hasha

What is hasha?

The hasha npm package is a Node.js module used for generating hashes from strings, buffers, or streams. It supports various hashing algorithms and can be used for tasks such as checksum generation, file integrity verification, and password hashing.

What are hasha's main functionalities?

String Hashing

Hash a string using a specified algorithm. In this example, the string 'unicorn' is hashed using the MD5 algorithm.

const hasha = require('hasha');

const hash = hasha('unicorn', {algorithm: 'md5'});
console.log(hash); //=> '1abcb33beeb811dca15f0ac3e47b88d9'

Buffer Hashing

Hash a buffer using a specified algorithm. Here, a buffer containing the string 'unicorn' is hashed using the SHA-256 algorithm.

const hasha = require('hasha');

const buffer = Buffer.from('unicorn');
const hash = hasha(buffer, {algorithm: 'sha256'});
console.log(hash); //=> 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'

Stream Hashing

Generate a hash for the content of a stream. In this code sample, the content of 'unicorn.txt' is hashed using the SHA-512 algorithm.

const hasha = require('hasha');
const fs = require('fs');

const stream = fs.createReadStream('unicorn.txt');
hasha.fromStream(stream, {algorithm: 'sha512'}).then(hash => {
  console.log(hash); //=> 'hash of the stream content'
});

File Hashing

Create a hash for the content of a file. This example demonstrates hashing the content of 'unicorn.txt' using the MD5 algorithm.

const hasha = require('hasha');

hasha.fromFile('unicorn.txt', {algorithm: 'md5'}).then(hash => {
  console.log(hash); //=> 'hash of the file content'
});

Hashing with Multiple Algorithms

Hash a value using multiple algorithms at once. The string 'unicorn' is hashed using both MD5 and SHA-1 algorithms, and the result is an array of hashes.

const hasha = require('hasha');

const hashes = hasha('unicorn', {algorithm: ['md5', 'sha1']});
console.log(hashes); //=> ['md5 hash', 'sha1 hash']

Other packages similar to hasha

crypto

The 'crypto' module is a built-in Node.js module that provides cryptographic functionality. It includes a diverse set of cryptographic functions, including hash, HMAC, cipher, decipher, sign, and verify. Compared to hasha, 'crypto' is more comprehensive but also more complex to use for simple hashing tasks.

md5

The 'md5' npm package is a simple module to calculate MD5 hashes. It is more limited than hasha as it only supports the MD5 algorithm, whereas hasha supports multiple algorithms.

bcrypt

The 'bcrypt' npm package is designed for hashing passwords. It automatically handles salt generation and is resistant to rainbow table attacks. While hasha can be used for password hashing, 'bcrypt' is specifically optimized for this purpose and includes additional security features.

sha.js

The 'sha.js' npm package is a module for hashing with SHA algorithms. It supports SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512. While hasha also supports these algorithms, 'sha.js' is focused solely on the SHA family of hashes.

README

Hashing made simple. Get the hash of a buffer/string/stream/file.

Convenience wrapper around the core crypto Hash class with simpler API and better defaults.

Install

$ npm install hasha

Usage

const hasha = require('hasha');

hasha('unicorn');
//=> 'e233b19aabc7d5e53826fb734d1222f1f0444c3a3fc67ff4af370a66e7cadd2cb24009f1bc86f0bed12ca5fcb226145ad10fc5f650f6ef0959f8aadc5a594b27'

const hasha = require('hasha');

(async () => {
	console.log(await hasha.async('unicorn'));
	//=> 'e233b19aabc7d5e53826fb734d1222f1f0444c3a3fc67ff4af370a66e7cadd2cb24009f1bc86f0bed12ca5fcb226145ad10fc5f650f6ef0959f8aadc5a594b27'
})();

const hasha = require('hasha');

// Hash the process input and output the hash sum
process.stdin.pipe(hasha.stream()).pipe(process.stdout);

const hasha = require('hasha');

(async () => {
	// Get the MD5 hash of an image
	const hash = await hasha.fromFile('unicorn.png', {algorithm: 'md5'});

	console.log(hash);
	//=> '1abcb33beeb811dca15f0ac3e47b88d9'
})();

API

See the Node.js crypto docs for more about hashing.

hasha(input, [options])

Returns a hash.

input

Type: Buffer | string | Array<Buffer | string>

Buffer you want to hash.

While strings are supported you should prefer buffers as they're faster to hash. Although if you already have a string you should not convert it to a buffer.

Pass an array instead of concatenating strings and/or buffers. The output is the same, but arrays do not incur the overhead of concatenation.

options

Type: object

encoding

Type: string
Default: 'hex'
Values: 'hex' 'base64' 'buffer' 'latin1'

Encoding of the returned hash.

algorithm

Type: string
Default: 'sha512'
Values: 'md5' 'sha1' 'sha256' 'sha512' (Platform dependent)

The md5 algorithm is good for file revving, but you should never use md5 or sha1 for anything sensitive. They're insecure.

hasha.async(input, options?)

In Node.js 12 or later, the operation is executed using worker_threads. A thread is lazily spawned on the first operation and lives until the end of the program execution. It's unrefed, so it won't keep the process alive.

Returns a hash asynchronously.

hasha.stream(options?)

Returns a hash transform stream.

hasha.fromStream(stream, options?)

Returns a Promise for the calculated hash.

hasha.fromFile(filepath, options?)

In Node.js 12 or later, the operation is executed using worker_threads. A thread is lazily spawned on the first operation and lives until the end of the program execution. It's unrefed, so it won't keep the process alive.

Returns a Promise for the calculated file hash.

hasha.fromFileSync(filepath, options?)

Returns the calculated file hash.

Related

• hasha-cli - CLI for this module
• crypto-hash - Tiny hashing module that uses the native crypto API in Node.js and the browser
• hash-obj - Get the hash of an object
• md5-hex - Create a MD5 hash with hex encoding