Don't require a default digest from signature algorithms

Some signature algorithms don't need a default digest, so don't fail if
we don't have one.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/12637)

diff --git a/crypto/evp/m_sigver.c b/crypto/evp/m_sigver.c
index 8fb9de07fe61b705765077b0c9d3bb95a99dbc96..0278d9ca09ae819879919e8f318a75adf2642b11 100644 (file)
--- a/crypto/evp/m_sigver.c
+++ b/crypto/evp/m_sigver.c
@@ -172,9 +172,6 @@ static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                                                        locmdname,
                                                        sizeof(locmdname)) > 0) {
                 mdname = canon_mdname(locmdname);
-            } else {
-                EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
-                return 0;
             }
         }