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 $code;
  91 }
  92
  93 function is_ssl() {
  94     if ( isset($_SERVER['HTTPS']) ) {
  95         if ( 'on' == strtolower($_SERVER['HTTPS']) )
  96             return true;
  97         if ( '1' == $_SERVER['HTTPS'] )
  98             return true;
  99     } elseif ( isset($_SERVER['SERVER_PORT']) && ( '443' == $_SERVER['SERVER_PORT'] ) ) {
 100         return true;
 101     }
 102     return false;
 103 }
 104
 105 function
 106 jirafeau_human_size ($octets)
 107 {
 108     $u = array ('B', 'KB', 'MB', 'GB', 'TB');
 109     $o = max ($octets, 0);
 110     $p = min (floor (($o ? log ($o) : 0) / log (1024)), count ($u) - 1);
 111     $o /= pow (1024, $p);
 112     return round ($o, 1) . $u[$p];
 113 }
 114
 115 function
 116 jirafeau_clean_rm_link ($link)
 117 {
 118     $p = s2p ("$link");
 119     if (file_exists (VAR_LINKS . $p . $link))
 120         unlink (VAR_LINKS . $p . $link);
 121     $parse = VAR_LINKS . $p;
 122     $scan = array();
 123     while (file_exists ($parse)
 124            && ($scan = scandir ($parse))
 125            && count ($scan) == 2 // '.' and '..' folders => empty.
 126            && basename ($parse) != basename (VAR_LINKS))
 127     {
 128         rmdir ($parse);
 129         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 130     }
 131 }
 132
 133 function
 134 jirafeau_clean_rm_file ($md5)
 135 {
 136     $p = s2p ("$md5");
 137     $f = VAR_FILES . $p . $md5;
 138     if (file_exists ($f) && is_file ($f))
 139         unlink ($f);
 140     if (file_exists ($f . '_count') && is_file ($f . '_count'))
 141         unlink ($f . '_count');
 142     $parse = VAR_FILES . $p;
 143     $scan = array();
 144     while (file_exists ($parse)
 145            && ($scan = scandir ($parse))
 146            && count ($scan) == 2 // '.' and '..' folders => empty.
 147            && basename ($parse) != basename (VAR_FILES))
 148     {
 149         rmdir ($parse);
 150         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 151     }
 152 }
 153
 154 /**
 155  * transforms a php.ini string representing a value in an integer
 156  * @param $value the value from php.ini
 157  * @returns an integer for this value
 158  */
 159 function jirafeau_ini_to_bytes ($value)
 160 {
 161     $modifier = substr ($value, -1);
 162     $bytes = substr ($value, 0, -1);
 163     switch (strtoupper ($modifier))
 164     {
 165     case 'P':
 166         $bytes *= 1024;
 167     case 'T':
 168         $bytes *= 1024;
 169     case 'G':
 170         $bytes *= 1024;
 171     case 'M':
 172         $bytes *= 1024;
 173     case 'K':
 174         $bytes *= 1024;
 175     default:
 176         break;
 177     }
 178     return $bytes;
 179 }
 180
 181 /**
 182  * gets the maximum upload size according to php.ini
 183  * @returns the maximum upload size in bytes
 184  */
 185 function
 186 jirafeau_get_max_upload_size_bytes ()
 187 {
 188     return min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
 189                 jirafeau_ini_to_bytes (ini_get ('upload_max_filesize')));
 190 }
 191
 192 /**
 193  * gets the maximum upload size according to php.ini
 194  * @returns the maximum upload size string
 195  */
 196 function
 197 jirafeau_get_max_upload_size ()
 198 {
 199     return jirafeau_human_size(
 200             min (jirafeau_ini_to_bytes (ini_get ('post_max_size')),
 201                  jirafeau_ini_to_bytes (ini_get ('upload_max_filesize'))));
 202 }
 203
 204 /**
 205  * gets a string explaining the error
 206  * @param $code the error code
 207  * @returns a string explaining the error
 208  */
 209 function
 210 jirafeau_upload_errstr ($code)
 211 {
 212     switch ($code)
 213     {
 214     case UPLOAD_ERR_INI_SIZE:
 215     case UPLOAD_ERR_FORM_SIZE:
 216         return t('Your file exceeds the maximum authorized file size. ');
 217         break;
 218
 219     case UPLOAD_ERR_PARTIAL:
 220     case UPLOAD_ERR_NO_FILE:
 221         return
 222             t
 223             ('Your file was not uploaded correctly. You may succeed in retrying. ');
 224         break;
 225
 226     case UPLOAD_ERR_NO_TMP_DIR:
 227     case UPLOAD_ERR_CANT_WRITE:
 228     case UPLOAD_ERR_EXTENSION:
 229         return t('Internal error. You may not succeed in retrying. ');
 230         break;
 231
 232     default:
 233         break;
 234     }
 235     return t('Unknown error. ');
 236 }
 237
 238 /** Remove link and it's file
 239  * @param $link the link's name (hash)
 240  */
 241
 242 function
 243 jirafeau_delete_link ($link)
 244 {
 245     $l = jirafeau_get_link ($link);
 246     if (!count ($l))
 247         return;
 248
 249     jirafeau_clean_rm_link ($link);
 250
 251     $md5 = $l['md5'];
 252     $p = s2p ("$md5");
 253
 254     $counter = 1;
 255     if (file_exists (VAR_FILES . $p . $md5. '_count'))
 256     {
 257         $content = file (VAR_FILES . $p . $md5. '_count');
 258         $counter = trim ($content[0]);
 259     }
 260     $counter--;
 261
 262     if ($counter >= 1)
 263     {
 264         $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 265         fwrite ($handle, $counter);
 266         fclose ($handle);
 267     }
 268
 269     if ($counter == 0)
 270         jirafeau_clean_rm_file ($md5);
 271 }
 272
 273 /**
 274  * Delete a file and it's links.
 275  */
 276 function
 277 jirafeau_delete_file ($md5)
 278 {
 279     $count = 0;
 280     /* Get all links files. */
 281     $stack = array (VAR_LINKS);
 282     while (($d = array_shift ($stack)) && $d != NULL)
 283     {
 284         $dir = scandir ($d);
 285
 286         foreach ($dir as $node)
 287         {
 288             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 289                 preg_match ('/\.tmp/i', "$node"))
 290                 continue;
 291
 292             if (is_dir ($d . $node))
 293             {
 294                 /* Push new found directory. */
 295                 $stack[] = $d . $node . '/';
 296             }
 297             elseif (is_file ($d . $node))
 298             {
 299                 /* Read link informations. */
 300                 $l = jirafeau_get_link (basename ($node));
 301                 if (!count ($l))
 302                     continue;
 303                 if ($l['md5'] == $md5)
 304                 {
 305                     $count++;
 306                     jirafeau_delete_link ($node);
 307                 }
 308             }
 309         }
 310     }
 311     jirafeau_clean_rm_file ($md5);
 312     return $count;
 313 }
 314
 315 /**
 316  * handles an uploaded file
 317  * @param $file the file struct given by $_FILE[]
 318  * @param $one_time_download is the file a one time download ?
 319  * @param $key if not empty, protect the file with this key
 320  * @param $time the time of validity of the file
 321  * @param $ip uploader's ip
 322  * @param $crypt boolean asking to crypt or not
 323  * @param $link_name_length size of the link name
 324  * @returns an array containing some information
 325  *   'error' => information on possible errors
 326  *   'link' => the link name of the uploaded file
 327  *   'delete_link' => the link code to delete file
 328  */
 329 function
 330 jirafeau_upload ($file, $one_time_download, $key, $time, $ip, $crypt, $link_name_length)
 331 {
 332     if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
 333     {
 334         return (array(
 335                  'error' =>
 336                    array ('has_error' => true,
 337                           'why' => jirafeau_upload_errstr ($file['error'])),
 338                  'link' => '',
 339                  'delete_link' => ''));
 340     }
 341
 342     /* array representing no error */
 343     $noerr = array ('has_error' => false, 'why' => '');
 344
 345     /* Crypt file if option is enabled. */
 346     $crypted = false;
 347     $crypt_key = '';
 348     if ($crypt == true && extension_loaded('mcrypt'))
 349     {
 350         $crypt_key = jirafeau_encrypt_file ($file['tmp_name'], $file['tmp_name']);
 351         if (strlen($crypt_key) > 0)
 352             $crypted = true;
 353     }
 354
 355     /* file informations */
 356     $md5 = md5_file ($file['tmp_name']);
 357     $name = str_replace (NL, '', trim ($file['name']));
 358     $mime_type = $file['type'];
 359     $size = $file['size'];
 360
 361     /* does file already exist ? */
 362     $rc = false;
 363     $p = s2p ("$md5");
 364     if (file_exists (VAR_FILES . $p .  $md5))
 365     {
 366         $rc = unlink ($file['tmp_name']);
 367     }
 368     elseif ((file_exists (VAR_FILES . $p) || @mkdir (VAR_FILES . $p, 0755, true))
 369             && move_uploaded_file ($file['tmp_name'], VAR_FILES . $p . $md5))
 370     {
 371         $rc = true;
 372     }
 373     if (!$rc)
 374     {
 375         return (array(
 376                  'error' =>
 377                    array ('has_error' => true,
 378                           'why' => t('Internal error during file creation.')),
 379                  'link' =>'',
 380                  'delete_link' => ''));
 381     }
 382
 383     /* Increment or create count file. */
 384     $counter = 0;
 385     if (file_exists (VAR_FILES . $p . $md5 . '_count'))
 386     {
 387         $content = file (VAR_FILES . $p . $md5. '_count');
 388         $counter = trim ($content[0]);
 389     }
 390     $counter++;
 391     $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 392     fwrite ($handle, $counter);
 393     fclose ($handle);
 394
 395     /* Create delete code. */
 396     $delete_link_code = jirafeau_gen_random (5);
 397
 398     /* md5 password or empty. */
 399     $password = '';
 400     if (!empty ($key))
 401         $password = md5 ($key);
 402
 403     /* create link file */
 404     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . '.tmp';
 405     $handle = fopen ($link_tmp_name, 'w');
 406     fwrite ($handle,
 407             $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
 408             NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .
 409             NL . $ip . NL. $delete_link_code . NL . ($crypted ? 'C' : 'O'));
 410     fclose ($handle);
 411     $md5_link = substr(base_16_to_64 (md5_file ($link_tmp_name)), 0, $link_name_length);
 412     $l = s2p ("$md5_link");
 413     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 414         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 415     {
 416         if (file_exists ($link_tmp_name))
 417             unlink ($link_tmp_name);
 418
 419         $counter--;
 420         if ($counter >= 1)
 421         {
 422             $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 423             fwrite ($handle, $counter);
 424             fclose ($handle);
 425         }
 426         else
 427         {
 428             jirafeau_clean_rm_file ($md5_link);
 429         }
 430         return (array(
 431                  'error' =>
 432                    array ('has_error' => true,
 433                           'why' => t('Internal error during file creation. ')),
 434                  'link' =>'',
 435                  'delete_link' => ''));
 436     }
 437    return (array ('error' => $noerr,
 438                   'link' => $md5_link,
 439                   'delete_link' => $delete_link_code,
 440                   'crypt_key' => $crypt_key));
 441 }
 442
 443 /**
 444  * tells if a mime-type is viewable in a browser
 445  * @param $mime the mime type
 446  * @returns a boolean telling if a mime type is viewable
 447  */
 448 function
 449 jirafeau_is_viewable ($mime)
 450 {
 451     if (!empty ($mime))
 452     {
 453         /* Actually, verify if mime-type is an image or a text. */
 454         $viewable = array ('image', 'text');
 455         $decomposed = explode ('/', $mime);
 456         return in_array ($decomposed[0], $viewable);
 457     }
 458     return false;
 459 }
 460
 461 // Error handling functions.
 462 //! Global array that contains all registered errors.
 463 $error_list = array ();
 464
 465 /**
 466  * Adds an error to the list of errors.
 467  * @param $title the error's title
 468  * @param $description is a human-friendly description of the problem.
 469  */
 470 function
 471 add_error ($title, $description)
 472 {
 473     global $error_list;
 474     $error_list[] = '<p>' . $title. '<br />' . $description. '</p>';
 475 }
 476
 477 /**
 478  * Informs whether any error has been registered yet.
 479  * @return true if there are errors.
 480  */
 481 function
 482 has_error ()
 483 {
 484     global $error_list;
 485     return !empty ($error_list);
 486 }
 487
 488 /**
 489  * Displays all the errors.
 490  */
 491 function
 492 show_errors ()
 493 {
 494     if (has_error ())
 495     {
 496         global $error_list;
 497         echo '<div class="error">';
 498         foreach ($error_list as $error)
 499         {
 500             echo $error;
 501         }
 502         echo '</div>';
 503     }
 504 }
 505
 506 function check_errors ($cfg)
 507 {
 508     if (file_exists (JIRAFEAU_ROOT . 'install.php')
 509         && !($cfg['installation_done'] === true))
 510     {
 511         header('Location: install.php');
 512         exit;
 513     }
 514
 515     /* check if the destination dirs are writable */
 516     $writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
 517
 518     /* Checking for errors. */
 519     if (!is_writable (VAR_FILES))
 520         add_error (t('The file directory is not writable!'), VAR_FILES);
 521
 522     if (!is_writable (VAR_LINKS))
 523         add_error (t('The link directory is not writable!'), VAR_LINKS);
 524
 525     if (!is_writable (VAR_ASYNC))
 526         add_error (t('The async directory is not writable!'), VAR_ASYNC);
 527
 528      if (!is_writable (VAR_BLOCK))
 529         add_error (t('The block directory is not writable!'), VAR_BLOCK);
 530 }
 531
 532 /**
 533  * Read link informations
 534  * @return array containing informations.
 535  */
 536 function
 537 jirafeau_get_link ($hash)
 538 {
 539     $out = array ();
 540     $link = VAR_LINKS . s2p ("$hash") . $hash;
 541
 542     if (!file_exists ($link))
 543         return $out;
 544
 545     $c = file ($link);
 546     $out['file_name'] = trim ($c[0]);
 547     $out['mime_type'] = trim ($c[1]);
 548     $out['file_size'] = trim ($c[2]);
 549     $out['key'] = trim ($c[3], NL);
 550     $out['time'] = trim ($c[4]);
 551     $out['md5'] = trim ($c[5]);
 552     $out['onetime'] = trim ($c[6]);
 553     $out['upload_date'] = trim ($c[7]);
 554     $out['ip'] = trim ($c[8]);
 555     $out['link_code'] = trim ($c[9]);
 556     if (trim ($c[10]) == 'C')
 557             $out['crypted'] = true;
 558     else
 559             $out['crypted'] = false;
 560
 561     return $out;
 562 }
 563
 564 /**
 565  * List files in admin interface.
 566  */
 567 function
 568 jirafeau_admin_list ($name, $file_hash, $link_hash)
 569 {
 570     echo '<fieldset><legend>';
 571     if (!empty ($name))
 572         echo t('Filename') . ": $name ";
 573     if (!empty ($file_hash))
 574         echo t('file') . ": $file_hash ";
 575     if (!empty ($link_hash))
 576         echo t('link') . ": $link_hash ";
 577     if (empty ($name) && empty ($file_hash) && empty ($link_hash))
 578         echo t('List all files');
 579     echo '</legend>';
 580     echo '<table>';
 581     echo '<tr>';
 582     echo '<td>' . t('Filename') . '</td>';
 583     echo '<td>' . t('Type') . '</td>';
 584     echo '<td>' . t('Size') . '</td>';
 585     echo '<td>' . t('Expire') . '</td>';
 586     echo '<td>' . t('Onetime') . '</td>';
 587     echo '<td>' . t('Upload date') . '</td>';
 588     echo '<td>' . t('Origin') . '</td>';
 589     echo '<td>' . t('Action') . '</td>';
 590     echo '</tr>';
 591
 592     /* Get all links files. */
 593     $stack = array (VAR_LINKS);
 594     while (($d = array_shift ($stack)) && $d != NULL)
 595     {
 596         $dir = scandir ($d);
 597         foreach ($dir as $node)
 598         {
 599             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 600                 preg_match ('/\.tmp/i', "$node"))
 601                 continue;
 602             if (is_dir ($d . $node))
 603             {
 604                 /* Push new found directory. */
 605                 $stack[] = $d . $node . '/';
 606             }
 607             elseif (is_file ($d . $node))
 608             {
 609                 /* Read link informations. */
 610                 $l = jirafeau_get_link ($node);
 611                 if (!count ($l))
 612                     continue;
 613
 614                 /* Filter. */
 615                 if (!empty ($name) && !preg_match ("/$name/i", $l['file_name']))
 616                     continue;
 617                 if (!empty ($file_hash) && $file_hash != $l['md5'])
 618                     continue;
 619                 if (!empty ($link_hash) && $link_hash != $node)
 620                     continue;
 621                 /* Print link informations. */
 622                 echo '<tr>';
 623                 echo '<td>' .
 624                 '<form action = "admin.php" method = "post">' .
 625                 '<input type = "hidden" name = "action" value = "download"/>' .
 626                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 627                 '<input type = "submit" value = "' . $l['file_name'] . '" />' .
 628                 '</form>';
 629                 echo '</td>';
 630                 echo '<td>' . $l['mime_type'] . '</td>';
 631                 echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
 632                 echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
 633                      '</td>';
 634                 echo '<td>' . $l['onetime'] . '</td>';
 635                 echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
 636                 echo '<td>' . $l['ip'] . '</td>';
 637                 echo '<td>' .
 638                 '<form action = "admin.php" method = "post">' .
 639                 '<input type = "hidden" name = "action" value = "delete_link"/>' .
 640                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 641                 '<input type = "submit" value = "' . t('Del link') . '" />' .
 642                 '</form>' .
 643                 '<form action = "admin.php" method = "post">' .
 644                 '<input type = "hidden" name = "action" value = "delete_file"/>' .
 645                 '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
 646                 '<input type = "submit" value = "' . t('Del file and links') . '" />' .
 647                 '</form>' .
 648                 '</td>';
 649                 echo '</tr>';
 650             }
 651         }
 652     }
 653     echo '</table></fieldset>';
 654 }
 655
 656 /**
 657  * Clean expired files.
 658  * @return number of cleaned files.
 659  */
 660 function
 661 jirafeau_admin_clean ()
 662 {
 663     $count = 0;
 664     /* Get all links files. */
 665     $stack = array (VAR_LINKS);
 666     while (($d = array_shift ($stack)) && $d != NULL)
 667     {
 668         $dir = scandir ($d);
 669
 670         foreach ($dir as $node)
 671         {
 672             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 673                 preg_match ('/\.tmp/i', "$node"))
 674                 continue;
 675
 676             if (is_dir ($d . $node))
 677             {
 678                 /* Push new found directory. */
 679                 $stack[] = $d . $node . '/';
 680             }
 681             elseif (is_file ($d . $node))
 682             {
 683                 /* Read link informations. */
 684                 $l = jirafeau_get_link (basename ($node));
 685                 if (!count ($l))
 686                     continue;
 687                 $p = s2p ($l['md5']);
 688                 if ($l['time'] > 0 && $l['time'] < time () || // expired
 689                     !file_exists (VAR_FILES . $p . $l['md5']) || // invalid
 690                     !file_exists (VAR_FILES . $p . $l['md5'] . '_count')) // invalid
 691                 {
 692                     jirafeau_delete_link ($node);
 693                     $count++;
 694                 }
 695             }
 696         }
 697     }
 698     return $count;
 699 }
 700
 701
 702 /**
 703  * Clean old async transferts.
 704  * @return number of cleaned files.
 705  */
 706 function
 707 jirafeau_admin_clean_async ()
 708 {
 709     $count = 0;
 710     /* Get all links files. */
 711     $stack = array (VAR_ASYNC);
 712     while (($d = array_shift ($stack)) && $d != NULL)
 713     {
 714         $dir = scandir ($d);
 715
 716         foreach ($dir as $node)
 717         {
 718             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 719                 preg_match ('/\.tmp/i', "$node"))
 720                 continue;
 721
 722             if (is_dir ($d . $node))
 723             {
 724                 /* Push new found directory. */
 725                 $stack[] = $d . $node . '/';
 726             }
 727             elseif (is_file ($d . $node))
 728             {
 729                 /* Read async informations. */
 730                 $a = jirafeau_get_async_ref (basename ($node));
 731                 if (!count ($a))
 732                     continue;
 733                 /* Delete transferts older than 1 hour. */
 734                 if (date ('U') - $a['last_edited'] > 3600)
 735                 {
 736                     jirafeau_async_delete (basename ($node));
 737                     $count++;
 738                 }
 739             }
 740         }
 741     }
 742     return $count;
 743 }
 744 /**
 745  * Read async transfert informations
 746  * @return array containing informations.
 747  */
 748 function
 749 jirafeau_get_async_ref ($ref)
 750 {
 751     $out = array ();
 752     $refinfos = VAR_ASYNC . s2p ("$ref") . "$ref";
 753
 754     if (!file_exists ($refinfos))
 755         return $out;
 756
 757     $c = file ($refinfos);
 758     $out['file_name'] = trim ($c[0]);
 759     $out['mime_type'] = trim ($c[1]);
 760     $out['key'] = trim ($c[2], NL);
 761     $out['time'] = trim ($c[3]);
 762     $out['onetime'] = trim ($c[4]);
 763     $out['ip'] = trim ($c[5]);
 764     $out['last_edited'] = trim ($c[6]);
 765     $out['next_code'] = trim ($c[7]);
 766     return $out;
 767 }
 768
 769 /**
 770  * Delete async transfert informations
 771   */
 772 function
 773 jirafeau_async_delete ($ref)
 774 {
 775     $p = s2p ("$ref");
 776     if (file_exists (VAR_ASYNC . $p . $ref))
 777         unlink (VAR_ASYNC . $p . $ref);
 778     if (file_exists (VAR_ASYNC . $p . $ref . '_data'))
 779         unlink (VAR_ASYNC . $p . $ref . '_data');
 780     $parse = VAR_ASYNC . $p;
 781     $scan = array();
 782     while (file_exists ($parse)
 783            && ($scan = scandir ($parse))
 784            && count ($scan) == 2 // '.' and '..' folders => empty.
 785            && basename ($parse) != basename (VAR_ASYNC))
 786     {
 787         rmdir ($parse);
 788         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 789     }
 790 }
 791
 792 /**
 793   * Init a new asynchronous upload.
 794   * @param $finename Name of the file to send
 795   * @param $one_time One time upload parameter
 796   * @param $key eventual password (or blank)
 797   * @param $time time limit
 798   * @param $ip ip address of the client
 799   * @return  a string containing a temporary reference followed by a code or the string "Error"
 800   */
 801 function
 802 jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
 803 {
 804     $res = 'Error';
 805
 806     /* Create temporary folder. */
 807     $ref;
 808     $p;
 809     $code = jirafeau_gen_random (4);
 810     do
 811     {
 812         $ref = jirafeau_gen_random (32);
 813         $p = VAR_ASYNC . s2p ($ref);
 814     } while (file_exists ($p));
 815     @mkdir ($p, 0755, true);
 816     if (!file_exists ($p))
 817     {
 818         echo "Error";
 819         return;
 820     }
 821
 822     /* md5 password or empty */
 823     $password = '';
 824     if (!empty ($key))
 825         $password = md5 ($key);
 826
 827     /* Store informations. */
 828     $p .= $ref;
 829     $handle = fopen ($p, 'w');
 830     fwrite ($handle,
 831             str_replace (NL, '', trim ($filename)) . NL .
 832             str_replace (NL, '', trim ($type)) . NL . $password . NL .
 833             $time . NL . ($one_time ? 'O' : 'R') . NL . $ip . NL .
 834             date ('U') . NL . $code . NL);
 835     fclose ($handle);
 836
 837     return $ref . NL . $code ;
 838 }
 839
 840 /**
 841   * Append a piece of file on the asynchronous upload.
 842   * @param $ref asynchronous upload reference
 843   * @param $file piece of data
 844   * @param $code client code for this operation
 845   * @return  a string containing a next code to use or the string "Error"
 846   */
 847 function
 848 jirafeau_async_push ($ref, $data, $code)
 849 {
 850     /* Get async infos. */
 851     $a = jirafeau_get_async_ref ($ref);
 852
 853     /* Check some errors. */
 854     if (count ($a) == 0
 855         || $a['next_code'] != "$code"
 856         || empty ($data['tmp_name'])
 857         || !is_uploaded_file ($data['tmp_name']))
 858         return "Error";
 859
 860     $p = s2p ($ref);
 861
 862     /* Concatenate data. */
 863     $r = fopen ($data['tmp_name'], 'r');
 864     $w = fopen (VAR_ASYNC . $p . $ref . '_data', 'a');
 865     while (!feof ($r))
 866     {
 867         if (fwrite ($w, fread ($r, 1024)) === false)
 868         {
 869             fclose ($r);
 870             fclose ($w);
 871             jirafeau_async_delete ($ref);
 872             return "Error";
 873         }
 874     }
 875     fclose ($r);
 876     fclose ($w);
 877     unlink ($data['tmp_name']);
 878
 879     /* Update async file. */
 880     $code = jirafeau_gen_random (4);
 881     $handle = fopen (VAR_ASYNC . $p . $ref, 'w');
 882     fwrite ($handle,
 883             $a['file_name'] . NL. $a['mime_type'] . NL. $a['key'] . NL .
 884             $a['time'] . NL . $a['onetime'] . NL . $a['ip'] . NL .
 885             date ('U') . NL . $code . NL);
 886     fclose ($handle);
 887     return $code;
 888 }
 889
 890 /**
 891   * Finalyze an asynchronous upload.
 892   * @param $ref asynchronous upload reference
 893   * @param $code client code for this operation
 894   * @param $crypt boolean asking to crypt or not
 895   * @param $link_name_length link name lenght
 896   * @return  a string containing the download reference followed by a delete code or the string "Error"
 897   */
 898 function
 899 jirafeau_async_end ($ref, $code, $crypt, $link_name_length)
 900 {
 901     /* Get async infos. */
 902     $a = jirafeau_get_async_ref ($ref);
 903     if (count ($a) == 0
 904         || $a['next_code'] != "$code")
 905         return "Error";
 906
 907     /* Generate link infos. */
 908     $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
 909     if (!file_exists($p))
 910         return "Error";
 911
 912     $crypted = false;
 913     $crypt_key = '';
 914     if ($crypt == true && extension_loaded('mcrypt'))
 915     {
 916         $crypt_key = jirafeau_encrypt_file ($p, $p);
 917         if (strlen($crypt_key) > 0)
 918             $crypted = true;
 919     }
 920
 921     $md5 = md5_file ($p);
 922     $size = filesize($p);
 923     $np = s2p ($md5);
 924     $delete_link_code = jirafeau_gen_random (5);
 925
 926     /* File already exist ? */
 927     if (!file_exists (VAR_FILES . $np))
 928         @mkdir (VAR_FILES . $np, 0755, true);
 929     if (!file_exists (VAR_FILES . $np . $md5))
 930         rename ($p, VAR_FILES . $np . $md5);
 931
 932     /* Increment or create count file. */
 933     $counter = 0;
 934     if (file_exists (VAR_FILES . $np . $md5 . '_count'))
 935     {
 936         $content = file (VAR_FILES . $np . $md5. '_count');
 937         $counter = trim ($content[0]);
 938     }
 939     $counter++;
 940     $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
 941     fwrite ($handle, $counter);
 942     fclose ($handle);
 943
 944     /* Create link. */
 945     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . '.tmp';
 946     $handle = fopen ($link_tmp_name, 'w');
 947     fwrite ($handle,
 948             $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
 949             $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
 950             date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL . ($crypted ? 'C' : 'O'));
 951     fclose ($handle);
 952     $md5_link = substr(base_16_to_64 (md5_file ($link_tmp_name)), 0, $link_name_length);
 953     $l = s2p ("$md5_link");
 954     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 955         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 956         echo "Error";
 957
 958     /* Clean async upload. */
 959     jirafeau_async_delete ($ref);
 960     return $md5_link . NL . $delete_link_code . NL . urlencode($crypt_key);
 961 }
 962
 963 /**
 964   * Delete a block.
 965   * @param $id identifier of the block.
 966   */
 967 function
 968 jirafeau_block_delete_ ($id)
 969 {
 970     $p = VAR_BLOCK . s2p ($id);
 971     if (!file_exists ($p))
 972         return;
 973
 974     if (file_exists ($p . $id))
 975         unlink ($p . $id);
 976     if (file_exists ($p . $id . '_infos'))
 977         unlink ($p . $id . '_infos');
 978     $parse = $p;
 979     $scan = array();
 980     while (file_exists ($parse)
 981            && ($scan = scandir ($parse))
 982            && count ($scan) == 2 // '.' and '..' folders => empty.
 983            && basename ($parse) != basename (VAR_BLOCK))
 984     {
 985         rmdir ($parse);
 986         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 987     }
 988 }
 989
 990 /**
 991   * Create a file filled with zeros.
 992   * @param $size size of the file.
 993   * @return  a string corresponding to an id or the string "Error"
 994   */
 995 function
 996 jirafeau_block_init ($size)
 997 {
 998     if (!ctype_digit ($size) || $size <= 0)
 999         return "Error";
1000
1001     /* Create folder. */
1002     $id;
1003     do
1004     {
1005         $id = jirafeau_gen_random (32);
1006         $p = VAR_BLOCK . s2p ($id);
1007     } while (file_exists ($p));
1008     @mkdir ($p, 0755, true);
1009     if (!file_exists ($p))
1010     {
1011         echo "Error";
1012         return;
1013     }
1014
1015     /* Create block. */
1016     $p .= $id;
1017     $h = fopen ($p, 'w');
1018     $fill = str_repeat ("\0", 1024);
1019     for ($cnt = 0; $cnt < $size; $cnt += 1024)
1020     {
1021         if ($size - $cnt < 1024)
1022             $fill = str_repeat ("\0", $size - $cnt);
1023         if (fwrite ($h, $fill) === false)
1024         {
1025             fclose ($h);
1026             jirafeau_block_delete_ ($id);
1027             return "Error";
1028         }
1029     }
1030     fclose ($h);
1031
1032     /* Generate a write/delete code. */
1033     $code = jirafeau_gen_random (12);
1034
1035     /* Add block infos. */
1036     if (file_put_contents ($p . '_infos', date ('U') . NL . $size . NL . $code) === FALSE)
1037     {
1038         jirafeau_block_delete_ ($id);
1039         return "Error";
1040     }
1041
1042     return $id . NL . $code;
1043 }
1044
1045 /** Get block size in bytes.
1046   * @param $id identifier of the block
1047   * @return  block size in bytes
1048   */
1049 function
1050 jirafeau_block_get_size ($id)
1051 {
1052     $p = VAR_BLOCK . s2p ($id) . $id;
1053     if (!file_exists ($p))
1054         return "Error";
1055
1056     /* Check date. */
1057     $f = file ($p . '_infos');
1058     $date = trim ($f[0]);
1059     $block_size = trim ($f[1]);
1060     $stored_code = trim ($f[2]);
1061     /* Update date. */
1062     if (date ('U') - $date > JIRAFEAU_HOUR
1063         && date ('U') - $date < JIRAFEAU_MONTH)
1064     {
1065         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1066         {
1067             jirafeau_block_delete_ ($id);
1068             return "Error";
1069         }
1070     }
1071     /* Remove data. */
1072     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1073     {
1074         echo date ('U'). " $date ";
1075         jirafeau_block_delete_ ($id);
1076         return "Error";
1077     }
1078
1079     return $block_size;
1080 }
1081
1082 /**
1083   * Read some data in a block.
1084   * @param $id identifier of the block
1085   * @param $start where to read data (starting from zero).
1086   * @param $length length to read.
1087   * @return  echo data
1088   */
1089 function
1090 jirafeau_block_read ($id, $start, $length)
1091 {
1092     if (!ctype_digit ($start) || $start < 0
1093         || !ctype_digit ($length) || $length <= 0)
1094     {
1095         echo "Error";
1096         return;
1097     }
1098
1099     $p = VAR_BLOCK . s2p ($id) . $id;
1100     if (!file_exists ($p))
1101     {
1102         echo "Error";
1103         return;
1104     }
1105
1106     /* Check date. */
1107     $f = file ($p . '_infos');
1108     $date = trim ($f[0]);
1109     $block_size = trim ($f[1]);
1110     $stored_code = trim ($f[2]);
1111     /* Update date. */
1112     if (date ('U') - $date > JIRAFEAU_HOUR
1113         && date ('U') - $date < JIRAFEAU_MONTH)
1114     {
1115         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1116         {
1117             jirafeau_block_delete_ ($id);
1118             echo "Error";
1119             return;
1120         }
1121     }
1122     /* Remove data. */
1123     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1124     {
1125         echo date ('U'). " $date ";
1126         jirafeau_block_delete_ ($id);
1127         echo "Error";
1128         return;
1129     }
1130
1131     if ($start + $length > $block_size)
1132     {
1133         echo "Error";
1134         return;
1135     }
1136
1137     /* Read content. */
1138     header ('Content-Length: ' . $length);
1139     header ('Content-Disposition: attachment');
1140
1141     $r = fopen ($p, 'r');
1142     if (fseek ($r, $start) != 0)
1143     {
1144         echo "Error";
1145         return;
1146     }
1147     $c = 1024;
1148     for ($cnt = 0; $cnt < $length && !feof ($r); $cnt += 1024)
1149     {
1150         if ($length - $cnt < 1024)
1151             $c = $length - $cnt;
1152         print fread ($r, $c);
1153         ob_flush();
1154     }
1155     fclose ($r);
1156 }
1157
1158 /**
1159   * Write some data in a block.
1160   * @param $id identifier of the block
1161   * @param $start where to writing data (starting from zero).
1162   * @param $data data to write.
1163   * @param $code code to allow writing.
1164   * @return  string "Ok" or string "Error".
1165   */
1166 function
1167 jirafeau_block_write ($id, $start, $data, $code)
1168 {
1169     if (!ctype_digit ($start) || $start < 0
1170         || strlen ($code) == 0)
1171         return "Error";
1172
1173     $p = VAR_BLOCK . s2p ($id) . $id;
1174     if (!file_exists ($p))
1175         return "Error";
1176
1177     /* Check date. */
1178     $f = file ($p . '_infos');
1179     $date = trim ($f[0]);
1180     $block_size = trim ($f[1]);
1181     $stored_code = trim ($f[2]);
1182     /* Update date. */
1183     if (date ('U') - $date > JIRAFEAU_HOUR
1184         && date ('U') - $date < JIRAFEAU_MONTH)
1185     {
1186         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1187         {
1188             jirafeau_block_delete_ ($id);
1189             return "Error";
1190         }
1191     }
1192     /* Remove data. */
1193     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1194     {
1195         jirafeau_block_delete_ ($id);
1196         return "Error";
1197     }
1198
1199     /* Check code. */
1200     if ($stored_code != $code)
1201     {
1202         echo "Error";
1203         return;
1204     }
1205
1206     /* Check data. */
1207     $size = $data['size'];
1208     if ($size <= 0)
1209         return "Error";
1210     if ($start + $size > $block_size)
1211         return "Error";
1212
1213     /* Open data. */
1214     $r = fopen ($data['tmp_name'], 'r');
1215
1216     /* Open Block. */
1217     $w = fopen ($p, 'r+');
1218     if (fseek ($w, $start) != 0)
1219         return "Error";
1220
1221     /* Write content. */
1222     $c = 1024;
1223     for ($cnt = 0; $cnt <= $size && !feof ($w); $cnt += 1024)
1224     {
1225         if ($size - $cnt < 1024)
1226             $c = $size - $cnt;
1227         $d = fread ($r, $c);
1228         fwrite ($w, $d);
1229     }
1230     fclose ($r);
1231     fclose ($w);
1232     unlink ($data['tmp_name']);
1233     return "Ok";
1234 }
1235
1236 /**
1237   * Delete a block.
1238   * @param $id identifier of the block.
1239   * @param $code code to allow writing.
1240   * @return  string "Ok" or string "Error".
1241   */
1242 function
1243 jirafeau_block_delete ($id, $code)
1244 {
1245     $p = VAR_BLOCK . s2p ($id) . $id;
1246
1247     if (!file_exists ($p))
1248         return "Error";
1249
1250     $f = file ($p . '_infos');
1251     $date = trim ($f[0]);
1252     $block_size = trim ($f[1]);
1253     $stored_code = trim ($f[2]);
1254
1255     if ($code != $stored_code)
1256         return "Error";
1257
1258     jirafeau_block_delete_ ($id);
1259     return "Ok";
1260 }
1261
1262 /**
1263  * Clean old unused blocks.
1264  * @return number of cleaned blocks.
1265  */
1266 function
1267 jirafeau_admin_clean_block ()
1268 {
1269     $count = 0;
1270     /* Get all blocks. */
1271     $stack = array (VAR_BLOCK);
1272     while (($d = array_shift ($stack)) && $d != NULL)
1273     {
1274         $dir = scandir ($d);
1275
1276         foreach ($dir as $node)
1277         {
1278             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0)
1279                 continue;
1280
1281             if (is_dir ($d . $node))
1282             {
1283                 /* Push new found directory. */
1284                 $stack[] = $d . $node . '/';
1285             }
1286             elseif (is_file ($d . $node) && preg_match ('/\_infos/i', "$node"))
1287             {
1288                 /* Read block informations. */
1289                 $f = file ($d . $node);
1290                 $date = trim ($f[0]);
1291                 $block_size = trim ($f[1]);
1292                 if (date ('U') - $date >= JIRAFEAU_MONTH)
1293                 {
1294                     jirafeau_block_delete_ (substr($node, 0, -6));
1295                     $count++;
1296                 }
1297             }
1298         }
1299     }
1300     return $count;
1301 }
1302
1303 function
1304 jirafeau_crypt_create_iv($base, $size)
1305 {
1306     $iv = '';
1307     while (strlen ($iv) < $size)
1308         $iv = $iv . $base;
1309     $iv = substr($iv, 0, $size);
1310     return $iv;
1311 }
1312
1313 /**
1314  * Crypt file and returns decrypt key.
1315  * @param $fp_src file path to the file to crypt.
1316  * @param $fp_dst file path to the file to write crypted file (could be the same).
1317  * @return decrypt key composed of the key and the iv separated by a point ('.')
1318  */
1319 function
1320 jirafeau_encrypt_file ($fp_src, $fp_dst)
1321 {
1322     $fs = filesize ($fp_src);
1323     if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
1324         return '';
1325
1326     /* Prepare module. */
1327     $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
1328     /* Generate key. */
1329     $crypt_key = jirafeau_gen_random (10);
1330     $md5_key = md5($crypt_key);
1331     $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
1332     /* Init module. */
1333     mcrypt_generic_init($m, $md5_key, $iv);
1334     /* Crypt file. */
1335     $r = fopen ($fp_src, 'r');
1336     $w = fopen ($fp_dst, 'c');
1337     while (!feof ($r))
1338     {
1339         $enc = mcrypt_generic($m, fread ($r, 1024));
1340         if (fwrite ($w, $enc) === false)
1341             return '';
1342     }
1343     fclose ($r);
1344     fclose ($w);
1345     /* Cleanup. */
1346     mcrypt_generic_deinit($m);
1347     mcrypt_module_close($m);
1348     return $crypt_key;
1349 }
1350
1351 /**
1352  * Decrypt file.
1353  * @param $fp_src file path to the file to decrypt.
1354  * @param $fp_dst file path to the file to write decrypted file (could be the same).
1355  * @param $k string composed of the key and the iv separated by a point ('.')
1356  * @return key used to decrypt. a string of length 0 is returned if failed.
1357  */
1358 function
1359 jirafeau_decrypt_file ($fp_src, $fp_dst, $k)
1360 {
1361     $fs = filesize ($fp_src);
1362     if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
1363         return false;
1364
1365     /* Init module */
1366     $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
1367     /* Extract key and iv. */
1368     $crypt_key = $k;
1369     $md5_key = md5($crypt_key);
1370     $iv = jirafeau_crypt_create_iv ($md5_key, mcrypt_enc_get_iv_size($m));
1371     /* Decrypt file. */
1372     $r = fopen ($fp_src, 'r');
1373     $w = fopen ($fp_dst, 'c');
1374     while (!feof ($r))
1375     {
1376         $dec = mdecrypt_generic($m, fread ($r, 1024));
1377         if (fwrite ($w, $dec) === false)
1378             return false;
1379     }
1380     fclose ($r);
1381     fclose ($w);
1382     /* Cleanup. */
1383     mcrypt_generic_deinit($m);
1384     mcrypt_module_close($m);
1385     return true;
1386 }
1387
1388 /**
1389  * Check if Jirafeau is password protected for visitors.
1390  * @return true if Jirafeau is password protected, false otherwise.
1391  */
1392 function jirafeau_has_upload_password ($cfg)
1393 {
1394     return count ($cfg['upload_password']) > 0;
1395 }
1396
1397 /**
1398  * Challenge password for a visitor.
1399  * @param $password password to be challenged
1400  * @return true if password is valid, false otherwise.
1401  */
1402 function jirafeau_challenge_upload_password ($cfg, $password)
1403 {
1404     if (!jirafeau_has_upload_password($cfg))
1405         return false;
1406     forEach ($cfg['upload_password'] as $p)
1407         if ($password == $p)
1408             return true;
1409     error_log("password not found $password");
1410     return false;
1411 }
1412