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comparison src/mail/ngx_mail_auth_http_module.c @ 290:f745bf973510 NGINX_0_5_15

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nginx 0.5.15 *) Feature: the mail proxy supports authenticated SMTP proxying and the "smtp_auth", "smtp_capablities", and "xclient" directives. Thanks to Anton Yuzhaninov and Maxim Dounin. *) Feature: now the keep-alive connections are closed just after receiving the reconfiguration signal. *) Change: the "imap" and "auth" directives were renamed to the "mail" and "pop3_auth" directives. *) Bugfix: a segmentation fault occurred in worker process if the CRAM-MD5 authentication method was used and the APOP method was disabled. *) Bugfix: if the "starttls only" directive was used in POP3 protocol, then nginx allowed authentication without switching to the SSL mode. *) Bugfix: worker processes did not exit after reconfiguration and did not rotate logs if the eventport method was used. *) Bugfix: a worker process may got caught in an endless loop, if the "ip_hash" directive was used. *) Bugfix: now nginx does not log some alerts if eventport or /dev/poll methods are used.
author Igor Sysoev <http://sysoev.ru>
date Mon, 19 Mar 2007 00:00:00 +0300
parents
children 2ceaee987f37
comparison
equal deleted inserted replaced
289:a9323c9433a7 290:f745bf973510
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_event_connect.h>
11 #include <ngx_mail.h>
12
13
14 typedef struct {
15 ngx_peer_addr_t *peer;
16
17 ngx_msec_t timeout;
18
19 ngx_str_t host_header;
20 ngx_str_t uri;
21 ngx_str_t header;
22
23 ngx_array_t *headers;
24 } ngx_mail_auth_http_conf_t;
25
26
27 typedef struct ngx_mail_auth_http_ctx_s ngx_mail_auth_http_ctx_t;
28
29 typedef void (*ngx_mail_auth_http_handler_pt)(ngx_mail_session_t *s,
30 ngx_mail_auth_http_ctx_t *ctx);
31
32 struct ngx_mail_auth_http_ctx_s {
33 ngx_buf_t *request;
34 ngx_buf_t *response;
35 ngx_peer_connection_t peer;
36
37 ngx_mail_auth_http_handler_pt handler;
38
39 ngx_uint_t state;
40 ngx_uint_t hash; /* no needed ? */
41
42 u_char *header_name_start;
43 u_char *header_name_end;
44 u_char *header_start;
45 u_char *header_end;
46
47 ngx_str_t addr;
48 ngx_str_t port;
49 ngx_str_t err;
50 ngx_str_t errmsg;
51 ngx_str_t errcode;
52
53 time_t sleep;
54
55 ngx_pool_t *pool;
56 };
57
58
59 static void ngx_mail_auth_http_write_handler(ngx_event_t *wev);
60 static void ngx_mail_auth_http_read_handler(ngx_event_t *rev);
61 static void ngx_mail_auth_http_ignore_status_line(ngx_mail_session_t *s,
62 ngx_mail_auth_http_ctx_t *ctx);
63 static void ngx_mail_auth_http_process_headers(ngx_mail_session_t *s,
64 ngx_mail_auth_http_ctx_t *ctx);
65 static void ngx_mail_auth_sleep_handler(ngx_event_t *rev);
66 static ngx_int_t ngx_mail_auth_http_parse_header_line(ngx_mail_session_t *s,
67 ngx_mail_auth_http_ctx_t *ctx);
68 static void ngx_mail_auth_http_block_read(ngx_event_t *rev);
69 static void ngx_mail_auth_http_dummy_handler(ngx_event_t *ev);
70 static ngx_buf_t *ngx_mail_auth_http_create_request(ngx_mail_session_t *s,
71 ngx_pool_t *pool, ngx_mail_auth_http_conf_t *ahcf);
72 static ngx_int_t ngx_mail_auth_http_escape(ngx_pool_t *pool, ngx_str_t *text,
73 ngx_str_t *escaped);
74
75 static void *ngx_mail_auth_http_create_conf(ngx_conf_t *cf);
76 static char *ngx_mail_auth_http_merge_conf(ngx_conf_t *cf, void *parent,
77 void *child);
78 static char *ngx_mail_auth_http(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
79 static char *ngx_mail_auth_http_header(ngx_conf_t *cf, ngx_command_t *cmd,
80 void *conf);
81
82
83 static ngx_command_t ngx_mail_auth_http_commands[] = {
84
85 { ngx_string("auth_http"),
86 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
87 ngx_mail_auth_http,
88 NGX_MAIL_SRV_CONF_OFFSET,
89 0,
90 NULL },
91
92 { ngx_string("auth_http_timeout"),
93 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
94 ngx_conf_set_msec_slot,
95 NGX_MAIL_SRV_CONF_OFFSET,
96 offsetof(ngx_mail_auth_http_conf_t, timeout),
97 NULL },
98
99 { ngx_string("auth_http_header"),
100 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE2,
101 ngx_mail_auth_http_header,
102 NGX_MAIL_SRV_CONF_OFFSET,
103 0,
104 NULL },
105
106 ngx_null_command
107 };
108
109
110 static ngx_mail_module_t ngx_mail_auth_http_module_ctx = {
111 NULL, /* create main configuration */
112 NULL, /* init main configuration */
113
114 ngx_mail_auth_http_create_conf, /* create server configuration */
115 ngx_mail_auth_http_merge_conf /* merge server configuration */
116 };
117
118
119 ngx_module_t ngx_mail_auth_http_module = {
120 NGX_MODULE_V1,
121 &ngx_mail_auth_http_module_ctx, /* module context */
122 ngx_mail_auth_http_commands, /* module directives */
123 NGX_MAIL_MODULE, /* module type */
124 NULL, /* init master */
125 NULL, /* init module */
126 NULL, /* init process */
127 NULL, /* init thread */
128 NULL, /* exit thread */
129 NULL, /* exit process */
130 NULL, /* exit master */
131 NGX_MODULE_V1_PADDING
132 };
133
134
135 static char *ngx_mail_auth_http_protocol[] = { "pop3", "imap", "smtp" };
136 static ngx_str_t ngx_mail_auth_http_method[] = {
137 ngx_string("plain"),
138 ngx_string("plain"),
139 ngx_string("apop"),
140 ngx_string("cram-md5")
141 };
142
143 static ngx_str_t ngx_mail_smtp_errcode = ngx_string("535 5.7.0");
144
145 void
146 ngx_mail_auth_http_init(ngx_mail_session_t *s)
147 {
148 ngx_int_t rc;
149 ngx_pool_t *pool;
150 ngx_mail_auth_http_ctx_t *ctx;
151 ngx_mail_auth_http_conf_t *ahcf;
152
153 s->connection->log->action = "in http auth state";
154
155 pool = ngx_create_pool(2048, s->connection->log);
156 if (pool == NULL) {
157 ngx_mail_session_internal_server_error(s);
158 return;
159 }
160
161 ctx = ngx_pcalloc(pool, sizeof(ngx_mail_auth_http_ctx_t));
162 if (ctx == NULL) {
163 ngx_destroy_pool(pool);
164 ngx_mail_session_internal_server_error(s);
165 return;
166 }
167
168 ctx->pool = pool;
169
170 ahcf = ngx_mail_get_module_srv_conf(s, ngx_mail_auth_http_module);
171
172 ctx->request = ngx_mail_auth_http_create_request(s, pool, ahcf);
173 if (ctx->request == NULL) {
174 ngx_destroy_pool(ctx->pool);
175 ngx_mail_session_internal_server_error(s);
176 return;
177 }
178
179 ngx_mail_set_ctx(s, ctx, ngx_mail_auth_http_module);
180
181 ctx->peer.sockaddr = ahcf->peer->sockaddr;
182 ctx->peer.socklen = ahcf->peer->socklen;
183 ctx->peer.name = &ahcf->peer->name;
184 ctx->peer.get = ngx_event_get_peer;
185 ctx->peer.log = s->connection->log;
186 ctx->peer.log_error = NGX_ERROR_ERR;
187
188 rc = ngx_event_connect_peer(&ctx->peer);
189
190 if (rc == NGX_ERROR || rc == NGX_BUSY || rc == NGX_DECLINED) {
191 if (ctx->peer.connection) {
192 ngx_close_connection(ctx->peer.connection);
193 }
194
195 ngx_destroy_pool(ctx->pool);
196 ngx_mail_session_internal_server_error(s);
197 return;
198 }
199
200 ctx->peer.connection->data = s;
201 ctx->peer.connection->pool = s->connection->pool;
202
203 s->connection->read->handler = ngx_mail_auth_http_block_read;
204 ctx->peer.connection->read->handler = ngx_mail_auth_http_read_handler;
205 ctx->peer.connection->write->handler = ngx_mail_auth_http_write_handler;
206
207 ctx->handler = ngx_mail_auth_http_ignore_status_line;
208
209 ngx_add_timer(ctx->peer.connection->read, ahcf->timeout);
210 ngx_add_timer(ctx->peer.connection->write, ahcf->timeout);
211
212 if (rc == NGX_OK) {
213 ngx_mail_auth_http_write_handler(ctx->peer.connection->write);
214 return;
215 }
216 }
217
218
219 static void
220 ngx_mail_auth_http_write_handler(ngx_event_t *wev)
221 {
222 ssize_t n, size;
223 ngx_connection_t *c;
224 ngx_mail_session_t *s;
225 ngx_mail_auth_http_ctx_t *ctx;
226 ngx_mail_auth_http_conf_t *ahcf;
227
228 c = wev->data;
229 s = c->data;
230
231 ctx = ngx_mail_get_module_ctx(s, ngx_mail_auth_http_module);
232
233 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, wev->log, 0,
234 "mail auth http write handler");
235
236 if (wev->timedout) {
237 ngx_log_error(NGX_LOG_ERR, wev->log, NGX_ETIMEDOUT,
238 "auth http server %V timed out", ctx->peer.name);
239 ngx_close_connection(ctx->peer.connection);
240 ngx_destroy_pool(ctx->pool);
241 ngx_mail_session_internal_server_error(s);
242 return;
243 }
244
245 size = ctx->request->last - ctx->request->pos;
246
247 n = ngx_send(c, ctx->request->pos, size);
248
249 if (n == NGX_ERROR) {
250 ngx_close_connection(ctx->peer.connection);
251 ngx_destroy_pool(ctx->pool);
252 ngx_mail_session_internal_server_error(s);
253 return;
254 }
255
256 if (n > 0) {
257 ctx->request->pos += n;
258
259 if (n == size) {
260 wev->handler = ngx_mail_auth_http_dummy_handler;
261
262 if (wev->timer_set) {
263 ngx_del_timer(wev);
264 }
265
266 if (ngx_handle_write_event(wev, 0) == NGX_ERROR) {
267 ngx_close_connection(ctx->peer.connection);
268 ngx_destroy_pool(ctx->pool);
269 ngx_mail_session_internal_server_error(s);
270 }
271
272 return;
273 }
274 }
275
276 if (!wev->timer_set) {
277 ahcf = ngx_mail_get_module_srv_conf(s, ngx_mail_auth_http_module);
278 ngx_add_timer(wev, ahcf->timeout);
279 }
280 }
281
282
283 static void
284 ngx_mail_auth_http_read_handler(ngx_event_t *rev)
285 {
286 ssize_t n, size;
287 ngx_connection_t *c;
288 ngx_mail_session_t *s;
289 ngx_mail_auth_http_ctx_t *ctx;
290
291 c = rev->data;
292 s = c->data;
293
294 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
295 "mail auth http read handler");
296
297 ctx = ngx_mail_get_module_ctx(s, ngx_mail_auth_http_module);
298
299 if (rev->timedout) {
300 ngx_log_error(NGX_LOG_ERR, rev->log, NGX_ETIMEDOUT,
301 "auth http server %V timed out", ctx->peer.name);
302 ngx_close_connection(ctx->peer.connection);
303 ngx_destroy_pool(ctx->pool);
304 ngx_mail_session_internal_server_error(s);
305 return;
306 }
307
308 if (ctx->response == NULL) {
309 ctx->response = ngx_create_temp_buf(ctx->pool, 1024);
310 if (ctx->response == NULL) {
311 ngx_close_connection(ctx->peer.connection);
312 ngx_destroy_pool(ctx->pool);
313 ngx_mail_session_internal_server_error(s);
314 return;
315 }
316 }
317
318 size = ctx->response->end - ctx->response->last;
319
320 n = ngx_recv(c, ctx->response->pos, size);
321
322 if (n > 0) {
323 ctx->response->last += n;
324
325 ctx->handler(s, ctx);
326 return;
327 }
328
329 if (n == NGX_AGAIN) {
330 return;
331 }
332
333 ngx_close_connection(ctx->peer.connection);
334 ngx_destroy_pool(ctx->pool);
335 ngx_mail_session_internal_server_error(s);
336 }
337
338
339 static void
340 ngx_mail_auth_http_ignore_status_line(ngx_mail_session_t *s,
341 ngx_mail_auth_http_ctx_t *ctx)
342 {
343 u_char *p, ch;
344 enum {
345 sw_start = 0,
346 sw_H,
347 sw_HT,
348 sw_HTT,
349 sw_HTTP,
350 sw_skip,
351 sw_almost_done
352 } state;
353
354 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
355 "mail auth http process status line");
356
357 state = ctx->state;
358
359 for (p = ctx->response->pos; p < ctx->response->last; p++) {
360 ch = *p;
361
362 switch (state) {
363
364 /* "HTTP/" */
365 case sw_start:
366 if (ch == 'H') {
367 state = sw_H;
368 break;
369 }
370 goto next;
371
372 case sw_H:
373 if (ch == 'T') {
374 state = sw_HT;
375 break;
376 }
377 goto next;
378
379 case sw_HT:
380 if (ch == 'T') {
381 state = sw_HTT;
382 break;
383 }
384 goto next;
385
386 case sw_HTT:
387 if (ch == 'P') {
388 state = sw_HTTP;
389 break;
390 }
391 goto next;
392
393 case sw_HTTP:
394 if (ch == '/') {
395 state = sw_skip;
396 break;
397 }
398 goto next;
399
400 /* any text until end of line */
401 case sw_skip:
402 switch (ch) {
403 case CR:
404 state = sw_almost_done;
405
406 break;
407 case LF:
408 goto done;
409 }
410 break;
411
412 /* end of status line */
413 case sw_almost_done:
414 if (ch == LF) {
415 goto done;
416 }
417
418 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
419 "auth http server &V sent invalid response",
420 ctx->peer.name);
421 ngx_close_connection(ctx->peer.connection);
422 ngx_destroy_pool(ctx->pool);
423 ngx_mail_session_internal_server_error(s);
424 return;
425 }
426 }
427
428 ctx->response->pos = p;
429 ctx->state = state;
430
431 return;
432
433 next:
434
435 p = ctx->response->start - 1;
436
437 done:
438
439 ctx->response->pos = p + 1;
440 ctx->state = 0;
441 ctx->handler = ngx_mail_auth_http_process_headers;
442 ctx->handler(s, ctx);
443 }
444
445
446 static void
447 ngx_mail_auth_http_process_headers(ngx_mail_session_t *s,
448 ngx_mail_auth_http_ctx_t *ctx)
449 {
450 u_char *p;
451 time_t timer;
452 size_t len, size;
453 ngx_int_t rc, port, n;
454 ngx_peer_addr_t *peer;
455 struct sockaddr_in *sin;
456
457 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
458 "mail auth http process headers");
459
460 for ( ;; ) {
461 rc = ngx_mail_auth_http_parse_header_line(s, ctx);
462
463 if (rc == NGX_OK) {
464
465 #if (NGX_DEBUG)
466 {
467 ngx_str_t key, value;
468
469 key.len = ctx->header_name_end - ctx->header_name_start;
470 key.data = ctx->header_name_start;
471 value.len = ctx->header_end - ctx->header_start;
472 value.data = ctx->header_start;
473
474 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
475 "mail auth http header: \"%V: %V\"",
476 &key, &value);
477 }
478 #endif
479
480 len = ctx->header_name_end - ctx->header_name_start;
481
482 if (len == sizeof("Auth-Status") - 1
483 && ngx_strncasecmp(ctx->header_name_start,
484 (u_char *) "Auth-Status",
485 sizeof("Auth-Status") - 1)
486 == 0)
487 {
488 len = ctx->header_end - ctx->header_start;
489
490 if (len == 2
491 && ctx->header_start[0] == 'O'
492 && ctx->header_start[1] == 'K')
493 {
494 continue;
495 }
496
497 if (len == 4
498 && ctx->header_start[0] == 'W'
499 && ctx->header_start[1] == 'A'
500 && ctx->header_start[2] == 'I'
501 && ctx->header_start[3] == 'T')
502 {
503 s->auth_wait = 1;
504 continue;
505 }
506
507 ctx->errmsg.len = len;
508 ctx->errmsg.data = ctx->header_start;
509
510 switch (s->protocol) {
511
512 case NGX_MAIL_POP3_PROTOCOL:
513 size = sizeof("-ERR ") - 1 + len + sizeof(CRLF) - 1;
514 break;
515
516 case NGX_MAIL_IMAP_PROTOCOL:
517 size = s->tag.len + sizeof("NO ") - 1 + len
518 + sizeof(CRLF) - 1;
519 break;
520
521 default: /* NGX_MAIL_SMTP_PROTOCOL */
522 ctx->err = ctx->errmsg;
523 continue;
524 }
525
526 p = ngx_pcalloc(s->connection->pool, size);
527 if (p == NULL) {
528 ngx_close_connection(ctx->peer.connection);
529 ngx_destroy_pool(ctx->pool);
530 ngx_mail_session_internal_server_error(s);
531 return;
532 }
533
534 ctx->err.data = p;
535
536 switch (s->protocol) {
537
538 case NGX_MAIL_POP3_PROTOCOL:
539 *p++ = '-'; *p++ = 'E'; *p++ = 'R'; *p++ = 'R'; *p++ = ' ';
540 break;
541
542 case NGX_MAIL_IMAP_PROTOCOL:
543 p = ngx_cpymem(p, s->tag.data, s->tag.len);
544 *p++ = 'N'; *p++ = 'O'; *p++ = ' ';
545 break;
546
547 default: /* NGX_MAIL_SMTP_PROTOCOL */
548 break;
549 }
550
551 p = ngx_cpymem(p, ctx->header_start, len);
552 *p++ = CR; *p++ = LF;
553
554 ctx->err.len = p - ctx->err.data;
555
556 continue;
557 }
558
559 if (len == sizeof("Auth-Server") - 1
560 && ngx_strncasecmp(ctx->header_name_start,
561 (u_char *) "Auth-Server",
562 sizeof("Auth-Server") - 1)
563 == 0)
564 {
565 ctx->addr.len = ctx->header_end - ctx->header_start;
566 ctx->addr.data = ctx->header_start;
567
568 continue;
569 }
570
571 if (len == sizeof("Auth-Port") - 1
572 && ngx_strncasecmp(ctx->header_name_start,
573 (u_char *) "Auth-Port",
574 sizeof("Auth-Port") - 1)
575 == 0)
576 {
577 ctx->port.len = ctx->header_end - ctx->header_start;
578 ctx->port.data = ctx->header_start;
579
580 continue;
581 }
582
583 if (len == sizeof("Auth-User") - 1
584 && ngx_strncasecmp(ctx->header_name_start,
585 (u_char *) "Auth-User",
586 sizeof("Auth-User") - 1)
587 == 0)
588 {
589 s->login.len = ctx->header_end - ctx->header_start;
590
591 s->login.data = ngx_palloc(s->connection->pool, s->login.len);
592 if (s->login.data == NULL) {
593 ngx_close_connection(ctx->peer.connection);
594 ngx_destroy_pool(ctx->pool);
595 ngx_mail_session_internal_server_error(s);
596 return;
597 }
598
599 ngx_memcpy(s->login.data, ctx->header_start, s->login.len);
600
601 continue;
602 }
603
604 if (len == sizeof("Auth-Pass") - 1
605 && ngx_strncasecmp(ctx->header_name_start,
606 (u_char *) "Auth-Pass",
607 sizeof("Auth-Pass") - 1)
608 == 0)
609 {
610 s->passwd.len = ctx->header_end - ctx->header_start;
611
612 s->passwd.data = ngx_palloc(s->connection->pool, s->passwd.len);
613 if (s->passwd.data == NULL) {
614 ngx_close_connection(ctx->peer.connection);
615 ngx_destroy_pool(ctx->pool);
616 ngx_mail_session_internal_server_error(s);
617 return;
618 }
619
620 ngx_memcpy(s->passwd.data, ctx->header_start, s->passwd.len);
621
622 continue;
623 }
624
625 if (len == sizeof("Auth-Wait") - 1
626 && ngx_strncasecmp(ctx->header_name_start,
627 (u_char *) "Auth-Wait",
628 sizeof("Auth-Wait") - 1)
629 == 0)
630 {
631 n = ngx_atoi(ctx->header_start,
632 ctx->header_end - ctx->header_start);
633
634 if (n != NGX_ERROR) {
635 ctx->sleep = n;
636 }
637
638 continue;
639 }
640
641 if (len == sizeof("Auth-Error-Code") - 1
642 && ngx_strncasecmp(ctx->header_name_start,
643 (u_char *) "Auth-Error-Code",
644 sizeof("Auth-Error-Code") - 1)
645 == 0)
646 {
647 ctx->errcode.len = ctx->header_end - ctx->header_start;
648
649 ctx->errcode.data = ngx_palloc(s->connection->pool,
650 ctx->errcode.len);
651 if (ctx->errcode.data == NULL) {
652 ngx_close_connection(ctx->peer.connection);
653 ngx_destroy_pool(ctx->pool);
654 ngx_mail_session_internal_server_error(s);
655 return;
656 }
657
658 ngx_memcpy(ctx->errcode.data, ctx->header_start,
659 ctx->errcode.len);
660
661 continue;
662 }
663
664 /* ignore other headers */
665
666 continue;
667 }
668
669 if (rc == NGX_DONE) {
670 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
671 "mail auth http header done");
672
673 ngx_close_connection(ctx->peer.connection);
674
675 if (ctx->err.len) {
676
677 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0,
678 "client login failed: \"%V\"", &ctx->errmsg);
679
680 if (s->protocol == NGX_MAIL_SMTP_PROTOCOL) {
681
682 if (ctx->errcode.len == 0) {
683 ctx->errcode = ngx_mail_smtp_errcode;
684 }
685
686 ctx->err.len = ctx->errcode.len + ctx->errmsg.len
687 + sizeof(" " CRLF) - 1;
688
689 p = ngx_palloc(s->connection->pool, ctx->err.len);
690 if (p == NULL) {
691 ngx_close_connection(ctx->peer.connection);
692 ngx_destroy_pool(ctx->pool);
693 ngx_mail_session_internal_server_error(s);
694 return;
695 }
696
697 ctx->err.data = p;
698
699 p = ngx_cpymem(p, ctx->errcode.data, ctx->errcode.len);
700 *p++ = ' ';
701 p = ngx_cpymem(p, ctx->errmsg.data, ctx->errmsg.len);
702 *p++ = CR; *p = LF;
703 }
704
705 s->out = ctx->err;
706 timer = ctx->sleep;
707
708 ngx_destroy_pool(ctx->pool);
709
710 if (timer == 0) {
711 s->quit = 1;
712 ngx_mail_send(s->connection->write);
713 return;
714 }
715
716 ngx_add_timer(s->connection->read, timer * 1000);
717
718 s->connection->read->handler = ngx_mail_auth_sleep_handler;
719
720 return;
721 }
722
723 if (s->auth_wait) {
724 timer = ctx->sleep;
725
726 ngx_destroy_pool(ctx->pool);
727
728 if (timer == 0) {
729 ngx_mail_auth_http_init(s);
730 return;
731 }
732
733 ngx_add_timer(s->connection->read, timer * 1000);
734
735 s->connection->read->handler = ngx_mail_auth_sleep_handler;
736
737 return;
738 }
739
740 if (ctx->addr.len == 0 || ctx->port.len == 0) {
741 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
742 "auth http server %V did not send server or port",
743 ctx->peer.name);
744 ngx_destroy_pool(ctx->pool);
745 ngx_mail_session_internal_server_error(s);
746 return;
747 }
748
749 if (s->passwd.data == NULL && s->protocol != NGX_MAIL_SMTP_PROTOCOL)
750 {
751 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
752 "auth http server %V did not send password",
753 ctx->peer.name);
754 ngx_destroy_pool(ctx->pool);
755 ngx_mail_session_internal_server_error(s);
756 return;
757 }
758
759 peer = ngx_pcalloc(s->connection->pool, sizeof(ngx_peer_addr_t));
760 if (peer == NULL) {
761 ngx_destroy_pool(ctx->pool);
762 ngx_mail_session_internal_server_error(s);
763 return;
764 }
765
766 sin = ngx_pcalloc(s->connection->pool, sizeof(struct sockaddr_in));
767 if (sin == NULL) {
768 ngx_destroy_pool(ctx->pool);
769 ngx_mail_session_internal_server_error(s);
770 return;
771 }
772
773 sin->sin_family = AF_INET;
774
775 port = ngx_atoi(ctx->port.data, ctx->port.len);
776 if (port == NGX_ERROR || port < 1 || port > 65536) {
777 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
778 "auth http server %V sent invalid server "
779 "port:\"%V\"",
780 ctx->peer.name, &ctx->port);
781 ngx_destroy_pool(ctx->pool);
782 ngx_mail_session_internal_server_error(s);
783 return;
784 }
785
786 sin->sin_port = htons((in_port_t) port);
787
788 ctx->addr.data[ctx->addr.len] = '\0';
789 sin->sin_addr.s_addr = inet_addr((char *) ctx->addr.data);
790 if (sin->sin_addr.s_addr == INADDR_NONE) {
791 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
792 "auth http server %V sent invalid server "
793 "address:\"%V\"",
794 ctx->peer.name, &ctx->addr);
795 ngx_destroy_pool(ctx->pool);
796 ngx_mail_session_internal_server_error(s);
797 return;
798 }
799
800 peer->sockaddr = (struct sockaddr *) sin;
801 peer->socklen = sizeof(struct sockaddr_in);
802
803 len = ctx->addr.len + 1 + ctx->port.len;
804
805 peer->name.len = len;
806
807 peer->name.data = ngx_palloc(s->connection->pool, len);
808 if (peer->name.data == NULL) {
809 ngx_destroy_pool(ctx->pool);
810 ngx_mail_session_internal_server_error(s);
811 return;
812 }
813
814 len = ctx->addr.len;
815
816 ngx_memcpy(peer->name.data, ctx->addr.data, len);
817
818 peer->name.data[len++] = ':';
819
820 ngx_memcpy(peer->name.data + len, ctx->port.data, ctx->port.len);
821
822 ngx_destroy_pool(ctx->pool);
823 ngx_mail_proxy_init(s, peer);
824
825 return;
826 }
827
828 if (rc == NGX_AGAIN ) {
829 return;
830 }
831
832 /* rc == NGX_ERROR */
833
834 ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
835 "auth http server %V sent invalid header in response",
836 ctx->peer.name);
837 ngx_close_connection(ctx->peer.connection);
838 ngx_destroy_pool(ctx->pool);
839 ngx_mail_session_internal_server_error(s);
840
841 return;
842 }
843 }
844
845
846 static void
847 ngx_mail_auth_sleep_handler(ngx_event_t *rev)
848 {
849 ngx_connection_t *c;
850 ngx_mail_session_t *s;
851 ngx_mail_core_srv_conf_t *cscf;
852
853 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0, "mail auth sleep handler");
854
855 c = rev->data;
856 s = c->data;
857
858 if (rev->timedout) {
859
860 rev->timedout = 0;
861
862 if (s->auth_wait) {
863 s->auth_wait = 0;
864 ngx_mail_auth_http_init(s);
865 return;
866 }
867
868 switch (s->protocol) {
869
870 case NGX_MAIL_POP3_PROTOCOL:
871 s->mail_state = ngx_pop3_start;
872 s->connection->read->handler = ngx_pop3_auth_state;
873 break;
874
875 case NGX_MAIL_IMAP_PROTOCOL:
876 s->mail_state = ngx_imap_start;
877 s->connection->read->handler = ngx_imap_auth_state;
878 break;
879
880 default: /* NGX_MAIL_SMTP_PROTOCOL */
881 s->mail_state = ngx_smtp_start;
882 s->connection->read->handler = ngx_smtp_auth_state;
883 break;
884 }
885
886 s->auth_method = NGX_MAIL_AUTH_PLAIN;
887
888 c->log->action = "in auth state";
889
890 ngx_mail_send(s->connection->write);
891
892 if (c->destroyed) {
893 return;
894 }
895
896 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module);
897
898 ngx_add_timer(rev, cscf->timeout);
899
900 if (rev->ready) {
901 s->connection->read->handler(rev);
902 return;
903 }
904
905 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
906 ngx_mail_close_connection(s->connection);
907 }
908
909 return;
910 }
911
912 if (rev->active) {
913 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
914 ngx_mail_close_connection(s->connection);
915 }
916 }
917 }
918
919
920 static ngx_int_t
921 ngx_mail_auth_http_parse_header_line(ngx_mail_session_t *s,
922 ngx_mail_auth_http_ctx_t *ctx)
923 {
924 u_char c, ch, *p;
925 ngx_uint_t hash;
926 enum {
927 sw_start = 0,
928 sw_name,
929 sw_space_before_value,
930 sw_value,
931 sw_space_after_value,
932 sw_almost_done,
933 sw_header_almost_done
934 } state;
935
936 state = ctx->state;
937 hash = ctx->hash;
938
939 for (p = ctx->response->pos; p < ctx->response->last; p++) {
940 ch = *p;
941
942 switch (state) {
943
944 /* first char */
945 case sw_start:
946
947 switch (ch) {
948 case CR:
949 ctx->header_end = p;
950 state = sw_header_almost_done;
951 break;
952 case LF:
953 ctx->header_end = p;
954 goto header_done;
955 default:
956 state = sw_name;
957 ctx->header_name_start = p;
958
959 c = (u_char) (ch | 0x20);
960 if (c >= 'a' && c <= 'z') {
961 hash = c;
962 break;
963 }
964
965 if (ch >= '0' && ch <= '9') {
966 hash = ch;
967 break;
968 }
969
970 return NGX_ERROR;
971 }
972 break;
973
974 /* header name */
975 case sw_name:
976 c = (u_char) (ch | 0x20);
977 if (c >= 'a' && c <= 'z') {
978 hash += c;
979 break;
980 }
981
982 if (ch == ':') {
983 ctx->header_name_end = p;
984 state = sw_space_before_value;
985 break;
986 }
987
988 if (ch == '-') {
989 hash += ch;
990 break;
991 }
992
993 if (ch >= '0' && ch <= '9') {
994 hash += ch;
995 break;
996 }
997
998 if (ch == CR) {
999 ctx->header_name_end = p;
1000 ctx->header_start = p;
1001 ctx->header_end = p;
1002 state = sw_almost_done;
1003 break;
1004 }
1005
1006 if (ch == LF) {
1007 ctx->header_name_end = p;
1008 ctx->header_start = p;
1009 ctx->header_end = p;
1010 goto done;
1011 }
1012
1013 return NGX_ERROR;
1014
1015 /* space* before header value */
1016 case sw_space_before_value:
1017 switch (ch) {
1018 case ' ':
1019 break;
1020 case CR:
1021 ctx->header_start = p;
1022 ctx->header_end = p;
1023 state = sw_almost_done;
1024 break;
1025 case LF:
1026 ctx->header_start = p;
1027 ctx->header_end = p;
1028 goto done;
1029 default:
1030 ctx->header_start = p;
1031 state = sw_value;
1032 break;
1033 }
1034 break;
1035
1036 /* header value */
1037 case sw_value:
1038 switch (ch) {
1039 case ' ':
1040 ctx->header_end = p;
1041 state = sw_space_after_value;
1042 break;
1043 case CR:
1044 ctx->header_end = p;
1045 state = sw_almost_done;
1046 break;
1047 case LF:
1048 ctx->header_end = p;
1049 goto done;
1050 }
1051 break;
1052
1053 /* space* before end of header line */
1054 case sw_space_after_value:
1055 switch (ch) {
1056 case ' ':
1057 break;
1058 case CR:
1059 state = sw_almost_done;
1060 break;
1061 case LF:
1062 goto done;
1063 default:
1064 state = sw_value;
1065 break;
1066 }
1067 break;
1068
1069 /* end of header line */
1070 case sw_almost_done:
1071 switch (ch) {
1072 case LF:
1073 goto done;
1074 default:
1075 return NGX_ERROR;
1076 }
1077
1078 /* end of header */
1079 case sw_header_almost_done:
1080 switch (ch) {
1081 case LF:
1082 goto header_done;
1083 default:
1084 return NGX_ERROR;
1085 }
1086 }
1087 }
1088
1089 ctx->response->pos = p;
1090 ctx->state = state;
1091 ctx->hash = hash;
1092
1093 return NGX_AGAIN;
1094
1095 done:
1096
1097 ctx->response->pos = p + 1;
1098 ctx->state = sw_start;
1099 ctx->hash = hash;
1100
1101 return NGX_OK;
1102
1103 header_done:
1104
1105 ctx->response->pos = p + 1;
1106 ctx->state = sw_start;
1107
1108 return NGX_DONE;
1109 }
1110
1111
1112 static void
1113 ngx_mail_auth_http_block_read(ngx_event_t *rev)
1114 {
1115 ngx_connection_t *c;
1116 ngx_mail_session_t *s;
1117 ngx_mail_auth_http_ctx_t *ctx;
1118
1119 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, rev->log, 0,
1120 "mail auth http block read");
1121
1122 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
1123 c = rev->data;
1124 s = c->data;
1125
1126 ctx = ngx_mail_get_module_ctx(s, ngx_mail_auth_http_module);
1127
1128 ngx_close_connection(ctx->peer.connection);
1129 ngx_destroy_pool(ctx->pool);
1130 ngx_mail_session_internal_server_error(s);
1131 }
1132 }
1133
1134
1135 static void
1136 ngx_mail_auth_http_dummy_handler(ngx_event_t *ev)
1137 {
1138 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, ev->log, 0,
1139 "mail auth http dummy handler");
1140 }
1141
1142
1143 static ngx_buf_t *
1144 ngx_mail_auth_http_create_request(ngx_mail_session_t *s, ngx_pool_t *pool,
1145 ngx_mail_auth_http_conf_t *ahcf)
1146 {
1147 size_t len;
1148 ngx_buf_t *b;
1149 ngx_str_t login, passwd;
1150
1151 if (ngx_mail_auth_http_escape(pool, &s->login, &login) != NGX_OK) {
1152 return NULL;
1153 }
1154
1155 if (ngx_mail_auth_http_escape(pool, &s->passwd, &passwd) != NGX_OK) {
1156 return NULL;
1157 }
1158
1159 len = sizeof("GET ") - 1 + ahcf->uri.len + sizeof(" HTTP/1.0" CRLF) - 1
1160 + sizeof("Host: ") - 1 + ahcf->host_header.len + sizeof(CRLF) - 1
1161 + sizeof("Auth-Method: ") - 1
1162 + ngx_mail_auth_http_method[s->auth_method].len
1163 + sizeof(CRLF) - 1
1164 + sizeof("Auth-User: ") - 1 + login.len + sizeof(CRLF) - 1
1165 + sizeof("Auth-Pass: ") - 1 + passwd.len + sizeof(CRLF) - 1
1166 + sizeof("Auth-Salt: ") - 1 + s->salt.len
1167 + sizeof("Auth-Protocol: imap" CRLF) - 1
1168 + sizeof("Auth-Login-Attempt: ") - 1 + NGX_INT_T_LEN
1169 + sizeof(CRLF) - 1
1170 + sizeof("Client-IP: ") - 1 + s->connection->addr_text.len
1171 + sizeof(CRLF) - 1
1172 + sizeof(CRLF) - 1;
1173
1174 b = ngx_create_temp_buf(pool, len);
1175 if (b == NULL) {
1176 return NULL;
1177 }
1178
1179 b->last = ngx_cpymem(b->last, "GET ", sizeof("GET ") - 1);
1180 b->last = ngx_copy(b->last, ahcf->uri.data, ahcf->uri.len);
1181 b->last = ngx_cpymem(b->last, " HTTP/1.0" CRLF,
1182 sizeof(" HTTP/1.0" CRLF) - 1);
1183
1184 b->last = ngx_cpymem(b->last, "Host: ", sizeof("Host: ") - 1);
1185 b->last = ngx_copy(b->last, ahcf->host_header.data,
1186 ahcf->host_header.len);
1187 *b->last++ = CR; *b->last++ = LF;
1188
1189 b->last = ngx_cpymem(b->last, "Auth-Method: ",
1190 sizeof("Auth-Method: ") - 1);
1191 b->last = ngx_cpymem(b->last,
1192 ngx_mail_auth_http_method[s->auth_method].data,
1193 ngx_mail_auth_http_method[s->auth_method].len);
1194 *b->last++ = CR; *b->last++ = LF;
1195
1196 b->last = ngx_cpymem(b->last, "Auth-User: ", sizeof("Auth-User: ") - 1);
1197 b->last = ngx_copy(b->last, login.data, login.len);
1198 *b->last++ = CR; *b->last++ = LF;
1199
1200 b->last = ngx_cpymem(b->last, "Auth-Pass: ", sizeof("Auth-Pass: ") - 1);
1201 b->last = ngx_copy(b->last, passwd.data, passwd.len);
1202 *b->last++ = CR; *b->last++ = LF;
1203
1204 if (s->auth_method != NGX_MAIL_AUTH_PLAIN && s->salt.len) {
1205 b->last = ngx_cpymem(b->last, "Auth-Salt: ", sizeof("Auth-Salt: ") - 1);
1206 b->last = ngx_copy(b->last, s->salt.data, s->salt.len);
1207
1208 s->passwd.data = NULL;
1209 }
1210
1211 b->last = ngx_cpymem(b->last, "Auth-Protocol: ",
1212 sizeof("Auth-Protocol: ") - 1);
1213 b->last = ngx_cpymem(b->last, ngx_mail_auth_http_protocol[s->protocol],
1214 sizeof("imap") - 1);
1215 *b->last++ = CR; *b->last++ = LF;
1216
1217 b->last = ngx_sprintf(b->last, "Auth-Login-Attempt: %ui" CRLF,
1218 s->login_attempt);
1219
1220 b->last = ngx_cpymem(b->last, "Client-IP: ", sizeof("Client-IP: ") - 1);
1221 b->last = ngx_copy(b->last, s->connection->addr_text.data,
1222 s->connection->addr_text.len);
1223 *b->last++ = CR; *b->last++ = LF;
1224
1225 if (ahcf->header.len) {
1226 b->last = ngx_copy(b->last, ahcf->header.data, ahcf->header.len);
1227 }
1228
1229 /* add "\r\n" at the header end */
1230 *b->last++ = CR; *b->last++ = LF;
1231
1232 #if (NGX_DEBUG_MAIL_PASSWD)
1233 {
1234 ngx_str_t l;
1235
1236 l.len = b->last - b->pos;
1237 l.data = b->pos;
1238 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0,
1239 "mail auth http header:\n\"%V\"", &l);
1240 }
1241 #endif
1242
1243 return b;
1244 }
1245
1246
1247 static ngx_int_t
1248 ngx_mail_auth_http_escape(ngx_pool_t *pool, ngx_str_t *text, ngx_str_t *escaped)
1249 {
1250 u_char ch, *p;
1251 ngx_uint_t i, n;
1252
1253 n = 0;
1254
1255 for (i = 0; i < text->len; i++) {
1256 ch = text->data[i];
1257
1258 if (ch == CR || ch == LF) {
1259 n++;
1260 }
1261 }
1262
1263 if (n == 0) {
1264 *escaped = *text;
1265 return NGX_OK;
1266 }
1267
1268 escaped->len = text->len + n * 2;
1269
1270 p = ngx_palloc(pool, escaped->len);
1271 if (p == NULL) {
1272 return NGX_ERROR;
1273 }
1274
1275 escaped->data = p;
1276
1277 for (i = 0; i < text->len; i++) {
1278 ch = text->data[i];
1279
1280 if (ch == CR) {
1281 *p++ = '%';
1282 *p++ = '0';
1283 *p++ = 'D';
1284 continue;
1285 }
1286
1287 if (ch == LF) {
1288 *p++ = '%';
1289 *p++ = '0';
1290 *p++ = 'A';
1291 continue;
1292 }
1293
1294 *p++ = ch;
1295 }
1296
1297 return NGX_OK;
1298 }
1299
1300
1301 static void *
1302 ngx_mail_auth_http_create_conf(ngx_conf_t *cf)
1303 {
1304 ngx_mail_auth_http_conf_t *ahcf;
1305
1306 ahcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_auth_http_conf_t));
1307 if (ahcf == NULL) {
1308 return NGX_CONF_ERROR;
1309 }
1310
1311 ahcf->timeout = NGX_CONF_UNSET_MSEC;
1312
1313 return ahcf;
1314 }
1315
1316
1317 static char *
1318 ngx_mail_auth_http_merge_conf(ngx_conf_t *cf, void *parent, void *child)
1319 {
1320 ngx_mail_auth_http_conf_t *prev = parent;
1321 ngx_mail_auth_http_conf_t *conf = child;
1322
1323 u_char *p;
1324 size_t len;
1325 ngx_uint_t i;
1326 ngx_table_elt_t *header;
1327
1328 if (conf->peer == NULL) {
1329 conf->peer = prev->peer;
1330 conf->host_header = prev->host_header;
1331 conf->uri = prev->uri;
1332 }
1333
1334 ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000);
1335
1336 if (conf->headers == NULL) {
1337 conf->headers = prev->headers;
1338 conf->header = prev->header;
1339 }
1340
1341 if (conf->headers && conf->header.len == 0) {
1342 len = 0;
1343 header = conf->headers->elts;
1344 for (i = 0; i < conf->headers->nelts; i++) {
1345 len += header[i].key.len + 2 + header[i].value.len + 2;
1346 }
1347
1348 p = ngx_palloc(cf->pool, len);
1349 if (p == NULL) {
1350 return NGX_CONF_ERROR;
1351 }
1352
1353 conf->header.len = len;
1354 conf->header.data = p;
1355
1356 for (i = 0; i < conf->headers->nelts; i++) {
1357 p = ngx_cpymem(p, header[i].key.data, header[i].key.len);
1358 *p++ = ':'; *p++ = ' ';
1359 p = ngx_cpymem(p, header[i].value.data, header[i].value.len);
1360 *p++ = CR; *p++ = LF;
1361 }
1362 }
1363
1364 return NGX_CONF_OK;
1365 }
1366
1367
1368 static char *
1369 ngx_mail_auth_http(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1370 {
1371 ngx_mail_auth_http_conf_t *ahcf = conf;
1372
1373 ngx_str_t *value;
1374 ngx_url_t u;
1375
1376 value = cf->args->elts;
1377
1378 ngx_memzero(&u, sizeof(ngx_url_t));
1379
1380 u.url = value[1];
1381 u.default_port = 80;
1382 u.uri_part = 1;
1383 u.one_addr = 1;
1384
1385 if (ngx_parse_url(cf, &u) != NGX_OK) {
1386 if (u.err) {
1387 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1388 "%s in auth_http \"%V\"", u.err, &u.url);
1389 }
1390 }
1391
1392 ahcf->peer = u.addrs;
1393
1394 ahcf->host_header = u.host;
1395 ahcf->uri = u.uri;
1396
1397 if (ahcf->uri.len == 0) {
1398 ahcf->uri.len = sizeof("/") - 1;
1399 ahcf->uri.data = (u_char *) "/";
1400 }
1401
1402 return NGX_CONF_OK;
1403 }
1404
1405
1406 static char *
1407 ngx_mail_auth_http_header(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1408 {
1409 ngx_mail_auth_http_conf_t *ahcf = conf;
1410
1411 ngx_str_t *value;
1412 ngx_table_elt_t *header;
1413
1414 if (ahcf->headers == NULL) {
1415 ahcf->headers = ngx_array_create(cf->pool, 1, sizeof(ngx_table_elt_t));
1416 if (ahcf->headers == NULL) {
1417 return NGX_CONF_ERROR;
1418 }
1419 }
1420
1421 header = ngx_array_push(ahcf->headers);
1422 if (header == NULL) {
1423 return NGX_CONF_ERROR;
1424 }
1425
1426 value = cf->args->elts;
1427
1428 header->key = value[1];
1429 header->value = value[2];
1430
1431 return NGX_CONF_OK;
1432 }