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 $crypt boolean asking to crypt or not
 310  * @returns an array containing some information
 311  *   'error' => information on possible errors
 312  *   'link' => the link name of the uploaded file
 313  *   'delete_link' => the link code to delete file
 314  */
 315 function
 316 jirafeau_upload ($file, $one_time_download, $key, $time, $ip, $crypt)
 317 {
 318     if (empty ($file['tmp_name']) || !is_uploaded_file ($file['tmp_name']))
 319     {
 320         return (array(
 321                  'error' =>
 322                    array ('has_error' => true,
 323                           'why' => jirafeau_upload_errstr ($file['error'])),
 324                  'link' => '',
 325                  'delete_link' => ''));
 326     }
 327
 328     /* array representing no error */
 329     $noerr = array ('has_error' => false, 'why' => '');
 330
 331     /* Crypt file if option is enabled. */
 332     $crypted = false;
 333     $crypt_key = '';
 334     if ($crypt == true && extension_loaded('mcrypt'))
 335     {
 336         $crypt_key = jirafeau_encrypt_file ($file['tmp_name'], $file['tmp_name']);
 337         if (strlen($crypt_key) > 0)
 338             $crypted = true;
 339     }
 340
 341     /* file informations */
 342     $md5 = md5_file ($file['tmp_name']);
 343     $name = str_replace (NL, '', trim ($file['name']));
 344     $mime_type = $file['type'];
 345     $size = $file['size'];
 346
 347     /* does file already exist ? */
 348     $rc = false;
 349     $p = s2p ("$md5");
 350     if (file_exists (VAR_FILES . $p .  $md5))
 351     {
 352         $rc = unlink ($file['tmp_name']);
 353     }
 354     elseif ((file_exists (VAR_FILES . $p) || @mkdir (VAR_FILES . $p, 0755, true))
 355             && move_uploaded_file ($file['tmp_name'], VAR_FILES . $p . $md5))
 356     {
 357         $rc = true;
 358     }
 359     if (!$rc)
 360     {
 361         return (array(
 362                  'error' =>
 363                    array ('has_error' => true,
 364                           'why' => t('Internal error during file creation.')),
 365                  'link' =>'',
 366                  'delete_link' => ''));
 367     }
 368
 369     /* Increment or create count file. */
 370     $counter = 0;
 371     if (file_exists (VAR_FILES . $p . $md5 . '_count'))
 372     {
 373         $content = file (VAR_FILES . $p . $md5. '_count');
 374         $counter = trim ($content[0]);
 375     }
 376     $counter++;
 377     $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 378     fwrite ($handle, $counter);
 379     fclose ($handle);
 380
 381     /* Create delete code. */
 382     $delete_link_code = jirafeau_gen_random (8);
 383
 384     /* md5 password or empty. */
 385     $password = '';
 386     if (!empty ($key))
 387         $password = md5 ($key);
 388
 389     /* create link file */
 390     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
 391     $handle = fopen ($link_tmp_name, 'w');
 392     fwrite ($handle,
 393             $name . NL. $mime_type . NL. $size . NL. $password . NL. $time .
 394             NL . $md5. NL . ($one_time_download ? 'O' : 'R') . NL . date ('U') .
 395             NL . $ip . NL. $delete_link_code . NL . ($crypted ? 'C' : 'O'));
 396     fclose ($handle);
 397     $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
 398     $l = s2p ("$md5_link");
 399     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 400         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 401     {
 402         if (file_exists ($link_tmp_name))
 403             unlink ($link_tmp_name);
 404
 405         $counter--;
 406         if ($counter >= 1)
 407         {
 408             $handle = fopen (VAR_FILES . $p . $md5. '_count', 'w');
 409             fwrite ($handle, $counter);
 410             fclose ($handle);
 411         }
 412         else
 413         {
 414             jirafeau_clean_rm_file ($md5_link);
 415         }
 416         return (array(
 417                  'error' =>
 418                    array ('has_error' => true,
 419                           'why' => t('Internal error during file creation. ')),
 420                  'link' =>'',
 421                  'delete_link' => ''));
 422     }
 423    return (array ('error' => $noerr,
 424                   'link' => $md5_link,
 425                   'delete_link' => $delete_link_code,
 426                   'crypt_key' => $crypt_key));
 427 }
 428
 429 /**
 430  * tells if a mime-type is viewable in a browser
 431  * @param $mime the mime type
 432  * @returns a boolean telling if a mime type is viewable
 433  */
 434 function
 435 jirafeau_is_viewable ($mime)
 436 {
 437     if (!empty ($mime))
 438     {
 439         /* Actually, verify if mime-type is an image or a text. */
 440         $viewable = array ('image', 'text');
 441         $decomposed = explode ('/', $mime);
 442         return in_array ($decomposed[0], $viewable);
 443     }
 444     return false;
 445 }
 446
 447 // Error handling functions.
 448 //! Global array that contains all registered errors.
 449 $error_list = array ();
 450
 451 /**
 452  * Adds an error to the list of errors.
 453  * @param $title the error's title
 454  * @param $description is a human-friendly description of the problem.
 455  */
 456 function
 457 add_error ($title, $description)
 458 {
 459     global $error_list;
 460     $error_list[] = '<p>' . $title. '<br />' . $description. '</p>';
 461 }
 462
 463 /**
 464  * Informs whether any error has been registered yet.
 465  * @return true if there are errors.
 466  */
 467 function
 468 has_error ()
 469 {
 470     global $error_list;
 471     return !empty ($error_list);
 472 }
 473
 474 /**
 475  * Displays all the errors.
 476  */
 477 function
 478 show_errors ()
 479 {
 480     if (has_error ())
 481     {
 482         global $error_list;
 483         echo '<div class="error">';
 484         foreach ($error_list as $error)
 485         {
 486             echo $error;
 487         }
 488         echo '</div>';
 489     }
 490 }
 491
 492 function check_errors ()
 493 {
 494     if (file_exists (JIRAFEAU_ROOT . 'install.php')
 495         && !file_exists (JIRAFEAU_ROOT . 'lib/config.local.php'))
 496     {
 497         header('Location: install.php');
 498         exit;
 499     }
 500
 501     /* check if the destination dirs are writable */
 502     $writable = is_writable (VAR_FILES) && is_writable (VAR_LINKS);
 503
 504     /* Checking for errors. */
 505     if (!is_writable (VAR_FILES))
 506         add_error (t('The file directory is not writable!'), VAR_FILES);
 507
 508     if (!is_writable (VAR_LINKS))
 509         add_error (t('The link directory is not writable!'), VAR_LINKS);
 510
 511     if (!is_writable (VAR_ASYNC))
 512         add_error (t('The async directory is not writable!'), VAR_ASYNC);
 513
 514      if (!is_writable (VAR_BLOCK))
 515         add_error (t('The block directory is not writable!'), VAR_BLOCK);
 516
 517    /* Check if the install.php script is still in the directory. */
 518     if (file_exists (JIRAFEAU_ROOT . 'install.php'))
 519         add_error (t('Installer script still present'),
 520              t('Please make sure to delete the installer script ' .
 521                '"install.php" before continuing.'));
 522 }
 523
 524 /**
 525  * Read link informations
 526  * @return array containing informations.
 527  */
 528 function
 529 jirafeau_get_link ($hash)
 530 {
 531     $out = array ();
 532     $link = VAR_LINKS . s2p ("$hash") . $hash;
 533
 534     if (!file_exists ($link))
 535         return $out;
 536
 537     $c = file ($link);
 538     $out['file_name'] = trim ($c[0]);
 539     $out['mime_type'] = trim ($c[1]);
 540     $out['file_size'] = trim ($c[2]);
 541     $out['key'] = trim ($c[3], NL);
 542     $out['time'] = trim ($c[4]);
 543     $out['md5'] = trim ($c[5]);
 544     $out['onetime'] = trim ($c[6]);
 545     $out['upload_date'] = trim ($c[7]);
 546     $out['ip'] = trim ($c[8]);
 547     $out['link_code'] = trim ($c[9]);
 548     if (trim ($c[10]) == 'C')
 549             $out['crypted'] = true;
 550
 551     return $out;
 552 }
 553
 554 /**
 555  * List files in admin interface.
 556  */
 557 function
 558 jirafeau_admin_list ($name, $file_hash, $link_hash)
 559 {
 560     echo '<fieldset><legend>';
 561     if (!empty ($name))
 562         echo t('Filename') . ": $name ";
 563     if (!empty ($file_hash))
 564         echo t('file') . ": $file_hash ";
 565     if (!empty ($link_hash))
 566         echo t('link') . ": $link_hash ";
 567     if (empty ($name) && empty ($file_hash) && empty ($link_hash))
 568         echo t('List all files');
 569     echo '</legend>';
 570     echo '<table>';
 571     echo '<tr>';
 572     echo '<td>' . t('Filename') . '</td>';
 573     echo '<td>' . t('Type') . '</td>';
 574     echo '<td>' . t('Size') . '</td>';
 575     echo '<td>' . t('Expire') . '</td>';
 576     echo '<td>' . t('Onetime') . '</td>';
 577     echo '<td>' . t('Upload date') . '</td>';
 578     echo '<td>' . t('Origin') . '</td>';
 579     echo '<td>' . t('Action') . '</td>';
 580     echo '</tr>';
 581
 582     /* Get all links files. */
 583     $stack = array (VAR_LINKS);
 584     while (($d = array_shift ($stack)) && $d != NULL)
 585     {
 586         $dir = scandir ($d);
 587         foreach ($dir as $node)
 588         {
 589             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 590                 preg_match ('/\.tmp/i', "$node"))
 591                 continue;
 592             if (is_dir ($d . $node))
 593             {
 594                 /* Push new found directory. */
 595                 $stack[] = $d . $node . '/';
 596             }
 597             elseif (is_file ($d . $node))
 598             {
 599                 /* Read link informations. */
 600                 $l = jirafeau_get_link ($node);
 601                 if (!count ($l))
 602                     continue;
 603
 604                 /* Filter. */
 605                 if (!empty ($name) && !preg_match ("/$name/i", $l['file_name']))
 606                     continue;
 607                 if (!empty ($file_hash) && $file_hash != $l['md5'])
 608                     continue;
 609                 if (!empty ($link_hash) && $link_hash != $node)
 610                     continue;
 611                 /* Print link informations. */
 612                 echo '<tr>';
 613                 echo '<td>' .
 614                 '<form action = "admin.php" method = "post">' .
 615                 '<input type = "hidden" name = "action" value = "download"/>' .
 616                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 617                 '<input type = "submit" value = "' . $l['file_name'] . '" />' .
 618                 '</form>';
 619                 echo '</td>';
 620                 echo '<td>' . $l['mime_type'] . '</td>';
 621                 echo '<td>' . jirafeau_human_size ($l['file_size']) . '</td>';
 622                 echo '<td>' . ($l['time'] == -1 ? '' : strftime ('%c', $l['time'])) .
 623                      '</td>';
 624                 echo '<td>' . $l['onetime'] . '</td>';
 625                 echo '<td>' . strftime ('%c', $l['upload_date']) . '</td>';
 626                 echo '<td>' . $l['ip'] . '</td>';
 627                 echo '<td>' .
 628                 '<form action = "admin.php" method = "post">' .
 629                 '<input type = "hidden" name = "action" value = "delete_link"/>' .
 630                 '<input type = "hidden" name = "link" value = "' . $node . '"/>' .
 631                 '<input type = "submit" value = "' . t('Del link') . '" />' .
 632                 '</form>' .
 633                 '<form action = "admin.php" method = "post">' .
 634                 '<input type = "hidden" name = "action" value = "delete_file"/>' .
 635                 '<input type = "hidden" name = "md5" value = "' . $l['md5'] . '"/>' .
 636                 '<input type = "submit" value = "' . t('Del file and links') . '" />' .
 637                 '</form>' .
 638                 '</td>';
 639                 echo '</tr>';
 640             }
 641         }
 642     }
 643     echo '</table></fieldset>';
 644 }
 645
 646 /**
 647  * Clean expired files.
 648  * @return number of cleaned files.
 649  */
 650 function
 651 jirafeau_admin_clean ()
 652 {
 653     $count = 0;
 654     /* Get all links files. */
 655     $stack = array (VAR_LINKS);
 656     while (($d = array_shift ($stack)) && $d != NULL)
 657     {
 658         $dir = scandir ($d);
 659
 660         foreach ($dir as $node)
 661         {
 662             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 663                 preg_match ('/\.tmp/i', "$node"))
 664                 continue;
 665
 666             if (is_dir ($d . $node))
 667             {
 668                 /* Push new found directory. */
 669                 $stack[] = $d . $node . '/';
 670             }
 671             elseif (is_file ($d . $node))
 672             {
 673                 /* Read link informations. */
 674                 $l = jirafeau_get_link (basename ($node));
 675                 if (!count ($l))
 676                     continue;
 677                 $p = s2p ($l['md5']);
 678                 if ($l['time'] > 0 && $l['time'] < time () || // expired
 679                     !file_exists (VAR_FILES . $p . $l['md5']) || // invalid
 680                     !file_exists (VAR_FILES . $p . $l['md5'] . '_count')) // invalid
 681                 {
 682                     jirafeau_delete_link ($node);
 683                     $count++;
 684                 }
 685             }
 686         }
 687     }
 688     return $count;
 689 }
 690
 691
 692 /**
 693  * Clean old async transferts.
 694  * @return number of cleaned files.
 695  */
 696 function
 697 jirafeau_admin_clean_async ()
 698 {
 699     $count = 0;
 700     /* Get all links files. */
 701     $stack = array (VAR_ASYNC);
 702     while (($d = array_shift ($stack)) && $d != NULL)
 703     {
 704         $dir = scandir ($d);
 705
 706         foreach ($dir as $node)
 707         {
 708             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0 ||
 709                 preg_match ('/\.tmp/i', "$node"))
 710                 continue;
 711
 712             if (is_dir ($d . $node))
 713             {
 714                 /* Push new found directory. */
 715                 $stack[] = $d . $node . '/';
 716             }
 717             elseif (is_file ($d . $node))
 718             {
 719                 /* Read async informations. */
 720                 $a = jirafeau_get_async_ref (basename ($node));
 721                 if (!count ($a))
 722                     continue;
 723                 /* Delete transferts older than 1 hour. */
 724                 if (date ('U') - $a['last_edited'] > 3600)
 725                 {
 726                     jirafeau_async_delete (basename ($node));
 727                     $count++;
 728                 }
 729             }
 730         }
 731     }
 732     return $count;
 733 }
 734 /**
 735  * Read async transfert informations
 736  * @return array containing informations.
 737  */
 738 function
 739 jirafeau_get_async_ref ($ref)
 740 {
 741     $out = array ();
 742     $refinfos = VAR_ASYNC . s2p ("$ref") . "$ref";
 743
 744     if (!file_exists ($refinfos))
 745         return $out;
 746
 747     $c = file ($refinfos);
 748     $out['file_name'] = trim ($c[0]);
 749     $out['mime_type'] = trim ($c[1]);
 750     $out['key'] = trim ($c[2], NL);
 751     $out['time'] = trim ($c[3]);
 752     $out['onetime'] = trim ($c[4]);
 753     $out['ip'] = trim ($c[5]);
 754     $out['last_edited'] = trim ($c[6]);
 755     $out['next_code'] = trim ($c[7]);
 756     return $out;
 757 }
 758
 759 /**
 760  * Delete async transfert informations
 761   */
 762 function
 763 jirafeau_async_delete ($ref)
 764 {
 765     $p = s2p ("$ref");
 766     if (file_exists (VAR_ASYNC . $p . $ref))
 767         unlink (VAR_ASYNC . $p . $ref);
 768     if (file_exists (VAR_ASYNC . $p . $ref . '_data'))
 769         unlink (VAR_ASYNC . $p . $ref . '_data');
 770     $parse = VAR_ASYNC . $p;
 771     $scan = array();
 772     while (file_exists ($parse)
 773            && ($scan = scandir ($parse))
 774            && count ($scan) == 2 // '.' and '..' folders => empty.
 775            && basename ($parse) != basename (VAR_ASYNC))
 776     {
 777         rmdir ($parse);
 778         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 779     }
 780 }
 781
 782 /**
 783   * Init a new asynchronous upload.
 784   * @param $finename Name of the file to send
 785   * @param $one_time One time upload parameter
 786   * @param $key eventual password (or blank)
 787   * @param $time time limit
 788   * @param $ip ip address of the client
 789   * @return  a string containing a temporary reference followed by a code or the string "Error"
 790   */
 791 function
 792 jirafeau_async_init ($filename, $type, $one_time, $key, $time, $ip)
 793 {
 794     $res = 'Error';
 795
 796     /* Create temporary folder. */
 797     $ref;
 798     $p;
 799     $code = jirafeau_gen_random (4);
 800     do
 801     {
 802         $ref = jirafeau_gen_random (32);
 803         $p = VAR_ASYNC . s2p ($ref);
 804     } while (file_exists ($p));
 805     @mkdir ($p, 0755, true);
 806     if (!file_exists ($p))
 807     {
 808         echo "Error";
 809         return;
 810     }
 811
 812     /* md5 password or empty */
 813     $password = '';
 814     if (!empty ($key))
 815         $password = md5 ($key);
 816
 817     /* Store informations. */
 818     $p .= $ref;
 819     $handle = fopen ($p, 'w');
 820     fwrite ($handle,
 821             str_replace (NL, '', trim ($filename)) . NL .
 822             str_replace (NL, '', trim ($type)) . NL . $password . NL .
 823             $time . NL . ($one_time ? 'O' : 'R') . NL . $ip . NL .
 824             date ('U') . NL . $code . NL);
 825     fclose ($handle);
 826
 827     return $ref . NL . $code ;
 828 }
 829
 830 /**
 831   * Append a piece of file on the asynchronous upload.
 832   * @param $ref asynchronous upload reference
 833   * @param $file piece of data
 834   * @param $code client code for this operation
 835   * @return  a string containing a next code to use or the string "Error"
 836   */
 837 function
 838 jirafeau_async_push ($ref, $data, $code)
 839 {
 840     /* Get async infos. */
 841     $a = jirafeau_get_async_ref ($ref);
 842
 843     /* Check some errors. */
 844     if (count ($a) == 0
 845         || $a['next_code'] != "$code"
 846         || empty ($data['tmp_name'])
 847         || !is_uploaded_file ($data['tmp_name']))
 848         return "Error";
 849
 850     $p = s2p ($ref);
 851
 852     /* Concatenate data. */
 853     $r = fopen ($data['tmp_name'], 'r');
 854     $w = fopen (VAR_ASYNC . $p . $ref . '_data', 'a');
 855     while (!feof ($r))
 856     {
 857         if (fwrite ($w, fread ($r, 1024)) === false)
 858         {
 859             fclose ($r);
 860             fclose ($w);
 861             jirafeau_async_delete ($ref);
 862             return "Error";
 863         }
 864     }
 865     fclose ($r);
 866     fclose ($w);
 867     unlink ($data['tmp_name']);
 868
 869     /* Update async file. */
 870     $code = jirafeau_gen_random (4);
 871     $handle = fopen (VAR_ASYNC . $p . $ref, 'w');
 872     fwrite ($handle,
 873             $a['file_name'] . NL. $a['mime_type'] . NL. $a['key'] . NL .
 874             $a['time'] . NL . $a['onetime'] . NL . $a['ip'] . NL .
 875             date ('U') . NL . $code . NL);
 876     fclose ($handle);
 877     return $code;
 878 }
 879
 880 /**
 881   * Finalyze an asynchronous upload.
 882   * @param $ref asynchronous upload reference
 883   * @param $code client code for this operation
 884   * @param $crypt boolean asking to crypt or not
 885   * @return  a string containing the download reference followed by a delete code or the string "Error"
 886   */
 887 function
 888 jirafeau_async_end ($ref, $code, $crypt)
 889 {
 890     /* Get async infos. */
 891     $a = jirafeau_get_async_ref ($ref);
 892     if (count ($a) == 0
 893         || $a['next_code'] != "$code")
 894         return "Error";
 895
 896     /* Generate link infos. */
 897     $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
 898     if (!file_exists($p))
 899         return "Error";
 900
 901     $crypted = false;
 902     $crypt_key = '';
 903     if ($crypt == true && extension_loaded('mcrypt'))
 904     {
 905         $cypt_key = jirafeau_encrypt_file ($p, $p);
 906         if (strlen($crypt_key) > 0)
 907             $crypted = true;
 908     }
 909
 910     $md5 = md5_file ($p);
 911     $size = filesize($p);
 912     $np = s2p ($md5);
 913     $delete_link_code = jirafeau_gen_random (8);
 914
 915     /* File already exist ? */
 916     if (!file_exists (VAR_FILES . $np))
 917         @mkdir (VAR_FILES . $np, 0755, true);
 918     if (!file_exists (VAR_FILES . $np . $md5))
 919         rename ($p, VAR_FILES . $np . $md5);
 920
 921     /* Increment or create count file. */
 922     $counter = 0;
 923     if (file_exists (VAR_FILES . $np . $md5 . '_count'))
 924     {
 925         $content = file (VAR_FILES . $np . $md5. '_count');
 926         $counter = trim ($content[0]);
 927     }
 928     $counter++;
 929     $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
 930     fwrite ($handle, $counter);
 931     fclose ($handle);
 932
 933     /* Create link. */
 934     $link_tmp_name =  VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
 935     $handle = fopen ($link_tmp_name, 'w');
 936     fwrite ($handle,
 937             $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
 938             $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
 939             date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL . ($crypted ? 'C' : 'O'));
 940     fclose ($handle);
 941     $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
 942     $l = s2p ("$md5_link");
 943     if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
 944         !rename ($link_tmp_name,  VAR_LINKS . $l . $md5_link))
 945         echo "Error";
 946
 947     /* Clean async upload. */
 948     jirafeau_async_delete ($ref);
 949     return $md5_link . NL . $delete_link_code . NL . urlencode($crypt_key);
 950 }
 951
 952 /**
 953   * Delete a block.
 954   * @param $id identifier of the block.
 955   */
 956 function
 957 jirafeau_block_delete_ ($id)
 958 {
 959     $p = VAR_BLOCK . s2p ($id);
 960     if (!file_exists ($p))
 961         return;
 962
 963     if (file_exists ($p . $id))
 964         unlink ($p . $id);
 965     if (file_exists ($p . $id . '_infos'))
 966         unlink ($p . $id . '_infos');
 967     $parse = $p;
 968     $scan = array();
 969     while (file_exists ($parse)
 970            && ($scan = scandir ($parse))
 971            && count ($scan) == 2 // '.' and '..' folders => empty.
 972            && basename ($parse) != basename (VAR_BLOCK))
 973     {
 974         rmdir ($parse);
 975         $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
 976     }
 977 }
 978
 979 /**
 980   * Create a file filled with zeros.
 981   * @param $size size of the file.
 982   * @return  a string corresponding to an id or the string "Error"
 983   */
 984 function
 985 jirafeau_block_init ($size)
 986 {
 987     if (!ctype_digit ($size) || $size <= 0)
 988         return "Error";
 989
 990     /* Create folder. */
 991     $id;
 992     do
 993     {
 994         $id = jirafeau_gen_random (32);
 995         $p = VAR_BLOCK . s2p ($id);
 996     } while (file_exists ($p));
 997     @mkdir ($p, 0755, true);
 998     if (!file_exists ($p))
 999     {
1000         echo "Error";
1001         return;
1002     }
1003
1004     /* Create block. */
1005     $p .= $id;
1006     $h = fopen ($p, 'w');
1007     $fill = str_repeat ("\0", 1024);
1008     for ($cnt = 0; $cnt < $size; $cnt += 1024)
1009     {
1010         if ($size - $cnt < 1024)
1011             $fill = str_repeat ("\0", $size - $cnt);
1012         if (fwrite ($h, $fill) === false)
1013         {
1014             fclose ($h);
1015             jirafeau_block_delete_ ($id);
1016             return "Error";
1017         }
1018     }
1019     fclose ($h);
1020
1021     /* Generate a write/delete code. */
1022     $code = jirafeau_gen_random (12);
1023
1024     /* Add block infos. */
1025     if (file_put_contents ($p . '_infos', date ('U') . NL . $size . NL . $code) === FALSE)
1026     {
1027         jirafeau_block_delete_ ($id);
1028         return "Error";
1029     }
1030
1031     return $id . NL . $code;
1032 }
1033
1034 /** Get block size in bytes.
1035   * @param $id identifier of the block
1036   * @return  block size in bytes
1037   */
1038 function
1039 jirafeau_block_get_size ($id)
1040 {
1041     $p = VAR_BLOCK . s2p ($id) . $id;
1042     if (!file_exists ($p))
1043         return "Error";
1044
1045     /* Check date. */
1046     $f = file ($p . '_infos');
1047     $date = trim ($f[0]);
1048     $block_size = trim ($f[1]);
1049     $stored_code = trim ($f[2]);
1050     /* Update date. */
1051     if (date ('U') - $date > JIRAFEAU_HOUR
1052         && date ('U') - $date < JIRAFEAU_MONTH)
1053     {
1054         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1055         {
1056             jirafeau_block_delete_ ($id);
1057             return "Error";
1058         }
1059     }
1060     /* Remove data. */
1061     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1062     {
1063         echo date ('U'). " $date ";
1064         jirafeau_block_delete_ ($id);
1065         return "Error";
1066     }
1067
1068     return $block_size;
1069 }
1070
1071 /**
1072   * Read some data in a block.
1073   * @param $id identifier of the block
1074   * @param $start where to read data (starting from zero).
1075   * @param $length length to read.
1076   * @return  echo data
1077   */
1078 function
1079 jirafeau_block_read ($id, $start, $length)
1080 {
1081     if (!ctype_digit ($start) || $start < 0
1082         || !ctype_digit ($length) || $length <= 0)
1083     {
1084         echo "Error";
1085         return;
1086     }
1087
1088     $p = VAR_BLOCK . s2p ($id) . $id;
1089     if (!file_exists ($p))
1090     {
1091         echo "Error";
1092         return;
1093     }
1094
1095     /* Check date. */
1096     $f = file ($p . '_infos');
1097     $date = trim ($f[0]);
1098     $block_size = trim ($f[1]);
1099     $stored_code = trim ($f[2]);
1100     /* Update date. */
1101     if (date ('U') - $date > JIRAFEAU_HOUR
1102         && date ('U') - $date < JIRAFEAU_MONTH)
1103     {
1104         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1105         {
1106             jirafeau_block_delete_ ($id);
1107             echo "Error";
1108             return;
1109         }
1110     }
1111     /* Remove data. */
1112     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1113     {
1114         echo date ('U'). " $date ";
1115         jirafeau_block_delete_ ($id);
1116         echo "Error";
1117         return;
1118     }
1119
1120     if ($start + $length > $block_size)
1121     {
1122         echo "Error";
1123         return;
1124     }
1125
1126     /* Read content. */
1127     header ('Content-Length: ' . $length);
1128     header ('Content-Disposition: attachment');
1129
1130     $r = fopen ($p, 'r');
1131     if (fseek ($r, $start) != 0)
1132     {
1133         echo "Error";
1134         return;
1135     }
1136     $c = 1024;
1137     for ($cnt = 0; $cnt < $length && !feof ($r); $cnt += 1024)
1138     {
1139         if ($length - $cnt < 1024)
1140             $c = $length - $cnt;
1141         print fread ($r, $c);
1142         ob_flush();
1143     }
1144     fclose ($r);
1145 }
1146
1147 /**
1148   * Write some data in a block.
1149   * @param $id identifier of the block
1150   * @param $start where to writing data (starting from zero).
1151   * @param $data data to write.
1152   * @param $code code to allow writing.
1153   * @return  string "Ok" or string "Error".
1154   */
1155 function
1156 jirafeau_block_write ($id, $start, $data, $code)
1157 {
1158     if (!ctype_digit ($start) || $start < 0
1159         || strlen ($code) == 0)
1160         return "Error";
1161
1162     $p = VAR_BLOCK . s2p ($id) . $id;
1163     if (!file_exists ($p))
1164         return "Error";
1165
1166     /* Check date. */
1167     $f = file ($p . '_infos');
1168     $date = trim ($f[0]);
1169     $block_size = trim ($f[1]);
1170     $stored_code = trim ($f[2]);
1171     /* Update date. */
1172     if (date ('U') - $date > JIRAFEAU_HOUR
1173         && date ('U') - $date < JIRAFEAU_MONTH)
1174     {
1175         if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
1176         {
1177             jirafeau_block_delete_ ($id);
1178             return "Error";
1179         }
1180     }
1181     /* Remove data. */
1182     elseif (date ('U') - $date >= JIRAFEAU_MONTH)
1183     {
1184         jirafeau_block_delete_ ($id);
1185         return "Error";
1186     }
1187
1188     /* Check code. */
1189     if ($stored_code != $code)
1190     {
1191         echo "Error";
1192         return;
1193     }
1194
1195     /* Check data. */
1196     $size = $data['size'];
1197     if ($size <= 0)
1198         return "Error";
1199     if ($start + $size > $block_size)
1200         return "Error";
1201
1202     /* Open data. */
1203     $r = fopen ($data['tmp_name'], 'r');
1204
1205     /* Open Block. */
1206     $w = fopen ($p, 'r+');
1207     if (fseek ($w, $start) != 0)
1208         return "Error";
1209
1210     /* Write content. */
1211     $c = 1024;
1212     for ($cnt = 0; $cnt <= $size && !feof ($w); $cnt += 1024)
1213     {
1214         if ($size - $cnt < 1024)
1215             $c = $size - $cnt;
1216         $d = fread ($r, $c);
1217         fwrite ($w, $d);
1218     }
1219     fclose ($r);
1220     fclose ($w);
1221     unlink ($data['tmp_name']);
1222     return "Ok";
1223 }
1224
1225 /**
1226   * Delete a block.
1227   * @param $id identifier of the block.
1228   * @param $code code to allow writing.
1229   * @return  string "Ok" or string "Error".
1230   */
1231 function
1232 jirafeau_block_delete ($id, $code)
1233 {
1234     $p = VAR_BLOCK . s2p ($id) . $id;
1235
1236     if (!file_exists ($p))
1237         return "Error";
1238
1239     $f = file ($p . '_infos');
1240     $date = trim ($f[0]);
1241     $block_size = trim ($f[1]);
1242     $stored_code = trim ($f[2]);
1243
1244     if ($code != $stored_code)
1245         return "Error";
1246
1247     jirafeau_block_delete_ ($id);
1248     return "Ok";
1249 }
1250
1251 /**
1252  * Clean old unused blocks.
1253  * @return number of cleaned blocks.
1254  */
1255 function
1256 jirafeau_admin_clean_block ()
1257 {
1258     $count = 0;
1259     /* Get all blocks. */
1260     $stack = array (VAR_BLOCK);
1261     while (($d = array_shift ($stack)) && $d != NULL)
1262     {
1263         $dir = scandir ($d);
1264
1265         foreach ($dir as $node)
1266         {
1267             if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0)
1268                 continue;
1269
1270             if (is_dir ($d . $node))
1271             {
1272                 /* Push new found directory. */
1273                 $stack[] = $d . $node . '/';
1274             }
1275             elseif (is_file ($d . $node) && preg_match ('/\_infos/i', "$node"))
1276             {
1277                 /* Read block informations. */
1278                 $f = file ($d . $node);
1279                 $date = trim ($f[0]);
1280                 $block_size = trim ($f[1]);
1281                 if (date ('U') - $date >= JIRAFEAU_MONTH)
1282                 {
1283                     jirafeau_block_delete_ (substr($node, 0, -6));
1284                     $count++;
1285                 }
1286             }
1287         }
1288     }
1289     return $count;
1290 }
1291
1292 /**
1293  * Crypt file and returns decrypt key.
1294  * @param $fp_src file path to the file to crypt.
1295  * @param $fp_dst file path to the file to write crypted file (could be the same).
1296  * @return decrypt key composed of the key and the iv separated by a point ('.')
1297  */
1298 function
1299 jirafeau_encrypt_file ($fp_src, $fp_dst)
1300 {
1301     $fs = filesize ($fp_src);
1302     if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
1303         return '';
1304
1305     /* Prepare module. */
1306     $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
1307     $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($m), MCRYPT_DEV_URANDOM);
1308     /* Generate key. */
1309     $ks = mcrypt_enc_get_key_size($m);
1310     $key = substr(md5(jirafeau_gen_random(12)), 0, $ks);
1311     /* Init module. */
1312     mcrypt_generic_init($m, $key, $iv);
1313     /* Crypt file. */
1314     $r = fopen ($fp_src, 'r');
1315     $w = fopen ($fp_dst, 'c');
1316     while (!feof ($r))
1317     {
1318         $enc = mcrypt_generic($m, fread ($r, 1024));
1319         if (fwrite ($w, $enc) === false)
1320             return '';
1321     }
1322     fclose ($r);
1323     fclose ($w);
1324     /* Cleanup. */
1325     mcrypt_generic_deinit($m);
1326     mcrypt_module_close($m);
1327     return $key . "." . base64_encode($iv);
1328 }
1329
1330 /**
1331  * Decrypt file.
1332  * @param $fp_src file path to the file to decrypt.
1333  * @param $fp_dst file path to the file to write decrypted file (could be the same).
1334  * @param $k string composed of the key and the iv separated by a point ('.')
1335  * @return key used to decrypt. a string of length 0 is returned if failed.
1336  */
1337 function
1338 jirafeau_decrypt_file ($fp_src, $fp_dst, $k)
1339 {
1340     $fs = filesize ($fp_src);
1341     if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
1342         return false;
1343
1344     /* Extract key and iv. */
1345     $ex = explode (".", $k);
1346     $key = $ex[0];
1347     $iv = base64_decode($ex[1]);
1348     /* Init module */
1349     $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
1350     mcrypt_generic_init($m, $key, $iv);
1351     /* Decrypt file. */
1352     $r = fopen ($fp_src, 'r');
1353     $w = fopen ($fp_dst, 'c');
1354     while (!feof ($r))
1355     {
1356         $dec = mdecrypt_generic($m, fread ($r, 1024));
1357         if (fwrite ($w, $dec) === false)
1358             return false;
1359     }
1360     fclose ($r);
1361     fclose ($w);
1362     /* Cleanup. */
1363     mcrypt_generic_deinit($m);
1364     mcrypt_module_close($m);
1365     return true;
1366 }
1367
1368 ?>