Replacing tabs with spaces
[squirrelmail.git] / class / deliver / Deliver_SMTP.class.php
1 <?php
2 /**
3 * Deliver_SMTP.class.php
4 *
5 * Copyright (c) 1999-2005 The SquirrelMail Project Team
6 * Licensed under the GNU GPL. For full terms see the file COPYING.
7 *
8 * Delivery backend for the Deliver class.
9 *
10 * @version $Id$
11 * @package squirrelmail
12 */
13
14 /** This of course depends upon Deliver */
15 require_once(SM_PATH . 'class/deliver/Deliver.class.php');
16
17 /**
18 * Deliver messages using SMTP
19 * @package squirrelmail
20 */
21 class Deliver_SMTP extends Deliver {
22
23 function preWriteToStream(&$s) {
24 if ($s) {
25 if ($s{0} == '.') $s = '.' . $s;
26 $s = str_replace("\n.","\n..",$s);
27 }
28 }
29
30 function initStream($message, $domain, $length=0, $host='', $port='', $user='', $pass='', $authpop=false) {
31 global $use_smtp_tls,$smtp_auth_mech;
32
33 if ($authpop) {
34 $this->authPop($host, '', $user, $pass);
35 }
36
37 $rfc822_header = $message->rfc822_header;
38
39 $from = $rfc822_header->from[0];
40 $to = $rfc822_header->to;
41 $cc = $rfc822_header->cc;
42 $bcc = $rfc822_header->bcc;
43 $content_type = $rfc822_header->content_type;
44
45 // MAIL FROM: <from address> MUST be empty in cae of MDN (RFC2298)
46 if ($content_type->type0 == 'multipart' &&
47 $content_type->type1 == 'report' &&
48 isset($content_type->properties['report-type']) &&
49 $content_type->properties['report-type']=='disposition-notification') {
50 $from->host = '';
51 $from->mailbox = '';
52 }
53
54 if (($use_smtp_tls == true) and (check_php_version(4,3)) and (extension_loaded('openssl'))) {
55 $stream = fsockopen('tls://' . $host, $port, $errorNumber, $errorString);
56 } else {
57 $stream = fsockopen($host, $port, $errorNumber, $errorString);
58 }
59
60 if (!$stream) {
61 $this->dlv_msg = $errorString;
62 $this->dlv_ret_nr = $errorNumber;
63 return(0);
64 }
65 $tmp = fgets($stream, 1024);
66 if ($this->errorCheck($tmp, $stream)) {
67 return(0);
68 }
69
70 /*
71 * If $_SERVER['HTTP_HOST'] is set, use that in our HELO to the SMTP
72 * server. This should fix the DNS issues some people have had
73 */
74 if (sqgetGlobalVar('HTTP_HOST', $HTTP_HOST, SQ_SERVER)) { // HTTP_HOST is set
75 // optionally trim off port number
76 if($p = strrpos($HTTP_HOST, ':')) {
77 $HTTP_HOST = substr($HTTP_HOST, 0, $p);
78 }
79 $helohost = $HTTP_HOST;
80 } else { // For some reason, HTTP_HOST is not set - revert to old behavior
81 $helohost = $domain;
82 }
83
84 /* Lets introduce ourselves */
85 fputs($stream, "EHLO $helohost\r\n");
86 $tmp = fgets($stream,1024);
87 if ($this->errorCheck($tmp,$stream)) {
88 // fall back to HELO if EHLO is not supported
89 if ($this->dlv_ret_nr == '500') {
90 fputs($stream, "HELO $helohost\r\n");
91 $tmp = fgets($stream,1024);
92 if ($this->errorCheck($tmp,$stream)) {
93 return(0);
94 }
95 } else {
96 return(0);
97 }
98 }
99
100 if (( $smtp_auth_mech == 'cram-md5') or ( $smtp_auth_mech == 'digest-md5' )) {
101 // Doing some form of non-plain auth
102 if ($smtp_auth_mech == 'cram-md5') {
103 fputs($stream, "AUTH CRAM-MD5\r\n");
104 } elseif ($smtp_auth_mech == 'digest-md5') {
105 fputs($stream, "AUTH DIGEST-MD5\r\n");
106 }
107
108 $tmp = fgets($stream,1024);
109
110 if ($this->errorCheck($tmp,$stream)) {
111 return(0);
112 }
113
114 // At this point, $tmp should hold "334 <challenge string>"
115 $chall = substr($tmp,4);
116 // Depending on mechanism, generate response string
117 if ($smtp_auth_mech == 'cram-md5') {
118 $response = cram_md5_response($user,$pass,$chall);
119 } elseif ($smtp_auth_mech == 'digest-md5') {
120 $response = digest_md5_response($user,$pass,$chall,'smtp',$host);
121 }
122 fputs($stream, $response);
123
124 // Let's see what the server had to say about that
125 $tmp = fgets($stream,1024);
126 if ($this->errorCheck($tmp,$stream)) {
127 return(0);
128 }
129
130 // CRAM-MD5 is done at this point. If DIGEST-MD5, there's a bit more to go
131 if ($smtp_auth_mech == 'digest-md5') {
132 // $tmp contains rspauth, but I don't store that yet. (No need yet)
133 fputs($stream,"\r\n");
134 $tmp = fgets($stream,1024);
135
136 if ($this->errorCheck($tmp,$stream)) {
137 return(0);
138 }
139 }
140 // CRAM-MD5 and DIGEST-MD5 code ends here
141 } elseif ($smtp_auth_mech == 'none') {
142 // No auth at all, just send helo and then send the mail
143 // We already said hi earlier, nothing more is needed.
144 } elseif ($smtp_auth_mech == 'login') {
145 // The LOGIN method
146 fputs($stream, "AUTH LOGIN\r\n");
147 $tmp = fgets($stream, 1024);
148
149 if ($this->errorCheck($tmp, $stream)) {
150 return(0);
151 }
152 fputs($stream, base64_encode ($user) . "\r\n");
153 $tmp = fgets($stream, 1024);
154 if ($this->errorCheck($tmp, $stream)) {
155 return(0);
156 }
157
158 fputs($stream, base64_encode($pass) . "\r\n");
159 $tmp = fgets($stream, 1024);
160 if ($this->errorCheck($tmp, $stream)) {
161 return(0);
162 }
163 } elseif ($smtp_auth_mech == "plain") {
164 /* SASL Plain */
165 $auth = base64_encode("$user\0$user\0$pass");
166
167 $query = "AUTH PLAIN\r\n";
168 fputs($stream, $query);
169 $read=fgets($stream, 1024);
170
171 if (substr($read,0,3) == '334') { // OK so far..
172 fputs($stream, "$auth\r\n");
173 $read = fgets($stream, 1024);
174 }
175
176 $results=explode(" ",$read,3);
177 $response=$results[1];
178 $message=$results[2];
179 } else {
180 /* Right here, they've reached an unsupported auth mechanism.
181 This is the ugliest hack I've ever done, but it'll do till I can fix
182 things up better tomorrow. So tired... */
183 if ($this->errorCheck("535 Unable to use this auth type",$stream)) {
184 return(0);
185 }
186 }
187
188 /* Ok, who is sending the message? */
189 $fromaddress = ($from->mailbox && $from->host) ?
190 $from->mailbox.'@'.$from->host : '';
191 fputs($stream, 'MAIL FROM:<'.$fromaddress.">\r\n");
192 $tmp = fgets($stream, 1024);
193 if ($this->errorCheck($tmp, $stream)) {
194 return(0);
195 }
196
197 /* send who the recipients are */
198 for ($i = 0, $cnt = count($to); $i < $cnt; $i++) {
199 if (!$to[$i]->host) $to[$i]->host = $domain;
200 if ($to[$i]->mailbox) {
201 fputs($stream, 'RCPT TO:<'.$to[$i]->mailbox.'@'.$to[$i]->host.">\r\n");
202 $tmp = fgets($stream, 1024);
203 if ($this->errorCheck($tmp, $stream)) {
204 return(0);
205 }
206 }
207 }
208
209 for ($i = 0, $cnt = count($cc); $i < $cnt; $i++) {
210 if (!$cc[$i]->host) $cc[$i]->host = $domain;
211 if ($cc[$i]->mailbox) {
212 fputs($stream, 'RCPT TO:<'.$cc[$i]->mailbox.'@'.$cc[$i]->host.">\r\n");
213 $tmp = fgets($stream, 1024);
214 if ($this->errorCheck($tmp, $stream)) {
215 return(0);
216 }
217 }
218 }
219
220 for ($i = 0, $cnt = count($bcc); $i < $cnt; $i++) {
221 if (!$bcc[$i]->host) $bcc[$i]->host = $domain;
222 if ($bcc[$i]->mailbox) {
223 fputs($stream, 'RCPT TO:<'.$bcc[$i]->mailbox.'@'.$bcc[$i]->host.">\r\n");
224 $tmp = fgets($stream, 1024);
225 if ($this->errorCheck($tmp, $stream)) {
226 return(0);
227 }
228 }
229 }
230 /* Lets start sending the actual message */
231 fputs($stream, "DATA\r\n");
232 $tmp = fgets($stream, 1024);
233 if ($this->errorCheck($tmp, $stream)) {
234 return(0);
235 }
236 return $stream;
237 }
238
239 function finalizeStream($stream) {
240 fputs($stream, "\r\n.\r\n"); /* end the DATA part */
241 $tmp = fgets($stream, 1024);
242 $this->errorCheck($tmp, $stream);
243 if ($this->dlv_ret_nr != 250) {
244 return(0);
245 }
246 fputs($stream, "QUIT\r\n"); /* log off */
247 fclose($stream);
248 return true;
249 }
250
251 /* check if an SMTP reply is an error and set an error message) */
252 function errorCheck($line, $smtpConnection) {
253
254 $err_num = substr($line, 0, 3);
255 $this->dlv_ret_nr = $err_num;
256 $server_msg = substr($line, 4);
257
258 while(substr($line, 0, 4) == ($err_num.'-')) {
259 $line = fgets($smtpConnection, 1024);
260 $server_msg .= substr($line, 4);
261 }
262
263 if ( ((int) $err_num{0}) < 4) {
264 return false;
265 }
266
267 switch ($err_num) {
268 case '421': $message = _("Service not available, closing channel");
269 break;
270 case '432': $message = _("A password transition is needed");
271 break;
272 case '450': $message = _("Requested mail action not taken: mailbox unavailable");
273 break;
274 case '451': $message = _("Requested action aborted: error in processing");
275 break;
276 case '452': $message = _("Requested action not taken: insufficient system storage");
277 break;
278 case '454': $message = _("Temporary authentication failure");
279 break;
280 case '500': $message = _("Syntax error; command not recognized");
281 break;
282 case '501': $message = _("Syntax error in parameters or arguments");
283 break;
284 case '502': $message = _("Command not implemented");
285 break;
286 case '503': $message = _("Bad sequence of commands");
287 break;
288 case '504': $message = _("Command parameter not implemented");
289 break;
290 case '530': $message = _("Authentication required");
291 break;
292 case '534': $message = _("Authentication mechanism is too weak");
293 break;
294 case '535': $message = _("Authentication failed");
295 break;
296 case '538': $message = _("Encryption required for requested authentication mechanism");
297 break;
298 case '550': $message = _("Requested action not taken: mailbox unavailable");
299 break;
300 case '551': $message = _("User not local; please try forwarding");
301 break;
302 case '552': $message = _("Requested mail action aborted: exceeding storage allocation");
303 break;
304 case '553': $message = _("Requested action not taken: mailbox name not allowed");
305 break;
306 case '554': $message = _("Transaction failed");
307 break;
308 default: $message = _("Unknown response");
309 break;
310 }
311
312 $this->dlv_msg = $message;
313 $this->dlv_server_msg = nl2br(htmlspecialchars($server_msg));
314
315 return true;
316 }
317
318 function authPop($pop_server='', $pop_port='', $user, $pass) {
319 if (!$pop_port) {
320 $pop_port = 110;
321 }
322 if (!$pop_server) {
323 $pop_server = 'localhost';
324 }
325 $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
326 if (!$popConnection) {
327 error_log("Error connecting to POP Server ($pop_server:$pop_port)"
328 . " $err_no : $err_str");
329 } else {
330 $tmp = fgets($popConnection, 1024); /* banner */
331 if (substr($tmp, 0, 3) != '+OK') {
332 return(0);
333 }
334 fputs($popConnection, "USER $user\r\n");
335 $tmp = fgets($popConnection, 1024);
336 if (substr($tmp, 0, 3) != '+OK') {
337 return(0);
338 }
339 fputs($popConnection, 'PASS ' . $pass . "\r\n");
340 $tmp = fgets($popConnection, 1024);
341 if (substr($tmp, 0, 3) != '+OK') {
342 return(0);
343 }
344 fputs($popConnection, "QUIT\r\n"); /* log off */
345 fclose($popConnection);
346 }
347 }
348 }
349
350 ?>