Merge pull request #214 from codeandroid/add-cryptopp

Add Crypto++ port

ports/cryptopp/CONTROL

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+Source: cryptopp
+Version: 5.6.5
+Description: Crypto++ is a free C++ class library of cryptographic schemes.

ports/cryptopp/portfile.cmake

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+include(${CMAKE_TRIPLET_FILE})
+include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/cryptopp-CRYPTOPP_5_6_5)
+vcpkg_download_distfile(ARCHIVE
+    URLS "https://github.com/weidai11/cryptopp/archive/CRYPTOPP_5_6_5.zip"
+    FILENAME "CRYPTOPP_5_6_5.zip"
+    SHA512 abca8089e2d587f59c503d2d6412b3128d061784349c735f3ee46be1cb9e3d0d0fed9a9173765fa033eb2dc744e03810de45b8cc2f8ca1672a36e4123648ea44
+)
+vcpkg_extract_source_archive(${ARCHIVE})
+
+# Dynamic linking should be avoided for Crypto++ to reduce the attack surface,
+# so generate a static lib for both dynamic and static vcpkg targets.
+# See also:
+#   https://www.cryptopp.com/wiki/Visual_Studio#Dynamic_Runtime_Linking
+#   https://www.cryptopp.com/wiki/Visual_Studio#The_DLL
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    OPTIONS
+        -DBUILD_SHARED=OFF
+        -DBUILD_STATIC=ON
+        -DBUILD_TESTING=OFF
+        -DBUILD_DOCUMENTATION=OFF
+)
+
+vcpkg_install_cmake()
+
+# There is no way to suppress installation of the headers and resource files in debug build.
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/share)
+
+# Remove executables
+file(REMOVE ${CURRENT_PACKAGES_DIR}/bin/cryptest.exe)
+file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/bin/cryptest.exe)
+
+# Remove other files not required in package
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/lib/cmake) 
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/lib/cmake) 
+
+# Handle copyright
+file(COPY ${SOURCE_PATH}/License.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/cryptopp)
+file(RENAME ${CURRENT_PACKAGES_DIR}/share/cryptopp/License.txt ${CURRENT_PACKAGES_DIR}/share/cryptopp/copyright)