252 lines
6.5 KiB
Go
252 lines
6.5 KiB
Go
// 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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"runtime"
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"strings"
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"testing"
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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 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 TestEqual(t *testing.T) {
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public, private, _ := GenerateKey(rand.Reader)
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if !public.Equal(public) {
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t.Errorf("public key is not equal to itself: %q", public)
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}
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if !public.Equal(crypto.Signer(private).Public()) {
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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: %q", private)
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}
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otherPub, otherPriv, _ := GenerateKey(rand.Reader)
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if public.Equal(otherPub) {
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t.Errorf("different public keys are Equal")
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}
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if private.Equal(otherPriv) {
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t.Errorf("different private keys are Equal")
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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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priv2 := NewKeyFromSeed(priv[:32])
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if !bytes.Equal(priv[:], priv2) {
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t.Errorf("recreating key pair gave different private key on line %d: %x vs %x", lineNo, priv[:], priv2)
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}
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if pubKey2 := priv2.Public().(PublicKey); !bytes.Equal(pubKey, pubKey2) {
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t.Errorf("recreating key pair gave different public key on line %d: %x vs %x", lineNo, pubKey, pubKey2)
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}
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if seed := priv2.Seed(); !bytes.Equal(priv[:32], seed) {
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t.Errorf("recreating key pair gave different seed on line %d: %x vs %x", lineNo, priv[:32], seed)
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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 TestMalleability(t *testing.T) {
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// https://tools.ietf.org/html/rfc8032#section-5.1.7 adds an additional test
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// that s be in [0, order). This prevents someone from adding a multiple of
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// order to s and obtaining a second valid signature for the same message.
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msg := []byte{0x54, 0x65, 0x73, 0x74}
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sig := []byte{
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0x7c, 0x38, 0xe0, 0x26, 0xf2, 0x9e, 0x14, 0xaa, 0xbd, 0x05, 0x9a,
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0x0f, 0x2d, 0xb8, 0xb0, 0xcd, 0x78, 0x30, 0x40, 0x60, 0x9a, 0x8b,
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0xe6, 0x84, 0xdb, 0x12, 0xf8, 0x2a, 0x27, 0x77, 0x4a, 0xb0, 0x67,
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0x65, 0x4b, 0xce, 0x38, 0x32, 0xc2, 0xd7, 0x6f, 0x8f, 0x6f, 0x5d,
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0xaf, 0xc0, 0x8d, 0x93, 0x39, 0xd4, 0xee, 0xf6, 0x76, 0x57, 0x33,
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0x36, 0xa5, 0xc5, 0x1e, 0xb6, 0xf9, 0x46, 0xb3, 0x1d,
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}
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publicKey := []byte{
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0x7d, 0x4d, 0x0e, 0x7f, 0x61, 0x53, 0xa6, 0x9b, 0x62, 0x42, 0xb5,
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0x22, 0xab, 0xbe, 0xe6, 0x85, 0xfd, 0xa4, 0x42, 0x0f, 0x88, 0x34,
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0xb1, 0x08, 0xc3, 0xbd, 0xae, 0x36, 0x9e, 0xf5, 0x49, 0xfa,
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}
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if Verify(publicKey, msg, sig) {
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t.Fatal("non-canonical signature accepted")
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}
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}
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func TestAllocations(t *testing.T) {
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if runtime.Compiler == "gccgo" {
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t.Skip("gofronted escape analysis not good enough")
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}
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if strings.HasSuffix(os.Getenv("GO_BUILDER_NAME"), "-noopt") {
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t.Skip("skipping allocations test without relevant optimizations")
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}
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if allocs := testing.AllocsPerRun(100, func() {
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seed := make([]byte, SeedSize)
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message := []byte("Hello, world!")
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priv := NewKeyFromSeed(seed)
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pub := priv.Public().(PublicKey)
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signature := Sign(priv, message)
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if !Verify(pub, message, signature) {
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t.Fatal("signature didn't verify")
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}
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}); allocs > 0 {
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t.Errorf("expected zero allocations, got %0.1v", allocs)
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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 BenchmarkNewKeyFromSeed(b *testing.B) {
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seed := make([]byte, SeedSize)
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for i := 0; i < b.N; i++ {
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_ = NewKeyFromSeed(seed)
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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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