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<?php
/** vim: set expandtab softtabstop=4 tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP Version 5 and 7 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2021 Jon Parise and Chuck Hagenbuch |
// | All rights reserved. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | 1. Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | 2. 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 HOLDER 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. |
// +----------------------------------------------------------------------+
// | Authors: Chuck Hagenbuch <chuck@horde.org> |
// | Jon Parise <jon@php.net> |
// | Damian Alejandro Fernandez Sosa <damlists@cnba.uba.ar> |
// +----------------------------------------------------------------------+
require_once 'PEAR.php';
require_once 'Net/Socket.php';
/**
* Provides an implementation of the SMTP protocol using PEAR's
* Net_Socket class.
*
* @package Net_SMTP
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Jon Parise <jon@php.net>
* @author Damian Alejandro Fernandez Sosa <damlists@cnba.uba.ar>
* @license http://opensource.org/licenses/bsd-license.php BSD-2-Clause
*
* @example basic.php A basic implementation of the Net_SMTP package.
*/
class Net_SMTP
{
/**
* The server to connect to.
* @var string
*/
public $host = 'localhost';
/**
* The port to connect to.
* @var int
*/
public $port = 25;
/**
* The value to give when sending EHLO or HELO.
* @var string
*/
public $localhost = 'localhost';
/**
* List of supported authentication methods, in preferential order.
* @var array
*/
public $auth_methods = array();
/**
* Use SMTP command pipelining (specified in RFC 2920) if the SMTP
* server supports it.
*
* When pipeling is enabled, rcptTo(), mailFrom(), sendFrom(),
* somlFrom() and samlFrom() do not wait for a response from the
* SMTP server but return immediately.
*
* @var bool
*/
public $pipelining = false;
/**
* Number of pipelined commands.
* @var int
*/
protected $pipelined_commands = 0;
/**
* Should debugging output be enabled?
* @var boolean
*/
protected $debug = false;
/**
* Debug output handler.
* @var callback
*/
protected $debug_handler = null;
/**
* The socket resource being used to connect to the SMTP server.
* @var resource
*/
protected $socket = null;
/**
* Array of socket options that will be passed to Net_Socket::connect().
* @see stream_context_create()
* @var array
*/
protected $socket_options = null;
/**
* The socket I/O timeout value in seconds.
* @var int
*/
protected $timeout = 0;
/**
* The most recent server response code.
* @var int
*/
protected $code = -1;
/**
* The most recent server response arguments.
* @var array
*/
protected $arguments = array();
/**
* Stores the SMTP server's greeting string.
* @var string
*/
protected $greeting = null;
/**
* Stores detected features of the SMTP server.
* @var array
*/
protected $esmtp = array();
/**
* Instantiates a new Net_SMTP object, overriding any defaults
* with parameters that are passed in.
*
* If you have SSL support in PHP, you can connect to a server
* over SSL using an 'ssl://' prefix:
*
* // 465 is a common smtps port.
* $smtp = new Net_SMTP('ssl://mail.host.com', 465);
* $smtp->connect();
*
* @param string $host The server to connect to.
* @param integer $port The port to connect to.
* @param string $localhost The value to give when sending EHLO or HELO.
* @param boolean $pipelining Use SMTP command pipelining
* @param integer $timeout Socket I/O timeout in seconds.
* @param array $socket_options Socket stream_context_create() options.
* @param string $gssapi_principal GSSAPI service principal name
* @param string $gssapi_cname GSSAPI credentials cache
*
* @since 1.0
*/
public function __construct($host = null, $port = null, $localhost = null,
$pipelining = false, $timeout = 0, $socket_options = null,
$gssapi_principal=null, $gssapi_cname=null
) {
if (isset($host)) {
$this->host = $host;
}
if (isset($port)) {
$this->port = $port;
}
if (isset($localhost)) {
$this->localhost = $localhost;
}
$this->pipelining = $pipelining;
$this->socket = new Net_Socket();
$this->socket_options = $socket_options;
$this->timeout = $timeout;
$this->gssapi_principal = $gssapi_principal;
$this->gssapi_cname = $gssapi_cname;
/* If PHP krb5 extension is loaded, we enable GSSAPI method. */
if (extension_loaded('krb5')) {
$this->setAuthMethod('GSSAPI', array($this, 'authGSSAPI'));
}
/* Include the Auth_SASL package. If the package is available, we
* enable the authentication methods that depend upon it. */
if (@include_once 'Auth/SASL.php') {
$this->setAuthMethod('CRAM-MD5', array($this, 'authCramMD5'));
$this->setAuthMethod('DIGEST-MD5', array($this, 'authDigestMD5'));
}
/* These standard authentication methods are always available. */
$this->setAuthMethod('LOGIN', array($this, 'authLogin'), false);
$this->setAuthMethod('PLAIN', array($this, 'authPlain'), false);
$this->setAuthMethod('XOAUTH2', array($this, 'authXOAuth2'), false);
}
/**
* Set the socket I/O timeout value in seconds plus microseconds.
*
* @param integer $seconds Timeout value in seconds.
* @param integer $microseconds Additional value in microseconds.
*
* @since 1.5.0
*/
public function setTimeout($seconds, $microseconds = 0)
{
return $this->socket->setTimeout($seconds, $microseconds);
}
/**
* Set the value of the debugging flag.
*
* @param boolean $debug New value for the debugging flag.
* @param callback $handler Debug handler callback
*
* @since 1.1.0
*/
public function setDebug($debug, $handler = null)
{
$this->debug = $debug;
$this->debug_handler = $handler;
}
/**
* Write the given debug text to the current debug output handler.
*
* @param string $message Debug mesage text.
*
* @since 1.3.3
*/
protected function debug($message)
{
if ($this->debug) {
if ($this->debug_handler) {
call_user_func_array(
$this->debug_handler, array(&$this, $message)
);
} else {
echo "DEBUG: $message\n";
}
}
}
/**
* Send the given string of data to the server.
*
* @param string $data The string of data to send.
*
* @return mixed The number of bytes that were actually written,
* or a PEAR_Error object on failure.
*
* @since 1.1.0
*/
protected function send($data)
{
$this->debug("Send: $data");
$result = $this->socket->write($data);
if (!$result || PEAR::isError($result)) {
$msg = $result ? $result->getMessage() : "unknown error";
return PEAR::raiseError("Failed to write to socket: $msg");
}
return $result;
}
/**
* Send a command to the server with an optional string of
* arguments. A carriage return / linefeed (CRLF) sequence will
* be appended to each command string before it is sent to the
* SMTP server - an error will be thrown if the command string
* already contains any newline characters. Use send() for
* commands that must contain newlines.
*
* @param string $command The SMTP command to send to the server.
* @param string $args A string of optional arguments to append
* to the command.
*
* @return mixed The result of the send() call.
*
* @since 1.1.0
*/
protected function put($command, $args = '')
{
if (!empty($args)) {
$command .= ' ' . $args;
}
if (strcspn($command, "\r\n") !== strlen($command)) {
return PEAR::raiseError('Commands cannot contain newlines');
}
return $this->send($command . "\r\n");
}
/**
* Read a reply from the SMTP server. The reply consists of a response
* code and a response message.
*
* @param mixed $valid The set of valid response codes. These
* may be specified as an array of integer
* values or as a single integer value.
* @param bool $later Do not parse the response now, but wait
* until the last command in the pipelined
* command group
*
* @return mixed True if the server returned a valid response code or
* a PEAR_Error object is an error condition is reached.
*
* @since 1.1.0
*
* @see getResponse
*/
protected function parseResponse($valid, $later = false)
{
$this->code = -1;
$this->arguments = array();
if ($later) {
$this->pipelined_commands++;
return true;
}
for ($i = 0; $i <= $this->pipelined_commands; $i++) {
while ($line = $this->socket->readLine()) {
$this->debug("Recv: $line");
/* If we receive an empty line, the connection was closed. */
if (empty($line)) {
$this->disconnect();
return PEAR::raiseError('Connection was closed');
}
/* Read the code and store the rest in the arguments array. */
$code = substr($line, 0, 3);
$this->arguments[] = trim(substr($line, 4));
/* Check the syntax of the response code. */
if (is_numeric($code)) {
$this->code = (int)$code;
} else {
$this->code = -1;
break;
}
/* If this is not a multiline response, we're done. */
if (substr($line, 3, 1) != '-') {
break;
}
}
}
$this->pipelined_commands = 0;
/* Compare the server's response code with the valid code/codes. */
if (is_int($valid) && ($this->code === $valid)) {
return true;
} elseif (is_array($valid) && in_array($this->code, $valid, true)) {
return true;
}
return PEAR::raiseError('Invalid response code received from server', $this->code);
}
/**
* Issue an SMTP command and verify its response.
*
* @param string $command The SMTP command string or data.
* @param mixed $valid The set of valid response codes. These
* may be specified as an array of integer
* values or as a single integer value.
*
* @return mixed True on success or a PEAR_Error object on failure.
*
* @since 1.6.0
*/
public function command($command, $valid)
{
if (PEAR::isError($error = $this->put($command))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse($valid))) {
return $error;
}
return true;
}
/**
* Return a 2-tuple containing the last response from the SMTP server.
*
* @return array A two-element array: the first element contains the
* response code as an integer and the second element
* contains the response's arguments as a string.
*
* @since 1.1.0
*/
public function getResponse()
{
return array($this->code, join("\n", $this->arguments));
}
/**
* Return the SMTP server's greeting string.
*
* @return string A string containing the greeting string, or null if
* a greeting has not been received.
*
* @since 1.3.3
*/
public function getGreeting()
{
return $this->greeting;
}
/**
* Attempt to connect to the SMTP server.
*
* @param int $timeout The timeout value (in seconds) for the
* socket connection attempt.
* @param bool $persistent Should a persistent socket connection
* be used?
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function connect($timeout = null, $persistent = false)
{
$this->greeting = null;
$result = $this->socket->connect(
$this->host, $this->port, $persistent, $timeout, $this->socket_options
);
if (PEAR::isError($result)) {
return PEAR::raiseError(
'Failed to connect socket: ' . $result->getMessage()
);
}
/*
* Now that we're connected, reset the socket's timeout value for
* future I/O operations. This allows us to have different socket
* timeout values for the initial connection (our $timeout parameter)
* and all other socket operations.
*/
if ($this->timeout > 0) {
if (PEAR::isError($error = $this->setTimeout($this->timeout))) {
return $error;
}
}
if (PEAR::isError($error = $this->parseResponse(220))) {
return $error;
}
/* Extract and store a copy of the server's greeting string. */
list(, $this->greeting) = $this->getResponse();
if (PEAR::isError($error = $this->negotiate())) {
return $error;
}
return true;
}
/**
* Attempt to disconnect from the SMTP server.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function disconnect()
{
if (PEAR::isError($error = $this->put('QUIT'))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(221))) {
return $error;
}
if (PEAR::isError($error = $this->socket->disconnect())) {
return PEAR::raiseError(
'Failed to disconnect socket: ' . $error->getMessage()
);
}
return true;
}
/**
* Attempt to send the EHLO command and obtain a list of ESMTP
* extensions available, and failing that just send HELO.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
*
* @since 1.1.0
*/
protected function negotiate()
{
if (PEAR::isError($error = $this->put('EHLO', $this->localhost))) {
return $error;
}
if (PEAR::isError($this->parseResponse(250))) {
/* If the EHLO failed, try the simpler HELO command. */
if (PEAR::isError($error = $this->put('HELO', $this->localhost))) {
return $error;
}
if (PEAR::isError($this->parseResponse(250))) {
return PEAR::raiseError('HELO was not accepted', $this->code);
}
return true;
}
foreach ($this->arguments as $argument) {
$verb = strtok($argument, ' ');
$len = strlen($verb);
$arguments = substr($argument, $len + 1, strlen($argument) - $len - 1);
$this->esmtp[$verb] = $arguments;
}
if (!isset($this->esmtp['PIPELINING'])) {
$this->pipelining = false;
}
return true;
}
/**
* Returns the name of the best authentication method that the server
* has advertised.
*
* @return mixed Returns a string containing the name of the best
* supported authentication method or a PEAR_Error object
* if a failure condition is encountered.
* @since 1.1.0
*/
protected function getBestAuthMethod()
{
$available_methods = explode(' ', $this->esmtp['AUTH']);
foreach ($this->auth_methods as $method => $callback) {
if (in_array($method, $available_methods)) {
return $method;
}
}
return PEAR::raiseError('No supported authentication methods');
}
/**
* Establish STARTTLS Connection.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, true on success, or false if SSL/TLS
* isn't available.
* @since 1.10.0
*/
public function starttls()
{
/* We can only attempt a TLS connection if one has been requested,
* we're running PHP 5.1.0 or later, have access to the OpenSSL
* extension, are connected to an SMTP server which supports the
* STARTTLS extension, and aren't already connected over a secure
* (SSL) socket connection. */
if (version_compare(PHP_VERSION, '5.1.0', '>=')
&& extension_loaded('openssl') && isset($this->esmtp['STARTTLS'])
&& strncasecmp($this->host, 'ssl://', 6) !== 0
) {
/* Start the TLS connection attempt. */
if (PEAR::isError($result = $this->put('STARTTLS'))) {
return $result;
}
if (PEAR::isError($result = $this->parseResponse(220))) {
return $result;
}
if (isset($this->socket_options['ssl']['crypto_method'])) {
$crypto_method = $this->socket_options['ssl']['crypto_method'];
} else {
/* STREAM_CRYPTO_METHOD_TLS_ANY_CLIENT constant does not exist
* and STREAM_CRYPTO_METHOD_SSLv23_CLIENT constant is
* inconsistent across PHP versions. */
$crypto_method = STREAM_CRYPTO_METHOD_TLS_CLIENT
| @STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT
| @STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;
}
if (PEAR::isError($result = $this->socket->enableCrypto(true, $crypto_method))) {
return $result;
} elseif ($result !== true) {
return PEAR::raiseError('STARTTLS failed');
}
/* Send EHLO again to recieve the AUTH string from the
* SMTP server. */
$this->negotiate();
} else {
return false;
}
return true;
}
/**
* Attempt to do SMTP authentication.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $method The requested authentication method. If none is
* specified, the best supported method will be used.
* @param bool $tls Flag indicating whether or not TLS should be attempted.
* @param string $authz An optional authorization identifier. If specified, this
* identifier will be used as the authorization proxy.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function auth($uid, $pwd , $method = '', $tls = true, $authz = '')
{
/* We can only attempt a TLS connection if one has been requested,
* we're running PHP 5.1.0 or later, have access to the OpenSSL
* extension, are connected to an SMTP server which supports the
* STARTTLS extension, and aren't already connected over a secure
* (SSL) socket connection. */
if ($tls) {
/* Start the TLS connection attempt. */
if (PEAR::isError($starttls = $this->starttls())) {
return $starttls;
}
}
if (empty($this->esmtp['AUTH'])) {
return PEAR::raiseError('SMTP server does not support authentication');
}
/* If no method has been specified, get the name of the best
* supported method advertised by the SMTP server. */
if (empty($method)) {
if (PEAR::isError($method = $this->getBestAuthMethod())) {
/* Return the PEAR_Error object from _getBestAuthMethod(). */
return $method;
}
} else {
$method = strtoupper($method);
if (!array_key_exists($method, $this->auth_methods)) {
return PEAR::raiseError("$method is not a supported authentication method");
}
}
if (!isset($this->auth_methods[$method])) {
return PEAR::raiseError("$method is not a supported authentication method");
}
if (!is_callable($this->auth_methods[$method], false)) {
return PEAR::raiseError("$method authentication method cannot be called");
}
if (is_array($this->auth_methods[$method])) {
list($object, $method) = $this->auth_methods[$method];
$result = $object->{$method}($uid, $pwd, $authz, $this);
} else {
$func = $this->auth_methods[$method];
$result = $func($uid, $pwd, $authz, $this);
}
/* If an error was encountered, return the PEAR_Error object. */
if (PEAR::isError($result)) {
return $result;
}
return true;
}
/**
* Add a new authentication method.
*
* @param string $name The authentication method name (e.g. 'PLAIN')
* @param mixed $callback The authentication callback (given as the name of a
* function or as an (object, method name) array).
* @param bool $prepend Should the new method be prepended to the list of
* available methods? This is the default behavior,
* giving the new method the highest priority.
*
* @return mixed True on success or a PEAR_Error object on failure.
*
* @since 1.6.0
*/
public function setAuthMethod($name, $callback, $prepend = true)
{
if (!is_string($name)) {
return PEAR::raiseError('Method name is not a string');
}
if (!is_string($callback) && !is_array($callback)) {
return PEAR::raiseError('Method callback must be string or array');
}
if (is_array($callback)) {
if (!is_object($callback[0]) || !is_string($callback[1])) {
return PEAR::raiseError('Bad mMethod callback array');
}
}
if ($prepend) {
$this->auth_methods = array_merge(
array($name => $callback), $this->auth_methods
);
} else {
$this->auth_methods[$name] = $callback;
}
return true;
}
/**
* Authenticates the user using the DIGEST-MD5 method.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $authz The optional authorization proxy identifier.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.1.0
*/
protected function authDigestMD5($uid, $pwd, $authz = '')
{
if (PEAR::isError($error = $this->put('AUTH', 'DIGEST-MD5'))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
/* 503: Error: already authenticated */
if ($this->code === 503) {
return true;
}
return $error;
}
$auth_sasl = new Auth_SASL;
$digest = $auth_sasl->factory('digest-md5');
$challenge = base64_decode($this->arguments[0]);
$auth_str = base64_encode(
$digest->getResponse($uid, $pwd, $challenge, $this->host, "smtp", $authz)
);
if (PEAR::isError($error = $this->put($auth_str))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
return $error;
}
/* We don't use the protocol's third step because SMTP doesn't
* allow subsequent authentication, so we just silently ignore
* it. */
if (PEAR::isError($error = $this->put(''))) {
return $error;
}
/* 235: Authentication successful */
if (PEAR::isError($error = $this->parseResponse(235))) {
return $error;
}
}
/**
* Authenticates the user using the CRAM-MD5 method.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $authz The optional authorization proxy identifier.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.1.0
*/
protected function authCRAMMD5($uid, $pwd, $authz = '')
{
if (PEAR::isError($error = $this->put('AUTH', 'CRAM-MD5'))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
/* 503: Error: already authenticated */
if ($this->code === 503) {
return true;
}
return $error;
}
$auth_sasl = new Auth_SASL;
$challenge = base64_decode($this->arguments[0]);
$cram = $auth_sasl->factory('cram-md5');
$auth_str = base64_encode($cram->getResponse($uid, $pwd, $challenge));
if (PEAR::isError($error = $this->put($auth_str))) {
return $error;
}
/* 235: Authentication successful */
if (PEAR::isError($error = $this->parseResponse(235))) {
return $error;
}
}
/**
* Authenticates the user using the LOGIN method.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $authz The optional authorization proxy identifier.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.1.0
*/
protected function authLogin($uid, $pwd, $authz = '')
{
if (PEAR::isError($error = $this->put('AUTH', 'LOGIN'))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
/* 503: Error: already authenticated */
if ($this->code === 503) {
return true;
}
return $error;
}
if (PEAR::isError($error = $this->put(base64_encode($uid)))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
return $error;
}
if (PEAR::isError($error = $this->put(base64_encode($pwd)))) {
return $error;
}
/* 235: Authentication successful */
if (PEAR::isError($error = $this->parseResponse(235))) {
return $error;
}
return true;
}
/**
* Authenticates the user using the PLAIN method.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $authz The optional authorization proxy identifier.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.1.0
*/
protected function authPlain($uid, $pwd, $authz = '')
{
if (PEAR::isError($error = $this->put('AUTH', 'PLAIN'))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
/* 503: Error: already authenticated */
if ($this->code === 503) {
return true;
}
return $error;
}
$auth_str = base64_encode($authz . chr(0) . $uid . chr(0) . $pwd);
if (PEAR::isError($error = $this->put($auth_str))) {
return $error;
}
/* 235: Authentication successful */
if (PEAR::isError($error = $this->parseResponse(235))) {
return $error;
}
return true;
}
/**
* Authenticates the user using the GSSAPI method.
*
* PHP krb5 extension is required,
* service principal and credentials cache must be set.
*
* @param string $uid The userid to authenticate as.
* @param string $pwd The password to authenticate with.
* @param string $authz The optional authorization proxy identifier.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
*/
protected function authGSSAPI($uid, $pwd, $authz = '')
{
if (PEAR::isError($error = $this->put('AUTH', 'GSSAPI'))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
/* 503: Error: already authenticated */
if ($this->code === 503) {
return true;
}
return $error;
}
if (!$this->gssapi_principal) {
return PEAR::raiseError('No Kerberos service principal set', 2);
}
if (!empty($this->gssapi_cname)) {
putenv('KRB5CCNAME=' . $this->gssapi_cname);
}
try {
$ccache = new KRB5CCache();
if (!empty($this->gssapi_cname)) {
$ccache->open($this->gssapi_cname);
}
$gssapicontext = new GSSAPIContext();
$gssapicontext->acquireCredentials($ccache);
$token = '';
$success = $gssapicontext->initSecContext($this->gssapi_principal, null, null, null, $token);
$token = base64_encode($token);
}
catch (Exception $e) {
return PEAR::raiseError('GSSAPI authentication failed: ' . $e->getMessage());
}
if (PEAR::isError($error = $this->put($token))) {
return $error;
}
/* 334: Continue authentication request */
if (PEAR::isError($error = $this->parseResponse(334))) {
return $error;
}
$response = $this->arguments[0];
try {
$challenge = base64_decode($response);
$gssapicontext->unwrap($challenge, $challenge);
$gssapicontext->wrap($challenge, $challenge, true);
}
catch (Exception $e) {
return PEAR::raiseError('GSSAPI authentication failed: ' . $e->getMessage());
}
if (PEAR::isError($error = $this->put(base64_encode($challenge)))) {
return $error;
}
/* 235: Authentication successful */
if (PEAR::isError($error = $this->parseResponse(235))) {
return $error;
}
return true;
}
/**
* Authenticates the user using the XOAUTH2 method.
*
* @param string $uid The userid to authenticate as.
* @param string $token The access token to authenticate with.
* @param string $authz The optional authorization proxy identifier.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.9.0
*/
public function authXOAuth2($uid, $token, $authz, $conn)
{
$auth = base64_encode("user=$uid\1auth=$token\1\1");
if (PEAR::isError($error = $this->put('AUTH', 'XOAUTH2 ' . $auth))) {
return $error;
}
/* 235: Authentication successful or 334: Continue authentication */
if (PEAR::isError($error = $this->parseResponse([235, 334]))) {
return $error;
}
/* 334: Continue authentication request */
if ($this->code === 334) {
/* Send an empty line as response to 334 */
if (PEAR::isError($error = $this->put(''))) {
return $error;
}
/* Expect 235: Authentication successful */
if (PEAR::isError($error = $this->parseResponse(235))) {
return $error;
}
}
return true;
}
/**
* Send the HELO command.
*
* @param string $domain The domain name to say we are.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function helo($domain)
{
if (PEAR::isError($error = $this->put('HELO', $domain))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(250))) {
return $error;
}
return true;
}
/**
* Return the list of SMTP service extensions advertised by the server.
*
* @return array The list of SMTP service extensions.
* @since 1.3
*/
public function getServiceExtensions()
{
return $this->esmtp;
}
/**
* Send the MAIL FROM: command.
*
* @param string $sender The sender (reverse path) to set.
* @param string $params String containing additional MAIL parameters,
* such as the NOTIFY flags defined by RFC 1891
* or the VERP protocol.
*
* If $params is an array, only the 'verp' option
* is supported. If 'verp' is true, the XVERP
* parameter is appended to the MAIL command.
* If the 'verp' value is a string, the full
* XVERP=value parameter is appended.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function mailFrom($sender, $params = null)
{
$args = "FROM:<$sender>";
/* Support the deprecated array form of $params. */
if (is_array($params) && isset($params['verp'])) {
if ($params['verp'] === true) {
$args .= ' XVERP';
} elseif (trim($params['verp'])) {
$args .= ' XVERP=' . $params['verp'];
}
} elseif (is_string($params) && !empty($params)) {
$args .= ' ' . $params;
}
if (PEAR::isError($error = $this->put('MAIL', $args))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(250, $this->pipelining))) {
return $error;
}
return true;
}
/**
* Send the RCPT TO: command.
*
* @param string $recipient The recipient (forward path) to add.
* @param string $params String containing additional RCPT parameters,
* such as the NOTIFY flags defined by RFC 1891.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
*
* @since 1.0
*/
public function rcptTo($recipient, $params = null)
{
$args = "TO:<$recipient>";
if (is_string($params)) {
$args .= ' ' . $params;
}
if (PEAR::isError($error = $this->put('RCPT', $args))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(array(250, 251), $this->pipelining))) {
return $error;
}
return true;
}
/**
* Quote the data so that it meets SMTP standards.
*
* This is provided as a separate public function to facilitate
* easier overloading for the cases where it is desirable to
* customize the quoting behavior.
*
* @param string &$data The message text to quote. The string must be passed
* by reference, and the text will be modified in place.
*
* @since 1.2
*/
public function quotedata(&$data)
{
/* Because a single leading period (.) signifies an end to the
* data, legitimate leading periods need to be "doubled" ('..'). */
$data = preg_replace('/^\./m', '..', $data);
/* Change Unix (\n) and Mac (\r) linefeeds into CRLF's (\r\n). */
$data = preg_replace('/(?:\r\n|\n|\r(?!\n))/', "\r\n", $data);
}
/**
* Send the DATA command.
*
* @param mixed $data The message data, either as a string or an open
* file resource.
* @param string $headers The message headers. If $headers is provided,
* $data is assumed to contain only body data.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function data($data, $headers = null)
{
/* Verify that $data is a supported type. */
if (!is_string($data) && !is_resource($data)) {
return PEAR::raiseError('Expected a string or file resource');
}
/* Start by considering the size of the optional headers string. We
* also account for the addition 4 character "\r\n\r\n" separator
* sequence. */
$size = $headers_size = (is_null($headers)) ? 0 : strlen($headers) + 4;
if (is_resource($data)) {
$stat = fstat($data);
if ($stat === false) {
return PEAR::raiseError('Failed to get file size');
}
$size += $stat['size'];
} else {
$size += strlen($data);
}
/* RFC 1870, section 3, subsection 3 states "a value of zero indicates
* that no fixed maximum message size is in force". Furthermore, it
* says that if "the parameter is omitted no information is conveyed
* about the server's fixed maximum message size". */
$limit = (isset($this->esmtp['SIZE'])) ? $this->esmtp['SIZE'] : 0;
if ($limit > 0 && $size >= $limit) {
return PEAR::raiseError('Message size exceeds server limit');
}
/* Initiate the DATA command. */
if (PEAR::isError($error = $this->put('DATA'))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(354))) {
return $error;
}
/* If we have a separate headers string, send it first. */
if (!is_null($headers)) {
$this->quotedata($headers);
if (PEAR::isError($result = $this->send($headers . "\r\n\r\n"))) {
return $result;
}
/* Subtract the headers size now that they've been sent. */
$size -= $headers_size;
}
/* Now we can send the message body data. */
if (is_resource($data)) {
/* Stream the contents of the file resource out over our socket
* connection, line by line. Each line must be run through the
* quoting routine. */
while (strlen($line = fread($data, 8192)) > 0) {
/* If the last character is an newline, we need to grab the
* next character to check to see if it is a period. */
while (!feof($data)) {
$char = fread($data, 1);
$line .= $char;
if ($char != "\n") {
break;
}
}
$this->quotedata($line);
if (PEAR::isError($result = $this->send($line))) {
return $result;
}
}
$last = $line;
} else {
/*
* Break up the data by sending one chunk (up to 512k) at a time.
* This approach reduces our peak memory usage.
*/
for ($offset = 0; $offset < $size;) {
$end = $offset + 512000;
/*
* Ensure we don't read beyond our data size or span multiple
* lines. quotedata() can't properly handle character data
* that's split across two line break boundaries.
*/
if ($end >= $size) {
$end = $size;
} else {
for (; $end < $size; $end++) {
if ($data[$end] != "\n") {
break;
}
}
}
/* Extract our chunk and run it through the quoting routine. */
$chunk = substr($data, $offset, $end - $offset);
$this->quotedata($chunk);
/* If we run into a problem along the way, abort. */
if (PEAR::isError($result = $this->send($chunk))) {
return $result;
}
/* Advance the offset to the end of this chunk. */
$offset = $end;
}
$last = $chunk;
}
/* Don't add another CRLF sequence if it's already in the data */
$terminator = (substr($last, -2) == "\r\n" ? '' : "\r\n") . ".\r\n";
/* Finally, send the DATA terminator sequence. */
if (PEAR::isError($result = $this->send($terminator))) {
return $result;
}
/* Verify that the data was successfully received by the server. */
if (PEAR::isError($error = $this->parseResponse(250, $this->pipelining))) {
return $error;
}
return true;
}
/**
* Send the SEND FROM: command.
*
* @param string $path The reverse path to send.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.2.6
*/
public function sendFrom($path)
{
if (PEAR::isError($error = $this->put('SEND', "FROM:<$path>"))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(250, $this->pipelining))) {
return $error;
}
return true;
}
/**
* Send the SOML FROM: command.
*
* @param string $path The reverse path to send.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.2.6
*/
public function somlFrom($path)
{
if (PEAR::isError($error = $this->put('SOML', "FROM:<$path>"))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(250, $this->pipelining))) {
return $error;
}
return true;
}
/**
* Send the SAML FROM: command.
*
* @param string $path The reverse path to send.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.2.6
*/
public function samlFrom($path)
{
if (PEAR::isError($error = $this->put('SAML', "FROM:<$path>"))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(250, $this->pipelining))) {
return $error;
}
return true;
}
/**
* Send the RSET command.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function rset()
{
if (PEAR::isError($error = $this->put('RSET'))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(250, $this->pipelining))) {
return $error;
}
return true;
}
/**
* Send the VRFY command.
*
* @param string $string The string to verify
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function vrfy($string)
{
/* Note: 251 is also a valid response code */
if (PEAR::isError($error = $this->put('VRFY', $string))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(array(250, 252)))) {
return $error;
}
return true;
}
/**
* Send the NOOP command.
*
* @return mixed Returns a PEAR_Error with an error message on any
* kind of failure, or true on success.
* @since 1.0
*/
public function noop()
{
if (PEAR::isError($error = $this->put('NOOP'))) {
return $error;
}
if (PEAR::isError($error = $this->parseResponse(250))) {
return $error;
}
return true;
}
/**
* Backwards-compatibility method. identifySender()'s functionality is
* now handled internally.
*
* @return boolean This method always return true.
*
* @since 1.0
*/
public function identifySender()
{
return true;
}
}