hash-wasm

Hash-WASM is a fast and portable hash function library.

It is using hand-tuned WebAssembly binaries to calculate the hash faster than other libraries.

Supported algorithms

• Argon2: Argon2d, Argon2i, Argon2id (v1.3)
• BLAKE2b
• CRC32
• HMAC (with all hash algorithms)
• MD4, MD5
• PBKDF2 (with all hash algorithms)
• RIPEMD-160
• SHA-1
• SHA-2: SHA-224, SHA-256, SHA-384, SHA-512
• SHA-3: SHA3-224, SHA3-256, SHA3-384, SHA3-512
• Keccak: Keccak-224, Keccak-256, Keccak-384, Keccak-512
• xxHash: xxHash32, xxHash64

Features

• A lot faster than other JS / WASM implementations (see benchmarks below)
• Compiled from heavily optimized algorithms written in C
• Supports all modern browsers and Node.js
• Supports large data streams
• Supports UTF-8 strings and typed arrays
• Supports chunked input streams
• Works without Webpack or other bundlers
• WASM modules are bundled as base64 strings (no problems with linking)
• Supports tree shaking (it only bundles the hash algorithms you need)
• Includes TypeScript type definitions
• Works in Web Workers
• Zero dependencies
• Supports concurrent hash calculations with multiple states
• Transparent build process
• Easy to use Promise-based async API

Installation

npm i hash-wasm

or it can be inserted directly into HTML (via jsDelivr)

<script src="https://cdn.jsdelivr.net/npm/hash-wasm"></script>
<!-- defines the global `hashwasm` variable -->

Examples

React.js demo app

Hash calculator - React.js source code

Usage with the shorthand form

It is the easiest and the fastest way to calculate hashes. Use it when the input buffer is already in the memory.

import { md5, sha1, sha512, sha3 } from 'hash-wasm';

async function run() {
  console.log('MD5:', await md5('demo'));

  const int8Buffer = new Uint8Array([0, 1, 2, 3]);
  console.log('SHA1:', await sha1(int8Buffer));
  console.log('SHA512:', await sha512(int8Buffer));

  const int32Buffer = new Uint32Array([1056, 641]);
  console.log('SHA3-256:', await sha3(int32Buffer, 256));
}

run();

* See API reference

Advanced usage with streaming input

createXXXX() functions create new WASM instances with separate states, which can be used to calculate multiple hashes paralelly. They are slower compared to shorthand functions like md5(), which reuse the same WASM instance and state to do multiple calculations. For this reason, the shorthand form is always preferred when the data is already in the memory.

For the best performance, avoid calling createXXXX() functions in loops. When calculating multiple hashes sequentially, the init() function can be used to reset the internal state between runs. It is faster than creating new instances with createXXXX().

import { createSHA1 } from 'hash-wasm';

async function run() {
  const sha1 = await createSHA1();
  sha1.init();

  while (hasMoreData()) {
    const chunk = readChunk();
    sha1.update(chunk);
  }

  const hash = sha1.digest();
  console.log('SHA1:', hash);
}

run();

* See API reference

Calculating HMAC

All supported hash functions can be used to calculate HMAC. For the best performance, avoid calling createXXXX() in loops (see Advanced usage with chunked input section above)

import { createHMAC, createSHA3 } from 'hash-wasm';

async function run() {
  const hashFunc = createSHA3(224); // SHA3-224
  const hmac = await createHMAC(hashFunc, 'key');

  const fruits = ['apple', 'raspberry', 'watermelon'];
  console.log('Input:', fruits);

  const codes = fruits.map(data => {
    hmac.init();
    hmac.update(data);
    return hmac.digest();
  });

  console.log('HMAC:', codes);
}

run();

* See API reference

Calculating PBKDF2

All supported hash functions can be used to calculate PBKDF2. For the best performance, avoid calling createXXXX() in loops (see Advanced usage with chunked input section above)

import { pbkdf2, createSHA1 } from 'hash-wasm';

async function run() {
  const iterations = 1000;
  const keyLen = 32;
  const key = await pbkdf2('password', 'salt', iterations, keyLen, createSHA1());

  console.log('Derived key:', key);
}

run();

* See API reference

Browser support

Benchmark

You can make your own measurements here: link

The source code for the benchmark can be found here

Two scenarios were measured:

• throughput with the short form (input size = 32 bytes)
• throughput with the short form (input size = 1MB)

Results:

* These measurements were made with Chrome v83 on a Kaby Lake desktop CPU.

API

type IDataType = string | Buffer | Uint8Array | Uint16Array | Uint32Array;

// all functions return hash in hex format
blake2b(data: IDataType, bits?: number, key?: IDataType): Promise<string> // default is 512 bits
crc32(data: IDataType): Promise<string>
keccak(data: IDataType, bits?: 224 | 256 | 384 | 512): Promise<string> // default is 512 bits
md4(data: IDataType): Promise<string>
md5(data: IDataType): Promise<string>
ripemd160(data: IDataType): Promise<string>
sha1(data: IDataType): Promise<string>
sha224(data: IDataType): Promise<string>
sha256(data: IDataType): Promise<string>
sha3(data: IDataType, bits?: 224 | 256 | 384 | 512): Promise<string> // default is 512 bits
sha384(data: IDataType): Promise<string>
sha512(data: IDataType): Promise<string>
xxhash32(data: IDataType, seed?: number): Promise<string>
xxhash64(data: IDataType, seedLow?: number, seedHigh?: number): Promise<string>

interface IHasher {
  init: () => void;
  update: (data: IDataType) => void;
  digest: () => string; // returns hash in hex format
  blockSize: number; // in bytes
  digestSize: number; // in bytes
}

createBLAKE2b(bits?: number, key?: IDataType): Promise<IHasher> // default is 512 bits
createCRC32(): Promise<IHasher>
createKeccak(bits?: 224 | 256 | 384 | 512): Promise<IHasher> // default is 512 bits
createMD4(): Promise<IHasher>
createMD5(): Promise<IHasher>
createRIPEMD160(): Promise<IHasher>
createSHA1(): Promise<IHasher>
createSHA224(): Promise<IHasher>
createSHA256(): Promise<IHasher>
createSHA3(bits?: 224 | 256 | 384 | 512): Promise<IHasher> // default is 512 bits
createSHA384(): Promise<IHasher>
createSHA512(): Promise<IHasher>
createXXHash32(seed: number): Promise<IHasher>
createXXHash64(seedLow: number, seedHigh: number): Promise<IHasher>

createHMAC(hashFunc: Promise<IHasher>, key: IDataType): Promise<IHasher>

pbkdf2(
  password: IDataType, // password (or message) to be hashed
  salt: IDataType, // salt
  iterations: number, // number of iterations to perform
  hashLength: number, // output size in bytes
  hashFunc: Promise<IHasher> // the return value of a function like createSHA1()
): Promise<string>

argon2({
  password: IDataType, // password (or message) to be hashed
  salt: IDataType, // salt
  iterations: number, // number of iterations to perform
  parallelism: number, // degree of parallelism
  memorySize: number, // amount of memory to be used in kibibytes (1024 bytes)
  hashLength: number, // output size in bytes
  hashType: 'i' | 'd' | 'id', // argon2 variant selection
}): Promise<string>