JavaScript实现的SHA-1加密算法完整实例

本文实例讲述了JavaScript实现的SHA-1加密算法。分享给大家供大家参考,具体如下:

/**
*
* Secure Hash Algorithm (SHA1)
* http://www.webtoolkit.info/
*
**/
function SHA1 (msg) {
  function rotate_left(n,s) {
    var t4 = ( n<<s ) | (n>>>(32-s));
    return t4;
  };
  function lsb_hex(val) {
    var str="";
    var i;
    var vh;
    var vl;
    for( i=0; i<=6; i+=2 ) {
      vh = (val>>>(i*4+4))&0x0f;
      vl = (val>>>(i*4))&0x0f;
      str += vh.toString(16) + vl.toString(16);
    }
    return str;
  };
  function cvt_hex(val) {
    var str="";
    var i;
    var v;
    for( i=7; i>=0; i-- ) {
      v = (val>>>(i*4))&0x0f;
      str += v.toString(16);
    }
    return str;
  };
  function Utf8Encode(string) {
    string = string.replace(/\r\n/g,"\n");
    var utftext = "";
    for (var n = 0; n < string.length; n++) {
      var c = string.charCodeAt(n);
      if (c < 128) {
        utftext += String.fromCharCode(c);
      }
      else if((c > 127) && (c < 2048)) {
        utftext += String.fromCharCode((c >> 6) | 192);
        utftext += String.fromCharCode((c & 63) | 128);
      }
      else {
        utftext += String.fromCharCode((c >> 12) | 224);
        utftext += String.fromCharCode(((c >> 6) & 63) | 128);
        utftext += String.fromCharCode((c & 63) | 128);
      }
    }
    return utftext;
  };
  var blockstart;
  var i, j;
  var W = new Array(80);
  var H0 = 0x67452301;
  var H1 = 0xEFCDAB89;
  var H2 = 0x98BADCFE;
  var H3 = 0x10325476;
  var H4 = 0xC3D2E1F0;
  var A, B, C, D, E;
  var temp;
  msg = Utf8Encode(msg);
  var msg_len = msg.length;
  var word_array = new Array();
  for( i=0; i<msg_len-3; i+=4 ) {
    j = msg.charCodeAt(i)<<24 | msg.charCodeAt(i+1)<<16 |
    msg.charCodeAt(i+2)<<8 | msg.charCodeAt(i+3);
    word_array.push( j );
  }
  switch( msg_len % 4 ) {
    case 0:
      i = 0x080000000;
    break;
    case 1:
      i = msg.charCodeAt(msg_len-1)<<24 | 0x0800000;
    break;
    case 2:
      i = msg.charCodeAt(msg_len-2)<<24 | msg.charCodeAt(msg_len-1)<<16 | 0x08000;
    break;
    case 3:
      i = msg.charCodeAt(msg_len-3)<<24 | msg.charCodeAt(msg_len-2)<<16 | msg.charCodeAt(msg_len-1)<<8  | 0x80;
    break;
  }
  word_array.push( i );
  while( (word_array.length % 16) != 14 ) word_array.push( 0 );
  word_array.push( msg_len>>>29 );
  word_array.push( (msg_len<<3)&0x0ffffffff );
  for ( blockstart=0; blockstart<word_array.length; blockstart+=16 ) {
    for( i=0; i<16; i++ ) W[i] = word_array[blockstart+i];
    for( i=16; i<=79; i++ ) W[i] = rotate_left(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);
    A = H0;
    B = H1;
    C = H2;
    D = H3;
    E = H4;
    for( i= 0; i<=19; i++ ) {
      temp = (rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;
      E = D;
      D = C;
      C = rotate_left(B,30);
      B = A;
      A = temp;
    }
    for( i=20; i<=39; i++ ) {
      temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;
      E = D;
      D = C;
      C = rotate_left(B,30);
      B = A;
      A = temp;
    }
    for( i=40; i<=59; i++ ) {
      temp = (rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;
      E = D;
      D = C;
      C = rotate_left(B,30);
      B = A;
      A = temp;
    }
    for( i=60; i<=79; i++ ) {
      temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;
      E = D;
      D = C;
      C = rotate_left(B,30);
      B = A;
      A = temp;
    }
    H0 = (H0 + A) & 0x0ffffffff;
    H1 = (H1 + B) & 0x0ffffffff;
    H2 = (H2 + C) & 0x0ffffffff;
    H3 = (H3 + D) & 0x0ffffffff;
    H4 = (H4 + E) & 0x0ffffffff;
  }
  var temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4);
  return temp.toLowerCase();
}

更多关于JavaScript相关内容感兴趣的读者可查看本站专题:《JavaScript数据结构与算法技巧总结》及《JavaScript数学运算用法总结》

希望本文所述对大家JavaScript程序设计有所帮助。

(0)

相关推荐

  • JavaScript SHA512&SHA256加密算法详解

    JavaScript SHA512加密算法详细代码 /* * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined * in FIPS 180-2 * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009. * Other contributors: Greg Holt, Andrew Kepert, Ydn

  • Javascript实现的SHA-256加密算法完整实例

    本文实例讲述了Javascript实现的SHA-256算法.分享给大家供大家参考,具体如下: /** * * Secure Hash Algorithm (SHA256) * http://www.webtoolkit.info/ * * Original code by Angel Marin, Paul Johnston. * **/ function SHA256(s){ var chrsz = 8; var hexcase = 0; function safe_add (x, y) {

  • JavaScript实现的encode64加密算法实例分析

    本文实例讲述了JavaScript实现的encode64加密算法.分享给大家供大家参考.具体如下: 这段JavaScript代码可实现encode64加密算法,速度还是相当不错的. //encode64编解码 (function() { var codeChar = "PaAwO65goUf7IK2vi9-xq8cFTEXLCDY1Hd3tV0ryzjbpN_BlnSs4mGRkQWMZJeuh"; window.encode64 = function(str) { var s = &

  • JS前端加密算法示例

    本文实例讲述了JS前端加密算法.分享给大家供大家参考,具体如下: 解密操作对服务器性能颇有消耗.寻思着能不能在前端完成.于是找到了crypto-js. crypto-js的github地址: https://github.com/brix/crypto-js crypto-js支持各类主流算法.弄个简单点的DES加密. function decryptByDES(ciphertext, key) { var keyHex = CryptoJS.enc.Utf8.parse(key); var d

  • 常用JS加密编码算法代码第1/2页

    一:UTF8编码函数 复制代码 代码如下: function URLEncode(Str){ if(Str==null||Str=="") return ""; var newStr=""; function toCase(sStr){ return sStr.toString(16).toUpperCase(); } for(var i=0,icode,len=Str.length;i<len;i++){ icode=Str.charCo

  • JS常用加密编码与算法实例总结

    本文实例讲述了JS常用加密编码与算法.分享给大家供大家参考,具体如下: 一:UTF8编码函数 function URLEncode(Str){ if(Str==null||Str=="") return ""; var newStr=""; function toCase(sStr){ return sStr.toString(16).toUpperCase(); } for(var i=0,icode,len=Str.length;i<l

  • JavaScript SHA1加密算法实现详细代码

    本文实例为大家介绍了JavaScript SHA1加密算法吗,供大家参考,具体内容如下 /* * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined * in FIPS 180-1 * Version 2.2 Copyright Paul Johnston 2000 - 2009. * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Los

  • JavaScript SHA512加密算法详细代码

    本文实例为大家分享了JavaScript SHA512加密算法,供大家参考,具体内容如下 /* * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined * in FIPS 180-2 * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009. * Other contributors: Greg Holt,

  • JavaScript SHA-256加密算法详细代码

    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 K

  • Java、JavaScript、Oracle、MySQL中实现的MD5加密算法分享

    MD5,全称为 Message Digest Algorithm 5(消息摘要算法第五版).详情请参考 维基百科:MD5 MD5加密后是一个字节数组, 但我们一般是取其十六进制的字符串表示法,当然,十六进制数字符串是区分大小写,在 mysql数据库,Java,和JavaScript语言中,一般是使用小写的字符串来表示, 而在 Oracle数据库官方提供的包中,返回的是大写字符串,这算是一个坑,如果你想要执行多次 md5,可能需要转换为小写. 相关的代码如下: 1. Java版MD5 MD5Uti

  • JavaScript实现SHA-1加密算法的方法

    本文实例讲述了JavaScript实现SHA-1加密算法的方法.分享给大家供大家参考.具体实现方法如下: 调用方法:hex_sha1即可. 复制代码 代码如下: /*  *  * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined  * in FIPS PUB 180-1  *  * By lizq  *  * 2006-11-11  *  */ /*  *  * Configurable var

  • 原生js的RSA和AES加密解密算法

    本文实例为大家分享了js中RSA和AES加密解密详细代码,供大家参考,具体内容如下 <!doctype html> <html> <head> <meta charset='UTF-8'> </head> <body> <div class='test'></div> <script type="text/javascript"> function encrypt(data, k

随机推荐