mirror of
https://github.com/henrydcase/nobs.git
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475 lines
13 KiB
Go
475 lines
13 KiB
Go
// Copyright 2014 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 sha3
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// Tests include all the ShortMsgKATs provided by the Keccak team at
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// https://github.com/gvanas/KeccakCodePackage
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//
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// They only include the zero-bit case of the bitwise testvectors
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// published by NIST in the draft of FIPS-202.
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import (
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"bytes"
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"compress/flate"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"hash"
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"os"
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"strings"
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"testing"
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)
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const (
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testString = "brekeccakkeccak koax koax"
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katFilename = "testdata/keccakKats.json.deflate"
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)
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// testDigests contains functions returning hash.Hash instances
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// with output-length equal to the KAT length for SHA-3, Keccak
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// and SHAKE instances.
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var testDigests = map[string]func() hash.Hash{
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"SHA3-224": New224,
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"SHA3-256": New256,
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"SHA3-384": New384,
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"SHA3-512": New512,
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"Keccak-256": NewLegacyKeccak256,
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}
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// testShakes contains functions that return sha3.ShakeHash instances for
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// with output-length equal to the KAT length.
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var testShakes = map[string]struct {
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constructor func(N []byte, S []byte) ShakeHash
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defAlgoName string
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defCustomStr string
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}{
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// NewCShake without customization produces same result as SHAKE
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"SHAKE128": {NewCShake128, "", ""},
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"SHAKE256": {NewCShake256, "", ""},
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"cSHAKE128": {NewCShake128, "CSHAKE128", "CustomStrign"},
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"cSHAKE256": {NewCShake256, "CSHAKE256", "CustomStrign"},
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}
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// decodeHex converts a hex-encoded string into a raw byte string.
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func decodeHex(s string) []byte {
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b, err := hex.DecodeString(s)
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if err != nil {
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panic(err)
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}
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return b
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}
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// structs used to marshal JSON test-cases.
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type KeccakKats struct {
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Kats map[string][]struct {
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Digest string `json:"digest"`
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Length int64 `json:"length"`
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Message string `json:"message"`
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// Defined only for cSHAKE
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N string `json:"N"`
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S string `json:"S"`
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}
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}
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func testUnalignedAndGeneric(t *testing.T, testf func(impl string)) {
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xorInOrig, copyOutOrig := xorIn, copyOut
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xorIn, copyOut = xorInGeneric, copyOutGeneric
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testf("generic")
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if xorImplementationUnaligned != "generic" {
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xorIn, copyOut = xorInUnaligned, copyOutUnaligned
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testf("unaligned")
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}
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xorIn, copyOut = xorInOrig, copyOutOrig
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}
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// TestKeccakKats tests the SHA-3 and Shake implementations against all the
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// ShortMsgKATs from https://github.com/gvanas/KeccakCodePackage
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// (The testvectors are stored in keccakKats.json.deflate due to their length.)
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func TestKeccakKats(t *testing.T) {
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testUnalignedAndGeneric(t, func(impl string) {
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// Read the KATs.
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deflated, err := os.Open(katFilename)
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if err != nil {
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t.Errorf("error opening %s: %s", katFilename, err)
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}
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file := flate.NewReader(deflated)
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dec := json.NewDecoder(file)
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var katSet KeccakKats
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err = dec.Decode(&katSet)
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if err != nil {
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t.Errorf("error decoding KATs: %s", err)
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}
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for algo, function := range testDigests {
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d := function()
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for _, kat := range katSet.Kats[algo] {
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d.Reset()
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in, err := hex.DecodeString(kat.Message)
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if err != nil {
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t.Errorf("error decoding KAT: %s", err)
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}
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d.Write(in[:kat.Length/8])
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got := strings.ToUpper(hex.EncodeToString(d.Sum(nil)))
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if got != kat.Digest {
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t.Errorf("function=%s, implementation=%s, length=%d\nmessage:\n %s\ngot:\n %s\nwanted:\n %s",
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algo, impl, kat.Length, kat.Message, got, kat.Digest)
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t.Logf("wanted %+v", kat)
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t.FailNow()
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}
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continue
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}
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}
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for algo, v := range testShakes {
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for _, kat := range katSet.Kats[algo] {
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N, err := hex.DecodeString(kat.N)
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if err != nil {
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t.Errorf("error decoding KAT: %s", err)
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}
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S, err := hex.DecodeString(kat.S)
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if err != nil {
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t.Errorf("error decoding KAT: %s", err)
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}
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d := v.constructor(N, S)
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in, err := hex.DecodeString(kat.Message)
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if err != nil {
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t.Errorf("error decoding KAT: %s", err)
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}
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d.Write(in[:kat.Length/8])
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out := make([]byte, len(kat.Digest)/2)
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d.Read(out)
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got := strings.ToUpper(hex.EncodeToString(out))
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if got != kat.Digest {
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t.Errorf("function=%s, implementation=%s, length=%d N:%s\n S:%s\nmessage:\n %s \ngot:\n %s\nwanted:\n %s",
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algo, impl, kat.Length, kat.N, kat.S, kat.Message, got, kat.Digest)
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t.Logf("wanted %+v", kat)
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t.FailNow()
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}
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continue
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}
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}
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})
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}
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// TestKeccak does a basic test of the non-standardized Keccak hash functions.
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func TestKeccak(t *testing.T) {
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tests := []struct {
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fn func() hash.Hash
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data []byte
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want string
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}{
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{
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NewLegacyKeccak256,
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[]byte("abc"),
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"4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45",
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},
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}
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for _, u := range tests {
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h := u.fn()
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h.Write(u.data)
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got := h.Sum(nil)
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want := decodeHex(u.want)
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if !bytes.Equal(got, want) {
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t.Errorf("unexpected hash for size %d: got '%x' want '%s'", h.Size()*8, got, u.want)
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}
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}
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}
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// TestUnalignedWrite tests that writing data in an arbitrary pattern with
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// small input buffers.
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func TestUnalignedWrite(t *testing.T) {
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testUnalignedAndGeneric(t, func(impl string) {
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buf := sequentialBytes(0x10000)
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for alg, df := range testDigests {
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d := df()
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d.Reset()
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d.Write(buf)
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want := d.Sum(nil)
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d.Reset()
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for i := 0; i < len(buf); {
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// Cycle through offsets which make a 137 byte sequence.
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// Because 137 is prime this sequence should exercise all corner cases.
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offsets := [17]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 1}
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for _, j := range offsets {
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if v := len(buf) - i; v < j {
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j = v
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}
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d.Write(buf[i : i+j])
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i += j
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}
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}
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got := d.Sum(nil)
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if !bytes.Equal(got, want) {
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t.Errorf("Unaligned writes, implementation=%s, alg=%s\ngot %q, want %q", impl, alg, got, want)
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}
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}
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// Same for SHAKE
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for alg, df := range testShakes {
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want := make([]byte, 16)
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got := make([]byte, 16)
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d := df.constructor([]byte(df.defAlgoName), []byte(df.defCustomStr))
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d.Reset()
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d.Write(buf)
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d.Read(want)
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d.Reset()
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for i := 0; i < len(buf); {
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// Cycle through offsets which make a 137 byte sequence.
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// Because 137 is prime this sequence should exercise all corner cases.
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offsets := [17]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 1}
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for _, j := range offsets {
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if v := len(buf) - i; v < j {
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j = v
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}
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d.Write(buf[i : i+j])
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i += j
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}
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}
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d.Read(got)
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if !bytes.Equal(got, want) {
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t.Errorf("Unaligned writes, implementation=%s, alg=%s\ngot %q, want %q", impl, alg, got, want)
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}
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}
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})
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}
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// TestAppend checks that appending works when reallocation is necessary.
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func TestAppend(t *testing.T) {
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testUnalignedAndGeneric(t, func(impl string) {
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d := New224()
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for capacity := 2; capacity <= 66; capacity += 64 {
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// The first time around the loop, Sum will have to reallocate.
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// The second time, it will not.
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buf := make([]byte, 2, capacity)
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d.Reset()
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d.Write([]byte{0xcc})
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buf = d.Sum(buf)
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expected := "0000DF70ADC49B2E76EEE3A6931B93FA41841C3AF2CDF5B32A18B5478C39"
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if got := strings.ToUpper(hex.EncodeToString(buf)); got != expected {
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t.Errorf("got %s, want %s", got, expected)
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}
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}
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})
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}
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// TestAppendNoRealloc tests that appending works when no reallocation is necessary.
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func TestAppendNoRealloc(t *testing.T) {
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testUnalignedAndGeneric(t, func(impl string) {
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buf := make([]byte, 1, 200)
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d := New224()
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d.Write([]byte{0xcc})
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buf = d.Sum(buf)
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expected := "00DF70ADC49B2E76EEE3A6931B93FA41841C3AF2CDF5B32A18B5478C39"
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if got := strings.ToUpper(hex.EncodeToString(buf)); got != expected {
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t.Errorf("%s: got %s, want %s", impl, got, expected)
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}
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})
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}
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// TestSqueezing checks that squeezing the full output a single time produces
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// the same output as repeatedly squeezing the instance.
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func TestSqueezing(t *testing.T) {
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testUnalignedAndGeneric(t, func(impl string) {
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for algo, v := range testShakes {
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d0 := v.constructor([]byte(v.defAlgoName), []byte(v.defCustomStr))
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d0.Write([]byte(testString))
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ref := make([]byte, 32)
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d0.Read(ref)
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d1 := v.constructor([]byte(v.defAlgoName), []byte(v.defCustomStr))
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d1.Write([]byte(testString))
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var multiple []byte
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for range ref {
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one := make([]byte, 1)
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d1.Read(one)
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multiple = append(multiple, one...)
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}
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if !bytes.Equal(ref, multiple) {
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t.Errorf("%s (%s): squeezing %d bytes one at a time failed", algo, impl, len(ref))
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}
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}
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})
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}
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// sequentialBytes produces a buffer of size consecutive bytes 0x00, 0x01, ..., used for testing.
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func sequentialBytes(size int) []byte {
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result := make([]byte, size)
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for i := range result {
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result[i] = byte(i)
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}
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return result
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}
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func TestReset(t *testing.T) {
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out1 := make([]byte, 32)
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out2 := make([]byte, 32)
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for _, v := range testShakes {
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// Calculate hash for the first time
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c := v.constructor(nil, []byte{0x99, 0x98})
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c.Write(sequentialBytes(0x100))
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c.Read(out1)
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// Calculate hash again
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c.Reset()
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c.Write(sequentialBytes(0x100))
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c.Read(out2)
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if !bytes.Equal(out1, out2) {
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t.Error("\nExpected:\n", out1, "\ngot:\n", out2)
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}
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}
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}
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func TestClone(t *testing.T) {
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out1 := make([]byte, 16)
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out2 := make([]byte, 16)
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in := sequentialBytes(0x100)
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for _, v := range testShakes {
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h1 := v.constructor(nil, []byte{0x01})
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h1.Write([]byte{0x01})
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h2 := h1.Clone()
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h1.Write(in)
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h1.Read(out1)
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h2.Write(in)
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h2.Read(out2)
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if !bytes.Equal(out1, out2) {
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t.Error("\nExpected:\n", hex.EncodeToString(out1), "\ngot:\n", hex.EncodeToString(out2))
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}
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}
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}
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// BenchmarkPermutationFunction measures the speed of the permutation function
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// with no input data.
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func BenchmarkPermutationFunction(b *testing.B) {
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b.SetBytes(int64(200))
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var lanes [25]uint64
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for i := 0; i < b.N; i++ {
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keccakF1600(&lanes)
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}
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}
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// benchmarkHash tests the speed to hash num buffers of buflen each.
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func benchmarkHash(b *testing.B, h hash.Hash, size, num int) {
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b.StopTimer()
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h.Reset()
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data := sequentialBytes(size)
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b.SetBytes(int64(size * num))
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b.StartTimer()
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var state []byte
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for i := 0; i < b.N; i++ {
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for j := 0; j < num; j++ {
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h.Write(data)
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}
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state = h.Sum(state[:0])
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}
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b.StopTimer()
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h.Reset()
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}
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// benchmarkShake is specialized to the Shake instances, which don't
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// require a copy on reading output.
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func benchmarkShake(b *testing.B, h ShakeHash, size, num int) {
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b.StopTimer()
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h.Reset()
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data := sequentialBytes(size)
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d := make([]byte, 32)
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b.SetBytes(int64(size * num))
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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h.Reset()
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for j := 0; j < num; j++ {
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h.Write(data)
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}
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h.Read(d)
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}
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}
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func BenchmarkSha3_512_MTU(b *testing.B) { benchmarkHash(b, New512(), 1350, 1) }
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func BenchmarkSha3_384_MTU(b *testing.B) { benchmarkHash(b, New384(), 1350, 1) }
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func BenchmarkSha3_256_MTU(b *testing.B) { benchmarkHash(b, New256(), 1350, 1) }
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func BenchmarkSha3_224_MTU(b *testing.B) { benchmarkHash(b, New224(), 1350, 1) }
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func BenchmarkShake128_MTU(b *testing.B) { benchmarkShake(b, NewShake128(), 1350, 1) }
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func BenchmarkShake256_MTU(b *testing.B) { benchmarkShake(b, NewShake256(), 1350, 1) }
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func BenchmarkShake256_16x(b *testing.B) { benchmarkShake(b, NewShake256(), 16, 1024) }
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func BenchmarkShake256_1MiB(b *testing.B) { benchmarkShake(b, NewShake256(), 1024, 1024) }
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func BenchmarkSha3_512_1MiB(b *testing.B) { benchmarkHash(b, New512(), 1024, 1024) }
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func Example_sum() {
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buf := []byte("some data to hash")
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// A hash needs to be 64 bytes long to have 256-bit collision resistance.
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h := make([]byte, 64)
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// Compute a 64-byte hash of buf and put it in h.
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ShakeSum256(h, buf)
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fmt.Printf("%x\n", h)
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// Output: 0f65fe41fc353e52c55667bb9e2b27bfcc8476f2c413e9437d272ee3194a4e3146d05ec04a25d16b8f577c19b82d16b1424c3e022e783d2b4da98de3658d363d
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}
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func Example_mac() {
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k := []byte("this is a secret key; you should generate a strong random key that's at least 32 bytes long")
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buf := []byte("and this is some data to authenticate")
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// A MAC with 32 bytes of output has 256-bit security strength -- if you use at least a 32-byte-long key.
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h := make([]byte, 32)
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d := NewShake256()
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// Write the key into the hash.
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d.Write(k)
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// Now write the data.
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d.Write(buf)
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// Read 32 bytes of output from the hash into h.
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d.Read(h)
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fmt.Printf("%x\n", h)
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// Output: 78de2974bd2711d5549ffd32b753ef0f5fa80a0db2556db60f0987eb8a9218ff
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}
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func ExampleCShake256() {
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out := make([]byte, 32)
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msg := []byte("The quick brown fox jumps over the lazy dog")
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// Example 1: Simple cshake
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c1 := NewCShake256([]byte("NAME"), []byte("Partition1"))
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c1.Write(msg)
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c1.Read(out)
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fmt.Println(hex.EncodeToString(out))
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// Example 2: Different customization string produces different digest
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c1 = NewCShake256([]byte("NAME"), []byte("Partition2"))
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c1.Write(msg)
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c1.Read(out)
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fmt.Println(hex.EncodeToString(out))
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// Example 3: Different output length produces different digest
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out = make([]byte, 64)
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c1 = NewCShake256([]byte("NAME"), []byte("Partition1"))
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c1.Write(msg)
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c1.Read(out)
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fmt.Println(hex.EncodeToString(out))
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// Example 4: Next read produces different result
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c1.Read(out)
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fmt.Println(hex.EncodeToString(out))
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// Output:
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//a90a4c6ca9af2156eba43dc8398279e6b60dcd56fb21837afe6c308fd4ceb05b
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//a8db03e71f3e4da5c4eee9d28333cdd355f51cef3c567e59be5beb4ecdbb28f0
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//a90a4c6ca9af2156eba43dc8398279e6b60dcd56fb21837afe6c308fd4ceb05b9dd98c6ee866ca7dc5a39d53e960f400bcd5a19c8a2d6ec6459f63696543a0d8
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//85e73a72228d08b46515553ca3a29d47df3047e5d84b12d6c2c63e579f4fd1105716b7838e92e981863907f434bfd4443c9e56ea09da998d2f9b47db71988109
|
|
}
|