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Sieve.php
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Sieve.php
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<?php
/**
* This file contains the Net_Sieve class.
*
* PHP version 5
*
* +-----------------------------------------------------------------------+
* | All rights reserved. |
* | |
* | Redistribution and use in source and binary forms, with or without |
* | modification, are permitted provided that the following conditions |
* | are met: |
* | |
* | o Redistributions of source code must retain the above copyright |
* | notice, this list of conditions and the following disclaimer. |
* | o Redistributions in binary form must reproduce the above copyright |
* | notice, this list of conditions and the following disclaimer in the |
* | documentation and/or other materials provided with the distribution.|
* | |
* | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
* | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
* | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
* | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
* | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
* | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
* | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
* | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
* +-----------------------------------------------------------------------+
*
* @category Networking
* @package Net_Sieve
* @author Richard Heyes <[email protected]>
* @author Damian Fernandez Sosa <[email protected]>
* @author Anish Mistry <[email protected]>
* @author Jan Schneider <[email protected]>
* @copyright 2002-2003 Richard Heyes
* @copyright 2006-2008 Anish Mistry
* @license http://www.opensource.org/licenses/bsd-license.php BSD
* @link http://pear.php.net/package/Net_Sieve
*/
require_once 'PEAR.php';
require_once 'Net/Socket.php';
/**
* TODO
*
* o supportsAuthMech()
*/
/**
* Disconnected state
* @const NET_SIEVE_STATE_DISCONNECTED
*/
define('NET_SIEVE_STATE_DISCONNECTED', 1, true);
/**
* Authorisation state
* @const NET_SIEVE_STATE_AUTHORISATION
*/
define('NET_SIEVE_STATE_AUTHORISATION', 2, true);
/**
* Transaction state
* @const NET_SIEVE_STATE_TRANSACTION
*/
define('NET_SIEVE_STATE_TRANSACTION', 3, true);
/**
* A class for talking to the timsieved server which comes with Cyrus IMAP.
*
* @category Networking
* @package Net_Sieve
* @author Richard Heyes <[email protected]>
* @author Damian Fernandez Sosa <[email protected]>
* @author Anish Mistry <[email protected]>
* @author Jan Schneider <[email protected]>
* @copyright 2002-2003 Richard Heyes
* @copyright 2006-2008 Anish Mistry
* @license http://www.opensource.org/licenses/bsd-license.php BSD
* @version Release: @package_version@
* @link http://pear.php.net/package/Net_Sieve
* @link http://tools.ietf.org/html/rfc5228 RFC 5228 (Sieve: An Email
* Filtering Language)
* @link http://tools.ietf.org/html/rfc5804 RFC 5804 A Protocol for
* Remotely Managing Sieve Scripts
*/
class Net_Sieve
{
/**
* The authentication methods this class supports.
*
* Can be overwritten if having problems with certain methods.
*
* @var array
*/
var $supportedAuthMethods = array(
'DIGEST-MD5',
'CRAM-MD5',
'EXTERNAL',
'PLAIN' ,
'LOGIN'
);
/**
* SASL authentication methods that require Auth_SASL.
*
* @var array
*/
var $supportedSASLAuthMethods = array('DIGEST-MD5', 'CRAM-MD5');
/**
* The socket handle.
*
* @var resource
*/
var $_sock;
/**
* Parameters and connection information.
*
* @var array
*/
var $_data;
/**
* Current state of the connection.
*
* One of the NET_SIEVE_STATE_* constants.
*
* @var integer
*/
var $_state;
/**
* PEAR object to avoid strict warnings.
*
* @var PEAR_Error
*/
var $_pear;
/**
* Constructor error.
*
* @var PEAR_Error
*/
var $_error;
/**
* Whether to enable debugging.
*
* @var boolean
*/
var $_debug = false;
/**
* Debug output handler.
*
* This has to be a valid callback.
*
* @var string|array
*/
var $_debug_handler = null;
/**
* Whether to pick up an already established connection.
*
* @var boolean
*/
var $_bypassAuth = false;
/**
* Whether to use TLS if available.
*
* @var boolean
*/
var $_useTLS = true;
/**
* Additional options for stream_context_create().
*
* @var array
*/
var $_options = null;
/**
* Maximum number of referral loops
*
* @var array
*/
var $_maxReferralCount = 15;
/**
* Constructor.
*
* Sets up the object, connects to the server and logs in. Stores any
* generated error in $this->_error, which can be retrieved using the
* getError() method.
*
* @param string $user Login username.
* @param string $pass Login password.
* @param string $host Hostname of server.
* @param string $port Port of server.
* @param string $logintype Type of login to perform (see
* $supportedAuthMethods).
* @param string $euser Effective user. If authenticating as an
* administrator, login as this user.
* @param boolean $debug Whether to enable debugging (@see setDebug()).
* @param string $bypassAuth Skip the authentication phase. Useful if the
* socket is already open.
* @param boolean $useTLS Use TLS if available.
* @param array $options Additional options for
* stream_context_create().
* @param mixed $handler A callback handler for the debug output.
*/
function __construct($user = null, $pass = null, $host = 'localhost',
$port = 2000, $logintype = '', $euser = '',
$debug = false, $bypassAuth = false, $useTLS = true,
$options = null, $handler = null
) {
$this->_pear = new PEAR();
$this->_state = NET_SIEVE_STATE_DISCONNECTED;
$this->_data['user'] = $user;
$this->_data['pass'] = $pass;
$this->_data['host'] = $host;
$this->_data['port'] = $port;
$this->_data['logintype'] = $logintype;
$this->_data['euser'] = $euser;
$this->_sock = new Net_Socket();
$this->_bypassAuth = $bypassAuth;
$this->_useTLS = $useTLS;
$this->_options = (array) $options;
$this->setDebug($debug, $handler);
/* Try to include the Auth_SASL package. If the package is not
* available, we disable the authentication methods that depend upon
* it. */
if ((@include_once 'Auth/SASL.php') === false) {
$this->_debug('Auth_SASL not present');
$this->supportedAuthMethods = array_diff(
$this->supportedAuthMethods,
$this->supportedSASLAuthMethods
);
}
if (strlen($user) && strlen($pass)) {
$this->_error = $this->_handleConnectAndLogin();
}
}
/**
* Returns any error that may have been generated in the constructor.
*
* @return boolean|PEAR_Error False if no error, PEAR_Error otherwise.
*/
function getError()
{
return is_a($this->_error, 'PEAR_Error') ? $this->_error : false;
}
/**
* Sets the debug state and handler function.
*
* @param boolean $debug Whether to enable debugging.
* @param string $handler A custom debug handler. Must be a valid callback.
*
* @return void
*/
function setDebug($debug = true, $handler = null)
{
$this->_debug = $debug;
$this->_debug_handler = $handler;
}
/**
* Connects to the server and logs in.
*
* @return boolean True on success, PEAR_Error on failure.
*/
function _handleConnectAndLogin()
{
$res = $this->connect($this->_data['host'], $this->_data['port'], $this->_options, $this->_useTLS);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
if ($this->_bypassAuth === false) {
$res = $this->login($this->_data['user'], $this->_data['pass'], $this->_data['logintype'], $this->_data['euser'], $this->_bypassAuth);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
}
return true;
}
/**
* Handles connecting to the server and checks the response validity.
*
* @param string $host Hostname of server.
* @param string $port Port of server.
* @param array $options List of options to pass to
* stream_context_create().
* @param boolean $useTLS Use TLS if available.
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function connect($host, $port, $options = null, $useTLS = true)
{
$this->_data['host'] = $host;
$this->_data['port'] = $port;
$this->_useTLS = $useTLS;
if (is_array($options)) {
$this->_options = array_merge($this->_options, $options);
}
if (NET_SIEVE_STATE_DISCONNECTED != $this->_state) {
return $this->_pear->raiseError('Not currently in DISCONNECTED state', 1);
}
$res = $this->_sock->connect($host, $port, false, 5, $options);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
if ($this->_bypassAuth) {
$this->_state = NET_SIEVE_STATE_TRANSACTION;
} else {
$this->_state = NET_SIEVE_STATE_AUTHORISATION;
$res = $this->_doCmd();
if (is_a($res, 'PEAR_Error')) {
return $res;
}
}
// Explicitly ask for the capabilities in case the connection is
// picked up from an existing connection.
$res = $this->_cmdCapability();
if (is_a($res, 'PEAR_Error')) {
return $this->_pear->raiseError(
'Failed to connect, server said: ' . $res->getMessage(), 2
);
}
// Check if we can enable TLS via STARTTLS.
if ($useTLS && !empty($this->_capability['starttls'])
&& function_exists('stream_socket_enable_crypto')
) {
$res = $this->_startTLS();
if (is_a($res, 'PEAR_Error')) {
return $res;
}
}
return true;
}
/**
* Disconnect from the Sieve server.
*
* @param boolean $sendLogoutCMD Whether to send LOGOUT command before
* disconnecting.
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function disconnect($sendLogoutCMD = true)
{
return $this->_cmdLogout($sendLogoutCMD);
}
/**
* Logs into server.
*
* @param string $user Login username.
* @param string $pass Login password.
* @param string $logintype Type of login method to use.
* @param string $euser Effective UID (perform on behalf of $euser).
* @param boolean $bypassAuth Do not perform authentication.
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function login($user, $pass, $logintype = null, $euser = '', $bypassAuth = false)
{
$this->_data['user'] = $user;
$this->_data['pass'] = $pass;
$this->_data['logintype'] = $logintype;
$this->_data['euser'] = $euser;
$this->_bypassAuth = $bypassAuth;
if (NET_SIEVE_STATE_AUTHORISATION != $this->_state) {
return $this->_pear->raiseError('Not currently in AUTHORISATION state', 1);
}
if (!$bypassAuth ) {
$res = $this->_cmdAuthenticate($user, $pass, $logintype, $euser);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
}
$this->_state = NET_SIEVE_STATE_TRANSACTION;
return true;
}
/**
* Returns an indexed array of scripts currently on the server.
*
* @return array Indexed array of scriptnames.
*/
function listScripts()
{
if (is_array($scripts = $this->_cmdListScripts())) {
return $scripts[0];
} else {
return $scripts;
}
}
/**
* Returns the active script.
*
* @return string The active scriptname.
*/
function getActive()
{
if (is_array($scripts = $this->_cmdListScripts())) {
return $scripts[1];
}
}
/**
* Sets the active script.
*
* @param string $scriptname The name of the script to be set as active.
*
* @return boolean True on success, PEAR_Error on failure.
*/
function setActive($scriptname)
{
return $this->_cmdSetActive($scriptname);
}
/**
* Retrieves a script.
*
* @param string $scriptname The name of the script to be retrieved.
*
* @return string The script on success, PEAR_Error on failure.
*/
function getScript($scriptname)
{
return $this->_cmdGetScript($scriptname);
}
/**
* Adds a script to the server.
*
* @param string $scriptname Name of the script.
* @param string $script The script content.
* @param boolean $makeactive Whether to make this the active script.
*
* @return boolean True on success, PEAR_Error on failure.
*/
function installScript($scriptname, $script, $makeactive = false)
{
$res = $this->_cmdPutScript($scriptname, $script);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
if ($makeactive) {
return $this->_cmdSetActive($scriptname);
}
return true;
}
/**
* Removes a script from the server.
*
* @param string $scriptname Name of the script.
*
* @return boolean True on success, PEAR_Error on failure.
*/
function removeScript($scriptname)
{
return $this->_cmdDeleteScript($scriptname);
}
/**
* Checks if the server has space to store the script by the server.
*
* @param string $scriptname The name of the script to mark as active.
* @param integer $size The size of the script.
*
* @return boolean|PEAR_Error True if there is space, PEAR_Error otherwise.
*
* @todo Rename to hasSpace()
*/
function haveSpace($scriptname, $size)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
return $this->_pear->raiseError('Not currently in TRANSACTION state', 1);
}
$res = $this->_doCmd(sprintf('HAVESPACE %s %d', $this->_escape($scriptname), $size));
if (is_a($res, 'PEAR_Error')) {
return $res;
}
return true;
}
/**
* Returns the list of extensions the server supports.
*
* @return array List of extensions or PEAR_Error on failure.
*/
function getExtensions()
{
if (NET_SIEVE_STATE_DISCONNECTED == $this->_state) {
return $this->_pear->raiseError('Not currently connected', 7);
}
return $this->_capability['extensions'];
}
/**
* Returns whether the server supports an extension.
*
* @param string $extension The extension to check.
*
* @return boolean Whether the extension is supported or PEAR_Error on
* failure.
*/
function hasExtension($extension)
{
if (NET_SIEVE_STATE_DISCONNECTED == $this->_state) {
return $this->_pear->raiseError('Not currently connected', 7);
}
$extension = trim($this->_toUpper($extension));
if (is_array($this->_capability['extensions'])) {
foreach ($this->_capability['extensions'] as $ext) {
if ($ext == $extension) {
return true;
}
}
}
return false;
}
/**
* Returns the list of authentication methods the server supports.
*
* @return array List of authentication methods or PEAR_Error on failure.
*/
function getAuthMechs()
{
if (NET_SIEVE_STATE_DISCONNECTED == $this->_state) {
return $this->_pear->raiseError('Not currently connected', 7);
}
return $this->_capability['sasl'];
}
/**
* Returns whether the server supports an authentication method.
*
* @param string $method The method to check.
*
* @return boolean Whether the method is supported or PEAR_Error on
* failure.
*/
function hasAuthMech($method)
{
if (NET_SIEVE_STATE_DISCONNECTED == $this->_state) {
return $this->_pear->raiseError('Not currently connected', 7);
}
$method = trim($this->_toUpper($method));
if (is_array($this->_capability['sasl'])) {
foreach ($this->_capability['sasl'] as $sasl) {
if ($sasl == $method) {
return true;
}
}
}
return false;
}
/**
* Handles the authentication using any known method.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $userMethod The method to use. If empty, the class chooses
* the best (strongest) available method.
* @param string $euser The effective uid to authenticate as.
*
* @return void
*/
function _cmdAuthenticate($uid, $pwd, $userMethod = null, $euser = '')
{
$method = $this->_getBestAuthMethod($userMethod);
if (is_a($method, 'PEAR_Error')) {
return $method;
}
switch ($method) {
case 'DIGEST-MD5':
return $this->_authDigestMD5($uid, $pwd, $euser);
case 'CRAM-MD5':
$result = $this->_authCRAMMD5($uid, $pwd, $euser);
break;
case 'LOGIN':
$result = $this->_authLOGIN($uid, $pwd, $euser);
break;
case 'PLAIN':
$result = $this->_authPLAIN($uid, $pwd, $euser);
break;
case 'EXTERNAL':
$result = $this->_authEXTERNAL($uid, $pwd, $euser);
break;
default :
$result = $this->_pear->raiseError(
$method . ' is not a supported authentication method'
);
break;
}
$res = $this->_doCmd();
if (is_a($res, 'PEAR_Error')) {
return $res;
}
// Query the server capabilities again now that we are authenticated.
if ($this->_pear->isError($res = $this->_cmdCapability())) {
return $this->_pear->raiseError(
'Failed to connect, server said: ' . $res->getMessage(), 2
);
}
return $result;
}
/**
* Authenticates the user using the PLAIN method.
*
* @param string $user The userid to authenticate as.
* @param string $pass The password to authenticate with.
* @param string $euser The effective uid to authenticate as.
*
* @return void
*/
function _authPLAIN($user, $pass, $euser)
{
return $this->_sendCmd(
sprintf(
'AUTHENTICATE "PLAIN" "%s"',
base64_encode($euser . chr(0) . $user . chr(0) . $pass)
)
);
}
/**
* Authenticates the user using the LOGIN method.
*
* @param string $user The userid to authenticate as.
* @param string $pass The password to authenticate with.
* @param string $euser The effective uid to authenticate as. Not used.
*
* @return void
*/
function _authLOGIN($user, $pass, $euser)
{
$result = $this->_sendCmd('AUTHENTICATE "LOGIN"');
if (is_a($result, 'PEAR_Error')) {
return $result;
}
$result = $this->_doCmd('"' . base64_encode($user) . '"', true);
if (is_a($result, 'PEAR_Error')) {
return $result;
}
return $this->_doCmd('"' . base64_encode($pass) . '"', true);
}
/**
* Authenticates the user using the CRAM-MD5 method.
*
* @param string $user The userid to authenticate as.
* @param string $pass The password to authenticate with.
* @param string $euser The effective uid to authenticate as. Not used.
*
* @return void
*/
function _authCRAMMD5($user, $pass, $euser)
{
$challenge = $this->_doCmd('AUTHENTICATE "CRAM-MD5"', true);
if (is_a($challenge, 'PEAR_Error')) {
return $challenge;
}
$auth_sasl = new Auth_SASL;
$cram = $auth_sasl->factory('crammd5');
$challenge = base64_decode(trim($challenge));
$response = $cram->getResponse($user, $pass, $challenge);
if (is_a($response, 'PEAR_Error')) {
return $response;
}
return $this->_sendStringResponse(base64_encode($response));
}
/**
* Authenticates the user using the DIGEST-MD5 method.
*
* @param string $user The userid to authenticate as.
* @param string $pass The password to authenticate with.
* @param string $euser The effective uid to authenticate as.
*
* @return void
*/
function _authDigestMD5($user, $pass, $euser)
{
$challenge = $this->_doCmd('AUTHENTICATE "DIGEST-MD5"', true);
if (is_a($challenge, 'PEAR_Error')) {
return $challenge;
}
$auth_sasl = new Auth_SASL;
$digest = $auth_sasl->factory('digestmd5');
$challenge = base64_decode(trim($challenge));
// @todo Really 'localhost'?
$response = $digest->getResponse($user, $pass, $challenge, 'localhost', 'sieve', $euser);
if (is_a($response, 'PEAR_Error')) {
return $response;
}
$result = $this->_sendStringResponse(base64_encode($response));
if (is_a($result, 'PEAR_Error')) {
return $result;
}
$result = $this->_doCmd('', true);
if (is_a($result, 'PEAR_Error')) {
return $result;
}
if ($this->_toUpper(substr($result, 0, 2)) == 'OK') {
return;
}
/* We don't use the protocol's third step because SIEVE doesn't allow
* subsequent authentication, so we just silently ignore it. */
$result = $this->_sendStringResponse('');
if (is_a($result, 'PEAR_Error')) {
return $result;
}
return $this->_doCmd();
}
/**
* Authenticates the user using the EXTERNAL method.
*
* @param string $user The userid to authenticate as.
* @param string $pass The password to authenticate with.
* @param string $euser The effective uid to authenticate as.
*
* @return void
*
* @since 1.1.7
*/
function _authEXTERNAL($user, $pass, $euser)
{
$cmd = sprintf(
'AUTHENTICATE "EXTERNAL" "%s"',
base64_encode(strlen($euser) ? $euser : $user)
);
return $this->_sendCmd($cmd);
}
/**
* Removes a script from the server.
*
* @param string $scriptname Name of the script to delete.
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function _cmdDeleteScript($scriptname)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
return $this->_pear->raiseError('Not currently in AUTHORISATION state', 1);
}
$res = $this->_doCmd(sprintf('DELETESCRIPT %s', $this->_escape($scriptname)));
if (is_a($res, 'PEAR_Error')) {
return $res;
}
return true;
}
/**
* Retrieves the contents of the named script.
*
* @param string $scriptname Name of the script to retrieve.
*
* @return string The script if successful, PEAR_Error otherwise.
*/
function _cmdGetScript($scriptname)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
return $this->_pear->raiseError('Not currently in AUTHORISATION state', 1);
}
$res = $this->_doCmd(sprintf('GETSCRIPT %s', $this->_escape($scriptname)));
if (is_a($res, 'PEAR_Error')) {
return $res;
}
return preg_replace('/^{[0-9]+}\r\n/', '', $res);
}
/**
* Sets the active script, i.e. the one that gets run on new mail by the
* server.
*
* @param string $scriptname The name of the script to mark as active.
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function _cmdSetActive($scriptname)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
return $this->_pear->raiseError('Not currently in AUTHORISATION state', 1);
}
$res = $this->_doCmd(sprintf('SETACTIVE %s', $this->_escape($scriptname)));
if (is_a($res, 'PEAR_Error')) {
return $res;
}
return true;
}
/**
* Returns the list of scripts on the server.
*
* @return array An array with the list of scripts in the first element
* and the active script in the second element on success,
* PEAR_Error otherwise.
*/
function _cmdListScripts()
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
return $this->_pear->raiseError('Not currently in AUTHORISATION state', 1);
}
$res = $this->_doCmd('LISTSCRIPTS');
if (is_a($res, 'PEAR_Error')) {
return $res;
}
$scripts = array();
$activescript = null;
$res = explode("\r\n", $res);
foreach ($res as $value) {
if (preg_match('/^"(.*)"( ACTIVE)?$/i', $value, $matches)) {
$script_name = stripslashes($matches[1]);
$scripts[] = $script_name;
if (!empty($matches[2])) {
$activescript = $script_name;
}
}
}
return array($scripts, $activescript);
}
/**
* Adds a script to the server.
*
* @param string $scriptname Name of the new script.
* @param string $scriptdata The new script.
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function _cmdPutScript($scriptname, $scriptdata)
{
if (NET_SIEVE_STATE_TRANSACTION != $this->_state) {
return $this->_pear->raiseError('Not currently in AUTHORISATION state', 1);
}
$stringLength = $this->_getLineLength($scriptdata);
$command = sprintf(
"PUTSCRIPT %s {%d+}\r\n%s",
$this->_escape($scriptname),
$stringLength,
$scriptdata
);
$res = $this->_doCmd($command);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
return true;
}
/**
* Logs out of the server and terminates the connection.
*
* @param boolean $sendLogoutCMD Whether to send LOGOUT command before
* disconnecting.
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function _cmdLogout($sendLogoutCMD = true)
{
if (NET_SIEVE_STATE_DISCONNECTED == $this->_state) {
return $this->_pear->raiseError('Not currently connected', 1);
}
if ($sendLogoutCMD) {
$res = $this->_doCmd('LOGOUT');
if (is_a($res, 'PEAR_Error')) {
return $res;
}
}
$this->_sock->disconnect();
$this->_state = NET_SIEVE_STATE_DISCONNECTED;
return true;
}
/**
* Sends the CAPABILITY command
*
* @return boolean True on success, PEAR_Error otherwise.
*/
function _cmdCapability()
{
if (NET_SIEVE_STATE_DISCONNECTED == $this->_state) {
return $this->_pear->raiseError('Not currently connected', 1);
}
$res = $this->_doCmd('CAPABILITY');
if (is_a($res, 'PEAR_Error')) {
return $res;
}
$this->_parseCapability($res);
return true;
}
/**
* Parses the response from the CAPABILITY command and stores the result
* in $_capability.
*
* @param string $data The response from the capability command.
*
* @return void
*/
function _parseCapability($data)
{
// Clear the cached capabilities.
$this->_capability = array('sasl' => array(),
'extensions' => array());
$data = preg_split('/\r?\n/', $this->_toUpper($data), -1, PREG_SPLIT_NO_EMPTY);
for ($i = 0; $i < count($data); $i++) {
if (!preg_match('/^"([A-Z]+)"( "(.*)")?$/', $data[$i], $matches)) {
continue;
}
switch ($matches[1]) {
case 'IMPLEMENTATION':
$this->_capability['implementation'] = $matches[3];
break;
case 'SASL':
$this->_capability['sasl'] = preg_split('/\s+/', $matches[3]);
break;
case 'SIEVE':
$this->_capability['extensions'] = preg_split('/\s+/', $matches[3]);
break;
case 'STARTTLS':
$this->_capability['starttls'] = true;
break;
}
}
}
/**
* Sends a command to the server
*
* @param string $cmd The command to send.
*
* @return void
*/