diff options
Diffstat (limited to 'modules/getid3/module.lib.data_hash.php')
-rw-r--r-- | modules/getid3/module.lib.data_hash.php | 60 |
1 files changed, 30 insertions, 30 deletions
diff --git a/modules/getid3/module.lib.data_hash.php b/modules/getid3/module.lib.data_hash.php index 4ec541c6..00032db8 100644 --- a/modules/getid3/module.lib.data_hash.php +++ b/modules/getid3/module.lib.data_hash.php @@ -26,23 +26,23 @@ class getid3_lib_data_hash { - + private $getid3; - - + + // constructer - calculate md5/sha1 data public function __construct(getID3 $getid3, $algorithm) { - + $this->getid3 = $getid3; - + // Check algorithm if (!preg_match('/^(md5|sha1)$/', $algorithm)) { throw new getid3_exception('Unsupported algorithm, "'.$algorithm.'", in GetHashdata()'); } - - + + //// Handle ogg vorbis files - + if ((@$getid3->info['fileformat'] == 'ogg') && (@$getid3->info['audio']['dataformat'] == 'vorbis')) { // We cannot get an identical md5_data value for Ogg files where the comments @@ -66,11 +66,11 @@ class getid3_lib_data_hash if ((bool)ini_get('safe_mode')) { throw new getid3_exception('PHP running in Safe Mode - cannot make system call to vorbiscomment[.exe] needed for '.$algorithm.'_data.'); } - + if (!preg_match('/^Vorbiscomment /', `vorbiscomment --version 2>&1`)) { throw new getid3_exception('vorbiscomment[.exe] binary not found in path. UNIX: typically /usr/bin. Windows: typically c:\windows\system32.'); } - + // Prevent user from aborting script $old_abort = ignore_user_abort(true); @@ -80,13 +80,13 @@ class getid3_lib_data_hash // Use vorbiscomment to make temp file without comments $temp = tempnam('*', 'getID3'); - + $command_line = 'vorbiscomment -w -c '.escapeshellarg($empty).' '.escapeshellarg(realpath($getid3->filename)).' '.escapeshellarg($temp).' 2>&1'; // Error from vorbiscomment if ($vorbis_comment_error = `$command_line`) { throw new getid3_exception('System call to vorbiscomment[.exe] failed.'); - } + } // Get hash of newly created file $hash_function = $algorithm . '_file'; @@ -98,16 +98,16 @@ class getid3_lib_data_hash // Reset abort setting ignore_user_abort($old_abort); - + // Return success return true; } //// Handle other file formats - + // Get hash from part of file if (@$getid3->info['avdataoffset'] || (@$getid3->info['avdataend'] && @$getid3->info['avdataend'] < $getid3->info['filesize'])) { - + if ((bool)ini_get('safe_mode')) { $getid3->warning('PHP running in Safe Mode - backtick operator not available, using slower non-system-call '.$algorithm.' algorithm.'); $hash_function = 'hash_file_partial_safe_mode'; @@ -115,52 +115,52 @@ class getid3_lib_data_hash else { $hash_function = 'hash_file_partial'; } - + $getid3->info[$algorithm.'_data'] = $this->$hash_function($getid3->filename, $getid3->info['avdataoffset'], $getid3->info['avdataend'], $algorithm); - } - + } + // Get hash from whole file - use built-in md5_file() and sha1_file() else { $hash_function = $algorithm . '_file'; $getid3->info[$algorithm.'_data'] = $hash_function($getid3->filename); } } - - - + + + // Return md5/sha1sum for a file from starting position to absolute end position // Using windows system call private function hash_file_partial($file, $offset, $end, $algorithm) { - + // It seems that sha1sum.exe for Windows only works on physical files, does not accept piped data // Fall back to create-temp-file method: if ($algorithm == 'sha1' && strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') { return $this->hash_file_partial_safe_mode($file, $offset, $end, $algorithm); } - + // Check for presence of binaries and revert to safe mode if not found if (!`head --version`) { return $this->hash_file_partial_safe_mode($file, $offset, $end, $algorithm); } - + if (!`tail --version`) { return $this->hash_file_partial_safe_mode($file, $offset, $end, $algorithm); } - + if (!`${algorithm}sum --version`) { return $this->hash_file_partial_safe_mode($file, $offset, $end, $algorithm); - } - + } + $size = $end - $offset; $command_line = 'head -c'.$end.' '.escapeshellarg(realpath($file)).' | tail -c'.$size.' | '.$algorithm.'sum'; return substr(`$command_line`, 0, $algorithm == 'md5' ? 32 : 40); } - - + + // Return md5/sha1sum for a file from starting position to absolute end position // Using slow safe_mode temp file - private function hash_file_partial_safe_mode($file, $offset, $end, $algorithm) { + private function hash_file_partial_safe_mode($file, $offset, $end, $algorithm) { // Attempt to create a temporary file in the system temp directory - invalid dirname should force to system temp dir if (($data_filename = tempnam('*', 'getID3')) === false) { |