Handle NULL parameter in some EVP utility functions.

18096abb · Dr. Stephen Henson · 0aa08a2e · 18096abb
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crypto/evp/evp_lib.c crypto/evp/evp_lib.c +4 -0

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--- a/crypto/evp/evp_lib.c
+++ b/crypto/evp/evp_lib.c
@@ -255,11 +255,15 @@ int EVP_MD_pkey_type(const EVP_MD *md)
 int EVP_MD_size(const EVP_MD *md)
 	{
+	if (!md)
+		return -1;
 	return md->md_size;
 	}
 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
 	{
+	if (!ctx)
+		return NULL;
 	return ctx->digest;
 	}