--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/forum/Sources/Subs-Sound.php	Sun Jul 07 11:25:48 2013 +0200
@@ -0,0 +1,114 @@
+<?php
+
+/**
+ * Simple Machines Forum (SMF)
+ *
+ * @package SMF
+ * @author Simple Machines http://www.simplemachines.org
+ * @copyright 2011 Simple Machines
+ * @license http://www.simplemachines.org/about/smf/license.php BSD
+ *
+ * @version 2.0
+ */
+
+if (!defined('SMF'))
+	die('Hacking attempt...');
+
+/*	This file handles sound processing. In order to make sure the visual
+	verification is still accessible for all users, a sound clip is being addded
+	that reads the letters that are being shown.
+
+	void createWaveFile(string word)
+		- creates a wave file that spells the letters of 'word'.
+		- Tries the user's language first, and defaults to english.
+		- Returns false on failure.
+		- used by VerificationCode() (Register.php).
+*/
+
+function createWaveFile($word)
+{
+	global $settings, $user_info, $context;
+
+	// Allow max 2 requests per 20 seconds.
+	if (($ip = cache_get_data('wave_file/' . $user_info['ip'], 20)) > 2 || ($ip2 = cache_get_data('wave_file/' . $user_info['ip2'], 20)) > 2)
+		die(header('HTTP/1.1 400 Bad Request'));
+	cache_put_data('wave_file/' . $user_info['ip'], $ip ? $ip + 1 : 1, 20);
+	cache_put_data('wave_file/' . $user_info['ip2'], $ip2 ? $ip2 + 1 : 1, 20);
+
+	// Fixate randomization for this word.
+	mt_srand(end(unpack('n', md5($word . session_id()))));
+
+	// Try to see if there's a sound font in the user's language.
+	if (file_exists($settings['default_theme_dir'] . '/fonts/sound/a.' . $user_info['language'] . '.wav'))
+		$sound_language = $user_info['language'];
+
+	// English should be there.
+	elseif (file_exists($settings['default_theme_dir'] . '/fonts/sound/a.english.wav'))
+		$sound_language = 'english';
+
+	// Guess not...
+	else
+		return false;
+
+	// File names are in lower case so lets make sure that we are only using a lower case string
+	$word = strtolower($word);
+
+	// Loop through all letters of the word $word.
+	$sound_word = '';
+	for ($i = 0; $i < strlen($word); $i++)
+	{
+		$sound_letter = implode('', file($settings['default_theme_dir'] . '/fonts/sound/' . $word{$i} . '.' . $sound_language . '.wav'));
+		if (strpos($sound_letter, 'data') === false)
+			return false;
+
+		$sound_letter = substr($sound_letter, strpos($sound_letter, 'data') + 8);
+		switch ($word{$i} === 's' ? 0 : mt_rand(0, 2))
+		{
+			case 0:
+				for ($j = 0, $n = strlen($sound_letter); $j < $n; $j++)
+					for ($k = 0, $m = round(mt_rand(15, 25) / 10); $k < $m; $k++)
+						$sound_word .= $word{$i} === 's' ? $sound_letter{$j} : chr(mt_rand(max(ord($sound_letter{$j}) - 1, 0x00), min(ord($sound_letter{$j}) + 1, 0xFF)));
+			break;
+
+			case 1:
+				for ($j = 0, $n = strlen($sound_letter) - 1; $j < $n; $j += 2)
+					$sound_word .= (mt_rand(0, 3) == 0 ? '' : $sound_letter{$j}) . (mt_rand(0, 3) === 0 ? $sound_letter{$j + 1} : $sound_letter{$j}) . (mt_rand(0, 3) === 0 ? $sound_letter{$j} : $sound_letter{$j + 1}) . $sound_letter{$j + 1} . (mt_rand(0, 3) == 0 ? $sound_letter{$j + 1} : '');
+				$sound_word .= str_repeat($sound_letter{$n}, 2);
+			break;
+
+			case 2:
+				$shift = 0;
+				for ($j = 0, $n = strlen($sound_letter); $j < $n; $j++)
+				{
+					if (mt_rand(0, 10) === 0)
+						$shift += mt_rand(-3, 3);
+					for ($k = 0, $m = round(mt_rand(15, 25) / 10); $k < $m; $k++)
+						$sound_word .= chr(min(max(ord($sound_letter{$j}) + $shift, 0x00), 0xFF));
+				}
+			break;
+
+		}
+
+		$sound_word .= str_repeat(chr(0x80), mt_rand(10000, 10500));
+	}
+
+	$data_size = strlen($sound_word);
+	$file_size = $data_size + 0x24;
+	$sample_rate = 16000;
+
+	// Disable compression.
+	ob_end_clean();
+	header('Content-Encoding: none');
+
+	// Output the wav.
+	header('Content-type: audio/x-wav');
+	header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 525600 * 60) . ' GMT');
+	header('Content-Length: ' . ($file_size + 0x08));
+
+	echo pack('nnVnnnnnnnnVVnnnnV', 0x5249, 0x4646, $file_size, 0x5741, 0x5645, 0x666D, 0x7420, 0x1000, 0x0000, 0x0100, 0x0100, $sample_rate, $sample_rate, 0x0100, 0x0800, 0x6461, 0x7461, $data_size), $sound_word;
+
+	// Noting more to add.
+	die();
+}
+
+?>
\ No newline at end of file