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1	<?php
2
3	namespace AcyMailing\Libraries\Pear;
4
5	acym_cmsLoaded();
6
7	// +-----------------------------------------------------------------------+
8	// \| Copyright (c) 2002, Richard Heyes \|
9	// \| All rights reserved. \|
10	// \| \|
11	// \| Redistribution and use in source and binary forms, with or without \|
12	// \| modification, are permitted provided that the following conditions \|
13	// \| are met: \|
14	// \| \|
15	// \| o Redistributions of source code must retain the above copyright \|
16	// \| notice, this list of conditions and the following disclaimer. \|
17	// \| o Redistributions in binary form must reproduce the above copyright \|
18	// \| notice, this list of conditions and the following disclaimer in the \|
19	// \| documentation and/or other materials provided with the distribution.\|
20	// \| o The names of the authors may not be used to endorse or promote \|
21	// \| products derived from this software without specific prior written \|
22	// \| permission. \|
23	// \| \|
24	// \| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \|
25	// \| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT \|
26	// \| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR \|
27	// \| A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT \|
28	// \| OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, \|
29	// \| SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT \|
30	// \| LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, \|
31	// \| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY \|
32	// \| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT \|
33	// \| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE \|
34	// \| OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. \|
35	// \| \|
36	// +-----------------------------------------------------------------------+
37	// \| Author: Richard Heyes <[email protected]> \|
38	// \| Co-Author: Damian Fernandez Sosa <[email protected]> \|
39	// +-----------------------------------------------------------------------+
40	//
41	// $Id: POP3.php 295243 2010-02-18 22:05:20Z clockwerx $
42
43	/**
44	* +----------------------------- IMPORTANT ------------------------------+
45	* \| Usage of this class compared to native php extensions such as IMAP \|
46	* \| is slow and may be feature deficient. If available you are STRONGLY \|
47	* \| recommended to use the php extensions. \|
48	* +----------------------------------------------------------------------+
49	*
50	* POP3 Access Class
51	*
52	* For usage see the example script
53	*/
54
55	define('NET_POP3_STATE_DISCONNECTED', 1);
56	define('NET_POP3_STATE_AUTHORISATION', 2);
57	define('NET_POP3_STATE_TRANSACTION', 4);
58
59	class Pop3
60	{
61
62	/**
63	* Some basic information about the mail drop
64	* garnered from the STAT command
65	*
66	* @var array
67	*/
68	var $_maildrop;
69
70	/**
71	* Used for APOP to store the timestamp
72	*
73	* @var string
74	*/
75	var $_timestamp;
76
77	/**
78	* Timeout that is passed to the socket object
79	*
80	* @var integer
81	*/
82	var $_timeout;
83
84	/**
85	* Socket object
86	*
87	* @var object
88	*/
89	var $_socket;
90
91	/**
92	* Current state of the connection. Used with the
93	* constants defined above.
94	*
95	* @var integer
96	*/
97	var $_state;
98
99	/**
100	* Hostname to connect to
101	*
102	* @var string
103	*/
104	var $_host;
105
106	/**
107	* Port to connect to
108	*
109	* @var integer
110	*/
111	var $_port;
112
113	/**
114	* To allow class debuging
115	* @var boolean
116	*/
117	var $_debug = false;
118
119
120	/**
121	* The auth methods this class support
122	* @var array
123	*/
124	//var $supportedAuthMethods=array('DIGEST-MD5', 'CRAM-MD5', 'APOP' , 'PLAIN' , 'LOGIN', 'USER');
125	//Disabling DIGEST-MD5 for now
126	var $supportedAuthMethods = ['CRAM-MD5', 'APOP', 'PLAIN', 'LOGIN', 'USER'];
127	//var $supportedAuthMethods=array( 'CRAM-MD5', 'PLAIN' , 'LOGIN');
128	//var $supportedAuthMethods=array( 'PLAIN' , 'LOGIN');
129
130
131	/**
132	* The auth methods this class support
133	* @var array
134	*/
135	var $supportedSASLAuthMethods = ['DIGEST-MD5', 'CRAM-MD5'];
136
137
138	/**
139	* The capability response
140	* @var array
141	*/
142	var $_capability;
143
144
145	/**
146	* Constructor. Sets up the object variables, and instantiates
147	* the socket object.
148	*
149	*/
150	function __construct()
151	{
152	$this->_timestamp = ''; // Used for APOP
153	$this->_maildrop = [];
154	$this->_timeout = 3;
155	$this->_state = NET_POP3_STATE_DISCONNECTED;
156	$this->_socket = new Socket();
157	/*
158	* Include the Auth_SASL package. If the package is not available,
159	* we disable the authentication methods that depend upon it.
160	*/
161	if (!class_exists('Auth_SASL')) {
162	if ($this->_debug) {
163	echo "AUTH_SASL NOT PRESENT!\n";
164	}
165	foreach ($this->supportedSASLAuthMethods as $SASLMethod) {
166	$pos = array_search($SASLMethod, $this->supportedAuthMethods);
167	if ($this->_debug) {
168	echo "DISABLING METHOD $SASLMethod\n";
169	}
170	unset($this->supportedAuthMethods[$pos]);
171	}
172	}
173	}
174
175
176	/**
177	* Handles the errors the class can find
178	* on the server
179	*
180	* @access private
181	* @return Error
182	*/
183	function _raiseError($msg, $code = -1)
184	{
185	return Pear::raiseError($msg, $code);
186	}
187
188
189	/**
190	* Connects to the given host on the given port.
191	* Also looks for the timestamp in the greeting
192	* needed for APOP authentication
193	*
194	* @param string $host Hostname/IP address to connect to
195	* @param string $port Port to use to connect to on host
196	*
197	* @return bool Success/Failure
198	*/
199	function connect($host = 'localhost', $port = 110)
200	{
201	$this->_host = $host;
202	$this->_port = $port;
203
204	$result = $this->_socket->connect($host, $port, false, $this->_timeout);
205	if ($result === true) {
206	$data = $this->_recvLn();
207
208	if ($this->_checkResponse($data)) {
209	// if the response begins with '+OK' ...
210	// if (@substr(strtoupper($data), 0, 3) == '+OK') {
211	// Check for string matching apop timestamp
212	if (preg_match('/<.+@.+>/U', $data, $matches)) {
213	$this->_timestamp = $matches[0];
214	}
215	$this->_maildrop = [];
216	$this->_state = NET_POP3_STATE_AUTHORISATION;
217
218	return true;
219	}
220	}
221
222	$this->_socket->disconnect();
223
224	return false;
225	}
226
227
228	/**
229	* Disconnect function. Sends the QUIT command
230	* and closes the socket.
231	*
232	* @return bool Success/Failure
233	*/
234	function disconnect()
235	{
236	return $this->_cmdQuit();
237	}
238
239
240	/**
241	* Performs the login procedure. If there is a timestamp
242	* stored, APOP will be tried first, then basic USER/PASS.
243	*
244	* @param string $user Username to use
245	* @param string $pass Password to use
246	* @param mixed $apop Whether to try APOP first, if used as string you can select the auth methd to use ( $pop3->login('validlogin', 'validpass', "CRAM-MD5");
247	* Valid methods are: 'DIGEST-MD5','CRAM-MD5','LOGIN','PLAIN','APOP','USER'
248	*
249	* @return mixed true on Success/ Error on error
250	*/
251	function login($user, $pass, $apop = true)
252	{
253	if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
254
255	if (Pear::isError($ret = $this->_cmdAuthenticate($user, $pass, $apop))) {
256	return $ret;
257	}
258	if (!Pear::isError($ret)) {
259	$this->_state = NET_POP3_STATE_TRANSACTION;
260
261	return true;
262	}
263	}
264
265	return $this->_raiseError('Generic login error', 1);
266	}
267
268
269	/**
270	* Parses the response from the capability command. Stores
271	* the result in $this->_capability
272	*
273	* @access private
274	*/
275	function _parseCapability()
276	{
277
278	if (!Pear::isError($data = $this->_sendCmd('CAPA'))) {
279	$data = $this->_getMultiline();
280	} else {
281	// CAPA command not supported, reset data var
282	// to avoid Notice errors of preg_split on an object
283	$data = '';
284	}
285	$data = preg_split('/\r?\n/', $data, -1, PREG_SPLIT_NO_EMPTY);
286
287	for ($i = 0 ; $i < count($data) ; $i++) {
288
289	$capa = '';
290	if (preg_match('/^([a-z,\-]+)( ((.*))\|$)$/i', $data[$i], $matches)) {
291
292	$capa = strtolower($matches[1]);
293	switch ($capa) {
294	case 'implementation':
295	$this->_capability['implementation'] = $matches[3];
296	break;
297	case 'sasl':
298	$this->_capability['sasl'] = preg_split('/\s+/', $matches[3]);
299	break;
300	default :
301	$this->_capability[$capa] = $matches[2];
302	break;
303	}
304	}
305	}
306	}
307
308
309	/**
310	* Returns the name of the best authentication method that the server
311	* has advertised.
312	*
313	* @param string if !=null,authenticate with this method ($userMethod).
314	*
315	* @return mixed Returns a string containing the name of the best
316	* supported authentication method or a Error object
317	* if a failure condition is encountered.
318	* @access private
319	* @since 1.0
320	*/
321	function _getBestAuthMethod($userMethod = null)
322	{
323	/*
324	return 'USER';
325	return 'APOP';
326	return 'DIGEST-MD5';
327	return 'CRAM-MD5';
328	*/
329
330	$this->_parseCapability();
331
332	//unset($this->_capability['sasl']);
333
334	if (isset($this->_capability['sasl'])) {
335	$serverMethods = $this->_capability['sasl'];
336	} else {
337	$serverMethods = ['USER'];
338	// Check for timestamp before attempting APOP
339	if ($this->_timestamp != null) {
340	$serverMethods[] = 'APOP';
341	}
342	}
343
344	if ($userMethod !== null && $userMethod !== true) {
345	$methods = [];
346	$methods[] = $userMethod;
347
348	return $userMethod;
349	} else {
350	$methods = $this->supportedAuthMethods;
351	}
352
353	if (($methods != null) && ($serverMethods != null)) {
354
355	foreach ($methods as $method) {
356
357	if (in_array($method, $serverMethods)) {
358	return $method;
359	}
360	}
361	$serverMethods = implode(',', $serverMethods);
362	$myMethods = implode(',', $this->supportedAuthMethods);
363
364	return $this->_raiseError(
365	"$method NOT supported authentication method!. This server ".
366	"supports these methods: $serverMethods, but I support $myMethods"
367	);
368	} else {
369	return $this->_raiseError("This server don't support any Auth methods");
370	}
371	}
372
373
374	/**
375	* Handles the authentication using any known method
376	*
377	* @param string The userid to authenticate as.
378	* @param string The password to authenticate with.
379	* @param string The method to use ( if $usermethod == '' then the class chooses the best method (the stronger is the best ) )
380	*
381	* @return mixed string or Error
382	* @access private
383	* @since 1.0
384	*/
385	function _cmdAuthenticate($uid, $pwd, $userMethod = null)
386	{
387
388	if (Pear::isError($method = $this->_getBestAuthMethod($userMethod))) {
389	return $method;
390	}
391
392	if (!in_array($userMethod, $this->supportedAuthMethods)) {
393	return $this->_raiseError(
394	'Authentication method "'.$userMethod.'" is not supported.'
395	);
396	}
397
398	switch ($method) {
399	case 'DIGEST-MD5':
400	$result = $this->_authDigest_MD5($uid, $pwd);
401	break;
402	case 'CRAM-MD5':
403	$result = $this->_authCRAM_MD5($uid, $pwd);
404	break;
405	case 'LOGIN':
406	$result = $this->_authLOGIN($uid, $pwd);
407	break;
408	case 'PLAIN':
409	$result = $this->_authPLAIN($uid, $pwd);
410	break;
411	case 'APOP':
412	$result = $this->_cmdApop($uid, $pwd);
413	// if APOP fails fallback to USER auth
414	if (Pear::isError($result)) {
415	//echo "APOP FAILED!!!\n";
416	$result = $this->_authUSER($uid, $pwd);
417	}
418	break;
419	case 'USER':
420	$result = $this->_authUSER($uid, $pwd);
421	break;
422
423
424	default :
425	$result = $this->_raiseError("$method is not a supported authentication method");
426	break;
427	}
428
429	return $result;
430	}
431
432
433	/**
434	* Authenticates the user using the USER-PASS method.
435	*
436	* @param string The userid to authenticate as.
437	* @param string The password to authenticate with.
438	*
439	* @return mixed true on success or Error on failure
440	*
441	* @access private
442	* @since 1.0
443	*/
444	function _authUSER($user, $pass)
445	{
446	if (Pear::isError($ret = $this->_cmdUser($user))) {
447	return $ret;
448	}
449	if (Pear::isError($ret = $this->_cmdPass($pass))) {
450	return $ret;
451	}
452
453	return true;
454	}
455
456
457	/**
458	* Authenticates the user using the PLAIN method.
459	*
460	* @param string The userid to authenticate as.
461	* @param string The password to authenticate with.
462	*
463	* @return array Returns an array containing the response
464	*
465	* @access private
466	* @since 1.0
467	*/
468	function _authPLAIN($user, $pass)
469	{
470	$cmd = sprintf('AUTH PLAIN %s', base64_encode(chr(0).$user.chr(0).$pass));
471
472	if (Pear::isError($ret = $this->_send($cmd))) {
473	return $ret;
474	}
475	if (Pear::isError($challenge = $this->_recvLn())) {
476	return $challenge;
477	}
478	if (Pear::isError($ret = $this->_checkResponse($challenge))) {
479	return $ret;
480	}
481
482	return true;
483	}
484
485
486	/**
487	* Authenticates the user using the PLAIN method.
488	*
489	* @param string The userid to authenticate as.
490	* @param string The password to authenticate with.
491	*
492	* @return array Returns an array containing the response
493	*
494	* @access private
495	* @since 1.0
496	*/
497	function _authLOGIN($user, $pass)
498	{
499	$this->_send('AUTH LOGIN');
500
501	if (Pear::isError($challenge = $this->_recvLn())) {
502	return $challenge;
503	}
504	if (Pear::isError($ret = $this->_checkResponse($challenge))) {
505	return $ret;
506	}
507
508
509	if (Pear::isError($ret = $this->_send(sprintf('%s', base64_encode($user))))) {
510	return $ret;
511	}
512
513	if (Pear::isError($challenge = $this->_recvLn())) {
514	return $challenge;
515	}
516	if (Pear::isError($ret = $this->_checkResponse($challenge))) {
517	return $ret;
518	}
519
520	if (Pear::isError($ret = $this->_send(sprintf('%s', base64_encode($pass))))) {
521	return $ret;
522	}
523
524	if (Pear::isError($challenge = $this->_recvLn())) {
525	return $challenge;
526	}
527
528	return $this->_checkResponse($challenge);
529	}
530
531
532	/**
533	* Authenticates the user using the CRAM-MD5 method.
534	*
535	* @param string The userid to authenticate as.
536	* @param string The password to authenticate with.
537	*
538	* @return array Returns an array containing the response
539	*
540	* @access private
541	* @since 1.0
542	*/
543	function _authCRAM_MD5($uid, $pwd)
544	{
545	if (Pear::isError($ret = $this->_send('AUTH CRAM-MD5'))) {
546	return $ret;
547	}
548
549	if (Pear::isError($challenge = $this->_recvLn())) {
550	return $challenge;
551	}
552	if (Pear::isError($ret = $this->_checkResponse($challenge))) {
553	return $ret;
554	}
555
556	// remove '+ '
557
558	$challenge = substr($challenge, 2);
559
560	$challenge = base64_decode($challenge);
561
562	$cram = &Auth_SASL::factory('crammd5');
563	$auth_str = base64_encode($cram->getResponse($uid, $pwd, $challenge));
564
565
566	if (Pear::isError($error = $this->_send($auth_str))) {
567	return $error;
568	}
569	if (Pear::isError($ret = $this->_recvLn())) {
570	return $ret;
571	}
572
573	//echo "RET:$ret\n";
574	return $this->_checkResponse($ret);
575	}
576
577
578	/**
579	* Authenticates the user using the DIGEST-MD5 method.
580	*
581	* @param string The userid to authenticate as.
582	* @param string The password to authenticate with.
583	* @param string The efective user
584	*
585	* @return array Returns an array containing the response
586	*
587	* @access private
588	* @since 1.0
589	*/
590	function _authDigest_MD5($uid, $pwd)
591	{
592	if (Pear::isError($ret = $this->_send('AUTH DIGEST-MD5'))) {
593	return $ret;
594	}
595
596	if (Pear::isError($challenge = $this->_recvLn())) {
597	return $challenge;
598	}
599	if (Pear::isError($ret = $this->_checkResponse($challenge))) {
600	return $ret;
601	}
602
603	// remove '+ '
604	$challenge = substr($challenge, 2);
605
606	$challenge = base64_decode($challenge);
607	$digest = &Auth_SASL::factory('digestmd5');
608	$auth_str = base64_encode($digest->getResponse($uid, $pwd, $challenge, "localhost", "pop3"));
609
610	if (Pear::isError($error = $this->_send($auth_str))) {
611	return $error;
612	}
613
614	if (Pear::isError($challenge = $this->_recvLn())) {
615	return $challenge;
616	}
617	if (Pear::isError($ret = $this->_checkResponse($challenge))) {
618	return $ret;
619	}
620	/*
621	* We don't use the protocol's third step because POP3 doesn't allow
622	* subsequent authentication, so we just silently ignore it.
623	*/
624
625	if (Pear::isError($challenge = $this->_send("\r\n"))) {
626	return $challenge;
627	}
628
629	if (Pear::isError($challenge = $this->_recvLn())) {
630	return $challenge;
631	}
632
633	return $this->_checkResponse($challenge);
634	}
635
636
637	/**
638	* Sends the APOP command
639	*
640	* @param $user Username to send
641	* @param $pass Password to send
642	*
643	* @return bool Success/Failure
644	*/
645	function _cmdApop($user, $pass)
646	{
647	if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
648
649	if (!empty($this->_timestamp)) {
650	if (Pear::isError($data = $this->_sendCmd('APOP '.$user.' '.md5($this->_timestamp.$pass)))) {
651	return $data;
652	}
653	$this->_state = NET_POP3_STATE_TRANSACTION;
654
655	return true;
656	}
657	}
658
659	return $this->_raiseError('Not In NET_POP3_STATE_AUTHORISATION State1');
660	}
661
662
663	/**
664	* Returns the raw headers of the specified message.
665	*
666	* @param integer $msg_id Message number
667	*
668	* @return mixed Either raw headers or false on error
669	*/
670	function getRawHeaders($msg_id)
671	{
672	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
673	return $this->_cmdTop($msg_id, 0);
674	}
675
676	return false;
677	}
678
679	/**
680	* Returns the headers of the specified message in an
681	* associative array. Array keys are the header names, array
682	* values are the header values. In the case of multiple headers
683	* having the same names, eg Received:, the array value will be
684	* an indexed array of all the header values.
685	*
686	* @param integer $msg_id Message number
687	*
688	* @return mixed Either array of headers or false on error
689	*/
690	function getParsedHeaders($msg_id)
691	{
692	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
693
694	$raw_headers = rtrim($this->getRawHeaders($msg_id));
695
696	$raw_headers = preg_replace("/\r\n[ \t]+/", ' ', $raw_headers); // Unfold headers
697	$raw_headers = explode("\r\n", $raw_headers);
698	foreach ($raw_headers as $value) {
699	$name = substr($value, 0, $pos = strpos($value, ':'));
700	$value = ltrim(substr($value, $pos + 1));
701	if (isset($headers[$name]) and is_array($headers[$name])) {
702	$headers[$name][] = $value;
703	} elseif (isset($headers[$name])) {
704	$headers[$name] = [$headers[$name], $value];
705	} else {
706	$headers[$name] = $value;
707	}
708	}
709
710	return $headers;
711	}
712
713	return false;
714	}
715
716	/**
717	* Returns the body of the message with given message number.
718	*
719	* @param integer $msg_id Message number
720	*
721	* @return mixed Either message body or false on error
722	*/
723	function getBody($msg_id)
724	{
725	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
726	$msg = $this->_cmdRetr($msg_id);
727
728	return substr($msg, strpos($msg, "\r\n\r\n") + 4);
729	}
730
731	return false;
732	}
733
734	/**
735	* Returns the entire message with given message number.
736	*
737	* @param integer $msg_id Message number
738	*
739	* @return mixed Either entire message or false on error
740	*/
741	function getMsg($msg_id)
742	{
743	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
744	return $this->_cmdRetr($msg_id);
745	}
746
747	return false;
748	}
749
750	/**
751	* Returns the size of the maildrop
752	*
753	* @return mixed Either size of maildrop or false on error
754	*/
755	function getSize()
756	{
757	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
758	if (isset($this->_maildrop['size'])) {
759	return $this->_maildrop['size'];
760	} else {
761	[, $size] = $this->_cmdStat();
762
763	return $size;
764	}
765	}
766
767	return false;
768	}
769
770	/**
771	* Returns number of messages in this maildrop
772	*
773	* @return mixed Either number of messages or false on error
774	*/
775	function numMsg()
776	{
777	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
778	if (isset($this->_maildrop['num_msg'])) {
779	return $this->_maildrop['num_msg'];
780	} else {
781	[$num_msg,] = $this->_cmdStat();
782
783	return $num_msg;
784	}
785	}
786
787	return false;
788	}
789
790	/**
791	* Marks a message for deletion. Only will be deleted if the
792	* disconnect() method is called.
793	*
794	* @param integer $msg_id Message to delete
795	*
796	* @return bool Success/Failure
797	*/
798	function deleteMsg($msg_id)
799	{
800	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
801	return $this->_cmdDele($msg_id);
802	}
803
804	return false;
805	}
806
807	/**
808	* Combination of LIST/UIDL commands, returns an array
809	* of data
810	*
811	* @param integer $msg_id Optional message number
812	*
813	* @return mixed Array of data or false on error
814	*/
815	function getListing($msg_id = null)
816	{
817
818	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
819	if (!isset($msg_id)) {
820
821	$list = [];
822	if ($list = $this->_cmdList()) {
823	if ($uidl = $this->_cmdUidl()) {
824	foreach ($uidl as $i => $value) {
825	$list[$i]['uidl'] = $value['uidl'];
826	}
827	}
828
829	return $list;
830	} else {
831	return [];
832	}
833	} else {
834	if ($list = $this->_cmdList($msg_id) and $uidl = $this->_cmdUidl($msg_id)) {
835	return array_merge($list, $uidl);
836	}
837	}
838	}
839
840	return false;
841	}
842
843
844	/**
845	* Sends the USER command
846	*
847	* @param string $user Username to send
848	*
849	* @return bool Success/Failure
850	*/
851	function _cmdUser($user)
852	{
853	if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
854	return $this->_sendCmd('USER '.$user);
855	}
856
857	return $this->_raiseError('Not In NET_POP3_STATE_AUTHORISATION State');
858	}
859
860
861	/**
862	* Sends the PASS command
863	*
864	* @param string $pass Password to send
865	*
866	* @return bool Success/Failure
867	*/
868	function _cmdPass($pass)
869	{
870	if ($this->_state == NET_POP3_STATE_AUTHORISATION) {
871	return $this->_sendCmd('PASS '.$pass);
872	}
873
874	return $this->_raiseError('Not In NET_POP3_STATE_AUTHORISATION State');
875	}
876
877
878	/**
879	* Sends the STAT command
880	*
881	* @return mixed Indexed array of number of messages and
882	* maildrop size, or false on error.
883	*/
884	function _cmdStat()
885	{
886	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
887	if (!Pear::isError($data = $this->_sendCmd('STAT'))) {
888	sscanf($data, '+OK %d %d', $msg_num, $size);
889	$this->_maildrop['num_msg'] = $msg_num;
890	$this->_maildrop['size'] = $size;
891
892	return [$msg_num, $size];
893	}
894	}
895
896	return false;
897	}
898
899
900	/**
901	* Sends the LIST command
902	*
903	* @param integer $msg_id Optional message number
904	*
905	* @return mixed Indexed array of msg_id/msg size or
906	* false on error
907	*/
908	function _cmdList($msg_id = null)
909	{
910	$return = [];
911	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
912	if (!isset($msg_id)) {
913	if (!Pear::isError($data = $this->_sendCmd('LIST'))) {
914	$data = $this->_getMultiline();
915	$data = explode("\r\n", $data);
916	foreach ($data as $line) {
917	if ($line != '') {
918	sscanf($line, '%s %s', $msg_id, $size);
919	$return[] = ['msg_id' => $msg_id, 'size' => $size];
920	}
921	}
922
923	return $return;
924	}
925	} else {
926	if (!Pear::isError($data = $this->_sendCmd('LIST '.$msg_id))) {
927	if ($data != '') {
928	sscanf($data, '+OK %d %d', $msg_id, $size);
929
930	return ['msg_id' => $msg_id, 'size' => $size];
931	}
932
933	return [];
934	}
935	}
936	}
937
938
939	return false;
940	}
941
942
943	/**
944	* Sends the RETR command
945	*
946	* @param integer $msg_id The message number to retrieve
947	*
948	* @return mixed The message or false on error
949	*/
950	function _cmdRetr($msg_id)
951	{
952	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
953	if (!Pear::isError($data = $this->_sendCmd('RETR '.$msg_id))) {
954	$data = $this->_getMultiline();
955
956	return $data;
957	}
958	}
959
960	return false;
961	}
962
963
964	/**
965	* Sends the DELE command
966	*
967	* @param integer $msg_id Message number to mark as deleted
968	*
969	* @return bool Success/Failure
970	*/
971	function _cmdDele($msg_id)
972	{
973	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
974	return $this->_sendCmd('DELE '.$msg_id);
975	}
976
977	return false;
978	}
979
980
981	/**
982	* Sends the NOOP command
983	*
984	* @return bool Success/Failure
985	*/
986	function _cmdNoop()
987	{
988	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
989	if (!Pear::isError($data = $this->_sendCmd('NOOP'))) {
990	return true;
991	}
992	}
993
994	return false;
995	}
996
997
998	/**
999	* Sends the RSET command
1000	*
1001	* @return bool Success/Failure
1002	*/
1003	function _cmdRset()
1004	{
1005	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
1006	if (!Pear::isError($data = $this->_sendCmd('RSET'))) {
1007	return true;
1008	}
1009	}
1010
1011	return false;
1012	}
1013
1014
1015	/**
1016	* Sends the QUIT command
1017	*
1018	* @return bool Success/Failure
1019	*/
1020	function _cmdQuit()
1021	{
1022	$data = $this->_sendCmd('QUIT');
1023	$this->_state = NET_POP3_STATE_DISCONNECTED;
1024	$this->_socket->disconnect();
1025
1026	return (bool)$data;
1027	}
1028
1029
1030	/**
1031	* Sends the TOP command
1032	*
1033	* @param integer $msg_id Message number
1034	* @param integer $num_lines Number of lines to retrieve
1035	*
1036	* @return mixed Message data or false on error
1037	*/
1038	function _cmdTop($msg_id, $num_lines)
1039	{
1040	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
1041
1042	if (!Pear::isError($data = $this->_sendCmd('TOP '.$msg_id.' '.$num_lines))) {
1043	return $this->_getMultiline();
1044	}
1045	}
1046
1047	return false;
1048	}
1049
1050
1051	/**
1052	* Sends the UIDL command
1053	*
1054	* @param integer $msg_id Message number
1055	*
1056	* @return mixed indexed array of msg_id/uidl or false on error
1057	*/
1058	function _cmdUidl($msg_id = null)
1059	{
1060	if ($this->_state == NET_POP3_STATE_TRANSACTION) {
1061
1062	if (!isset($msg_id)) {
1063	if (!Pear::isError($data = $this->_sendCmd('UIDL'))) {
1064	$data = $this->_getMultiline();
1065	$data = explode("\r\n", $data);
1066	foreach ($data as $line) {
1067	sscanf($line, '%d %s', $msg_id, $uidl);
1068	$return[] = ['msg_id' => $msg_id, 'uidl' => $uidl];
1069	}
1070
1071	return $return;
1072	}
1073	} else {
1074
1075	$data = $this->_sendCmd('UIDL '.$msg_id);
1076	sscanf($data, '+OK %d %s', $msg_id, $uidl);
1077
1078	return ['msg_id' => $msg_id, 'uidl' => $uidl];
1079	}
1080	}
1081
1082	return false;
1083	}
1084
1085
1086	/**
1087	* Sends a command, checks the reponse, and
1088	* if good returns the reponse, other wise
1089	* returns false.
1090	*
1091	* @param string $cmd Command to send (\r\n will be appended)
1092	*
1093	* @return mixed First line of response if successful, otherwise false
1094	*/
1095	function _sendCmd($cmd)
1096	{
1097	if (Pear::isError($result = $this->_send($cmd))) {
1098	return $result;
1099	}
1100
1101	if (Pear::isError($data = $this->_recvLn())) {
1102	return $data;
1103	}
1104
1105	if (strtoupper(substr($data, 0, 3)) == '+OK') {
1106	return $data;
1107	}
1108
1109
1110	return $this->_raiseError($data);
1111	}
1112
1113
1114	/**
1115	* Reads a multiline reponse and returns the data
1116	*
1117	* @return string The reponse.
1118	*/
1119	function _getMultiline()
1120	{
1121	$data = '';
1122	while (!Pear::isError($tmp = $this->_recvLn())) {
1123	if ($tmp == '.' \|\| $tmp == "\n.") {
1124	return substr($data, 0, -2);
1125	}
1126	if (substr($tmp, 0, 2) == '..') {
1127	$tmp = substr($tmp, 1);
1128	}
1129	$data .= $tmp."\r\n";
1130	}
1131
1132	return substr($data, 0, -2);
1133	}
1134
1135
1136	/**
1137	* Sets the bebug state
1138	*
1139	* @param bool $debug
1140	*
1141	* @access public
1142	* @return void
1143	*/
1144	function setDebug($debug = true)
1145	{
1146	$this->_debug = $debug;
1147	}
1148
1149
1150	/**
1151	* Send the given string of data to the server.
1152	*
1153	* @param string $data The string of data to send.
1154	*
1155	* @return mixed True on success or a Error object on failure.
1156	*
1157	* @access private
1158	* @since 1.0
1159	*/
1160	function _send($data)
1161	{
1162	if ($this->_debug) {
1163	echo "C: $data\n";
1164	}
1165
1166	if (Pear::isError($error = $this->_socket->writeLine($data))) {
1167	return $this->_raiseError('Failed to write to socket: '.$error->getMessage());
1168	}
1169
1170	return true;
1171	}
1172
1173
1174	/**
1175	* Receive the given string of data from the server.
1176	*
1177	* @return mixed a line of response on success or a Error object on failure.
1178	*
1179	* @access private
1180	* @since 1.0
1181	*/
1182	function _recvLn()
1183	{
1184	if (Pear::isError($lastline = $this->_socket->readLine(8192))) {
1185	return $this->_raiseError('Failed to read from socket: '.$this->lastline->getMessage());
1186	}
1187	if ($this->_debug) {
1188	// S: means this data was sent by the POP3 Server
1189	echo "S:$lastline\n";
1190	}
1191
1192	return $lastline;
1193	}
1194
1195
1196	/**
1197	* Checks de server Response
1198	*
1199	* @param string $response the response
1200	*
1201	* @return mixed true on success or a Error object on failure.
1202	*
1203	* @access private
1204	* @since 1.3.3
1205	*/
1206	function _checkResponse($response)
1207	{
1208	if (@substr(strtoupper($response), 0, 3) == '+OK') {
1209	return true;
1210	} else {
1211	if (@substr(strtoupper($response), 0, 4) == '-ERR') {
1212	return $this->_raiseError($response);
1213	} else {
1214	if (@substr(strtoupper($response), 0, 2) == '+ ') {
1215	return true;
1216	}
1217	}
1218	}
1219
1220	return $this->_raiseError("Unknown Response ($response)");
1221	}
1222
1223	}
1224
1225	?>
1226