Mercurial > hg > nginx-mail
annotate src/mail/ngx_mail_pop3_handler.c @ 665:0b460e61bdcd default tip
Merge with nginx 1.0.0.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 25 Apr 2011 04:22:17 +0400 |
parents | 5938746e70c2 8246d8a2c2be |
children |
rev | line source |
---|---|
336 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 #include <ngx_event.h> | |
10 #include <ngx_mail.h> | |
11 #include <ngx_mail_pop3_module.h> | |
12 | |
13 | |
14 static ngx_int_t ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c); | |
15 static ngx_int_t ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c); | |
16 static ngx_int_t ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, | |
17 ngx_int_t stls); | |
18 static ngx_int_t ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c); | |
19 static ngx_int_t ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c); | |
20 static ngx_int_t ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c); | |
21 | |
22 | |
23 static u_char pop3_greeting[] = "+OK POP3 ready" CRLF; | |
24 static u_char pop3_ok[] = "+OK" CRLF; | |
25 static u_char pop3_next[] = "+ " CRLF; | |
26 static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; | |
27 static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; | |
28 static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; | |
29 | |
30 | |
31 void | |
32 ngx_mail_pop3_init_session(ngx_mail_session_t *s, ngx_connection_t *c) | |
33 { | |
34 u_char *p; | |
35 ngx_mail_core_srv_conf_t *cscf; | |
36 ngx_mail_pop3_srv_conf_t *pscf; | |
37 | |
38 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); | |
39 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
40 | |
41 if (pscf->auth_methods | |
42 & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) | |
43 { | |
44 if (ngx_mail_salt(s, c, cscf) != NGX_OK) { | |
45 ngx_mail_session_internal_server_error(s); | |
46 return; | |
47 } | |
48 | |
382 | 49 s->out.data = ngx_pnalloc(c->pool, sizeof(pop3_greeting) + s->salt.len); |
336 | 50 if (s->out.data == NULL) { |
51 ngx_mail_session_internal_server_error(s); | |
52 return; | |
53 } | |
54 | |
55 p = ngx_cpymem(s->out.data, pop3_greeting, sizeof(pop3_greeting) - 3); | |
56 *p++ = ' '; | |
57 p = ngx_cpymem(p, s->salt.data, s->salt.len); | |
58 | |
59 s->out.len = p - s->out.data; | |
60 | |
61 } else { | |
613 | 62 ngx_str_set(&s->out, pop3_greeting); |
336 | 63 } |
64 | |
65 c->read->handler = ngx_mail_pop3_init_protocol; | |
66 | |
67 ngx_add_timer(c->read, cscf->timeout); | |
68 | |
459 | 69 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
336 | 70 ngx_mail_close_connection(c); |
71 } | |
72 | |
73 ngx_mail_send(c->write); | |
74 } | |
75 | |
76 | |
77 void | |
78 ngx_mail_pop3_init_protocol(ngx_event_t *rev) | |
79 { | |
80 ngx_connection_t *c; | |
81 ngx_mail_session_t *s; | |
82 | |
83 c = rev->data; | |
84 | |
85 c->log->action = "in auth state"; | |
86 | |
87 if (rev->timedout) { | |
88 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
89 c->timedout = 1; | |
90 ngx_mail_close_connection(c); | |
91 return; | |
92 } | |
93 | |
94 s = c->data; | |
95 | |
96 if (s->buffer == NULL) { | |
97 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) | |
98 == NGX_ERROR) | |
99 { | |
100 ngx_mail_session_internal_server_error(s); | |
101 return; | |
102 } | |
103 | |
104 s->buffer = ngx_create_temp_buf(c->pool, 128); | |
105 if (s->buffer == NULL) { | |
106 ngx_mail_session_internal_server_error(s); | |
107 return; | |
108 } | |
109 } | |
110 | |
111 s->mail_state = ngx_pop3_start; | |
112 c->read->handler = ngx_mail_pop3_auth_state; | |
113 | |
114 ngx_mail_pop3_auth_state(rev); | |
115 } | |
116 | |
117 | |
118 void | |
119 ngx_mail_pop3_auth_state(ngx_event_t *rev) | |
120 { | |
121 ngx_int_t rc; | |
122 ngx_connection_t *c; | |
123 ngx_mail_session_t *s; | |
124 | |
125 c = rev->data; | |
126 s = c->data; | |
127 | |
128 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state"); | |
129 | |
130 if (rev->timedout) { | |
131 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
132 c->timedout = 1; | |
133 ngx_mail_close_connection(c); | |
134 return; | |
135 } | |
136 | |
137 if (s->out.len) { | |
138 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy"); | |
139 s->blocked = 1; | |
140 return; | |
141 } | |
142 | |
143 s->blocked = 0; | |
144 | |
145 rc = ngx_mail_read_command(s, c); | |
146 | |
147 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
148 return; | |
149 } | |
150 | |
613 | 151 ngx_str_set(&s->out, pop3_ok); |
336 | 152 |
153 if (rc == NGX_OK) { | |
154 switch (s->mail_state) { | |
155 | |
156 case ngx_pop3_start: | |
157 | |
158 switch (s->command) { | |
159 | |
160 case NGX_POP3_USER: | |
161 rc = ngx_mail_pop3_user(s, c); | |
162 break; | |
163 | |
164 case NGX_POP3_CAPA: | |
165 rc = ngx_mail_pop3_capa(s, c, 1); | |
166 break; | |
167 | |
168 case NGX_POP3_APOP: | |
169 rc = ngx_mail_pop3_apop(s, c); | |
170 break; | |
171 | |
172 case NGX_POP3_AUTH: | |
173 rc = ngx_mail_pop3_auth(s, c); | |
174 break; | |
175 | |
176 case NGX_POP3_QUIT: | |
177 s->quit = 1; | |
178 break; | |
179 | |
180 case NGX_POP3_NOOP: | |
181 break; | |
182 | |
183 case NGX_POP3_STLS: | |
184 rc = ngx_mail_pop3_stls(s, c); | |
185 break; | |
186 | |
187 default: | |
188 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
189 break; | |
190 } | |
191 | |
192 break; | |
193 | |
194 case ngx_pop3_user: | |
195 | |
196 switch (s->command) { | |
197 | |
198 case NGX_POP3_PASS: | |
199 rc = ngx_mail_pop3_pass(s, c); | |
200 break; | |
201 | |
202 case NGX_POP3_CAPA: | |
203 rc = ngx_mail_pop3_capa(s, c, 0); | |
204 break; | |
205 | |
206 case NGX_POP3_QUIT: | |
207 s->quit = 1; | |
208 break; | |
209 | |
210 case NGX_POP3_NOOP: | |
211 break; | |
212 | |
213 default: | |
214 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
215 break; | |
216 } | |
217 | |
218 break; | |
219 | |
220 /* suppress warinings */ | |
221 case ngx_pop3_passwd: | |
222 break; | |
223 | |
224 case ngx_pop3_auth_login_username: | |
468
2580fe1c5a9a
Mail: support for smtp auth login with username.
Maxim Dounin <mdounin@mdounin.ru>
parents:
459
diff
changeset
|
225 rc = ngx_mail_auth_login_username(s, c, 0); |
336 | 226 |
613 | 227 ngx_str_set(&s->out, pop3_password); |
336 | 228 s->mail_state = ngx_pop3_auth_login_password; |
229 break; | |
230 | |
231 case ngx_pop3_auth_login_password: | |
232 rc = ngx_mail_auth_login_password(s, c); | |
233 break; | |
234 | |
235 case ngx_pop3_auth_plain: | |
236 rc = ngx_mail_auth_plain(s, c, 0); | |
237 break; | |
238 | |
239 case ngx_pop3_auth_cram_md5: | |
240 rc = ngx_mail_auth_cram_md5(s, c); | |
241 break; | |
242 } | |
243 } | |
244 | |
245 switch (rc) { | |
246 | |
247 case NGX_DONE: | |
248 ngx_mail_auth(s, c); | |
249 return; | |
250 | |
251 case NGX_ERROR: | |
252 ngx_mail_session_internal_server_error(s); | |
253 return; | |
254 | |
255 case NGX_MAIL_PARSE_INVALID_COMMAND: | |
256 s->mail_state = ngx_pop3_start; | |
257 s->state = 0; | |
258 | |
613 | 259 ngx_str_set(&s->out, pop3_invalid_command); |
336 | 260 |
261 /* fall through */ | |
262 | |
263 case NGX_OK: | |
264 | |
265 s->args.nelts = 0; | |
266 s->buffer->pos = s->buffer->start; | |
267 s->buffer->last = s->buffer->start; | |
268 | |
269 if (s->state) { | |
270 s->arg_start = s->buffer->start; | |
271 } | |
272 | |
273 ngx_mail_send(c->write); | |
274 } | |
275 } | |
276 | |
277 static ngx_int_t | |
278 ngx_mail_pop3_user(ngx_mail_session_t *s, ngx_connection_t *c) | |
279 { | |
356 | 280 ngx_str_t *arg; |
336 | 281 |
282 #if (NGX_MAIL_SSL) | |
283 if (ngx_mail_starttls_only(s, c)) { | |
284 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
285 } | |
286 #endif | |
287 | |
288 if (s->args.nelts != 1) { | |
289 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
290 } | |
291 | |
292 arg = s->args.elts; | |
293 s->login.len = arg[0].len; | |
382 | 294 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
336 | 295 if (s->login.data == NULL) { |
296 return NGX_ERROR; | |
297 } | |
298 | |
299 ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
300 | |
301 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
302 "pop3 login: \"%V\"", &s->login); | |
303 | |
304 s->mail_state = ngx_pop3_user; | |
305 | |
306 return NGX_OK; | |
307 } | |
308 | |
309 | |
310 static ngx_int_t | |
311 ngx_mail_pop3_pass(ngx_mail_session_t *s, ngx_connection_t *c) | |
312 { | |
313 ngx_str_t *arg; | |
314 | |
315 if (s->args.nelts != 1) { | |
316 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
317 } | |
318 | |
319 arg = s->args.elts; | |
320 s->passwd.len = arg[0].len; | |
382 | 321 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
336 | 322 if (s->passwd.data == NULL) { |
323 return NGX_ERROR; | |
324 } | |
325 | |
326 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); | |
327 | |
328 #if (NGX_DEBUG_MAIL_PASSWD) | |
329 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
330 "pop3 passwd: \"%V\"", &s->passwd); | |
331 #endif | |
332 | |
333 return NGX_DONE; | |
334 } | |
335 | |
336 | |
337 static ngx_int_t | |
338 ngx_mail_pop3_capa(ngx_mail_session_t *s, ngx_connection_t *c, ngx_int_t stls) | |
339 { | |
340 ngx_mail_pop3_srv_conf_t *pscf; | |
341 | |
342 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); | |
343 | |
344 #if (NGX_MAIL_SSL) | |
345 | |
346 if (stls && c->ssl == NULL) { | |
356 | 347 ngx_mail_ssl_conf_t *sslcf; |
348 | |
336 | 349 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
350 | |
351 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { | |
352 s->out = pscf->starttls_capability; | |
353 return NGX_OK; | |
354 } | |
355 | |
356 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
357 s->out = pscf->starttls_only_capability; | |
358 return NGX_OK; | |
359 } | |
360 } | |
361 | |
362 #endif | |
363 | |
364 s->out = pscf->capability; | |
365 return NGX_OK; | |
366 } | |
367 | |
368 | |
369 static ngx_int_t | |
370 ngx_mail_pop3_stls(ngx_mail_session_t *s, ngx_connection_t *c) | |
371 { | |
372 #if (NGX_MAIL_SSL) | |
373 ngx_mail_ssl_conf_t *sslcf; | |
374 | |
375 if (c->ssl == NULL) { | |
376 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
377 if (sslcf->starttls) { | |
378 c->read->handler = ngx_mail_starttls_handler; | |
379 return NGX_OK; | |
380 } | |
381 } | |
382 | |
383 #endif | |
384 | |
385 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
386 } | |
387 | |
388 | |
389 static ngx_int_t | |
390 ngx_mail_pop3_apop(ngx_mail_session_t *s, ngx_connection_t *c) | |
391 { | |
392 ngx_str_t *arg; | |
393 ngx_mail_pop3_srv_conf_t *pscf; | |
394 | |
395 #if (NGX_MAIL_SSL) | |
396 if (ngx_mail_starttls_only(s, c)) { | |
397 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
398 } | |
399 #endif | |
400 | |
401 if (s->args.nelts != 2) { | |
402 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
403 } | |
404 | |
405 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); | |
406 | |
407 if (!(pscf->auth_methods & NGX_MAIL_AUTH_APOP_ENABLED)) { | |
408 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
409 } | |
410 | |
411 arg = s->args.elts; | |
412 | |
413 s->login.len = arg[0].len; | |
382 | 414 s->login.data = ngx_pnalloc(c->pool, s->login.len); |
336 | 415 if (s->login.data == NULL) { |
416 return NGX_ERROR; | |
417 } | |
418 | |
419 ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
420 | |
421 s->passwd.len = arg[1].len; | |
382 | 422 s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); |
336 | 423 if (s->passwd.data == NULL) { |
424 return NGX_ERROR; | |
425 } | |
426 | |
427 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); | |
428 | |
429 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
430 "pop3 apop: \"%V\" \"%V\"", &s->login, &s->passwd); | |
431 | |
432 s->auth_method = NGX_MAIL_AUTH_APOP; | |
433 | |
434 return NGX_DONE; | |
435 } | |
436 | |
437 | |
438 static ngx_int_t | |
439 ngx_mail_pop3_auth(ngx_mail_session_t *s, ngx_connection_t *c) | |
440 { | |
441 ngx_int_t rc; | |
442 ngx_mail_pop3_srv_conf_t *pscf; | |
443 | |
444 #if (NGX_MAIL_SSL) | |
445 if (ngx_mail_starttls_only(s, c)) { | |
446 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
447 } | |
448 #endif | |
449 | |
450 pscf = ngx_mail_get_module_srv_conf(s, ngx_mail_pop3_module); | |
451 | |
452 if (s->args.nelts == 0) { | |
453 s->out = pscf->auth_capability; | |
454 s->state = 0; | |
455 | |
456 return NGX_OK; | |
457 } | |
458 | |
571
5938746e70c2
Mail: get rid of ugly protocol check in ngx_mail_auth_parse().
Maxim Dounin <mdounin@mdounin.ru>
parents:
468
diff
changeset
|
459 rc = ngx_mail_auth_parse(s, c, 0); |
336 | 460 |
461 switch (rc) { | |
462 | |
463 case NGX_MAIL_AUTH_LOGIN: | |
464 | |
613 | 465 ngx_str_set(&s->out, pop3_username); |
336 | 466 s->mail_state = ngx_pop3_auth_login_username; |
467 | |
468 return NGX_OK; | |
469 | |
468
2580fe1c5a9a
Mail: support for smtp auth login with username.
Maxim Dounin <mdounin@mdounin.ru>
parents:
459
diff
changeset
|
470 case NGX_MAIL_AUTH_LOGIN_USERNAME: |
2580fe1c5a9a
Mail: support for smtp auth login with username.
Maxim Dounin <mdounin@mdounin.ru>
parents:
459
diff
changeset
|
471 |
613 | 472 ngx_str_set(&s->out, pop3_password); |
468
2580fe1c5a9a
Mail: support for smtp auth login with username.
Maxim Dounin <mdounin@mdounin.ru>
parents:
459
diff
changeset
|
473 s->mail_state = ngx_pop3_auth_login_password; |
2580fe1c5a9a
Mail: support for smtp auth login with username.
Maxim Dounin <mdounin@mdounin.ru>
parents:
459
diff
changeset
|
474 |
2580fe1c5a9a
Mail: support for smtp auth login with username.
Maxim Dounin <mdounin@mdounin.ru>
parents:
459
diff
changeset
|
475 return ngx_mail_auth_login_username(s, c, 1); |
2580fe1c5a9a
Mail: support for smtp auth login with username.
Maxim Dounin <mdounin@mdounin.ru>
parents:
459
diff
changeset
|
476 |
336 | 477 case NGX_MAIL_AUTH_PLAIN: |
478 | |
613 | 479 ngx_str_set(&s->out, pop3_next); |
336 | 480 s->mail_state = ngx_pop3_auth_plain; |
481 | |
482 return NGX_OK; | |
483 | |
484 case NGX_MAIL_AUTH_CRAM_MD5: | |
485 | |
486 if (!(pscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { | |
487 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
488 } | |
489 | |
490 if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { | |
491 s->mail_state = ngx_pop3_auth_cram_md5; | |
492 return NGX_OK; | |
493 } | |
494 | |
495 return NGX_ERROR; | |
496 } | |
497 | |
498 return rc; | |
499 } |