Blowfish

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Blowfish>) encryption library for browsers and Node.js.

Find the changelog in CHANGELOG.md

Table of Contents

• Installation
• JS modules
• Usage
• Example
• Block cipher mode of operation
• Padding
• Return type

Installation

Take latest version here or with npm:

npm install egoroof-blowfish --save

JS modules

The library is only deployed in native JS modules, so in browsers you have to use script with type module:

In Nodejs it imports easily:

import { Blowfish } from 'egoroof-blowfish';

Usage

All input data including key, IV, plaintext and ciphertext should be a String or ArrayBuffer / Buffer. Strings support all unicode including emoji ✨.

Example

import { Blowfish } from 'egoroof-blowfish';
const bf = new Blowfish('super key', Blowfish.MODE.ECB, Blowfish.PADDING.NULL); // only key isn't optional
bf.setIv('abcdefgh'); // optional for ECB mode; bytes length should be equal 8
const encoded = bf.encode('input text even with emoji 🎅');
const decoded = bf.decode(encoded, Blowfish.TYPE.STRING); // type is optional

Block cipher mode of operation

https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation

Blowfish.MODE.ECB; // (default) Electronic Codebook
Blowfish.MODE.CBC; // Cipher Block Chaining

Padding

http://www.di-mgt.com.au/cryptopad.html

Blowfish.PADDING.PKCS5; // (default) Pad with bytes all of the same value as the number of padding bytes
Blowfish.PADDING.ONE_AND_ZEROS; // Pad with 0x80 followed by zero bytes
Blowfish.PADDING.LAST_BYTE; // Pad with zeroes except make the last byte equal to the number of padding bytes
Blowfish.PADDING.NULL; // Pad with zero (null) characters
Blowfish.PADDING.SPACES; // Pad with spaces

Return type

What type of data should the decode method return:

Blowfish.TYPE.STRING; // (default) String
Blowfish.TYPE.UINT8_ARRAY; // Uint8Array

--- Tranlated By Open Ai Tx | Last indexed: 2026-07-13 ---