hkdf_sm3

About

The HDKF (HMAC-based Key Derivation Function) implemented with SM3.

Install

``bash
npm install hkdf_sm3 ##use npm
yarn add hkdf_sm3 ##use yarn
pnpm install hkdf_sm3 ##use pnpm
`

Usage

`js
//es6 module
import { HKDF } from 'hdkf_sm3';
//or
import HKDF from 'hdkf_sm3';

//commonjs
const { HKDF } = require('hkdf_sm3');

const ikm = new Uint8Array([1,2,3,4,5,6,7,8])
const salt = new Uint8Array([1,2,3,4,5,6,7,8])
const info = new Uint8Array([1,2,3,4,5,6,7,8])
const length = 16;
HKDF(ikm,salt,info,length);
//Uint8Array(16) [235, 161, 114, 43, 215, 157, 61, 0, 30, 241, 88, 42,210, 63, 248, 218]
`

Params

function HKDF(key: Uint8Array, salt?: Uint8Array, info?: Uint8Array, length?: number): Uint8Array;`

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| ikm | Uint8Array | | Initial Keying Material |
| salt |Uint8Array| Uint8Array(32) [0,...,0] | Optional salt (recommended) |
| info | Uint8Array |Uint8Array(0) [] | Optional context (safe to skip) |
| length | integer | 32 | Required byte length of output |