Installation

# from NPM
npm i @li0ard/sm4

# from JSR
bunx jsr i @li0ard/sm4

Supported modes

• [x] Electronic Codebook (ECB)
• [x] Cipher Block Chaining (CBC)
• [x] Output Feedback (OFB)
• [x] Counter (CTR)
• [x] Cipher Feedback (CFB)
• [x] Galois/Counter Mode (GCM)

Features

• Provides simple and modern API
• Most of the APIs are strictly typed
• Fully complies with GB/T 32907-2016 standard
• Supports Bun, Node.js, Deno, Browsers

Examples

ECB mode

import { encryptECB, decryptECB } from "@li0ard/sm4";

const key = hexToBytes("0123456789ABCDEFFEDCBA9876543210");
const plaintext = hexToBytes("AAAA....AA");
const ciphertext = encryptECB(key, plaintext);

console.log(ciphertext);
console.log(decryptECB(key, ciphertext));

CBC mode

import { encryptCBC, decryptCBC } from "@li0ard/sm4";

const key = hexToBytes("0123456789ABCDEFFEDCBA9876543210");
const key = hexToBytes("000102030405060708090A0B0C0D0E0F");
const plaintext = hexToBytes("AAAA....AA");
const ciphertext = encryptCBC(key, plaintext, iv);

console.log(ciphertext);
console.log(decryptCBC(key, ciphertext, iv));