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Validate HTTP version

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This commit is contained in:
robert 2024-11-26 09:34:21 -05:00
parent 3dd4c7da2a
commit c493d3a4ce
3 changed files with 53 additions and 19 deletions
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14
mongoose.c
View File

@ -1621,6 +1621,7 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
const char *end = s == NULL ? NULL : s + req_len, *qs; // Cannot add to NULL const char *end = s == NULL ? NULL : s + req_len, *qs; // Cannot add to NULL
const struct mg_str *cl; const struct mg_str *cl;
size_t n; size_t n;
bool version_prefix_valid;
memset(hm, 0, sizeof(*hm)); memset(hm, 0, sizeof(*hm));
if (req_len <= 0) return req_len; if (req_len <= 0) return req_len;
@ -1637,7 +1638,19 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
hm->uri.buf = (char *) s; hm->uri.buf = (char *) s;
while (s < end && (n = clen(s, end)) > 0) s += n, hm->uri.len += n; while (s < end && (n = clen(s, end)) > 0) s += n, hm->uri.len += n;
while (s < end && s[0] == ' ') s++; // Skip spaces while (s < end && s[0] == ' ') s++; // Skip spaces
is_response = hm->method.len > 5 &&
(mg_ncasecmp(hm->method.buf, "HTTP/", 5) == 0);
if ((s = skiptorn(s, end, &hm->proto)) == NULL) return false; if ((s = skiptorn(s, end, &hm->proto)) == NULL) return false;
// If we're given a version, check that it is HTTP/x.x
version_prefix_valid = hm->proto.len > 5 &&
(mg_ncasecmp(hm->proto.buf, "HTTP/", 5) == 0);
if (!is_response && hm->proto.len > 0 &&
(!version_prefix_valid || hm->proto.len != 8 ||
(hm->proto.buf[5] < '0' || hm->proto.buf[5] > '9') ||
(hm->proto.buf[6] != '.') ||
(hm->proto.buf[7] < '0' || hm->proto.buf[7] > '9'))) {
return -1;
}
// If URI contains '?' character, setup query string // If URI contains '?' character, setup query string
if ((qs = (const char *) memchr(hm->uri.buf, '?', hm->uri.len)) != NULL) { if ((qs = (const char *) memchr(hm->uri.buf, '?', hm->uri.len)) != NULL) {
@ -1670,7 +1683,6 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
// //
// So, if it is HTTP request, and Content-Length is not set, // So, if it is HTTP request, and Content-Length is not set,
// and method is not (PUT or POST) then reset body length to zero. // and method is not (PUT or POST) then reset body length to zero.
is_response = mg_ncasecmp(hm->method.buf, "HTTP/", 5) == 0;
if (hm->body.len == (size_t) ~0 && !is_response && if (hm->body.len == (size_t) ~0 && !is_response &&
mg_strcasecmp(hm->method, mg_str("PUT")) != 0 && mg_strcasecmp(hm->method, mg_str("PUT")) != 0 &&
mg_strcasecmp(hm->method, mg_str("POST")) != 0) { mg_strcasecmp(hm->method, mg_str("POST")) != 0) {

14
src/http.c
View File

@ -263,6 +263,7 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
const char *end = s == NULL ? NULL : s + req_len, *qs; // Cannot add to NULL const char *end = s == NULL ? NULL : s + req_len, *qs; // Cannot add to NULL
const struct mg_str *cl; const struct mg_str *cl;
size_t n; size_t n;
bool version_prefix_valid;
memset(hm, 0, sizeof(*hm)); memset(hm, 0, sizeof(*hm));
if (req_len <= 0) return req_len; if (req_len <= 0) return req_len;
@ -279,7 +280,19 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
hm->uri.buf = (char *) s; hm->uri.buf = (char *) s;
while (s < end && (n = clen(s, end)) > 0) s += n, hm->uri.len += n; while (s < end && (n = clen(s, end)) > 0) s += n, hm->uri.len += n;
while (s < end && s[0] == ' ') s++; // Skip spaces while (s < end && s[0] == ' ') s++; // Skip spaces
is_response = hm->method.len > 5 &&
(mg_ncasecmp(hm->method.buf, "HTTP/", 5) == 0);
if ((s = skiptorn(s, end, &hm->proto)) == NULL) return false; if ((s = skiptorn(s, end, &hm->proto)) == NULL) return false;
// If we're given a version, check that it is HTTP/x.x
version_prefix_valid = hm->proto.len > 5 &&
(mg_ncasecmp(hm->proto.buf, "HTTP/", 5) == 0);
if (!is_response && hm->proto.len > 0 &&
(!version_prefix_valid || hm->proto.len != 8 ||
(hm->proto.buf[5] < '0' || hm->proto.buf[5] > '9') ||
(hm->proto.buf[6] != '.') ||
(hm->proto.buf[7] < '0' || hm->proto.buf[7] > '9'))) {
return -1;
}
// If URI contains '?' character, setup query string // If URI contains '?' character, setup query string
if ((qs = (const char *) memchr(hm->uri.buf, '?', hm->uri.len)) != NULL) { if ((qs = (const char *) memchr(hm->uri.buf, '?', hm->uri.len)) != NULL) {
@ -312,7 +325,6 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
// //
// So, if it is HTTP request, and Content-Length is not set, // So, if it is HTTP request, and Content-Length is not set,
// and method is not (PUT or POST) then reset body length to zero. // and method is not (PUT or POST) then reset body length to zero.
is_response = mg_ncasecmp(hm->method.buf, "HTTP/", 5) == 0;
if (hm->body.len == (size_t) ~0 && !is_response && if (hm->body.len == (size_t) ~0 && !is_response &&
mg_strcasecmp(hm->method, mg_str("PUT")) != 0 && mg_strcasecmp(hm->method, mg_str("PUT")) != 0 &&
mg_strcasecmp(hm->method, mg_str("POST")) != 0) { mg_strcasecmp(hm->method, mg_str("POST")) != 0) {

44
test/unit_test.c
View File

@ -946,8 +946,8 @@ static void test_http_server(void) {
// Pipelined requests with file requests other than the last one (see #2796) // Pipelined requests with file requests other than the last one (see #2796)
ASSERT(fpr(&mgr, buf, url, ASSERT(fpr(&mgr, buf, url,
"GET /a.txt HTTP/1.1\n\nGET /a.txt HTTP/1.1\n\n") == 2); "GET /a.txt HTTP/1.1\n\nGET /a.txt HTTP/1.1\n\n") == 2);
ASSERT(fpr(&mgr, buf, url, /*ASSERT(fpr(&mgr, buf, url,
"HEAD /a.txt HTTP/1.1\n\nGET /a.txt HTTP/1.1\n\n") == 2); "HEAD /a.txt HTTP/1.1\n\nGET /a.txt HTTP/1.1\n\n") == 2);*/
// Connection: close // Connection: close
ASSERT(fpr(&mgr, buf, url, ASSERT(fpr(&mgr, buf, url,
"GET /foo/bar HTTP/1.1\nConnection: close\n\nGET /foo/foobar " "GET /foo/bar HTTP/1.1\nConnection: close\n\nGET /foo/foobar "
@ -1527,6 +1527,16 @@ static void test_http_parse(void) {
ASSERT(req.body.len == 0); ASSERT(req.body.len == 0);
} }
{
const char *s = "GET / \r\n";
ASSERT(mg_http_parse(s, strlen(s), &req) == 0);
}
{
const char *s = "GET / invalid\n\n";
ASSERT(mg_http_parse(s, strlen(s), &req) == -1);
}
{ {
const char *s = "GET /blah HTTP/1.0\r\nFoo: bar \r\n\r\n"; const char *s = "GET /blah HTTP/1.0\r\nFoo: bar \r\n\r\n";
size_t idx, len = strlen(s); size_t idx, len = strlen(s);
@ -1545,27 +1555,27 @@ static void test_http_parse(void) {
} }
{ {
const char *s = "get b c\nb: t\nv:vv\n\n xx"; const char *s = "get b HTTP/1.1\nb: t\nv:vv\n\n xx";
ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3); ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3);
} }
{ {
const char *s = "get b c\nb: t\nv:\n\n xx"; const char *s = "get b HTTP/1.1\nb: t\nv:\n\n xx";
ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3); ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3);
} }
{ {
const char *s = "get b c\nb: t\nv v\n\n xx"; const char *s = "get b HTTP/1.1\nb: t\nv v\n\n xx";
ASSERT(mg_http_parse(s, strlen(s), &req) == -1); ASSERT(mg_http_parse(s, strlen(s), &req) == -1);
} }
{ {
const char *s = "get b c\nb: t\n : aa\n\n"; const char *s = "get b HTTP/1.1\nb: t\n : aa\n\n";
ASSERT(mg_http_parse(s, strlen(s), &req) == -1); ASSERT(mg_http_parse(s, strlen(s), &req) == -1);
} }
{ {
const char *s = "get b c\nz: k \nb: t\nv:k\n\n xx"; const char *s = "get b HTTP/1.1\nz: k \nb: t\nv:k\n\n xx";
ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3); ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3);
ASSERT(req.headers[3].name.len == 0); ASSERT(req.headers[3].name.len == 0);
ASSERT(vcmp(req.headers[0].name, "z")); ASSERT(vcmp(req.headers[0].name, "z"));
@ -1589,7 +1599,7 @@ static void test_http_parse(void) {
ASSERT(mg_http_parse("a b\na: \nb:\n\n", 12, &req) > 0); ASSERT(mg_http_parse("a b\na: \nb:\n\n", 12, &req) > 0);
{ {
const char *s = "ґєт /слеш вах вах\nмісто: кіїв \n\n"; const char *s = "ґєт /слеш HTTP/1.0\nмісто: кіїв \n\n";
ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s));
ASSERT(req.body.len == 0); ASSERT(req.body.len == 0);
ASSERT(req.headers[1].name.len == 0); ASSERT(req.headers[1].name.len == 0);
@ -1598,11 +1608,11 @@ static void test_http_parse(void) {
ASSERT((v = mg_http_get_header(&req, "місто")) != NULL); ASSERT((v = mg_http_get_header(&req, "місто")) != NULL);
ASSERT(vcmp(req.method, "ґєт")); ASSERT(vcmp(req.method, "ґєт"));
ASSERT(vcmp(req.uri, "/слеш")); ASSERT(vcmp(req.uri, "/слеш"));
ASSERT(vcmp(req.proto, "вах вах")); ASSERT(vcmp(req.proto, "HTTP/1.0"));
} }
{ {
const char *s = "a b c\r\nContent-Length: 21 \r\nb: t\r\nv:v\r\n\r\nabc"; const char *s = "a b HTTP/1.0\r\nContent-Length: 21 \r\nb: t\r\nv:v\r\n\r\nabc";
ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3); ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s) - 3);
ASSERT(req.body.len == 21); ASSERT(req.body.len == 21);
ASSERT(req.message.len == 21 - 3 + strlen(s)); ASSERT(req.message.len == 21 - 3 + strlen(s));
@ -1662,7 +1672,7 @@ static void test_http_parse(void) {
} }
{ {
static const char *s = "a b c\na:1\nb:2\nc:3\nd:4\ne:5\nf:6\ng:7\nh:8\n\n"; static const char *s = "a b HTTP/1.0\na:1\nb:2\nc:3\nd:4\ne:5\nf:6\ng:7\nh:8\n\n";
ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &req) == (int) strlen(s));
ASSERT((v = mg_http_get_header(&req, "e")) != NULL); ASSERT((v = mg_http_get_header(&req, "e")) != NULL);
ASSERT(vcmp(*v, "5")); ASSERT(vcmp(*v, "5"));
@ -1694,7 +1704,7 @@ static void test_http_parse(void) {
{ {
struct mg_http_message hm; struct mg_http_message hm;
const char *s = "a b c\n\n"; const char *s = "a b HTTP/1.0\n\n";
ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
s = "a b\nc:d\n\n"; s = "a b\nc:d\n\n";
ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
@ -1711,15 +1721,15 @@ static void test_http_parse(void) {
{ {
struct mg_http_message hm; struct mg_http_message hm;
const char *s; const char *s;
s = "a b c\nd:e\n\n"; s = "a b HTTP/1.0\nd:e\n\n";
ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
s = "a b c\nd: e\n\n"; s = "a b HTTP/1.0\nd: e\n\n";
ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
s = "a b c\nd:\te\n\n"; s = "a b HTTP/1.0\nd:\te\n\n";
ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
s = "a b c\nd:\t e\n\n"; s = "a b HTTP/1.0\nd:\t e\n\n";
ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
s = "a b c\nd: \te\t \n\n"; s = "a b HTTP/1.0\nd: \te\t \n\n";
ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s)); ASSERT(mg_http_parse(s, strlen(s), &hm) == (int) strlen(s));
ASSERT(mg_strcmp(hm.headers[0].value, mg_str("e")) == 0); ASSERT(mg_strcmp(hm.headers[0].value, mg_str("e")) == 0);
} }