pcrypto — simple in-browser text encryption

• just two async functions, encrypt and decrypt, which operate on text strings
• in-browser only (leverages the web crypto api)
• npm module, umd format, es5
• written in typescript
• aes-gcm encryption with a 128 byte IV prefix

pre-release warning: pcrypto is in development and is not recommended for production use. the encrypt/decrpyt implementations may be subject to change between releases. ciphertext encrypted in one version of pcrypto may not be decryptable in another version

issues and pull requests wanted: please help improve pcrypto by reviewing its code and contributing by opening issues or pull requests :)

install pcrypto into your javascript web app

1. install pcrypto into your npm project

   npm install --save pcrypto

2. import pcrypto into your modern typescript or es6 code

   import {encrypt, decrypt} from "pcrypto"

3. use browserify on your code so that node_modules like pcrypto are included in your bundle

   (or use requirejs and set up some path mappings to include your node_modules)

example usage: encryption

import {encrypt} from "pcrypto"

const password = "doggos"
const plaintext = "Italian Greyhounds — السلوقي الإيطالي"

encrypt({password, plaintext})
	.then(ciphertext => console.log(`ciphertext: ${ciphertext}`))

		//» "FD084D07..."

example usage: decryption

import {decrypt} from "pcrypto"

const password = "doggos",
const ciphertext = "FD084D07F6745BE726A78D2D9691D94017A211CFB9694CE03B0"
	+ "28A0A29D8C820F48AFACF3775DFC53350156FF6C724368A3216072DD38EA703559"
	+ "E16E2887C181892DC02F8BFFE2CF87DB7B1E8895B217DAAE61C586C2314A6A0123"
	+ "7E6AB95E09A8D333BC375EE69622359F0ECF176F71109B72FA36CD623299BB3C99"
	+ "D411F969F2AF7021DA2183E148A75165DDBBCE0EA79A9E8A4157BE8AB5985B15E4"
	+ "BB62FDACA8B9C9A199E3780E74081A83C69641F0F9597B9AA3C7F4A41299C8F7C5"
	+ "41D6DE17E9B2A59"

decrypt({password, ciphertext})
	.then(plaintext => console.log(`plaintext: ${plaintext}`))

		//» "Italian Greyhounds — السلوقي الإيطالي"

alternatively, install pcrypto the old-fashioned way

• use npm to install pcrypto somewhere

• grab node_modules/pcrypto/build/pcrypto.global.bundle.js and put it by your HTML file

• put a script tag in your HTML:

  <script src="pcrypto.global.bundle.js"></script>

• use pcrypto as you will

  <script>
  	pcrypto.encrypt({password: "doggos", plaintext: "Italian Greyhounds"})
  		.then(ciphertext => console.log(`ciphertext: ${ciphertext}`))
  </script>

future considerations

in the future, pcrypto might be extended or refactored to include the ability to encrypt/decrpyt files and binary blobs.