The sha.js npm package is a module that provides cryptographic hash functions, specifically SHA (Secure Hash Algorithm) family functions. It allows for the generation of hash values from input data, which is a common requirement in various security contexts, such as password hashing, data integrity checks, and digital signatures.
SHA-256 Hash Generation
This feature allows for the generation of SHA-256 hash values from input strings. The code sample demonstrates how to create a SHA-256 hash of the string 'hello world' and output it in hexadecimal format.
"use strict";\nconst sha256 = require('sha.js').sha256;\nconst hash = new sha256().update('hello world').digest('hex');\nconsole.log(hash);SHA-512 Hash Generation
This feature enables the creation of SHA-512 hash values. The provided code sample shows how to generate a SHA-512 hash for the input 'hello world' and print the result in hex format.
"use strict";\nconst sha512 = require('sha.js').sha512;\nconst hash = new sha512().update('hello world').digest('hex');\nconsole.log(hash);Crypto-js is a package that offers a variety of cryptographic algorithms, including SHA-1, SHA-256, and SHA-512, similar to sha.js. However, it also provides many other algorithms like AES and Rabbit, making it more versatile for different cryptographic needs.
Node-forge is a comprehensive Node.js module that includes not only SHA hash functions but also other cryptographic tools like encryption, decryption, and digital signatures. It's more complex and feature-rich compared to sha.js, which focuses mainly on SHA hash functions.
Node style SHA on pure JavaScript.
var shajs = require('sha.js')
console.log(shajs('sha256').update('42').digest('hex'))
// => 73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049
console.log(new shajs.sha256().update('42').digest('hex'))
// => 73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049
var sha256stream = shajs('sha256')
sha256stream.end('42')
console.log(sha256stream.read().toString('hex'))
// => 73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049
sha.js currently implements:
Note, this doesn't actually implement a stream, but wrapping this in a stream is trivial. It does update incrementally, so you can hash things larger than RAM, as it uses a constant amount of memory (except when using base64 or utf8 encoding, see code comments).
This work is derived from Paul Johnston's A JavaScript implementation of the Secure Hash Algorithm.
FAQs
Streamable SHA hashes in pure javascript
We found that sha.js demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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