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1 <?php 2 /** 3 * 4 * This file is part of the phpBB Forum Software package. 5 * 6 * @copyright (c) phpBB Limited <https://www.phpbb.com> 7 * @license GNU General Public License, version 2 (GPL-2.0) 8 * 9 * For full copyright and license information, please see 10 * the docs/CREDITS.txt file. 11 * 12 */ 13 14 /** 15 * @ignore 16 */ 17 if (!defined('IN_PHPBB')) 18 { 19 exit; 20 } 21 22 /** 23 * Class for handling archives (compression/decompression) 24 */ 25 class compress 26 { 27 var $fp = 0; 28 29 /** 30 * @var array 31 */ 32 protected $filelist = array(); 33 34 /** 35 * Add file to archive 36 */ 37 function add_file($src, $src_rm_prefix = '', $src_add_prefix = '', $skip_files = '') 38 { 39 global $phpbb_root_path; 40 41 $skip_files = explode(',', $skip_files); 42 43 // Remove rm prefix from src path 44 $src_path = ($src_rm_prefix) ? preg_replace('#^(' . preg_quote($src_rm_prefix, '#') . ')#', '', $src) : $src; 45 // Add src prefix 46 $src_path = ($src_add_prefix) ? ($src_add_prefix . ((substr($src_add_prefix, -1) != '/') ? '/' : '') . $src_path) : $src_path; 47 // Remove initial "/" if present 48 $src_path = (substr($src_path, 0, 1) == '/') ? substr($src_path, 1) : $src_path; 49 50 if (is_file($phpbb_root_path . $src)) 51 { 52 $this->data($src_path, file_get_contents("$phpbb_root_path$src"), stat("$phpbb_root_path$src"), false); 53 } 54 else if (is_dir($phpbb_root_path . $src)) 55 { 56 // Clean up path, add closing / if not present 57 $src_path = ($src_path && substr($src_path, -1) != '/') ? $src_path . '/' : $src_path; 58 59 $filelist = array(); 60 $filelist = filelist("$phpbb_root_path$src", '', '*'); 61 krsort($filelist); 62 63 /** 64 * Commented out, as adding the folders produces corrupted archives 65 if ($src_path) 66 { 67 $this->data($src_path, '', true, stat("$phpbb_root_path$src")); 68 } 69 */ 70 71 foreach ($filelist as $path => $file_ary) 72 { 73 /** 74 * Commented out, as adding the folders produces corrupted archives 75 if ($path) 76 { 77 // Same as for src_path 78 $path = (substr($path, 0, 1) == '/') ? substr($path, 1) : $path; 79 $path = ($path && substr($path, -1) != '/') ? $path . '/' : $path; 80 81 $this->data("$src_path$path", '', true, stat("$phpbb_root_path$src$path")); 82 } 83 */ 84 85 foreach ($file_ary as $file) 86 { 87 if (in_array($path . $file, $skip_files)) 88 { 89 continue; 90 } 91 92 $this->data("$src_path$path$file", file_get_contents("$phpbb_root_path$src$path$file"), stat("$phpbb_root_path$src$path$file"), false); 93 } 94 } 95 } 96 else 97 { 98 // $src does not exist 99 return false; 100 } 101 102 return true; 103 } 104 105 /** 106 * Add custom file (the filepath will not be adjusted) 107 */ 108 function add_custom_file($src, $filename) 109 { 110 if (!file_exists($src)) 111 { 112 return false; 113 } 114 115 $this->data($filename, file_get_contents($src), stat($src), false); 116 return true; 117 } 118 119 /** 120 * Add file data 121 */ 122 function add_data($src, $name) 123 { 124 $stat = array(); 125 $stat[2] = 436; //384 126 $stat[4] = $stat[5] = 0; 127 $stat[7] = strlen($src); 128 $stat[9] = time(); 129 $this->data($name, $src, $stat, false); 130 return true; 131 } 132 133 /** 134 * Checks if a file by that name as already been added and, if it has, 135 * returns a new, unique name. 136 * 137 * @param string $name The filename 138 * @return string A unique filename 139 */ 140 protected function unique_filename($name) 141 { 142 if (isset($this->filelist[$name])) 143 { 144 $start = $name; 145 $ext = ''; 146 $this->filelist[$name]++; 147 148 // Separate the extension off the end of the filename to preserve it 149 $pos = strrpos($name, '.'); 150 if ($pos !== false) 151 { 152 $start = substr($name, 0, $pos); 153 $ext = substr($name, $pos); 154 } 155 156 return $start . '_' . $this->filelist[$name] . $ext; 157 } 158 159 $this->filelist[$name] = 0; 160 return $name; 161 } 162 163 /** 164 * Return available methods 165 * 166 * @return array Array of strings of available compression methods (.tar, .tar.gz, .zip, etc.) 167 */ 168 static public function methods() 169 { 170 $methods = array('.tar'); 171 $available_methods = array('.tar.gz' => 'zlib', '.tar.bz2' => 'bz2', '.zip' => 'zlib'); 172 173 foreach ($available_methods as $type => $module) 174 { 175 if (!@extension_loaded($module)) 176 { 177 continue; 178 } 179 $methods[] = $type; 180 } 181 182 return $methods; 183 } 184 } 185 186 /** 187 * Zip creation class from phpMyAdmin 2.3.0 (c) Tobias Ratschiller, Olivier Müller, Loïc Chapeaux, 188 * Marc Delisle, http://www.phpmyadmin.net/ 189 * 190 * Zip extraction function by Alexandre Tedeschi, alexandrebr at gmail dot com 191 * 192 * Modified extensively by psoTFX and DavidMJ, (c) phpBB Limited, 2003 193 * 194 * Based on work by Eric Mueller and Denis125 195 * Official ZIP file format: http://www.pkware.com/appnote.txt 196 */ 197 class compress_zip extends compress 198 { 199 var $datasec = array(); 200 var $ctrl_dir = array(); 201 var $eof_cdh = "\x50\x4b\x05\x06\x00\x00\x00\x00"; 202 203 var $old_offset = 0; 204 var $datasec_len = 0; 205 206 /** 207 * Constructor 208 */ 209 function compress_zip($mode, $file) 210 { 211 $this->fp = @fopen($file, $mode . 'b'); 212 213 if (!$this->fp) 214 { 215 trigger_error('Unable to open file ' . $file . ' [' . $mode . 'b]'); 216 } 217 } 218 219 /** 220 * Convert unix to dos time 221 */ 222 function unix_to_dos_time($time) 223 { 224 $timearray = (!$time) ? getdate() : getdate($time); 225 226 if ($timearray['year'] < 1980) 227 { 228 $timearray['year'] = 1980; 229 $timearray['mon'] = $timearray['mday'] = 1; 230 $timearray['hours'] = $timearray['minutes'] = $timearray['seconds'] = 0; 231 } 232 233 return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); 234 } 235 236 /** 237 * Extract archive 238 */ 239 function extract($dst) 240 { 241 // Loop the file, looking for files and folders 242 $dd_try = false; 243 rewind($this->fp); 244 245 while (!feof($this->fp)) 246 { 247 // Check if the signature is valid... 248 $signature = fread($this->fp, 4); 249 250 switch ($signature) 251 { 252 // 'Local File Header' 253 case "\x50\x4b\x03\x04": 254 // Lets get everything we need. 255 // We don't store the version needed to extract, the general purpose bit flag or the date and time fields 256 $data = unpack("@4/vc_method/@10/Vcrc/Vc_size/Vuc_size/vname_len/vextra_field", fread($this->fp, 26)); 257 $file_name = fread($this->fp, $data['name_len']); // filename 258 259 if ($data['extra_field']) 260 { 261 fread($this->fp, $data['extra_field']); // extra field 262 } 263 264 $target_filename = "$dst$file_name"; 265 266 if (!$data['uc_size'] && !$data['crc'] && substr($file_name, -1, 1) == '/') 267 { 268 if (!is_dir($target_filename)) 269 { 270 $str = ''; 271 $folders = explode('/', $target_filename); 272 273 // Create and folders and subfolders if they do not exist 274 foreach ($folders as $folder) 275 { 276 $folder = trim($folder); 277 if (!$folder) 278 { 279 continue; 280 } 281 282 $str = (!empty($str)) ? $str . '/' . $folder : $folder; 283 if (!is_dir($str)) 284 { 285 if (!@mkdir($str, 0777)) 286 { 287 trigger_error("Could not create directory $folder"); 288 } 289 phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); 290 } 291 } 292 } 293 // This is a directory, we are not writting files 294 continue; 295 } 296 else 297 { 298 // Some archivers are punks, they don't include folders in their archives! 299 $str = ''; 300 $folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME)); 301 302 // Create and folders and subfolders if they do not exist 303 foreach ($folders as $folder) 304 { 305 $folder = trim($folder); 306 if (!$folder) 307 { 308 continue; 309 } 310 311 $str = (!empty($str)) ? $str . '/' . $folder : $folder; 312 if (!is_dir($str)) 313 { 314 if (!@mkdir($str, 0777)) 315 { 316 trigger_error("Could not create directory $folder"); 317 } 318 phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); 319 } 320 } 321 } 322 323 if (!$data['uc_size']) 324 { 325 $content = ''; 326 } 327 else 328 { 329 $content = fread($this->fp, $data['c_size']); 330 } 331 332 $fp = fopen($target_filename, "w"); 333 334 switch ($data['c_method']) 335 { 336 case 0: 337 // Not compressed 338 fwrite($fp, $content); 339 break; 340 341 case 8: 342 // Deflate 343 fwrite($fp, gzinflate($content, $data['uc_size'])); 344 break; 345 346 case 12: 347 // Bzip2 348 fwrite($fp, bzdecompress($content)); 349 break; 350 } 351 352 fclose($fp); 353 break; 354 355 // We hit the 'Central Directory Header', we can stop because nothing else in here requires our attention 356 // or we hit the end of the central directory record, we can safely end the loop as we are totally finished with looking for files and folders 357 case "\x50\x4b\x01\x02": 358 // This case should simply never happen.. but it does exist.. 359 case "\x50\x4b\x05\x06": 360 break 2; 361 362 // 'Packed to Removable Disk', ignore it and look for the next signature... 363 case 'PK00': 364 continue 2; 365 366 // We have encountered a header that is weird. Lets look for better data... 367 default: 368 if (!$dd_try) 369 { 370 // Unexpected header. Trying to detect wrong placed 'Data Descriptor'; 371 $dd_try = true; 372 fseek($this->fp, 8, SEEK_CUR); // Jump over 'crc-32'(4) 'compressed-size'(4), 'uncompressed-size'(4) 373 continue 2; 374 } 375 trigger_error("Unexpected header, ending loop"); 376 break 2; 377 } 378 379 $dd_try = false; 380 } 381 } 382 383 /** 384 * Close archive 385 */ 386 function close() 387 { 388 // Write out central file directory and footer ... if it exists 389 if (sizeof($this->ctrl_dir)) 390 { 391 fwrite($this->fp, $this->file()); 392 } 393 fclose($this->fp); 394 } 395 396 /** 397 * Create the structures ... note we assume version made by is MSDOS 398 */ 399 function data($name, $data, $stat, $is_dir = false) 400 { 401 $name = str_replace('\\', '/', $name); 402 $name = $this->unique_filename($name); 403 404 $hexdtime = pack('V', $this->unix_to_dos_time($stat[9])); 405 406 if ($is_dir) 407 { 408 $unc_len = $c_len = $crc = 0; 409 $zdata = ''; 410 $var_ext = 10; 411 } 412 else 413 { 414 $unc_len = strlen($data); 415 $crc = crc32($data); 416 $zdata = gzdeflate($data); 417 $c_len = strlen($zdata); 418 $var_ext = 20; 419 420 // Did we compress? No, then use data as is 421 if ($c_len >= $unc_len) 422 { 423 $zdata = $data; 424 $c_len = $unc_len; 425 $var_ext = 10; 426 } 427 } 428 unset($data); 429 430 // If we didn't compress set method to store, else deflate 431 $c_method = ($c_len == $unc_len) ? "\x00\x00" : "\x08\x00"; 432 433 // Are we a file or a directory? Set archive for file 434 $attrib = ($is_dir) ? 16 : 32; 435 436 // File Record Header 437 $fr = "\x50\x4b\x03\x04"; // Local file header 4bytes 438 $fr .= pack('v', $var_ext); // ver needed to extract 2bytes 439 $fr .= "\x00\x00"; // gen purpose bit flag 2bytes 440 $fr .= $c_method; // compression method 2bytes 441 $fr .= $hexdtime; // last mod time and date 2+2bytes 442 $fr .= pack('V', $crc); // crc32 4bytes 443 $fr .= pack('V', $c_len); // compressed filesize 4bytes 444 $fr .= pack('V', $unc_len); // uncompressed filesize 4bytes 445 $fr .= pack('v', strlen($name));// length of filename 2bytes 446 447 $fr .= pack('v', 0); // extra field length 2bytes 448 $fr .= $name; 449 $fr .= $zdata; 450 unset($zdata); 451 452 $this->datasec_len += strlen($fr); 453 454 // Add data to file ... by writing data out incrementally we save some memory 455 fwrite($this->fp, $fr); 456 unset($fr); 457 458 // Central Directory Header 459 $cdrec = "\x50\x4b\x01\x02"; // header 4bytes 460 $cdrec .= "\x00\x00"; // version made by 461 $cdrec .= pack('v', $var_ext); // version needed to extract 462 $cdrec .= "\x00\x00"; // gen purpose bit flag 463 $cdrec .= $c_method; // compression method 464 $cdrec .= $hexdtime; // last mod time & date 465 $cdrec .= pack('V', $crc); // crc32 466 $cdrec .= pack('V', $c_len); // compressed filesize 467 $cdrec .= pack('V', $unc_len); // uncompressed filesize 468 $cdrec .= pack('v', strlen($name)); // length of filename 469 $cdrec .= pack('v', 0); // extra field length 470 $cdrec .= pack('v', 0); // file comment length 471 $cdrec .= pack('v', 0); // disk number start 472 $cdrec .= pack('v', 0); // internal file attributes 473 $cdrec .= pack('V', $attrib); // external file attributes 474 $cdrec .= pack('V', $this->old_offset); // relative offset of local header 475 $cdrec .= $name; 476 477 // Save to central directory 478 $this->ctrl_dir[] = $cdrec; 479 480 $this->old_offset = $this->datasec_len; 481 } 482 483 /** 484 * file 485 */ 486 function file() 487 { 488 $ctrldir = implode('', $this->ctrl_dir); 489 490 return $ctrldir . $this->eof_cdh . 491 pack('v', sizeof($this->ctrl_dir)) . // total # of entries "on this disk" 492 pack('v', sizeof($this->ctrl_dir)) . // total # of entries overall 493 pack('V', strlen($ctrldir)) . // size of central dir 494 pack('V', $this->datasec_len) . // offset to start of central dir 495 "\x00\x00"; // .zip file comment length 496 } 497 498 /** 499 * Download archive 500 */ 501 function download($filename, $download_name = false) 502 { 503 global $phpbb_root_path; 504 505 if ($download_name === false) 506 { 507 $download_name = $filename; 508 } 509 510 $mimetype = 'application/zip'; 511 512 header('Cache-Control: private, no-cache'); 513 header("Content-Type: $mimetype; name=\"$download_name.zip\""); 514 header("Content-disposition: attachment; filename=$download_name.zip"); 515 516 $fp = @fopen("{$phpbb_root_path}store/$filename.zip", 'rb'); 517 if ($fp) 518 { 519 while ($buffer = fread($fp, 1024)) 520 { 521 echo $buffer; 522 } 523 fclose($fp); 524 } 525 } 526 } 527 528 /** 529 * Tar/tar.gz compression routine 530 * Header/checksum creation derived from tarfile.pl, (c) Tom Horsley, 1994 531 */ 532 class compress_tar extends compress 533 { 534 var $isgz = false; 535 var $isbz = false; 536 var $filename = ''; 537 var $mode = ''; 538 var $type = ''; 539 var $wrote = false; 540 541 /** 542 * Constructor 543 */ 544 function compress_tar($mode, $file, $type = '') 545 { 546 $type = (!$type) ? $file : $type; 547 $this->isgz = preg_match('#(\.tar\.gz|\.tgz)$#', $type); 548 $this->isbz = preg_match('#\.tar\.bz2$#', $type); 549 550 $this->mode = &$mode; 551 $this->file = &$file; 552 $this->type = &$type; 553 $this->open(); 554 } 555 556 /** 557 * Extract archive 558 */ 559 function extract($dst) 560 { 561 $fzread = ($this->isbz && function_exists('bzread')) ? 'bzread' : (($this->isgz && @extension_loaded('zlib')) ? 'gzread' : 'fread'); 562 563 // Run through the file and grab directory entries 564 while ($buffer = $fzread($this->fp, 512)) 565 { 566 $tmp = unpack('A6magic', substr($buffer, 257, 6)); 567 568 if (trim($tmp['magic']) == 'ustar') 569 { 570 $tmp = unpack('A100name', $buffer); 571 $filename = trim($tmp['name']); 572 573 $tmp = unpack('Atype', substr($buffer, 156, 1)); 574 $filetype = (int) trim($tmp['type']); 575 576 $tmp = unpack('A12size', substr($buffer, 124, 12)); 577 $filesize = octdec((int) trim($tmp['size'])); 578 579 $target_filename = "$dst$filename"; 580 581 if ($filetype == 5) 582 { 583 if (!is_dir($target_filename)) 584 { 585 $str = ''; 586 $folders = explode('/', $target_filename); 587 588 // Create and folders and subfolders if they do not exist 589 foreach ($folders as $folder) 590 { 591 $folder = trim($folder); 592 if (!$folder) 593 { 594 continue; 595 } 596 597 $str = (!empty($str)) ? $str . '/' . $folder : $folder; 598 if (!is_dir($str)) 599 { 600 if (!@mkdir($str, 0777)) 601 { 602 trigger_error("Could not create directory $folder"); 603 } 604 phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); 605 } 606 } 607 } 608 } 609 else if ($filesize >= 0 && ($filetype == 0 || $filetype == "\0")) 610 { 611 // Some archivers are punks, they don't properly order the folders in their archives! 612 $str = ''; 613 $folders = explode('/', pathinfo($target_filename, PATHINFO_DIRNAME)); 614 615 // Create and folders and subfolders if they do not exist 616 foreach ($folders as $folder) 617 { 618 $folder = trim($folder); 619 if (!$folder) 620 { 621 continue; 622 } 623 624 $str = (!empty($str)) ? $str . '/' . $folder : $folder; 625 if (!is_dir($str)) 626 { 627 if (!@mkdir($str, 0777)) 628 { 629 trigger_error("Could not create directory $folder"); 630 } 631 phpbb_chmod($str, CHMOD_READ | CHMOD_WRITE); 632 } 633 } 634 635 // Write out the files 636 if (!($fp = fopen($target_filename, 'wb'))) 637 { 638 trigger_error("Couldn't create file $filename"); 639 } 640 phpbb_chmod($target_filename, CHMOD_READ); 641 642 // Grab the file contents 643 fwrite($fp, ($filesize) ? $fzread($this->fp, ($filesize + 511) &~ 511) : '', $filesize); 644 fclose($fp); 645 } 646 } 647 } 648 } 649 650 /** 651 * Close archive 652 */ 653 function close() 654 { 655 $fzclose = ($this->isbz && function_exists('bzclose')) ? 'bzclose' : (($this->isgz && @extension_loaded('zlib')) ? 'gzclose' : 'fclose'); 656 657 if ($this->wrote) 658 { 659 $fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite'); 660 661 // The end of a tar archive ends in two records of all NULLs (1024 bytes of \0) 662 $fzwrite($this->fp, str_repeat("\0", 1024)); 663 } 664 665 $fzclose($this->fp); 666 } 667 668 /** 669 * Create the structures 670 */ 671 function data($name, $data, $stat, $is_dir = false) 672 { 673 $name = $this->unique_filename($name); 674 $this->wrote = true; 675 $fzwrite = ($this->isbz && function_exists('bzwrite')) ? 'bzwrite' : (($this->isgz && @extension_loaded('zlib')) ? 'gzwrite' : 'fwrite'); 676 677 $typeflag = ($is_dir) ? '5' : ''; 678 679 // This is the header data, it contains all the info we know about the file or folder that we are about to archive 680 $header = ''; 681 $header .= pack('a100', $name); // file name 682 $header .= pack('a8', sprintf("%07o", $stat[2])); // file mode 683 $header .= pack('a8', sprintf("%07o", $stat[4])); // owner id 684 $header .= pack('a8', sprintf("%07o", $stat[5])); // group id 685 $header .= pack('a12', sprintf("%011o", $stat[7])); // file size 686 $header .= pack('a12', sprintf("%011o", $stat[9])); // last mod time 687 688 // Checksum 689 $checksum = 0; 690 for ($i = 0; $i < 148; $i++) 691 { 692 $checksum += ord($header[$i]); 693 } 694 695 // We precompute the rest of the hash, this saves us time in the loop and allows us to insert our hash without resorting to string functions 696 $checksum += 2415 + (($is_dir) ? 53 : 0); 697 698 $header .= pack('a8', sprintf("%07o", $checksum)); // checksum 699 $header .= pack('a1', $typeflag); // link indicator 700 $header .= pack('a100', ''); // name of linked file 701 $header .= pack('a6', 'ustar'); // ustar indicator 702 $header .= pack('a2', '00'); // ustar version 703 $header .= pack('a32', 'Unknown'); // owner name 704 $header .= pack('a32', 'Unknown'); // group name 705 $header .= pack('a8', ''); // device major number 706 $header .= pack('a8', ''); // device minor number 707 $header .= pack('a155', ''); // filename prefix 708 $header .= pack('a12', ''); // end 709 710 // This writes the entire file in one shot. Header, followed by data and then null padded to a multiple of 512 711 $fzwrite($this->fp, $header . (($stat[7] !== 0 && !$is_dir) ? $data . str_repeat("\0", (($stat[7] + 511) &~ 511) - $stat[7]) : '')); 712 unset($data); 713 } 714 715 /** 716 * Open archive 717 */ 718 function open() 719 { 720 $fzopen = ($this->isbz && function_exists('bzopen')) ? 'bzopen' : (($this->isgz && @extension_loaded('zlib')) ? 'gzopen' : 'fopen'); 721 $this->fp = @$fzopen($this->file, $this->mode . (($fzopen == 'bzopen') ? '' : 'b') . (($fzopen == 'gzopen') ? '9' : '')); 722 723 if (!$this->fp) 724 { 725 trigger_error('Unable to open file ' . $this->file . ' [' . $fzopen . ' - ' . $this->mode . 'b]'); 726 } 727 } 728 729 /** 730 * Download archive 731 */ 732 function download($filename, $download_name = false) 733 { 734 global $phpbb_root_path; 735 736 if ($download_name === false) 737 { 738 $download_name = $filename; 739 } 740 741 switch ($this->type) 742 { 743 case '.tar': 744 $mimetype = 'application/x-tar'; 745 break; 746 747 case '.tar.gz': 748 $mimetype = 'application/x-gzip'; 749 break; 750 751 case '.tar.bz2': 752 $mimetype = 'application/x-bzip2'; 753 break; 754 755 default: 756 $mimetype = 'application/octet-stream'; 757 break; 758 } 759 760 header('Cache-Control: private, no-cache'); 761 header("Content-Type: $mimetype; name=\"$download_name$this->type\""); 762 header("Content-disposition: attachment; filename=$download_name$this->type"); 763 764 $fp = @fopen("{$phpbb_root_path}store/$filename$this->type", 'rb'); 765 if ($fp) 766 { 767 while ($buffer = fread($fp, 1024)) 768 { 769 echo $buffer; 770 } 771 fclose($fp); 772 } 773 } 774 }
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