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test: add AES-256 padding crypto test

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bnoordhuis committed Sep 11, 2012
1 parent 5d9968f commit 98d53ac51ea3464754155e50e55106bd30aed193
Showing with 67 additions and 0 deletions.
  1. +67 −0 test/simple/test-crypto-padding-aes256.js
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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var common = require('../common');
var assert = require('assert');

try {
var crypto = require('crypto');
} catch (e) {
console.log('Not compiled with OpenSSL support.');
process.exit();
}

function aes256(decipherFinal) {
var iv = new Buffer('00000000000000000000000000000000', 'hex');
var key = new Buffer('0123456789abcdef0123456789abcdef' +
'0123456789abcdef0123456789abcdef', 'hex');

function encrypt(val, pad) {
var c = crypto.createCipheriv('aes256', key, iv);
c.setAutoPadding(pad);
return c.update(val, 'utf8') + c.final('binary');
}

function decrypt(val, pad) {
var c = crypto.createDecipheriv('aes256', key, iv);
c.setAutoPadding(pad);
return c.update(val, 'binary') + c[decipherFinal]('utf8');
}

// echo 0123456789abcdef0123456789abcdef \
// | openssl enc -e -aes256 -nopad -K <key> -iv <iv> \
// | openssl enc -d -aes256 -nopad -K <key> -iv <iv>
var plaintext = '0123456789abcdef0123456789abcdef'; // multiple of block size
var encrypted = encrypt(plaintext, false);
var decrypted = decrypt(encrypted, false);
assert.equal(decrypted, plaintext);

// echo 0123456789abcdef0123456789abcde \
// | openssl enc -e -aes256 -K <key> -iv <iv> \
// | openssl enc -d -aes256 -K <key> -iv <iv>
plaintext = '0123456789abcdef0123456789abcde'; // not a multiple
encrypted = encrypt(plaintext, true);
decrypted = decrypt(encrypted, true);
assert.equal(decrypted, plaintext);
}

aes256('final');
aes256('finaltol');

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