function utf8_encode ( string )
{
  string = string.replace(/\r\n/g,"\n");
  var utftext = "";
  var start, end;

  start = end = 0;
  for (var n = 0; n < string.length; n++) {
      var c1 = string.charCodeAt(n);
      var enc = null;

      if (c1 < 128) {
          end++;
      } else if((c1 > 127) && (c1 < 2048)) {
          enc = String.fromCharCode((c1 >> 6) | 192) + String.fromCharCode((c1 & 63) | 128);
      } else {
          enc = String.fromCharCode((c1 >> 12) | 224) + String.fromCharCode(((c1 >> 6) & 63) | 128) + String.fromCharCode((c1 & 63) | 128);
      }
      if (enc != null) {
          if (end > start) {
              utftext += string.substring(start, end);
          }
          utftext += enc;
          start = end = n+1;
      }
  }

  if (end > start) {
      utftext += string.substring(start, string.length);
  }

  return utftext;
}

function sha1 ( str )
{
  var rotate_left = function(n,s) {
          var t4 = ( n<<s ) | (n>>>(32-s));
          return t4;
      };

  var lsb_hex = function(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;
      };

  var cvt_hex = function(val) {
          var str="";
          var i;
          var v;

          for( i=7; i>=0; i-- ) {
              v = (val>>>(i*4))&0x0f;
              str += v.toString(16);
          }
          return str;
      };

  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;

  str = utf8_encode(str);
  var str_len = str.length;

  var word_array = new Array();
  for( i=0; i<str_len-3; i+=4 ) {
      j = str.charCodeAt(i)<<24 | str.charCodeAt(i+1)<<16 |
      str.charCodeAt(i+2)<<8 | str.charCodeAt(i+3);
      word_array.push( j );
  }

  switch( str_len % 4 ) {
      case 0:
          i = 0x080000000;
      break;
      case 1:
          i = str.charCodeAt(str_len-1)<<24 | 0x0800000;
      break;
      case 2:
          i = str.charCodeAt(str_len-2)<<24 | str.charCodeAt(str_len-1)<<16 | 0x08000;
      break;
      case 3:
          i = str.charCodeAt(str_len-3)<<24 | str.charCodeAt(str_len-2)<<16 | str.charCodeAt(str_len-1)<<8    | 0x80;
      break;
  }

  word_array.push( i );

  while( (word_array.length % 16) != 14 ) word_array.push( 0 );

  word_array.push( str_len>>>29 );
  word_array.push( (str_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();
}


function rc4(key, pt) {
	s = new Array();
	for (var i=0; i<256; i++) {
		s[i] = i;
	}
	var j = 0;
	var x;
	for (i=0; i<256; i++) {
		j = (j + s[i] + key.charCodeAt(i % key.length)) % 256;
		x = s[i];
		s[i] = s[j];
		s[j] = x;
	}
	i = 0;
	j = 0;
	var ct = '';
	for (var y=0; y<pt.length; y++) {
		i = (i + 1) % 256;
		j = (j + s[i]) % 256;
		x = s[i];
		s[i] = s[j];
		s[j] = x;
		ct += String.fromCharCode(pt.charCodeAt(y) ^ s[(s[i] + s[j]) % 256]);
	}
	return ct;
}

function bin2hex(s){
    var i, f = s.length, a = [];
    for(i = 0; i<f; i++) {
        a[i] = s.charCodeAt(i).toString(16);
    }
    return a.join('');
}