www-apps/pmwiki/cookbook/AesCrypt/aescrypt.php

   1 <?php if (!defined('PmWiki')) exit();
   2
   3 /*
   4     AesCrypt
   5
   6     Copyright 2011 Anomen (ludek_h@seznam.cz)
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published
   9     by the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11 */
  12
  13 $RecipeInfo['AesCrypt']['Version'] = '2012-DEV';
  14
  15 SDV($AesCryptKDF, 'sha256_dup');
  16 SDV($AesCryptPlainToken, '(:encrypt ');
  17 SDV($AesCryptCipherToken, '(:aes ');
  18 SDV($AesCryptEndToken, ':)');
  19 SDV($AesCryptPadding, 6);
  20 SDV($AesCryptSelectionMode, true);
  21
  22 SDV($HTMLStylesFmt['aescrypt'], "
  23 #aescryptPopupMask {
  24         position: absolute;
  25         z-index: 200;
  26         top: 0px;
  27         left: 0px;
  28         width: 100%;
  29         height: 100%;
  30         opacity: .4;
  31         filter: alpha(opacity=40);
  32         /* this hack is so it works in IE
  33          * I find setting the color in the css gives me more flexibility
  34          * than the PNG solution.
  35          */
  36         background-color:transparent !important;
  37         background-color: #333333;
  38         /* this hack is for opera support
  39          * you can uncomment the background-image if you don't care about opera.
  40          * this gives you the flexibility to use any bg color that you want, instead of the png
  41          */
  42         background-image/**/: url('$PubDirUrl/aescrypt/maskBG.png') !important; // For browsers Moz, Opera, etc.
  43         background-image:none;
  44         background-repeat: repeat;
  45         display:none;
  46 }
  47
  48 .aescrypt_overlay {
  49      visibility: hidden;
  50      position: absolute;
  51      left: 0px;
  52      top: 0px;
  53      width:100%;
  54      height:100%;
  55      text-align:center;
  56      z-index: 1000;
  57 }
  58
  59 .aescrypt_overlay div {
  60      width:300px;
  61      margin: 100px auto;
  62      background-color: #ffffff;
  63      border:1px solid #000000;
  64      padding:15px;
  65      text-align:center;
  66 }
  67 ");
  68
  69
  70 $HTMLHeaderFmt['aescrypt_common'] = "
  71 <script type=\"text/javascript\" src=\"\$PubDirUrl/aescrypt/aescrypt.js\"></script>
  72 <script type=\"text/javascript\">
  73 // <![CDATA[
  74
  75 /**
  76  * Displays and hides modal dialog.
  77  */
  78 function aescryptOverlay(id, state) {
  79   var el = document.getElementById('aescrypt_o_'+id);
  80   el.style.visibility = (state ? 'visible' : 'hidden');
  81   if (state) {
  82     var pw = document.getElementById('aescrypt_p_'+id);
  83     pw.focus();
  84     pw.value = '';
  85   }
  86 }
  87
  88 /**
  89  * Function invoked on submit of password modal dialog.
  90  * Performs decryption.
  91  */
  92 function aescryptDecSubmit(id)
  93 {
  94  aescryptOverlay(id, false);
  95  var pwel = document.getElementById('aescrypt_p_'+id);
  96  var pw = pwel.value;
  97  pwel.value = 'TopSecret';
  98  // decrypt all ?
  99  var allEl = document.getElementById('aescrypt_b_'+id);
 100
 101  var i = id;
 102  var to = id;
 103  if (allEl.checked) {
 104   i = 1;
 105   to = 10000; // just some big number
 106  }
 107
 108  while (i <= to) {
 109     var contentel = document.getElementById('aescrypt_c_'+i);
 110     if (!contentel) {
 111         break;
 112     }
 113     if (contentel.style.display == 'none') {
 114         var cipher = contentel.childNodes[0].nodeValue;
 115         var plain = AesCtr.decrypt(cipher,pw,256);
 116         var plainTrim = plain.replace(/\\s\\s*\$/, '');
 117         contentel.childNodes[0].nodeValue = plainTrim;
 118         contentel.style.display='block';
 119         var linkel = document.getElementById('aescrypt_a_'+i);
 120         if (!linkel) {
 121            alert(i);
 122         } else {
 123           linkel.style.visibility='hidden';
 124           linkel.style.display='none';
 125         }
 126     }
 127     i++;
 128  }
 129 }
 130
 131 /**
 132  * Key derivation function selected by AesCryptKDF variable.
 133  */
 134 AesCtr.kdf = function(password, nBits, nonce) {
 135     return AesCtr.kdf_$AesCryptKDF (password, nBits, nonce);
 136 }
 137
 138 // ]]>
 139 </script>
 140 ";
 141
 142 if ($action == 'edit') {
 143 $HTMLHeaderFmt['aescrypt_edit'] = "
 144 <script type=\"text/javascript\">
 145 // <![CDATA[
 146
 147 var aeascryptPopupDiv = false;
 148 /**
 149  * display modal box for encryption
 150  */
 151 function aescryptEncPopup()
 152 {
 153 //    alert('123');
 154     aescryptSelectionRange = aescryptSaveSelection();
 155
 156 //    alert(aescryptSelectionRange);
 157   if (!aeascryptPopupDiv) {
 158     var popup =  '<div id=\'aescrypt_o_enc\' class=\'aescrypt_overlay\'>'
 159         + '<div>'
 160         + '<p id=\'aescrypt_l_enc\'>Encrypt selected text:</p>'
 161         + '<form id=\'aescrypt_f_enc\' onsubmit=\'aescryptEncSubmit();return false;\'>'
 162         + '<input type=\'password\' name=\'aescrypt_p_enc\' id=\'aescrypt_p_enc\' />'
 163         + '<input type=\'submit\'  />'
 164         + '</form>' + '</div>' + '</div>';
 165
 166         var theBody = document.getElementsByTagName('BODY')[0];
 167         var popmask = document.createElement('div');
 168         popmask.id = 'aescryptPopupMask';
 169         var popcont = document.createElement('div');
 170         popcont.id = 'aescrypt_x_enc';
 171         popcont.innerHTML = popup;
 172
 173         theBody.appendChild(popmask);
 174         theBody.appendChild(popcont);
 175
 176         aeascryptPopupDiv = true;
 177   }
 178     var pwel = document.getElementById('aescrypt_p_enc');
 179     pwel.value = '';
 180
 181   aescryptOverlay('enc',true);
 182 }
 183
 184 /**
 185   * Hide modal box and encrypt selection
 186   * - how to get selection?
 187   * -
 188   */
 189 function aescryptEncSubmit() {
 190
 191     var tpart = aescryptGetSelection();
 192
 193     var pwel = document.getElementById('aescrypt_p_enc');
 194     var pw = pwel.value;
 195     pwel.value = 'TopSecret';
 196
 197     aescryptOverlay('enc', false);
 198
 199     var padding = $AesCryptPadding;
 200     var tarr = '$AesCryptCipherToken';
 201     var markup_end = '$AesCryptEndToken';
 202
 203     while ((tpart.length % padding) > 0) {
 204        tpart = tpart.concat(' ');
 205     }
 206     tpart = tpart.concat(' ');
 207
 208     tarr +=AesCtr.encrypt(tpart, pw, 256);
 209     tarr += ' ';
 210     tarr += markup_end;
 211     alert('encrypted: ' + tarr);
 212
 213   // TODO write result
 214   aescryptReplaceSelection(tarr);
 215 }
 216
 217 var aescryptSelectionRange = [0, 0];
 218
 219 /**
 220  * Get selection to be encrypted (selection mode)
 221  */
 222 function aescryptSaveSelection() {
 223
 224   var textarea = document.getElementById('text');
 225
 226   if (document.selection) { // IE variant
 227      textarea.focus();
 228      //var sel = document.selection.createRange();
 229
 230      // TODO: save selection object (easier, might not work)
 231      // or save start,length and reconstruct later ?
 232      var bm = document.selection.createRange().getBookmark();
 233       var sel = textarea.createTextRange();
 234       sel.moveToBookmark(bm);
 235
 236       var sleft = textarea.createTextRange();
 237       sleft.collapse(true);
 238       sleft.setEndPoint('EndToStart', sel);
 239       var start = sleft.text.length
 240       var end = sleft.text.length + sel.text.length;
 241       return [start, end];
 242
 243     // alert the selected text in textarea
 244     // alert(sel.text);
 245   } else {
 246     var start = textarea.selectionStart;
 247     var end = textarea.selectionEnd;
 248     if (start  < end) {
 249         return [start, end];
 250     }
 251     else {
 252         alert('Please select text to encrypt');
 253         return [0,0];
 254     }
 255   }
 256 }
 257
 258 function aescryptGetSelection() {
 259     var start = aescryptSelectionRange[0];
 260     var end = aescryptSelectionRange[1];
 261     var textarea = document.getElementById('text');
 262     var sel = textarea.value.substring(start, end);
 263     return sel;
 264 }
 265
 266 function aescryptReplaceSelection(replace) {
 267     var textarea = document.getElementById('text');
 268     var start = aescryptSelectionRange[0];
 269     var end = aescryptSelectionRange[1];
 270     var len = textarea.value.length;
 271     textarea.value = textarea.value.substring(0,start) + replace + textarea.value.substring(end,len);
 272 }
 273
 274 // ]]>
 275 </script>
 276 ";
 277 }
 278
 279
 280 /* generate decryption code */
 281 function aescryptMarkup($ciphertext)
 282 {
 283     static $id = 0;
 284     $id++;
 285     $res = "\n";
 286     $res .= "<div id=\"aescrypt_c_$id\" style=\"white-space:pre;display:none;\">$ciphertext</div>";
 287     $res .= "<div id=\"aescrypt_d_$id\">";
 288     $res .= "<a id=\"aescrypt_a_$id\" href=\"javascript:void (0);\" onClick=\"aescryptOverlay($id, true);\">";
 289     $res .= "[Decrypt]";
 290     $res .= "</a>";
 291     $res .= "</div>";
 292     $c = $ciphertext;
 293     if (strlen($c) > 30) {
 294       $c = substr($c, 0, 27) . "...";
 295     }
 296     $res .= "<div id=\"aescrypt_o_$id\" class=\"aescrypt_overlay\">
 297      <div>
 298           <p id=\"aescrypt_l_$id\">Decrypting \"$c\".</p>
 299           <form id=\"aescrypt_f_$id\" onsubmit=\"aescryptDecSubmit($id);return false;\">
 300            <label for=\"aescrypt_p_$id\">Password </label>
 301            <input type=\"password\" name=\"aescrypt_p_$id\" id=\"aescrypt_p_$id\" />
 302            <br />
 303            <input type=\"checkbox\" name=\"aescrypt_b_$id\" id=\"aescrypt_b_$id\" value=\"true\" />
 304            <label for=\"aescrypt_b_$id\">decrypt all</label>
 305            <br />
 306            <input type=\"submit\"  />
 307           </form>
 308         </div>
 309     </div>";
 310
 311     return $res;
 312 }
 313
 314 Markup('aescrypt',
 315        'directives',
 316        "/\\Q$AesCryptCipherToken\\E\\s*(.*?)\\s*\\Q$AesCryptEndToken\\E/se",
 317        "aescryptMarkup('$1')");
 318
 319 if ($action == 'edit') {
 320
 321  if (IsEnabled($EnableGUIButtons)) {
 322   $GUIButtons['aescrypt'] = array(750, '', '', '',
 323   // TODO:  add overlay DIV here & test browsers
 324    "<a href='#' onclick='aescryptEncPopup();'><img src='\$GUIButtonDirUrlFmt/aescrypt.png' title='Encrypt' /></a>");
 325  } else {
 326   // TODO: simply add overlay DIV here
 327   $MessagesFmt[] = "<input type='button' name='aesButton' value='Encrypt' onClick='aescryptEncPopup();'/>";
 328
 329  }
 330 }
 331
 332