Katie Hockman
97fc981609
Change-Id: Ibd6ce156550615cb85c06e734641c34fca0cfcd0 Reviewed-on: https://go-review.googlesource.com/c/crypto/+/220697 Run-TryBot: Katie Hockman <katie@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Filippo Valsorda <filippo@golang.org>
34 lines
726 B
Go
34 lines
726 B
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build !go1.15
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// ecdsa.VerifyASN1 was added in Go 1.15.
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package wycheproof
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import (
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"crypto/ecdsa"
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"math/big"
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"golang.org/x/crypto/cryptobyte"
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"golang.org/x/crypto/cryptobyte/asn1"
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)
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func verifyASN1(pub *ecdsa.PublicKey, hash, sig []byte) bool {
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var (
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r, s = &big.Int{}, &big.Int{}
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inner cryptobyte.String
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)
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input := cryptobyte.String(sig)
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if !input.ReadASN1(&inner, asn1.SEQUENCE) ||
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!input.Empty() ||
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!inner.ReadASN1Integer(r) ||
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!inner.ReadASN1Integer(s) ||
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!inner.Empty() {
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return false
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}
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return ecdsa.Verify(pub, hash, r, s)
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}
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