lib/functions.php

   1 <?php
   2 /*
   3  *  Jirafeau, your web file repository
   4  *  Copyright (C) 2008  Julien "axolotl" BERNARD <axolotl@magieeternelle.org>
   5  *  Copyright (C) 2012  Jerome Jutteau <j.jutteau@gmail.com>
   6  *
   7  *  This program is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU Affero General Public License as
   9  *  published by the Free Software Foundation, either version 3 of the
  10  *  License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU Affero General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Affero General Public License
  18  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /**
  22  * Transform a string in a path by seperating each letters by a '/'.
  23   * @return path finishing with a '/'
  24  */
  25 function
  26 s2p ($s)
  27 {
  28     $p = '';
  29     for ($i = 0; $i < strlen ($s); $i++)
  30         $p .= $s{$i} . '/';
  31     return $p;
  32 }
  33
  34 /**
  35  * Convert base 16 to base 64
  36  * @returns A string based on 64 characters (0-9, a-z, A-Z, "-" and "_")
  37  */
  38 function
  39 base_16_to_64 ($num)
  40 {
  41     $m = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_';
  42     $hex2bin = array ('0000', # 0
  43                       '0001', # 1
  44                       '0010', # 2
  45                       '0011', # 3
  46                       '0100', # 4
  47                       '0101', # 5
  48                       '0110', # 6
  49                       '0111', # 7
  50                       '1000', # 8
  51                       '1001', # 9
  52                       '1010', # a
  53                       '1011', # b
  54                       '1100', # c
  55                       '1101', # d
  56                       '1110', # e
  57                       '1111'); # f
  58     $o = '';
  59     $b = '';
  60     $i = 0;
  61     # Convert long hex string to bin.
  62     $size = strlen ($num);
  63     for ($i = 0; $i < $size; $i++)
  64         $b .= $hex2bin{hexdec ($num{$i})};
  65     # Convert long bin to base 64.
  66     $size *= 4;
  67     for ($i = $size - 6; $i >= 0; $i -= 6)
  68         $o = $m{bindec (substr ($b, $i, 6))} . $o;
  69     # Some few bits remaining ?
  70     if ($i < 0 && $i > -6)
  71         $o = $m{bindec (substr ($b, 0, $i + 6))} . $o;
  72     return $o;
  73 }
  74
  75 /**
  76   * Generate a random code.
  77   * @param $l code length
  78   * @return  random code.
  79   */
  80 function
  81 jirafeau_gen_random ($l)
  82 {
  83     if ($l <= 0)
  84         return 42;
  85
  86     $code="";
  87     for ($i = 0; $i < $l; $i++)
  88         $code .= dechex (rand (0, 15));
  89
  90     return $code;
  91 }
  92
  93 function
  94 jirafeau_human_size ($octets)
  95 {
  96     $u = array ('B', 'KB', 'MB', 'GB', 'TB');
  97     $o = max ($octets, 0);
  98     $p = min (floor (($o ? log ($o) : 0) / log (1024)), count ($u) - 1);
  99     $o /= pow (1024, $p);
 100     return round ($o, 1) . $u[$p];
 101 }
 102
 103 function
 104 jirafeau_clean_rm_link ($link)
 105 {
 106     $p = s2p ("$link");
 107     if (file_exists (VAR_LINKS . $p . $link))
 108         unlink (VAR_LINKS . $p . $link);
 109     $parse = VAR_LINKS . $p;
 110     $scan = array();
 111     while (file_exists ($parse)
 112            && ($scan = scandir ($parse))
 113            && count ($scan) == 2 // '.' and '..' folders => empty.
 114            && basename ($parse) != basename (VAR_LINKS))
 115     {
 116         rmdir ($parse);
 117         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 118     }
 119 }
 120
 121 function
 122 jirafeau_clean_rm_file ($md5)
 123 {
 124     $p = s2p ("$md5");
 125     if (file_exists (VAR_FILES . $p . $md5))
 126         unlink (VAR_FILES . $p . $md5);
 127     if (file_exists (VAR_FILES . $p . $md5 . '_count'))
 128         unlink (VAR_FILES . $p . $md5 . '_count');
 129     $parse = VAR_FILES . $p;
 130     $scan = array();
 131     while (file_exists ($parse)
 132            && ($scan = scandir ($parse))
 133            && count ($scan) == 2 // '.' and '..' folders => empty.
 134            && basename ($parse) != basename (VAR_FILES))
 135     {
 136         rmdir ($parse);
 137         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 138     }
 139 }
 140
 141 /**
 142  * transforms a php.ini string representing a value in an integer
 143  * @param $value the value from php.ini
 144  * @returns an integer for this value
 145  */
 146 function jirafeau_ini_to_bytes ($value)
 147 {
 148     $modifier = substr ($value, -1);
 149     $bytes = substr ($value, 0, -1);
 150     switch (strtoupper ($modifier))
 151     {
 152     case 'P':
 153         $bytes *= 1024;
 154     case 'T':
 155         $bytes *= 1024;
 156     case 'G':
 157         $bytes *= 1024;
 158     case 'M':
 159         $bytes *= 1024;
 160     case 'K':
 161         $bytes *= 1024;
 162     default:
 163         break;
 164     }
 165     return $bytes;
 166 }
 167
 168 /**
 169  * gets the maximum upload size according to php.ini
 170  * @returns the maximum upload size in bytes
 171  */
 172 function
 173 jirafeau_get_max_upload_size_bytes ()
 174 {
 175     return min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
 176                 jirafeau_ini_to_bytes (ini_get ('upload_max_filesize')));
 177 }
 178
 179 /**
 180  * gets the maximum upload size according to php.ini
 181  * @returns the maximum upload size string
 182  */
 183 function
 184 jirafeau_get_max_upload_size ()
 185 {
 186     return jirafeau_human_size(
 187             min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
 188                  jirafeau_ini_to_bytes (ini_get ('upload_max_filesize'))));
 189 }
 190
 191 /**
 192  * gets a string explaining the error
 193  * @param $code the error code
 194  * @returns a string explaining the error
 195  */
 196 function
 197 jirafeau_upload_errstr ($code)
 198 {
 199     switch ($code)
 200     {
 201     case UPLOAD_ERR_INI_SIZE:
 202     case UPLOAD_ERR_FORM_SIZE:
 203         return t('Your file exceeds the maximum authorized file size. ');
 204         break;
 205
 206     case UPLOAD_ERR_PARTIAL:
 207     case UPLOAD_ERR_NO_FILE:
 208         return
 209             t
 210             ('Your file was not uploaded correctly. You may succeed in retrying. ');
 211         break;
 212
 213     case UPLOAD_ERR_NO_TMP_DIR:
 214     case UPLOAD_ERR_CANT_WRITE:
 215     case UPLOAD_ERR_EXTENSION:
 216         return t('Internal error. You may not succeed in retrying. ');
 217         break;
 218
 219     default:
 220         break;
 221     }
 222     return t('Unknown error. ');
 223 }
 224
 225 /** Remove link and it's file
 226  * @param $link the link's name (hash)
 227  */
 228
 229 function
 230 jirafeau_delete_link ($link)
 231 {
 232     $l = jirafeau_get_link ($link);
 233     if (!count ($l))
 234         return;
 235
 236     jirafeau_clean_rm_link ($link);
 237
 238     $md5 = $l['md5'];
 239     $p = s2p ("$md5");
 240
 241     $counter = 1;
 242     if (file_exists (VAR_FILES . $p . $md5. '_count'))
 243     {
 244         $content = file (VAR_FILES . $p . $md5. '_count');
 245         $counter = trim ($content[0]);
 246     }
 247     $counter--;
 248
 249     if ($counter >= 1)
 250     {
 251         $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 252         fwrite ($handle, $counter);
 253         fclose ($handle);
 254     }
 255
 256     if ($counter == 0)
 257         jirafeau_clean_rm_file ($md5);
 258 }
 259
 260 /**
 261  * Delete a file and it's links.
 262  */
 263 function
 264 jirafeau_delete_file ($md5)
 265 {
 266     $count = 0;
 267     /* Get all links files. */
 268     $stack = array (VAR_LINKS);
 269     while (($d = array_shift ($stack)) && $d != NULL)
 270     {
 271         $dir = scandir ($d);
 272
 273         foreach ($dir as $node)
 274         {
 275             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 276                 preg_match ('/\.tmp/i', "$node"))
 277                 continue;
 278
 279             if (is_dir ($d . $node))
 280             {
 281                 /* Push new found directory. */
 282                 $stack[] = $d . $node . '/';
 283             }
 284             elseif (is_file ($d . $node))
 285             {
 286                 /* Read link informations. */
 287                 $l = jirafeau_get_link (basename ($node));
 288                 if (!count ($l))
 289                     continue;
 290                 if ($l['md5'] == $md5)
 291                 {
 292                     $count++;
 293                     jirafeau_delete_link ($node);
 294                 }
 295             }
 296         }
 297     }
 298     jirafeau_clean_rm_file ($md5);
 299     return $count;
 300 }
 301
 302 /**
 303  * handles an uploaded file
 304  * @param $file the file struct given by $_FILE[]
 305  * @param $one_time_download is the file a one time download ?
 306  * @param $key if not empty, protect the file with this key
 307  * @param $time the time of validity of the file
 308  * @param $ip uploader's ip
 309  * @param $crypt boolean asking to crypt or not
 310  * @param $link_name_length size of the link name
 311  * @returns an array containing some information
 312  *   'error' => information on possible errors
 313  *   'link' => the link name of the uploaded file
 314  *   'delete_link' => the link code to delete file
 315  */
 316 function
 317 jirafeau_upload ($file, $one_time_download, $key, $time, $ip, $crypt, $link_name_length)
 318 {
 319     if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
 320     {
 321         return (array(
 322                  'error' =>
 323                    array ('has_error' => true,
 324                           'why' => jirafeau_upload_errstr ($file['error'])),
 325                  'link' => '',
 326                  'delete_link' => ''));
 327     }
 328
 329     /* array representing no error */
 330     $noerr = array ('has_error' => false, 'why' => '');
 331
 332     /* Crypt file if option is enabled. */
 333     $crypted = false;
 334     $crypt_key = '';
 335     if ($crypt == true && extension_loaded('mcrypt'))
 336     {
 337         $crypt_key = jirafeau_encrypt_file ($file['tmp_name'], $file['tmp_name']);
 338         if (strlen($crypt_key) > 0)
 339             $crypted = true;
 340     }
 341
 342     /* file informations */
 343     $md5 = md5_file ($file['tmp_name']);
 344     $name = str_replace (NL, '', trim ($file['name']));
 345     $mime_type = $file['type'];
 346     $size = $file['size'];
 347
 348     /* does file already exist ? */
 349     $rc = false;
 350     $p = s2p ("$md5");
 351     if (file_exists (VAR_FILES . $p .  $md5))
 352     {
 353         $rc = unlink ($file['tmp_name']);
 354     }
 355     elseif ((file_exists (VAR_FILES . $p) || @mkdir (VAR_FILES . $p, 0755, true))
 356             && move_uploaded_file ($file['tmp_name'], VAR_FILES . $p . $md5))
 357     {
 358         $rc = true;
 359     }
 360     if (!$rc)
 361     {
 362         return (array(
 363                  'error' =>
 364                    array ('has_error' => true,
 365                           'why' => t('Internal error during file creation.')),
 366                  'link' =>'',
 367                  'delete_link' => ''));
 368     }
 369
 370     /* Increment or create count file. */
 371     $counter = 0;
 372     if (file_exists (VAR_FILES . $p . $md5 . '_count'))
 373     {
 374         $content = file (VAR_FILES . $p . $md5. '_count');
 375         $counter = trim ($content[0]);
 376     }
 377     $counter++;
 378     $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 379     fwrite ($handle, $counter);
 380     fclose ($handle);
 381
 382     /* Create delete code. */
 383     $delete_link_code = jirafeau_gen_random (5);
 384
 385     /* md5 password or empty. */
 386     $password = '';
 387     if (!empty ($key))
 388         $password = md5 ($key);
 389
 390     /* create link file */
 391     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
 392     $handle = fopen ($link_tmp_name, 'w');
 393     fwrite ($handle,
 394             $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
 395             NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .
 396             NL . $ip . NL. $delete_link_code . NL . ($crypted ? 'C' : 'O'));
 397     fclose ($handle);
 398     $md5_link = substr(base_16_to_64 (md5_file ($link_tmp_name)), 0, $link_name_length);
 399     $l = s2p ("$md5_link");
 400     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 401         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 402     {
 403         if (file_exists ($link_tmp_name))
 404             unlink ($link_tmp_name);
 405
 406         $counter--;
 407         if ($counter >= 1)
 408         {
 409             $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 410             fwrite ($handle, $counter);
 411             fclose ($handle);
 412         }
 413         else
 414         {
 415             jirafeau_clean_rm_file ($md5_link);
 416         }
 417         return (array(
 418                  'error' =>
 419                    array ('has_error' => true,
 420                           'why' => t('Internal error during file creation. ')),
 421                  'link' =>'',
 422                  'delete_link' => ''));
 423     }
 424    return (array ('error' => $noerr,
 425                   'link' => $md5_link,
 426                   'delete_link' => $delete_link_code,
 427                   'crypt_key' => $crypt_key));
 428 }
 429
 430 /**
 431  * tells if a mime-type is viewable in a browser
 432  * @param $mime the mime type
 433  * @returns a boolean telling if a mime type is viewable
 434  */
 435 function
 436 jirafeau_is_viewable ($mime)
 437 {
 438     if (!empty ($mime))
 439     {
 440         /* Actually, verify if mime-type is an image or a text. */
 441         $viewable = array ('image', 'text');
 442         $decomposed = explode ('/', $mime);
 443         return in_array ($decomposed[0], $viewable);
 444     }
 445     return false;
 446 }
 447
 448 // Error handling functions.
 449 //! Global array that contains all registered errors.
 450 $error_list = array ();
 451
 452 /**
 453  * Adds an error to the list of errors.
 454  * @param $title the error's title
 455  * @param $description is a human-friendly description of the problem.
 456  */
 457 function
 458 add_error ($title, $description)
 459 {
 460     global $error_list;
 461     $error_list[] = '<p>' . $title. '<br />' . $description. '</p>';
 462 }
 463
 464 /**
 465  * Informs whether any error has been registered yet.
 466  * @return true if there are errors.
 467  */
 468 function
 469 has_error ()
 470 {
 471     global $error_list;
 472     return !empty ($error_list);
 473 }
 474
 475 /**
 476  * Displays all the errors.
 477  */
 478 function
 479 show_errors ()
 480 {
 481     if (has_error ())
 482     {
 483         global $error_list;
 484         echo '<div class="error">';
 485         foreach ($error_list as $error)
 486         {
 487             echo $error;
 488         }
 489         echo '</div>';
 490     }
 491 }
 492
 493 function check_errors ()
 494 {
 495     if (file_exists (JIRAFEAU_ROOT . 'install.php')
 496         && !file_exists (JIRAFEAU_ROOT . 'lib/config.local.php'))
 497     {
 498         header('Location: install.php');
 499         exit;
 500     }
 501
 502     /* check if the destination dirs are writable */
 503     $writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
 504
 505     /* Checking for errors. */
 506     if (!is_writable (VAR_FILES))
 507         add_error (t('The file directory is not writable!'), VAR_FILES);
 508
 509     if (!is_writable (VAR_LINKS))
 510         add_error (t('The link directory is not writable!'), VAR_LINKS);
 511
 512     if (!is_writable (VAR_ASYNC))
 513         add_error (t('The async directory is not writable!'), VAR_ASYNC);
 514
 515      if (!is_writable (VAR_BLOCK))
 516         add_error (t('The block directory is not writable!'), VAR_BLOCK);
 517
 518    /* Check if the install.php script is still in the directory. */
 519     if (file_exists (JIRAFEAU_ROOT . 'install.php'))
 520         add_error (t('Installer script still present'),
 521              t('Please make sure to delete the installer script ' .
 522                '"install.php" before continuing.'));
 523 }
 524
 525 /**
 526  * Read link informations
 527  * @return array containing informations.
 528  */
 529 function
 530 jirafeau_get_link ($hash)
 531 {
 532     $out = array ();
 533     $link = VAR_LINKS . s2p ("$hash") . $hash;
 534
 535     if (!file_exists ($link))
 536         return $out;
 537
 538     $c = file ($link);
 539     $out['file_name'] = trim ($c[0]);
 540     $out['mime_type'] = trim ($c[1]);
 541     $out['file_size'] = trim ($c[2]);
 542     $out['key'] = trim ($c[3], NL);
 543     $out['time'] = trim ($c[4]);
 544     $out['md5'] = trim ($c[5]);
 545     $out['onetime'] = trim ($c[6]);
 546     $out['upload_date'] = trim ($c[7]);
 547     $out['ip'] = trim ($c[8]);
 548     $out['link_code'] = trim ($c[9]);
 549     if (trim ($c[10]) == 'C')
 550             $out['crypted'] = true;
 551
 552     return $out;
 553 }
 554
 555 /**
 556  * List files in admin interface.
 557  */
 558 function
 559 jirafeau_admin_list ($name, $file_hash, $link_hash)
 560 {
 561     echo '<fieldset><legend>';
 562     if (!empty ($name))
 563         echo t('Filename') . ": $name ";
 564     if (!empty ($file_hash))
 565         echo t('file') . ": $file_hash ";
 566     if (!empty ($link_hash))
 567         echo t('link') . ": $link_hash ";
 568     if (empty ($name) && empty ($file_hash) && empty ($link_hash))
 569         echo t('List all files');
 570     echo '</legend>';
 571     echo '<table>';
 572     echo '<tr>';
 573     echo '<td>' . t('Filename') . '</td>';
 574     echo '<td>' . t('Type') . '</td>';
 575     echo '<td>' . t('Size') . '</td>';
 576     echo '<td>' . t('Expire') . '</td>';
 577     echo '<td>' . t('Onetime') . '</td>';
 578     echo '<td>' . t('Upload date') . '</td>';
 579     echo '<td>' . t('Origin') . '</td>';
 580     echo '<td>' . t('Action') . '</td>';
 581     echo '</tr>';
 582
 583     /* Get all links files. */
 584     $stack = array (VAR_LINKS);
 585     while (($d = array_shift ($stack)) && $d != NULL)
 586     {
 587         $dir = scandir ($d);
 588         foreach ($dir as $node)
 589         {
 590             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 591                 preg_match ('/\.tmp/i', "$node"))
 592                 continue;
 593             if (is_dir ($d . $node))
 594             {
 595                 /* Push new found directory. */
 596                 $stack[] = $d . $node . '/';
 597             }
 598             elseif (is_file ($d . $node))
 599             {
 600                 /* Read link informations. */
 601                 $l = jirafeau_get_link ($node);
 602                 if (!count ($l))
 603                     continue;
 604
 605                 /* Filter. */
 606                 if (!empty ($name) && !preg_match ("/$name/i", $l['file_name']))
 607                     continue;
 608                 if (!empty ($file_hash) && $file_hash != $l['md5'])
 609                     continue;
 610                 if (!empty ($link_hash) && $link_hash != $node)
 611                     continue;
 612                 /* Print link informations. */
 613                 echo '<tr>';
 614                 echo '<td>' .
 615                 '<form action = "admin.php" method = "post">' .
 616                 '<input type = "hidden" name = "action" value = "download"/>' .
 617                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 618                 '<input type = "submit" value = "' . $l['file_name'] . '" />' .
 619                 '</form>';
 620                 echo '</td>';
 621                 echo '<td>' . $l['mime_type'] . '</td>';
 622                 echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
 623                 echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
 624                      '</td>';
 625                 echo '<td>' . $l['onetime'] . '</td>';
 626                 echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
 627                 echo '<td>' . $l['ip'] . '</td>';
 628                 echo '<td>' .
 629                 '<form action = "admin.php" method = "post">' .
 630                 '<input type = "hidden" name = "action" value = "delete_link"/>' .
 631                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 632                 '<input type = "submit" value = "' . t('Del link') . '" />' .
 633                 '</form>' .
 634                 '<form action = "admin.php" method = "post">' .
 635                 '<input type = "hidden" name = "action" value = "delete_file"/>' .
 636                 '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
 637                 '<input type = "submit" value = "' . t('Del file and links') . '" />' .
 638                 '</form>' .
 639                 '</td>';
 640                 echo '</tr>';
 641             }
 642         }
 643     }
 644     echo '</table></fieldset>';
 645 }
 646
 647 /**
 648  * Clean expired files.
 649  * @return number of cleaned files.
 650  */
 651 function
 652 jirafeau_admin_clean ()
 653 {
 654     $count = 0;
 655     /* Get all links files. */
 656     $stack = array (VAR_LINKS);
 657     while (($d = array_shift ($stack)) && $d != NULL)
 658     {
 659         $dir = scandir ($d);
 660
 661         foreach ($dir as $node)
 662         {
 663             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 664                 preg_match ('/\.tmp/i', "$node"))
 665                 continue;
 666
 667             if (is_dir ($d . $node))
 668             {
 669                 /* Push new found directory. */
 670                 $stack[] = $d . $node . '/';
 671             }
 672             elseif (is_file ($d . $node))
 673             {
 674                 /* Read link informations. */
 675                 $l = jirafeau_get_link (basename ($node));
 676                 if (!count ($l))
 677                     continue;
 678                 $p = s2p ($l['md5']);
 679                 if ($l['time'] > 0 && $l['time'] < time () || // expired
 680                     !file_exists (VAR_FILES . $p . $l['md5']) || // invalid
 681                     !file_exists (VAR_FILES . $p . $l['md5'] . '_count')) // invalid
 682                 {
 683                     jirafeau_delete_link ($node);
 684                     $count++;
 685                 }
 686             }
 687         }
 688     }
 689     return $count;
 690 }
 691
 692
 693 /**
 694  * Clean old async transferts.
 695  * @return number of cleaned files.
 696  */
 697 function
 698 jirafeau_admin_clean_async ()
 699 {
 700     $count = 0;
 701     /* Get all links files. */
 702     $stack = array (VAR_ASYNC);
 703     while (($d = array_shift ($stack)) && $d != NULL)
 704     {
 705         $dir = scandir ($d);
 706
 707         foreach ($dir as $node)
 708         {
 709             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 710                 preg_match ('/\.tmp/i', "$node"))
 711                 continue;
 712
 713             if (is_dir ($d . $node))
 714             {
 715                 /* Push new found directory. */
 716                 $stack[] = $d . $node . '/';
 717             }
 718             elseif (is_file ($d . $node))
 719             {
 720                 /* Read async informations. */
 721                 $a = jirafeau_get_async_ref (basename ($node));
 722                 if (!count ($a))
 723                     continue;
 724                 /* Delete transferts older than 1 hour. */
 725                 if (date ('U') - $a['last_edited'] > 3600)
 726                 {
 727                     jirafeau_async_delete (basename ($node));
 728                     $count++;
 729                 }
 730             }
 731         }
 732     }
 733     return $count;
 734 }
 735 /**
 736  * Read async transfert informations
 737  * @return array containing informations.
 738  */
 739 function
 740 jirafeau_get_async_ref ($ref)
 741 {
 742     $out = array ();
 743     $refinfos = VAR_ASYNC . s2p ("$ref") . "$ref";
 744
 745     if (!file_exists ($refinfos))
 746         return $out;
 747
 748     $c = file ($refinfos);
 749     $out['file_name'] = trim ($c[0]);
 750     $out['mime_type'] = trim ($c[1]);
 751     $out['key'] = trim ($c[2], NL);
 752     $out['time'] = trim ($c[3]);
 753     $out['onetime'] = trim ($c[4]);
 754     $out['ip'] = trim ($c[5]);
 755     $out['last_edited'] = trim ($c[6]);
 756     $out['next_code'] = trim ($c[7]);
 757     return $out;
 758 }
 759
 760 /**
 761  * Delete async transfert informations
 762   */
 763 function
 764 jirafeau_async_delete ($ref)
 765 {
 766     $p = s2p ("$ref");
 767     if (file_exists (VAR_ASYNC . $p . $ref))
 768         unlink (VAR_ASYNC . $p . $ref);
 769     if (file_exists (VAR_ASYNC . $p . $ref . '_data'))
 770         unlink (VAR_ASYNC . $p . $ref . '_data');
 771     $parse = VAR_ASYNC . $p;
 772     $scan = array();
 773     while (file_exists ($parse)
 774            && ($scan = scandir ($parse))
 775            && count ($scan) == 2 // '.' and '..' folders => empty.
 776            && basename ($parse) != basename (VAR_ASYNC))
 777     {
 778         rmdir ($parse);
 779         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 780     }
 781 }
 782
 783 /**
 784   * Init a new asynchronous upload.
 785   * @param $finename Name of the file to send
 786   * @param $one_time One time upload parameter
 787   * @param $key eventual password (or blank)
 788   * @param $time time limit
 789   * @param $ip ip address of the client
 790   * @return  a string containing a temporary reference followed by a code or the string "Error"
 791   */
 792 function
 793 jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
 794 {
 795     $res = 'Error';
 796
 797     /* Create temporary folder. */
 798     $ref;
 799     $p;
 800     $code = jirafeau_gen_random (4);
 801     do
 802     {
 803         $ref = jirafeau_gen_random (32);
 804         $p = VAR_ASYNC . s2p ($ref);
 805     } while (file_exists ($p));
 806     @mkdir ($p, 0755, true);
 807     if (!file_exists ($p))
 808     {
 809         echo "Error";
 810         return;
 811     }
 812
 813     /* md5 password or empty */
 814     $password = '';
 815     if (!empty ($key))
 816         $password = md5 ($key);
 817
 818     /* Store informations. */
 819     $p .= $ref;
 820     $handle = fopen ($p, 'w');
 821     fwrite ($handle,
 822             str_replace (NL, '', trim ($filename)) . NL .
 823             str_replace (NL, '', trim ($type)) . NL . $password . NL .
 824             $time . NL . ($one_time ? 'O' : 'R') . NL . $ip . NL .
 825             date ('U') . NL . $code . NL);
 826     fclose ($handle);
 827
 828     return $ref . NL . $code ;
 829 }
 830
 831 /**
 832   * Append a piece of file on the asynchronous upload.
 833   * @param $ref asynchronous upload reference
 834   * @param $file piece of data
 835   * @param $code client code for this operation
 836   * @return  a string containing a next code to use or the string "Error"
 837   */
 838 function
 839 jirafeau_async_push ($ref, $data, $code)
 840 {
 841     /* Get async infos. */
 842     $a = jirafeau_get_async_ref ($ref);
 843
 844     /* Check some errors. */
 845     if (count ($a) == 0
 846         || $a['next_code'] != "$code"
 847         || empty ($data['tmp_name'])
 848         || !is_uploaded_file ($data['tmp_name']))
 849         return "Error";
 850
 851     $p = s2p ($ref);
 852
 853     /* Concatenate data. */
 854     $r = fopen ($data['tmp_name'], 'r');
 855     $w = fopen (VAR_ASYNC . $p . $ref . '_data', 'a');
 856     while (!feof ($r))
 857     {
 858         if (fwrite ($w, fread ($r, 1024)) === false)
 859         {
 860             fclose ($r);
 861             fclose ($w);
 862             jirafeau_async_delete ($ref);
 863             return "Error";
 864         }
 865     }
 866     fclose ($r);
 867     fclose ($w);
 868     unlink ($data['tmp_name']);
 869
 870     /* Update async file. */
 871     $code = jirafeau_gen_random (4);
 872     $handle = fopen (VAR_ASYNC . $p . $ref, 'w');
 873     fwrite ($handle,
 874             $a['file_name'] . NL. $a['mime_type'] . NL. $a['key'] . NL .
 875             $a['time'] . NL . $a['onetime'] . NL . $a['ip'] . NL .
 876             date ('U') . NL . $code . NL);
 877     fclose ($handle);
 878     return $code;
 879 }
 880
 881 /**
 882   * Finalyze an asynchronous upload.
 883   * @param $ref asynchronous upload reference
 884   * @param $code client code for this operation
 885   * @param $crypt boolean asking to crypt or not
 886   * @param $link_name_length link name lenght
 887   * @return  a string containing the download reference followed by a delete code or the string "Error"
 888   */
 889 function
 890 jirafeau_async_end ($ref, $code, $crypt, $link_name_length)
 891 {
 892     /* Get async infos. */
 893     $a = jirafeau_get_async_ref ($ref);
 894     if (count ($a) == 0
 895         || $a['next_code'] != "$code")
 896         return "Error";
 897
 898     /* Generate link infos. */
 899     $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
 900     if (!file_exists($p))
 901         return "Error";
 902
 903     $crypted = false;
 904     $crypt_key = '';
 905     if ($crypt == true && extension_loaded('mcrypt'))
 906     {
 907         $cypt_key = jirafeau_encrypt_file ($p, $p);
 908         if (strlen($crypt_key) > 0)
 909             $crypted = true;
 910     }
 911
 912     $md5 = md5_file ($p);
 913     $size = filesize($p);
 914     $np = s2p ($md5);
 915     $delete_link_code = jirafeau_gen_random (5);
 916
 917     /* File already exist ? */
 918     if (!file_exists (VAR_FILES . $np))
 919         @mkdir (VAR_FILES . $np, 0755, true);
 920     if (!file_exists (VAR_FILES . $np . $md5))
 921         rename ($p, VAR_FILES . $np . $md5);
 922
 923     /* Increment or create count file. */
 924     $counter = 0;
 925     if (file_exists (VAR_FILES . $np . $md5 . '_count'))
 926     {
 927         $content = file (VAR_FILES . $np . $md5. '_count');
 928         $counter = trim ($content[0]);
 929     }
 930     $counter++;
 931     $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
 932     fwrite ($handle, $counter);
 933     fclose ($handle);
 934
 935     /* Create link. */
 936     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
 937     $handle = fopen ($link_tmp_name, 'w');
 938     fwrite ($handle,
 939             $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
 940             $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
 941             date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL . ($crypted ? 'C' : 'O'));
 942     fclose ($handle);
 943     $md5_link = substr(base_16_to_64 (md5_file ($link_tmp_name)), 0, $link_name_length);
 944     $l = s2p ("$md5_link");
 945     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 946         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 947         echo "Error";
 948
 949     /* Clean async upload. */
 950     jirafeau_async_delete ($ref);
 951     return $md5_link . NL . $delete_link_code . NL . urlencode($crypt_key);
 952 }
 953
 954 /**
 955   * Delete a block.
 956   * @param $id identifier of the block.
 957   */
 958 function
 959 jirafeau_block_delete_ ($id)
 960 {
 961     $p = VAR_BLOCK . s2p ($id);
 962     if (!file_exists ($p))
 963         return;
 964
 965     if (file_exists ($p . $id))
 966         unlink ($p . $id);
 967     if (file_exists ($p . $id . '_infos'))
 968         unlink ($p . $id . '_infos');
 969     $parse = $p;
 970     $scan = array();
 971     while (file_exists ($parse)
 972            && ($scan = scandir ($parse))
 973            && count ($scan) == 2 // '.' and '..' folders => empty.
 974            && basename ($parse) != basename (VAR_BLOCK))
 975     {
 976         rmdir ($parse);
 977         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 978     }
 979 }
 980
 981 /**
 982   * Create a file filled with zeros.
 983   * @param $size size of the file.
 984   * @return  a string corresponding to an id or the string "Error"
 985   */
 986 function
 987 jirafeau_block_init ($size)
 988 {
 989     if (!ctype_digit ($size) || $size <= 0)
 990         return "Error";
 991
 992     /* Create folder. */
 993     $id;
 994     do
 995     {
 996         $id = jirafeau_gen_random (32);
 997         $p = VAR_BLOCK . s2p ($id);
 998     } while (file_exists ($p));
 999     @mkdir ($p, 0755, true);
1000     if (!file_exists ($p))
1001     {
1002         echo "Error";
1003         return;
1004     }
1005
1006     /* Create block. */
1007     $p .= $id;
1008     $h = fopen ($p, 'w');
1009     $fill = str_repeat ("\0", 1024);
1010     for ($cnt = 0; $cnt < $size; $cnt += 1024)
1011     {
1012         if ($size - $cnt < 1024)
1013             $fill = str_repeat ("\0", $size - $cnt);
1014         if (fwrite ($h, $fill) === false)
1015         {
1016             fclose ($h);
1017             jirafeau_block_delete_ ($id);
1018             return "Error";
1019         }
1020     }
1021     fclose ($h);
1022
1023     /* Generate a write/delete code. */
1024     $code = jirafeau_gen_random (12);
1025
1026     /* Add block infos. */
1027     if (file_put_contents ($p . '_infos', date ('U') . NL . $size . NL . $code) === FALSE)
1028     {
1029         jirafeau_block_delete_ ($id);
1030         return "Error";
1031     }
1032
1033     return $id . NL . $code;
1034 }
1035
1036 /** Get block size in bytes.
1037   * @param $id identifier of the block
1038   * @return  block size in bytes
1039   */
1040 function
1041 jirafeau_block_get_size ($id)
1042 {
1043     $p = VAR_BLOCK . s2p ($id) . $id;
1044     if (!file_exists ($p))
1045         return "Error";
1046
1047     /* Check date. */
1048     $f = file ($p . '_infos');
1049     $date = trim ($f[0]);
1050     $block_size = trim ($f[1]);
1051     $stored_code = trim ($f[2]);
1052     /* Update date. */
1053     if (date ('U') - $date > JIRAFEAU_HOUR
1054         && date ('U') - $date < JIRAFEAU_MONTH)
1055     {
1056         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1057         {
1058             jirafeau_block_delete_ ($id);
1059             return "Error";
1060         }
1061     }
1062     /* Remove data. */
1063     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1064     {
1065         echo date ('U'). " $date ";
1066         jirafeau_block_delete_ ($id);
1067         return "Error";
1068     }
1069
1070     return $block_size;
1071 }
1072
1073 /**
1074   * Read some data in a block.
1075   * @param $id identifier of the block
1076   * @param $start where to read data (starting from zero).
1077   * @param $length length to read.
1078   * @return  echo data
1079   */
1080 function
1081 jirafeau_block_read ($id, $start, $length)
1082 {
1083     if (!ctype_digit ($start) || $start < 0
1084         || !ctype_digit ($length) || $length <= 0)
1085     {
1086         echo "Error";
1087         return;
1088     }
1089
1090     $p = VAR_BLOCK . s2p ($id) . $id;
1091     if (!file_exists ($p))
1092     {
1093         echo "Error";
1094         return;
1095     }
1096
1097     /* Check date. */
1098     $f = file ($p . '_infos');
1099     $date = trim ($f[0]);
1100     $block_size = trim ($f[1]);
1101     $stored_code = trim ($f[2]);
1102     /* Update date. */
1103     if (date ('U') - $date > JIRAFEAU_HOUR
1104         && date ('U') - $date < JIRAFEAU_MONTH)
1105     {
1106         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1107         {
1108             jirafeau_block_delete_ ($id);
1109             echo "Error";
1110             return;
1111         }
1112     }
1113     /* Remove data. */
1114     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1115     {
1116         echo date ('U'). " $date ";
1117         jirafeau_block_delete_ ($id);
1118         echo "Error";
1119         return;
1120     }
1121
1122     if ($start + $length > $block_size)
1123     {
1124         echo "Error";
1125         return;
1126     }
1127
1128     /* Read content. */
1129     header ('Content-Length: ' . $length);
1130     header ('Content-Disposition: attachment');
1131
1132     $r = fopen ($p, 'r');
1133     if (fseek ($r, $start) != 0)
1134     {
1135         echo "Error";
1136         return;
1137     }
1138     $c = 1024;
1139     for ($cnt = 0; $cnt < $length && !feof ($r); $cnt += 1024)
1140     {
1141         if ($length - $cnt < 1024)
1142             $c = $length - $cnt;
1143         print fread ($r, $c);
1144         ob_flush();
1145     }
1146     fclose ($r);
1147 }
1148
1149 /**
1150   * Write some data in a block.
1151   * @param $id identifier of the block
1152   * @param $start where to writing data (starting from zero).
1153   * @param $data data to write.
1154   * @param $code code to allow writing.
1155   * @return  string "Ok" or string "Error".
1156   */
1157 function
1158 jirafeau_block_write ($id, $start, $data, $code)
1159 {
1160     if (!ctype_digit ($start) || $start < 0
1161         || strlen ($code) == 0)
1162         return "Error";
1163
1164     $p = VAR_BLOCK . s2p ($id) . $id;
1165     if (!file_exists ($p))
1166         return "Error";
1167
1168     /* Check date. */
1169     $f = file ($p . '_infos');
1170     $date = trim ($f[0]);
1171     $block_size = trim ($f[1]);
1172     $stored_code = trim ($f[2]);
1173     /* Update date. */
1174     if (date ('U') - $date > JIRAFEAU_HOUR
1175         && date ('U') - $date < JIRAFEAU_MONTH)
1176     {
1177         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1178         {
1179             jirafeau_block_delete_ ($id);
1180             return "Error";
1181         }
1182     }
1183     /* Remove data. */
1184     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1185     {
1186         jirafeau_block_delete_ ($id);
1187         return "Error";
1188     }
1189
1190     /* Check code. */
1191     if ($stored_code != $code)
1192     {
1193         echo "Error";
1194         return;
1195     }
1196
1197     /* Check data. */
1198     $size = $data['size'];
1199     if ($size <= 0)
1200         return "Error";
1201     if ($start + $size > $block_size)
1202         return "Error";
1203
1204     /* Open data. */
1205     $r = fopen ($data['tmp_name'], 'r');
1206
1207     /* Open Block. */
1208     $w = fopen ($p, 'r+');
1209     if (fseek ($w, $start) != 0)
1210         return "Error";
1211
1212     /* Write content. */
1213     $c = 1024;
1214     for ($cnt = 0; $cnt <= $size && !feof ($w); $cnt += 1024)
1215     {
1216         if ($size - $cnt < 1024)
1217             $c = $size - $cnt;
1218         $d = fread ($r, $c);
1219         fwrite ($w, $d);
1220     }
1221     fclose ($r);
1222     fclose ($w);
1223     unlink ($data['tmp_name']);
1224     return "Ok";
1225 }
1226
1227 /**
1228   * Delete a block.
1229   * @param $id identifier of the block.
1230   * @param $code code to allow writing.
1231   * @return  string "Ok" or string "Error".
1232   */
1233 function
1234 jirafeau_block_delete ($id, $code)
1235 {
1236     $p = VAR_BLOCK . s2p ($id) . $id;
1237
1238     if (!file_exists ($p))
1239         return "Error";
1240
1241     $f = file ($p . '_infos');
1242     $date = trim ($f[0]);
1243     $block_size = trim ($f[1]);
1244     $stored_code = trim ($f[2]);
1245
1246     if ($code != $stored_code)
1247         return "Error";
1248
1249     jirafeau_block_delete_ ($id);
1250     return "Ok";
1251 }
1252
1253 /**
1254  * Clean old unused blocks.
1255  * @return number of cleaned blocks.
1256  */
1257 function
1258 jirafeau_admin_clean_block ()
1259 {
1260     $count = 0;
1261     /* Get all blocks. */
1262     $stack = array (VAR_BLOCK);
1263     while (($d = array_shift ($stack)) && $d != NULL)
1264     {
1265         $dir = scandir ($d);
1266
1267         foreach ($dir as $node)
1268         {
1269             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0)
1270                 continue;
1271
1272             if (is_dir ($d . $node))
1273             {
1274                 /* Push new found directory. */
1275                 $stack[] = $d . $node . '/';
1276             }
1277             elseif (is_file ($d . $node) && preg_match ('/\_infos/i', "$node"))
1278             {
1279                 /* Read block informations. */
1280                 $f = file ($d . $node);
1281                 $date = trim ($f[0]);
1282                 $block_size = trim ($f[1]);
1283                 if (date ('U') - $date >= JIRAFEAU_MONTH)
1284                 {
1285                     jirafeau_block_delete_ (substr($node, 0, -6));
1286                     $count++;
1287                 }
1288             }
1289         }
1290     }
1291     return $count;
1292 }
1293
1294 function
1295 jirafeau_crypt_create_iv($base, $size)
1296 {
1297     $iv = '';
1298     while (strlen ($iv) < $size)
1299         $iv = $iv . $base;
1300     $iv = substr($iv, 0, $size);
1301     return $iv;
1302 }
1303
1304 /**
1305  * Crypt file and returns decrypt key.
1306  * @param $fp_src file path to the file to crypt.
1307  * @param $fp_dst file path to the file to write crypted file (could be the same).
1308  * @return decrypt key composed of the key and the iv separated by a point ('.')
1309  */
1310 function
1311 jirafeau_encrypt_file ($fp_src, $fp_dst)
1312 {
1313     $fs = filesize ($fp_src);
1314     if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
1315         return '';
1316
1317     /* Prepare module. */
1318     $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
1319     /* Generate key. */
1320     $crypt_key = jirafeau_gen_random (10);
1321     $md5_key = md5($crypt_key);
1322     $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
1323     /* Init module. */
1324     mcrypt_generic_init($m, $md5_key, $iv);
1325     /* Crypt file. */
1326     $r = fopen ($fp_src, 'r');
1327     $w = fopen ($fp_dst, 'c');
1328     while (!feof ($r))
1329     {
1330         $enc = mcrypt_generic($m, fread ($r, 1024));
1331         if (fwrite ($w, $enc) === false)
1332             return '';
1333     }
1334     fclose ($r);
1335     fclose ($w);
1336     /* Cleanup. */
1337     mcrypt_generic_deinit($m);
1338     mcrypt_module_close($m);
1339     return $crypt_key;
1340 }
1341
1342 /**
1343  * Decrypt file.
1344  * @param $fp_src file path to the file to decrypt.
1345  * @param $fp_dst file path to the file to write decrypted file (could be the same).
1346  * @param $k string composed of the key and the iv separated by a point ('.')
1347  * @return key used to decrypt. a string of length 0 is returned if failed.
1348  */
1349 function
1350 jirafeau_decrypt_file ($fp_src, $fp_dst, $k)
1351 {
1352     $fs = filesize ($fp_src);
1353     if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
1354         return false;
1355
1356     /* Init module */
1357     $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
1358     /* Extract key and iv. */
1359     $crypt_key = $k;
1360     $md5_key = md5($crypt_key);
1361     $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
1362     /* Decrypt file. */
1363     $r = fopen ($fp_src, 'r');
1364     $w = fopen ($fp_dst, 'c');
1365     while (!feof ($r))
1366     {
1367         $dec = mdecrypt_generic($m, fread ($r, 1024));
1368         if (fwrite ($w, $dec) === false)
1369             return false;
1370     }
1371     fclose ($r);
1372     fclose ($w);
1373     /* Cleanup. */
1374     mcrypt_generic_deinit($m);
1375     mcrypt_module_close($m);
1376     return true;
1377 }
1378
1379 ?>