Don't crash if an unrecognised digest is used with dsa_paramgen_md
@@ -189,9 +189,15 @@ static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
NULL);
}
if (strcmp(type, "dsa_paramgen_md") == 0) {
+ const EVP_MD *md = EVP_get_digestbyname(value);
+
+ if (md == NULL) {
+ DSAerr(DSA_F_PKEY_DSA_CTRL_STR, DSA_R_INVALID_DIGEST_TYPE);
+ return 0;
+ }
return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
- (void *)EVP_get_digestbyname(value));
+ (void *)md);
}
return -2;
}
