@aws-sdk/hash-node

What is @aws-sdk/hash-node?

The @aws-sdk/hash-node package is part of the AWS SDK for JavaScript (v3) and is specifically designed for hashing functionalities within Node.js environments. It provides a set of utilities for generating hash digests of data. This can be particularly useful for creating secure, fixed-size representations of data for tasks such as validating the integrity of files, securely storing passwords, or implementing caching mechanisms.

What are @aws-sdk/hash-node's main functionalities?

Generating SHA-256 Hashes

This feature allows you to generate SHA-256 hash digests of data. The code sample demonstrates how to create a new Hash instance, update it with the data to be hashed, and then generate the digest.

const { Hash } = require('@aws-sdk/hash-node');
const hash = new Hash('sha256');
hash.update('data to hash');
const digest = await hash.digest();
console.log(digest);

Streaming Data Hashing

This feature is useful for hashing large files or streaming data. The code sample shows how to create a hash instance, stream a file, update the hash with chunks of the file, and finally generate the digest once the stream ends.

const { Hash } = require('@aws-sdk/hash-node');
const fs = require('fs');
const fileStream = fs.createReadStream('path/to/file');
const hash = new Hash('sha256');
fileStream.on('data', (chunk) => hash.update(chunk));
fileStream.on('end', async () => {
  const digest = await hash.digest();
  console.log(digest);
});

Other packages similar to @aws-sdk/hash-node

crypto

The 'crypto' module is a built-in Node.js module that provides cryptographic functionality that includes a set of wrappers for OpenSSL's hash, HMAC, cipher, decipher, sign, and verify functions. Unlike @aws-sdk/hash-node, it is built into Node.js and does not require an additional installation. It offers a wider range of cryptographic functions but might be more complex to use for simple hashing needs.

hasha

Hasha is a high-performance Node.js hashing module that makes it easy to create hash digests of data. It supports multiple algorithms and can hash strings, buffers, and streams. Compared to @aws-sdk/hash-node, hasha is more focused on simplicity and ease of use for hashing operations, without the broader AWS SDK context.

README

@aws-sdk/md5-node

An internal package

Usage

You probably shouldn't, at least directly.

Changelog

3.78.0 (2022-04-26)

Features

• client-cloudfront: CloudFront now supports the Server-Timing header in HTTP responses sent from CloudFront. You can use this header to view metrics that help you gain insights about the behavior and performance of CloudFront. To use this header, enable it in a response headers policy. (c70378d)
• client-ivschat: Adds new APIs for IVS Chat, a feature for building interactive chat experiences alongside an IVS broadcast. (1ee3b39)
• client-lightsail: This release adds support for Lightsail load balancer HTTP to HTTPS redirect and TLS policy configuration. (6bfdeba)
• client-network-firewall: AWS Network Firewall now enables customers to use a customer managed AWS KMS key for the encryption of their firewall resources. (ba3e251)
• client-sagemaker: SageMaker Inference Recommender now accepts customer KMS key ID for encryption of endpoints and compilation outputs created during inference recommendation. (85a8b9d)
• types: add pagination stopOnSameToken option (#3524) (9bf73e8)