Ignore NULL parameter in EVP_MD_CTX_destroy.

(cherry picked from commit a6c62f0c25a756c263a80ce52afbae888028e986)

diff --git a/crypto/evp/digest.c b/crypto/evp/digest.c
index cfd5401dbd2380ae67a802e43eb74d7fdf4b6e31..87317572fe621b4e6ae13207c572dff5cd3419af 100644 (file)
--- a/crypto/evp/digest.c
+++ b/crypto/evp/digest.c
@@ -379,8 +379,11 @@ int EVP_Digest(const void *data, size_t count,
 
 void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
        {
 
 void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
        {

-       EVP_MD_CTX_cleanup(ctx);
-       OPENSSL_free(ctx);
+       if (ctx)
+               {
+               EVP_MD_CTX_cleanup(ctx);
+               OPENSSL_free(ctx);
+               }

        }
 
 /* This call frees resources associated with the context */
        }
 
 /* This call frees resources associated with the context */