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57 lines
1.5 KiB
57 lines
1.5 KiB
'use strict';
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var imports = require('soop').imports();
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var sjcl = require('../sjcl');
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var ECIES = require('../common/ECIES');
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ECIES.symmetricEncrypt = function(key, iv, message) {
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var skey = sjcl.codec.hex.toBits(key.toString('hex'));
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var siv = sjcl.codec.hex.toBits(iv.toString('hex'));
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var smessage = sjcl.codec.hex.toBits(message.toString('hex'));
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sjcl.beware["CBC mode is dangerous because it doesn't protect message integrity."]();
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var params = {
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iv: siv,
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ks: 256,
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ts: 128,
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iter: 1000,
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mode: 'cbc'
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};
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var encrypted = sjcl.encrypt(skey, smessage, params);
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var enchex = sjcl.codec.hex.fromBits(sjcl.codec.base64.toBits(JSON.parse(encrypted).ct));
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var encbuf = new Buffer(enchex, 'hex');
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var r = Buffer.concat([iv, encbuf]);
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return r;
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};
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ECIES.symmetricDecrypt = function(key, encrypted) {
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var skey = sjcl.codec.hex.toBits(key.toString('hex'));
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var iv = encrypted.slice(0, 16);
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var todecrypt = encrypted.slice(16, encrypted.length);
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var siv = sjcl.codec.base64.fromBits(sjcl.codec.hex.toBits(iv.toString('hex')));
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var sct = sjcl.codec.base64.fromBits(sjcl.codec.hex.toBits(todecrypt.toString('hex')));
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sjcl.beware["CBC mode is dangerous because it doesn't protect message integrity."]();
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var obj = {
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iv: siv,
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v: 1,
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iter: 1000,
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ks: 256,
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ts: 128,
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mode: 'cbc',
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adata: '',
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cipher: 'aes',
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ct: sct
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};
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var str = JSON.stringify(obj);
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var decrypted = sjcl.decrypt(skey, str);
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var decbuf = new Buffer(decrypted);
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return decbuf;
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};
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module.exports = require('soop')(ECIES);
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