173 lines
4.6 KiB
Go
173 lines
4.6 KiB
Go
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// Copyright 2017 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 auth
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import (
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"bytes"
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rand "crypto/rand"
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mrand "math/rand"
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"testing"
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)
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// Test cases are from RFC 4231, and match those present in the tests directory
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// of the download here: https://nacl.cr.yp.to/install.html
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var testCases = []struct {
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key [32]byte
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msg []byte
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out [32]byte
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}{
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{
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key: [32]byte{
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0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
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0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
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0x0b, 0x0b, 0x0b, 0x0b,
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},
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msg: []byte("Hi There"),
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out: [32]byte{
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0x87, 0xaa, 0x7c, 0xde, 0xa5, 0xef, 0x61, 0x9d,
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0x4f, 0xf0, 0xb4, 0x24, 0x1a, 0x1d, 0x6c, 0xb0,
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0x23, 0x79, 0xf4, 0xe2, 0xce, 0x4e, 0xc2, 0x78,
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0x7a, 0xd0, 0xb3, 0x05, 0x45, 0xe1, 0x7c, 0xde,
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},
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},
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{
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key: [32]byte{'J', 'e', 'f', 'e'},
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msg: []byte("what do ya want for nothing?"),
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out: [32]byte{
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0x16, 0x4b, 0x7a, 0x7b, 0xfc, 0xf8, 0x19, 0xe2,
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0xe3, 0x95, 0xfb, 0xe7, 0x3b, 0x56, 0xe0, 0xa3,
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0x87, 0xbd, 0x64, 0x22, 0x2e, 0x83, 0x1f, 0xd6,
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0x10, 0x27, 0x0c, 0xd7, 0xea, 0x25, 0x05, 0x54,
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},
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},
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{
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key: [32]byte{
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
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0xaa, 0xaa, 0xaa, 0xaa,
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},
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msg: []byte{ // 50 bytes of 0xdd
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,
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0xdd, 0xdd,
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},
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out: [32]byte{
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0xfa, 0x73, 0xb0, 0x08, 0x9d, 0x56, 0xa2, 0x84,
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0xef, 0xb0, 0xf0, 0x75, 0x6c, 0x89, 0x0b, 0xe9,
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0xb1, 0xb5, 0xdb, 0xdd, 0x8e, 0xe8, 0x1a, 0x36,
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0x55, 0xf8, 0x3e, 0x33, 0xb2, 0x27, 0x9d, 0x39,
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},
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},
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{
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key: [32]byte{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
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0x19,
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},
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msg: []byte{
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd,
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},
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out: [32]byte{
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0xb0, 0xba, 0x46, 0x56, 0x37, 0x45, 0x8c, 0x69,
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0x90, 0xe5, 0xa8, 0xc5, 0xf6, 0x1d, 0x4a, 0xf7,
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0xe5, 0x76, 0xd9, 0x7f, 0xf9, 0x4b, 0x87, 0x2d,
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0xe7, 0x6f, 0x80, 0x50, 0x36, 0x1e, 0xe3, 0xdb,
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},
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},
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}
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func TestSum(t *testing.T) {
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for i, test := range testCases {
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tag := Sum(test.msg, &test.key)
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if !bytes.Equal(tag[:], test.out[:]) {
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t.Errorf("#%d: Sum: got\n%x\nwant\n%x", i, tag, test.out)
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}
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}
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}
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func TestVerify(t *testing.T) {
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wrongMsg := []byte("unknown msg")
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for i, test := range testCases {
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if !Verify(test.out[:], test.msg, &test.key) {
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t.Errorf("#%d: Verify(%x, %q, %x) failed", i, test.out, test.msg, test.key)
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}
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if Verify(test.out[:], wrongMsg, &test.key) {
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t.Errorf("#%d: Verify(%x, %q, %x) unexpectedly passed", i, test.out, wrongMsg, test.key)
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}
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}
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}
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func TestStress(t *testing.T) {
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if testing.Short() {
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t.Skip("exhaustiveness test")
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}
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var key [32]byte
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msg := make([]byte, 10000)
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prng := mrand.New(mrand.NewSource(0))
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// copied from tests/auth5.c in nacl
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for i := 0; i < 10000; i++ {
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if _, err := rand.Read(key[:]); err != nil {
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t.Fatal(err)
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}
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if _, err := rand.Read(msg[:i]); err != nil {
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t.Fatal(err)
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}
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tag := Sum(msg[:i], &key)
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if !Verify(tag[:], msg[:i], &key) {
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t.Errorf("#%d: unexpected failure from Verify", i)
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}
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if i > 0 {
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msgIndex := prng.Intn(i)
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oldMsgByte := msg[msgIndex]
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msg[msgIndex] += byte(1 + prng.Intn(255))
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if Verify(tag[:], msg[:i], &key) {
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t.Errorf("#%d: unexpected success from Verify after corrupting message", i)
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}
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msg[msgIndex] = oldMsgByte
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tag[prng.Intn(len(tag))] += byte(1 + prng.Intn(255))
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if Verify(tag[:], msg[:i], &key) {
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t.Errorf("#%d: unexpected success from Verify after corrupting authenticator", i)
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}
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}
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}
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}
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func BenchmarkAuth(b *testing.B) {
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var key [32]byte
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if _, err := rand.Read(key[:]); err != nil {
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b.Fatal(err)
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}
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buf := make([]byte, 1024)
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if _, err := rand.Read(buf[:]); err != nil {
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b.Fatal(err)
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}
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b.SetBytes(int64(len(buf)))
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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tag := Sum(buf, &key)
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if Verify(tag[:], buf, &key) == false {
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b.Fatal("unexpected failure from Verify")
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}
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}
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}
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