MCrypt bindings for Node.js
apt-get install libmcrypt4 libmcrypt-dev
npm install mcrypt
Alright! There is already OpenSSL extension bundled with Node.js but there are something wrong with some traditional encryption algorithms on OpenSSL.
I tried to decrypt ciphertext of AES and DES algorithms using OpenSSL but i get the garbage outputs. There are some reasons with OpenSSL like null padding.
Also i saw same issues on the stackoverflow.com. Some people encountered with same problems.
This extension provide the cipher and decipher operations via libmcrypt
and compatible with Java Crypto and PHP MCrypt consequently.
You should start with import the package like
var mcrypt = require('mcrypt');
There are 3 exposed common functions in the package. These functions are getAlgorithmNames()
, getModeNames()
and MCrypt()
constructor function. Also there are some functions under the prototype of MCrypt()
constructor function.
getAlgorithmNames()
returns an array that contains available algorithm names. path
parameter to specify special algorithm directory. path
parameter is not required.
var mcrypt = require('mcrypt');
var algos = mcrypt.getAlgorithmNames();
console.log(algos);
Expected result like that
[ 'cast-128', 'gost', 'rijndael-128', 'twofish', 'arcfour', 'cast-256', 'loki97', 'rijndael-192', 'saferplus', 'wake', 'blowfish-compat', 'des', 'rijndael-256', 'serpent', 'xtea', 'blowfish', 'enigma', 'rc2', 'tripledes' ]
getModeNames()
returns an array that contains available mode names. path
parameter to specify special mode directory. path
parameter is not required.
var mcrypt = require('mcrypt');
var algos = mcrypt.getModeNames();
console.log(algos);
Expected result like that
[ 'cbc', 'cfb', 'ctr', 'ecb', 'ncfb', 'nofb', 'ofb', 'stream' ]
MCrypt(algorithm, mode)
is a constructor function to create object for cipher and decipher operations.
algorithm
is a required parameter and one of the values of array returned by getAlgorithmNames()
.
mode
is required parameter and one of the values of array returned by getModeNames()
.
algorithmDir
and modeDir
are optional parameters to specify algorithm and mode directories.
var MCrypt = require('mcrypt').MCrypt;
var desEcb = new MCrypt('des', 'ecb');
There are some prototype functions to make cipher decipher operations and to identify algorithm properties.
We are need to open()
with a key for decrypt()
and encrypt()
operations also we should set an iv if required by algorithm in other case iv
is optional parameter.
key
and iv
should be string or Buffer
var MCrypt = require('mcrypt').MCrypt;
var desEcb = new MCrypt('des', 'ecb');
desEcb.open('madepass'); // we are set the key
encrypt()
returns a Buffer object that contains ciphertext of plaintext
parameter. plaintext
parameter should be string
or Buffer
var MCrypt = require('mcrypt').MCrypt;
var desEcb = new MCrypt('des', 'ecb');
desEcb.open('madepass'); // we are set the key
var ciphertext = desEcb.encrypt('this is top secret message!');
console.log(ciphertext.toString('base64'));
Expected result like that
fkJnIgtiH8nsGDryyuIsmyf5vABMGStlpACfKCTifvA=
decrypt()
returns a Buffer object that contains plaintext of ciphertext
parameter. ciphertext
parameter should be Buffer
var MCrypt = require('mcrypt').MCrypt;
var desEcb = new MCrypt('des', 'ecb');
desEcb.open('madepass'); // we are set the key
var plaintext = desEcb.decrypt(new Buffer('fkJnIgtiH8nsGDryyuIsmyf5vABMGStlpACfKCTifvA=', 'base64'));
console.log(plaintext.toString());
Expected result like that
this is top secret message!
generateIv()
function generates IV randomly.
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
var iv = blowfishCfb.generateIv();
blowfishCfb.open('somekey', iv);
var ciphertext = blowfishCfb.encrypt('sometext');
console.log(Buffer.concat([iv, ciphertext]).toString('base64'));
validateKeySize()
is a function to disable or enable key size validation on open()
var mc = new MCrypt('blowfish', 'ecb');
mc.validateKeySize(false); // disable key size checking
mc.open('typeconfig.sys^_-');
validateIvSize()
is a function to disable or enable iv size validation on open()
var mc = new MCrypt('rijndael-256', 'cbc');
mc.validateIvSize(false); // disable iv size checking
mc.open('$verysec$retkey$', 'foobar');
selfTest()
is an utility function to make test algorithm internally and returns boolean value of status
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.selfTest());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.isBlockAlgorithmMode());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.isBlockAlgorithm());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.isBlockMode());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.getBlockSize());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.getKeySize());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.getSupportedKeySizes());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.getIvSize());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.hasIv());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.getAlgorithmName());
var MCrypt = require('mcrypt').MCrypt;
var blowfishCfb = new MCrypt('blowfish', 'cfb');
console.log(blowfishCfb.getModeName());