create project
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1034e9d69e
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# v0.1.0 / 2014-01-05
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Initial release
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# js-sha256
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This is a simple SHA-256 / SHA-224 hash function for JavaScript supports UTF-8 encoding.
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## Install
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For node.js, you can use this command to install:
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npm install js-sha256
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## Usage
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If you use node.js, you should require the module first:
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```JavaScript
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sha256 = require('js-sha256');
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```
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or
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```JavaScript
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sha256 = require('js-sha256').sha256;
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sha224 = require('js-sha256').sha224;
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```
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And you could use like this:
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```JavaScript
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sha256('Message to hash');
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sha224('Message to hash');
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```
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## Example
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Code
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```JavaScript
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sha256('');
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sha256('The quick brown fox jumps over the lazy dog');
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sha256('The quick brown fox jumps over the lazy dog.');
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sha224('');
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sha224('The quick brown fox jumps over the lazy dog');
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sha224('The quick brown fox jumps over the lazy dog.');
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```
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Output
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e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
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d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592
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ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c
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d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f
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730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525
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619cba8e8e05826e9b8c519c0a5c68f4fb653e8a3d8aa04bb2c8cd4c
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It also support UTF-8 encoding:
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Code
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```JavaScript
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sha256('中文');
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sha224('中文');
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```
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Output
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72726d8818f693066ceb69afa364218b692e62ea92b385782363780f47529c21
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dfbab71afdf54388af4d55f8bd3de8c9b15e0eb916bf9125f4a959d4
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## Tests
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You can open `tests/index.html` in browser or use node.js to run test
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node tests/node-test.js
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or
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npm test
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## Extensions
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### jQuery
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If you prefer jQuery style, you can add following code to add a jQuery extension.
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Code
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```JavaScript
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jQuery.sha256 = sha256
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jQuery.sha224 = sha224
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```
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And then you could use like this:
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```JavaScript
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$.sha256('message');
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$.sha224('message');
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```
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### Prototype
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If you prefer prototype style, you can add following code to add a prototype extension.
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Code
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```JavaScript
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String.prototype.sha256 = function() {
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return sha256(this);
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};
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String.prototype.sha224 = function() {
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return sha224(this);
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};
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```
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And then you could use like this:
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```JavaScript
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'message'.sha256();
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'message'.sha224();
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```
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## Contact
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The project's website is located at https://github.com/emn178/js-sha256
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Author: emn178@gmail.com
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{
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"name": "js-sha256",
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"version": "0.1.0",
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"description": "A simple SHA-256 / SHA-224 hash function for JavaScript supports UTF-8 encoding.",
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"main": "src/sha256.js",
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"scripts": {
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"test": "node tests/node-test.js"
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},
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"repository": {
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"type": "git",
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"url": "https://github.com/emn178/js-sha256.git"
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},
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"keywords": [
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"sha",
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"sha2",
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"sha224",
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"sha256",
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"hash",
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"encryption",
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"cryptography",
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"HMAC"
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],
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"author": "emn178 <emn178@gmail.com>",
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"homepage": "https://github.com/emn178/js-sha256",
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"bugs": {
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"url": "https://github.com/emn178/js-sha256/issues"
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}
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}
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(function(root, undefined){
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'use strict';
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var HEX_CHARS = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];
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var HEX_TABLE = {
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'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9,
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'a': 10, 'b': 11, 'c': 12, 'd': 13, 'e': 14, 'f': 15,
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'A': 10, 'B': 11, 'C': 12, 'D': 13, 'E': 14, 'F': 15
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};
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var K =[0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2];
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var sha256 = function(message) {
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return sha2(message, true);
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};
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var sha224 = function(message) {
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return sha2(message, false);
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};
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var sha2 = function(message, is256) {
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if(is256 === undefined)
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is256 = true;
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var blocks = hasUTF8(message) ? UTF8toBlocks(message) : ASCIItoBlocks(message);
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if(is256)
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{
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var h0 = 0x6a09e667;
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var h1 = 0xbb67ae85;
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var h2 = 0x3c6ef372;
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var h3 = 0xa54ff53a;
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var h4 = 0x510e527f;
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var h5 = 0x9b05688c;
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var h6 = 0x1f83d9ab;
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var h7 = 0x5be0cd19;
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}
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else // 224
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{
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var h0 = 0xc1059ed8;
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var h1 = 0x367cd507;
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var h2 = 0x3070dd17;
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var h3 = 0xf70e5939;
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var h4 = 0xffc00b31;
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var h5 = 0x68581511;
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var h6 = 0x64f98fa7;
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var h7 = 0xbefa4fa4;
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}
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for(var i = 0, length = blocks.length;i < length;i += 16)
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{
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var w = [], s0, s1;
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for(var j = 0;j < 16;++j)
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w[j] = blocks[i + j];
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for(var j = 16;j < 64;++j)
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{
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s0 = rightrotate(w[j - 15], 7) ^ rightrotate(w[j - 15], 18) ^ (w[j - 15] >>> 3);
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s1 = rightrotate(w[j - 2], 17) ^ rightrotate(w[j - 2], 19) ^ (w[j - 2] >>> 10);
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w[j] = w[j - 16] + s0 + w[j - 7] + s1;
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}
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var a = h0;
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var b = h1;
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var c = h2;
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var d = h3;
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var e = h4;
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var f = h5;
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var g = h6;
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var h = h7;
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var maj, t1, t2, ch;
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for(var j = 0;j < 64;++j)
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{
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s0 = rightrotate(a, 2) ^ rightrotate(a, 13) ^ rightrotate(a, 22);
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maj = (a & b) ^ (a & c) ^ (b & c);
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t2 = s0 + maj;
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s1 = rightrotate(e, 6) ^ rightrotate(e, 11) ^ rightrotate(e, 25);
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ch = (e & f) ^ ((~ e) & g);
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t1 = (h + s1 + ch + K[j] + w[j]) & 0xffffffff;
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h = g;
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g = f;
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f = e;
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e = d + t1;
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d = c;
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c = b;
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b = a;
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a = t1 + t2;
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}
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h0 += a;
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h1 += b;
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h2 += c;
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h3 += d;
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h4 += e;
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h5 += f;
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h6 += g;
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h7 += h;
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}
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var hex = toHexString(h0) + toHexString(h1)+ toHexString(h2) + toHexString(h3) + toHexString(h4) + toHexString(h5) + toHexString(h6);
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if(is256)
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hex += toHexString(h7);
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return hex;
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};
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var rightrotate = function(x, c) {
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return (x >>> c) | (x << (32 - c));
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};
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var toHexString = function(num) {
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var hex = "";
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for(var i = 0; i < 4; i++)
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{
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var offset = 3 - i << 3;
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hex += HEX_CHARS[(num >> (offset + 4)) & 0x0F] + HEX_CHARS[(num >> offset) & 0x0F];
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}
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return hex;
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};
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var hasUTF8 = function(message) {
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var i = message.length;
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while(i--)
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if(message.charCodeAt(i) > 255)
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return true;
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return false;
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};
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var ASCIItoBlocks = function(message) {
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// a block is 32 bits(4 bytes), a chunk is 512 bits(64 bytes)
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var length = message.length;
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var chunkCount = ((length + 8) >> 6) + 1;
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var blockCount = chunkCount << 4; // chunkCount * 16
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var blocks = [];
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var i;
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for(i = 0;i < blockCount;++i)
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blocks[i] = 0;
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for(i = 0;i < length;++i)
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blocks[i >> 2] |= message.charCodeAt(i) << (3 - (i % 4) << 3);
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blocks[i >> 2] |= 0x80 << (3 - (i % 4) << 3);
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blocks[blockCount - 1] = length << 3; // length * 8
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return blocks;
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};
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var UTF8toBlocks = function(message) {
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var uri = encodeURIComponent(message);
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var blocks = [];
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for(var i = 0, bytes = 0, length = uri.length;i < length;++i)
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{
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var c = uri.charCodeAt(i);
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if(c == 37) // %
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blocks[bytes >> 2] |= ((HEX_TABLE[uri.charAt(++i)] << 4) | HEX_TABLE[uri.charAt(++i)]) << (3 - (bytes % 4) << 3);
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else
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blocks[bytes >> 2] |= c << (3 - (bytes % 4) << 3);
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++bytes;
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}
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var chunkCount = ((bytes + 8) >> 6) + 1;
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var blockCount = chunkCount << 4; // chunkCount * 16
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var index = bytes >> 2;
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blocks[index] |= 0x80 << (3 - (bytes % 4) << 3);
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for(var i = index + 1;i < blockCount;++i)
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blocks[i] = 0;
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blocks[blockCount - 1] = bytes << 3; // bytes * 8
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return blocks;
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};
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if(typeof(module) != 'undefined')
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{
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sha256.sha256 = sha256;
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sha256.sha224 = sha224;
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module.exports = sha256;
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}
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else if(root)
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{
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root.sha256 = sha256;
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root.sha224 = sha224;
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}
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}(this));
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(function(root) {
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var assert = function (title, expect, actual) {
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if(expect == actual)
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console.log(title + ': true');
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else
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console.log(title + ': false', 'Except:' + expect, 'Actual: ' + actual);
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};
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if(typeof(module) != 'undefined')
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global.assert = assert;
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else if(root)
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root.assert = assert;
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})(this);
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>SHA256</title>
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<script src="../src/sha256.js"></script>
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<script src="debug.js"></script>
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<script src="test.js"></script>
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</head>
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<body>
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</body>
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</html>
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// this also works:
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// sha256 = require('../src/sha256.js');
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sha256 = require('../src/sha256.js').sha256;
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sha224 = require('../src/sha256.js').sha224;
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require('./debug.js');
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require('./test.js');
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assert('sha256 1', 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855', sha256(''));
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assert('sha256 2', 'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592', sha256('The quick brown fox jumps over the lazy dog'));
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assert('sha256 3', 'ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c', sha256('The quick brown fox jumps over the lazy dog.'));
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assert('sha224 1', 'd14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f', sha224(''));
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assert('sha224 2', '730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525', sha224('The quick brown fox jumps over the lazy dog'));
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assert('sha224 3', '619cba8e8e05826e9b8c519c0a5c68f4fb653e8a3d8aa04bb2c8cd4c', sha224('The quick brown fox jumps over the lazy dog.'));
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Reference in New Issue