Handle the case where there is no digest in an EVP_MD_CTX

[openssl.git] / crypto / evp / digest.c

diff --git a/crypto/evp/digest.c b/crypto/evp/digest.c
index be6fcb58f175644703734e1039a5e64004598083..040a92dc5fc3f160cf5a5b6a52d2b4dab222632d 100644 (file)
--- a/crypto/evp/digest.c
+++ b/crypto/evp/digest.c
@@ -657,12 +657,12 @@ int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
     size_t sz;
     OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
 
-    if (ctx == NULL || ctx->digest == NULL) {
-        ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL);
+    if (ctx == NULL) {
+        ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
         return 0;
     }
 
-    if (ctx->digest->prov == NULL)
+    if (ctx->digest != NULL && ctx->digest->prov == NULL)
         goto legacy;
 
     switch (cmd) {