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4.7 KiB

package hkdfchacha20poly1305
import (
"bytes"
cr "crypto/rand"
"encoding/hex"
mr "math/rand"
"testing"
"github.com/stretchr/testify/assert"
)
// Test that a test vector we generated is valid. (Ensures backwards
// compatibility)
func TestVector(t *testing.T) {
key, _ := hex.DecodeString("56f8de45d3c294c7675bcaf457bdd4b71c380b9b2408ce9412b348d0f08b69ee")
aead, err := New(key[:])
if err != nil {
t.Fatal(err)
}
cts := []string{"e20a8bf42c535ac30125cfc52031577f0b",
"657695b37ba30f67b25860d90a6f1d00d8",
"e9aa6f3b7f625d957fd50f05bcdf20d014",
"8a00b3b5a6014e0d2033bebc5935086245",
"aadd74867b923879e6866ea9e03c009039",
"fc59773c2c864ee3b4cc971876b3c7bed4",
"caec14e3a9a52ce1a2682c6737defa4752",
"0b89511ffe490d2049d6950494ee51f919",
"7de854ea71f43ca35167a07566c769083d",
"cd477327f4ea4765c71e311c5fec1edbfb"}
for i := 0; i < 10; i++ {
ct, _ := hex.DecodeString(cts[i])
byteArr := []byte{byte(i)}
nonce := make([]byte, 24)
nonce[0] = byteArr[0]
// Test that we get the expected plaintext on open
plaintext, err := aead.Open(nil, nonce, ct, byteArr)
if err != nil {
t.Errorf("%dth Open failed", i)
continue
}
assert.Equal(t, byteArr, plaintext)
// Test that sealing yields the expected ciphertext
ciphertext := aead.Seal(nil, nonce, plaintext, byteArr)
assert.Equal(t, ct, ciphertext)
}
}
// The following test is taken from
// https://github.com/golang/crypto/blob/master/chacha20poly1305/chacha20poly1305_test.go#L69
// It requires the below copyright notice, where "this source code" refers to the following function.
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found at the bottom of this file.
func TestRandom(t *testing.T) {
// Some random tests to verify Open(Seal) == Plaintext
for i := 0; i < 256; i++ {
var nonce [24]byte
var key [32]byte
al := mr.Intn(128)
pl := mr.Intn(16384)
ad := make([]byte, al)
plaintext := make([]byte, pl)
cr.Read(key[:])
cr.Read(nonce[:])
cr.Read(ad)
cr.Read(plaintext)
aead, err := New(key[:])
if err != nil {
t.Fatal(err)
}
ct := aead.Seal(nil, nonce[:], plaintext, ad)
plaintext2, err := aead.Open(nil, nonce[:], ct, ad)
if err != nil {
t.Errorf("Random #%d: Open failed", i)
continue
}
if !bytes.Equal(plaintext, plaintext2) {
t.Errorf("Random #%d: plaintext's don't match: got %x vs %x", i, plaintext2, plaintext)
continue
}
if len(ad) > 0 {
alterAdIdx := mr.Intn(len(ad))
ad[alterAdIdx] ^= 0x80
if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
t.Errorf("Random #%d: Open was successful after altering additional data", i)
}
ad[alterAdIdx] ^= 0x80
}
alterNonceIdx := mr.Intn(aead.NonceSize())
nonce[alterNonceIdx] ^= 0x80
if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
t.Errorf("Random #%d: Open was successful after altering nonce", i)
}
nonce[alterNonceIdx] ^= 0x80
alterCtIdx := mr.Intn(len(ct))
ct[alterCtIdx] ^= 0x80
if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
t.Errorf("Random #%d: Open was successful after altering ciphertext", i)
}
ct[alterCtIdx] ^= 0x80
}
}
// AFOREMENTIONED LICENCE
// Copyright (c) 2009 The Go Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.