--- /dev/null
+// Copyright 2016 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"
+ "crypto/ed25519/internal/edwards25519"
+ "crypto/rand"
+ "encoding/hex"
+ "os"
+ "strings"
+ "testing"
+)
+
+type zeroReader struct{}
+
+func (zeroReader) Read(buf []byte) (int, error) {
+ for i := range buf {
+ buf[i] = 0
+ }
+ return len(buf), nil
+}
+
+func TestUnmarshalMarshal(t *testing.T) {
+ pub, _, _ := GenerateKey(rand.Reader)
+
+ var A edwards25519.ExtendedGroupElement
+ var pubBytes [32]byte
+ copy(pubBytes[:], pub)
+ if !A.FromBytes(&pubBytes) {
+ t.Fatalf("ExtendedGroupElement.FromBytes failed")
+ }
+
+ var pub2 [32]byte
+ A.ToBytes(&pub2)
+
+ if pubBytes != pub2 {
+ t.Errorf("FromBytes(%v)->ToBytes does not round-trip, got %x\n", pubBytes, pub2)
+ }
+}
+
+func TestSignVerify(t *testing.T) {
+ var zero zeroReader
+ public, private, _ := GenerateKey(zero)
+
+ message := []byte("test message")
+ sig := Sign(private, message)
+ if !Verify(public, message, sig) {
+ t.Errorf("valid signature rejected")
+ }
+
+ wrongMessage := []byte("wrong message")
+ if Verify(public, wrongMessage, sig) {
+ t.Errorf("signature of different message accepted")
+ }
+}
+
+func TestCryptoSigner(t *testing.T) {
+ var zero zeroReader
+ public, private, _ := GenerateKey(zero)
+
+ signer := crypto.Signer(private)
+
+ publicInterface := signer.Public()
+ public2, ok := publicInterface.(PublicKey)
+ if !ok {
+ t.Fatalf("expected PublicKey from Public() but got %T", publicInterface)
+ }
+
+ if !bytes.Equal(public, public2) {
+ t.Errorf("public keys do not match: original:%x vs Public():%x", public, public2)
+ }
+
+ message := []byte("message")
+ var noHash crypto.Hash
+ signature, err := signer.Sign(zero, message, noHash)
+ if err != nil {
+ t.Fatalf("error from Sign(): %s", err)
+ }
+
+ if !Verify(public, message, signature) {
+ t.Errorf("Verify failed on signature from Sign()")
+ }
+}
+
+func TestGolden(t *testing.T) {
+ // sign.input.gz is a selection of test cases from
+ // https://ed25519.cr.yp.to/python/sign.input
+ testDataZ, err := os.Open("testdata/sign.input.gz")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer testDataZ.Close()
+ testData, err := gzip.NewReader(testDataZ)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer testData.Close()
+
+ scanner := bufio.NewScanner(testData)
+ lineNo := 0
+
+ for scanner.Scan() {
+ lineNo++
+
+ line := scanner.Text()
+ parts := strings.Split(line, ":")
+ if len(parts) != 5 {
+ t.Fatalf("bad number of parts on line %d", lineNo)
+ }
+
+ privBytes, _ := hex.DecodeString(parts[0])
+ pubKey, _ := 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(pubKey); l != PublicKeySize {
+ t.Fatalf("bad public key length on line %d: got %d bytes", lineNo, l)
+ }
+
+ var priv [PrivateKeySize]byte
+ copy(priv[:], privBytes)
+ copy(priv[32:], pubKey)
+
+ 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(pubKey, msg, sig2) {
+ t.Errorf("signature failed to verify on line %d", lineNo)
+ }
+
+ priv2 := NewKeyFromSeed(priv[:32])
+ if !bytes.Equal(priv[:], priv2) {
+ t.Errorf("recreating key pair gave different private key on line %d: %x vs %x", lineNo, priv[:], priv2)
+ }
+
+ if pubKey2 := priv2.Public().(PublicKey); !bytes.Equal(pubKey, pubKey2) {
+ t.Errorf("recreating key pair gave different public key on line %d: %x vs %x", lineNo, pubKey, pubKey2)
+ }
+
+ if seed := priv2.Seed(); !bytes.Equal(priv[:32], seed) {
+ t.Errorf("recreating key pair gave different seed on line %d: %x vs %x", lineNo, priv[:32], seed)
+ }
+ }
+
+ if err := scanner.Err(); err != nil {
+ t.Fatalf("error reading test data: %s", err)
+ }
+}
+
+func TestMalleability(t *testing.T) {
+ // https://tools.ietf.org/html/rfc8032#section-5.1.7 adds an additional test
+ // that s be in [0, order). This prevents someone from adding a multiple of
+ // order to s and obtaining a second valid signature for the same message.
+ msg := []byte{0x54, 0x65, 0x73, 0x74}
+ sig := []byte{
+ 0x7c, 0x38, 0xe0, 0x26, 0xf2, 0x9e, 0x14, 0xaa, 0xbd, 0x05, 0x9a,
+ 0x0f, 0x2d, 0xb8, 0xb0, 0xcd, 0x78, 0x30, 0x40, 0x60, 0x9a, 0x8b,
+ 0xe6, 0x84, 0xdb, 0x12, 0xf8, 0x2a, 0x27, 0x77, 0x4a, 0xb0, 0x67,
+ 0x65, 0x4b, 0xce, 0x38, 0x32, 0xc2, 0xd7, 0x6f, 0x8f, 0x6f, 0x5d,
+ 0xaf, 0xc0, 0x8d, 0x93, 0x39, 0xd4, 0xee, 0xf6, 0x76, 0x57, 0x33,
+ 0x36, 0xa5, 0xc5, 0x1e, 0xb6, 0xf9, 0x46, 0xb3, 0x1d,
+ }
+ publicKey := []byte{
+ 0x7d, 0x4d, 0x0e, 0x7f, 0x61, 0x53, 0xa6, 0x9b, 0x62, 0x42, 0xb5,
+ 0x22, 0xab, 0xbe, 0xe6, 0x85, 0xfd, 0xa4, 0x42, 0x0f, 0x88, 0x34,
+ 0xb1, 0x08, 0xc3, 0xbd, 0xae, 0x36, 0x9e, 0xf5, 0x49, 0xfa,
+ }
+
+ if Verify(publicKey, msg, sig) {
+ t.Fatal("non-canonical signature accepted")
+ }
+}
+
+func BenchmarkKeyGeneration(b *testing.B) {
+ var zero zeroReader
+ for i := 0; i < b.N; i++ {
+ if _, _, err := GenerateKey(zero); err != nil {
+ b.Fatal(err)
+ }
+ }
+}
+
+func BenchmarkSigning(b *testing.B) {
+ var zero zeroReader
+ _, priv, err := GenerateKey(zero)
+ if err != nil {
+ b.Fatal(err)
+ }
+ message := []byte("Hello, world!")
+ b.ResetTimer()
+ for i := 0; i < b.N; i++ {
+ Sign(priv, message)
+ }
+}
+
+func BenchmarkVerification(b *testing.B) {
+ var zero zeroReader
+ pub, priv, err := GenerateKey(zero)
+ if err != nil {
+ b.Fatal(err)
+ }
+ message := []byte("Hello, world!")
+ signature := Sign(priv, message)
+ b.ResetTimer()
+ for i := 0; i < b.N; i++ {
+ Verify(pub, message, signature)
+ }
+}