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// Copyright 2012 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 ed25519
import (
"bufio"
"bytes"
"compress/gzip"
"crypto/rand"
"encoding/hex"
"io"
"os"
"strings"
"testing"
)
func TestSignVerify(t *testing.T) {
secretKey, publicKey := GenerateKey([32]byte{})
message := []byte("test message")
sig := Sign(secretKey, message)
if !Verify(publicKey, message, sig) {
t.Errorf("valid signature rejected")
}
wrongMessage := []byte("wrong message")
if Verify(publicKey, wrongMessage, sig) {
t.Errorf("signature of different message accepted")
}
}
func TestGolden(t *testing.T) {
// sign.input.gz is a selection of test cases from
// http://ed25519.cr.yp.to/python/sign.input
testDataZ, err := os.Open("testdata.gz")
if err != nil {
t.Fatal(err)
}
defer testDataZ.Close()
testData, err := gzip.NewReader(testDataZ)
if err != nil {
t.Fatal(err)
}
defer testData.Close()
in := bufio.NewReaderSize(testData, 1<<12)
lineNo := 0
for {
lineNo++
lineBytes, isPrefix, err := in.ReadLine()
if isPrefix {
t.Fatal("bufio buffer too small")
}
if err != nil {
if err == io.EOF {
break
}
t.Fatalf("error reading test data: %s", err)
}
line := string(lineBytes)
parts := strings.Split(line, ":")
if len(parts) != 5 {
t.Fatalf("bad number of parts on line %d", lineNo)
}
privBytes, _ := hex.DecodeString(parts[0])
pubKeyBytes, _ := hex.DecodeString(parts[1])
msg, _ := hex.DecodeString(parts[2])
sig, _ := hex.DecodeString(parts[3])
// The signatures in the test vectors also include the message
// at the end, but we just want R and S.
sig = sig[:SignatureSize]
if l := len(pubKeyBytes); l != PublicKeySize {
t.Fatalf("bad public key length on line %d: got %d bytes", lineNo, l)
}
priv := new([SecretKeySize]byte)
pub := new([PublicKeySize]byte)
copy(priv[:], privBytes)
copy(priv[32:], pubKeyBytes)
copy(pub[:], pubKeyBytes)
sig2 := Sign(priv, msg)
if !bytes.Equal(sig, sig2[:]) {
t.Errorf("different signature result on line %d: %x vs %x", lineNo, sig, sig2)
}
if !Verify(pub, msg, sig2) {
t.Errorf("signature failed to verify on line %d", lineNo)
}
}
}
func BenchmarkGenerateKeys(b *testing.B) {
var entropy [32]byte
for i := 0; i < b.N; i++ {
_, err := rand.Read(entropy[:])
if err != nil {
panic(err)
}
_, _ = GenerateKey(entropy)
}
}
func BenchmarkSign(b *testing.B) {
var entropy [32]byte
_, err := rand.Read(entropy[:])
if err != nil {
panic(err)
}
sk, _ := GenerateKey(entropy)
var secret [64]byte
copy(secret[:], sk[:])
b.ResetTimer()
message := make([]byte, 64)
for i := 0; i < b.N; i++ {
_, err := rand.Read(message)
if err != nil {
panic(err)
}
_ = Sign(sk, message)
}
}
func BenchmarkVerify(b *testing.B) {
var entropy [32]byte
_, err := rand.Read(entropy[:])
if err != nil {
panic(err)
}
sk, pk := GenerateKey(entropy)
b.ResetTimer()
message := make([]byte, 64)
for i := 0; i < b.N; i++ {
b.StopTimer()
_, err := rand.Read(message)
if err != nil {
panic(err)
}
sig := Sign(sk, message)
b.StartTimer()
ver := Verify(pk, message, sig)
if !ver {
panic(err)
}
}
}
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