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| -rw-r--r-- | include/email.php | 364 |
diff --git a/include/email.php b/include/email.php new file mode 100644 index 0000000..b66b584 --- /dev/null +++ b/include/email.php @@ -0,0 +1,364 @@ +<?php + +/** + * Copyright (C) 2008-2012 FluxBB + * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB + * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher + */ + +// Make sure no one attempts to run this script "directly" +if (!defined('PUN')) + exit; + +// Define line breaks in mail headers; possible values can be PHP_EOL, "\r\n", "\n" or "\r" +if (!defined('FORUM_EOL')) + define('FORUM_EOL', PHP_EOL); + +require PUN_ROOT.'include/utf8/utils/ascii.php'; + +// +// Validate an email address +// +function is_valid_email($email) +{ + if (strlen($email) > 80) + return false; + + return preg_match('%^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|("[^"]+"))@((\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\])|(([a-zA-Z\d\-]+\.)+[a-zA-Z]{2,}))$%', $email); +} + + +// +// Check if $email is banned +// +function is_banned_email($email) +{ + global $pun_bans; + + foreach ($pun_bans as $cur_ban) + { + if ($cur_ban['email'] != '' && + ($email == $cur_ban['email'] || + (strpos($cur_ban['email'], '@') === false && stristr($email, '@'.$cur_ban['email'])))) + return true; + } + + return false; +} + + +// +// Only encode with base64, if there is at least one unicode character in the string +// +function encode_mail_text($str) +{ + if (utf8_is_ascii($str)) + return $str; + + return '=?UTF-8?B?'.base64_encode($str).'?='; +} + + +// +// Make a post email safe +// +function bbcode2email($text, $wrap_length = 72) +{ + static $base_url; + + if (!isset($base_url)) + $base_url = get_base_url(); + + $text = pun_trim($text, "\t\n "); + + $shortcut_urls = array( + 'topic' => '/viewtopic.php?id=$1', + 'post' => '/viewtopic.php?pid=$1#p$1', + 'forum' => '/viewforum.php?id=$1', + 'user' => '/profile.php?id=$1', + ); + + // Split code blocks and text so BBcode in codeblocks won't be touched + list($code, $text) = extract_blocks($text, '[code]', '[/code]'); + + // Strip all bbcodes, except the quote, url, img, email, code and list items bbcodes + $text = preg_replace(array( + '%\[/?(?!(?:quote|url|topic|post|user|forum|img|email|code|list|\*))[a-z]+(?:=[^\]]+)?\]%i', + '%\n\[/?list(?:=[^\]]+)?\]%i' // A separate regex for the list tags to get rid of some whitespace + ), '', $text); + + // Match the deepest nested bbcode + // An adapted example from Mastering Regular Expressions + $match_quote_regex = '% + \[(quote|\*|url|img|email|topic|post|user|forum)(?:=([^\]]+))?\] + ( + (?>[^\[]*) + (?> + (?!\[/?\1(?:=[^\]]+)?\]) + \[ + [^\[]* + )* + ) + \[/\1\] + %ix'; + + $url_index = 1; + $url_stack = array(); + while (preg_match($match_quote_regex, $text, $matches)) + { + // Quotes + if ($matches[1] == 'quote') + { + // Put '>' or '> ' at the start of a line + $replacement = preg_replace( + array('%^(?=\>)%m', '%^(?!\>)%m'), + array('>', '> '), + $matches[2].":\n".$matches[3]); + } + + // List items + elseif ($matches[1] == '*') + { + $replacement = ' * '.$matches[3]; + } + + // URLs and emails + elseif (in_array($matches[1], array('url', 'email'))) + { + if (!empty($matches[2])) + { + $replacement = '['.$matches[3].']['.$url_index.']'; + $url_stack[$url_index] = $matches[2]; + $url_index++; + } + else + $replacement = '['.$matches[3].']'; + } + + // Images + elseif ($matches[1] == 'img') + { + if (!empty($matches[2])) + $replacement = '['.$matches[2].']['.$url_index.']'; + else + $replacement = '['.basename($matches[3]).']['.$url_index.']'; + + $url_stack[$url_index] = $matches[3]; + $url_index++; + } + + // Topic, post, forum and user URLs + elseif (in_array($matches[1], array('topic', 'post', 'forum', 'user'))) + { + $url = isset($shortcut_urls[$matches[1]]) ? $base_url.$shortcut_urls[$matches[1]] : ''; + + if (!empty($matches[2])) + { + $replacement = '['.$matches[3].']['.$url_index.']'; + $url_stack[$url_index] = str_replace('$1', $matches[2], $url); + $url_index++; + } + else + $replacement = '['.str_replace('$1', $matches[3], $url).']'; + } + + // Update the main text if there is a replacement + if (!is_null($replacement)) + { + $text = str_replace($matches[0], $replacement, $text); + $replacement = null; + } + } + + // Put code blocks and text together + if (isset($code)) + { + $parts = explode("\1", $text); + $text = ''; + foreach ($parts as $i => $part) + { + $text .= $part; + if (isset($code[$i])) + $text .= trim($code[$i], "\n\r"); + } + } + + // Put URLs at the bottom + if ($url_stack) + { + $text .= "\n\n"; + foreach ($url_stack as $i => $url) + $text .= "\n".' ['.$i.']: '.$url; + } + + // Wrap lines if $wrap_length is higher than -1 + if ($wrap_length > -1) + { + // Split all lines and wrap them individually + $parts = explode("\n", $text); + foreach ($parts as $k => $part) + { + preg_match('%^(>+ )?(.*)%', $part, $matches); + $parts[$k] = wordwrap($matches[1].$matches[2], $wrap_length - + strlen($matches[1]), "\n".$matches[1]); + } + + return implode("\n", $parts); + } + else + return $text; +} + + +// +// Wrapper for PHP's mail() +// +function pun_mail($to, $subject, $message, $reply_to_email = '', $reply_to_name = '') +{ + global $pun_config, $lang_common; + + // Use \r\n for SMTP servers, the system's line ending for local mailers + $smtp = $pun_config['o_smtp_host'] != ''; + $EOL = $smtp ? "\r\n" : FORUM_EOL; + + // Default sender/return address + $from_name = sprintf($lang_common['Mailer'], $pun_config['o_board_title']); + $from_email = $pun_config['o_webmaster_email']; + + // Do a little spring cleaning + $to = pun_trim(preg_replace('%[\n\r]+%s', '', $to)); + $subject = pun_trim(preg_replace('%[\n\r]+%s', '', $subject)); + $from_email = pun_trim(preg_replace('%[\n\r:]+%s', '', $from_email)); + $from_name = pun_trim(preg_replace('%[\n\r:]+%s', '', str_replace('"', '', $from_name))); + $reply_to_email = pun_trim(preg_replace('%[\n\r:]+%s', '', $reply_to_email)); + $reply_to_name = pun_trim(preg_replace('%[\n\r:]+%s', '', str_replace('"', '', $reply_to_name))); + + // Set up some headers to take advantage of UTF-8 + $from = '"'.encode_mail_text($from_name).'" <'.$from_email.'>'; + $subject = encode_mail_text($subject); + + $headers = 'From: '.$from.$EOL.'Date: '.gmdate('r').$EOL.'MIME-Version: 1.0'.$EOL.'Content-transfer-encoding: 8bit'.$EOL.'Content-type: text/plain; charset=utf-8'.$EOL.'X-Mailer: FluxBB Mailer'; + + // If we specified a reply-to email, we deal with it here + if (!empty($reply_to_email)) + { + $reply_to = '"'.encode_mail_text($reply_to_name).'" <'.$reply_to_email.'>'; + + $headers .= $EOL.'Reply-To: '.$reply_to; + } + + // Make sure all linebreaks are LF in message (and strip out any NULL bytes) + $message = str_replace("\0", '', pun_linebreaks($message)); + $message = str_replace("\n", $EOL, $message); + + $mailer = $smtp ? 'smtp_mail' : 'mail'; + $mailer($to, $subject, $message, $headers); +} + + +// +// This function was originally a part of the phpBB Group forum software phpBB2 (http://www.phpbb.com) +// They deserve all the credit for writing it. I made small modifications for it to suit PunBB and its coding standards +// +function server_parse($socket, $expected_response) +{ + $server_response = ''; + while (substr($server_response, 3, 1) != ' ') + { + if (!($server_response = fgets($socket, 256))) + error('Couldn\'t get mail server response codes. Please contact the forum administrator.', __FILE__, __LINE__); + } + + if (!(substr($server_response, 0, 3) == $expected_response)) + error('Unable to send email. Please contact the forum administrator with the following error message reported by the SMTP server: "'.$server_response.'"', __FILE__, __LINE__); +} + + +// +// This function was originally a part of the phpBB Group forum software phpBB2 (http://www.phpbb.com) +// They deserve all the credit for writing it. I made small modifications for it to suit PunBB and its coding standards. +// +function smtp_mail($to, $subject, $message, $headers = '') +{ + global $pun_config; + static $local_host; + + $recipients = explode(',', $to); + + // Sanitize the message + $message = str_replace("\r\n.", "\r\n..", $message); + $message = (substr($message, 0, 1) == '.' ? '.'.$message : $message); + + // Are we using port 25 or a custom port? + if (strpos($pun_config['o_smtp_host'], ':') !== false) + list($smtp_host, $smtp_port) = explode(':', $pun_config['o_smtp_host']); + else + { + $smtp_host = $pun_config['o_smtp_host']; + $smtp_port = 25; + } + + if ($pun_config['o_smtp_ssl'] == '1') + $smtp_host = 'ssl://'.$smtp_host; + + if (!($socket = fsockopen($smtp_host, $smtp_port, $errno, $errstr, 15))) + error('Could not connect to smtp host "'.$pun_config['o_smtp_host'].'" ('.$errno.') ('.$errstr.')', __FILE__, __LINE__); + + server_parse($socket, '220'); + + if (!isset($local_host)) + { + // Here we try to determine the *real* hostname (reverse DNS entry preferably) + $local_host = php_uname('n'); + + // Able to resolve name to IP + if (($local_addr = @gethostbyname($local_host)) !== $local_host) + { + // Able to resolve IP back to name + if (($local_name = @gethostbyaddr($local_addr)) !== $local_addr) + $local_host = $local_name; + } + } + + if ($pun_config['o_smtp_user'] != '' && $pun_config['o_smtp_pass'] != '') + { + fwrite($socket, 'EHLO '.$local_host."\r\n"); + server_parse($socket, '250'); + + fwrite($socket, 'AUTH LOGIN'."\r\n"); + server_parse($socket, '334'); + + fwrite($socket, base64_encode($pun_config['o_smtp_user'])."\r\n"); + server_parse($socket, '334'); + + fwrite($socket, base64_encode($pun_config['o_smtp_pass'])."\r\n"); + server_parse($socket, '235'); + } + else + { + fwrite($socket, 'HELO '.$local_host."\r\n"); + server_parse($socket, '250'); + } + + fwrite($socket, 'MAIL FROM: <'.$pun_config['o_webmaster_email'].'>'."\r\n"); + server_parse($socket, '250'); + + foreach ($recipients as $email) + { + fwrite($socket, 'RCPT TO: <'.$email.'>'."\r\n"); + server_parse($socket, '250'); + } + + fwrite($socket, 'DATA'."\r\n"); + server_parse($socket, '354'); + + fwrite($socket, 'Subject: '.$subject."\r\n".'To: <'.implode('>, <', $recipients).'>'."\r\n".$headers."\r\n\r\n".$message."\r\n"); + + fwrite($socket, '.'."\r\n"); + server_parse($socket, '250'); + + fwrite($socket, 'QUIT'."\r\n"); + fclose($socket); + + return true; +} |