Stricter boundary condition check in HMAC_Init_ex.

diff --git a/crypto/hmac/hmac.c b/crypto/hmac/hmac.c
index 50765e227bf2ef0a3a0c134537dc390c7bff4d23..b1aa05b2eaa5b2b2e3a8cbc79f81307286b05f47 100644 (file)
--- a/crypto/hmac/hmac.c
+++ b/crypto/hmac/hmac.c
@@ -89,7 +89,7 @@ void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
                        }
                else
                        {
                        }
                else
                        {

-                       OPENSSL_assert(len <= (int)sizeof(ctx->key));
+                       OPENSSL_assert(len>0 && len <= (int)sizeof(ctx->key));

                        memcpy(ctx->key,key,len);
                        ctx->key_length=len;
                        }
                        memcpy(ctx->key,key,len);
                        ctx->key_length=len;
                        }