�PNG  IHDR��;���IDATx��ܻn�0���K�� �)(�pA��� ���7�LeG{�� �§㻢|��ذaÆ 6lذaÆ 6lذaÆ 6lom��$^�y���ذag�5bÆ 6lذaÆ 6lذa{���� 6lذaÆ �`����}H�Fkm�,�m����Ӫ���ô�ô!� �x�|'ܢ˟;�E:���9�&ᶒ�}�{�v]�n&�6� �h��_��t�ڠ͵-ҫ���Z;��Z$�.�P���k�ž)�!��o���>}l�eQfJ�T��u і���چ��\��X=8��Rن4`Vw�l�>����n�G�^��i�s��"ms�$�u��i��?w�bs[m�6�K4���O���.�4��%����/����b�C%��t ��M�ז� �-l�G6�mrz2���s�%�9��s@���-�k�9�=���)������k�B5����\��+͂�Zsٲ ��Rn��~G���R���C����� �wIcI��n7jJ���hۛNCS|���j0��8y�iHKֶۛ�k�Ɉ+;Sz������L/��F�*\��Ԕ�#"5��m�2��[S��������=�g��n�a�P�e�ғ�L�� lذaÆ 6l�^k��̱aÆ 6lذaÆ 6lذa;���� �_��ذaÆ 6lذaÆ 6lذaÆ ���R���IEND�B` 'use strict'; const assert = require('assert'); const HmacDRBG = require('../'); const hash = require('hash.js'); describe('Hmac_DRBG', () => { it('should support hmac-drbg-sha256', () => { function doDrbg(opt) { const drbg = HmacDRBG({ hash: hash.sha256, entropy: opt.entropy, entropyEnc: 'utf8', nonce: opt.nonce, nonceEnc: 'utf8', pers: opt.pers, persEnc: 'utf8' }); return drbg.generate(opt.size, 'hex'); } const test = [ { entropy: 'totally random0123456789', nonce: 'secret nonce', pers: 'my drbg', size: 32, res: '018ec5f8e08c41e5ac974eb129ac297c5388ee1864324fa13d9b15cf98d9a157' }, { entropy: 'totally random0123456789', nonce: 'secret nonce', pers: null, size: 32, res: 'ed5d61ecf0ef38258e62f03bbb49f19f2cd07ba5145a840d83b134d5963b3633' } ]; for (let i = 0; i < test.length; i++) assert.equal(doDrbg(test[i]), test[i].res); }); describe('NIST vector', function() { require('./fixtures/hmac-drbg-nist.json').forEach(function (opt) { it('should not fail at ' + opt.name, function() { const drbg = HmacDRBG({ hash: hash.sha256, entropy: opt.entropy, nonce: opt.nonce, pers: opt.pers }); let last; for (let i = 0; i < opt.add.length; i++) { let add = opt.add[i]; last = drbg.generate(opt.expected.length / 2, 'hex', add); } assert.equal(last, opt.expected); }); }); }); describe('reseeding', function() { it('should reseed', function() { const entropy = 'totally random string with many chars that I typed ' + 'in agony'; const nonce = 'nonce'; const pers = 'pers'; const original = HmacDRBG({ hash: hash.sha256, entropy, nonce, pers }); const reseeded = HmacDRBG({ hash: hash.sha256, entropy, nonce, pers }); assert.strictEqual(original.generate(32, 'hex'), reseeded.generate(32, 'hex')); reseeded.reseed('another absolutely random string'); assert.notEqual(original.generate(32, 'hex'), reseeded.generate(32, 'hex')); }); }); });