/[docman]/auth_pop3.php
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Contents of /auth_pop3.php

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Revision 1.2 - (show annotations)
Fri Jan 26 12:39:57 2001 UTC (22 years ago) by dpavlin
Branch: MAIN
CVS Tags: v1_3
Changes since 1.1: +40 -487 lines
cleanup of pop3 autorization

1 <?
2
3 /*
4 Document manager auth_pop3.php module
5
6 WARNING: this modules uses e-mail address to check
7 login and password against pop3 server! e-mail must be
8 in following form:
9
10 login_on_pop3_server@pop3_server.domain
11
12 That should actually be also a vaild e-mail address
13
14
15 this module is based on class.POP3.php3 by cdi@thewebmasters.net
16 */
17
18 function auth_pop3($user) {
19 $email = explode("@",$user[3]);
20 $pop3 = new POP3();
21 $pop3->connect($email[1]);
22 if ($pop3->checklogin($email[0],$GLOBALS[PHP_AUTH_PW])) {
23 $pop3->quit();
24 return true;
25 }
26 $pop3->quit();
27 return false;
28 }
29
30 //--------------------------------------------------------------------------
31
32 /*
33 This is just a part of class.POP3.php3 which is needed for
34 auth_pop3.php module. Please look at original location for
35 whole class!
36
37 class.POP3.php3 v1.0 99/03/24 CDI cdi@thewebmasters.net
38 Copyright (c) 1999 - CDI (cdi@thewebmasters.net) All Rights Reserved
39
40 An RFC 1939 compliant wrapper class for the POP3 protocol.
41 */
42
43 class POP3
44 {
45 var $ERROR = ""; // Error string.
46
47 var $TIMEOUT = 60; // Default timeout before giving up on a
48 // network operation.
49
50 var $COUNT = -1; // Mailbox msg count
51
52 var $BUFFER = 512; // Socket buffer for socket fgets() calls.
53 // Per RFC 1939 the returned line a POP3
54 // server can send is 512 bytes.
55
56 var $FP = ""; // The connection to the server's
57 // file descriptor
58
59 var $MAILSERVER = ""; // Set this to hard code the server name
60
61 var $DEBUG = false;// set to true to echo pop3
62 // commands and responses to error_log
63 // this WILL log passwords!
64
65 var $BANNER = ""; // Holds the banner returned by the
66 // pop server - used for apop()
67
68 var $RFC1939 = true; // Set by noop(). See rfc1939.txt
69 //
70
71 var $ALLOWAPOP = false;// Allow or disallow apop()
72 // This must be set to true
73 // manually.
74
75 function POP3 ( $server = "", $timeout = "" )
76 {
77 settype($this->BUFFER,"integer");
78 if(!empty($server))
79 {
80 // Do not allow programs to alter MAILSERVER
81 // if it is already specified. They can get around
82 // this if they -really- want to, so don't count on it.
83 if(empty($this->MAILSERVER))
84 {
85 $this->MAILSERVER = $server;
86 }
87 }
88 if(!empty($timeout))
89 {
90 settype($timeout,"integer");
91 $this->TIMEOUT = $timeout;
92 set_time_limit($timeout);
93 }
94 return true;
95 }
96
97 function update_timer ()
98 {
99 set_time_limit($this->TIMEOUT);
100 return true;
101 }
102
103 function connect ($server, $port = 110)
104 {
105 // Opens a socket to the specified server. Unless overridden,
106 // port defaults to 110. Returns true on success, false on fail
107
108 // If MAILSERVER is set, override $server with it's value
109
110 if(!empty($this->MAILSERVER))
111 {
112 $server = $this->MAILSERVER;
113 }
114
115 if(empty($server))
116 {
117 $this->ERROR = "POP3 connect: No server specified";
118 unset($this->FP);
119 return false;
120 }
121
122 $fp = fsockopen("$server", $port, &$errno, &$errstr);
123
124 if(!$fp)
125 {
126 $this->ERROR = "POP3 connect: Error [$errno] [$errstr]";
127 unset($this->FP);
128 return false;
129 }
130
131 set_socket_blocking($fp,-1);
132 $this->update_timer();
133 $reply = fgets($fp,$this->BUFFER);
134 $reply = $this->strip_clf($reply);
135 if($this->DEBUG) { error_log("POP3 SEND [connect: $server] GOT [$reply]",0); }
136 if(!$this->is_ok($reply))
137 {
138 $this->ERROR = "POP3 connect: Error [$reply]";
139 unset($this->FP);
140 return false;
141 }
142 $this->FP = $fp;
143 $this->BANNER = $this->parse_banner($reply);
144 $this->RFC1939 = $this->noop();
145 if($this->RFC1939)
146 {
147 $this->ERROR = "POP3: premature NOOP OK, NOT an RFC 1939 Compliant server";
148 $this->quit();
149 return false;
150 }
151 return true;
152 }
153
154 //-----------------------------
155
156 function checklogin ($user, $pass) {
157 $reply = $this->send_cmd("USER $user");
158 if(!$this->is_ok($reply))
159 {
160 $this->ERROR = "POP3 user: Error [$reply]";
161 return false;
162 }
163
164 $reply = $this->send_cmd("PASS $pass");
165 if(!$this->is_ok($reply))
166 {
167 $this->ERROR = "POP3 pass: authentication failed [$reply]";
168 $this->quit();
169 return false;
170 }
171 // Auth successful.
172 return true;
173 }
174
175 //-------------------------------------------
176
177 function noop ()
178 {
179 if(!isset($this->FP))
180 {
181 $this->ERROR = "POP3 noop: No connection to server";
182 return false;
183 }
184 $cmd = "NOOP";
185 $reply = $this->send_cmd($cmd);
186 if(!$this->is_ok($reply))
187 {
188 return false;
189 }
190 return true;
191 }
192
193 function send_cmd ( $cmd = "" )
194 {
195 // Sends a user defined command string to the
196 // POP server and returns the results. Useful for
197 // non-compliant or custom POP servers.
198 // Do NOT include the \r\n as part of your command
199 // string - it will be appended automatically.
200
201 // The return value is a standard fgets() call, which
202 // will read up to $this->BUFFER bytes of data, until it
203 // encounters a new line, or EOF, whichever happens first.
204
205 // This method works best if $cmd responds with only
206 // one line of data.
207
208 if(!isset($this->FP))
209 {
210 $this->ERROR = "POP3 send_cmd: No connection to server";
211 return false;
212 }
213
214 if(empty($cmd))
215 {
216 $this->ERROR = "POP3 send_cmd: Empty command string";
217 return "";
218 }
219
220 $fp = $this->FP;
221 $buffer = $this->BUFFER;
222 $this->update_timer();
223 fwrite($fp,"$cmd\r\n");
224 $reply = fgets($fp,$buffer);
225 $reply = $this->strip_clf($reply);
226 if($this->DEBUG) { @error_log("POP3 SEND [$cmd] GOT [$reply]",0); }
227 return $reply;
228 }
229
230 function quit ()
231 {
232 // Closes the connection to the POP3 server, deleting
233 // any msgs marked as deleted.
234
235 if(!isset($this->FP))
236 {
237 $this->ERROR = "POP3 quit: connection does not exist";
238 return false;
239 }
240 $fp = $this->FP;
241 $cmd = "QUIT";
242 fwrite($fp,"$cmd\r\n");
243 $reply = fgets($fp,$this->BUFFER);
244 $reply = $this->strip_clf($reply);
245 if($this->DEBUG) { @error_log("POP3 SEND [$cmd] GOT [$reply]",0); }
246 fclose($fp);
247 unset($this->FP);
248 return true;
249 }
250
251 // *********************************************************
252
253 // The following methods are internal to the class.
254
255 function is_ok ($cmd = "")
256 {
257 // Return true or false on +OK or -ERR
258
259 if(empty($cmd)) { return false; }
260 if ( ereg ("^\+OK", $cmd ) ) { return true; }
261 return false;
262 }
263
264 function strip_clf ($text = "")
265 {
266 // Strips \r\n from server responses
267
268 if(empty($text)) { return $text; }
269 $stripped = ereg_replace("\r","",$text);
270 $stripped = ereg_replace("\n","",$stripped);
271 return $stripped;
272 }
273
274 function parse_banner ( $server_text )
275 {
276 $outside = true;
277 $banner = "";
278 $length = strlen($server_text);
279 for($count =0; $count < $length; $count++)
280 {
281 $digit = substr($server_text,$count,1);
282 if(!empty($digit))
283 {
284 if( (!$outside) and ($digit != '<') and ($digit != '>') )
285 {
286 $banner .= $digit;
287 }
288 if ($digit == '<')
289 {
290 $outside = false;
291 }
292 if($digit == '>')
293 {
294 $outside = true;
295 }
296 }
297 }
298 $banner = $this->strip_clf($banner); // Just in case
299 return "<$banner>";
300 }
301
302 } // End class
303
304 ?>

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