40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
const openpgp = typeof window !== 'undefined' && window.openpgp ? window.openpgp : require('../..');
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const expect = require('chai').expect;
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module.exports = () => describe('PKCS5 padding', function() {
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function repeat(pattern, count) {
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let result = '';
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for (let k = 0; k < count; ++k) {
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result += pattern;
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}
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return result;
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}
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const pkcs5 = openpgp.crypto.pkcs5;
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it('Add padding', function () {
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let s = '';
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while (s.length < 16) {
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const r = pkcs5.encode(s);
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// 0..7 -> 8, 8..15 -> 16
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const l = Math.ceil((s.length + 1) / 8) * 8;
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const c = l - s.length;
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expect(r.length).to.equal(l);
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expect(c).is.at.least(1).is.at.most(8);
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expect(r.substr(-1)).to.equal(String.fromCharCode(c));
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s += ' ';
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}
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});
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it('Remove padding', function () {
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for (let k = 1; k <= 8; ++k) {
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const s = repeat(' ', 8 - k);
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const r = s + repeat(String.fromCharCode(k), k);
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const t = pkcs5.decode(r);
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expect(t).to.equal(s);
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}
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});
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it('Invalid padding', function () {
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expect(function () { pkcs5.decode(' '); }).to.throw(Error, /Invalid padding/);
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expect(function () { pkcs5.decode(''); }).to.throw(Error, /Invalid padding/);
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});
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});
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