1 files changed, 3 insertions, 0 deletions

diff --git a/src/lib/libcrypto/hmac/hmac.c b/src/lib/libcrypto/hmac/hmac.c
index da363b7950..4c91f919d5 100644
--- a/src/lib/libcrypto/hmac/hmac.c
+++ b/src/lib/libcrypto/hmac/hmac.c
@@ -59,6 +59,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <openssl/hmac.h>
+#include "cryptlib.h"
 
 void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
                   const EVP_MD *md, ENGINE *impl)
@@ -78,6 +79,7 @@ void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
                 {
                 reset=1;
                 j=EVP_MD_block_size(md);
+                OPENSSL_assert(j <= sizeof ctx->key);
                 if (j < len)
                         {
                         EVP_DigestInit_ex(&ctx->md_ctx,md, impl);
@@ -87,6 +89,7 @@ void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
                         }
                 else
                         {
+                        OPENSSL_assert(len <= sizeof ctx->key);
                         memcpy(ctx->key,key,len);
                         ctx->key_length=len;
                         }