blowfish-js

In A Nutshell
=============

This is a pure Javascript implementation of Blowfish symmetric block
cipher algorithm.

Usage
=====

``
const blf = require('./blowfish.js');
const crypto = require('crypto');
{
let key = crypto.randomBytes(32);
let context = blf.key(key);
let plaintext = 'Length is divisible by 8 to match the block size';
let ciphertext = blf.ecb(context, Buffer.from(plaintext, 'utf8'));
let decrypted = blf.ecb(context, ciphertext, true);
}
{
let key = crypto.randomBytes(16);
let iv = crypto.randomBytes(8);
let context = blf.key(key);
let plaintext = 'CBC mode also requires full blocks. Pad input data if necessary.';
let ciphertext = blf.cbc(context, iv, Buffer.from(plaintext, 'utf8'));
let decrypted = blf.cbc(context, iv, ciphertext, true);
}
{
let key = crypto.randomBytes(16);
let iv = crypto.randomBytes(8);
let context = blf.key(key);
let plaintext = 'Same with CFB. Full blocks only!';
let ciphertext = blf.cfb(context, iv, Buffer.from(plaintext, 'utf8'));
let decrypted = blf.cfb(context, iv, ciphertext, true);
}
{
let key = crypto.randomBytes(16);
let iv = crypto.randomBytes(8);
let context = blf.key(key);
let plaintext = 'With OFB, input length can be anything, but remember to use a unique IV every time! Encryption and decryption are identical in this mode.';
let ciphertext = blf.ofb(context, iv, Buffer.from(plaintext, 'utf8'));
let decrypted = blf.ofb(context, iv, ciphertext, true);
}
``

Compliance
==========

Test vectors are included into the package. Results of ecb, cbc, cfb,
and ofb functions are identical to nodejs crypto subsystem cipher
algorithms bf-ecb, bf-cbc, bf-cfb, and bf-ofb respectively.

Author
======

Timo J. Rinne

License
=======

GPL-2.0