mirror of
https://github.com/restic/restic.git
synced 2024-08-25 13:47:22 +02:00
184 lines
4.0 KiB
Go
184 lines
4.0 KiB
Go
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// Copyright 2016 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 ed25519
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import (
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"bufio"
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"bytes"
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"compress/gzip"
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"crypto"
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"crypto/rand"
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"encoding/hex"
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"os"
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"strings"
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"testing"
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"golang.org/x/crypto/ed25519/internal/edwards25519"
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)
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type zeroReader struct{}
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func (zeroReader) Read(buf []byte) (int, error) {
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for i := range buf {
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buf[i] = 0
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}
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return len(buf), nil
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}
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func TestUnmarshalMarshal(t *testing.T) {
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pub, _, _ := GenerateKey(rand.Reader)
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var A edwards25519.ExtendedGroupElement
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var pubBytes [32]byte
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copy(pubBytes[:], pub)
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if !A.FromBytes(&pubBytes) {
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t.Fatalf("ExtendedGroupElement.FromBytes failed")
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}
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var pub2 [32]byte
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A.ToBytes(&pub2)
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if pubBytes != pub2 {
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t.Errorf("FromBytes(%v)->ToBytes does not round-trip, got %x\n", pubBytes, pub2)
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}
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}
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func TestSignVerify(t *testing.T) {
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var zero zeroReader
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public, private, _ := GenerateKey(zero)
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message := []byte("test message")
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sig := Sign(private, message)
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if !Verify(public, message, sig) {
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t.Errorf("valid signature rejected")
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}
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wrongMessage := []byte("wrong message")
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if Verify(public, wrongMessage, sig) {
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t.Errorf("signature of different message accepted")
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}
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}
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func TestCryptoSigner(t *testing.T) {
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var zero zeroReader
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public, private, _ := GenerateKey(zero)
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signer := crypto.Signer(private)
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publicInterface := signer.Public()
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public2, ok := publicInterface.(PublicKey)
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if !ok {
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t.Fatalf("expected PublicKey from Public() but got %T", publicInterface)
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}
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if !bytes.Equal(public, public2) {
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t.Errorf("public keys do not match: original:%x vs Public():%x", public, public2)
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}
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message := []byte("message")
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var noHash crypto.Hash
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signature, err := signer.Sign(zero, message, noHash)
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if err != nil {
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t.Fatalf("error from Sign(): %s", err)
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}
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if !Verify(public, message, signature) {
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t.Errorf("Verify failed on signature from Sign()")
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}
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}
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func TestGolden(t *testing.T) {
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// sign.input.gz is a selection of test cases from
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// https://ed25519.cr.yp.to/python/sign.input
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testDataZ, err := os.Open("testdata/sign.input.gz")
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if err != nil {
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t.Fatal(err)
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}
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defer testDataZ.Close()
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testData, err := gzip.NewReader(testDataZ)
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if err != nil {
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t.Fatal(err)
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}
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defer testData.Close()
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scanner := bufio.NewScanner(testData)
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lineNo := 0
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for scanner.Scan() {
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lineNo++
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line := scanner.Text()
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parts := strings.Split(line, ":")
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if len(parts) != 5 {
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t.Fatalf("bad number of parts on line %d", lineNo)
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}
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privBytes, _ := hex.DecodeString(parts[0])
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pubKey, _ := hex.DecodeString(parts[1])
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msg, _ := hex.DecodeString(parts[2])
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sig, _ := hex.DecodeString(parts[3])
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// The signatures in the test vectors also include the message
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// at the end, but we just want R and S.
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sig = sig[:SignatureSize]
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if l := len(pubKey); l != PublicKeySize {
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t.Fatalf("bad public key length on line %d: got %d bytes", lineNo, l)
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}
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var priv [PrivateKeySize]byte
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copy(priv[:], privBytes)
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copy(priv[32:], pubKey)
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sig2 := Sign(priv[:], msg)
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if !bytes.Equal(sig, sig2[:]) {
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t.Errorf("different signature result on line %d: %x vs %x", lineNo, sig, sig2)
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}
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if !Verify(pubKey, msg, sig2) {
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t.Errorf("signature failed to verify on line %d", lineNo)
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}
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}
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if err := scanner.Err(); err != nil {
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t.Fatalf("error reading test data: %s", err)
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}
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}
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func BenchmarkKeyGeneration(b *testing.B) {
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var zero zeroReader
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for i := 0; i < b.N; i++ {
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if _, _, err := GenerateKey(zero); err != nil {
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b.Fatal(err)
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}
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}
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}
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func BenchmarkSigning(b *testing.B) {
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var zero zeroReader
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_, priv, err := GenerateKey(zero)
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if err != nil {
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b.Fatal(err)
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}
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message := []byte("Hello, world!")
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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Sign(priv, message)
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}
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}
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func BenchmarkVerification(b *testing.B) {
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var zero zeroReader
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pub, priv, err := GenerateKey(zero)
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if err != nil {
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b.Fatal(err)
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}
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message := []byte("Hello, world!")
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signature := Sign(priv, message)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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Verify(pub, message, signature)
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}
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}
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