@aws-crypto/sha256-js

What is @aws-crypto/sha256-js?

The @aws-crypto/sha256-js package is a JavaScript implementation of the SHA-256 hash function. It is part of the AWS SDK for JavaScript and is used to compute SHA-256 cryptographic hash values. This package is particularly useful when working with AWS services that require SHA-256 hashes, such as signing requests for AWS Signature Version 4.

What are @aws-crypto/sha256-js's main functionalities?

Computing SHA-256 hash

This feature allows you to compute the SHA-256 hash of a given input. The code sample demonstrates how to create a new instance of the Sha256 class, update it with the data to be hashed, and then compute the digest.

const { Sha256 } = require('@aws-crypto/sha256-js');

async function computeHash(data) {
  const hash = new Sha256();
  hash.update(data);
  return hash.digest();
}

computeHash('data to hash').then(console.log);

Other packages similar to @aws-crypto/sha256-js

crypto-js

Crypto-js is a popular package that provides cryptographic functions including SHA-256. It offers a wide range of cryptographic algorithms and is often used for encryption and hashing in JavaScript applications. Compared to @aws-crypto/sha256-js, crypto-js is more general-purpose and not AWS-specific.

js-sha256

js-sha256 is a simple SHA-256 hash function for JavaScript that supports UTF-8 encoding. It is lightweight and has no dependencies. Unlike @aws-crypto/sha256-js, it is not part of the AWS SDK and is designed for general use cases where SHA-256 hashing is needed.

hash.js

hash.js is a JavaScript hash library that supports several hash functions including SHA-256. It is a pure JavaScript implementation and can be used in various environments. While @aws-crypto/sha256-js is focused on SHA-256 and AWS integration, hash.js provides a broader set of hash functions for different use cases.

README

crypto-sha256-js

A pure JS implementation SHA256.

Usage

• To hash "some data"

import {Sha256} from '@aws-crypto/sha256-js';

const hash = new Sha256();
hash.update('some data');
const result = await hash.digest();

• To hmac "some data" with "a key"

import {Sha256} from '@aws-crypto/sha256-js';

const hash = new Sha256('a key');
hash.update('some data');
const result = await hash.digest();

Test

npm test

Changelog

4.0.0 (2023-02-20)

• feat!: deprecate node12. (d85ca33)

BREAKING CHANGES

• Remove node12 from CI (#543)