EVP_VerifyFinal_ex
return EVP_VerifyFinal_ex(ctx, sigbuf, siglen, pkey, NULL, NULL);
i = EVP_VerifyFinal_ex(mdc_tmp, os->data, os->length, pkey, libctx, propq);
__owur int EVP_VerifyFinal_ex(EVP_MD_CTX *ctx, const unsigned char *sigbuf,