Polybius/polybius.fyi: Polybius Hacklab Treviso (web site files) @ 6d800b5a9b4db8ab094c899d5f0fa050b65bbb65

lucaconte 7cc26e831d presentations		6 年前
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index.js	7cc26e831d presentations	6 年前
license	7cc26e831d presentations	6 年前
package.json	7cc26e831d presentations	6 年前
readme.md	7cc26e831d presentations	6 年前

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 --save hasha

Usage

var hasha = require('hasha');

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

var hasha = require('hasha');

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

var hasha = require('hasha');

// get the MD5 hash of an image
hasha.fromFile('unicorn.png', {algorithm: 'md5'}).then(function (hash) {
	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 of string|buffer

Buffer you want to hash.

While strings are supported you should prefer buffers as they're faster to hash. Though 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

encoding

Type: string
Default: hex
Values: hex, base64, buffer, binary

Encoding of the returned hash.

algorithm

Type: string
Default: sha512
Values: md5, sha1, sha256, sha512, etc (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.stream([options])

Returns a hash transform stream.

hasha.fromStream(stream, [options])

Returns a promise that resolves to a hash.

hasha.fromFile(filepath, [options])