Legacy digests can have custom control values

Fixes #10915.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10916)

diff --git a/crypto/evp/digest.c b/crypto/evp/digest.c
index adde3e13aba583bf4a65393fa2e77986645b4d2e..9808b66bbd53a6520cb8d510d8646d8d316e9989 100644 (file)
--- a/crypto/evp/digest.c
+++ b/crypto/evp/digest.c
@@ -663,7 +663,7 @@ int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
     }
 
     if (ctx->digest->prov == NULL
-        && (ctx->pctx == NULL
+        || (ctx->pctx == NULL
             || (ctx->pctx->operation != EVP_PKEY_OP_VERIFYCTX
                 && ctx->pctx->operation != EVP_PKEY_OP_SIGNCTX)))
         goto legacy;