/* Copyright (c) 2006-2009 Romain Bezut
   Programme sous Licence GPL (voir le fichier LICENSE) */
var sHex = "0123456789abcdef";

function hex(i){
  var h = "", j;
  for(j = 0; j <= 3; j++)
    h += sHex.charAt((i>>(j*8+4))&0x0F)+sHex.charAt((i>>(j*8))&0x0F);
  return h;
}

function add(x, y){
  return ((x&0x7FFFFFFF) + (y&0x7FFFFFFF)) ^ (x&0x80000000) ^ (y&0x80000000);
}

function R1(A, B, C, D, X, S, T){
  var q = add(add(A, (B & C) | ((~B) & D)), add(X, T));
  return add((q << S) | (q >>> (32 - S)), B);
}
function R2(A, B, C, D, X, S, T){
  var q = add(add(A, (B & D) | (C & (~D))), add(X, T));
  return add((q << S) | (q >>> (32 - S)), B);
}
function R3(A, B, C, D, X, S, T){
  var q = add(add(A, B ^ C ^ D), add(X, T));
  return add((q << S) | (q >>> (32 - S)), B);
}
function R4(A, B, C, D, X, S, T){
  var q = add(add(A, C ^ (B | (~D))), add(X, T));
  return add((q << S) | (q >>> (32 - S)), B);
}


function calcMD5(sInp) {
  var wLen = (((sInp.length + 8) >> 6) + 1) << 4;
  var X = new Array(wLen);
  var j = 4, i;

  for (i = 0; (i * 4) < sInp.length; i++) {
    X[i] = 0;
    for (j = 0; (j < 4) && ((j + i * 4) < sInp.length); j++) {
        X[i] += sInp.charCodeAt(j + i * 4) << (j * 8);
    }
  }

  if (j == 4) X[i++] = 0x80;
  else X[i - 1] += 0x80 << (j * 8);

  for(; i < wLen; i++) X[i] = 0;

  X[wLen - 2] = sInp.length * 8;

  var a = 0x67452301, b = 0xefcdab89, c = 0x98badcfe, d = 0x10325476;

  for (i=0; i<wLen; i+=16) {
    var aO=a, bO=b, cO=c, dO=d;

    a=R1(a,b,c,d,X[i+ 0],7 ,0xd76aa478);
    d=R1(d,a,b,c,X[i+ 1],12,0xe8c7b756);
    c=R1(c,d,a,b,X[i+ 2],17,0x242070db);
    b=R1(b,c,d,a,X[i+ 3],22,0xc1bdceee);
    a=R1(a,b,c,d,X[i+ 4],7 ,0xf57c0faf);
    d=R1(d,a,b,c,X[i+ 5],12,0x4787c62a);
    c=R1(c,d,a,b,X[i+ 6],17,0xa8304613);
    b=R1(b,c,d,a,X[i+ 7],22,0xfd469501);
    a=R1(a,b,c,d,X[i+ 8],7 ,0x698098d8);
    d=R1(d,a,b,c,X[i+ 9],12,0x8b44f7af);
    c=R1(c,d,a,b,X[i+10],17,0xffff5bb1);
    b=R1(b,c,d,a,X[i+11],22,0x895cd7be);
    a=R1(a,b,c,d,X[i+12],7 ,0x6b901122);
    d=R1(d,a,b,c,X[i+13],12,0xfd987193);
    c=R1(c,d,a,b,X[i+14],17,0xa679438e);
    b=R1(b,c,d,a,X[i+15],22,0x49b40821);

    a=R2(a,b,c,d,X[i+ 1],5 ,0xf61e2562);
    d=R2(d,a,b,c,X[i+ 6],9 ,0xc040b340);
    c=R2(c,d,a,b,X[i+11],14,0x265e5a51);
    b=R2(b,c,d,a,X[i+ 0],20,0xe9b6c7aa);
    a=R2(a,b,c,d,X[i+ 5],5 ,0xd62f105d);
    d=R2(d,a,b,c,X[i+10],9 , 0x2441453);
    c=R2(c,d,a,b,X[i+15],14,0xd8a1e681);
    b=R2(b,c,d,a,X[i+ 4],20,0xe7d3fbc8);
    a=R2(a,b,c,d,X[i+ 9],5 ,0x21e1cde6);
    d=R2(d,a,b,c,X[i+14],9 ,0xc33707d6);
    c=R2(c,d,a,b,X[i+ 3],14,0xf4d50d87);
    b=R2(b,c,d,a,X[i+ 8],20,0x455a14ed);
    a=R2(a,b,c,d,X[i+13],5 ,0xa9e3e905);
    d=R2(d,a,b,c,X[i+ 2],9 ,0xfcefa3f8);
    c=R2(c,d,a,b,X[i+ 7],14,0x676f02d9);
    b=R2(b,c,d,a,X[i+12],20,0x8d2a4c8a);

    a=R3(a,b,c,d,X[i+ 5],4 ,0xfffa3942);
    d=R3(d,a,b,c,X[i+ 8],11,0x8771f681);
    c=R3(c,d,a,b,X[i+11],16,0x6d9d6122);
    b=R3(b,c,d,a,X[i+14],23,0xfde5380c);
    a=R3(a,b,c,d,X[i+ 1],4 ,0xa4beea44);
    d=R3(d,a,b,c,X[i+ 4],11,0x4bdecfa9);
    c=R3(c,d,a,b,X[i+ 7],16,0xf6bb4b60);
    b=R3(b,c,d,a,X[i+10],23,0xbebfbc70);
    a=R3(a,b,c,d,X[i+13],4 ,0x289b7ec6);
    d=R3(d,a,b,c,X[i+ 0],11,0xeaa127fa);
    c=R3(c,d,a,b,X[i+ 3],16,0xd4ef3085);
    b=R3(b,c,d,a,X[i+ 6],23, 0x4881d05);
    a=R3(a,b,c,d,X[i+ 9],4 ,0xd9d4d039);
    d=R3(d,a,b,c,X[i+12],11,0xe6db99e5);
    c=R3(c,d,a,b,X[i+15],16,0x1fa27cf8);
    b=R3(b,c,d,a,X[i+ 2],23,0xc4ac5665);

    a=R4(a,b,c,d,X[i+ 0],6 ,0xf4292244);
    d=R4(d,a,b,c,X[i+ 7],10,0x432aff97);
    c=R4(c,d,a,b,X[i+14],15,0xab9423a7);
    b=R4(b,c,d,a,X[i+ 5],21,0xfc93a039);
    a=R4(a,b,c,d,X[i+12],6 ,0x655b59c3);
    d=R4(d,a,b,c,X[i+ 3],10,0x8f0ccc92);
    c=R4(c,d,a,b,X[i+10],15,0xffeff47d);
    b=R4(b,c,d,a,X[i+ 1],21,0x85845dd1);
    a=R4(a,b,c,d,X[i+ 8],6 ,0x6fa87e4f);
    d=R4(d,a,b,c,X[i+15],10,0xfe2ce6e0);
    c=R4(c,d,a,b,X[i+ 6],15,0xa3014314);
    b=R4(b,c,d,a,X[i+13],21,0x4e0811a1);
    a=R4(a,b,c,d,X[i+ 4],6 ,0xf7537e82);
    d=R4(d,a,b,c,X[i+11],10,0xbd3af235);
    c=R4(c,d,a,b,X[i+ 2],15,0x2ad7d2bb);
    b=R4(b,c,d,a,X[i+ 9],21,0xeb86d391);

    a=add(a,aO); b=add(b,bO); c=add(c,cO); d=add(d,dO);
  }

  return hex(a)+hex(b)+hex(c)+hex(d);
}

function change_pass(aDouble) {
  var pass = document.forms['ident'].pass.value;

  if(pass == '') {
    alert('Le champ "mot de passe" est vide !');
    return false;
  }

  var md5 = calcMD5(pass);

  document.forms['ident'].pass.value = '';
  document.forms['ident'].md5.value = md5;

  if (aDouble === 1)
    document.forms['ident'].dmd5.value = calcMD5(md5);

  return true;
}

function verif_change() {
  if(!change_pass())
    return false;

  if(document.forms['ident'].newPass1.value == '') {
    alert('Le champ "nouveau mot de passe" est vide !');
    return false;
  }
  else if(document.forms['ident'].newPass1.value != document.forms['ident'].newPass2.value) {
    alert('Les mots de passe sont différents !');
    return false;
  }
  else {
    document.forms['ident'].passmd5.value = calcMD5(document.forms['ident'].newPass1.value);
    document.forms['ident'].newPass1.value = '';
    document.forms['ident'].newPass2.value = '';
    return true;
  }
}