YbfgPebL

1/*jslint
2    browser: true,
3    devel: true
4*/
5(function () {
6    'use strict';
7    var algoEncrypt, plainText, secretKey;
8    function strToArrayBuffer(str) {
9        var buf, bufView, ii, strLen;
10        buf = new window.ArrayBuffer(str.length * 2);
11        bufView = new window.Uint16Array(buf);
12        for (ii = 0, strLen = str.length; ii < strLen; ii += 1) {
13            bufView[ii] = str.charCodeAt(ii);
14        }
15        return buf;
16    }
17    function arrayBufferToString(buf) {
18        return String.fromCharCode.apply(null, new window.Uint16Array(buf));
19    }
20    algoEncrypt = {
21        name: 'AES-CBC',
22        iv: window.crypto.getRandomValues(new window.Uint8Array(16)),
23        tagLength: 128
24    };
25    plainText = 'This is some plaintext';
26    console.log('Plain Text: ' + plainText);
27    window.crypto.subtle.generateKey({
28        name: 'AES-CBC',
29        length: 256
30    }, false, [
31        'encrypt',
32        'decrypt'
33    ]).then(function (key) {
34        secretKey = key;
35        return window.crypto.subtle.encrypt(algoEncrypt, key, strToArrayBuffer(plainText));
36    }).then(function (cipherText) {
37        console.log('Cipher Text: ' + arrayBufferToString(cipherText));
38        return window.crypto.subtle.decrypt(algoEncrypt, secretKey, cipherText);
39    }).then(function (plainText) {
40        console.log('Plain Text: ' + arrayBufferToString(plainText));
41    }).catch(function (err) {
42        console.log('Error: ' + err.message);
43    });
44}());