Encryptouflage

This is a module, that can encrypt and decrypt messsages.

About

With this module you can encrypt and decrypt any text message. This might be useful for encrypting Emails or Files in order to prevent third parties from monitoring the matter.

By default, the encrypted message is output in "lettered" format, camouflaging the message to automated email filters.

Usage

require the module

const encryptouflage = require('encryptouflage');

encrypt

encryptouflage.encrypt({ options })

options:

• key

key / password desired to encrypt with

instream

readable stream of data, that is to be encrypted

outstream

writable stream, that the encrypted data is written to

algorithm (optional)

cipher algorithm used

default: 'AES-256-CTR'

iv (optional)

initialization vector

default crypto.randomBytes(16)

lettered (optional)

use "lettered" formatting

default: true

example:

With lettered formatting
the initialization vector is added automatically.

const encryptouflage = require('./encryptouflage');
const fs = require('fs');

var input = fs.createReadStream('./input.txt');
var output = fs.createWriteStream('./output.encr');
var key = 'mysecretkey';

encryptouflage.encrypt({ instream: input, outstream: output, key: key });

With plain formatting
the initialization vector has to be handled manually.

const encryptouflage = require('./encryptouflage');
const fs = require('fs');

var input = fs.createReadStream('./input.txt');
var output = fs.createWriteStream('./output.encr');
var key = 'mysecretkey';

let iv = encryptouflage.encrypt({ instream: input, outstream: output, key: key, lettered: false });

output.on('close', function () {
  fs.appendFileSync(output.path, iv);
});

decrypt

encryptouflage.decrypt({ options })

options:

• key

correct key / password to decrypt with

instream

readable stream of data, that is to be decrypted

outstream

writable stream, that the decrypted data is written to

iv

initialization vector

algorithm (optional)

cipher algorithm used

default: 'AES-256-CTR'

lettered (optional)

use "lettered" formatting

default: true

example:

With lettered formatting
the original initialization vector is extracted automatically and therefore not required.

const encryptouflage = require('./encryptouflage');
const fs = require('fs');

var input = fs.createReadStream('./input.encr');
var output = fs.createWriteStream('./output.txt');
var key = 'mysecretkey';

encryptouflage.decrypt({ instream: input, outstream: output, key: key});

With plain formatting
the original initialization cannot be extracted automatically and is therefore required.

const encryptouflage = require('./encryptouflage');
const fs = require('fs');

var input = fs.createReadStream('./input.encr');
var output = fs.createWriteStream('./output.txt');
var key = 'mysecretkey';
var iv = Buffer.from('qLhMmT0icQrCyTcyWaeT7g==', 'base64');

encryptouflage.decrypt({ instream: input, outstream: output, key: key, lettered: false, iv: iv });

License

Encryptouflage is MIT licensed. You can find out more and read the license document here.