37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
'use strict';
|
|
var sjcl = require('../sjcl');
|
|
var ECIES = require('../common/ECIES');
|
|
|
|
ECIES.symmetricEncrypt = function(key, iv, message) {
|
|
var skey = sjcl.codec.hex.toBits(key.toString('hex'));
|
|
var siv = sjcl.codec.hex.toBits(iv.toString('hex'));
|
|
var smessage = sjcl.codec.hex.toBits(message.toString('hex'));
|
|
|
|
sjcl.beware["CBC mode is dangerous because it doesn't protect message integrity."]();
|
|
|
|
var cipher = new sjcl.cipher.aes(skey);
|
|
var encrypted = sjcl.mode.cbc.encrypt(cipher, smessage, siv);
|
|
var encbuf = new Buffer(sjcl.codec.hex.fromBits(encrypted), 'hex');
|
|
var r = Buffer.concat([iv, encbuf]);
|
|
|
|
return r;
|
|
};
|
|
|
|
ECIES.symmetricDecrypt = function(key, encrypted) {
|
|
var skey = sjcl.codec.hex.toBits(key.toString('hex'));
|
|
var iv = encrypted.slice(0, 16);
|
|
var todecrypt = encrypted.slice(16, encrypted.length);
|
|
|
|
sjcl.beware["CBC mode is dangerous because it doesn't protect message integrity."]();
|
|
|
|
var encbits = sjcl.codec.hex.toBits(todecrypt.toString('hex'));
|
|
var ivbits = sjcl.codec.hex.toBits(iv.toString('hex'));
|
|
var cipher = new sjcl.cipher.aes(skey);
|
|
var decrypted = sjcl.mode.cbc.decrypt(cipher, encbits, ivbits);
|
|
var decbuf = new Buffer(sjcl.codec.hex.fromBits(decrypted), 'hex');
|
|
|
|
return decbuf;
|
|
};
|
|
|
|
module.exports = ECIES;
|