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
JQuery选择器特辑 详细小结
May 14 Javascript
javascript返回顶部效果(自写代码)
Jan 06 Javascript
JS实现窗口加载时模拟鼠标移动的方法
Jun 03 Javascript
AngularJS实现表单手动验证和表单自动验证
Dec 09 Javascript
Bootstrap基本插件学习笔记之Tooltip提示工具(18)
Dec 08 Javascript
基于javascript实现的购物商城商品倒计时实例
Dec 11 Javascript
jQuery布局组件EasyUI Layout使用方法详解
Feb 28 Javascript
iscroll.js滚动加载实例详解
Jul 18 Javascript
vue实现全选和反选功能
Aug 31 Javascript
详解动画插件wow.js的使用方法
Sep 13 Javascript
详解使用路由延迟加载 Angular 模块
Oct 12 Javascript
layui点击左侧导航栏,实现不刷新整个页面,只刷新局部的方法
Sep 25 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
40年前的这部特摄片恐龙特级克塞号80后的共同回忆
2020/03/08 日漫
Zerg兵种介绍
2020/03/14 星际争霸
php 归并排序 数组交集
2011/05/10 PHP
PHP循环结构实例讲解
2014/02/10 PHP
PHP实现redis限制单ip、单用户的访问次数功能示例
2018/06/16 PHP
select组合框option的捕捉实例代码
2008/09/30 Javascript
javascript 解析url的search方法
2010/02/09 Javascript
JS 遮照层实现代码
2010/03/31 Javascript
iphone safari不支持position fixed的解决方法
2012/05/04 Javascript
基于jquery实现的定时显示与隐藏div广告的实现代码
2013/08/22 Javascript
基于JQuery实现的图片自动进行缩放和裁剪处理
2014/01/31 Javascript
jQuery插件Validate实现自定义校验结果样式
2016/01/18 Javascript
Bootstrap模态对话框的简单使用
2016/04/29 Javascript
详解Vue方法与事件
2017/03/09 Javascript
微信小程序 在线支付功能的实现
2017/03/14 Javascript
jQuery 实现双击编辑表格功能
2017/06/19 jQuery
vue fetch中的.then()的正确使用方法
2020/04/17 Javascript
windows系统中python使用rar命令压缩多个文件夹示例
2014/05/06 Python
Python下载懒人图库JavaScript特效
2015/05/28 Python
Python的Flask框架应用调用Redis队列数据的方法
2016/06/06 Python
Python安装官方whl包和tar.gz包的方法(推荐)
2017/06/04 Python
Python Unittest根据不同测试环境跳过用例的方法
2018/12/16 Python
Python lxml模块的基本使用方法分析
2019/12/21 Python
Django-rest-framework中过滤器的定制实例
2020/04/01 Python
python plt可视化——打印特殊符号和制作图例代码
2020/04/17 Python
关于tensorflow softmax函数用法解析
2020/06/30 Python
pycharm 配置svn的图文教程(手把手教你)
2021/01/15 Python
pytorch __init__、forward与__call__的用法小结
2021/02/27 Python
安全的后院和健身蹦床:JumpSport
2019/07/15 全球购物
体育专业个人的求职信范文
2013/09/21 职场文书
幼儿园长自我鉴定
2013/10/17 职场文书
《纸船和风筝》教学反思
2014/02/15 职场文书
爱鸟护鸟的宣传语
2015/07/13 职场文书
2015年秋季运动会加油稿
2015/07/22 职场文书
Python中文分词库jieba(结巴分词)详细使用介绍
2022/04/07 Python
python​格式化字符串
2022/04/20 Python