To help you get started, we've collected the most common ways that js-sha256 is being used within popular public projects.

shd101wyy / ribbit / frontend / lib / ribbit.ts View on Github

public formatTag(tag: string): string {
    // check if this is user address
    if (this.web3.utils.isAddress(tag)) {
      return tag.toLowerCase().replace(/^0x/, "0x000000000000000000000000"); // to make it 32bytes.
    }

    // check if this is transaction hash
    if (tag.startsWith("0x") && tag.length === 66) {
      return tag.toLowerCase();
    }

    tag = chineseConv.sify(tag); // convert to simplified Chinese.
    return "0x" + sha256(tag.toLowerCase().replace(IgnoredCharacters, ""));

    /*
    const compressedTag = compressString(tag.toLowerCase().replace(/\s/g, ""));
    let hexString = hexEncode(compressedTag);
    if (hexString.length >= 64) {
      // greate than bytes32
      return "";
    } else {
      while (hexString.length !== 64) {
        // to make it 32bytes.
        hexString += "0";
      }
      return "0x" + hexString;
    }
    */
  }

View more ways to use js-sha256

js-sha256

A simple SHA-256 / SHA-224 hash function for JavaScript supports UTF-8 encoding.

Demo

SHA256 Online
SHA224 Online
SHA256 File Online
SHA225 File Online

Download

Compress
Uncompress

Installation

You can also install js-sha256 by using Bower.

bower install js-sha256

For node.js, you can use this command to install:

npm install js-sha256

Usage

You could use like this:

sha256('Message to hash');
sha224('Message to hash');

var hash = sha256.create();
hash.update('Message to hash');
hash.hex();

var hash2 = sha256.update('Message to hash');
hash2.update('Message2 to hash');
hash2.array();

// HMAC
sha256.hmac('key', 'Message to hash');
sha224.hmac('key', 'Message to hash');

var hash = sha256.hmac.create('key');
hash.update('Message to hash');
hash.hex();

var hash2 = sha256.hmac.update('key', 'Message to hash');
hash2.update('Message2 to hash');
hash2.array();

Node.js

If you use node.js, you should require the module first:

var sha256 = require('js-sha256');

or

var sha256 = require('js-sha256').sha256;
var sha224 = require('js-sha256').sha224;

or

const { sha256, sha224 } = require('js-sha256');

TypeScript

If you use TypeScript, you can import like this:

import { sha256, sha224 } from 'js-sha256';

RequireJS

It supports AMD:

require(['your/path/sha256.js'], function(sha256) {
// ...
});

Example

sha256(''); // e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
sha256('The quick brown fox jumps over the lazy dog'); // d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592
sha256('The quick brown fox jumps over the lazy dog.'); // ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c
sha224(''); // d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f
sha224('The quick brown fox jumps over the lazy dog'); // 730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525
sha224('The quick brown fox jumps over the lazy dog.'); // 619cba8e8e05826e9b8c519c0a5c68f4fb653e8a3d8aa04bb2c8cd4c

// It also supports UTF-8 encoding
sha256('中文'); // 72726d8818f693066ceb69afa364218b692e62ea92b385782363780f47529c21
sha224('中文'); // dfbab71afdf54388af4d55f8bd3de8c9b15e0eb916bf9125f4a959d4

// It also supports byte `Array`, `Uint8Array`, `ArrayBuffer` input
sha256([]); // e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
sha256(new Uint8Array([211, 212])); // 182889f925ae4e5cc37118ded6ed87f7bdc7cab5ec5e78faef2e50048999473f

// Different output
sha256(''); // e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
sha256.hex(''); // e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
sha256.array(''); // [227, 176, 196, 66, 152, 252, 28, 20, 154, 251, 244, 200, 153, 111, 185, 36, 39, 174, 65, 228, 100, 155, 147, 76, 164, 149, 153, 27, 120, 82, 184, 85]
sha256.digest(''); // [227, 176, 196, 66, 152, 252, 28, 20, 154, 251, 244, 200, 153, 111, 185, 36, 39, 174, 65, 228, 100, 155, 147, 76, 164, 149, 153, 27, 120, 82, 184, 85]
sha256.arrayBuffer(''); // ArrayBuffer

Benchmark

jsPerf Benchmark

License

The project is released under the MIT license.

Contact

The project's website is located at https://github.com/emn178/js-sha256
Author: Chen, Yi-Cyuan (emn178@gmail.com)