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65 lines
1.4 KiB
65 lines
1.4 KiB
/* eslint-disable object-shorthand */
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import {pad, unpad} from '../src/pkcs7.js';
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import QUnit from 'qunit';
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const pkcs7 = {pad, unpad};
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QUnit.module('pkcs7');
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QUnit.test('pads empty buffers', function(assert) {
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assert.expect(1);
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const result = pkcs7.unpad(pkcs7.pad(new Uint8Array([])));
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assert.deepEqual(
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new Uint8Array(result, result.byteOffset, result.byteLength),
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new Uint8Array(0),
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'accepts an empty buffer'
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);
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});
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QUnit.test('pads non-empty buffers', function(assert) {
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let i = 16;
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assert.expect(i * 3);
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while (i--) {
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// build the test buffer
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const buffer = new Uint8Array(i + 1);
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let result;
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result = pkcs7.pad(buffer);
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assert.equal(result.length % 16, 0, 'padded length is a multiple of 16');
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assert.equal(result.slice(-1)[0], 16 - ((i + 1) % 16), 'appended the correct value');
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result = pkcs7.unpad(result);
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assert.deepEqual(
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new Uint8Array(result, result.byteOffset, result.byteLength),
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buffer,
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'padding is reversible'
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);
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}
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});
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QUnit.test('works on buffers greater than sixteen bytes', function(assert) {
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const buffer = new Uint8Array(16 * 3 + 9);
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assert.expect(2);
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assert.equal(
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pkcs7.pad(buffer).length - buffer.length,
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16 - 9,
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'adds the correct amount of padding'
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);
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const result = pkcs7.unpad(pkcs7.pad(buffer));
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assert.deepEqual(
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new Uint8Array(result, result.byteOffset, result.byteLength),
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buffer,
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'is reversible'
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);
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});
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