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113 lines
3.7 KiB
113 lines
3.7 KiB
package xchacha20poly1305
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import (
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"bytes"
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cr "crypto/rand"
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mr "math/rand"
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"testing"
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)
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// The following test is taken from
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// https://github.com/golang/crypto/blob/master/chacha20poly1305/chacha20poly1305_test.go#L69
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// It requires the below copyright notice, where "this source code" refers to the following function.
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// 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 at the bottom of this file.
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func TestRandom(t *testing.T) {
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// Some random tests to verify Open(Seal) == Plaintext
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for i := 0; i < 256; i++ {
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var nonce [24]byte
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var key [32]byte
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al := mr.Intn(128)
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pl := mr.Intn(16384)
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ad := make([]byte, al)
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plaintext := make([]byte, pl)
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_, err := cr.Read(key[:])
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if err != nil {
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t.Errorf("error on read: %w", err)
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}
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_, err = cr.Read(nonce[:])
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if err != nil {
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t.Errorf("error on read: %w", err)
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}
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_, err = cr.Read(ad)
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if err != nil {
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t.Errorf("error on read: %w", err)
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}
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_, err = cr.Read(plaintext)
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if err != nil {
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t.Errorf("error on read: %w", err)
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}
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aead, err := New(key[:])
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if err != nil {
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t.Fatal(err)
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}
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ct := aead.Seal(nil, nonce[:], plaintext, ad)
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plaintext2, err := aead.Open(nil, nonce[:], ct, ad)
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if err != nil {
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t.Errorf("random #%d: Open failed", i)
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continue
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}
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if !bytes.Equal(plaintext, plaintext2) {
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t.Errorf("random #%d: plaintext's don't match: got %x vs %x", i, plaintext2, plaintext)
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continue
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}
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if len(ad) > 0 {
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alterAdIdx := mr.Intn(len(ad))
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ad[alterAdIdx] ^= 0x80
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if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
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t.Errorf("random #%d: Open was successful after altering additional data", i)
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}
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ad[alterAdIdx] ^= 0x80
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}
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alterNonceIdx := mr.Intn(aead.NonceSize())
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nonce[alterNonceIdx] ^= 0x80
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if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
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t.Errorf("random #%d: Open was successful after altering nonce", i)
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}
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nonce[alterNonceIdx] ^= 0x80
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alterCtIdx := mr.Intn(len(ct))
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ct[alterCtIdx] ^= 0x80
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if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
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t.Errorf("random #%d: Open was successful after altering ciphertext", i)
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}
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ct[alterCtIdx] ^= 0x80
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}
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}
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// AFOREMENTIONED LICENCE
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// Copyright (c) 2009 The Go Authors. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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