'use strict';
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var assert = require('assert');
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var crypto = require('crypto');
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var Buffer = require('buffer').Buffer;
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var des = require('../');
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var fixtures = require('./fixtures');
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var bin = fixtures.bin;
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describe('DES', function() {
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describe('Key Derivation', function() {
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it('should derive proper keys', function() {
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var d = des.DES.create({
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type: 'encrypt',
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key: [ 0x13, 0x34, 0x57, 0x79, 0x9B, 0xBC, 0xDF, 0xF1 ]
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});
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var expected = [
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'000110 110000 001011 101111',
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'111111 000111 000001 110010',
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'011110 011010 111011 011001',
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'110110 111100 100111 100101',
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'010101 011111 110010 001010',
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'010000 101100 111110 011001',
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'011100 101010 110111 010110',
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'110110 110011 010100 011101',
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'011111 001110 110000 000111',
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'111010 110101 001110 101000',
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'011000 111010 010100 111110',
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'010100 000111 101100 101111',
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'111011 001000 010010 110111',
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'111101 100001 100010 111100',
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'111101 111000 101000 111010',
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'110000 010011 101111 111011',
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'111000 001101 101111 101011',
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'111011 011110 011110 000001',
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'101100 011111 001101 000111',
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'101110 100100 011001 001111',
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'001000 010101 111111 010011',
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'110111 101101 001110 000110',
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'011101 010111 000111 110101',
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'100101 000110 011111 101001',
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'100101 111100 010111 010001',
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'111110 101011 101001 000001',
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'010111 110100 001110 110111',
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'111100 101110 011100 111010',
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'101111 111001 000110 001101',
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'001111 010011 111100 001010',
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'110010 110011 110110 001011',
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'000011 100001 011111 110101'
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];
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expected = expected.map(fixtures.bin);
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assert.deepEqual(d._desState.keys, expected);
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});
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});
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describe('encryption/decryption', function() {
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var vectors = [
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{
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key: '133457799bbcdff1',
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input: '0123456789abcdef'
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},
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{
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key: '0000000000000000',
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input: '0000000000000000'
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},
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{
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key: 'a3a3a3a3b3b3b3b3',
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input: 'cccccccccccccccc'
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},
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{
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key: 'deadbeefabbadead',
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input: '0102030405060708090a'
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},
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{
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key: 'aabbccddeeff0011',
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input: '0102030405060708090a0102030405060708090a0102030405060708090a' +
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'0102030405060708090a0102030405060607080a0102030405060708090a'
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}
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];
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vectors.forEach(function(vec, i) {
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it('should encrypt vector ' + i, function() {
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var key = new Buffer(vec.key, 'hex');
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var input = new Buffer(vec.input, 'hex');
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var enc = des.DES.create({
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type: 'encrypt',
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key: key
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});
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var dec = des.DES.create({
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type: 'decrypt',
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key: key
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});
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var out = new Buffer(enc.update(input).concat(enc.final()));
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var cipher = crypto.createCipheriv('des-ecb', key, new Buffer(0));
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var expected = Buffer.concat([ cipher.update(input), cipher.final() ]);
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assert.deepEqual(out, expected);
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assert.deepEqual(new Buffer(dec.update(out).concat(dec.final())),
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input);
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});
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});
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it('should buffer during encryption/decryption', function() {
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var key = new Buffer('0102030405060708', 'hex');
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var chunk = new Buffer('01020304050607', 'hex');
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var count = 257;
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var expected = new Buffer(
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new Array(count + 1).join('01020304050607'), 'hex');
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var enc = des.DES.create({
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type: 'encrypt',
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key: key
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});
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var cipher = [];
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for (var i = 0; i < count; i++)
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cipher = cipher.concat(enc.update(chunk));
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cipher = cipher.concat(enc.final());
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var dec = des.DES.create({
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type: 'decrypt',
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key: key
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});
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var out = [];
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for (var i = 0; i < count; i++)
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out = out.concat(dec.update(cipher.slice(i * 7, (i + 1) * 7)));
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out = out.concat(dec.final(cipher.slice(i * 7)));
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out = new Buffer(out);
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assert.deepEqual(out, expected);
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});
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});
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});
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