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// Copyright 2012 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Unit tests for CBC mode for block ciphers.
*
* @author nnaze@google.com (Nathan Naze)
*/
goog.provide('goog.crypt.CbcTest');
goog.require('goog.crypt.Aes');
goog.require('goog.crypt.Cbc');
goog.require('goog.crypt');
goog.require('goog.testing.jsunit');
goog.setTestOnly('goog.crypt.CbcTest');
function stringToBytes(s) {
var bytes = new Array(s.length);
for (var i = 0; i < s.length; ++i)
bytes[i] = s.charCodeAt(i) & 255;
return bytes;
}
function runCbcAesTest(keyBytes, initialVectorBytes, plainTextBytes,
cipherTextBytes) {
var aes = new goog.crypt.Aes(keyBytes);
var cbc = new goog.crypt.Cbc(aes);
var encryptedBytes = cbc.encrypt(plainTextBytes, initialVectorBytes);
assertEquals('Encrypted bytes should match cipher text.',
goog.crypt.byteArrayToHex(cipherTextBytes),
goog.crypt.byteArrayToHex(encryptedBytes));
var decryptedBytes = cbc.decrypt(cipherTextBytes, initialVectorBytes);
assertEquals('Decrypted bytes should match plain text.',
goog.crypt.byteArrayToHex(plainTextBytes),
goog.crypt.byteArrayToHex(decryptedBytes));
}
function testAesCbcCipherAlgorithm() {
// Test values from http://www.ietf.org/rfc/rfc3602.txt
// Case #1
runCbcAesTest(
goog.crypt.hexToByteArray('06a9214036b8a15b512e03d534120006'),
goog.crypt.hexToByteArray('3dafba429d9eb430b422da802c9fac41'),
stringToBytes('Single block msg'),
goog.crypt.hexToByteArray('e353779c1079aeb82708942dbe77181a'));
// Case #2
runCbcAesTest(
goog.crypt.hexToByteArray('c286696d887c9aa0611bbb3e2025a45a'),
goog.crypt.hexToByteArray('562e17996d093d28ddb3ba695a2e6f58'),
goog.crypt.hexToByteArray(
'000102030405060708090a0b0c0d0e0f' +
'101112131415161718191a1b1c1d1e1f'),
goog.crypt.hexToByteArray(
'd296cd94c2cccf8a3a863028b5e1dc0a' +
'7586602d253cfff91b8266bea6d61ab1'));
// Case #3
runCbcAesTest(
goog.crypt.hexToByteArray('6c3ea0477630ce21a2ce334aa746c2cd'),
goog.crypt.hexToByteArray('c782dc4c098c66cbd9cd27d825682c81'),
stringToBytes('This is a 48-byte message (exactly 3 AES blocks)'),
goog.crypt.hexToByteArray(
'd0a02b3836451753d493665d33f0e886' +
'2dea54cdb293abc7506939276772f8d5' +
'021c19216bad525c8579695d83ba2684'));
// Case #4
runCbcAesTest(
goog.crypt.hexToByteArray('56e47a38c5598974bc46903dba290349'),
goog.crypt.hexToByteArray('8ce82eefbea0da3c44699ed7db51b7d9'),
goog.crypt.hexToByteArray(
'a0a1a2a3a4a5a6a7a8a9aaabacadaeaf' +
'b0b1b2b3b4b5b6b7b8b9babbbcbdbebf' +
'c0c1c2c3c4c5c6c7c8c9cacbcccdcecf' +
'd0d1d2d3d4d5d6d7d8d9dadbdcdddedf'),
goog.crypt.hexToByteArray(
'c30e32ffedc0774e6aff6af0869f71aa' +
'0f3af07a9a31a9c684db207eb0ef8e4e' +
'35907aa632c3ffdf868bb7b29d3d46ad' +
'83ce9f9a102ee99d49a53e87f4c3da55'));
}
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