blob: 4246c943eefc27df9290c00ef4cf0dbbe77e299a [file] [log] [blame]
// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package ecdsa provides an internal version of ecdsa.Verify
// that is used for the Wycheproof tests.
package ecdsa
import (
// VerifyASN1 verifies the ASN1 encoded signature, sig, of hash using the
// public key, pub. Its return value records whether the signature is valid.
func VerifyASN1(pub *ecdsa.PublicKey, hash, sig []byte) bool {
var (
r, s = &big.Int{}, &big.Int{}
inner cryptobyte.String
input := cryptobyte.String(sig)
if !input.ReadASN1(&inner, asn1.SEQUENCE) ||
!input.Empty() ||
!inner.ReadASN1Integer(r) ||
!inner.ReadASN1Integer(s) ||
!inner.Empty() {
return false
return ecdsa.Verify(pub, hash, r, s)