userKey.Key)
+					if err != nil {
+						return err
+					}
+					userKey.AuthorizedKey = string(gossh.MarshalAuthorizedKey(key))
+					if err := db.Model(&userKey).Updates(&userKey).Error; err != nil {
+						return err
+					}
+				}
+				return nil
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return fmt.Errorf("not implemented")
+			},
+		}, {
+			ID: "25",
+			Migrate: func(tx *gorm.DB) error {
+				type Host struct {
+					// FIXME: use uuid for ID
+					gorm.Model
+					Name        string       `gorm:"size:32" valid:"required,length(1|32),unix_user"`
+					Addr        string       `valid:"required"`
+					User        string       `valid:"optional"`
+					Password    string       `valid:"optional"`
+					SSHKey      *SSHKey      `gorm:"ForeignKey:SSHKeyID"` // SSHKey used to connect by the client
+					SSHKeyID    uint         `gorm:"index"`
+					HostKey     []byte       `sql:"size:10000" valid:"optional"`
+					Groups      []*HostGroup `gorm:"many2many:host_host_groups;"`
+					Fingerprint string       `valid:"optional"` // FIXME: replace with hostKey ?
+					Comment     string       `valid:"optional"`
+				}
+				return tx.AutoMigrate(&Host{}).Error
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return fmt.Errorf("not implemented")
+			},
+		}, {
+			ID: "26",
+			Migrate: func(tx *gorm.DB) error {
+				type Session struct {
+					gorm.Model
+					StoppedAt *time.Time `sql:"index" valid:"optional"`
+					Status    string     `valid:"required"`
+					User      *User      `gorm:"ForeignKey:UserID"`
+					Host      *Host      `gorm:"ForeignKey:HostID"`
+					UserID    uint       `valid:"optional"`
+					HostID    uint       `valid:"optional"`
+					ErrMsg    string     `valid:"optional"`
+					Comment   string     `valid:"optional"`
+				}
+				return tx.AutoMigrate(&Session{}).Error
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return fmt.Errorf("not implemented")
+			},
+		}, {
+			ID: "27",
+			Migrate: func(tx *gorm.DB) error {
+				var sessions []Session
+				if err := db.Find(&sessions).Error; err != nil {
+					return err
+				}
+
+				for _, session := range sessions {
+					if session.StoppedAt != nil && session.StoppedAt.IsZero() {
+						if err := db.Model(&session).Updates(map[string]interface{}{"stopped_at": nil}).Error; err != nil {
+							return err
+						}
+					}
+				}
+				return nil
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return fmt.Errorf("not implemented")
+			},
+		}, {
+			ID: "28",
+			Migrate: func(tx *gorm.DB) error {
+				type Host struct {
+					// FIXME: use uuid for ID
+					gorm.Model
+					Name     string `gorm:"size:32"`
+					Addr     string
+					User     string
+					Password string
+					URL      string
+					SSHKey   *SSHKey      `gorm:"ForeignKey:SSHKeyID"`
+					SSHKeyID uint         `gorm:"index"`
+					HostKey  []byte       `sql:"size:10000"`
+					Groups   []*HostGroup `gorm:"many2many:host_host_groups;"`
+					Comment  string
+				}
+				return tx.AutoMigrate(&Host{}).Error
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return fmt.Errorf("not implemented")
+			},
+		}, {
+			ID: "29",
+			Migrate: func(tx *gorm.DB) error {
+				type Host struct {
+					// FIXME: use uuid for ID
+					gorm.Model
+					Name     string `gorm:"size:32"`
+					Addr     string
+					User     string
+					Password string
+					URL      string
+					SSHKey   *SSHKey      `gorm:"ForeignKey:SSHKeyID"`
+					SSHKeyID uint         `gorm:"index"`
+					HostKey  []byte       `sql:"size:10000"`
+					Groups   []*HostGroup `gorm:"many2many:host_host_groups;"`
+					Comment  string
+					Hop      *Host
+					HopID    uint
+				}
+				return tx.AutoMigrate(&Host{}).Error
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return fmt.Errorf("not implemented")
+			},
 		},
 	})
 	if err := m.Migrate(); err != nil {
 		return err
 	}
+	NewEvent("system", "migrated").Log(db)
 
 	// create default ssh key
 	var count uint
@@ -368,10 +559,12 @@ func dbInit(db *gorm.DB) error {
 	// create admin user
 	var defaultUserGroup UserGroup
 	db.Where("name = ?", "default").First(&defaultUserGroup)
-	db.Table("users").Count(&count)
+	if err := db.Table("users").Count(&count).Error; err != nil {
+		return err
+	}
 	if count == 0 {
 		// if no admin, create an account for the first connection
-		inviteToken := RandStringBytes(16)
+		inviteToken := randStringBytes(16)
 		if os.Getenv("SSHPORTAL_DEFAULT_ADMIN_INVITE_TOKEN") != "" {
 			inviteToken = os.Getenv("SSHPORTAL_DEFAULT_ADMIN_INVITE_TOKEN")
 		}
@@ -379,9 +572,20 @@ func dbInit(db *gorm.DB) error {
 		if err := db.Where("name = ?", "admin").First(&adminRole).Error; err != nil {
 			return err
 		}
+		var username string
+		if currentUser, err := user.Current(); err == nil {
+			username = currentUser.Username
+		}
+		if username == "" {
+			username = os.Getenv("USER")
+		}
+		username = strings.ToLower(username)
+		if username == "" {
+			username = "admin" // fallback username
+		}
 		user := User{
-			Name:        "Administrator",
-			Email:       "admin@sshportal",
+			Name:        username,
+			Email:       fmt.Sprintf("%s@localhost", username),
 			Comment:     "created by sshportal",
 			Roles:       []*UserRole{&adminRole},
 			InviteToken: inviteToken,
@@ -390,7 +594,7 @@ func dbInit(db *gorm.DB) error {
 		if err := db.Create(&user).Error; err != nil {
 			return err
 		}
-		log.Printf("Admin user created, use the user 'invite:%s' to associate a public key with this account", user.InviteToken)
+		log.Printf("info 'admin' user created, use the user 'invite:%s' to associate a public key with this account", user.InviteToken)
 	}
 
 	// create host ssh key
@@ -408,29 +612,34 @@ func dbInit(db *gorm.DB) error {
 			return err
 		}
 	}
-	return nil
+
+	// close unclosed connections
+	return db.Table("sessions").Where("status = ?", "active").Updates(&Session{
+		Status: SessionStatusClosed,
+		ErrMsg: "sshportal was halted while the connection was still active",
+	}).Error
 }
 
-func dbDemo(db *gorm.DB) error {
-	var hostGroup HostGroup
-	if err := HostGroupsByIdentifiers(db, []string{"default"}).First(&hostGroup).Error; err != nil {
-		return err
+func hardDeleteCallback(scope *gorm.Scope) {
+	if !scope.HasError() {
+		var extraOption string
+		if str, ok := scope.Get("gorm:delete_option"); ok {
+			extraOption = fmt.Sprint(str)
+		}
+
+		/* #nosec */
+		scope.Raw(fmt.Sprintf(
+			"DELETE FROM %v%v%v",
+			scope.QuotedTableName(),
+			addExtraSpaceIfExist(scope.CombinedConditionSql()),
+			addExtraSpaceIfExist(extraOption),
+		)).Exec()
 	}
-
-	var key SSHKey
-	if err := SSHKeysByIdentifiers(db, []string{"default"}).First(&key).Error; err != nil {
-		return err
-	}
-
-	var (
-		host1 = Host{Name: "sdf", Addr: "sdf.org:22", User: "new", SSHKeyID: key.ID, Groups: []*HostGroup{&hostGroup}}
-		host2 = Host{Name: "whoami", Addr: "whoami.filippo.io:22", User: "test", SSHKeyID: key.ID, Groups: []*HostGroup{&hostGroup}}
-		host3 = Host{Name: "ssh-chat", Addr: "chat.shazow.net:22", User: "test", SSHKeyID: key.ID, Fingerprint: "MD5:e5:d5:d1:75:90:38:42:f6:c7:03:d7:d0:56:7d:6a:db", Groups: []*HostGroup{&hostGroup}}
-	)
-
-	// FIXME: check if hosts exist to avoid `UNIQUE constraint` error
-	db.FirstOrCreate(&host1)
-	db.FirstOrCreate(&host2)
-	db.FirstOrCreate(&host3)
-	return nil
+}
+
+func addExtraSpaceIfExist(str string) string {
+	if str != "" {
+		return " " + str
+	}
+	return ""
 }

examples/homebrew/sshportal.rb

@@ -0,0 +1,24 @@
+require "language/go"
+
+class Sshportal < Formula
+  desc "sshportal: simple, fun and transparent SSH bastion"
+  homepage "https://github.com/moul/sshportal"
+  url "https://github.com/moul/sshportal/archive/v1.7.1.tar.gz"
+  sha256 "4611ae2f30cc595b2fb789bd0c92550533db6d4b63c638dd78cf85517b6aeaf0"
+  head "https://github.com/moul/sshportal.git"
+
+  depends_on "go" => :build
+
+  def install
+    ENV["GOPATH"] = buildpath
+    ENV["GOBIN"] = buildpath
+    (buildpath/"src/github.com/moul/sshportal").install Dir["*"]
+
+    system "go", "build", "-o", "#{bin}/sshportal", "-v", "github.com/moul/sshportal"
+  end
+
+  test do
+    output = shell_output(bin/"sshportal --version")
+    assert output.include? "sshportal version "
+  end
+end

examples/integration/Dockerfile

@@ -0,0 +1,4 @@
+FROM            occitech/ssh-client
+ENTRYPOINT      ["/bin/sh", "-c"]
+CMD             ["/integration/_client.sh"]
+COPY            . /integration

examples/integration/Makefile

@@ -0,0 +1,7 @@
+run:
+	docker-compose down
+	docker-compose up -d sshportal
+	docker-compose build client
+	docker-compose exec sshportal /bin/sshportal healthcheck --wait --quiet
+	docker-compose run client /integration/_client.sh
+	docker-compose down

examples/integration/_client.sh

@@ -0,0 +1,75 @@
+#!/bin/sh -e
+
+mkdir -p ~/.ssh
+cp /integration/client_test_rsa ~/.ssh/id_rsa
+chmod -R 700 ~/.ssh
+cat >~/.ssh/config <<EOF
+Host sshportal
+    Port 2222
+    HostName sshportal
+
+Host testserver
+    Port 2222
+    HostName testserver
+
+Host *
+    StrictHostKeyChecking no
+    ControlMaster auto
+    SendEnv TEST_*
+
+EOF
+
+set -x
+
+# login
+ssh sshportal -l invite:integration
+
+# hostgroup/usergroup/acl
+ssh sshportal -l admin hostgroup create
+ssh sshportal -l admin hostgroup create --name=hg1
+ssh sshportal -l admin hostgroup create --name=hg2 --comment=test
+ssh sshportal -l admin usergroup inspect hg1 hg2
+ssh sshportal -l admin hostgroup ls
+
+ssh sshportal -l admin usergroup create
+ssh sshportal -l admin usergroup create --name=ug1
+ssh sshportal -l admin usergroup create --name=ug2 --comment=test
+ssh sshportal -l admin usergroup inspect ug1 ug2
+ssh sshportal -l admin usergroup ls
+
+ssh sshportal -l admin acl create --ug=ug1 --ug=ug2 --hg=hg1 --hg=hg2 --comment=test --action=allow --weight=42
+ssh sshportal -l admin acl inspect 2
+ssh sshportal -l admin acl ls
+
+# basic host create
+ssh sshportal -l admin host create bob@example.org:1234
+ssh sshportal -l admin host create test42
+ssh sshportal -l admin host create --name=testtest --comment=test --password=test test@test.test
+ssh sshportal -l admin host create --group=hg1 --group=hg2 hostwithgroups.org
+ssh sshportal -l admin host inspect example test42 testtest hostwithgroups
+ssh sshportal -l admin host update --assign-group=hg1 test42
+ssh sshportal -l admin host update --unassign-group=hg1 test42
+ssh sshportal -l admin host update --assign-group=hg1 test42
+ssh sshportal -l admin host update --assign-group=hg2 --unassign-group=hg2 test42
+ssh sshportal -l admin host ls
+
+# backup/restore
+ssh sshportal -l admin config backup --indent --ignore-events > backup-1
+ssh sshportal -l admin config restore --confirm < backup-1
+ssh sshportal -l admin config backup --indent --ignore-events  > backup-2
+(
+    cat backup-1 | grep -v '"date":' | grep -v 'tedAt":' > backup-1.clean
+    cat backup-2 | grep -v '"date":' | grep -v 'tedAt":' > backup-2.clean
+    set -xe
+    diff backup-1.clean backup-2.clean
+)
+
+# bastion
+ssh sshportal -l admin host create --name=testserver toto@testserver:2222
+out="$(ssh sshportal -l testserver echo hello | head -n 1)"
+test "$out" = '{"User":"toto","Environ":null,"Command":["echo","hello"]}'
+
+out="$(TEST_A=1 TEST_B=2 TEST_C=3 TEST_D=4 TEST_E=5 TEST_F=6 TEST_G=7 TEST_H=8 TEST_I=9 ssh sshportal -l testserver echo hello | head -n 1)"
+test "$out" = '{"User":"toto","Environ":["TEST_A=1","TEST_B=2","TEST_C=3","TEST_D=4","TEST_E=5","TEST_F=6","TEST_G=7","TEST_H=8","TEST_I=9"],"Command":["echo","hello"]}'
+
+# TODO: test more cases (forwards, scp, sftp, interactive, pty, stdin, exit code, ...)

examples/integration/client_test_rsa

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

examples/integration/docker-compose.yml

@@ -0,0 +1,27 @@
+version: '3.0'
+
+services:
+  sshportal:
+    image: moul/sshportal
+    environment:
+      - SSHPORTAL_DEFAULT_ADMIN_INVITE_TOKEN=integration
+    command: server --debug
+    depends_on:
+      - testserver
+    ports:
+      - 2222
+
+  testserver:
+    image: moul/sshportal
+    command: _test_server
+    ports:
+      - 2222
+
+  client:
+    build: .
+    depends_on:
+      - sshportal
+      - testserver
+    #volumes:
+    #  - .:/integration
+    tty: true

examples/integration/test.sh

@@ -1,82 +0,0 @@
-#!/bin/sh -e
-# Setup a new sshportal and performs some checks
-
-PORT=${PORT:-2222}
-SSHPORTAL_DEFAULT_ADMIN_INVITE_TOKEN=integration
-
-# tempdir
-WORK_DIR=`mktemp -d`
-if [[ ! "$WORK_DIR" || ! -d "$WORK_DIR" ]]; then
-  echo "Could not create temp dir"
-  exit 1
-fi
-cd "${WORK_DIR}"
-
-# pre cleanup
-docker_cleanup() {
-    ( set -x
-      docker rm -f -v sshportal-integration 2>/dev/null >/dev/null || true
-    )
-}
-tempdir_cleanup() {
-    rm -rf "${WORK_DIR}"
-}
-docker_cleanup
-trap tempdir_cleanup EXIT
-
-# start server
-( set -xe;
-  docker run \
-       -d \
-       -e SSHPORTAL_DEFAULT_ADMIN_INVITE_TOKEN=${SSHPORTAL_DEFAULT_ADMIN_INVITE_TOKEN} \
-       --name=sshportal-integration \
-       -p${PORT}:2222 \
-       moul/sshportal --debug
-)
-while ! nc -z localhost ${PORT}; do
-    sleep 1
-done
-sleep 3
-
-# integration suite
-xssh() {
-    set -e
-    echo "+ ssh {sshportal} $@" >&2
-    ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no localhost -p ${PORT} $@
-}
-# login
-xssh -l invite:integration
-
-# hostgroup/usergroup/acl
-xssh -l admin hostgroup create
-xssh -l admin hostgroup create --name=hg1
-xssh -l admin hostgroup create --name=hg2 --comment=test
-xssh -l admin usergroup inspect hg1 hg2
-xssh -l admin hostgroup ls
-
-xssh -l admin usergroup create
-xssh -l admin usergroup create --name=ug1
-xssh -l admin usergroup create --name=ug2 --comment=test
-xssh -l admin usergroup inspect ug1 ug2
-xssh -l admin usergroup ls
-
-xssh -l admin acl create --ug=ug1 --ug=ug2 --hg=hg1 --hg=hg2 --comment=test --action=allow --weight=42
-xssh -l admin acl inspect 2
-xssh -l admin acl ls
-
-# basic host create
-xssh -l admin host create bob@example.org:1234
-xssh -l admin host create test42
-xssh -l admin host create --name=testtest --comment=test --password=test test@test.test
-xssh -l admin host create --group=hg1 --group=hg2 hostwithgroups.org
-xssh -l admin host inspect example test42 testtest hostwithgroups
-xssh -l admin host ls
-
-# backup/restore
-xssh -l admin config backup --indent > backup-1
-xssh -l admin config restore --confirm < backup-1
-xssh -l admin config backup --indent > backup-2
-diff <(cat backup-1 | grep -v '"date":') <(cat backup-2 | grep -v '"date":')
-
-# post cleanup
-#cleanup

examples/mysql/docker-compose.yml

@@ -9,7 +9,7 @@ services:
         condition: service_healthy
     links:
       - mysql
-    command: --db-driver=mysql --debug --db-conn="root:root@tcp(mysql:3306)/db?charset=utf8&parseTime=true&loc=Local"
+    command: server --db-driver=mysql --debug --db-conn="root:root@tcp(mysql:3306)/db?charset=utf8&parseTime=true&loc=Local"
     ports:
       - 2222:2222
 

healthcheck.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"net"
+	"strings"
+	"time"
+
+	"github.com/urfave/cli"
+	gossh "golang.org/x/crypto/ssh"
+)
+
+// perform a healthcheck test without requiring an ssh client or an ssh key (used for Docker's HEALTHCHECK)
+func healthcheck(addr string, wait, quiet bool) error {
+	cfg := gossh.ClientConfig{
+		User:            "healthcheck",
+		HostKeyCallback: func(hostname string, remote net.Addr, key gossh.PublicKey) error { return nil },
+		Auth:            []gossh.AuthMethod{gossh.Password("healthcheck")},
+	}
+
+	if wait {
+		for {
+			if err := healthcheckOnce(addr, cfg, quiet); err != nil {
+				if !quiet {
+					log.Printf("error: %v", err)
+				}
+				time.Sleep(time.Second)
+				continue
+			}
+			return nil
+		}
+	}
+
+	if err := healthcheckOnce(addr, cfg, quiet); err != nil {
+		if quiet {
+			return cli.NewExitError("", 1)
+		}
+		return err
+	}
+	return nil
+}
+
+func healthcheckOnce(addr string, config gossh.ClientConfig, quiet bool) error {
+	client, err := gossh.Dial("tcp", addr, &config)
+	if err != nil {
+		return err
+	}
+
+	session, err := client.NewSession()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err := session.Close(); err != nil {
+			if !quiet {
+				log.Printf("failed to close session: %v", err)
+			}
+		}
+	}()
+
+	var b bytes.Buffer
+	session.Stdout = &b
+	if err := session.Run(""); err != nil {
+		return err
+	}
+	stdout := strings.TrimSpace(b.String())
+	if stdout != "OK" {
+		return fmt.Errorf("invalid stdout: %q expected 'OK'", stdout)
+	}
+	return nil
+}

hidden.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"os/exec"
+	"syscall"
+	"unsafe"
+
+	"github.com/gliderlabs/ssh"
+	"github.com/kr/pty"
+	"github.com/urfave/cli"
+)
+
+// testServer is an hidden handler used for integration tests
+func testServer(c *cli.Context) error {
+	ssh.Handle(func(s ssh.Session) {
+		helloMsg := struct {
+			User    string
+			Environ []string
+			Command []string
+		}{
+			User:    s.User(),
+			Environ: s.Environ(),
+			Command: s.Command(),
+		}
+
+		if err := json.NewEncoder(s).Encode(&helloMsg); err != nil {
+			log.Fatalf("failed to write helloMsg: %v", err)
+		}
+		cmd := exec.Command(s.Command()[0], s.Command()[1:]...) // #nosec
+		if s.Command() == nil {
+			cmd = exec.Command("/bin/sh") // #nosec
+		}
+		ptyReq, winCh, isPty := s.Pty()
+		var cmdErr error
+		if isPty {
+			cmd.Env = append(cmd.Env, fmt.Sprintf("TERM=%s", ptyReq.Term))
+			f, err := pty.Start(cmd)
+			if err != nil {
+				fmt.Fprintf(s, "failed to run command: %v\n", err) // #nosec
+				_ = s.Exit(1)                                      // #nosec
+				return
+			}
+			go func() {
+				for win := range winCh {
+					_, _, _ = syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCSWINSZ),
+						uintptr(unsafe.Pointer(&struct{ h, w, x, y uint16 }{uint16(win.Height), uint16(win.Width), 0, 0}))) // #nosec
+				}
+			}()
+			go func() {
+				// stdin
+				_, _ = io.Copy(f, s) // #nosec
+			}()
+			// stdout
+			_, _ = io.Copy(s, f) // #nosec
+			cmdErr = cmd.Wait()
+		} else {
+			//cmd.Stdin = s
+			cmd.Stdout = s
+			cmd.Stderr = s
+			cmdErr = cmd.Run()
+		}
+
+		if cmdErr != nil {
+			if exitError, ok := cmdErr.(*exec.ExitError); ok {
+				_ = s.Exit(exitError.Sys().(syscall.WaitStatus).ExitStatus()) // #nosec
+				return
+			}
+		}
+		_ = s.Exit(cmd.ProcessState.Sys().(syscall.WaitStatus).ExitStatus()) // #nosec
+	})
+
+	log.Println("starting ssh server on port 2222...")
+	return ssh.ListenAndServe(":2222", nil)
+}

main.go

@@ -1,13 +1,12 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"log"
 	"math/rand"
+	"net"
 	"os"
 	"path"
-	"strings"
 	"time"
 
 	"github.com/gliderlabs/ssh"
@@ -15,26 +14,17 @@ import (
 	_ "github.com/jinzhu/gorm/dialects/mysql"
 	_ "github.com/jinzhu/gorm/dialects/sqlite"
 	"github.com/urfave/cli"
-	gossh "golang.org/x/crypto/ssh"
 )
 
 var (
-	// VERSION should be updated by hand at each release
-	VERSION = "1.3.0"
-	// GIT_TAG will be overwritten automatically by the build system
-	GIT_TAG string
-	// GIT_SHA will be overwritten automatically by the build system
-	GIT_SHA string
-	// GIT_BRANCH will be overwritten automatically by the build system
-	GIT_BRANCH string
-)
-
-type sshportalContextKey string
-
-var (
-	userContextKey    = sshportalContextKey("user")
-	messageContextKey = sshportalContextKey("message")
-	errorContextKey   = sshportalContextKey("error")
+	// Version should be updated by hand at each release
+	Version = "1.8.0"
+	// GitTag will be overwritten automatically by the build system
+	GitTag string
+	// GitSha will be overwritten automatically by the build system
+	GitSha string
+	// GitBranch will be overwritten automatically by the build system
+	GitBranch string
 )
 
 func main() {
@@ -43,194 +33,130 @@ func main() {
 	app := cli.NewApp()
 	app.Name = path.Base(os.Args[0])
 	app.Author = "Manfred Touron"
-	app.Version = VERSION + " (" + GIT_SHA + ")"
+	app.Version = Version + " (" + GitSha + ")"
 	app.Email = "https://github.com/moul/sshportal"
-	app.Flags = []cli.Flag{
-		cli.StringFlag{
-			Name:   "bind-address, b",
-			EnvVar: "SSHPORTAL_BIND",
-			Value:  ":2222",
-			Usage:  "SSH server bind address",
-		},
-		cli.BoolFlag{
-			Name:  "demo",
-			Usage: "*unsafe* - demo mode: accept all connections",
-		},
-		/*cli.StringFlag{
-			Name:  "db-driver",
-			Value: "sqlite3",
-			Usage: "GORM driver (sqlite3)",
-		},*/
-		cli.StringFlag{
-			Name:  "db-conn",
-			Value: "./sshportal.db",
-			Usage: "GORM connection string",
-		},
-		cli.BoolFlag{
-			Name:  "debug, D",
-			Usage: "Display debug information",
-		},
-		cli.StringFlag{
-			Name:  "config-user",
-			Usage: "SSH user that spawns a configuration shell",
-			Value: "admin",
+	app.Commands = []cli.Command{
+		{
+			Name:  "server",
+			Usage: "Start sshportal server",
+			Action: func(c *cli.Context) error {
+				if err := ensureLogDirectory(c.String("logs-location")); err != nil {
+					return err
+				}
+				cfg, err := parseServeConfig(c)
+				if err != nil {
+					return err
+				}
+				return server(cfg)
+			},
+			Flags: []cli.Flag{
+				cli.StringFlag{
+					Name:   "bind-address, b",
+					EnvVar: "SSHPORTAL_BIND",
+					Value:  ":2222",
+					Usage:  "SSH server bind address",
+				},
+				cli.StringFlag{
+					Name:  "db-driver",
+					Value: "sqlite3",
+					Usage: "GORM driver (sqlite3)",
+				},
+				cli.StringFlag{
+					Name:  "db-conn",
+					Value: "./sshportal.db",
+					Usage: "GORM connection string",
+				},
+				cli.BoolFlag{
+					Name:  "debug, D",
+					Usage: "Display debug information",
+				},
+				cli.StringFlag{
+					Name:  "aes-key",
+					Usage: "Encrypt sensitive data in database (length: 16, 24 or 32)",
+				},
+				cli.StringFlag{
+					Name:  "logs-location",
+					Value: "./log",
+					Usage: "Store user session files",
+				},
+			},
+		}, {
+			Name:   "healthcheck",
+			Action: func(c *cli.Context) error { return healthcheck(c.String("addr"), c.Bool("wait"), c.Bool("quiet")) },
+			Flags: []cli.Flag{
+				cli.StringFlag{
+					Name:  "addr, a",
+					Value: "localhost:2222",
+					Usage: "sshportal server address",
+				},
+				cli.BoolFlag{
+					Name:  "wait, w",
+					Usage: "Loop indefinitely until sshportal is ready",
+				},
+				cli.BoolFlag{
+					Name:  "quiet, q",
+					Usage: "Do not print errors, if any",
+				},
+			},
+		}, {
+			Name:   "_test_server",
+			Hidden: true,
+			Action: testServer,
 		},
 	}
-	app.Action = server
 	if err := app.Run(os.Args); err != nil {
 		log.Fatalf("error: %v", err)
 	}
 }
 
-func server(c *cli.Context) error {
-	// db
-	db, err := gorm.Open("sqlite3", c.String("db-conn"))
+func server(c *configServe) (err error) {
+	var db = (*gorm.DB)(nil)
+
+	// try to setup the local DB
+	if db, err = gorm.Open(c.dbDriver, c.dbURL); err != nil {
+		return
+	}
+	defer func() {
+		origErr := err
+		err = db.Close()
+		if origErr != nil {
+			err = origErr
+		}
+	}()
+	if err = db.DB().Ping(); err != nil {
+		return
+	}
+	db.LogMode(c.debug)
+	if err = dbInit(db); err != nil {
+		return
+	}
+
+	// create TCP listening socket
+	ln, err := net.Listen("tcp", c.bindAddr)
 	if err != nil {
 		return err
 	}
-	defer db.Close()
-	if err = db.DB().Ping(); err != nil {
-		return err
+
+	// configure server
+	srv := &ssh.Server{
+		Addr:           c.bindAddr,
+		Handler:        shellHandler, // ssh.Server.Handler is the handler for the DefaultSessionHandler
+		Version:        fmt.Sprintf("sshportal-%s", Version),
+		ChannelHandler: channelHandler,
 	}
-	if c.Bool("debug") {
-		db.LogMode(true)
-	}
-	if err := dbInit(db); err != nil {
-		return err
-	}
-	if c.Bool("demo") {
-		if err := dbDemo(db); err != nil {
+
+	for _, opt := range []ssh.Option{
+		// custom PublicKeyAuth handler
+		ssh.PublicKeyAuth(publicKeyAuthHandler(db, c)),
+		ssh.PasswordAuth(passwordAuthHandler(db, c)),
+		// retrieve sshportal SSH private key from database
+		privateKeyFromDB(db, c.aesKey),
+	} {
+		if err := srv.SetOption(opt); err != nil {
 			return err
 		}
 	}
 
-	// ssh server
-	ssh.Handle(func(s ssh.Session) {
-		currentUser := s.Context().Value(userContextKey).(User)
-		log.Printf("New connection: sshUser=%q remote=%q local=%q command=%q dbUser=id:%q,email:%s", s.User(), s.RemoteAddr(), s.LocalAddr(), s.Command(), currentUser.ID, currentUser.Email)
-
-		if err := s.Context().Value(errorContextKey); err != nil {
-			fmt.Fprintf(s, "error: %v\n", err)
-			return
-		}
-
-		if msg := s.Context().Value(messageContextKey); msg != nil {
-			fmt.Fprint(s, msg.(string))
-		}
-
-		switch username := s.User(); {
-		case username == currentUser.Name || username == currentUser.Email || username == c.String("config-user"):
-			if err := shell(c, s, s.Command(), db); err != nil {
-				fmt.Fprintf(s, "error: %v\n", err)
-			}
-		case strings.HasPrefix(username, "invite:"):
-			return
-		default:
-			host, err := RemoteHostFromSession(s, db)
-			if err != nil {
-				fmt.Fprintf(s, "error: %v\n", err)
-				// FIXME: print available hosts
-				return
-			}
-
-			// load up-to-date objects
-			// FIXME: cache them or try not to load them
-			var tmpUser User
-			if err := db.Preload("Groups").Preload("Groups.ACLs").Where("id = ?", currentUser.ID).First(&tmpUser).Error; err != nil {
-				fmt.Fprintf(s, "error: %v\n", err)
-				return
-			}
-			var tmpHost Host
-			if err := db.Preload("Groups").Preload("Groups.ACLs").Where("id = ?", host.ID).First(&tmpHost).Error; err != nil {
-				fmt.Fprintf(s, "error: %v\n", err)
-				return
-			}
-
-			action, err := CheckACLs(tmpUser, tmpHost)
-			if err != nil {
-				fmt.Fprintf(s, "error: %v\n", err)
-				return
-			}
-
-			switch action {
-			case "allow":
-				if err := proxy(s, host); err != nil {
-					fmt.Fprintf(s, "error: %v\n", err)
-				}
-			case "deny":
-				fmt.Fprintf(s, "You don't have permission to that host.\n")
-			default:
-				fmt.Fprintf(s, "error: %v\n", err)
-			}
-
-		}
-	})
-
-	opts := []ssh.Option{}
-	opts = append(opts, ssh.PublicKeyAuth(func(ctx ssh.Context, key ssh.PublicKey) bool {
-		var (
-			userKey  UserKey
-			user     User
-			username = ctx.User()
-		)
-
-		// lookup user by key
-		db.Where("key = ?", key.Marshal()).First(&userKey)
-		if userKey.UserID > 0 {
-			db.Preload("Roles").Where("id = ?", userKey.UserID).First(&user)
-			if strings.HasPrefix(username, "invite:") {
-				ctx.SetValue(errorContextKey, fmt.Errorf("invites are only supported for ney SSH keys; your ssh key is already associated with the user %q.", user.Email))
-			}
-			ctx.SetValue(userContextKey, user)
-			return true
-		}
-
-		// handle invite "links"
-		if strings.HasPrefix(username, "invite:") {
-			inputToken := strings.Split(username, ":")[1]
-			if len(inputToken) > 0 {
-				db.Where("invite_token = ?", inputToken).First(&user)
-			}
-			if user.ID > 0 {
-				userKey = UserKey{
-					UserID:  user.ID,
-					Key:     key.Marshal(),
-					Comment: "created by sshportal",
-				}
-				db.Create(&userKey)
-
-				// token is only usable once
-				user.InviteToken = ""
-				db.Update(&user)
-
-				ctx.SetValue(messageContextKey, fmt.Sprintf("Welcome %s!\n\nYour key is now associated with the user %q.\n", user.Name, user.Email))
-				ctx.SetValue(userContextKey, user)
-			} else {
-				ctx.SetValue(userContextKey, User{Name: "Anonymous"})
-				ctx.SetValue(errorContextKey, errors.New("your token is invalid or expired"))
-			}
-			return true
-		}
-
-		// fallback
-		ctx.SetValue(errorContextKey, errors.New("unknown ssh key"))
-		ctx.SetValue(userContextKey, User{Name: "Anonymous"})
-		return true
-	}))
-
-	opts = append(opts, func(srv *ssh.Server) error {
-		var key SSHKey
-		if err := SSHKeysByIdentifiers(db, []string{"host"}).First(&key).Error; err != nil {
-			return err
-		}
-		signer, err := gossh.ParsePrivateKey([]byte(key.PrivKey))
-		if err != nil {
-			return err
-		}
-		srv.AddHostKey(signer)
-		return nil
-	})
-
-	log.Printf("SSH Server accepting connections on %s", c.String("bind-address"))
-	return ssh.ListenAndServe(c.String("bind-address"), nil, opts...)
+	log.Printf("info: SSH Server accepting connections on %s", c.bindAddr)
+	return srv.Serve(ln)
 }

pkg/bastionsession/bastionsession.go

@@ -0,0 +1,201 @@
+package bastionsession
+
+import (
+	"errors"
+	"io"
+	"log"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/arkan/bastion/pkg/logchannel"
+	"github.com/gliderlabs/ssh"
+	"github.com/moul/sshportal/pkg/logtunnel"
+	gossh "golang.org/x/crypto/ssh"
+)
+
+type ForwardData struct {
+	DestinationHost string
+	DestinationPort uint32
+	SourceHost      string
+	SourcePort      uint32
+}
+
+type Config struct {
+	Addr         string
+	Logs         string
+	ClientConfig *gossh.ClientConfig
+}
+
+func MultiChannelHandler(srv *ssh.Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx ssh.Context, configs []Config) error {
+	var lastClient *gossh.Client
+	switch newChan.ChannelType() {
+	case "session":
+		lch, lreqs, err := newChan.Accept()
+		// TODO: defer clean closer
+		if err != nil {
+			// TODO: trigger event callback
+			return nil
+		}
+
+		// go through all the hops
+		for _, config := range configs {
+			var client *gossh.Client
+			if lastClient == nil {
+				client, err = gossh.Dial("tcp", config.Addr, config.ClientConfig)
+			} else {
+				rconn, err := lastClient.Dial("tcp", config.Addr)
+				if err != nil {
+					return err
+				}
+				ncc, chans, reqs, err := gossh.NewClientConn(rconn, config.Addr, config.ClientConfig)
+				if err != nil {
+					return err
+				}
+				client = gossh.NewClient(ncc, chans, reqs)
+			}
+			if err != nil {
+				return err
+			}
+			defer func() { _ = client.Close() }()
+			lastClient = client
+		}
+
+		rch, rreqs, err := lastClient.OpenChannel("session", []byte{})
+		if err != nil {
+			return err
+		}
+		user := conn.User()
+		// pipe everything
+		return pipe(lreqs, rreqs, lch, rch, configs[len(configs)-1].Logs, user, newChan)
+	case "direct-tcpip":
+		lch, lreqs, err := newChan.Accept()
+		// TODO: defer clean closer
+		if err != nil {
+			// TODO: trigger event callback
+			return nil
+		}
+
+		// go through all the hops
+		for _, config := range configs {
+			var client *gossh.Client
+			if lastClient == nil {
+				client, err = gossh.Dial("tcp", config.Addr, config.ClientConfig)
+			} else {
+				rconn, err := lastClient.Dial("tcp", config.Addr)
+				if err != nil {
+					return err
+				}
+				ncc, chans, reqs, err := gossh.NewClientConn(rconn, config.Addr, config.ClientConfig)
+				if err != nil {
+					return err
+				}
+				client = gossh.NewClient(ncc, chans, reqs)
+			}
+			if err != nil {
+				return err
+			}
+			defer func() { _ = client.Close() }()
+			lastClient = client
+		}
+
+		d := logtunnel.ForwardData{}
+		if err := gossh.Unmarshal(newChan.ExtraData(), &d); err != nil {
+			return err
+		}
+		rch, rreqs, err := lastClient.OpenChannel("direct-tcpip", newChan.ExtraData())
+		if err != nil {
+			return err
+		}
+		user := conn.User()
+		// pipe everything
+		return pipe(lreqs, rreqs, lch, rch, configs[len(configs)-1].Logs, user, newChan)
+	default:
+		newChan.Reject(gossh.UnknownChannelType, "unsupported channel type")
+		return nil
+	}
+}
+
+func pipe(lreqs, rreqs <-chan *gossh.Request, lch, rch gossh.Channel, logsLocation string, user string, newChan gossh.NewChannel) error {
+	defer func() {
+		_ = lch.Close()
+		_ = rch.Close()
+	}()
+
+	errch := make(chan error, 1)
+	channeltype := newChan.ChannelType()
+
+	file_name := strings.Join([]string{logsLocation, "/", user, "-", channeltype, "-", time.Now().Format(time.RFC3339)}, "") // get user
+	f, err := os.OpenFile(file_name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640)
+	defer f.Close()
+
+	if err != nil {
+		log.Fatalf("error: %v", err)
+	}
+
+	log.Printf("Session %v is recorded in %v", channeltype, file_name)
+	if channeltype == "session" {
+		wrappedlch := logchannel.New(lch, f)
+		go func() {
+			_, _ = io.Copy(wrappedlch, rch)
+			errch <- errors.New("lch closed the connection")
+		}()
+
+		go func() {
+			_, _ = io.Copy(rch, lch)
+			errch <- errors.New("rch closed the connection")
+		}()
+	}
+	if channeltype == "direct-tcpip" {
+		d := logtunnel.ForwardData{}
+		if err := gossh.Unmarshal(newChan.ExtraData(), &d); err != nil {
+			return err
+		}
+		wrappedlch := logtunnel.New(lch, f, d.SourceHost)
+		wrappedrch := logtunnel.New(rch, f, d.DestinationHost)
+		go func() {
+			_, _ = io.Copy(wrappedlch, rch)
+			errch <- errors.New("lch closed the connection")
+		}()
+
+		go func() {
+			_, _ = io.Copy(wrappedrch, lch)
+			errch <- errors.New("rch closed the connection")
+		}()
+	}
+
+	for {
+		select {
+		case req := <-lreqs: // forward ssh requests from local to remote
+			if req == nil {
+				return nil
+			}
+			b, err := rch.SendRequest(req.Type, req.WantReply, req.Payload)
+			if req.Type == "exec" {
+				wrappedlch := logchannel.New(lch, f)
+				command := append(req.Payload, []byte("\n")...)
+				wrappedlch.LogWrite(command)
+			}
+
+			if err != nil {
+				return err
+			}
+			if err2 := req.Reply(b, nil); err2 != nil {
+				return err2
+			}
+		case req := <-rreqs: // forward ssh requests from remote to local
+			if req == nil {
+				return nil
+			}
+			b, err := lch.SendRequest(req.Type, req.WantReply, req.Payload)
+			if err != nil {
+				return err
+			}
+			if err2 := req.Reply(b, nil); err2 != nil {
+				return err2
+			}
+		case err := <-errch:
+			return err
+		}
+	}
+}

pkg/logtunnel/logtunnel.go

@@ -0,0 +1,59 @@
+package logtunnel
+
+import (
+	"encoding/binary"
+	"io"
+	"syscall"
+	"time"
+
+	"golang.org/x/crypto/ssh"
+)
+
+type logTunnel struct {
+	host    string
+	channel ssh.Channel
+	writer  io.WriteCloser
+}
+
+type ForwardData struct {
+	DestinationHost string
+	DestinationPort uint32
+	SourceHost string
+	SourcePort uint32
+}
+
+func writeHeader(fd io.Writer, length int) {
+	t := time.Now()
+
+	tv := syscall.NsecToTimeval(t.UnixNano())
+
+	binary.Write(fd, binary.LittleEndian, int32(tv.Sec))
+	binary.Write(fd, binary.LittleEndian, int32(tv.Usec))
+	binary.Write(fd, binary.LittleEndian, int32(length))
+}
+
+func New(channel ssh.Channel, writer io.WriteCloser, host string) *logTunnel {
+	return &logTunnel{
+		host: host,
+		channel: channel,
+		writer:  writer,
+	}
+}
+
+func (l *logTunnel) Read(data []byte) (int, error) {
+	return l.Read(data)
+}
+
+func (l *logTunnel) Write(data []byte) (int, error) {
+	writeHeader(l.writer, len(data) + len(l.host + ": "))
+	l.writer.Write([]byte(l.host + ": "))
+	l.writer.Write(data)
+
+	return l.channel.Write(data)
+}
+
+func (l *logTunnel) Close() error {
+	l.writer.Close()
+
+	return l.channel.Close()
+}

proxy.go

@@ -1,99 +0,0 @@
-package main
-
-import (
-	"errors"
-	"fmt"
-	"io"
-	"log"
-
-	"github.com/gliderlabs/ssh"
-	gossh "golang.org/x/crypto/ssh"
-)
-
-func proxy(s ssh.Session, host *Host) error {
-	config, err := host.ClientConfig(s)
-	if err != nil {
-		return err
-	}
-
-	rconn, err := gossh.Dial("tcp", host.Addr, config)
-	if err != nil {
-		return err
-	}
-	defer rconn.Close()
-
-	rch, rreqs, err := rconn.OpenChannel("session", []byte{})
-	if err != nil {
-		return err
-	}
-
-	log.Println("SSH Connectin established")
-	return pipe(s.MaskedReqs(), rreqs, s, rch)
-}
-
-func pipe(lreqs, rreqs <-chan *gossh.Request, lch, rch gossh.Channel) error {
-	defer func() {
-		lch.Close()
-		rch.Close()
-	}()
-
-	errch := make(chan error, 1)
-
-	go func() {
-		_, _ = io.Copy(lch, rch)
-		errch <- errors.New("lch closed the connection")
-	}()
-
-	go func() {
-		_, _ = io.Copy(rch, lch)
-		errch <- errors.New("rch closed the connection")
-	}()
-
-	for {
-		select {
-		case req := <-lreqs: // forward ssh requests from local to remote
-			if req == nil {
-				return nil
-			}
-			b, err := rch.SendRequest(req.Type, req.WantReply, req.Payload)
-			if err != nil {
-				return err
-			}
-			req.Reply(b, nil)
-		case req := <-rreqs: // forward ssh requests from remote to local
-			if req == nil {
-				return nil
-			}
-			b, err := lch.SendRequest(req.Type, req.WantReply, req.Payload)
-			if err != nil {
-				return err
-			}
-			req.Reply(b, nil)
-		case err := <-errch:
-			return err
-		}
-	}
-	return nil
-}
-
-func (host *Host) ClientConfig(_ ssh.Session) (*gossh.ClientConfig, error) {
-	config := gossh.ClientConfig{
-		User:            host.User,
-		HostKeyCallback: gossh.InsecureIgnoreHostKey(),
-		Auth:            []gossh.AuthMethod{},
-	}
-	if host.SSHKey != nil {
-		signer, err := gossh.ParsePrivateKey([]byte(host.SSHKey.PrivKey))
-		if err != nil {
-			return nil, err
-		}
-		config.Auth = append(config.Auth, gossh.PublicKeys(signer))
-	}
-	if host.Password != "" {
-		config.Auth = append(config.Auth, gossh.Password(host.Password))
-	}
-	if len(config.Auth) == 0 {
-		return nil, fmt.Errorf("no valid authentication method for host %q", host.Name)
-	}
-	return &config, nil
-}

ssh.go

@@ -0,0 +1,350 @@
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"log"
+	"net"
+	"strings"
+	"time"
+
+	"github.com/gliderlabs/ssh"
+	"github.com/jinzhu/gorm"
+	"github.com/moul/sshportal/pkg/bastionsession"
+	gossh "golang.org/x/crypto/ssh"
+)
+
+type sshportalContextKey string
+
+var authContextKey = sshportalContextKey("auth")
+
+type authContext struct {
+	message       string
+	err           error
+	user          User
+	inputUsername string
+	db            *gorm.DB
+	userKey       UserKey
+	config        *configServe
+	authMethod    string
+	authSuccess   bool
+}
+
+type UserType string
+
+const (
+	UserTypeHealthcheck UserType = "healthcheck"
+	UserTypeBastion              = "bastion"
+	UserTypeInvite               = "invite"
+	UserTypeShell                = "shell"
+)
+
+type SessionType string
+
+const (
+	SessionTypeBastion SessionType = "bastion"
+	SessionTypeShell               = "shell"
+)
+
+func (c authContext) userType() UserType {
+	switch {
+	case c.inputUsername == "healthcheck":
+		return UserTypeHealthcheck
+	case c.inputUsername == c.user.Name || c.inputUsername == c.user.Email || c.inputUsername == "admin":
+		return UserTypeShell
+	case strings.HasPrefix(c.inputUsername, "invite:"):
+		return UserTypeInvite
+	default:
+		return UserTypeBastion
+	}
+}
+
+func (c authContext) sessionType() SessionType {
+	switch c.userType() {
+	case "bastion":
+		return SessionTypeBastion
+	default:
+		return SessionTypeShell
+	}
+}
+
+func dynamicHostKey(db *gorm.DB, host *Host) gossh.HostKeyCallback {
+	return func(hostname string, remote net.Addr, key gossh.PublicKey) error {
+		if len(host.HostKey) == 0 {
+			log.Println("Discovering host fingerprint...")
+			return db.Model(host).Update("HostKey", key.Marshal()).Error
+		}
+
+		if !bytes.Equal(host.HostKey, key.Marshal()) {
+			return fmt.Errorf("ssh: host key mismatch")
+		}
+		return nil
+	}
+}
+
+func channelHandler(srv *ssh.Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx ssh.Context) {
+	switch newChan.ChannelType() {
+	case "session":
+	case "direct-tcpip":
+	default:
+		// TODO: handle direct-tcp (only for ssh scheme)
+		if err := newChan.Reject(gossh.UnknownChannelType, "unsupported channel type"); err != nil {
+			log.Printf("error: failed to reject channel: %v", err)
+		}
+		return
+	}
+
+	actx := ctx.Value(authContextKey).(*authContext)
+
+	switch actx.userType() {
+	case UserTypeBastion:
+		log.Printf("New connection(bastion): sshUser=%q remote=%q local=%q dbUser=id:%q,email:%s", conn.User(), conn.RemoteAddr(), conn.LocalAddr(), actx.user.ID, actx.user.Email)
+		host, err := HostByName(actx.db, actx.inputUsername)
+		if err != nil {
+			ch, _, err2 := newChan.Accept()
+			if err2 != nil {
+				return
+			}
+			fmt.Fprintf(ch, "error: %v\n", err)
+			// FIXME: force close all channels
+			_ = ch.Close()
+			return
+		}
+
+		switch host.Scheme() {
+		case BastionSchemeSSH:
+			sessionConfigs := make([]bastionsession.Config, 0)
+			currentHost := host
+			for currentHost != nil {
+				clientConfig, err2 := bastionClientConfig(ctx, currentHost)
+				if err2 != nil {
+					ch, _, err3 := newChan.Accept()
+					if err3 != nil {
+						return
+					}
+					fmt.Fprintf(ch, "error: %v\n", err2)
+					// FIXME: force close all channels
+					_ = ch.Close()
+					return
+				}
+				sessionConfigs = append([]bastionsession.Config{{
+					Addr:         currentHost.DialAddr(),
+					ClientConfig: clientConfig,
+					Logs:         actx.config.logsLocation,
+				}}, sessionConfigs...)
+				if currentHost.HopID != 0 {
+					var newHost Host
+					actx.db.Model(currentHost).Related(&newHost, "HopID")
+					hostname := newHost.Name
+					currentHost, _ = HostByName(actx.db, hostname)
+				} else {
+					currentHost = nil
+				}
+			}
+
+			sess := Session{
+				UserID: actx.user.ID,
+				HostID: host.ID,
+				Status: SessionStatusActive,
+			}
+			if err = actx.db.Create(&sess).Error; err != nil {
+				ch, _, err2 := newChan.Accept()
+				if err2 != nil {
+					return
+				}
+				fmt.Fprintf(ch, "error: %v\n", err)
+				_ = ch.Close()
+				return
+			}
+
+			go func() {
+				err = bastionsession.MultiChannelHandler(srv, conn, newChan, ctx, sessionConfigs)
+				if err != nil {
+					log.Printf("Error: %v", err)
+				}
+			}()
+
+			now := time.Now()
+			sessUpdate := Session{
+				Status:    SessionStatusClosed,
+				ErrMsg:    fmt.Sprintf("%v", err),
+				StoppedAt: &now,
+			}
+			switch sessUpdate.ErrMsg {
+			case "lch closed the connection", "rch closed the connection":
+				sessUpdate.ErrMsg = ""
+			}
+			actx.db.Model(&sess).Updates(&sessUpdate)
+		case BastionSchemeTelnet:
+			tmpSrv := ssh.Server{
+				// PtyCallback: srv.PtyCallback,
+				Handler: telnetHandler(host),
+			}
+			ssh.DefaultChannelHandler(&tmpSrv, conn, newChan, ctx)
+		default:
+			ch, _, err2 := newChan.Accept()
+			if err2 != nil {
+				return
+			}
+			fmt.Fprintf(ch, "error: unknown bastion scheme: %q\n", host.Scheme())
+			// FIXME: force close all channels
+			_ = ch.Close()
+		}
+	default: // shell
+		ssh.DefaultChannelHandler(srv, conn, newChan, ctx)
+	}
+}
+
+func bastionClientConfig(ctx ssh.Context, host *Host) (*gossh.ClientConfig, error) {
+	actx := ctx.Value(authContextKey).(*authContext)
+
+	clientConfig, err := host.clientConfig(dynamicHostKey(actx.db, host))
+	if err != nil {
+		return nil, err
+	}
+
+	var tmpUser User
+	if err = actx.db.Preload("Groups").Preload("Groups.ACLs").Where("id = ?", actx.user.ID).First(&tmpUser).Error; err != nil {
+		return nil, err
+	}
+	var tmpHost Host
+	if err = actx.db.Preload("Groups").Preload("Groups.ACLs").Where("id = ?", host.ID).First(&tmpHost).Error; err != nil {
+		return nil, err
+	}
+	action, err2 := CheckACLs(tmpUser, tmpHost)
+	if err2 != nil {
+		return nil, err2
+	}
+
+	HostDecrypt(actx.config.aesKey, host)
+	SSHKeyDecrypt(actx.config.aesKey, host.SSHKey)
+
+	switch action {
+	case ACLActionAllow:
+	case ACLActionDeny:
+		return nil, fmt.Errorf("you don't have permission to that host")
+	default:
+		return nil, fmt.Errorf("invalid ACL action: %q", action)
+	}
+	return clientConfig, nil
+}
+
+func shellHandler(s ssh.Session) {
+	actx := s.Context().Value(authContextKey).(*authContext)
+	if actx.userType() != UserTypeHealthcheck {
+		log.Printf("New connection(shell): sshUser=%q remote=%q local=%q command=%q dbUser=id:%q,email:%s", s.User(), s.RemoteAddr(), s.LocalAddr(), s.Command(), actx.user.ID, actx.user.Email)
+	}
+
+	if actx.err != nil {
+		fmt.Fprintf(s, "error: %v\n", actx.err)
+		_ = s.Exit(1)
+		return
+	}
+
+	if actx.message != "" {
+		fmt.Fprint(s, actx.message)
+	}
+
+	switch actx.userType() {
+	case UserTypeHealthcheck:
+		fmt.Fprintln(s, "OK")
+		return
+	case UserTypeShell:
+		if err := shell(s); err != nil {
+			fmt.Fprintf(s, "error: %v\n", err)
+			_ = s.Exit(1)
+		}
+		return
+	case UserTypeInvite:
+		// do nothing (message was printed at the beginning of the function)
+		return
+	}
+	panic("should not happen")
+}
+
+func passwordAuthHandler(db *gorm.DB, cfg *configServe) ssh.PasswordHandler {
+	return func(ctx ssh.Context, pass string) bool {
+		actx := &authContext{
+			db:            db,
+			inputUsername: ctx.User(),
+			config:        cfg,
+			authMethod:    "password",
+		}
+		actx.authSuccess = actx.userType() == UserTypeHealthcheck
+		ctx.SetValue(authContextKey, actx)
+		return actx.authSuccess
+	}
+}
+
+func privateKeyFromDB(db *gorm.DB, aesKey string) func(*ssh.Server) error {
+	return func(srv *ssh.Server) error {
+		var key SSHKey
+		if err := SSHKeysByIdentifiers(db, []string{"host"}).First(&key).Error; err != nil {
+			return err
+		}
+		SSHKeyDecrypt(aesKey, &key)
+
+		signer, err := gossh.ParsePrivateKey([]byte(key.PrivKey))
+		if err != nil {
+			return err
+		}
+		srv.AddHostKey(signer)
+		return nil
+	}
+}
+
+func publicKeyAuthHandler(db *gorm.DB, cfg *configServe) ssh.PublicKeyHandler {
+	return func(ctx ssh.Context, key ssh.PublicKey) bool {
+		actx := &authContext{
+			db:            db,
+			inputUsername: ctx.User(),
+			config:        cfg,
+			authMethod:    "pubkey",
+			authSuccess:   true,
+		}
+		ctx.SetValue(authContextKey, actx)
+
+		// lookup user by key
+		db.Where("authorized_key = ?", string(gossh.MarshalAuthorizedKey(key))).First(&actx.userKey)
+		if actx.userKey.UserID > 0 {
+			db.Preload("Roles").Where("id = ?", actx.userKey.UserID).First(&actx.user)
+			if actx.userType() == UserTypeInvite {
+				actx.err = fmt.Errorf("invites are only supported for new SSH keys; your ssh key is already associated with the user %q", actx.user.Email)
+			}
+			return true
+		}
+
+		// handle invite "links"
+		if actx.userType() == UserTypeInvite {
+			inputToken := strings.Split(actx.inputUsername, ":")[1]
+			if len(inputToken) > 0 {
+				db.Where("invite_token = ?", inputToken).First(&actx.user)
+			}
+			if actx.user.ID > 0 {
+				actx.userKey = UserKey{
+					UserID:        actx.user.ID,
+					Key:           key.Marshal(),
+					Comment:       "created by sshportal",
+					AuthorizedKey: string(gossh.MarshalAuthorizedKey(key)),
+				}
+				db.Create(&actx.userKey)
+
+				// token is only usable once
+				actx.user.InviteToken = ""
+				db.Model(&actx.user).Updates(&actx.user)
+
+				actx.message = fmt.Sprintf("Welcome %s!\n\nYour key is now associated with the user %q.\n", actx.user.Name, actx.user.Email)
+			} else {
+				actx.user = User{Name: "Anonymous"}
+				actx.err = errors.New("your token is invalid or expired")
+			}
+			return true
+		}
+
+		// fallback
+		actx.err = errors.New("unknown ssh key")
+		actx.user = User{Name: "Anonymous"}
+		return true
+	}
+}

telnet.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"time"
+
+	"github.com/gliderlabs/ssh"
+	oi "github.com/reiver/go-oi"
+	telnet "github.com/reiver/go-telnet"
+)
+
+type bastionTelnetCaller struct {
+	ssh ssh.Session
+}
+
+func (caller bastionTelnetCaller) CallTELNET(ctx telnet.Context, w telnet.Writer, r telnet.Reader) {
+	go func(writer io.Writer, reader io.Reader) {
+		var buffer [1]byte // Seems like the length of the buffer needs to be small, otherwise will have to wait for buffer to fill up.
+		p := buffer[:]
+
+		for {
+			// Read 1 byte.
+			n, err := reader.Read(p)
+			if n <= 0 && err == nil {
+				continue
+			} else if n <= 0 && err != nil {
+				break
+			}
+
+			if _, err = oi.LongWrite(writer, p); err != nil {
+				log.Printf("telnet longwrite failed: %v", err)
+			}
+		}
+	}(caller.ssh, r)
+
+	var buffer bytes.Buffer
+	var p []byte
+
+	var crlfBuffer = [2]byte{'\r', '\n'}
+	crlf := crlfBuffer[:]
+
+	scanner := bufio.NewScanner(caller.ssh)
+	scanner.Split(scannerSplitFunc)
+
+	for scanner.Scan() {
+		buffer.Write(scanner.Bytes())
+		buffer.Write(crlf)
+
+		p = buffer.Bytes()
+
+		n, err := oi.LongWrite(w, p)
+		if nil != err {
+			break
+		}
+		if expected, actual := int64(len(p)), n; expected != actual {
+			err := fmt.Errorf("transmission problem: tried sending %d bytes, but actually only sent %d bytes", expected, actual)
+			fmt.Fprint(caller.ssh, err.Error())
+			return
+		}
+		buffer.Reset()
+	}
+
+	// Wait a bit to receive data from the server (that we would send to io.Stdout).
+	time.Sleep(3 * time.Millisecond)
+}
+
+func scannerSplitFunc(data []byte, atEOF bool) (advance int, token []byte, err error) {
+	if atEOF {
+		return 0, nil, nil
+	}
+	return bufio.ScanLines(data, atEOF)
+}
+
+func telnetHandler(host *Host) ssh.Handler {
+	return func(s ssh.Session) {
+		// FIXME: log session in db
+		//actx := s.Context().Value(authContextKey).(*authContext)
+		caller := bastionTelnetCaller{ssh: s}
+		if err := telnet.DialToAndCall(host.DialAddr(), caller); err != nil {
+			fmt.Fprintf(s, "error: %v", err)
+		}
+	}
+}

util.go

@@ -4,10 +4,17 @@ import "math/rand"
 
 const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
 
-func RandStringBytes(n int) string {
+func randStringBytes(n int) string {
 	b := make([]byte, n)
 	for i := range b {
 		b[i] = letterBytes[rand.Intn(len(letterBytes))]
 	}
 	return string(b)
 }
+
+func wrapText(in string, length int) string {
+	if len(in) <= length {
+		return in
+	}
+	return in[0:length-3] + "..."
+}

vendor/github.com/arkan/bastion/LICENSE

@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2016-2017 Florian Bertholin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

vendor/github.com/arkan/bastion/pkg/logchannel/logchannel.go

@@ -0,0 +1,54 @@
+package logchannel
+
+import (
+	"encoding/binary"
+	"io"
+	"syscall"
+	"time"
+
+	"golang.org/x/crypto/ssh"
+)
+
+type logChannel struct {
+	channel ssh.Channel
+	writer  io.WriteCloser
+}
+
+func writeTTYRecHeader(fd io.Writer, length int) {
+	t := time.Now()
+
+	tv := syscall.NsecToTimeval(t.UnixNano())
+
+	binary.Write(fd, binary.LittleEndian, int32(tv.Sec))
+	binary.Write(fd, binary.LittleEndian, int32(tv.Usec))
+	binary.Write(fd, binary.LittleEndian, int32(length))
+}
+
+func New(channel ssh.Channel, writer io.WriteCloser) *logChannel {
+	return &logChannel{
+		channel: channel,
+		writer:  writer,
+	}
+}
+
+func (l *logChannel) Read(data []byte) (int, error) {
+	return l.Read(data)
+}
+
+func (l *logChannel) Write(data []byte) (int, error) {
+	writeTTYRecHeader(l.writer, len(data))
+	l.writer.Write(data)
+
+	return l.channel.Write(data)
+}
+
+func (l *logChannel) LogWrite(data []byte) (int, error) {
+	writeTTYRecHeader(l.writer, len(data))
+	return l.writer.Write(data)
+}
+
+func (l *logChannel) Close() error {
+	l.writer.Close()
+
+	return l.channel.Close()
+}

vendor/github.com/dustin/go-humanize/LICENSE

@@ -0,0 +1,21 @@
+Copyright (c) 2005-2008  Dustin Sallings <dustin@spy.net>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+<http://www.opensource.org/licenses/mit-license.php>

vendor/github.com/dustin/go-humanize/README.markdown

@@ -0,0 +1,92 @@
+# Humane Units [![Build Status](https://travis-ci.org/dustin/go-humanize.svg?branch=master)](https://travis-ci.org/dustin/go-humanize) [![GoDoc](https://godoc.org/github.com/dustin/go-humanize?status.svg)](https://godoc.org/github.com/dustin/go-humanize)
+
+Just a few functions for helping humanize times and sizes.
+
+`go get` it as `github.com/dustin/go-humanize`, import it as
+`"github.com/dustin/go-humanize"`, use it as `humanize`
+
+See [godoc](https://godoc.org/github.com/dustin/go-humanize) for
+complete documentation.
+
+## Sizes
+
+This lets you take numbers like `82854982` and convert them to useful
+strings like, `83MB` or `79MiB` (whichever you prefer).
+
+Example:
+
+```go
+fmt.Printf("That file is %s.", humanize.Bytes(82854982))
+```
+
+## Times
+
+This lets you take a `time.Time` and spit it out in relative terms.
+For example, `12 seconds ago` or `3 days from now`.
+
+Example:
+
+```go
+fmt.Printf("This was touched %s", humanize.Time(someTimeInstance))
+```
+
+Thanks to Kyle Lemons for the time implementation from an IRC
+conversation one day.  It's pretty neat.
+
+## Ordinals
+
+From a [mailing list discussion][odisc] where a user wanted to be able
+to label ordinals.
+
+    0 -> 0th
+    1 -> 1st
+    2 -> 2nd
+    3 -> 3rd
+    4 -> 4th
+    [...]
+
+Example:
+
+```go
+fmt.Printf("You're my %s best friend.", humanize.Ordinal(193))
+```
+
+## Commas
+
+Want to shove commas into numbers?  Be my guest.
+
+    0 -> 0
+    100 -> 100
+    1000 -> 1,000
+    1000000000 -> 1,000,000,000
+    -100000 -> -100,000
+
+Example:
+
+```go
+fmt.Printf("You owe $%s.\n", humanize.Comma(6582491))
+```
+
+## Ftoa
+
+Nicer float64 formatter that removes trailing zeros.
+
+```go
+fmt.Printf("%f", 2.24)                   // 2.240000
+fmt.Printf("%s", humanize.Ftoa(2.24))    // 2.24
+fmt.Printf("%f", 2.0)                    // 2.000000
+fmt.Printf("%s", humanize.Ftoa(2.0))     // 2
+```
+
+## SI notation
+
+Format numbers with [SI notation][sinotation].
+
+Example:
+
+```go
+humanize.SI(0.00000000223, "M")    // 2.23nM
+```
+
+[odisc]: https://groups.google.com/d/topic/golang-nuts/l8NhI74jl-4/discussion
+[sinotation]: http://en.wikipedia.org/wiki/Metric_prefix

vendor/github.com/dustin/go-humanize/big.go

@@ -0,0 +1,31 @@
+package humanize
+
+import (
+	"math/big"
+)
+
+// order of magnitude (to a max order)
+func oomm(n, b *big.Int, maxmag int) (float64, int) {
+	mag := 0
+	m := &big.Int{}
+	for n.Cmp(b) >= 0 {
+		n.DivMod(n, b, m)
+		mag++
+		if mag == maxmag && maxmag >= 0 {
+			break
+		}
+	}
+	return float64(n.Int64()) + (float64(m.Int64()) / float64(b.Int64())), mag
+}
+
+// total order of magnitude
+// (same as above, but with no upper limit)
+func oom(n, b *big.Int) (float64, int) {
+	mag := 0
+	m := &big.Int{}
+	for n.Cmp(b) >= 0 {
+		n.DivMod(n, b, m)
+		mag++
+	}
+	return float64(n.Int64()) + (float64(m.Int64()) / float64(b.Int64())), mag
+}

vendor/github.com/dustin/go-humanize/bigbytes.go

@@ -0,0 +1,173 @@
+package humanize
+
+import (
+	"fmt"
+	"math/big"
+	"strings"
+	"unicode"
+)
+
+var (
+	bigIECExp = big.NewInt(1024)
+
+	// BigByte is one byte in bit.Ints
+	BigByte = big.NewInt(1)
+	// BigKiByte is 1,024 bytes in bit.Ints
+	BigKiByte = (&big.Int{}).Mul(BigByte, bigIECExp)
+	// BigMiByte is 1,024 k bytes in bit.Ints
+	BigMiByte = (&big.Int{}).Mul(BigKiByte, bigIECExp)
+	// BigGiByte is 1,024 m bytes in bit.Ints
+	BigGiByte = (&big.Int{}).Mul(BigMiByte, bigIECExp)
+	// BigTiByte is 1,024 g bytes in bit.Ints
+	BigTiByte = (&big.Int{}).Mul(BigGiByte, bigIECExp)
+	// BigPiByte is 1,024 t bytes in bit.Ints
+	BigPiByte = (&big.Int{}).Mul(BigTiByte, bigIECExp)
+	// BigEiByte is 1,024 p bytes in bit.Ints
+	BigEiByte = (&big.Int{}).Mul(BigPiByte, bigIECExp)
+	// BigZiByte is 1,024 e bytes in bit.Ints
+	BigZiByte = (&big.Int{}).Mul(BigEiByte, bigIECExp)
+	// BigYiByte is 1,024 z bytes in bit.Ints
+	BigYiByte = (&big.Int{}).Mul(BigZiByte, bigIECExp)
+)
+
+var (
+	bigSIExp = big.NewInt(1000)
+
+	// BigSIByte is one SI byte in big.Ints
+	BigSIByte = big.NewInt(1)
+	// BigKByte is 1,000 SI bytes in big.Ints
+	BigKByte = (&big.Int{}).Mul(BigSIByte, bigSIExp)
+	// BigMByte is 1,000 SI k bytes in big.Ints
+	BigMByte = (&big.Int{}).Mul(BigKByte, bigSIExp)
+	// BigGByte is 1,000 SI m bytes in big.Ints
+	BigGByte = (&big.Int{}).Mul(BigMByte, bigSIExp)
+	// BigTByte is 1,000 SI g bytes in big.Ints
+	BigTByte = (&big.Int{}).Mul(BigGByte, bigSIExp)
+	// BigPByte is 1,000 SI t bytes in big.Ints
+	BigPByte = (&big.Int{}).Mul(BigTByte, bigSIExp)
+	// BigEByte is 1,000 SI p bytes in big.Ints
+	BigEByte = (&big.Int{}).Mul(BigPByte, bigSIExp)
+	// BigZByte is 1,000 SI e bytes in big.Ints
+	BigZByte = (&big.Int{}).Mul(BigEByte, bigSIExp)
+	// BigYByte is 1,000 SI z bytes in big.Ints
+	BigYByte = (&big.Int{}).Mul(BigZByte, bigSIExp)
+)
+
+var bigBytesSizeTable = map[string]*big.Int{
+	"b":   BigByte,
+	"kib": BigKiByte,
+	"kb":  BigKByte,
+	"mib": BigMiByte,
+	"mb":  BigMByte,
+	"gib": BigGiByte,
+	"gb":  BigGByte,
+	"tib": BigTiByte,
+	"tb":  BigTByte,
+	"pib": BigPiByte,
+	"pb":  BigPByte,
+	"eib": BigEiByte,
+	"eb":  BigEByte,
+	"zib": BigZiByte,
+	"zb":  BigZByte,
+	"yib": BigYiByte,
+	"yb":  BigYByte,
+	// Without suffix
+	"":   BigByte,
+	"ki": BigKiByte,
+	"k":  BigKByte,
+	"mi": BigMiByte,
+	"m":  BigMByte,
+	"gi": BigGiByte,
+	"g":  BigGByte,
+	"ti": BigTiByte,
+	"t":  BigTByte,
+	"pi": BigPiByte,
+	"p":  BigPByte,
+	"ei": BigEiByte,
+	"e":  BigEByte,
+	"z":  BigZByte,
+	"zi": BigZiByte,
+	"y":  BigYByte,
+	"yi": BigYiByte,
+}
+
+var ten = big.NewInt(10)
+
+func humanateBigBytes(s, base *big.Int, sizes []string) string {
+	if s.Cmp(ten) < 0 {
+		return fmt.Sprintf("%d B", s)
+	}
+	c := (&big.Int{}).Set(s)
+	val, mag := oomm(c, base, len(sizes)-1)
+	suffix := sizes[mag]
+	f := "%.0f %s"
+	if val < 10 {
+		f = "%.1f %s"
+	}
+
+	return fmt.Sprintf(f, val, suffix)
+
+}
+
+// BigBytes produces a human readable representation of an SI size.
+//
+// See also: ParseBigBytes.
+//
+// BigBytes(82854982) -> 83MB
+func BigBytes(s *big.Int) string {
+	sizes := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
+	return humanateBigBytes(s, bigSIExp, sizes)
+}
+
+// BigIBytes produces a human readable representation of an IEC size.
+//
+// See also: ParseBigBytes.
+//
+// BigIBytes(82854982) -> 79MiB
+func BigIBytes(s *big.Int) string {
+	sizes := []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
+	return humanateBigBytes(s, bigIECExp, sizes)
+}
+
+// ParseBigBytes parses a string representation of bytes into the number
+// of bytes it represents.
+//
+// See also: BigBytes, BigIBytes.
+//
+// ParseBigBytes("42MB") -> 42000000, nil
+// ParseBigBytes("42mib") -> 44040192, nil
+func ParseBigBytes(s string) (*big.Int, error) {
+	lastDigit := 0
+	hasComma := false
+	for _, r := range s {
+		if !(unicode.IsDigit(r) || r == '.' || r == ',') {
+			break
+		}
+		if r == ',' {
+			hasComma = true
+		}
+		lastDigit++
+	}
+
+	num := s[:lastDigit]
+	if hasComma {
+		num = strings.Replace(num, ",", "", -1)
+	}
+
+	val := &big.Rat{}
+	_, err := fmt.Sscanf(num, "%f", val)
+	if err != nil {
+		return nil, err
+	}
+
+	extra := strings.ToLower(strings.TrimSpace(s[lastDigit:]))
+	if m, ok := bigBytesSizeTable[extra]; ok {
+		mv := (&big.Rat{}).SetInt(m)
+		val.Mul(val, mv)
+		rv := &big.Int{}
+		rv.Div(val.Num(), val.Denom())
+		return rv, nil
+	}
+
+	return nil, fmt.Errorf("unhandled size name: %v", extra)
+}

vendor/github.com/dustin/go-humanize/bytes.go

@@ -0,0 +1,143 @@
+package humanize
+
+import (
+	"fmt"
+	"math"
+	"strconv"
+	"strings"
+	"unicode"
+)
+
+// IEC Sizes.
+// kibis of bits
+const (
+	Byte = 1 << (iota * 10)
+	KiByte
+	MiByte
+	GiByte
+	TiByte
+	PiByte
+	EiByte
+)
+
+// SI Sizes.
+const (
+	IByte = 1
+	KByte = IByte * 1000
+	MByte = KByte * 1000
+	GByte = MByte * 1000
+	TByte = GByte * 1000
+	PByte = TByte * 1000
+	EByte = PByte * 1000
+)
+
+var bytesSizeTable = map[string]uint64{
+	"b":   Byte,
+	"kib": KiByte,
+	"kb":  KByte,
+	"mib": MiByte,
+	"mb":  MByte,
+	"gib": GiByte,
+	"gb":  GByte,
+	"tib": TiByte,
+	"tb":  TByte,
+	"pib": PiByte,
+	"pb":  PByte,
+	"eib": EiByte,
+	"eb":  EByte,
+	// Without suffix
+	"":   Byte,
+	"ki": KiByte,
+	"k":  KByte,
+	"mi": MiByte,
+	"m":  MByte,
+	"gi": GiByte,
+	"g":  GByte,
+	"ti": TiByte,
+	"t":  TByte,
+	"pi": PiByte,
+	"p":  PByte,
+	"ei": EiByte,
+	"e":  EByte,
+}
+
+func logn(n, b float64) float64 {
+	return math.Log(n) / math.Log(b)
+}
+
+func humanateBytes(s uint64, base float64, sizes []string) string {
+	if s < 10 {
+		return fmt.Sprintf("%d B", s)
+	}
+	e := math.Floor(logn(float64(s), base))
+	suffix := sizes[int(e)]
+	val := math.Floor(float64(s)/math.Pow(base, e)*10+0.5) / 10
+	f := "%.0f %s"
+	if val < 10 {
+		f = "%.1f %s"
+	}
+
+	return fmt.Sprintf(f, val, suffix)
+}
+
+// Bytes produces a human readable representation of an SI size.
+//
+// See also: ParseBytes.
+//
+// Bytes(82854982) -> 83MB
+func Bytes(s uint64) string {
+	sizes := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB"}
+	return humanateBytes(s, 1000, sizes)
+}
+
+// IBytes produces a human readable representation of an IEC size.
+//
+// See also: ParseBytes.
+//
+// IBytes(82854982) -> 79MiB
+func IBytes(s uint64) string {
+	sizes := []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"}
+	return humanateBytes(s, 1024, sizes)
+}
+
+// ParseBytes parses a string representation of bytes into the number
+// of bytes it represents.
+//
+// See Also: Bytes, IBytes.
+//
+// ParseBytes("42MB") -> 42000000, nil
+// ParseBytes("42mib") -> 44040192, nil
+func ParseBytes(s string) (uint64, error) {
+	lastDigit := 0
+	hasComma := false
+	for _, r := range s {
+		if !(unicode.IsDigit(r) || r == '.' || r == ',') {
+			break
+		}
+		if r == ',' {
+			hasComma = true
+		}
+		lastDigit++
+	}
+
+	num := s[:lastDigit]
+	if hasComma {
+		num = strings.Replace(num, ",", "", -1)
+	}
+
+	f, err := strconv.ParseFloat(num, 64)
+	if err != nil {
+		return 0, err
+	}
+
+	extra := strings.ToLower(strings.TrimSpace(s[lastDigit:]))
+	if m, ok := bytesSizeTable[extra]; ok {
+		f *= float64(m)
+		if f >= math.MaxUint64 {
+			return 0, fmt.Errorf("too large: %v", s)
+		}
+		return uint64(f), nil
+	}
+
+	return 0, fmt.Errorf("unhandled size name: %v", extra)
+}

vendor/github.com/dustin/go-humanize/comma.go

@@ -0,0 +1,108 @@
+package humanize
+
+import (
+	"bytes"
+	"math"
+	"math/big"
+	"strconv"
+	"strings"
+)
+
+// Comma produces a string form of the given number in base 10 with
+// commas after every three orders of magnitude.
+//
+// e.g. Comma(834142) -> 834,142
+func Comma(v int64) string {
+	sign := ""
+
+	// minin64 can't be negated to a usable value, so it has to be special cased.
+	if v == math.MinInt64 {
+		return "-9,223,372,036,854,775,808"
+	}
+
+	if v < 0 {
+		sign = "-"
+		v = 0 - v
+	}
+
+	parts := []string{"", "", "", "", "", "", ""}
+	j := len(parts) - 1
+
+	for v > 999 {
+		parts[j] = strconv.FormatInt(v%1000, 10)
+		switch len(parts[j]) {
+		case 2:
+			parts[j] = "0" + parts[j]
+		case 1:
+			parts[j] = "00" + parts[j]
+		}
+		v = v / 1000
+		j--
+	}
+	parts[j] = strconv.Itoa(int(v))
+	return sign + strings.Join(parts[j:], ",")
+}
+
+// Commaf produces a string form of the given number in base 10 with
+// commas after every three orders of magnitude.
+//
+// e.g. Commaf(834142.32) -> 834,142.32
+func Commaf(v float64) string {
+	buf := &bytes.Buffer{}
+	if v < 0 {
+		buf.Write([]byte{'-'})
+		v = 0 - v
+	}
+
+	comma := []byte{','}
+
+	parts := strings.Split(strconv.FormatFloat(v, 'f', -1, 64), ".")
+	pos := 0
+	if len(parts[0])%3 != 0 {
+		pos += len(parts[0]) % 3
+		buf.WriteString(parts[0][:pos])
+		buf.Write(comma)
+	}
+	for ; pos < len(parts[0]); pos += 3 {
+		buf.WriteString(parts[0][pos : pos+3])
+		buf.Write(comma)
+	}
+	buf.Truncate(buf.Len() - 1)
+
+	if len(parts) > 1 {
+		buf.Write([]byte{'.'})
+		buf.WriteString(parts[1])
+	}
+	return buf.String()
+}
+
+// BigComma produces a string form of the given big.Int in base 10
+// with commas after every three orders of magnitude.
+func BigComma(b *big.Int) string {
+	sign := ""
+	if b.Sign() < 0 {
+		sign = "-"
+		b.Abs(b)
+	}
+
+	athousand := big.NewInt(1000)
+	c := (&big.Int{}).Set(b)
+	_, m := oom(c, athousand)
+	parts := make([]string, m+1)
+	j := len(parts) - 1
+
+	mod := &big.Int{}
+	for b.Cmp(athousand) >= 0 {
+		b.DivMod(b, athousand, mod)
+		parts[j] = strconv.FormatInt(mod.Int64(), 10)
+		switch len(parts[j]) {
+		case 2:
+			parts[j] = "0" + parts[j]
+		case 1:
+			parts[j] = "00" + parts[j]
+		}
+		j--
+	}
+	parts[j] = strconv.Itoa(int(b.Int64()))
+	return sign + strings.Join(parts[j:], ",")
+}

vendor/github.com/dustin/go-humanize/commaf.go

@@ -0,0 +1,40 @@
+// +build go1.6
+
+package humanize
+
+import (
+	"bytes"
+	"math/big"
+	"strings"
+)
+
+// BigCommaf produces a string form of the given big.Float in base 10
+// with commas after every three orders of magnitude.
+func BigCommaf(v *big.Float) string {
+	buf := &bytes.Buffer{}
+	if v.Sign() < 0 {
+		buf.Write([]byte{'-'})
+		v.Abs(v)
+	}
+
+	comma := []byte{','}
+
+	parts := strings.Split(v.Text('f', -1), ".")
+	pos := 0
+	if len(parts[0])%3 != 0 {
+		pos += len(parts[0]) % 3
+		buf.WriteString(parts[0][:pos])
+		buf.Write(comma)
+	}
+	for ; pos < len(parts[0]); pos += 3 {
+		buf.WriteString(parts[0][pos : pos+3])
+		buf.Write(comma)
+	}
+	buf.Truncate(buf.Len() - 1)
+
+	if len(parts) > 1 {
+		buf.Write([]byte{'.'})
+		buf.WriteString(parts[1])
+	}
+	return buf.String()
+}

vendor/github.com/dustin/go-humanize/ftoa.go

@@ -0,0 +1,23 @@
+package humanize
+
+import "strconv"
+
+func stripTrailingZeros(s string) string {
+	offset := len(s) - 1
+	for offset > 0 {
+		if s[offset] == '.' {
+			offset--
+			break
+		}
+		if s[offset] != '0' {
+			break
+		}
+		offset--
+	}
+	return s[:offset+1]
+}
+
+// Ftoa converts a float to a string with no trailing zeros.
+func Ftoa(num float64) string {
+	return stripTrailingZeros(strconv.FormatFloat(num, 'f', 6, 64))
+}

vendor/github.com/dustin/go-humanize/humanize.go

@@ -0,0 +1,8 @@
+/*
+Package humanize converts boring ugly numbers to human-friendly strings and back.
+
+Durations can be turned into strings such as "3 days ago", numbers
+representing sizes like 82854982 into useful strings like, "83MB" or
+"79MiB" (whichever you prefer).
+*/
+package humanize

vendor/github.com/dustin/go-humanize/number.go

@@ -0,0 +1,192 @@
+package humanize
+
+/*
+Slightly adapted from the source to fit go-humanize.
+
+Author: https://github.com/gorhill
+Source: https://gist.github.com/gorhill/5285193
+
+*/
+
+import (
+	"math"
+	"strconv"
+)
+
+var (
+	renderFloatPrecisionMultipliers = [...]float64{
+		1,
+		10,
+		100,
+		1000,
+		10000,
+		100000,
+		1000000,
+		10000000,
+		100000000,
+		1000000000,
+	}
+
+	renderFloatPrecisionRounders = [...]float64{
+		0.5,
+		0.05,
+		0.005,
+		0.0005,
+		0.00005,
+		0.000005,
+		0.0000005,
+		0.00000005,
+		0.000000005,
+		0.0000000005,
+	}
+)
+
+// FormatFloat produces a formatted number as string based on the following user-specified criteria:
+// * thousands separator
+// * decimal separator
+// * decimal precision
+//
+// Usage: s := RenderFloat(format, n)
+// The format parameter tells how to render the number n.
+//
+// See examples: http://play.golang.org/p/LXc1Ddm1lJ
+//
+// Examples of format strings, given n = 12345.6789:
+// "#,###.##" => "12,345.67"
+// "#,###." => "12,345"
+// "#,###" => "12345,678"
+// "#\u202F###,##" => "12 345,68"
+// "#.###,###### => 12.345,678900
+// "" (aka default format) => 12,345.67
+//
+// The highest precision allowed is 9 digits after the decimal symbol.
+// There is also a version for integer number, FormatInteger(),
+// which is convenient for calls within template.
+func FormatFloat(format string, n float64) string {
+	// Special cases:
+	//   NaN = "NaN"
+	//   +Inf = "+Infinity"
+	//   -Inf = "-Infinity"
+	if math.IsNaN(n) {
+		return "NaN"
+	}
+	if n > math.MaxFloat64 {
+		return "Infinity"
+	}
+	if n < -math.MaxFloat64 {
+		return "-Infinity"
+	}
+
+	// default format
+	precision := 2
+	decimalStr := "."
+	thousandStr := ","
+	positiveStr := ""
+	negativeStr := "-"
+
+	if len(format) > 0 {
+		format := []rune(format)
+
+		// If there is an explicit format directive,
+		// then default values are these:
+		precision = 9
+		thousandStr = ""
+
+		// collect indices of meaningful formatting directives
+		formatIndx := []int{}
+		for i, char := range format {
+			if char != '#' && char != '0' {
+				formatIndx = append(formatIndx, i)
+			}
+		}
+
+		if len(formatIndx) > 0 {
+			// Directive at index 0:
+			//   Must be a '+'
+			//   Raise an error if not the case
+			// index: 0123456789
+			//        +0.000,000
+			//        +000,000.0
+			//        +0000.00
+			//        +0000
+			if formatIndx[0] == 0 {
+				if format[formatIndx[0]] != '+' {
+					panic("RenderFloat(): invalid positive sign directive")
+				}
+				positiveStr = "+"
+				formatIndx = formatIndx[1:]
+			}
+
+			// Two directives:
+			//   First is thousands separator
+			//   Raise an error if not followed by 3-digit
+			// 0123456789
+			// 0.000,000
+			// 000,000.00
+			if len(formatIndx) == 2 {
+				if (formatIndx[1] - formatIndx[0]) != 4 {
+					panic("RenderFloat(): thousands separator directive must be followed by 3 digit-specifiers")
+				}
+				thousandStr = string(format[formatIndx[0]])
+				formatIndx = formatIndx[1:]
+			}
+
+			// One directive:
+			//   Directive is decimal separator
+			//   The number of digit-specifier following the separator indicates wanted precision
+			// 0123456789
+			// 0.00
+			// 000,0000
+			if len(formatIndx) == 1 {
+				decimalStr = string(format[formatIndx[0]])
+				precision = len(format) - formatIndx[0] - 1
+			}
+		}
+	}
+
+	// generate sign part
+	var signStr string
+	if n >= 0.000000001 {
+		signStr = positiveStr
+	} else if n <= -0.000000001 {
+		signStr = negativeStr
+		n = -n
+	} else {
+		signStr = ""
+		n = 0.0
+	}
+
+	// split number into integer and fractional parts
+	intf, fracf := math.Modf(n + renderFloatPrecisionRounders[precision])
+
+	// generate integer part string
+	intStr := strconv.FormatInt(int64(intf), 10)
+
+	// add thousand separator if required
+	if len(thousandStr) > 0 {
+		for i := len(intStr); i > 3; {
+			i -= 3
+			intStr = intStr[:i] + thousandStr + intStr[i:]
+		}
+	}
+
+	// no fractional part, we can leave now
+	if precision == 0 {
+		return signStr + intStr
+	}
+
+	// generate fractional part
+	fracStr := strconv.Itoa(int(fracf * renderFloatPrecisionMultipliers[precision]))
+	// may need padding
+	if len(fracStr) < precision {
+		fracStr = "000000000000000"[:precision-len(fracStr)] + fracStr
+	}
+
+	return signStr + intStr + decimalStr + fracStr
+}
+
+// FormatInteger produces a formatted number as string.
+// See FormatFloat.
+func FormatInteger(format string, n int) string {
+	return FormatFloat(format, float64(n))
+}

vendor/github.com/dustin/go-humanize/ordinals.go

@@ -0,0 +1,25 @@
+package humanize
+
+import "strconv"
+
+// Ordinal gives you the input number in a rank/ordinal format.
+//
+// Ordinal(3) -> 3rd
+func Ordinal(x int) string {
+	suffix := "th"
+	switch x % 10 {
+	case 1:
+		if x%100 != 11 {
+			suffix = "st"
+		}
+	case 2:
+		if x%100 != 12 {
+			suffix = "nd"
+		}
+	case 3:
+		if x%100 != 13 {
+			suffix = "rd"
+		}
+	}
+	return strconv.Itoa(x) + suffix
+}

vendor/github.com/dustin/go-humanize/si.go

@@ -0,0 +1,113 @@
+package humanize
+
+import (
+	"errors"
+	"math"
+	"regexp"
+	"strconv"
+)
+
+var siPrefixTable = map[float64]string{
+	-24: "y", // yocto
+	-21: "z", // zepto
+	-18: "a", // atto
+	-15: "f", // femto
+	-12: "p", // pico
+	-9:  "n", // nano
+	-6:  "µ", // micro
+	-3:  "m", // milli
+	0:   "",
+	3:   "k", // kilo
+	6:   "M", // mega
+	9:   "G", // giga
+	12:  "T", // tera
+	15:  "P", // peta
+	18:  "E", // exa
+	21:  "Z", // zetta
+	24:  "Y", // yotta
+}
+
+var revSIPrefixTable = revfmap(siPrefixTable)
+
+// revfmap reverses the map and precomputes the power multiplier
+func revfmap(in map[float64]string) map[string]float64 {
+	rv := map[string]float64{}
+	for k, v := range in {
+		rv[v] = math.Pow(10, k)
+	}
+	return rv
+}
+
+var riParseRegex *regexp.Regexp
+
+func init() {
+	ri := `^([\-0-9.]+)\s?([`
+	for _, v := range siPrefixTable {
+		ri += v
+	}
+	ri += `]?)(.*)`
+
+	riParseRegex = regexp.MustCompile(ri)
+}
+
+// ComputeSI finds the most appropriate SI prefix for the given number
+// and returns the prefix along with the value adjusted to be within
+// that prefix.
+//
+// See also: SI, ParseSI.
+//
+// e.g. ComputeSI(2.2345e-12) -> (2.2345, "p")
+func ComputeSI(input float64) (float64, string) {
+	if input == 0 {
+		return 0, ""
+	}
+	mag := math.Abs(input)
+	exponent := math.Floor(logn(mag, 10))
+	exponent = math.Floor(exponent/3) * 3
+
+	value := mag / math.Pow(10, exponent)
+
+	// Handle special case where value is exactly 1000.0
+	// Should return 1M instead of 1000k
+	if value == 1000.0 {
+		exponent += 3
+		value = mag / math.Pow(10, exponent)
+	}
+
+	value = math.Copysign(value, input)
+
+	prefix := siPrefixTable[exponent]
+	return value, prefix
+}
+
+// SI returns a string with default formatting.
+//
+// SI uses Ftoa to format float value, removing trailing zeros.
+//
+// See also: ComputeSI, ParseSI.
+//
+// e.g. SI(1000000, B) -> 1MB
+// e.g. SI(2.2345e-12, "F") -> 2.2345pF
+func SI(input float64, unit string) string {
+	value, prefix := ComputeSI(input)
+	return Ftoa(value) + " " + prefix + unit
+}
+
+var errInvalid = errors.New("invalid input")
+
+// ParseSI parses an SI string back into the number and unit.
+//
+// See also: SI, ComputeSI.
+//
+// e.g. ParseSI(2.2345pF) -> (2.2345e-12, "F", nil)
+func ParseSI(input string) (float64, string, error) {
+	found := riParseRegex.FindStringSubmatch(input)
+	if len(found) != 4 {
+		return 0, "", errInvalid
+	}
+	mag := revSIPrefixTable[found[2]]
+	unit := found[3]
+
+	base, err := strconv.ParseFloat(found[1], 64)
+	return base * mag, unit, err
+}

vendor/github.com/dustin/go-humanize/times.go

@@ -0,0 +1,117 @@
+package humanize
+
+import (
+	"fmt"
+	"math"
+	"sort"
+	"time"
+)
+
+// Seconds-based time units
+const (
+	Day      = 24 * time.Hour
+	Week     = 7 * Day
+	Month    = 30 * Day
+	Year     = 12 * Month
+	LongTime = 37 * Year
+)
+
+// Time formats a time into a relative string.
+//
+// Time(someT) -> "3 weeks ago"
+func Time(then time.Time) string {
+	return RelTime(then, time.Now(), "ago", "from now")
+}
+
+// A RelTimeMagnitude struct contains a relative time point at which
+// the relative format of time will switch to a new format string.  A
+// slice of these in ascending order by their "D" field is passed to
+// CustomRelTime to format durations.
+//
+// The Format field is a string that may contain a "%s" which will be
+// replaced with the appropriate signed label (e.g. "ago" or "from
+// now") and a "%d" that will be replaced by the quantity.
+//
+// The DivBy field is the amount of time the time difference must be
+// divided by in order to display correctly.
+//
+// e.g. if D is 2*time.Minute and you want to display "%d minutes %s"
+// DivBy should be time.Minute so whatever the duration is will be
+// expressed in minutes.
+type RelTimeMagnitude struct {
+	D      time.Duration
+	Format string
+	DivBy  time.Duration
+}
+
+var defaultMagnitudes = []RelTimeMagnitude{
+	{time.Second, "now", time.Second},
+	{2 * time.Second, "1 second %s", 1},
+	{time.Minute, "%d seconds %s", time.Second},
+	{2 * time.Minute, "1 minute %s", 1},
+	{time.Hour, "%d minutes %s", time.Minute},
+	{2 * time.Hour, "1 hour %s", 1},
+	{Day, "%d hours %s", time.Hour},
+	{2 * Day, "1 day %s", 1},
+	{Week, "%d days %s", Day},
+	{2 * Week, "1 week %s", 1},
+	{Month, "%d weeks %s", Week},
+	{2 * Month, "1 month %s", 1},
+	{Year, "%d months %s", Month},
+	{18 * Month, "1 year %s", 1},
+	{2 * Year, "2 years %s", 1},
+	{LongTime, "%d years %s", Year},
+	{math.MaxInt64, "a long while %s", 1},
+}
+
+// RelTime formats a time into a relative string.
+//
+// It takes two times and two labels.  In addition to the generic time
+// delta string (e.g. 5 minutes), the labels are used applied so that
+// the label corresponding to the smaller time is applied.
+//
+// RelTime(timeInPast, timeInFuture, "earlier", "later") -> "3 weeks earlier"
+func RelTime(a, b time.Time, albl, blbl string) string {
+	return CustomRelTime(a, b, albl, blbl, defaultMagnitudes)
+}
+
+// CustomRelTime formats a time into a relative string.
+//
+// It takes two times two labels and a table of relative time formats.
+// In addition to the generic time delta string (e.g. 5 minutes), the
+// labels are used applied so that the label corresponding to the
+// smaller time is applied.
+func CustomRelTime(a, b time.Time, albl, blbl string, magnitudes []RelTimeMagnitude) string {
+	lbl := albl
+	diff := b.Sub(a)
+
+	if a.After(b) {
+		lbl = blbl
+		diff = a.Sub(b)
+	}
+
+	n := sort.Search(len(magnitudes), func(i int) bool {
+		return magnitudes[i].D >= diff
+	})
+
+	if n >= len(magnitudes) {
+		n = len(magnitudes) - 1
+	}
+	mag := magnitudes[n]
+	args := []interface{}{}
+	escaped := false
+	for _, ch := range mag.Format {
+		if escaped {
+			switch ch {
+			case 's':
+				args = append(args, lbl)
+			case 'd':
+				args = append(args, diff/mag.DivBy)
+			}
+			escaped = false
+		} else {
+			escaped = ch == '%'
+		}
+	}
+	return fmt.Sprintf(mag.Format, args...)
+}

vendor/github.com/gliderlabs/ssh/README.md

@@ -14,7 +14,7 @@ package](https://godoc.org/golang.org/x/crypto/ssh) with a higher-level API for
 building SSH servers. The goal of the API was to make it as simple as using
 [net/http](https://golang.org/pkg/net/http/), so the API is very similar:
 
-```
+```go
  package main
 
  import (

vendor/github.com/gliderlabs/ssh/agent.go

@@ -22,8 +22,10 @@ const (
 // client requested agent forwarding
 var contextKeyAgentRequest = &contextKey{"auth-agent-req"}
 
-func setAgentRequested(sess *session) {
-	sess.ctx.SetValue(contextKeyAgentRequest, true)
+// SetAgentRequested sets up the session context so that AgentRequested
+// returns true.
+func SetAgentRequested(ctx Context) {
+	ctx.SetValue(contextKeyAgentRequest, true)
 }
 
 // AgentRequested returns true if the client requested agent forwarding.

vendor/github.com/gliderlabs/ssh/context.go

@@ -103,7 +103,7 @@ func newContext(srv *Server) (*sshContext, context.CancelFunc) {
 
 // this is separate from newContext because we will get ConnMetadata
 // at different points so it needs to be applied separately
-func (ctx *sshContext) applyConnMetadata(conn gossh.ConnMetadata) {
+func applyConnMetadata(ctx Context, conn gossh.ConnMetadata) {
 	if ctx.Value(ContextKeySessionID) != nil {
 		return
 	}

vendor/github.com/gliderlabs/ssh/server.go

@@ -26,6 +26,7 @@ type Server struct {
 
 	PasswordHandler             PasswordHandler             // password authentication handler
 	PublicKeyHandler            PublicKeyHandler            // public key authentication handler
+	ChannelHandler              ChannelHandler              // channel handler
 	PtyCallback                 PtyCallback                 // callback for allowing PTY sessions, allows all if nil
 	ConnCallback                ConnCallback                // optional callback for wrapping net.Conn before handling
 	LocalPortForwardingCallback LocalPortForwardingCallback // callback for allowing local port forwarding, denies all if nil
@@ -33,16 +34,13 @@ type Server struct {
 	IdleTimeout time.Duration // connection timeout when no activity, none if empty
 	MaxTimeout  time.Duration // absolute connection timeout, none if empty
 
-	channelHandlers map[string]channelHandler
-
 	mu        sync.Mutex
 	listeners map[net.Listener]struct{}
 	conns     map[*gossh.ServerConn]struct{}
 	doneChan  chan struct{}
 }
 
-// internal for now
-type channelHandler func(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx *sshContext)
+type ChannelHandler func(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx Context)
 
 func (srv *Server) ensureHostSigner() error {
 	if len(srv.HostSigners) == 0 {
@@ -55,11 +53,7 @@ func (srv *Server) ensureHostSigner() error {
 	return nil
 }
 
-func (srv *Server) config(ctx *sshContext) *gossh.ServerConfig {
-	srv.channelHandlers = map[string]channelHandler{
-		"session":      sessionHandler,
-		"direct-tcpip": directTcpipHandler,
-	}
+func (srv *Server) config(ctx Context) *gossh.ServerConfig {
 	config := &gossh.ServerConfig{}
 	for _, signer := range srv.HostSigners {
 		config.AddHostKey(signer)
@@ -72,7 +66,7 @@ func (srv *Server) config(ctx *sshContext) *gossh.ServerConfig {
 	}
 	if srv.PasswordHandler != nil {
 		config.PasswordCallback = func(conn gossh.ConnMetadata, password []byte) (*gossh.Permissions, error) {
-			ctx.applyConnMetadata(conn)
+			applyConnMetadata(ctx, conn)
 			if ok := srv.PasswordHandler(ctx, string(password)); !ok {
 				return ctx.Permissions().Permissions, fmt.Errorf("permission denied")
 			}
@@ -81,7 +75,7 @@ func (srv *Server) config(ctx *sshContext) *gossh.ServerConfig {
 	}
 	if srv.PublicKeyHandler != nil {
 		config.PublicKeyCallback = func(conn gossh.ConnMetadata, key gossh.PublicKey) (*gossh.Permissions, error) {
-			ctx.applyConnMetadata(conn)
+			applyConnMetadata(ctx, conn)
 			if ok := srv.PublicKeyHandler(ctx, key); !ok {
 				return ctx.Permissions().Permissions, fmt.Errorf("permission denied")
 			}
@@ -223,15 +217,25 @@ func (srv *Server) handleConn(newConn net.Conn) {
 	defer srv.trackConn(sshConn, false)
 
 	ctx.SetValue(ContextKeyConn, sshConn)
-	ctx.applyConnMetadata(sshConn)
+	applyConnMetadata(ctx, sshConn)
 	go gossh.DiscardRequests(reqs)
 	for ch := range chans {
-		handler, found := srv.channelHandlers[ch.ChannelType()]
-		if !found {
-			ch.Reject(gossh.UnknownChannelType, "unsupported channel type")
-			continue
+		if srv.ChannelHandler == nil {
+			DefaultChannelHandler(srv, sshConn, ch, ctx)
+		} else {
+			srv.ChannelHandler(srv, sshConn, ch, ctx)
 		}
-		go handler(srv, sshConn, ch, ctx)
+	}
+}
+
+func DefaultChannelHandler(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx Context) {
+	switch newChan.ChannelType() {
+	case "session":
+		go sessionHandler(srv, conn, newChan, ctx)
+	case "direct-tcpip":
+		go directTcpipHandler(srv, conn, newChan, ctx)
+	default:
+		newChan.Reject(gossh.UnknownChannelType, "unsupported channel type")
 	}
 }
 

vendor/github.com/gliderlabs/ssh/session.go

@@ -71,27 +71,24 @@ type Session interface {
 	// If there are buffered signals when a channel is registered, they will be
 	// sent in order on the channel immediately after registering.
 	Signals(c chan<- Signal)
-
-	MaskedReqs() chan *gossh.Request
 }
 
 // maxSigBufSize is how many signals will be buffered
 // when there is no signal channel specified
 const maxSigBufSize = 128
 
-func sessionHandler(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx *sshContext) {
+func sessionHandler(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx Context) {
 	ch, reqs, err := newChan.Accept()
 	if err != nil {
 		// TODO: trigger event callback
 		return
 	}
 	sess := &session{
-		Channel:    ch,
-		conn:       conn,
-		handler:    srv.Handler,
-		ptyCb:      srv.PtyCallback,
-		maskedReqs: make(chan *gossh.Request, 5),
-		ctx:        ctx,
+		Channel: ch,
+		conn:    conn,
+		handler: srv.Handler,
+		ptyCb:   srv.PtyCallback,
+		ctx:     ctx,
 	}
 	sess.handleRequests(reqs)
 }
@@ -99,19 +96,18 @@ func sessionHandler(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChanne
 type session struct {
 	sync.Mutex
 	gossh.Channel
-	conn       *gossh.ServerConn
-	handler    Handler
-	handled    bool
-	exited     bool
-	pty        *Pty
-	winch      chan Window
-	env        []string
-	ptyCb      PtyCallback
-	cmd        []string
-	ctx        *sshContext
-	sigCh      chan<- Signal
-	sigBuf     []Signal
-	maskedReqs chan *gossh.Request
+	conn    *gossh.ServerConn
+	handler Handler
+	handled bool
+	exited  bool
+	pty     *Pty
+	winch   chan Window
+	env     []string
+	ptyCb   PtyCallback
+	cmd     []string
+	ctx     Context
+	sigCh   chan<- Signal
+	sigBuf  []Signal
 }
 
 func (sess *session) Write(p []byte) (n int, err error) {
@@ -146,13 +142,12 @@ func (sess *session) Permissions() Permissions {
 }
 
 func (sess *session) Context() context.Context {
-	return sess.ctx.Context
+	return sess.ctx
 }
 
 func (sess *session) Exit(code int) error {
 	sess.Lock()
 	defer sess.Unlock()
-
 	if sess.exited {
 		return errors.New("Session.Exit called multiple times")
 	}
@@ -163,9 +158,6 @@ func (sess *session) Exit(code int) error {
 	if err != nil {
 		return err
 	}
-
-	close(sess.maskedReqs)
-
 	return sess.Close()
 }
 
@@ -209,10 +201,6 @@ func (sess *session) Signals(c chan<- Signal) {
 	}
 }
 
-func (sess *session) MaskedReqs() chan *gossh.Request {
-	return sess.maskedReqs
-}
-
 func (sess *session) handleRequests(reqs <-chan *gossh.Request) {
 	for req := range reqs {
 		switch req.Type {
@@ -290,12 +278,10 @@ func (sess *session) handleRequests(reqs <-chan *gossh.Request) {
 			req.Reply(ok, nil)
 		case agentRequestType:
 			// TODO: option/callback to allow agent forwarding
-			setAgentRequested(sess)
+			SetAgentRequested(sess.ctx)
 			req.Reply(true, nil)
 		default:
 			// TODO: debug log
 		}
-
-		sess.maskedReqs <- req
 	}
 }

vendor/github.com/gliderlabs/ssh/tcpip.go

@@ -17,7 +17,7 @@ type forwardData struct {
 	OriginatorPort uint32
 }
 
-func directTcpipHandler(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx *sshContext) {
+func directTcpipHandler(srv *Server, conn *gossh.ServerConn, newChan gossh.NewChannel, ctx Context) {
 	d := forwardData{}
 	if err := gossh.Unmarshal(newChan.ExtraData(), &d); err != nil {
 		newChan.Reject(gossh.ConnectionFailed, "error parsing forward data: "+err.Error())

vendor/github.com/gliderlabs/ssh/util.go

@@ -9,7 +9,7 @@ import (
 )
 
 func generateSigner() (ssh.Signer, error) {
-	key, err := rsa.GenerateKey(rand.Reader, 768)
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
 	if err != nil {
 		return nil, err
 	}

vendor/github.com/kr/pty/License

@@ -0,0 +1,23 @@
+Copyright (c) 2011 Keith Rarick
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall
+be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/kr/pty/README.md

@@ -0,0 +1,36 @@
+# pty
+
+Pty is a Go package for using unix pseudo-terminals.
+
+## Install
+
+    go get github.com/kr/pty
+
+## Example
+
+```go
+package main
+
+import (
+	"github.com/kr/pty"
+	"io"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	c := exec.Command("grep", "--color=auto", "bar")
+	f, err := pty.Start(c)
+	if err != nil {
+		panic(err)
+	}
+
+	go func() {
+		f.Write([]byte("foo\n"))
+		f.Write([]byte("bar\n"))
+		f.Write([]byte("baz\n"))
+		f.Write([]byte{4}) // EOT
+	}()
+	io.Copy(os.Stdout, f)
+}
+```

vendor/github.com/kr/pty/doc.go

@@ -0,0 +1,16 @@
+// Package pty provides functions for working with Unix terminals.
+package pty
+
+import (
+	"errors"
+	"os"
+)
+
+// ErrUnsupported is returned if a function is not
+// available on the current platform.
+var ErrUnsupported = errors.New("unsupported")
+
+// Opens a pty and its corresponding tty.
+func Open() (pty, tty *os.File, err error) {
+	return open()
+}

vendor/github.com/kr/pty/ioctl.go

@@ -0,0 +1,13 @@
+// +build !windows
+
+package pty
+
+import "syscall"
+
+func ioctl(fd, cmd, ptr uintptr) error {
+	_, _, e := syscall.Syscall(syscall.SYS_IOCTL, fd, cmd, ptr)
+	if e != 0 {
+		return e
+	}
+	return nil
+}

vendor/github.com/kr/pty/ioctl_bsd.go

@@ -0,0 +1,39 @@
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package pty
+
+// from <sys/ioccom.h>
+const (
+	_IOC_VOID    uintptr = 0x20000000
+	_IOC_OUT     uintptr = 0x40000000
+	_IOC_IN      uintptr = 0x80000000
+	_IOC_IN_OUT  uintptr = _IOC_OUT | _IOC_IN
+	_IOC_DIRMASK         = _IOC_VOID | _IOC_OUT | _IOC_IN
+
+	_IOC_PARAM_SHIFT = 13
+	_IOC_PARAM_MASK  = (1 << _IOC_PARAM_SHIFT) - 1
+)
+
+func _IOC_PARM_LEN(ioctl uintptr) uintptr {
+	return (ioctl >> 16) & _IOC_PARAM_MASK
+}
+
+func _IOC(inout uintptr, group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return inout | (param_len&_IOC_PARAM_MASK)<<16 | uintptr(group)<<8 | ioctl_num
+}
+
+func _IO(group byte, ioctl_num uintptr) uintptr {
+	return _IOC(_IOC_VOID, group, ioctl_num, 0)
+}
+
+func _IOR(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_OUT, group, ioctl_num, param_len)
+}
+
+func _IOW(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_IN, group, ioctl_num, param_len)
+}
+
+func _IOWR(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_IN_OUT, group, ioctl_num, param_len)
+}

vendor/github.com/kr/pty/mktypes.bash

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+GOOSARCH="${GOOS}_${GOARCH}"
+case "$GOOSARCH" in
+_* | *_ | _)
+	echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
+	exit 1
+	;;
+esac
+
+GODEFS="go tool cgo -godefs"
+
+$GODEFS types.go |gofmt > ztypes_$GOARCH.go
+
+case $GOOS in
+freebsd|dragonfly)
+	$GODEFS types_$GOOS.go |gofmt > ztypes_$GOOSARCH.go
+	;;
+esac

vendor/github.com/kr/pty/pty_darwin.go

@@ -0,0 +1,60 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = grantpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = unlockpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func ptsname(f *os.File) (string, error) {
+	n := make([]byte, _IOC_PARM_LEN(syscall.TIOCPTYGNAME))
+
+	err := ioctl(f.Fd(), syscall.TIOCPTYGNAME, uintptr(unsafe.Pointer(&n[0])))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range n {
+		if c == 0 {
+			return string(n[:i]), nil
+		}
+	}
+	return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
+}
+
+func grantpt(f *os.File) error {
+	return ioctl(f.Fd(), syscall.TIOCPTYGRANT, 0)
+}
+
+func unlockpt(f *os.File) error {
+	return ioctl(f.Fd(), syscall.TIOCPTYUNLK, 0)
+}

vendor/github.com/kr/pty/pty_dragonfly.go

@@ -0,0 +1,76 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+// same code as pty_darwin.go
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = grantpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = unlockpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func grantpt(f *os.File) error {
+	_, err := isptmaster(f.Fd())
+	return err
+}
+
+func unlockpt(f *os.File) error {
+	_, err := isptmaster(f.Fd())
+	return err
+}
+
+func isptmaster(fd uintptr) (bool, error) {
+	err := ioctl(fd, syscall.TIOCISPTMASTER, 0)
+	return err == nil, err
+}
+
+var (
+	emptyFiodgnameArg fiodgnameArg
+	ioctl_FIODNAME    = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
+)
+
+func ptsname(f *os.File) (string, error) {
+	name := make([]byte, _C_SPECNAMELEN)
+	fa := fiodgnameArg{Name: (*byte)(unsafe.Pointer(&name[0])), Len: _C_SPECNAMELEN, Pad_cgo_0: [4]byte{0, 0, 0, 0}}
+
+	err := ioctl(f.Fd(), ioctl_FIODNAME, uintptr(unsafe.Pointer(&fa)))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range name {
+		if c == 0 {
+			s := "/dev/" + string(name[:i])
+			return strings.Replace(s, "ptm", "pts", -1), nil
+		}
+	}
+	return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
+}

vendor/github.com/kr/pty/pty_freebsd.go

@@ -0,0 +1,73 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func posix_openpt(oflag int) (fd int, err error) {
+	r0, _, e1 := syscall.Syscall(syscall.SYS_POSIX_OPENPT, uintptr(oflag), 0, 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+func open() (pty, tty *os.File, err error) {
+	fd, err := posix_openpt(syscall.O_RDWR | syscall.O_CLOEXEC)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	p := os.NewFile(uintptr(fd), "/dev/pts")
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile("/dev/"+sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func isptmaster(fd uintptr) (bool, error) {
+	err := ioctl(fd, syscall.TIOCPTMASTER, 0)
+	return err == nil, err
+}
+
+var (
+	emptyFiodgnameArg fiodgnameArg
+	ioctl_FIODGNAME   = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
+)
+
+func ptsname(f *os.File) (string, error) {
+	master, err := isptmaster(f.Fd())
+	if err != nil {
+		return "", err
+	}
+	if !master {
+		return "", syscall.EINVAL
+	}
+
+	const n = _C_SPECNAMELEN + 1
+	var (
+		buf = make([]byte, n)
+		arg = fiodgnameArg{Len: n, Buf: (*byte)(unsafe.Pointer(&buf[0]))}
+	)
+	err = ioctl(f.Fd(), ioctl_FIODGNAME, uintptr(unsafe.Pointer(&arg)))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range buf {
+		if c == 0 {
+			return string(buf[:i]), nil
+		}
+	}
+	return "", errors.New("FIODGNAME string not NUL-terminated")
+}

vendor/github.com/kr/pty/pty_linux.go

@@ -0,0 +1,46 @@
+package pty
+
+import (
+	"os"
+	"strconv"
+	"syscall"
+	"unsafe"
+)
+
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = unlockpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR|syscall.O_NOCTTY, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func ptsname(f *os.File) (string, error) {
+	var n _C_uint
+	err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n)))
+	if err != nil {
+		return "", err
+	}
+	return "/dev/pts/" + strconv.Itoa(int(n)), nil
+}
+
+func unlockpt(f *os.File) error {
+	var u _C_int
+	// use TIOCSPTLCK with a zero valued arg to clear the slave pty lock
+	return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
+}

vendor/github.com/kr/pty/pty_unsupported.go

@@ -0,0 +1,11 @@
+// +build !linux,!darwin,!freebsd,!dragonfly
+
+package pty
+
+import (
+	"os"
+)
+
+func open() (pty, tty *os.File, err error) {
+	return nil, nil, ErrUnsupported
+}

vendor/github.com/kr/pty/run.go

@@ -0,0 +1,34 @@
+// +build !windows
+
+package pty
+
+import (
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+// Start assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
+// and c.Stderr, calls c.Start, and returns the File of the tty's
+// corresponding pty.
+func Start(c *exec.Cmd) (pty *os.File, err error) {
+	pty, tty, err := Open()
+	if err != nil {
+		return nil, err
+	}
+	defer tty.Close()
+	c.Stdout = tty
+	c.Stdin = tty
+	c.Stderr = tty
+	if c.SysProcAttr == nil {
+		c.SysProcAttr = &syscall.SysProcAttr{}
+	}
+	c.SysProcAttr.Setctty = true
+	c.SysProcAttr.Setsid = true
+	err = c.Start()
+	if err != nil {
+		pty.Close()
+		return nil, err
+	}
+	return pty, err
+}

vendor/github.com/kr/pty/types.go

@@ -0,0 +1,10 @@
+// +build ignore
+
+package pty
+
+import "C"
+
+type (
+	_C_int  C.int
+	_C_uint C.uint
+)

vendor/github.com/kr/pty/types_dragonfly.go

@@ -0,0 +1,17 @@
+// +build ignore
+
+package pty
+
+/*
+#define _KERNEL
+#include <sys/conf.h>
+#include <sys/param.h>
+#include <sys/filio.h>
+*/
+import "C"
+
+const (
+	_C_SPECNAMELEN = C.SPECNAMELEN /* max length of devicename */
+)
+
+type fiodgnameArg C.struct_fiodname_args

vendor/github.com/kr/pty/types_freebsd.go

@@ -0,0 +1,15 @@
+// +build ignore
+
+package pty
+
+/*
+#include <sys/param.h>
+#include <sys/filio.h>
+*/
+import "C"
+
+const (
+	_C_SPECNAMELEN = C.SPECNAMELEN /* max length of devicename */
+)
+
+type fiodgnameArg C.struct_fiodgname_arg

vendor/github.com/kr/pty/util.go

@@ -0,0 +1,37 @@
+// +build !windows
+
+package pty
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+// Getsize returns the number of rows (lines) and cols (positions
+// in each line) in terminal t.
+func Getsize(t *os.File) (rows, cols int, err error) {
+	var ws winsize
+	err = windowrect(&ws, t.Fd())
+	return int(ws.ws_row), int(ws.ws_col), err
+}
+
+type winsize struct {
+	ws_row    uint16
+	ws_col    uint16
+	ws_xpixel uint16
+	ws_ypixel uint16
+}
+
+func windowrect(ws *winsize, fd uintptr) error {
+	_, _, errno := syscall.Syscall(
+		syscall.SYS_IOCTL,
+		fd,
+		syscall.TIOCGWINSZ,
+		uintptr(unsafe.Pointer(ws)),
+	)
+	if errno != 0 {
+		return syscall.Errno(errno)
+	}
+	return nil
+}

vendor/github.com/kr/pty/ztypes_386.go

@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/kr/pty/ztypes_amd64.go

@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/kr/pty/ztypes_arm.go

@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/kr/pty/ztypes_arm64.go

@@ -0,0 +1,11 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+// +build arm64
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/kr/pty/ztypes_dragonfly_amd64.go

@@ -0,0 +1,14 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_dragonfly.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Name      *byte
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}

vendor/github.com/kr/pty/ztypes_freebsd_386.go

@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}

vendor/github.com/kr/pty/ztypes_freebsd_amd64.go

@@ -0,0 +1,14 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len       int32
+	Pad_cgo_0 [4]byte
+	Buf       *byte
+}

vendor/github.com/kr/pty/ztypes_freebsd_arm.go

@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}

vendor/github.com/kr/pty/ztypes_mipsx.go

@@ -0,0 +1,12 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+// +build linux
+// +build mips mipsle mips64 mips64le
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/kr/pty/ztypes_ppc64.go

@@ -0,0 +1,11 @@
+// +build ppc64
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/kr/pty/ztypes_ppc64le.go

@@ -0,0 +1,11 @@
+// +build ppc64le
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/kr/pty/ztypes_s390x.go

@@ -0,0 +1,11 @@
+// +build s390x
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)

vendor/github.com/mattn/go-colorable/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Yasuhiro Matsumoto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/mattn/go-colorable/README.md

@@ -0,0 +1,48 @@
+# go-colorable
+
+[![Godoc Reference](https://godoc.org/github.com/mattn/go-colorable?status.svg)](http://godoc.org/github.com/mattn/go-colorable)
+[![Build Status](https://travis-ci.org/mattn/go-colorable.svg?branch=master)](https://travis-ci.org/mattn/go-colorable)
+[![Coverage Status](https://coveralls.io/repos/github/mattn/go-colorable/badge.svg?branch=master)](https://coveralls.io/github/mattn/go-colorable?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/mattn/go-colorable)](https://goreportcard.com/report/mattn/go-colorable)
+
+Colorable writer for windows.
+
+For example, most of logger packages doesn't show colors on windows. (I know we can do it with ansicon. But I don't want.)
+This package is possible to handle escape sequence for ansi color on windows.
+
+## Too Bad!
+
+![](https://raw.githubusercontent.com/mattn/go-colorable/gh-pages/bad.png)
+
+
+## So Good!
+
+![](https://raw.githubusercontent.com/mattn/go-colorable/gh-pages/good.png)
+
+## Usage
+
+```go
+logrus.SetFormatter(&logrus.TextFormatter{ForceColors: true})
+logrus.SetOutput(colorable.NewColorableStdout())
+
+logrus.Info("succeeded")
+logrus.Warn("not correct")
+logrus.Error("something error")
+logrus.Fatal("panic")
+```
+
+You can compile above code on non-windows OSs.
+
+## Installation
+
+```
+$ go get github.com/mattn/go-colorable
+```
+
+# License
+
+MIT
+
+# Author
+
+Yasuhiro Matsumoto (a.k.a mattn)

vendor/github.com/mattn/go-colorable/colorable_appengine.go

@@ -0,0 +1,29 @@
+// +build appengine
+
+package colorable
+
+import (
+	"io"
+	"os"
+
+	_ "github.com/mattn/go-isatty"
+)
+
+// NewColorable return new instance of Writer which handle escape sequence.
+func NewColorable(file *os.File) io.Writer {
+	if file == nil {
+		panic("nil passed instead of *os.File to NewColorable()")
+	}
+
+	return file
+}
+
+// NewColorableStdout return new instance of Writer which handle escape sequence for stdout.
+func NewColorableStdout() io.Writer {
+	return os.Stdout
+}
+
+// NewColorableStderr return new instance of Writer which handle escape sequence for stderr.
+func NewColorableStderr() io.Writer {
+	return os.Stderr
+}

vendor/github.com/mattn/go-colorable/colorable_others.go

@@ -0,0 +1,30 @@
+// +build !windows
+// +build !appengine
+
+package colorable
+
+import (
+	"io"
+	"os"
+
+	_ "github.com/mattn/go-isatty"
+)
+
+// NewColorable return new instance of Writer which handle escape sequence.
+func NewColorable(file *os.File) io.Writer {
+	if file == nil {
+		panic("nil passed instead of *os.File to NewColorable()")
+	}
+
+	return file
+}
+
+// NewColorableStdout return new instance of Writer which handle escape sequence for stdout.
+func NewColorableStdout() io.Writer {
+	return os.Stdout
+}
+
+// NewColorableStderr return new instance of Writer which handle escape sequence for stderr.
+func NewColorableStderr() io.Writer {
+	return os.Stderr
+}

vendor/github.com/mattn/go-colorable/colorable_windows.go

@@ -0,0 +1,978 @@
+// +build windows
+// +build !appengine
+
+package colorable
+
+import (
+	"bytes"
+	"io"
+	"math"
+	"os"
+	"strconv"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"github.com/mattn/go-isatty"
+)
+
+const (
+	foregroundBlue      = 0x1
+	foregroundGreen     = 0x2
+	foregroundRed       = 0x4
+	foregroundIntensity = 0x8
+	foregroundMask      = (foregroundRed | foregroundBlue | foregroundGreen | foregroundIntensity)
+	backgroundBlue      = 0x10
+	backgroundGreen     = 0x20
+	backgroundRed       = 0x40
+	backgroundIntensity = 0x80
+	backgroundMask      = (backgroundRed | backgroundBlue | backgroundGreen | backgroundIntensity)
+)
+
+const (
+	genericRead  = 0x80000000
+	genericWrite = 0x40000000
+)
+
+const (
+	consoleTextmodeBuffer = 0x1
+)
+
+type wchar uint16
+type short int16
+type dword uint32
+type word uint16
+
+type coord struct {
+	x short
+	y short
+}
+
+type smallRect struct {
+	left   short
+	top    short
+	right  short
+	bottom short
+}
+
+type consoleScreenBufferInfo struct {
+	size              coord
+	cursorPosition    coord
+	attributes        word
+	window            smallRect
+	maximumWindowSize coord
+}
+
+type consoleCursorInfo struct {
+	size    dword
+	visible int32
+}
+
+var (
+	kernel32                       = syscall.NewLazyDLL("kernel32.dll")
+	procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
+	procSetConsoleTextAttribute    = kernel32.NewProc("SetConsoleTextAttribute")
+	procSetConsoleCursorPosition   = kernel32.NewProc("SetConsoleCursorPosition")
+	procFillConsoleOutputCharacter = kernel32.NewProc("FillConsoleOutputCharacterW")
+	procFillConsoleOutputAttribute = kernel32.NewProc("FillConsoleOutputAttribute")
+	procGetConsoleCursorInfo       = kernel32.NewProc("GetConsoleCursorInfo")
+	procSetConsoleCursorInfo       = kernel32.NewProc("SetConsoleCursorInfo")
+	procSetConsoleTitle            = kernel32.NewProc("SetConsoleTitleW")
+	procCreateConsoleScreenBuffer  = kernel32.NewProc("CreateConsoleScreenBuffer")
+)
+
+// Writer provide colorable Writer to the console
+type Writer struct {
+	out       io.Writer
+	handle    syscall.Handle
+	althandle syscall.Handle
+	oldattr   word
+	oldpos    coord
+	rest      bytes.Buffer
+}
+
+// NewColorable return new instance of Writer which handle escape sequence from File.
+func NewColorable(file *os.File) io.Writer {
+	if file == nil {
+		panic("nil passed instead of *os.File to NewColorable()")
+	}
+
+	if isatty.IsTerminal(file.Fd()) {
+		var csbi consoleScreenBufferInfo
+		handle := syscall.Handle(file.Fd())
+		procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+		return &Writer{out: file, handle: handle, oldattr: csbi.attributes, oldpos: coord{0, 0}}
+	}
+	return file
+}
+
+// NewColorableStdout return new instance of Writer which handle escape sequence for stdout.
+func NewColorableStdout() io.Writer {
+	return NewColorable(os.Stdout)
+}
+
+// NewColorableStderr return new instance of Writer which handle escape sequence for stderr.
+func NewColorableStderr() io.Writer {
+	return NewColorable(os.Stderr)
+}
+
+var color256 = map[int]int{
+	0:   0x000000,
+	1:   0x800000,
+	2:   0x008000,
+	3:   0x808000,
+	4:   0x000080,
+	5:   0x800080,
+	6:   0x008080,
+	7:   0xc0c0c0,
+	8:   0x808080,
+	9:   0xff0000,
+	10:  0x00ff00,
+	11:  0xffff00,
+	12:  0x0000ff,
+	13:  0xff00ff,
+	14:  0x00ffff,
+	15:  0xffffff,
+	16:  0x000000,
+	17:  0x00005f,
+	18:  0x000087,
+	19:  0x0000af,
+	20:  0x0000d7,
+	21:  0x0000ff,
+	22:  0x005f00,
+	23:  0x005f5f,
+	24:  0x005f87,
+	25:  0x005faf,
+	26:  0x005fd7,
+	27:  0x005fff,
+	28:  0x008700,
+	29:  0x00875f,
+	30:  0x008787,
+	31:  0x0087af,
+	32:  0x0087d7,
+	33:  0x0087ff,
+	34:  0x00af00,
+	35:  0x00af5f,
+	36:  0x00af87,
+	37:  0x00afaf,
+	38:  0x00afd7,
+	39:  0x00afff,
+	40:  0x00d700,
+	41:  0x00d75f,
+	42:  0x00d787,
+	43:  0x00d7af,
+	44:  0x00d7d7,
+	45:  0x00d7ff,
+	46:  0x00ff00,
+	47:  0x00ff5f,
+	48:  0x00ff87,
+	49:  0x00ffaf,
+	50:  0x00ffd7,
+	51:  0x00ffff,
+	52:  0x5f0000,
+	53:  0x5f005f,
+	54:  0x5f0087,
+	55:  0x5f00af,
+	56:  0x5f00d7,
+	57:  0x5f00ff,
+	58:  0x5f5f00,
+	59:  0x5f5f5f,
+	60:  0x5f5f87,
+	61:  0x5f5faf,
+	62:  0x5f5fd7,
+	63:  0x5f5fff,
+	64:  0x5f8700,
+	65:  0x5f875f,
+	66:  0x5f8787,
+	67:  0x5f87af,
+	68:  0x5f87d7,
+	69:  0x5f87ff,
+	70:  0x5faf00,
+	71:  0x5faf5f,
+	72:  0x5faf87,
+	73:  0x5fafaf,
+	74:  0x5fafd7,
+	75:  0x5fafff,
+	76:  0x5fd700,
+	77:  0x5fd75f,
+	78:  0x5fd787,
+	79:  0x5fd7af,
+	80:  0x5fd7d7,
+	81:  0x5fd7ff,
+	82:  0x5fff00,
+	83:  0x5fff5f,
+	84:  0x5fff87,
+	85:  0x5fffaf,
+	86:  0x5fffd7,
+	87:  0x5fffff,
+	88:  0x870000,
+	89:  0x87005f,
+	90:  0x870087,
+	91:  0x8700af,
+	92:  0x8700d7,
+	93:  0x8700ff,
+	94:  0x875f00,
+	95:  0x875f5f,
+	96:  0x875f87,
+	97:  0x875faf,
+	98:  0x875fd7,
+	99:  0x875fff,
+	100: 0x878700,
+	101: 0x87875f,
+	102: 0x878787,
+	103: 0x8787af,
+	104: 0x8787d7,
+	105: 0x8787ff,
+	106: 0x87af00,
+	107: 0x87af5f,
+	108: 0x87af87,
+	109: 0x87afaf,
+	110: 0x87afd7,
+	111: 0x87afff,
+	112: 0x87d700,
+	113: 0x87d75f,
+	114: 0x87d787,
+	115: 0x87d7af,
+	116: 0x87d7d7,
+	117: 0x87d7ff,
+	118: 0x87ff00,
+	119: 0x87ff5f,
+	120: 0x87ff87,
+	121: 0x87ffaf,
+	122: 0x87ffd7,
+	123: 0x87ffff,
+	124: 0xaf0000,
+	125: 0xaf005f,
+	126: 0xaf0087,
+	127: 0xaf00af,
+	128: 0xaf00d7,
+	129: 0xaf00ff,
+	130: 0xaf5f00,
+	131: 0xaf5f5f,
+	132: 0xaf5f87,
+	133: 0xaf5faf,
+	134: 0xaf5fd7,
+	135: 0xaf5fff,
+	136: 0xaf8700,
+	137: 0xaf875f,
+	138: 0xaf8787,
+	139: 0xaf87af,
+	140: 0xaf87d7,
+	141: 0xaf87ff,
+	142: 0xafaf00,
+	143: 0xafaf5f,
+	144: 0xafaf87,
+	145: 0xafafaf,
+	146: 0xafafd7,
+	147: 0xafafff,
+	148: 0xafd700,
+	149: 0xafd75f,
+	150: 0xafd787,
+	151: 0xafd7af,
+	152: 0xafd7d7,
+	153: 0xafd7ff,
+	154: 0xafff00,
+	155: 0xafff5f,
+	156: 0xafff87,
+	157: 0xafffaf,
+	158: 0xafffd7,
+	159: 0xafffff,
+	160: 0xd70000,
+	161: 0xd7005f,
+	162: 0xd70087,
+	163: 0xd700af,
+	164: 0xd700d7,
+	165: 0xd700ff,
+	166: 0xd75f00,
+	167: 0xd75f5f,
+	168: 0xd75f87,
+	169: 0xd75faf,
+	170: 0xd75fd7,
+	171: 0xd75fff,
+	172: 0xd78700,
+	173: 0xd7875f,
+	174: 0xd78787,
+	175: 0xd787af,
+	176: 0xd787d7,
+	177: 0xd787ff,
+	178: 0xd7af00,
+	179: 0xd7af5f,
+	180: 0xd7af87,
+	181: 0xd7afaf,
+	182: 0xd7afd7,
+	183: 0xd7afff,
+	184: 0xd7d700,
+	185: 0xd7d75f,
+	186: 0xd7d787,
+	187: 0xd7d7af,
+	188: 0xd7d7d7,
+	189: 0xd7d7ff,
+	190: 0xd7ff00,
+	191: 0xd7ff5f,
+	192: 0xd7ff87,
+	193: 0xd7ffaf,
+	194: 0xd7ffd7,
+	195: 0xd7ffff,
+	196: 0xff0000,
+	197: 0xff005f,
+	198: 0xff0087,
+	199: 0xff00af,
+	200: 0xff00d7,
+	201: 0xff00ff,
+	202: 0xff5f00,
+	203: 0xff5f5f,
+	204: 0xff5f87,
+	205: 0xff5faf,
+	206: 0xff5fd7,
+	207: 0xff5fff,
+	208: 0xff8700,
+	209: 0xff875f,
+	210: 0xff8787,
+	211: 0xff87af,
+	212: 0xff87d7,
+	213: 0xff87ff,
+	214: 0xffaf00,
+	215: 0xffaf5f,
+	216: 0xffaf87,
+	217: 0xffafaf,
+	218: 0xffafd7,
+	219: 0xffafff,
+	220: 0xffd700,
+	221: 0xffd75f,
+	222: 0xffd787,
+	223: 0xffd7af,
+	224: 0xffd7d7,
+	225: 0xffd7ff,
+	226: 0xffff00,
+	227: 0xffff5f,
+	228: 0xffff87,
+	229: 0xffffaf,
+	230: 0xffffd7,
+	231: 0xffffff,
+	232: 0x080808,
+	233: 0x121212,
+	234: 0x1c1c1c,
+	235: 0x262626,
+	236: 0x303030,
+	237: 0x3a3a3a,
+	238: 0x444444,
+	239: 0x4e4e4e,
+	240: 0x585858,
+	241: 0x626262,
+	242: 0x6c6c6c,
+	243: 0x767676,
+	244: 0x808080,
+	245: 0x8a8a8a,
+	246: 0x949494,
+	247: 0x9e9e9e,
+	248: 0xa8a8a8,
+	249: 0xb2b2b2,
+	250: 0xbcbcbc,
+	251: 0xc6c6c6,
+	252: 0xd0d0d0,
+	253: 0xdadada,
+	254: 0xe4e4e4,
+	255: 0xeeeeee,
+}
+
+// `\033]0;TITLESTR\007`
+func doTitleSequence(er *bytes.Reader) error {
+	var c byte
+	var err error
+
+	c, err = er.ReadByte()
+	if err != nil {
+		return err
+	}
+	if c != '0' && c != '2' {
+		return nil
+	}
+	c, err = er.ReadByte()
+	if err != nil {
+		return err
+	}
+	if c != ';' {
+		return nil
+	}
+	title := make([]byte, 0, 80)
+	for {
+		c, err = er.ReadByte()
+		if err != nil {
+			return err
+		}
+		if c == 0x07 || c == '\n' {
+			break
+		}
+		title = append(title, c)
+	}
+	if len(title) > 0 {
+		title8, err := syscall.UTF16PtrFromString(string(title))
+		if err == nil {
+			procSetConsoleTitle.Call(uintptr(unsafe.Pointer(title8)))
+		}
+	}
+	return nil
+}
+
+// Write write data on console
+func (w *Writer) Write(data []byte) (n int, err error) {
+	var csbi consoleScreenBufferInfo
+	procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi)))
+
+	handle := w.handle
+
+	var er *bytes.Reader
+	if w.rest.Len() > 0 {
+		var rest bytes.Buffer
+		w.rest.WriteTo(&rest)
+		w.rest.Reset()
+		rest.Write(data)
+		er = bytes.NewReader(rest.Bytes())
+	} else {
+		er = bytes.NewReader(data)
+	}
+	var bw [1]byte
+loop:
+	for {
+		c1, err := er.ReadByte()
+		if err != nil {
+			break loop
+		}
+		if c1 != 0x1b {
+			bw[0] = c1
+			w.out.Write(bw[:])
+			continue
+		}
+		c2, err := er.ReadByte()
+		if err != nil {
+			break loop
+		}
+
+		switch c2 {
+		case ']':
+			w.rest.WriteByte(c1)
+			w.rest.WriteByte(c2)
+			er.WriteTo(&w.rest)
+			if bytes.IndexByte(w.rest.Bytes(), 0x07) == -1 {
+				break loop
+			}
+			er = bytes.NewReader(w.rest.Bytes()[2:])
+			err := doTitleSequence(er)
+			if err != nil {
+				break loop
+			}
+			w.rest.Reset()
+			continue
+		// https://github.com/mattn/go-colorable/issues/27
+		case '7':
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			w.oldpos = csbi.cursorPosition
+			continue
+		case '8':
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&w.oldpos)))
+			continue
+		case 0x5b:
+			// execute part after switch
+		default:
+			continue
+		}
+
+		w.rest.WriteByte(c1)
+		w.rest.WriteByte(c2)
+		er.WriteTo(&w.rest)
+
+		var buf bytes.Buffer
+		var m byte
+		for i, c := range w.rest.Bytes()[2:] {
+			if ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '@' {
+				m = c
+				er = bytes.NewReader(w.rest.Bytes()[2+i+1:])
+				w.rest.Reset()
+				break
+			}
+			buf.Write([]byte(string(c)))
+		}
+		if m == 0 {
+			break loop
+		}
+
+		switch m {
+		case 'A':
+			n, err = strconv.Atoi(buf.String())
+			if err != nil {
+				continue
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			csbi.cursorPosition.y -= short(n)
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'B':
+			n, err = strconv.Atoi(buf.String())
+			if err != nil {
+				continue
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			csbi.cursorPosition.y += short(n)
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'C':
+			n, err = strconv.Atoi(buf.String())
+			if err != nil {
+				continue
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			csbi.cursorPosition.x += short(n)
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'D':
+			n, err = strconv.Atoi(buf.String())
+			if err != nil {
+				continue
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			csbi.cursorPosition.x -= short(n)
+			if csbi.cursorPosition.x < 0 {
+				csbi.cursorPosition.x = 0
+			}
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'E':
+			n, err = strconv.Atoi(buf.String())
+			if err != nil {
+				continue
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			csbi.cursorPosition.x = 0
+			csbi.cursorPosition.y += short(n)
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'F':
+			n, err = strconv.Atoi(buf.String())
+			if err != nil {
+				continue
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			csbi.cursorPosition.x = 0
+			csbi.cursorPosition.y -= short(n)
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'G':
+			n, err = strconv.Atoi(buf.String())
+			if err != nil {
+				continue
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			csbi.cursorPosition.x = short(n - 1)
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'H', 'f':
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			if buf.Len() > 0 {
+				token := strings.Split(buf.String(), ";")
+				switch len(token) {
+				case 1:
+					n1, err := strconv.Atoi(token[0])
+					if err != nil {
+						continue
+					}
+					csbi.cursorPosition.y = short(n1 - 1)
+				case 2:
+					n1, err := strconv.Atoi(token[0])
+					if err != nil {
+						continue
+					}
+					n2, err := strconv.Atoi(token[1])
+					if err != nil {
+						continue
+					}
+					csbi.cursorPosition.x = short(n2 - 1)
+					csbi.cursorPosition.y = short(n1 - 1)
+				}
+			} else {
+				csbi.cursorPosition.y = 0
+			}
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition)))
+		case 'J':
+			n := 0
+			if buf.Len() > 0 {
+				n, err = strconv.Atoi(buf.String())
+				if err != nil {
+					continue
+				}
+			}
+			var count, written dword
+			var cursor coord
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			switch n {
+			case 0:
+				cursor = coord{x: csbi.cursorPosition.x, y: csbi.cursorPosition.y}
+				count = dword(csbi.size.x - csbi.cursorPosition.x + (csbi.size.y-csbi.cursorPosition.y)*csbi.size.x)
+			case 1:
+				cursor = coord{x: csbi.window.left, y: csbi.window.top}
+				count = dword(csbi.size.x - csbi.cursorPosition.x + (csbi.window.top-csbi.cursorPosition.y)*csbi.size.x)
+			case 2:
+				cursor = coord{x: csbi.window.left, y: csbi.window.top}
+				count = dword(csbi.size.x - csbi.cursorPosition.x + (csbi.size.y-csbi.cursorPosition.y)*csbi.size.x)
+			}
+			procFillConsoleOutputCharacter.Call(uintptr(handle), uintptr(' '), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written)))
+			procFillConsoleOutputAttribute.Call(uintptr(handle), uintptr(csbi.attributes), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written)))
+		case 'K':
+			n := 0
+			if buf.Len() > 0 {
+				n, err = strconv.Atoi(buf.String())
+				if err != nil {
+					continue
+				}
+			}
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			var cursor coord
+			var count, written dword
+			switch n {
+			case 0:
+				cursor = coord{x: csbi.cursorPosition.x, y: csbi.cursorPosition.y}
+				count = dword(csbi.size.x - csbi.cursorPosition.x)
+			case 1:
+				cursor = coord{x: csbi.window.left, y: csbi.window.top + csbi.cursorPosition.y}
+				count = dword(csbi.size.x - csbi.cursorPosition.x)
+			case 2:
+				cursor = coord{x: csbi.window.left, y: csbi.window.top + csbi.cursorPosition.y}
+				count = dword(csbi.size.x)
+			}
+			procFillConsoleOutputCharacter.Call(uintptr(handle), uintptr(' '), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written)))
+			procFillConsoleOutputAttribute.Call(uintptr(handle), uintptr(csbi.attributes), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written)))
+		case 'm':
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			attr := csbi.attributes
+			cs := buf.String()
+			if cs == "" {
+				procSetConsoleTextAttribute.Call(uintptr(handle), uintptr(w.oldattr))
+				continue
+			}
+			token := strings.Split(cs, ";")
+			for i := 0; i < len(token); i++ {
+				ns := token[i]
+				if n, err = strconv.Atoi(ns); err == nil {
+					switch {
+					case n == 0 || n == 100:
+						attr = w.oldattr
+					case 1 <= n && n <= 5:
+						attr |= foregroundIntensity
+					case n == 7:
+						attr = ((attr & foregroundMask) << 4) | ((attr & backgroundMask) >> 4)
+					case n == 22 || n == 25:
+						attr |= foregroundIntensity
+					case n == 27:
+						attr = ((attr & foregroundMask) << 4) | ((attr & backgroundMask) >> 4)
+					case 30 <= n && n <= 37:
+						attr &= backgroundMask
+						if (n-30)&1 != 0 {
+							attr |= foregroundRed
+						}
+						if (n-30)&2 != 0 {
+							attr |= foregroundGreen
+						}
+						if (n-30)&4 != 0 {
+							attr |= foregroundBlue
+						}
+					case n == 38: // set foreground color.
+						if i < len(token)-2 && (token[i+1] == "5" || token[i+1] == "05") {
+							if n256, err := strconv.Atoi(token[i+2]); err == nil {
+								if n256foreAttr == nil {
+									n256setup()
+								}
+								attr &= backgroundMask
+								attr |= n256foreAttr[n256]
+								i += 2
+							}
+						} else if len(token) == 5 && token[i+1] == "2" {
+							var r, g, b int
+							r, _ = strconv.Atoi(token[i+2])
+							g, _ = strconv.Atoi(token[i+3])
+							b, _ = strconv.Atoi(token[i+4])
+							i += 4
+							if r > 127 {
+								attr |= foregroundRed
+							}
+							if g > 127 {
+								attr |= foregroundGreen
+							}
+							if b > 127 {
+								attr |= foregroundBlue
+							}
+						} else {
+							attr = attr & (w.oldattr & backgroundMask)
+						}
+					case n == 39: // reset foreground color.
+						attr &= backgroundMask
+						attr |= w.oldattr & foregroundMask
+					case 40 <= n && n <= 47:
+						attr &= foregroundMask
+						if (n-40)&1 != 0 {
+							attr |= backgroundRed
+						}
+						if (n-40)&2 != 0 {
+							attr |= backgroundGreen
+						}
+						if (n-40)&4 != 0 {
+							attr |= backgroundBlue
+						}
+					case n == 48: // set background color.
+						if i < len(token)-2 && token[i+1] == "5" {
+							if n256, err := strconv.Atoi(token[i+2]); err == nil {
+								if n256backAttr == nil {
+									n256setup()
+								}
+								attr &= foregroundMask
+								attr |= n256backAttr[n256]
+								i += 2
+							}
+						} else if len(token) == 5 && token[i+1] == "2" {
+							var r, g, b int
+							r, _ = strconv.Atoi(token[i+2])
+							g, _ = strconv.Atoi(token[i+3])
+							b, _ = strconv.Atoi(token[i+4])
+							i += 4
+							if r > 127 {
+								attr |= backgroundRed
+							}
+							if g > 127 {
+								attr |= backgroundGreen
+							}
+							if b > 127 {
+								attr |= backgroundBlue
+							}
+						} else {
+							attr = attr & (w.oldattr & foregroundMask)
+						}
+					case n == 49: // reset foreground color.
+						attr &= foregroundMask
+						attr |= w.oldattr & backgroundMask
+					case 90 <= n && n <= 97:
+						attr = (attr & backgroundMask)
+						attr |= foregroundIntensity
+						if (n-90)&1 != 0 {
+							attr |= foregroundRed
+						}
+						if (n-90)&2 != 0 {
+							attr |= foregroundGreen
+						}
+						if (n-90)&4 != 0 {
+							attr |= foregroundBlue
+						}
+					case 100 <= n && n <= 107:
+						attr = (attr & foregroundMask)
+						attr |= backgroundIntensity
+						if (n-100)&1 != 0 {
+							attr |= backgroundRed
+						}
+						if (n-100)&2 != 0 {
+							attr |= backgroundGreen
+						}
+						if (n-100)&4 != 0 {
+							attr |= backgroundBlue
+						}
+					}
+					procSetConsoleTextAttribute.Call(uintptr(handle), uintptr(attr))
+				}
+			}
+		case 'h':
+			var ci consoleCursorInfo
+			cs := buf.String()
+			if cs == "5>" {
+				procGetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+				ci.visible = 0
+				procSetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+			} else if cs == "?25" {
+				procGetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+				ci.visible = 1
+				procSetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+			} else if cs == "?1049" {
+				if w.althandle == 0 {
+					h, _, _ := procCreateConsoleScreenBuffer.Call(uintptr(genericRead|genericWrite), 0, 0, uintptr(consoleTextmodeBuffer), 0, 0)
+					w.althandle = syscall.Handle(h)
+					if w.althandle != 0 {
+						handle = w.althandle
+					}
+				}
+			}
+		case 'l':
+			var ci consoleCursorInfo
+			cs := buf.String()
+			if cs == "5>" {
+				procGetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+				ci.visible = 1
+				procSetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+			} else if cs == "?25" {
+				procGetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+				ci.visible = 0
+				procSetConsoleCursorInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&ci)))
+			} else if cs == "?1049" {
+				if w.althandle != 0 {
+					syscall.CloseHandle(w.althandle)
+					w.althandle = 0
+					handle = w.handle
+				}
+			}
+		case 's':
+			procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi)))
+			w.oldpos = csbi.cursorPosition
+		case 'u':
+			procSetConsoleCursorPosition.Call(uintptr(handle), *(*uintptr)(unsafe.Pointer(&w.oldpos)))
+		}
+	}
+
+	return len(data), nil
+}
+
+type consoleColor struct {
+	rgb       int
+	red       bool
+	green     bool
+	blue      bool
+	intensity bool
+}
+
+func (c consoleColor) foregroundAttr() (attr word) {
+	if c.red {
+		attr |= foregroundRed
+	}
+	if c.green {
+		attr |= foregroundGreen
+	}
+	if c.blue {
+		attr |= foregroundBlue
+	}
+	if c.intensity {
+		attr |= foregroundIntensity
+	}
+	return
+}
+
+func (c consoleColor) backgroundAttr() (attr word) {
+	if c.red {
+		attr |= backgroundRed
+	}
+	if c.green {
+		attr |= backgroundGreen
+	}
+	if c.blue {
+		attr |= backgroundBlue
+	}
+	if c.intensity {
+		attr |= backgroundIntensity
+	}
+	return
+}
+
+var color16 = []consoleColor{
+	{0x000000, false, false, false, false},
+	{0x000080, false, false, true, false},
+	{0x008000, false, true, false, false},
+	{0x008080, false, true, true, false},
+	{0x800000, true, false, false, false},
+	{0x800080, true, false, true, false},
+	{0x808000, true, true, false, false},
+	{0xc0c0c0, true, true, true, false},
+	{0x808080, false, false, false, true},
+	{0x0000ff, false, false, true, true},
+	{0x00ff00, false, true, false, true},
+	{0x00ffff, false, true, true, true},
+	{0xff0000, true, false, false, true},
+	{0xff00ff, true, false, true, true},
+	{0xffff00, true, true, false, true},
+	{0xffffff, true, true, true, true},
+}
+
+type hsv struct {
+	h, s, v float32
+}
+
+func (a hsv) dist(b hsv) float32 {
+	dh := a.h - b.h
+	switch {
+	case dh > 0.5:
+		dh = 1 - dh
+	case dh < -0.5:
+		dh = -1 - dh
+	}
+	ds := a.s - b.s
+	dv := a.v - b.v
+	return float32(math.Sqrt(float64(dh*dh + ds*ds + dv*dv)))
+}
+
+func toHSV(rgb int) hsv {
+	r, g, b := float32((rgb&0xFF0000)>>16)/256.0,
+		float32((rgb&0x00FF00)>>8)/256.0,
+		float32(rgb&0x0000FF)/256.0
+	min, max := minmax3f(r, g, b)
+	h := max - min
+	if h > 0 {
+		if max == r {
+			h = (g - b) / h
+			if h < 0 {
+				h += 6
+			}
+		} else if max == g {
+			h = 2 + (b-r)/h
+		} else {
+			h = 4 + (r-g)/h
+		}
+	}
+	h /= 6.0
+	s := max - min
+	if max != 0 {
+		s /= max
+	}
+	v := max
+	return hsv{h: h, s: s, v: v}
+}
+
+type hsvTable []hsv
+
+func toHSVTable(rgbTable []consoleColor) hsvTable {
+	t := make(hsvTable, len(rgbTable))
+	for i, c := range rgbTable {
+		t[i] = toHSV(c.rgb)
+	}
+	return t
+}
+
+func (t hsvTable) find(rgb int) consoleColor {
+	hsv := toHSV(rgb)
+	n := 7
+	l := float32(5.0)
+	for i, p := range t {
+		d := hsv.dist(p)
+		if d < l {
+			l, n = d, i
+		}
+	}
+	return color16[n]
+}
+
+func minmax3f(a, b, c float32) (min, max float32) {
+	if a < b {
+		if b < c {
+			return a, c
+		} else if a < c {
+			return a, b
+		} else {
+			return c, b
+		}
+	} else {
+		if a < c {
+			return b, c
+		} else if b < c {
+			return b, a
+		} else {
+			return c, a
+		}
+	}
+}
+
+var n256foreAttr []word
+var n256backAttr []word
+
+func n256setup() {
+	n256foreAttr = make([]word, 256)
+	n256backAttr = make([]word, 256)
+	t := toHSVTable(color16)
+	for i, rgb := range color256 {
+		c := t.find(rgb)
+		n256foreAttr[i] = c.foregroundAttr()
+		n256backAttr[i] = c.backgroundAttr()
+	}
+}

vendor/github.com/mattn/go-colorable/noncolorable.go

@@ -0,0 +1,55 @@
+package colorable
+
+import (
+	"bytes"
+	"io"
+)
+
+// NonColorable hold writer but remove escape sequence.
+type NonColorable struct {
+	out io.Writer
+}
+
+// NewNonColorable return new instance of Writer which remove escape sequence from Writer.
+func NewNonColorable(w io.Writer) io.Writer {
+	return &NonColorable{out: w}
+}
+
+// Write write data on console
+func (w *NonColorable) Write(data []byte) (n int, err error) {
+	er := bytes.NewReader(data)
+	var bw [1]byte
+loop:
+	for {
+		c1, err := er.ReadByte()
+		if err != nil {
+			break loop
+		}
+		if c1 != 0x1b {
+			bw[0] = c1
+			w.out.Write(bw[:])
+			continue
+		}
+		c2, err := er.ReadByte()
+		if err != nil {
+			break loop
+		}
+		if c2 != 0x5b {
+			continue
+		}
+
+		var buf bytes.Buffer
+		for {
+			c, err := er.ReadByte()
+			if err != nil {
+				break loop
+			}
+			if ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '@' {
+				break
+			}
+			buf.Write([]byte(string(c)))
+		}
+	}
+
+	return len(data), nil
+}