JavaScript SHA-256加密算法详细代码


Posted in Javascript onOctober 06, 2016

本文实例为大家分享了JavaScript SHA-256加密算法,供大家参考,具体内容如下

/*
 * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
 * in FIPS 180-2
 * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for details.
 * Also http://anmar.eu.org/projects/jssha2/
 */
 
/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase    */
var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance  */
 
/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function hex_sha256(s)  { return rstr2hex(rstr_sha256(str2rstr_utf8(s))); }
function b64_sha256(s)  { return rstr2b64(rstr_sha256(str2rstr_utf8(s))); }
function any_sha256(s, e) { return rstr2any(rstr_sha256(str2rstr_utf8(s)), e); }
function hex_hmac_sha256(k, d)
 { return rstr2hex(rstr_hmac_sha256(str2rstr_utf8(k), str2rstr_utf8(d))); }
function b64_hmac_sha256(k, d)
 { return rstr2b64(rstr_hmac_sha256(str2rstr_utf8(k), str2rstr_utf8(d))); }
function any_hmac_sha256(k, d, e)
 { return rstr2any(rstr_hmac_sha256(str2rstr_utf8(k), str2rstr_utf8(d)), e); }
 
/*
 * Perform a simple self-test to see if the VM is working
 */
function sha256_vm_test()
{
 return hex_sha256("abc").toLowerCase() ==
      "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad";
}
 
/*
 * Calculate the sha256 of a raw string
 */
function rstr_sha256(s)
{
 return binb2rstr(binb_sha256(rstr2binb(s), s.length * 8));
}
 
/*
 * Calculate the HMAC-sha256 of a key and some data (raw strings)
 */
function rstr_hmac_sha256(key, data)
{
 var bkey = rstr2binb(key);
 if(bkey.length > 16) bkey = binb_sha256(bkey, key.length * 8);
 
 var ipad = Array(16), opad = Array(16);
 for(var i = 0; i < 16; i++)
 {
  ipad[i] = bkey[i] ^ 0x36363636;
  opad[i] = bkey[i] ^ 0x5C5C5C5C;
 }
 
 var hash = binb_sha256(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
 return binb2rstr(binb_sha256(opad.concat(hash), 512 + 256));
}
 
/*
 * Convert a raw string to a hex string
 */
function rstr2hex(input)
{
 try { hexcase } catch(e) { hexcase=0; }
 var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
 var output = "";
 var x;
 for(var i = 0; i < input.length; i++)
 {
  x = input.charCodeAt(i);
  output += hex_tab.charAt((x >>> 4) & 0x0F)
      + hex_tab.charAt( x    & 0x0F);
 }
 return output;
}
 
/*
 * Convert a raw string to a base-64 string
 */
function rstr2b64(input)
{
 try { b64pad } catch(e) { b64pad=''; }
 var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 var output = "";
 var len = input.length;
 for(var i = 0; i < len; i += 3)
 {
  var triplet = (input.charCodeAt(i) << 16)
        | (i + 1 < len ? input.charCodeAt(i+1) << 8 : 0)
        | (i + 2 < len ? input.charCodeAt(i+2)   : 0);
  for(var j = 0; j < 4; j++)
  {
   if(i * 8 + j * 6 > input.length * 8) output += b64pad;
   else output += tab.charAt((triplet >>> 6*(3-j)) & 0x3F);
  }
 }
 return output;
}
 
/*
 * Convert a raw string to an arbitrary string encoding
 */
function rstr2any(input, encoding)
{
 var divisor = encoding.length;
 var remainders = Array();
 var i, q, x, quotient;
 
 /* Convert to an array of 16-bit big-endian values, forming the dividend */
 var dividend = Array(Math.ceil(input.length / 2));
 for(i = 0; i < dividend.length; i++)
 {
  dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
 }
 
 /*
  * Repeatedly perform a long division. The binary array forms the dividend,
  * the length of the encoding is the divisor. Once computed, the quotient
  * forms the dividend for the next step. We stop when the dividend is zero.
  * All remainders are stored for later use.
  */
 while(dividend.length > 0)
 {
  quotient = Array();
  x = 0;
  for(i = 0; i < dividend.length; i++)
  {
   x = (x << 16) + dividend[i];
   q = Math.floor(x / divisor);
   x -= q * divisor;
   if(quotient.length > 0 || q > 0)
    quotient[quotient.length] = q;
  }
  remainders[remainders.length] = x;
  dividend = quotient;
 }
 
 /* Convert the remainders to the output string */
 var output = "";
 for(i = remainders.length - 1; i >= 0; i--)
  output += encoding.charAt(remainders[i]);
 
 /* Append leading zero equivalents */
 var full_length = Math.ceil(input.length * 8 /
                  (Math.log(encoding.length) / Math.log(2)))
 for(i = output.length; i < full_length; i++)
  output = encoding[0] + output;
 
 return output;
}
 
/*
 * Encode a string as utf-8.
 * For efficiency, this assumes the input is valid utf-16.
 */
function str2rstr_utf8(input)
{
 var output = "";
 var i = -1;
 var x, y;
 
 while(++i < input.length)
 {
  /* Decode utf-16 surrogate pairs */
  x = input.charCodeAt(i);
  y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
  if(0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF)
  {
   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
   i++;
  }
 
  /* Encode output as utf-8 */
  if(x <= 0x7F)
   output += String.fromCharCode(x);
  else if(x <= 0x7FF)
   output += String.fromCharCode(0xC0 | ((x >>> 6 ) & 0x1F),
                  0x80 | ( x     & 0x3F));
  else if(x <= 0xFFFF)
   output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
                  0x80 | ((x >>> 6 ) & 0x3F),
                  0x80 | ( x     & 0x3F));
  else if(x <= 0x1FFFFF)
   output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
                  0x80 | ((x >>> 12) & 0x3F),
                  0x80 | ((x >>> 6 ) & 0x3F),
                  0x80 | ( x     & 0x3F));
 }
 return output;
}
 
/*
 * Encode a string as utf-16
 */
function str2rstr_utf16le(input)
{
 var output = "";
 for(var i = 0; i < input.length; i++)
  output += String.fromCharCode( input.charCodeAt(i)    & 0xFF,
                 (input.charCodeAt(i) >>> 8) & 0xFF);
 return output;
}
 
function str2rstr_utf16be(input)
{
 var output = "";
 for(var i = 0; i < input.length; i++)
  output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xFF,
                  input.charCodeAt(i)    & 0xFF);
 return output;
}
 
/*
 * Convert a raw string to an array of big-endian words
 * Characters >255 have their high-byte silently ignored.
 */
function rstr2binb(input)
{
 var output = Array(input.length >> 2);
 for(var i = 0; i < output.length; i++)
  output[i] = 0;
 for(var i = 0; i < input.length * 8; i += 8)
  output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
 return output;
}
 
/*
 * Convert an array of big-endian words to a string
 */
function binb2rstr(input)
{
 var output = "";
 for(var i = 0; i < input.length * 32; i += 8)
  output += String.fromCharCode((input[i>>5] >>> (24 - i % 32)) & 0xFF);
 return output;
}
 
/*
 * Main sha256 function, with its support functions
 */
function sha256_S (X, n) {return ( X >>> n ) | (X << (32 - n));}
function sha256_R (X, n) {return ( X >>> n );}
function sha256_Ch(x, y, z) {return ((x & y) ^ ((~x) & z));}
function sha256_Maj(x, y, z) {return ((x & y) ^ (x & z) ^ (y & z));}
function sha256_Sigma0256(x) {return (sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22));}
function sha256_Sigma1256(x) {return (sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25));}
function sha256_Gamma0256(x) {return (sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3));}
function sha256_Gamma1256(x) {return (sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10));}
function sha256_Sigma0512(x) {return (sha256_S(x, 28) ^ sha256_S(x, 34) ^ sha256_S(x, 39));}
function sha256_Sigma1512(x) {return (sha256_S(x, 14) ^ sha256_S(x, 18) ^ sha256_S(x, 41));}
function sha256_Gamma0512(x) {return (sha256_S(x, 1) ^ sha256_S(x, 8) ^ sha256_R(x, 7));}
function sha256_Gamma1512(x) {return (sha256_S(x, 19) ^ sha256_S(x, 61) ^ sha256_R(x, 6));}
 
var sha256_K = new Array
(
 1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993,
 -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987,
 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522,
 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986,
 -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585,
 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291,
 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885,
 -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344,
 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218,
 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872,
 -1866530822, -1538233109, -1090935817, -965641998
);
 
function binb_sha256(m, l)
{
 var HASH = new Array(1779033703, -1150833019, 1013904242, -1521486534,
            1359893119, -1694144372, 528734635, 1541459225);
 var W = new Array(64);
 var a, b, c, d, e, f, g, h;
 var i, j, T1, T2;
 
 /* append padding */
 m[l >> 5] |= 0x80 << (24 - l % 32);
 m[((l + 64 >> 9) << 4) + 15] = l;
 
 for(i = 0; i < m.length; i += 16)
 {
  a = HASH[0];
  b = HASH[1];
  c = HASH[2];
  d = HASH[3];
  e = HASH[4];
  f = HASH[5];
  g = HASH[6];
  h = HASH[7];
 
  for(j = 0; j < 64; j++)
  {
   if (j < 16) W[j] = m[j + i];
   else W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]),
                      sha256_Gamma0256(W[j - 15])), W[j - 16]);
 
   T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)),
                             sha256_K[j]), W[j]);
   T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
   h = g;
   g = f;
   f = e;
   e = safe_add(d, T1);
   d = c;
   c = b;
   b = a;
   a = safe_add(T1, T2);
  }
 
  HASH[0] = safe_add(a, HASH[0]);
  HASH[1] = safe_add(b, HASH[1]);
  HASH[2] = safe_add(c, HASH[2]);
  HASH[3] = safe_add(d, HASH[3]);
  HASH[4] = safe_add(e, HASH[4]);
  HASH[5] = safe_add(f, HASH[5]);
  HASH[6] = safe_add(g, HASH[6]);
  HASH[7] = safe_add(h, HASH[7]);
 }
 return HASH;
}
 
function safe_add (x, y)
{
 var lsw = (x & 0xFFFF) + (y & 0xFFFF);
 var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
 return (msw << 16) | (lsw & 0xFFFF);
}

以上就是本文的全部内容,希望对大家有所帮助,希望大家继续关注三水点靠木的最新内容。

Javascript 相关文章推荐
自动完成JS类(纯JS, Ajax模式)
Mar 12 Javascript
javascript中的prototype属性使用说明(函数功能扩展)
Aug 16 Javascript
Extjs优化(一)删除冗余代码提高运行速度
Apr 15 Javascript
JS取文本框中最小值的简单实例
Nov 29 Javascript
jQuery使用addClass()方法给元素添加多个class样式
Mar 26 Javascript
轻松掌握JavaScript享元模式
Aug 27 Javascript
JavaScript数据结构之数组的表示方法示例
Apr 12 Javascript
JS简单获得节点元素的方法示例
Feb 10 Javascript
vue-rx的初步使用教程
Sep 21 Javascript
在webstorm开发微信小程序之使用阿里自定义字体图标的方法
Nov 15 Javascript
JavaScript实现秒杀时钟倒计时
Sep 29 Javascript
ES6中的类(Class)示例详解
Dec 09 Javascript
JavaScript SHA1加密算法实现详细代码
Oct 06 #Javascript
JavaScript仿网易选项卡制作代码
Oct 06 #Javascript
Javascript中作用域的详细介绍
Oct 06 #Javascript
js实现非常棒的弹出div
Oct 06 #Javascript
jQuery事件用法详解
Oct 06 #Javascript
KVM虚拟化技术之使用Qemu-kvm创建和管理虚拟机的方法
Oct 05 #Javascript
js改变html的原有内容实现方法
Oct 05 #Javascript
You might like
PHP:风雨欲来 路在何方?
2006/10/09 PHP
PHP运行环境配置与开发环境的配置(图文教程)
2013/06/04 PHP
PHP临时文件的安全性分析
2014/07/04 PHP
PHP PDOStatement::nextRowset讲解
2019/02/01 PHP
用JavaScript获取网页中的js、css、Flash等文件
2006/12/20 Javascript
JS模拟多线程
2007/02/07 Javascript
静态图片的十一种滤镜效果--不支持Ie7及非IE浏览器。
2007/03/06 Javascript
javascript 学习之旅 (2)
2009/02/05 Javascript
js格式化金额可选是否带千分位以及保留精度
2014/01/28 Javascript
jQuery实现回车键(Enter)切换文本框焦点的代码实例
2014/05/05 Javascript
jQuery()方法的第二个参数详解
2015/04/29 Javascript
js学习心得_一个简单的动画库封装tween.js
2017/07/14 Javascript
浅谈React中组件间抽象
2018/01/27 Javascript
详解vue-cli 本地开发mock数据使用方法
2018/05/29 Javascript
一步步教你利用Docker设置Node.js
2018/11/20 Javascript
js指定日期增加指定月份的实现方法
2018/12/19 Javascript
node.js使用mongoose操作数据库实现购物车的增、删、改、查功能示例
2019/12/23 Javascript
JavaScript设计模式---单例模式详解【四种基本形式】
2020/05/16 Javascript
[01:00:12]2018DOTA2亚洲邀请赛 4.7 淘汰赛 VP vs LGD 第一场
2018/04/09 DOTA
Python的ORM框架中SQLAlchemy库的查询操作的教程
2015/04/25 Python
wtfPython—Python中一组有趣微妙的代码【收藏】
2018/08/31 Python
pandas 快速处理 date_time 日期格式方法
2018/11/12 Python
linux下安装python3和对应的pip环境教程详解
2019/07/01 Python
python tkinter实现屏保程序
2019/07/30 Python
Django之全局使用request.user.username的实例详解
2020/05/14 Python
详解如何使用CSS3中的结构伪类选择器和伪元素选择器
2020/01/06 HTML / CSS
基于HTML5+tracking.js实现刷脸支付功能
2020/04/16 HTML / CSS
荷兰在线体育用品商店:Avantisport.nl
2018/07/04 全球购物
北京华建集团SQL面试题
2014/06/03 面试题
介绍一下linux的文件系统
2015/10/06 面试题
一体化教学实施方案
2014/05/10 职场文书
师德模范事迹材料
2014/06/03 职场文书
党性心得体会
2014/09/03 职场文书
2015医院个人工作总结范文
2015/05/21 职场文书
mysql连接查询中and与where的区别浅析
2021/07/01 MySQL
MySQL外键约束(Foreign Key)案例详解
2022/06/28 MySQL