/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Copyright (C) Paul Johnston 1999 - 2000.
 * Updated by Greg Holt 2000 - 2001.
 * See http://pajhome.org.uk/site/legal.html for details.
 */

/*
 * Convert a 32-bit number to a hex string with ls-byte first
 */
var hex_chr = "0123456789abcdef";
function rhex(num) {
  str = "";
  for(j = 0; j <= 3; j++)
    str += hex_chr.charAt((num >> (j * 8 + 4)) & 0x0F) +
           hex_chr.charAt((num >> (j * 8)) & 0x0F);
  return str;
}

/*
 * Convert a string to a sequence of 16-word blocks, stored as an array.
 * Append padding bits and the length, as described in the MD5 standard.
 */
function str2blks_MD5(str) {
  nblk = ((str.length + 8) >> 6) + 1;
  blks = new (Array)(nblk * 16);
  for(i = 0; i < nblk * 16; i++)  _proxy_jslib_assign('', blks, (i), '=', ( 0));
  for(i = 0; i < str.length; i++)
     _proxy_jslib_assign('', blks, (i >> 2), '|=', ( str.charCodeAt(i) << ((i % 4) * 8)));
   _proxy_jslib_assign('', blks, (i >> 2), '|=', ( 0x80 << ((i % 4) * 8)));
   _proxy_jslib_assign('', blks, (nblk * 16 - 2), '=', ( str.length * 8));
  return blks;
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally 
 * to work around bugs in some JS interpreters.
 */
function add(x, y) {
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/*
 * Bitwise rotate a 32-bit number to the left
 */
function rol(num, cnt) {
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * These functions implement the basic operation for each round of the
 * algorithm.
 */
function cmn(q, a, b, x, s, t) {
  return add(rol(add(add(a, q), add(x, t)), s), b);
}
function ff(a, b, c, d, x, s, t) {
  return cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function gg(a, b, c, d, x, s, t) {
  return cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function hh(a, b, c, d, x, s, t) {
  return cmn(b ^ c ^ d, a, b, x, s, t);
}
function ii(a, b, c, d, x, s, t) {
  return cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
 * Take a string and return the hex representation of its MD5.
 */
function MD5(str) {
  x = str2blks_MD5(str);
  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;
 
  for(i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = ff(a, b, c, d,  _proxy_jslib_handle(x, (i+ 0), 0, 0), 7 , -680876936);
    d = ff(d, a, b, c,  _proxy_jslib_handle(x, (i+ 1), 0, 0), 12, -389564586);
    c = ff(c, d, a, b,  _proxy_jslib_handle(x, (i+ 2), 0, 0), 17,  606105819);
    b = ff(b, c, d, a,  _proxy_jslib_handle(x, (i+ 3), 0, 0), 22, -1044525330);
    a = ff(a, b, c, d,  _proxy_jslib_handle(x, (i+ 4), 0, 0), 7 , -176418897);
    d = ff(d, a, b, c,  _proxy_jslib_handle(x, (i+ 5), 0, 0), 12,  1200080426);
    c = ff(c, d, a, b,  _proxy_jslib_handle(x, (i+ 6), 0, 0), 17, -1473231341);
    b = ff(b, c, d, a,  _proxy_jslib_handle(x, (i+ 7), 0, 0), 22, -45705983);
    a = ff(a, b, c, d,  _proxy_jslib_handle(x, (i+ 8), 0, 0), 7 ,  1770035416);
    d = ff(d, a, b, c,  _proxy_jslib_handle(x, (i+ 9), 0, 0), 12, -1958414417);
    c = ff(c, d, a, b,  _proxy_jslib_handle(x, (i+10), 0, 0), 17, -42063);
    b = ff(b, c, d, a,  _proxy_jslib_handle(x, (i+11), 0, 0), 22, -1990404162);
    a = ff(a, b, c, d,  _proxy_jslib_handle(x, (i+12), 0, 0), 7 ,  1804603682);
    d = ff(d, a, b, c,  _proxy_jslib_handle(x, (i+13), 0, 0), 12, -40341101);
    c = ff(c, d, a, b,  _proxy_jslib_handle(x, (i+14), 0, 0), 17, -1502002290);
    b = ff(b, c, d, a,  _proxy_jslib_handle(x, (i+15), 0, 0), 22,  1236535329);    

    a = gg(a, b, c, d,  _proxy_jslib_handle(x, (i+ 1), 0, 0), 5 , -165796510);
    d = gg(d, a, b, c,  _proxy_jslib_handle(x, (i+ 6), 0, 0), 9 , -1069501632);
    c = gg(c, d, a, b,  _proxy_jslib_handle(x, (i+11), 0, 0), 14,  643717713);
    b = gg(b, c, d, a,  _proxy_jslib_handle(x, (i+ 0), 0, 0), 20, -373897302);
    a = gg(a, b, c, d,  _proxy_jslib_handle(x, (i+ 5), 0, 0), 5 , -701558691);
    d = gg(d, a, b, c,  _proxy_jslib_handle(x, (i+10), 0, 0), 9 ,  38016083);
    c = gg(c, d, a, b,  _proxy_jslib_handle(x, (i+15), 0, 0), 14, -660478335);
    b = gg(b, c, d, a,  _proxy_jslib_handle(x, (i+ 4), 0, 0), 20, -405537848);
    a = gg(a, b, c, d,  _proxy_jslib_handle(x, (i+ 9), 0, 0), 5 ,  568446438);
    d = gg(d, a, b, c,  _proxy_jslib_handle(x, (i+14), 0, 0), 9 , -1019803690);
    c = gg(c, d, a, b,  _proxy_jslib_handle(x, (i+ 3), 0, 0), 14, -187363961);
    b = gg(b, c, d, a,  _proxy_jslib_handle(x, (i+ 8), 0, 0), 20,  1163531501);
    a = gg(a, b, c, d,  _proxy_jslib_handle(x, (i+13), 0, 0), 5 , -1444681467);
    d = gg(d, a, b, c,  _proxy_jslib_handle(x, (i+ 2), 0, 0), 9 , -51403784);
    c = gg(c, d, a, b,  _proxy_jslib_handle(x, (i+ 7), 0, 0), 14,  1735328473);
    b = gg(b, c, d, a,  _proxy_jslib_handle(x, (i+12), 0, 0), 20, -1926607734);
    
    a = hh(a, b, c, d,  _proxy_jslib_handle(x, (i+ 5), 0, 0), 4 , -378558);
    d = hh(d, a, b, c,  _proxy_jslib_handle(x, (i+ 8), 0, 0), 11, -2022574463);
    c = hh(c, d, a, b,  _proxy_jslib_handle(x, (i+11), 0, 0), 16,  1839030562);
    b = hh(b, c, d, a,  _proxy_jslib_handle(x, (i+14), 0, 0), 23, -35309556);
    a = hh(a, b, c, d,  _proxy_jslib_handle(x, (i+ 1), 0, 0), 4 , -1530992060);
    d = hh(d, a, b, c,  _proxy_jslib_handle(x, (i+ 4), 0, 0), 11,  1272893353);
    c = hh(c, d, a, b,  _proxy_jslib_handle(x, (i+ 7), 0, 0), 16, -155497632);
    b = hh(b, c, d, a,  _proxy_jslib_handle(x, (i+10), 0, 0), 23, -1094730640);
    a = hh(a, b, c, d,  _proxy_jslib_handle(x, (i+13), 0, 0), 4 ,  681279174);
    d = hh(d, a, b, c,  _proxy_jslib_handle(x, (i+ 0), 0, 0), 11, -358537222);
    c = hh(c, d, a, b,  _proxy_jslib_handle(x, (i+ 3), 0, 0), 16, -722521979);
    b = hh(b, c, d, a,  _proxy_jslib_handle(x, (i+ 6), 0, 0), 23,  76029189);
    a = hh(a, b, c, d,  _proxy_jslib_handle(x, (i+ 9), 0, 0), 4 , -640364487);
    d = hh(d, a, b, c,  _proxy_jslib_handle(x, (i+12), 0, 0), 11, -421815835);
    c = hh(c, d, a, b,  _proxy_jslib_handle(x, (i+15), 0, 0), 16,  530742520);
    b = hh(b, c, d, a,  _proxy_jslib_handle(x, (i+ 2), 0, 0), 23, -995338651);

    a = ii(a, b, c, d,  _proxy_jslib_handle(x, (i+ 0), 0, 0), 6 , -198630844);
    d = ii(d, a, b, c,  _proxy_jslib_handle(x, (i+ 7), 0, 0), 10,  1126891415);
    c = ii(c, d, a, b,  _proxy_jslib_handle(x, (i+14), 0, 0), 15, -1416354905);
    b = ii(b, c, d, a,  _proxy_jslib_handle(x, (i+ 5), 0, 0), 21, -57434055);
    a = ii(a, b, c, d,  _proxy_jslib_handle(x, (i+12), 0, 0), 6 ,  1700485571);
    d = ii(d, a, b, c,  _proxy_jslib_handle(x, (i+ 3), 0, 0), 10, -1894986606);
    c = ii(c, d, a, b,  _proxy_jslib_handle(x, (i+10), 0, 0), 15, -1051523);
    b = ii(b, c, d, a,  _proxy_jslib_handle(x, (i+ 1), 0, 0), 21, -2054922799);
    a = ii(a, b, c, d,  _proxy_jslib_handle(x, (i+ 8), 0, 0), 6 ,  1873313359);
    d = ii(d, a, b, c,  _proxy_jslib_handle(x, (i+15), 0, 0), 10, -30611744);
    c = ii(c, d, a, b,  _proxy_jslib_handle(x, (i+ 6), 0, 0), 15, -1560198380);
    b = ii(b, c, d, a,  _proxy_jslib_handle(x, (i+13), 0, 0), 21,  1309151649);
    a = ii(a, b, c, d,  _proxy_jslib_handle(x, (i+ 4), 0, 0), 6 , -145523070);
    d = ii(d, a, b, c,  _proxy_jslib_handle(x, (i+11), 0, 0), 10, -1120210379);
    c = ii(c, d, a, b,  _proxy_jslib_handle(x, (i+ 2), 0, 0), 15,  718787259);
    b = ii(b, c, d, a,  _proxy_jslib_handle(x, (i+ 9), 0, 0), 21, -343485551);

    a = add(a, olda);
    b = add(b, oldb);
    c = add(c, oldc);
    d = add(d, oldd);
  }
  return rhex(a) + rhex(b) + rhex(c) + rhex(d);
}

function valid_js() {
   // anything that claims NS 4 or higher functionality better work 
   if (navigator.userAgent.indexOf("Mozilla/") == 0) {
      return (parseInt(navigator.appVersion) >= 4);
   }
   return false;
}
 
function hash(form,login_url) {
    // this is Javascript enabled browser
    //document.login_form[".js"].value=1;
    // rudimentary check for a 4.x brower. should catch IE4+ and NS4.*
    var url;

    if (arguments.length > 1 && login_url != "") { // in case login_url is not passed in
      url = login_url;
    } else {
      url = "http://login.yahoo.com/config/login";
    }
    url += "?";
      
    if (valid_js()) {
      var passwd =  _proxy_jslib_handle(form.passwd, 'value', '', 0, 0);
      var challenge =  _proxy_jslib_handle( _proxy_jslib_handle(form, (".challenge"), 0, 0), 'value', '', 0, 0);
      var hash2 = MD5( _proxy_jslib_handle(form.passwd, 'value', '', 0, 0)) + challenge;
      var hash;
      if( _proxy_jslib_handle(form.passwd, 'value', '', 0, 0)){
        hash=MD5(hash2);
      } else {
        hash="";
      }
      var js = 0;

      for(i=0; i<form.elements.length; i++){
        if(typeof( _proxy_jslib_handle(form.elements, (i), 0, 0).name)=="undefined" ||  _proxy_jslib_handle(form.elements, (i), 0, 0).name.length <=0) {
          continue;
        }
        if(i > 0){
          url += "&";
        }
        url +=  _proxy_jslib_handle(form.elements, (i), 0, 0).name;
        url += "=";
        if( _proxy_jslib_handle(form.elements, (i), 0, 0).name == "passwd"){
          url += hash;
        } else if ( _proxy_jslib_handle(form.elements, (i), 0, 0).type == "checkbox" && ! _proxy_jslib_handle(form.elements, (i), 0, 0).checked) {
          url += "";
        } else if ( _proxy_jslib_handle(form.elements, (i), 0, 0).type == "radio" && ! _proxy_jslib_handle(form.elements, (i), 0, 0).checked) {
          url += "";
        } else if ( _proxy_jslib_handle(form.elements, (i), 0, 0).name == ".save"){
          url += "1"; // "Sign in" causes problem with the space
        } else if ( _proxy_jslib_handle(form.elements, (i), 0, 0).name == ".js"){
          js = 1;
          url += "1"; 
        } else {
          url += escape( _proxy_jslib_handle( _proxy_jslib_handle(form.elements, (i), 0, 0), 'value', '', 0, 0));
        }
      }
      // indicate the password is hashed.
      url += "&.hash=1";
      if(js == 0){
        url += "&.js=1";
      }
      url += "&.md5=1";
      //alert("url=" + url);
       _proxy_jslib_assign('',  _proxy_jslib_handle(null, 'location', location, 0, 0), 'href', '=', (url));
      // prevent from running this again. Allow the server response to submit the form directly
      form.onsubmit=null;

      // abort normal form submission
      return false;
    }
    // allow normal form submission
    return true;
}
function ok_password(pw) {
    var pwlen = pw.length;
    var pwChar = "";
    for(i = 0; i < pwlen; i ++){
        pwChar = pw.charCodeAt(i);
        if (pwChar < 32 || pwChar > 126){
            return false;
        }
    }
    return true;
}

function hash2(form) {
    var passwd =  _proxy_jslib_handle(form.passwd, 'value', '', 0, 0)
    if(! _proxy_jslib_handle(form.passwd, 'value', '', 0, 0)){
        return false;
    }
    if (ok_password(passwd)) {
        return true;
    }
    var challenge =  _proxy_jslib_handle( _proxy_jslib_handle(form, (".challenge"), 0, 0), 'value', '', 0, 0);
    var fullhash = MD5( MD5(passwd) + challenge );
     _proxy_jslib_assign('', form.passwd, 'value', '=', ( fullhash));
     _proxy_jslib_assign('',  _proxy_jslib_handle(form, (".md5"), 0, 0), 'value', '=', ( 1));
     _proxy_jslib_assign('',  _proxy_jslib_handle(form, (".hash"), 0, 0), 'value', '=', ( 1));
     _proxy_jslib_assign('',  _proxy_jslib_handle(form, (".js"), 0, 0), 'value', '=', ( 1));
    return true;
}


 ;
_proxy_jslib_flush_write_buffers() ;