nodejs加密解密

/**
* Created by linli on 2015/8/25.
*/
var crypto = require('crypto');

//加密
exports.cipher = function(algorithm, key, buf) {
var encrypted = "";
var cip = crypto.createCipher(algorithm, key);
encrypted += cip.update(buf, 'binary', 'hex');
encrypted += cip.final('hex');
return encrypted
};

//解密
exports.decipher = function(algorithm, key, encrypted) {
var decrypted = "";
var decipher = crypto.createDecipher(algorithm, key);
decrypted += decipher.update(encrypted, 'hex', 'binary');
decrypted += decipher.final('binary');
return decrypted
};