Update to openssl-1.0.2crelease/external-1.17.0.0-x

1 files changed, 13 insertions, 3 deletions

diff --git a/openssl/ssl/s3_cbc.c b/openssl/ssl/s3_cbc.c
index f31dc046f..a0edcef90 100644
--- a/openssl/ssl/s3_cbc.c
+++ b/openssl/ssl/s3_cbc.c
@@ -149,7 +149,7 @@ int tls1_cbc_remove_padding(const SSL *s,
      */
     if ((s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) && !s->expand) {
         /* First packet is even in size, so check */
-        if ((memcmp(s->s3->read_sequence, "\0\0\0\0\0\0\0\0", 8) == 0) &&
+        if ((CRYPTO_memcmp(s->s3->read_sequence, "\0\0\0\0\0\0\0\0", 8) == 0) &&
             !(padding_length & 1)) {
             s->s3->flags |= TLS1_FLAGS_TLS_PADDING_BUG;
         }
@@ -639,12 +639,22 @@ void ssl3_cbc_digest_record(const EVP_MD_CTX *ctx,
 
     if (k > 0) {
         if (is_sslv3) {
+            unsigned overhang;
+
             /*
              * The SSLv3 header is larger than a single block. overhang is
              * the number of bytes beyond a single block that the header
-             * consumes: either 7 bytes (SHA1) or 11 bytes (MD5).
+             * consumes: either 7 bytes (SHA1) or 11 bytes (MD5). There are no
+             * ciphersuites in SSLv3 that are not SHA1 or MD5 based and
+             * therefore we can be confident that the header_length will be
+             * greater than |md_block_size|. However we add a sanity check just
+             * in case
              */
-            unsigned overhang = header_length - md_block_size;
+            if (header_length <= md_block_size) {
+                /* Should never happen */
+                return;
+            }
+            overhang = header_length - md_block_size;
             md_transform(md_state.c, header);
             memcpy(first_block, header + md_block_size, overhang);
             memcpy(first_block + overhang, data, md_block_size - overhang);