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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Server config checks management
*
* @package PhpMyAdmin
*/
/**
* Performs various compatibility, security and consistency checks on current config
*
* Outputs results to message list, must be called between PMA_messagesBegin()
* and PMA_messagesEnd()
*
* @package PhpMyAdmin
*/
class ServerConfigChecks
{
/**
* @var ConfigFile configurations being checked
*/
protected $cfg;
/**
* Constructor.
*
* @param ConfigFile $cfg Configuration
*/
public function __construct(ConfigFile $cfg)
{
$this->cfg = $cfg;
}
/**
* Perform config checks
*
* @return void
*/
public function performConfigChecks()
{
$blowfishSecret = $this->cfg->get('blowfish_secret');
$blowfishSecretSet = false;
$cookieAuthUsed = false;
list(
$sAllowArbitraryServerWarn, $sBlowfishSecretMsg,
$sBZipDumpWarn, $sDirectoryNotice, $sForceSSLNotice,
$sGZipDumpWarn, $sLoginCookieValidityWarn,
$sLoginCookieValidityWarn2, $sLoginCookieValidityWarn3,
$sSecurityInfoMsg, $sSrvAuthCfgMsg, $sZipDumpExportWarn,
$sZipDumpImportWarn
) = self::defineMessages();
list($cookieAuthUsed, $blowfishSecret, $blowfishSecretSet)
= $this->performConfigChecksServers(
$cookieAuthUsed, $blowfishSecret, $sSrvAuthCfgMsg,
$sSecurityInfoMsg, $blowfishSecretSet
);
$this->performConfigChecksCookieAuthUsed(
$cookieAuthUsed, $blowfishSecretSet, $sBlowfishSecretMsg,
$blowfishSecret
);
//
// $cfg['ForceSSL']
// should be enabled if possible
//
if (!$this->cfg->getValue('ForceSSL')) {
PMA_messagesSet(
'notice',
'ForceSSL',
PMA_lang(PMA_langName('ForceSSL')),
PMA_lang($sForceSSLNotice)
);
}
//
// $cfg['AllowArbitraryServer']
// should be disabled
//
if ($this->cfg->getValue('AllowArbitraryServer')) {
PMA_messagesSet(
'notice',
'AllowArbitraryServer',
PMA_lang(PMA_langName('AllowArbitraryServer')),
PMA_lang($sAllowArbitraryServerWarn)
);
}
$this->performConfigChecksLoginCookie(
$sLoginCookieValidityWarn, $sLoginCookieValidityWarn2,
$sLoginCookieValidityWarn3
);
//
// $cfg['SaveDir']
// should not be world-accessible
//
if ($this->cfg->getValue('SaveDir') != '') {
PMA_messagesSet(
'notice',
'SaveDir',
PMA_lang(PMA_langName('SaveDir')),
PMA_lang($sDirectoryNotice)
);
}
//
// $cfg['TempDir']
// should not be world-accessible
//
if ($this->cfg->getValue('TempDir') != '') {
PMA_messagesSet(
'notice',
'TempDir',
PMA_lang(PMA_langName('TempDir')),
PMA_lang($sDirectoryNotice)
);
}
$this->performConfigChecksZips(
$sGZipDumpWarn, $sBZipDumpWarn, $sZipDumpImportWarn,
$sZipDumpExportWarn
);
}
/**
* Check config of servers
*
* @param boolean $cookieAuthUsed Cookie auth is used
* @param string $blowfishSecret Blowfish secret
* @param string $sServerAuthCfgMsg Message for server auth config
* @param string $sSecurityInfoMsg Message for security information
* @param boolean $blowfishSecretSet Blowfish secret set
*
* @return array
*/
protected function performConfigChecksServers(
$cookieAuthUsed, $blowfishSecret, $sServerAuthCfgMsg,
$sSecurityInfoMsg, $blowfishSecretSet
) {
$serverCnt = $this->cfg->getServerCount();
for ($i = 1; $i <= $serverCnt; $i++) {
$cookieAuthServer
= ($this->cfg->getValue("Servers/$i/auth_type") == 'cookie');
$cookieAuthUsed |= $cookieAuthServer;
$serverName = $this->performConfigChecksServersGetServerName(
$this->cfg->getServerName($i), $i
);
$serverName = htmlspecialchars($serverName);
list($blowfishSecret, $blowfishSecretSet)
= $this->performConfigChecksServersSetBlowfishSecret(
$blowfishSecret, $cookieAuthServer, $blowfishSecretSet
);
//
// $cfg['Servers'][$i]['ssl']
// should be enabled if possible
//
if (!$this->cfg->getValue("Servers/$i/ssl")) {
$title = PMA_lang(PMA_langName('Servers/1/ssl')) . " ($serverName)";
PMA_messagesSet(
'notice',
"Servers/$i/ssl",
$title,
__('You should use SSL connections if your database server supports it.')
);
}
//
// $cfg['Servers'][$i]['auth_type']
// warn about full user credentials if 'auth_type' is 'config'
//
if ($this->cfg->getValue("Servers/$i/auth_type") == 'config'
&& $this->cfg->getValue("Servers/$i/user") != ''
&& $this->cfg->getValue("Servers/$i/password") != ''
) {
$title = PMA_lang(PMA_langName('Servers/1/auth_type'))
. " ($serverName)";
PMA_messagesSet(
'notice',
"Servers/$i/auth_type",
$title,
PMA_lang($sServerAuthCfgMsg, $i) . ' '
. PMA_lang($sSecurityInfoMsg, $i)
);
}
//
// $cfg['Servers'][$i]['AllowRoot']
// $cfg['Servers'][$i]['AllowNoPassword']
// serious security flaw
//
if ($this->cfg->getValue("Servers/$i/AllowRoot")
&& $this->cfg->getValue("Servers/$i/AllowNoPassword")
) {
$title = PMA_lang(PMA_langName('Servers/1/AllowNoPassword'))
. " ($serverName)";
PMA_messagesSet(
'notice',
"Servers/$i/AllowNoPassword",
$title,
__('You allow for connecting to the server without a password.') . ' '
. PMA_lang($sSecurityInfoMsg, $i)
);
}
}
return array($cookieAuthUsed, $blowfishSecret, $blowfishSecretSet);
}
/**
* Set blowfish secret
*
* @param string $blowfishSecret Blowfish secret
* @param boolean $cookieAuthServer Cookie auth is used
* @param boolean $blowfishSecretSet Blowfish secret set
*
* @return array
*/
protected function performConfigChecksServersSetBlowfishSecret(
$blowfishSecret, $cookieAuthServer, $blowfishSecretSet
) {
if ($cookieAuthServer && $blowfishSecret === null) {
$blowfishSecret = uniqid('', true);
$blowfishSecretSet = true;
$this->cfg->set('blowfish_secret', $blowfishSecret);
return array($blowfishSecret, $blowfishSecretSet);
}
return array($blowfishSecret, $blowfishSecretSet);
}
/**
* Define server name
*
* @param string $serverName Server name
* @param int $serverId Server id
*
* @return string Server name
*/
protected function performConfigChecksServersGetServerName(
$serverName, $serverId
) {
if ($serverName == 'localhost') {
$serverName .= " [$serverId]";
return $serverName;
}
return $serverName;
}
/**
* Perform config checks for zip part.
*
* @param string $sGZipDumpWarning Gzip dump warning
* @param string $sBZipDumpWarning Bzip dump warning
* @param string $sZipDumpImportWarn Zip dump import warning
* @param string $sZipDumpExportWarn Zip dump export warning
*
* @return void
*/
protected function performConfigChecksZips(
$sGZipDumpWarning, $sBZipDumpWarning, $sZipDumpImportWarn,
$sZipDumpExportWarn
) {
$this->performConfigChecksServerGZipdump($sGZipDumpWarning);
$this->performConfigChecksServerBZipdump($sBZipDumpWarning);
$this->performConfigChecksServersZipdump(
$sZipDumpImportWarn, $sZipDumpExportWarn
);
}
/**
* Perform config checks for zip part.
*
* @param string $sZipDumpImportWarn Zip dump import warning
* @param string $sZipDumpExportWarn Zip dump export warning
*
* @return void
*/
protected function performConfigChecksServersZipdump(
$sZipDumpImportWarn, $sZipDumpExportWarn
) {
//
// $cfg['ZipDump']
// requires zip_open in import
//
if ($this->cfg->getValue('ZipDump') && !@function_exists('zip_open')) {
PMA_messagesSet(
'error',
'ZipDump_import',
PMA_lang(PMA_langName('ZipDump')),
PMA_lang($sZipDumpImportWarn, 'zip_open')
);
}
//
// $cfg['ZipDump']
// requires gzcompress in export
//
if ($this->cfg->getValue('ZipDump') && !@function_exists('gzcompress')) {
PMA_messagesSet(
'error',
'ZipDump_export',
PMA_lang(PMA_langName('ZipDump')),
PMA_lang($sZipDumpExportWarn, 'gzcompress')
);
}
}
/**
* Check config of servers
*
* @param boolean $cookieAuthUsed Cookie auth is used
* @param boolean $blowfishSecretSet Blowfish secret set
* @param string $sBlowfishSecretMsg Blowfish secret message
* @param string $blowfishSecret Blowfish secret
*
* @return array
*/
protected function performConfigChecksCookieAuthUsed(
$cookieAuthUsed, $blowfishSecretSet, $sBlowfishSecretMsg,
$blowfishSecret
) {
//
// $cfg['blowfish_secret']
// it's required for 'cookie' authentication
//
if ($cookieAuthUsed) {
if ($blowfishSecretSet) {
// 'cookie' auth used, blowfish_secret was generated
PMA_messagesSet(
'notice',
'blowfish_secret_created',
PMA_lang(PMA_langName('blowfish_secret')),
PMA_lang($sBlowfishSecretMsg)
);
} else {
$blowfishWarnings = array();
// check length
if (strlen($blowfishSecret) < 8) {
// too short key
$blowfishWarnings[] = __('Key is too short, it should have at least 8 characters.');
}
// check used characters
$hasDigits = (bool)preg_match('/\d/', $blowfishSecret);
$hasChars = (bool)preg_match('/\S/', $blowfishSecret);
$hasNonword = (bool)preg_match('/\W/', $blowfishSecret);
if (!$hasDigits || !$hasChars || !$hasNonword) {
$blowfishWarnings[] = PMA_lang(__('Key should contain letters, numbers [em]and[/em] special characters.'));
}
if (!empty($blowfishWarnings)) {
PMA_messagesSet(
'error',
'blowfish_warnings' . count($blowfishWarnings),
PMA_lang(PMA_langName('blowfish_secret')),
implode('<br />', $blowfishWarnings)
);
}
}
}
}
/**
* Define all messages
*
* @return array
*/
protected static function defineMessages()
{
$sAllowArbitraryServerWarn = __('This %soption%s should be disabled as it allows attackers to bruteforce login to any MySQL server. If you feel this is necessary, use %strusted proxies list%s. However, IP-based protection may not be reliable if your IP belongs to an ISP where thousands of users, including you, are connected to.');
$sAllowArbitraryServerWarn = sprintf(
$sAllowArbitraryServerWarn,
'[a@?page=form&formset=Features#tab_Security]',
'[/a]', '[a@?page=form&formset=Features#tab_Security]',
'[/a]'
);
$sBlowfishSecretMsg = __('You didn\'t have blowfish secret set and have enabled [kbd]cookie[/kbd] authentication, so a key was automatically generated for you. It is used to encrypt cookies; you don\'t need to remember it.');
$sBZipDumpWarning = __('%sBzip2 compression and decompression%s requires functions (%s) which are unavailable on this system.');
$sBZipDumpWarning = sprintf(
$sBZipDumpWarning,
'[a@?page=form&formset=Features#tab_Import_export]',
'[/a]', '%s'
);
$sDirectoryNotice = __('This value should be double checked to ensure that this directory is neither world accessible nor readable or writable by other users on your server.');
$sForceSSLNotice = __('This %soption%s should be enabled if your web server supports it.');
$sForceSSLNotice = sprintf(
$sForceSSLNotice,
'[a@?page=form&formset=Features#tab_Security]',
'[/a]'
);
$sGZipDumpWarning = __('%sGZip compression and decompression%s requires functions (%s) which are unavailable on this system.');
$sGZipDumpWarning = sprintf(
$sGZipDumpWarning,
'[a@?page=form&formset=Features#tab_Import_export]',
'[/a]',
'%s'
);
$sLoginCookieValidityWarn = __('%sLogin cookie validity%s greater than %ssession.gc_maxlifetime%s may cause random session invalidation (currently session.gc_maxlifetime is %d).');
$sLoginCookieValidityWarn = sprintf(
$sLoginCookieValidityWarn,
'[a@?page=form&formset=Features#tab_Security]',
'[/a]',
'[a@' . PMA_getPHPDocLink(
'session.configuration.php#ini.session.gc-maxlifetime'
) . ']',
'[/a]',
ini_get('session.gc_maxlifetime')
);
$sLoginCookieValidityWarn2 = __('%sLogin cookie validity%s should be set to 1800 seconds (30 minutes) at most. Values larger than 1800 may pose a security risk such as impersonation.');
$sLoginCookieValidityWarn2 = sprintf(
$sLoginCookieValidityWarn2,
'[a@?page=form&formset=Features#tab_Security]',
'[/a]'
);
$sLoginCookieValidityWarn3 = __('If using [kbd]cookie[/kbd] authentication and %sLogin cookie store%s is not 0, %sLogin cookie validity%s must be set to a value less or equal to it.');
$sLoginCookieValidityWarn3 = sprintf(
$sLoginCookieValidityWarn3,
'[a@?page=form&formset=Features#tab_Security]',
'[/a]', '[a@?page=form&formset=Features#tab_Security]',
'[/a]'
);
$sSecurityInfoMsg = __('If you feel this is necessary, use additional protection settings - %shost authentication%s settings and %strusted proxies list%s. However, IP-based protection may not be reliable if your IP belongs to an ISP where thousands of users, including you, are connected to.');
$sSecurityInfoMsg = sprintf(
$sSecurityInfoMsg,
'[a@?page=servers&mode=edit&id=%1$d#tab_Server_config]',
'[/a]',
'[a@?page=form&formset=Features#tab_Security]',
'[/a]'
);
$sServerAuthConfigMsg = __('You set the [kbd]config[/kbd] authentication type and included username and password for auto-login, which is not a desirable option for live hosts. Anyone who knows or guesses your phpMyAdmin URL can directly access your phpMyAdmin panel. Set %sauthentication type%s to [kbd]cookie[/kbd] or [kbd]http[/kbd].');
$sServerAuthConfigMsg = sprintf(
$sServerAuthConfigMsg,
'[a@?page=servers&mode=edit&id=%1$d#tab_Server]',
'[/a]'
);
$sZipDumpExportWarn = __('%sZip compression%s requires functions (%s) which are unavailable on this system.');
$sZipDumpExportWarn = sprintf(
$sZipDumpExportWarn,
'[a@?page=form&formset=Features#tab_Import_export]',
'[/a]',
'%s'
);
$sZipDumpImportWarn = __('%sZip decompression%s requires functions (%s) which are unavailable on this system.');
$sZipDumpImportWarn = sprintf(
$sZipDumpImportWarn,
'[a@?page=form&formset=Features#tab_Import_export]',
'[/a]',
'%s'
);
return array(
$sAllowArbitraryServerWarn, $sBlowfishSecretMsg, $sBZipDumpWarning,
$sDirectoryNotice, $sForceSSLNotice, $sGZipDumpWarning,
$sLoginCookieValidityWarn, $sLoginCookieValidityWarn2,
$sLoginCookieValidityWarn3, $sSecurityInfoMsg, $sServerAuthConfigMsg,
$sZipDumpExportWarn, $sZipDumpImportWarn
);
}
/**
* Check configuration for login cookie
*
* @param string $sLoginCookieValidityWarn Warning 1 for login cookie validity
* @param string $sLoginCookieValidityWarn2 Warning 2 for login cookie validity
* @param string $sLoginCookieValidityWarn3 Warning 3 for login cookie validity
*
* @return void
*/
protected function performConfigChecksLoginCookie(
$sLoginCookieValidityWarn, $sLoginCookieValidityWarn2,
$sLoginCookieValidityWarn3
) {
//
// $cfg['LoginCookieValidity']
// value greater than session.gc_maxlifetime will cause
// random session invalidation after that time
$loginCookieValidity = $this->cfg->getValue('LoginCookieValidity');
if ($loginCookieValidity > ini_get('session.gc_maxlifetime')
) {
PMA_messagesSet(
'error',
'LoginCookieValidity',
PMA_lang(PMA_langName('LoginCookieValidity')),
PMA_lang($sLoginCookieValidityWarn)
);
}
//
// $cfg['LoginCookieValidity']
// should be at most 1800 (30 min)
//
if ($loginCookieValidity > 1800) {
PMA_messagesSet(
'notice',
'LoginCookieValidity',
PMA_lang(PMA_langName('LoginCookieValidity')),
PMA_lang($sLoginCookieValidityWarn2)
);
}
//
// $cfg['LoginCookieValidity']
// $cfg['LoginCookieStore']
// LoginCookieValidity must be less or equal to LoginCookieStore
//
if (($this->cfg->getValue('LoginCookieStore') != 0)
&& ($loginCookieValidity > $this->cfg->getValue('LoginCookieStore'))
) {
PMA_messagesSet(
'error',
'LoginCookieValidity',
PMA_lang(PMA_langName('LoginCookieValidity')),
PMA_lang($sLoginCookieValidityWarn3)
);
}
}
/**
* Check GZipDump configuration
*
* @param string $sBZipDumpWarn Warning for BZipDumpWarning
*
* @return void
*/
protected function performConfigChecksServerBZipdump($sBZipDumpWarn)
{
//
// $cfg['BZipDump']
// requires bzip2 functions
//
if ($this->cfg->getValue('BZipDump')
&& (!@function_exists('bzopen') || !@function_exists('bzcompress'))
) {
$functions = @function_exists('bzopen')
? '' :
'bzopen';
$functions .= @function_exists('bzcompress')
? ''
: ($functions ? ', ' : '') . 'bzcompress';
PMA_messagesSet(
'error',
'BZipDump',
PMA_lang(PMA_langName('BZipDump')),
PMA_lang($sBZipDumpWarn, $functions)
);
}
}
/**
* Check GZipDump configuration
*
* @param string $sGZipDumpWarn Warning for GZipDumpWarning
*
* @return void
*/
protected function performConfigChecksServerGZipdump($sGZipDumpWarn)
{
//
// $cfg['GZipDump']
// requires zlib functions
//
if ($this->cfg->getValue('GZipDump')
&& (@!function_exists('gzopen') || @!function_exists('gzencode'))
) {
PMA_messagesSet(
'error',
'GZipDump',
PMA_lang(PMA_langName('GZipDump')),
PMA_lang($sGZipDumpWarn, 'gzencode')
);
}
}
}
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