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