Tiny RSA

A tiny RSA implementation written in pure typescript, with tc39 bigint. This module only relies on standard node.js libraries (Buffer & crypto currently)

Requirements

• Deno OR Node.js >= 10.4 OR a recent browser

Features

• Supports padding
  • OAEP (original)
  • PKCS#1-OAEP
  • Raw
• Includes reusable maths library for tc39 bigints
• Compressed releases on npm
• Supports Key Generations
  • Any keysize (default 1024)
  • Any public exponent (default: 0x10001)
• Tests
  • Optimized math library
  • ROCA tested
• Only 9.0kB on nodejs (3.7kB tarball)

Basic Usage

const rsa = require('tiny-rsa')

// This can take a few seconds
const key = rsa.generateKey(1024n)

// Uses OAEP padding with MGF1-sha256 (PKCS#1)
let ciphertext = rsa.Encrypt(Buffer.from("ABC"), key)

let plaintext = rsa.Decrypt(ciphertext, key)

console.log(plaintext.toString())
// Output: ABC

Docs coming soon(tm)

Project structure

• src/ - Contains source code for tiny-rsa
• dist/ - Output after compiling tiny-rsa
• bench/ - Contains tests/benchmarks