75 lines
2.1 KiB
Go
75 lines
2.1 KiB
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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package ecdsa_test
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import (
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"crypto"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/x509"
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"testing"
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)
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func testEqual(t *testing.T, c elliptic.Curve) {
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private, _ := ecdsa.GenerateKey(c, rand.Reader)
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public := &private.PublicKey
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if !public.Equal(public) {
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t.Errorf("public key is not equal to itself: %v", public)
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}
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if !public.Equal(crypto.Signer(private).Public().(*ecdsa.PublicKey)) {
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t.Errorf("private.Public() is not Equal to public: %q", public)
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}
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if !private.Equal(private) {
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t.Errorf("private key is not equal to itself: %v", private)
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}
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enc, err := x509.MarshalPKCS8PrivateKey(private)
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if err != nil {
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t.Fatal(err)
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}
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decoded, err := x509.ParsePKCS8PrivateKey(enc)
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if err != nil {
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t.Fatal(err)
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}
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if !public.Equal(decoded.(crypto.Signer).Public()) {
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t.Errorf("public key is not equal to itself after decoding: %v", public)
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}
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if !private.Equal(decoded) {
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t.Errorf("private key is not equal to itself after decoding: %v", private)
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}
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other, _ := ecdsa.GenerateKey(c, rand.Reader)
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if public.Equal(other.Public()) {
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t.Errorf("different public keys are Equal")
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}
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if private.Equal(other) {
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t.Errorf("different private keys are Equal")
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}
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// Ensure that keys with the same coordinates but on different curves
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// aren't considered Equal.
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differentCurve := &ecdsa.PublicKey{}
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*differentCurve = *public // make a copy of the public key
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if differentCurve.Curve == elliptic.P256() {
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differentCurve.Curve = elliptic.P224()
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} else {
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differentCurve.Curve = elliptic.P256()
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}
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if public.Equal(differentCurve) {
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t.Errorf("public keys with different curves are Equal")
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}
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}
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func TestEqual(t *testing.T) {
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t.Run("P224", func(t *testing.T) { testEqual(t, elliptic.P224()) })
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if testing.Short() {
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return
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}
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t.Run("P256", func(t *testing.T) { testEqual(t, elliptic.P256()) })
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t.Run("P384", func(t *testing.T) { testEqual(t, elliptic.P384()) })
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t.Run("P521", func(t *testing.T) { testEqual(t, elliptic.P521()) })
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}
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