From c655f40ed2eb291adf3e23264b7535b7487efe50 Mon Sep 17 00:00:00 2001 From: Trevor Perrin Date: Fri, 13 Sep 2013 19:32:55 -0700 Subject: [PATCH] Require ServerInfo PEMs to be named "BEGIN SERVERINFO FOR"... --- ssl/ssl_rsa.c | 16 ++++++++++++++-- test/serverinfo.pem | 8 ++++---- 2 files changed, 18 insertions(+), 6 deletions(-) diff --git a/ssl/ssl_rsa.c b/ssl/ssl_rsa.c index b6765a30e1..36d7a1a819 100644 --- a/ssl/ssl_rsa.c +++ b/ssl/ssl_rsa.c @@ -982,6 +982,7 @@ int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file) long extension_length = 0; char* name = NULL; char* header = NULL; + char namePrefix[] = "SERVERINFO FOR "; int ret = 0; BIO *bin = NULL; size_t num_extensions = 0; @@ -1017,11 +1018,22 @@ int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file) else /* End of file, we're done */ break; } + /* Check that PEM name starts with "BEGIN SERVERINFO FOR " */ + if (strlen(name) < strlen(namePrefix)) + { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_PEM_LIB); + goto end; + } + if (strncmp(name, namePrefix, strlen(namePrefix)) != 0) + { + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_PEM_LIB); + goto end; + } /* Check that the decoded PEM data is plausible (valid length field) */ if (extension_length < 4 || (extension[2] << 8) + extension[3] != extension_length - 4) { - SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_PEM_LIB); - goto end; + SSLerr(SSL_F_SSL_CTX_USE_SERVERINFO_FILE, ERR_R_PEM_LIB); + goto end; } /* Append the decoded extension to the serverinfo buffer */ serverinfo = OPENSSL_realloc(serverinfo, serverinfo_length + extension_length); diff --git a/test/serverinfo.pem b/test/serverinfo.pem index 0eb020a17f..cd3020e3b8 100644 --- a/test/serverinfo.pem +++ b/test/serverinfo.pem @@ -1,10 +1,10 @@ ------BEGIN SCT----- +-----BEGIN SERVERINFO FOR CT----- ABIAZMevsj4TC5rgwjZNciLGwh15YXoIK9t5aypGJIG4QzyMowmwwDdqxudkUcGa DvuqlYL7psO5j4/BIHTe677CAZBBH3Ho2NOM5q1zub4AbfUMlKeufuQgeQ2Tj1oe LJLRzrwDnPs= ------END SCT----- +-----END SERVERINFO FOR CT----- ------BEGIN TACK EXTENSION----- +-----BEGIN SERVERINFO FOR TACK----- 8wABTwFMh1Dz+3W6zULWJKjav5TNaFEXL1h98YtCXeyZnORYg4mbKpxH5CMbjpgx To3amSqUPF4Ntjc/i9+poutxebYkbgAAAkMcxb8+RaM9YEywaJEGViKJJmpYG/gJ HgfGaefI9kKbXSDmP9ntg8dLvDzuyYw14ktM2850Q9WvBiltpekilZxVuT2bFtfs @@ -13,4 +13,4 @@ ffGLQl3smZzkWIOJmyqcR+QjG46YMU6N2pkqlDxeDbY3P4vfqaLrcXm2JG4AAAGN xXQJPbdniI9rEydVXb1Cu1yT/t7FBEx6hLxuoypXjCI1wCGpXsd8zEnloR0Ank5h VO/874E/BZlItzSPpcmDKl5Def6BrAJTErQlE9npo52S05YWORxJw1+VYBdqQ09A x3wA ------END TACK EXTENSION----- +-----END SERVERINFO FOR TACK----- -- 2.25.1