160 lines
3.5 KiB
PHP
160 lines
3.5 KiB
PHP
<?php
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// $file: $_FILES array entry for the .tgkr file
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// returns true if the replay file is valid,
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// false if the replay should be ignored, and errors out in all other cases.
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function oekaki_validate_replay($file) {
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$max_size = 8 * 1024 * 1024;
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$max_data_size = 18 * 1024 * 1024; // uncompresed size
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if ($file['error'] > 0) {
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error(S_FAILEDUPLOAD);
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}
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if ($file['size'] === 0) {
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error(S_NOREC);
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}
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if ($file['size'] > $max_size) {
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error(S_TOOLARGE);
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}
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$tmp_file = $file['tmp_name'];
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if (is_uploaded_file($tmp_file) !== true) {
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error(S_FAILEDUPLOAD);
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}
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// Check the actual data now
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$f = fopen($tmp_file, 'rb');
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$magic = fread($f, 4);
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$decompressed_size = fread($f, 4);
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fread($f, 4); // version numbers
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$compressed_data = fread($f, $file['size'] - 12);
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fclose($f);
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if ($magic !== "\x54\x47\x4B\x01") { // TGK 0x01
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error(S_NOREC);
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}
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$decompressed_size = (int)unpack('N', $decompressed_size)[1];
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if (!$decompressed_size || $decompressed_size <= 0) {
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error(S_NOREC);
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}
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if ($decompressed_size > $max_data_size) {
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return false;
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}
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if (!$compressed_data) {
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error(S_NOREC);
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}
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$data = gzinflate($compressed_data, $decompressed_size);
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if ($data === false) {
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error(S_NOREC);
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}
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$meta_size = (int)unpack('n', $data)[1];
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if (!$meta_size) {
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return false;
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}
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// tool count (byte), tool entry size (byte)
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$tool_meta = unpack('C2', substr($data, $meta_size, 2));
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if (!$tool_meta || !(int)$tool_meta[1] || !(int)$tool_meta[2]) {
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return false;
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}
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$events_pos = $meta_size + ((int)$tool_meta[1]) * ((int)$tool_meta[2]) + 2;
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$event_count = (int)unpack('N', substr($data, $events_pos, 4))[1];
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if (!$event_count || $event_count > 12000000) {
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return false;
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}
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$prelude_type = unpack('C', substr($data, $events_pos + 4, 1));
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if ($prelude_type === false || (int)$prelude_type[1] !== 0) {
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return false;
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}
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$conclusion_type = unpack('C', substr($data, -5, 1));
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if ($conclusion_type === false || (int)$conclusion_type[1] !== 255) {
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return false;
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}
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return true;
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}
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function oekaki_get_valid_src_pid($src_pid, $board, $thread_id) {
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$src_pid = (int)$src_pid;
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if ($src_pid < 1) {
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return null;
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}
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$thread_id = (int)$thread_id;
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if ($thread_id < 1) {
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return null;
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}
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$sql = "SELECT no FROM `%s` WHERE no = $src_pid AND (resto = $thread_id OR resto = 0) AND tim != 0 LIMIT 1";
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$res = mysql_board_call($sql, $board);
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if (!$res || mysql_num_rows($res) !== 1) {
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return null;
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}
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return $src_pid;
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}
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function oekaki_format_info($time, $replay_tim, $src_pid) {
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$time = (int)$time;
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if ($time < 1 || $time > 5184000) { // 60 days
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return '';
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}
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if ($time < 60) {
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$time_str = $time . 's';
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}
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else if ($time < 3600) {
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$time_str = round($time / 60) . 'm';
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}
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else {
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$time_str = (int)($time / 3600) . 'h ' . round(($time % 3600) / 60) . 'm';
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}
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if ($replay_tim && !$src_pid) {
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$replay_tim = (int)$replay_tim;
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$replay_link = ", Replay: <a href=\"javascript:oeReplay($replay_tim);\">View</a>";
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}
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else {
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$replay_link = '';
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}
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if ($src_pid) {
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$src_pid = (int)$src_pid;
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$src_link = ", Source: >>$src_pid";
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}
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else {
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$src_link = '';
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}
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return "<br><br><small><b>Oekaki Post</b> (Time: $time_str" . $replay_link . $src_link . ")</small>";
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}
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