Software: Apache/2.2.3 (CentOS). PHP/5.1.6 uname -a: Linux mx-ll-110-164-51-230.static.3bb.co.th 2.6.18-194.el5PAE #1 SMP Fri Apr 2 15:37:44 uid=48(apache) gid=48(apache) groups=48(apache) Safe-mode: OFF (not secure) /var/www/html/phpMyAdmin/libraries/ drwxr-xr-x |
Viewing file: Select action/file-type: <?php /* $Id: ip_allow_deny.lib.php,v 2.7.2.1 2006/04/11 16:33:33 cybot_tm Exp $ */ // vim: expandtab sw=4 ts=4 sts=4: /** * This library is used with the server IP allow/deny host authentication * feature */ /** * Gets the "true" IP address of the current user * * @return string the ip of the user * * @access private */ function PMA_getIp() { global $REMOTE_ADDR; global $HTTP_X_FORWARDED_FOR, $HTTP_X_FORWARDED, $HTTP_FORWARDED_FOR, $HTTP_FORWARDED; global $HTTP_VIA, $HTTP_X_COMING_FROM, $HTTP_COMING_FROM; // Get some server/environment variables values if (empty($REMOTE_ADDR) && PMA_getenv('REMOTE_ADDR')) { $REMOTE_ADDR = PMA_getenv('REMOTE_ADDR'); } if (empty($HTTP_X_FORWARDED_FOR) && PMA_getenv('HTTP_X_FORWARDED_FOR')) { $HTTP_X_FORWARDED_FOR = PMA_getenv('HTTP_X_FORWARDED_FOR'); } if (empty($HTTP_X_FORWARDED) && PMA_getenv('HTTP_X_FORWARDED')) { $HTTP_X_FORWARDED = PMA_getenv('HTTP_X_FORWARDED'); } if (empty($HTTP_FORWARDED_FOR) && PMA_getenv('HTTP_FORWARDED_FOR')) { $HTTP_FORWARDED_FOR = PMA_getenv('HTTP_FORWARDED_FOR'); } if (empty($HTTP_FORWARDED) && PMA_getenv('HTTP_FORWARDED')) { $HTTP_FORWARDED = PMA_getenv('HTTP_FORWARDED'); } if (empty($HTTP_VIA) && PMA_getenv('HTTP_VIA')) { $HTTP_VIA = PMA_getenv('HTTP_VIA'); } if (empty($HTTP_X_COMING_FROM) && PMA_getenv('HTTP_X_COMING_FROM')) { $HTTP_X_COMING_FROM = PMA_getenv('HTTP_X_COMING_FROM'); } if (empty($HTTP_COMING_FROM) && PMA_getenv('HTTP_COMING_FROM')) { $HTTP_COMING_FROM = PMA_getenv('HTTP_COMING_FROM'); } // Gets the default ip sent by the user if (!empty($REMOTE_ADDR)) { $direct_ip = $REMOTE_ADDR; } // Gets the proxy ip sent by the user $proxy_ip = ''; if (!empty($HTTP_X_FORWARDED_FOR)) { $proxy_ip = $HTTP_X_FORWARDED_FOR; } elseif (!empty($HTTP_X_FORWARDED)) { $proxy_ip = $HTTP_X_FORWARDED; } elseif (!empty($HTTP_FORWARDED_FOR)) { $proxy_ip = $HTTP_FORWARDED_FOR; } elseif (!empty($HTTP_FORWARDED)) { $proxy_ip = $HTTP_FORWARDED; } elseif (!empty($HTTP_VIA)) { $proxy_ip = $HTTP_VIA; } elseif (!empty($HTTP_X_COMING_FROM)) { $proxy_ip = $HTTP_X_COMING_FROM; } elseif (!empty($HTTP_COMING_FROM)) { $proxy_ip = $HTTP_COMING_FROM; } // end if... elseif... // Returns the true IP if it has been found, else FALSE if (empty($proxy_ip)) { // True IP without proxy return $direct_ip; } else { $is_ip = preg_match('|^([0-9]{1,3}\.){3,3}[0-9]{1,3}|', $proxy_ip, $regs); if ($is_ip && (count($regs) > 0)) { // True IP behind a proxy return $regs[0]; } else { // Can't define IP: there is a proxy but we don't have // information about the true IP return FALSE; } } // end if... else... } // end of the 'PMA_getIp()' function /** * Based on IP Pattern Matcher * Originally by J.Adams <jna@retina.net> * Found on <http://www.php.net/manual/en/function.ip2long.php> * Modified by Robbat2 <robbat2@users.sourceforge.net> * * Matches: * xxx.xxx.xxx.xxx (exact) * xxx.xxx.xxx.[yyy-zzz] (range) * xxx.xxx.xxx.xxx/nn (CIDR) * * Does not match: * xxx.xxx.xxx.xx[yyy-zzz] (range, partial octets not supported) * * @param string string of IP range to match * @param string string of IP to test against range * * @return boolean always true * * @access public */ function PMA_ipMaskTest($testRange, $ipToTest) { $result = TRUE; if (preg_match('|([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/([0-9]+)|', $testRange, $regs)) { // performs a mask match $ipl = ip2long($ipToTest); $rangel = ip2long($regs[1] . '.' . $regs[2] . '.' . $regs[3] . '.' . $regs[4]); $maskl = 0; for ($i = 0; $i < 31; $i++) { if ($i < $regs[5] - 1) { $maskl = $maskl + pow(2, (30 - $i)); } // end if } // end for if (($maskl & $rangel) == ($maskl & $ipl)) { return TRUE; } else { return FALSE; } } else { // range based $maskocts = explode('.', $testRange); $ipocts = explode('.', $ipToTest); // perform a range match for ($i = 0; $i < 4; $i++) { if (preg_match('|\[([0-9]+)\-([0-9]+)\]|', $maskocts[$i], $regs)) { if (($ipocts[$i] > $regs[2]) || ($ipocts[$i] < $regs[1])) { $result = FALSE; } // end if } else { if ($maskocts[$i] <> $ipocts[$i]) { $result = FALSE; } // end if } // end if/else } //end for } //end if/else return $result; } // end of the "PMA_IPMaskTest()" function /** * Runs through IP Allow/Deny rules the use of it below for more information * * @param string 'allow' | 'deny' type of rule to match * * @return bool Matched a rule ? * * @access public * * @see PMA_getIp() */ function PMA_allowDeny($type) { global $cfg; // Grabs true IP of the user and returns if it can't be found $remote_ip = PMA_getIp(); if (empty($remote_ip)) { return FALSE; } // copy username $username = $cfg['Server']['user']; // copy rule database $rules = $cfg['Server']['AllowDeny']['rules']; // lookup table for some name shortcuts $shortcuts = array( 'all' => '0.0.0.0/0', 'localhost' => '127.0.0.1/8' ); // Provide some useful shortcuts if server gives us address: if (PMA_getenv('SERVER_ADDR')) { $shortcuts['localnetA'] = PMA_getenv('SERVER_ADDR') . '/8'; $shortcuts['localnetB'] = PMA_getenv('SERVER_ADDR') . '/16'; $shortcuts['localnetC'] = PMA_getenv('SERVER_ADDR') . '/24'; } foreach ($rules AS $rule) { // extract rule data $rule_data = explode(' ', $rule); // check for rule type if ($rule_data[0] != $type) { continue; } // check for username if (($rule_data[1] != '%') //wildcarded first && ($rule_data[1] != $username)) { continue; } // check if the config file has the full string with an extra // 'from' in it and if it does, just discard it if ($rule_data[2] == 'from') { $rule_data[2] = $rule_data[3]; } // Handle shortcuts with above array // DON'T use "array_key_exists" as it's only PHP 4.1 and newer. if (isset($shortcuts[$rule_data[2]])) { $rule_data[2] = $shortcuts[$rule_data[2]]; } // Add code for host lookups here // Excluded for the moment // Do the actual matching now if (PMA_ipMaskTest($rule_data[2], $remote_ip)) { return TRUE; } } // end while return FALSE; } // end of the "PMA_AllowDeny()" function ?> |
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