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91 lines
2.3 KiB
91 lines
2.3 KiB
'use strict';
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const assert = require('assert');
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const HmacDRBG = require('../');
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const hash = require('hash.js');
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describe('Hmac_DRBG', () => {
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it('should support hmac-drbg-sha256', () => {
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function doDrbg(opt) {
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const drbg = HmacDRBG({
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hash: hash.sha256,
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entropy: opt.entropy,
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entropyEnc: 'utf8',
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nonce: opt.nonce,
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nonceEnc: 'utf8',
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pers: opt.pers,
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persEnc: 'utf8'
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});
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return drbg.generate(opt.size, 'hex');
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}
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const test = [
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{
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entropy: 'totally random0123456789',
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nonce: 'secret nonce',
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pers: 'my drbg',
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size: 32,
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res: '018ec5f8e08c41e5ac974eb129ac297c5388ee1864324fa13d9b15cf98d9a157'
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},
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{
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entropy: 'totally random0123456789',
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nonce: 'secret nonce',
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pers: null,
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size: 32,
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res: 'ed5d61ecf0ef38258e62f03bbb49f19f2cd07ba5145a840d83b134d5963b3633'
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}
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];
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for (let i = 0; i < test.length; i++)
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assert.equal(doDrbg(test[i]), test[i].res);
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});
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describe('NIST vector', function() {
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require('./fixtures/hmac-drbg-nist.json').forEach(function (opt) {
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it('should not fail at ' + opt.name, function() {
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const drbg = HmacDRBG({
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hash: hash.sha256,
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entropy: opt.entropy,
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nonce: opt.nonce,
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pers: opt.pers
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});
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let last;
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for (let i = 0; i < opt.add.length; i++) {
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let add = opt.add[i];
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last = drbg.generate(opt.expected.length / 2, 'hex', add);
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}
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assert.equal(last, opt.expected);
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});
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});
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});
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describe('reseeding', function() {
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it('should reseed', function() {
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const entropy = 'totally random string with many chars that I typed ' +
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'in agony';
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const nonce = 'nonce';
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const pers = 'pers';
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const original = HmacDRBG({
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hash: hash.sha256,
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entropy,
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nonce,
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pers
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});
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const reseeded = HmacDRBG({
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hash: hash.sha256,
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entropy,
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nonce,
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pers
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});
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assert.strictEqual(original.generate(32, 'hex'),
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reseeded.generate(32, 'hex'));
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reseeded.reseed('another absolutely random string');
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assert.notEqual(original.generate(32, 'hex'),
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reseeded.generate(32, 'hex'));
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});
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});
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});
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