Mercurial > hg > nginx-vendor-0-8
comparison src/mail/ngx_mail_handler.c @ 336:1c519aff5c0c NGINX_0_6_12
nginx 0.6.12
*) Change: mail proxy was split on three modules: pop3, imap and smtp.
*) Feature: the --without-mail_pop3_module, --without-mail_imap_module,
and --without-mail_smtp_module configuration parameters.
*) Feature: the "smtp_greeting_delay" and "smtp_client_buffer"
directives of the ngx_mail_smtp_module.
*) Bugfix: the trailing wildcards did not work; bug appeared in 0.6.9.
*) Bugfix: nginx could not start on Solaris if the shared PCRE library
located in non-standard place was used.
*) Bugfix: the "proxy_hide_header" and "fastcgi_hide_header" directives
did not hide response header lines whose name was longer than 32
characters.
Thanks to Manlio Perillo.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Fri, 21 Sep 2007 00:00:00 +0400 |
parents | d16d691432c9 |
children | b743d290eb3b |
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335:9a32ae248b7a | 336:1c519aff5c0c |
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9 #include <ngx_event.h> | 9 #include <ngx_event.h> |
10 #include <ngx_mail.h> | 10 #include <ngx_mail.h> |
11 | 11 |
12 | 12 |
13 static void ngx_mail_init_session(ngx_connection_t *c); | 13 static void ngx_mail_init_session(ngx_connection_t *c); |
14 static void ngx_mail_init_protocol(ngx_event_t *rev); | |
15 static ngx_int_t ngx_mail_decode_auth_plain(ngx_mail_session_t *s, | |
16 ngx_str_t *encoded); | |
17 static void ngx_mail_do_auth(ngx_mail_session_t *s); | |
18 static ngx_int_t ngx_mail_read_command(ngx_mail_session_t *s); | |
19 static u_char *ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len); | |
20 | 14 |
21 #if (NGX_MAIL_SSL) | 15 #if (NGX_MAIL_SSL) |
22 static void ngx_mail_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c); | 16 static void ngx_mail_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c); |
23 static void ngx_mail_ssl_handshake_handler(ngx_connection_t *c); | 17 static void ngx_mail_ssl_handshake_handler(ngx_connection_t *c); |
24 #endif | 18 #endif |
25 | |
26 | |
27 static ngx_str_t greetings[] = { | |
28 ngx_string("+OK POP3 ready" CRLF), | |
29 ngx_string("* OK IMAP4 ready" CRLF) | |
30 /* SMTP greeting */ | |
31 }; | |
32 | |
33 static ngx_str_t internal_server_errors[] = { | |
34 ngx_string("-ERR internal server error" CRLF), | |
35 ngx_string("* BAD internal server error" CRLF), | |
36 ngx_string("451 4.3.2 Internal server error" CRLF), | |
37 }; | |
38 | |
39 static u_char pop3_ok[] = "+OK" CRLF; | |
40 static u_char pop3_next[] = "+ " CRLF; | |
41 static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; | |
42 static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; | |
43 static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; | |
44 | |
45 static u_char imap_star[] = "* "; | |
46 static u_char imap_ok[] = "OK completed" CRLF; | |
47 static u_char imap_next[] = "+ OK" CRLF; | |
48 static u_char imap_bye[] = "* BYE" CRLF; | |
49 static u_char imap_invalid_command[] = "BAD invalid command" CRLF; | |
50 | |
51 static u_char smtp_ok[] = "250 2.0.0 OK" CRLF; | |
52 static u_char smtp_bye[] = "221 2.0.0 Bye" CRLF; | |
53 static u_char smtp_next[] = "334 " CRLF; | |
54 static u_char smtp_username[] = "334 VXNlcm5hbWU6" CRLF; | |
55 static u_char smtp_password[] = "334 UGFzc3dvcmQ6" CRLF; | |
56 static u_char smtp_invalid_command[] = "500 5.5.1 Invalid command" CRLF; | |
57 static u_char smtp_invalid_argument[] = "501 5.5.4 Invalid argument" CRLF; | |
58 static u_char smtp_auth_required[] = "530 5.7.1 Authentication required" CRLF; | |
59 | 19 |
60 | 20 |
61 void | 21 void |
62 ngx_mail_init_connection(ngx_connection_t *c) | 22 ngx_mail_init_connection(ngx_connection_t *c) |
63 { | 23 { |
170 } | 130 } |
171 | 131 |
172 | 132 |
173 #if (NGX_MAIL_SSL) | 133 #if (NGX_MAIL_SSL) |
174 | 134 |
175 static void | 135 void |
176 ngx_mail_starttls_handler(ngx_event_t *rev) | 136 ngx_mail_starttls_handler(ngx_event_t *rev) |
177 { | 137 { |
178 ngx_connection_t *c; | 138 ngx_connection_t *c; |
179 ngx_mail_session_t *s; | 139 ngx_mail_session_t *s; |
180 ngx_mail_ssl_conf_t *sslcf; | 140 ngx_mail_ssl_conf_t *sslcf; |
220 | 180 |
221 | 181 |
222 static void | 182 static void |
223 ngx_mail_ssl_handshake_handler(ngx_connection_t *c) | 183 ngx_mail_ssl_handshake_handler(ngx_connection_t *c) |
224 { | 184 { |
225 ngx_mail_session_t *s; | 185 ngx_mail_session_t *s; |
186 ngx_mail_core_srv_conf_t *cscf; | |
226 | 187 |
227 if (c->ssl->handshaked) { | 188 if (c->ssl->handshaked) { |
228 | 189 |
229 s = c->data; | 190 s = c->data; |
230 | 191 |
231 if (s->starttls) { | 192 if (s->starttls) { |
232 c->read->handler = ngx_mail_init_protocol; | 193 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
194 | |
195 c->read->handler = cscf->protocol->init_protocol; | |
233 c->write->handler = ngx_mail_send; | 196 c->write->handler = ngx_mail_send; |
234 | 197 |
235 ngx_mail_init_protocol(c->read); | 198 cscf->protocol->init_protocol(c->read); |
236 | 199 |
237 return; | 200 return; |
238 } | 201 } |
239 | 202 |
240 ngx_mail_init_session(c); | 203 ngx_mail_init_session(c); |
248 | 211 |
249 | 212 |
250 static void | 213 static void |
251 ngx_mail_init_session(ngx_connection_t *c) | 214 ngx_mail_init_session(ngx_connection_t *c) |
252 { | 215 { |
253 u_char *p; | |
254 ngx_mail_session_t *s; | 216 ngx_mail_session_t *s; |
255 ngx_mail_core_srv_conf_t *cscf; | 217 ngx_mail_core_srv_conf_t *cscf; |
256 | 218 |
257 c->read->handler = ngx_mail_init_protocol; | |
258 c->write->handler = ngx_mail_send; | |
259 | |
260 s = c->data; | 219 s = c->data; |
261 | 220 |
262 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | 221 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
263 | 222 |
264 s->protocol = cscf->protocol; | 223 s->protocol = cscf->protocol->type; |
265 | 224 |
266 s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_mail_max_module); | 225 s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_mail_max_module); |
267 if (s->ctx == NULL) { | 226 if (s->ctx == NULL) { |
268 ngx_mail_session_internal_server_error(s); | 227 ngx_mail_session_internal_server_error(s); |
269 return; | 228 return; |
270 } | 229 } |
271 | 230 |
272 if (s->protocol == NGX_MAIL_SMTP_PROTOCOL) { | 231 c->write->handler = ngx_mail_send; |
273 s->out = cscf->smtp_greeting; | 232 |
274 | 233 cscf->protocol->init_session(s, c); |
275 } else { | 234 } |
276 s->out = greetings[s->protocol]; | 235 |
277 } | 236 |
278 | 237 ngx_int_t |
279 if ((s->protocol == NGX_MAIL_POP3_PROTOCOL | 238 ngx_mail_salt(ngx_mail_session_t *s, ngx_connection_t *c, |
280 && (cscf->pop3_auth_methods | 239 ngx_mail_core_srv_conf_t *cscf) |
281 & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED))) | 240 { |
282 | 241 s->salt.data = ngx_palloc(c->pool, |
283 || (s->protocol == NGX_MAIL_IMAP_PROTOCOL | 242 sizeof(" <18446744073709551616.@>" CRLF) - 1 |
284 && (cscf->imap_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) | 243 + NGX_TIME_T_LEN |
285 | 244 + cscf->server_name.len); |
286 || (s->protocol == NGX_MAIL_SMTP_PROTOCOL | 245 if (s->salt.data == NULL) { |
287 && (cscf->smtp_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED))) | 246 return NGX_ERROR; |
288 { | 247 } |
289 s->salt.data = ngx_palloc(c->pool, | 248 |
290 sizeof(" <18446744073709551616.@>" CRLF) - 1 | 249 s->salt.len = ngx_sprintf(s->salt.data, "<%ul.%T@%V>" CRLF, |
291 + NGX_TIME_T_LEN | 250 ngx_random(), ngx_time(), &cscf->server_name) |
292 + cscf->server_name.len); | 251 - s->salt.data; |
293 if (s->salt.data == NULL) { | 252 |
294 ngx_mail_session_internal_server_error(s); | 253 return NGX_OK; |
295 return; | 254 } |
296 } | 255 |
297 | 256 |
298 s->salt.len = ngx_sprintf(s->salt.data, "<%ul.%T@%V>" CRLF, | 257 #if (NGX_MAIL_SSL) |
299 ngx_random(), ngx_time(), &cscf->server_name) | 258 |
300 - s->salt.data; | 259 ngx_int_t |
301 | 260 ngx_mail_starttls_only(ngx_mail_session_t *s, ngx_connection_t *c) |
302 if (s->protocol == NGX_MAIL_POP3_PROTOCOL) { | 261 { |
303 s->out.data = ngx_palloc(c->pool, | 262 ngx_mail_ssl_conf_t *sslcf; |
304 greetings[0].len + 1 + s->salt.len); | 263 |
305 if (s->out.data == NULL) { | 264 if (c->ssl) { |
306 ngx_mail_session_internal_server_error(s); | 265 return 0; |
307 return; | 266 } |
308 } | 267 |
309 | 268 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); |
310 p = ngx_cpymem(s->out.data, | 269 |
311 greetings[0].data, greetings[0].len - 2); | 270 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { |
312 *p++ = ' '; | 271 return 1; |
313 p = ngx_cpymem(p, s->salt.data, s->salt.len); | 272 } |
314 | 273 |
315 s->out.len = p - s->out.data; | 274 return 0; |
316 } | 275 } |
317 } | 276 |
318 | 277 #endif |
319 ngx_add_timer(c->read, cscf->timeout); | 278 |
320 | 279 |
321 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) { | 280 ngx_int_t |
322 ngx_mail_close_connection(c); | 281 ngx_mail_auth_plain(ngx_mail_session_t *s, ngx_connection_t *c, ngx_uint_t n) |
323 } | 282 { |
324 | 283 u_char *p, *last; |
325 ngx_mail_send(c->write); | 284 ngx_str_t *arg, plain; |
285 | |
286 arg = s->args.elts; | |
287 | |
288 #if (NGX_DEBUG_MAIL_PASSWD) | |
289 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
290 "mail auth plain: \"%V\"", &arg[n]); | |
291 #endif | |
292 | |
293 plain.data = ngx_palloc(c->pool, ngx_base64_decoded_length(arg[n].len)); | |
294 if (plain.data == NULL){ | |
295 return NGX_ERROR; | |
296 } | |
297 | |
298 if (ngx_decode_base64(&plain, &arg[n]) != NGX_OK) { | |
299 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
300 "client sent invalid base64 encoding in AUTH PLAIN command"); | |
301 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
302 } | |
303 | |
304 p = plain.data; | |
305 last = p + plain.len; | |
306 | |
307 while (p < last && *p++) { /* void */ } | |
308 | |
309 if (p == last) { | |
310 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
311 "client sent invalid login in AUTH PLAIN command"); | |
312 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
313 } | |
314 | |
315 s->login.data = p; | |
316 | |
317 while (p < last && *p) { p++; } | |
318 | |
319 if (p == last) { | |
320 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
321 "client sent invalid password in AUTH PLAIN command"); | |
322 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
323 } | |
324 | |
325 s->login.len = p++ - s->login.data; | |
326 | |
327 s->passwd.len = last - p; | |
328 s->passwd.data = p; | |
329 | |
330 #if (NGX_DEBUG_MAIL_PASSWD) | |
331 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
332 "mail auth plain: \"%V\" \"%V\"", &s->login, &s->passwd); | |
333 #endif | |
334 | |
335 return NGX_DONE; | |
336 } | |
337 | |
338 | |
339 ngx_int_t | |
340 ngx_mail_auth_login_username(ngx_mail_session_t *s, ngx_connection_t *c) | |
341 { | |
342 ngx_str_t *arg; | |
343 | |
344 arg = s->args.elts; | |
345 | |
346 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
347 "mail auth login username: \"%V\"", &arg[0]); | |
348 | |
349 s->login.data = ngx_palloc(c->pool, ngx_base64_decoded_length(arg[0].len)); | |
350 if (s->login.data == NULL){ | |
351 return NGX_ERROR; | |
352 } | |
353 | |
354 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
355 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
356 "client sent invalid base64 encoding in AUTH LOGIN command"); | |
357 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
358 } | |
359 | |
360 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
361 "mail auth login username: \"%V\"", &s->login); | |
362 | |
363 return NGX_OK; | |
364 } | |
365 | |
366 | |
367 ngx_int_t | |
368 ngx_mail_auth_login_password(ngx_mail_session_t *s, ngx_connection_t *c) | |
369 { | |
370 ngx_str_t *arg; | |
371 | |
372 arg = s->args.elts; | |
373 | |
374 #if (NGX_DEBUG_MAIL_PASSWD) | |
375 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
376 "mail auth login password: \"%V\"", &arg[0]); | |
377 #endif | |
378 | |
379 s->passwd.data = ngx_palloc(c->pool, ngx_base64_decoded_length(arg[0].len)); | |
380 if (s->passwd.data == NULL){ | |
381 return NGX_ERROR; | |
382 } | |
383 | |
384 if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) { | |
385 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
386 "client sent invalid base64 encoding in AUTH LOGIN command"); | |
387 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
388 } | |
389 | |
390 #if (NGX_DEBUG_MAIL_PASSWD) | |
391 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
392 "mail auth login password: \"%V\"", &s->passwd); | |
393 #endif | |
394 | |
395 return NGX_DONE; | |
396 } | |
397 | |
398 | |
399 ngx_int_t | |
400 ngx_mail_auth_cram_md5_salt(ngx_mail_session_t *s, ngx_connection_t *c, | |
401 char *prefix, size_t len) | |
402 { | |
403 u_char *p; | |
404 ngx_str_t salt; | |
405 ngx_uint_t n; | |
406 | |
407 p = ngx_palloc(c->pool, len + ngx_base64_encoded_length(s->salt.len) + 2); | |
408 if (p == NULL) { | |
409 return NGX_ERROR; | |
410 } | |
411 | |
412 salt.data = ngx_cpymem(p, prefix, len); | |
413 s->salt.len -= 2; | |
414 | |
415 ngx_encode_base64(&salt, &s->salt); | |
416 | |
417 s->salt.len += 2; | |
418 n = len + salt.len; | |
419 p[n++] = CR; p[n++] = LF; | |
420 | |
421 s->out.len = n; | |
422 s->out.data = p; | |
423 | |
424 return NGX_OK; | |
425 } | |
426 | |
427 | |
428 ngx_int_t | |
429 ngx_mail_auth_cram_md5(ngx_mail_session_t *s, ngx_connection_t *c) | |
430 { | |
431 u_char *p, *last; | |
432 ngx_str_t *arg; | |
433 | |
434 arg = s->args.elts; | |
435 | |
436 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
437 "mail auth cram-md5: \"%V\"", &arg[0]); | |
438 | |
439 s->login.data = ngx_palloc(c->pool, ngx_base64_decoded_length(arg[0].len)); | |
440 if (s->login.data == NULL){ | |
441 return NGX_ERROR; | |
442 } | |
443 | |
444 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
445 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
446 "client sent invalid base64 encoding in AUTH CRAM-MD5 command"); | |
447 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
448 } | |
449 | |
450 p = s->login.data; | |
451 last = p + s->login.len; | |
452 | |
453 while (p < last) { | |
454 if (*p++ == ' ') { | |
455 s->login.len = p - s->login.data - 1; | |
456 s->passwd.len = last - p; | |
457 s->passwd.data = p; | |
458 break; | |
459 } | |
460 } | |
461 | |
462 if (s->passwd.len != 32) { | |
463 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
464 "client sent invalid CRAM-MD5 hash in AUTH CRAM-MD5 command"); | |
465 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
466 } | |
467 | |
468 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
469 "mail auth cram-md5: \"%V\" \"%V\"", &s->login, &s->passwd); | |
470 | |
471 s->auth_method = NGX_MAIL_AUTH_CRAM_MD5; | |
472 | |
473 return NGX_DONE; | |
326 } | 474 } |
327 | 475 |
328 | 476 |
329 void | 477 void |
330 ngx_mail_send(ngx_event_t *wev) | 478 ngx_mail_send(ngx_event_t *wev) |
389 return; | 537 return; |
390 } | 538 } |
391 } | 539 } |
392 | 540 |
393 | 541 |
394 static void | 542 ngx_int_t |
395 ngx_mail_init_protocol(ngx_event_t *rev) | 543 ngx_mail_read_command(ngx_mail_session_t *s, ngx_connection_t *c) |
396 { | 544 { |
397 size_t size; | 545 ssize_t n; |
398 ngx_connection_t *c; | 546 ngx_int_t rc; |
399 ngx_mail_session_t *s; | 547 ngx_str_t l; |
400 ngx_mail_core_srv_conf_t *cscf; | 548 ngx_mail_core_srv_conf_t *cscf; |
401 | 549 |
402 c = rev->data; | 550 n = c->recv(c, s->buffer->last, s->buffer->end - s->buffer->last); |
403 | 551 |
404 c->log->action = "in auth state"; | 552 if (n == NGX_ERROR || n == 0) { |
405 | |
406 if (rev->timedout) { | |
407 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
408 c->timedout = 1; | |
409 ngx_mail_close_connection(c); | 553 ngx_mail_close_connection(c); |
410 return; | 554 return NGX_ERROR; |
411 } | 555 } |
412 | 556 |
413 s = c->data; | 557 if (n > 0) { |
414 | 558 s->buffer->last += n; |
415 switch (s->protocol) { | 559 } |
416 | 560 |
417 case NGX_MAIL_POP3_PROTOCOL: | 561 if (n == NGX_AGAIN) { |
418 size = 128; | 562 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) { |
419 s->mail_state = ngx_pop3_start; | |
420 c->read->handler = ngx_pop3_auth_state; | |
421 break; | |
422 | |
423 case NGX_MAIL_IMAP_PROTOCOL: | |
424 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
425 size = cscf->imap_client_buffer_size; | |
426 s->mail_state = ngx_imap_start; | |
427 c->read->handler = ngx_imap_auth_state; | |
428 break; | |
429 | |
430 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
431 size = 512; | |
432 s->mail_state = ngx_smtp_start; | |
433 c->read->handler = ngx_smtp_auth_state; | |
434 break; | |
435 } | |
436 | |
437 if (s->buffer == NULL) { | |
438 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) | |
439 == NGX_ERROR) | |
440 { | |
441 ngx_mail_session_internal_server_error(s); | 563 ngx_mail_session_internal_server_error(s); |
442 return; | 564 return NGX_ERROR; |
443 } | 565 } |
444 | 566 |
445 s->buffer = ngx_create_temp_buf(c->pool, size); | 567 return NGX_AGAIN; |
446 if (s->buffer == NULL) { | 568 } |
447 ngx_mail_session_internal_server_error(s); | 569 |
448 return; | 570 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); |
449 } | 571 |
450 } | 572 rc = cscf->protocol->parse_command(s); |
451 | 573 |
452 c->read->handler(rev); | 574 if (rc == NGX_AGAIN) { |
575 | |
576 if (s->buffer->last < s->buffer->end) { | |
577 return rc; | |
578 } | |
579 | |
580 l.len = s->buffer->last - s->buffer->start; | |
581 l.data = s->buffer->start; | |
582 | |
583 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
584 "client sent too long command \"%V\"", &l); | |
585 | |
586 s->quit = 1; | |
587 | |
588 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
589 } | |
590 | |
591 if (rc == NGX_IMAP_NEXT || rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
592 return rc; | |
593 } | |
594 | |
595 if (rc == NGX_ERROR) { | |
596 ngx_mail_close_connection(c); | |
597 return NGX_ERROR; | |
598 } | |
599 | |
600 return NGX_OK; | |
453 } | 601 } |
454 | 602 |
455 | 603 |
456 void | 604 void |
457 ngx_pop3_auth_state(ngx_event_t *rev) | 605 ngx_mail_auth(ngx_mail_session_t *s, ngx_connection_t *c) |
458 { | |
459 u_char *p, *last, *text; | |
460 ssize_t size; | |
461 ngx_int_t rc; | |
462 ngx_str_t *arg, salt; | |
463 ngx_connection_t *c; | |
464 ngx_mail_session_t *s; | |
465 ngx_mail_core_srv_conf_t *cscf; | |
466 #if (NGX_MAIL_SSL) | |
467 ngx_mail_ssl_conf_t *sslcf; | |
468 #endif | |
469 | |
470 c = rev->data; | |
471 s = c->data; | |
472 | |
473 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state"); | |
474 | |
475 if (rev->timedout) { | |
476 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
477 c->timedout = 1; | |
478 ngx_mail_close_connection(c); | |
479 return; | |
480 } | |
481 | |
482 if (s->out.len) { | |
483 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy"); | |
484 s->blocked = 1; | |
485 return; | |
486 } | |
487 | |
488 s->blocked = 0; | |
489 | |
490 rc = ngx_mail_read_command(s); | |
491 | |
492 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
493 return; | |
494 } | |
495 | |
496 text = pop3_ok; | |
497 size = sizeof(pop3_ok) - 1; | |
498 | |
499 if (rc == NGX_OK) { | |
500 switch (s->mail_state) { | |
501 | |
502 case ngx_pop3_start: | |
503 | |
504 switch (s->command) { | |
505 | |
506 case NGX_POP3_USER: | |
507 | |
508 #if (NGX_MAIL_SSL) | |
509 | |
510 if (c->ssl == NULL) { | |
511 sslcf = ngx_mail_get_module_srv_conf(s, | |
512 ngx_mail_ssl_module); | |
513 | |
514 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
515 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
516 break; | |
517 } | |
518 } | |
519 #endif | |
520 | |
521 if (s->args.nelts == 1) { | |
522 s->mail_state = ngx_pop3_user; | |
523 | |
524 arg = s->args.elts; | |
525 s->login.len = arg[0].len; | |
526 s->login.data = ngx_palloc(c->pool, s->login.len); | |
527 if (s->login.data == NULL) { | |
528 ngx_mail_session_internal_server_error(s); | |
529 return; | |
530 } | |
531 | |
532 ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
533 | |
534 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
535 "pop3 login: \"%V\"", &s->login); | |
536 | |
537 break; | |
538 } | |
539 | |
540 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
541 break; | |
542 | |
543 case NGX_POP3_CAPA: | |
544 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
545 | |
546 #if (NGX_MAIL_SSL) | |
547 | |
548 if (c->ssl == NULL) { | |
549 sslcf = ngx_mail_get_module_srv_conf(s, | |
550 ngx_mail_ssl_module); | |
551 | |
552 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { | |
553 size = cscf->pop3_starttls_capability.len; | |
554 text = cscf->pop3_starttls_capability.data; | |
555 break; | |
556 } | |
557 | |
558 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
559 size = cscf->pop3_starttls_only_capability.len; | |
560 text = cscf->pop3_starttls_only_capability.data; | |
561 break; | |
562 } | |
563 } | |
564 #endif | |
565 | |
566 size = cscf->pop3_capability.len; | |
567 text = cscf->pop3_capability.data; | |
568 break; | |
569 | |
570 case NGX_POP3_APOP: | |
571 | |
572 #if (NGX_MAIL_SSL) | |
573 | |
574 if (c->ssl == NULL) { | |
575 sslcf = ngx_mail_get_module_srv_conf(s, | |
576 ngx_mail_ssl_module); | |
577 | |
578 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
579 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
580 break; | |
581 } | |
582 } | |
583 #endif | |
584 | |
585 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
586 | |
587 if ((cscf->pop3_auth_methods & NGX_MAIL_AUTH_APOP_ENABLED) | |
588 && s->args.nelts == 2) | |
589 { | |
590 arg = s->args.elts; | |
591 | |
592 s->login.len = arg[0].len; | |
593 s->login.data = ngx_palloc(c->pool, s->login.len); | |
594 if (s->login.data == NULL) { | |
595 ngx_mail_session_internal_server_error(s); | |
596 return; | |
597 } | |
598 | |
599 ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
600 | |
601 s->passwd.len = arg[1].len; | |
602 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); | |
603 if (s->passwd.data == NULL) { | |
604 ngx_mail_session_internal_server_error(s); | |
605 return; | |
606 } | |
607 | |
608 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); | |
609 | |
610 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
611 "pop3 apop: \"%V\" \"%V\"", | |
612 &s->login, &s->passwd); | |
613 | |
614 s->auth_method = NGX_MAIL_AUTH_APOP; | |
615 | |
616 ngx_mail_do_auth(s); | |
617 return; | |
618 } | |
619 | |
620 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
621 break; | |
622 | |
623 case NGX_POP3_AUTH: | |
624 | |
625 #if (NGX_MAIL_SSL) | |
626 | |
627 if (c->ssl == NULL) { | |
628 sslcf = ngx_mail_get_module_srv_conf(s, | |
629 ngx_mail_ssl_module); | |
630 | |
631 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
632 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
633 break; | |
634 } | |
635 } | |
636 #endif | |
637 | |
638 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
639 | |
640 if (s->args.nelts == 0) { | |
641 size = cscf->pop3_auth_capability.len; | |
642 text = cscf->pop3_auth_capability.data; | |
643 s->state = 0; | |
644 break; | |
645 } | |
646 | |
647 arg = s->args.elts; | |
648 | |
649 if (arg[0].len == 5) { | |
650 | |
651 if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) | |
652 == 0) | |
653 { | |
654 | |
655 if (s->args.nelts != 1) { | |
656 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
657 break; | |
658 } | |
659 | |
660 s->mail_state = ngx_pop3_auth_login_username; | |
661 | |
662 size = sizeof(pop3_username) - 1; | |
663 text = pop3_username; | |
664 | |
665 break; | |
666 | |
667 } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", | |
668 5) | |
669 == 0) | |
670 { | |
671 | |
672 if (s->args.nelts == 1) { | |
673 s->mail_state = ngx_pop3_auth_plain; | |
674 | |
675 size = sizeof(pop3_next) - 1; | |
676 text = pop3_next; | |
677 | |
678 break; | |
679 } | |
680 | |
681 if (s->args.nelts == 2) { | |
682 | |
683 /* | |
684 * workaround for Eudora for Mac: it sends | |
685 * AUTH PLAIN [base64 encoded] | |
686 */ | |
687 | |
688 rc = ngx_mail_decode_auth_plain(s, &arg[1]); | |
689 | |
690 if (rc == NGX_OK) { | |
691 ngx_mail_do_auth(s); | |
692 return; | |
693 } | |
694 | |
695 if (rc == NGX_ERROR) { | |
696 ngx_mail_session_internal_server_error(s); | |
697 return; | |
698 } | |
699 | |
700 /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
701 | |
702 break; | |
703 } | |
704 | |
705 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
706 break; | |
707 } | |
708 | |
709 } else if (arg[0].len == 8 | |
710 && ngx_strncasecmp(arg[0].data, | |
711 (u_char *) "CRAM-MD5", 8) | |
712 == 0) | |
713 { | |
714 if (!(cscf->pop3_auth_methods | |
715 & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) | |
716 || s->args.nelts != 1) | |
717 { | |
718 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
719 break; | |
720 } | |
721 | |
722 s->mail_state = ngx_pop3_auth_cram_md5; | |
723 | |
724 text = ngx_palloc(c->pool, | |
725 sizeof("+ " CRLF) - 1 | |
726 + ngx_base64_encoded_length(s->salt.len)); | |
727 if (text == NULL) { | |
728 ngx_mail_session_internal_server_error(s); | |
729 return; | |
730 } | |
731 | |
732 text[0] = '+'; text[1]= ' '; | |
733 salt.data = &text[2]; | |
734 s->salt.len -= 2; | |
735 | |
736 ngx_encode_base64(&salt, &s->salt); | |
737 | |
738 s->salt.len += 2; | |
739 size = 2 + salt.len; | |
740 text[size++] = CR; text[size++] = LF; | |
741 | |
742 break; | |
743 } | |
744 | |
745 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
746 break; | |
747 | |
748 case NGX_POP3_QUIT: | |
749 s->quit = 1; | |
750 break; | |
751 | |
752 case NGX_POP3_NOOP: | |
753 break; | |
754 | |
755 #if (NGX_MAIL_SSL) | |
756 | |
757 case NGX_POP3_STLS: | |
758 if (c->ssl == NULL) { | |
759 sslcf = ngx_mail_get_module_srv_conf(s, | |
760 ngx_mail_ssl_module); | |
761 if (sslcf->starttls) { | |
762 c->read->handler = ngx_mail_starttls_handler; | |
763 break; | |
764 } | |
765 } | |
766 | |
767 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
768 break; | |
769 #endif | |
770 | |
771 default: | |
772 s->mail_state = ngx_pop3_start; | |
773 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
774 break; | |
775 } | |
776 | |
777 break; | |
778 | |
779 case ngx_pop3_user: | |
780 | |
781 switch (s->command) { | |
782 | |
783 case NGX_POP3_PASS: | |
784 if (s->args.nelts == 1) { | |
785 arg = s->args.elts; | |
786 s->passwd.len = arg[0].len; | |
787 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); | |
788 if (s->passwd.data == NULL) { | |
789 ngx_mail_session_internal_server_error(s); | |
790 return; | |
791 } | |
792 | |
793 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); | |
794 | |
795 #if (NGX_DEBUG_MAIL_PASSWD) | |
796 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
797 "pop3 passwd: \"%V\"", &s->passwd); | |
798 #endif | |
799 | |
800 ngx_mail_do_auth(s); | |
801 return; | |
802 } | |
803 | |
804 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
805 break; | |
806 | |
807 case NGX_POP3_CAPA: | |
808 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
809 size = cscf->pop3_capability.len; | |
810 text = cscf->pop3_capability.data; | |
811 break; | |
812 | |
813 case NGX_POP3_QUIT: | |
814 s->quit = 1; | |
815 break; | |
816 | |
817 case NGX_POP3_NOOP: | |
818 break; | |
819 | |
820 default: | |
821 s->mail_state = ngx_pop3_start; | |
822 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
823 break; | |
824 } | |
825 | |
826 break; | |
827 | |
828 /* suppress warinings */ | |
829 case ngx_pop3_passwd: | |
830 break; | |
831 | |
832 case ngx_pop3_auth_login_username: | |
833 arg = s->args.elts; | |
834 s->mail_state = ngx_pop3_auth_login_password; | |
835 | |
836 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
837 "pop3 auth login username: \"%V\"", &arg[0]); | |
838 | |
839 s->login.data = ngx_palloc(c->pool, | |
840 ngx_base64_decoded_length(arg[0].len)); | |
841 if (s->login.data == NULL){ | |
842 ngx_mail_session_internal_server_error(s); | |
843 return; | |
844 } | |
845 | |
846 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
847 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
848 "client sent invalid base64 encoding " | |
849 "in AUTH LOGIN command"); | |
850 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
851 break; | |
852 } | |
853 | |
854 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
855 "pop3 auth login username: \"%V\"", &s->login); | |
856 | |
857 size = sizeof(pop3_password) - 1; | |
858 text = pop3_password; | |
859 | |
860 break; | |
861 | |
862 case ngx_pop3_auth_login_password: | |
863 arg = s->args.elts; | |
864 | |
865 #if (NGX_DEBUG_MAIL_PASSWD) | |
866 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
867 "pop3 auth login password: \"%V\"", &arg[0]); | |
868 #endif | |
869 | |
870 s->passwd.data = ngx_palloc(c->pool, | |
871 ngx_base64_decoded_length(arg[0].len)); | |
872 if (s->passwd.data == NULL){ | |
873 ngx_mail_session_internal_server_error(s); | |
874 return; | |
875 } | |
876 | |
877 if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) { | |
878 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
879 "client sent invalid base64 encoding " | |
880 "in AUTH LOGIN command"); | |
881 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
882 break; | |
883 } | |
884 | |
885 #if (NGX_DEBUG_MAIL_PASSWD) | |
886 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
887 "pop3 auth login password: \"%V\"", &s->passwd); | |
888 #endif | |
889 | |
890 ngx_mail_do_auth(s); | |
891 return; | |
892 | |
893 case ngx_pop3_auth_plain: | |
894 arg = s->args.elts; | |
895 | |
896 rc = ngx_mail_decode_auth_plain(s, &arg[0]); | |
897 | |
898 if (rc == NGX_OK) { | |
899 ngx_mail_do_auth(s); | |
900 return; | |
901 } | |
902 | |
903 if (rc == NGX_ERROR) { | |
904 ngx_mail_session_internal_server_error(s); | |
905 return; | |
906 } | |
907 | |
908 /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
909 | |
910 break; | |
911 | |
912 case ngx_pop3_auth_cram_md5: | |
913 arg = s->args.elts; | |
914 | |
915 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
916 "pop3 auth cram-md5: \"%V\"", &arg[0]); | |
917 | |
918 s->login.data = ngx_palloc(c->pool, | |
919 ngx_base64_decoded_length(arg[0].len)); | |
920 if (s->login.data == NULL){ | |
921 ngx_mail_session_internal_server_error(s); | |
922 return; | |
923 } | |
924 | |
925 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
926 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
927 "client sent invalid base64 encoding " | |
928 "in AUTH CRAM-MD5 command"); | |
929 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
930 break; | |
931 } | |
932 | |
933 p = s->login.data; | |
934 last = p + s->login.len; | |
935 | |
936 while (p < last) { | |
937 if (*p++ == ' ') { | |
938 s->login.len = p - s->login.data - 1; | |
939 s->passwd.len = last - p; | |
940 s->passwd.data = p; | |
941 break; | |
942 } | |
943 } | |
944 | |
945 if (s->passwd.len != 32) { | |
946 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
947 "client sent invalid CRAM-MD5 hash " | |
948 "in AUTH CRAM-MD5 command"); | |
949 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
950 break; | |
951 } | |
952 | |
953 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
954 "pop3 auth cram-md5: \"%V\" \"%V\"", | |
955 &s->login, &s->passwd); | |
956 | |
957 s->auth_method = NGX_MAIL_AUTH_CRAM_MD5; | |
958 | |
959 ngx_mail_do_auth(s); | |
960 return; | |
961 } | |
962 } | |
963 | |
964 if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
965 s->mail_state = ngx_pop3_start; | |
966 s->state = 0; | |
967 text = pop3_invalid_command; | |
968 size = sizeof(pop3_invalid_command) - 1; | |
969 } | |
970 | |
971 s->args.nelts = 0; | |
972 s->buffer->pos = s->buffer->start; | |
973 s->buffer->last = s->buffer->start; | |
974 | |
975 if (s->state) { | |
976 s->arg_start = s->buffer->start; | |
977 } | |
978 | |
979 s->out.data = text; | |
980 s->out.len = size; | |
981 | |
982 ngx_mail_send(c->write); | |
983 } | |
984 | |
985 | |
986 void | |
987 ngx_imap_auth_state(ngx_event_t *rev) | |
988 { | |
989 u_char *p, *last, *text, *dst, *src, *end; | |
990 ssize_t text_len, last_len; | |
991 ngx_str_t *arg, salt; | |
992 ngx_int_t rc; | |
993 ngx_uint_t tag, i; | |
994 ngx_connection_t *c; | |
995 ngx_mail_session_t *s; | |
996 ngx_mail_core_srv_conf_t *cscf; | |
997 #if (NGX_MAIL_SSL) | |
998 ngx_mail_ssl_conf_t *sslcf; | |
999 #endif | |
1000 | |
1001 c = rev->data; | |
1002 s = c->data; | |
1003 | |
1004 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth state"); | |
1005 | |
1006 if (rev->timedout) { | |
1007 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
1008 c->timedout = 1; | |
1009 ngx_mail_close_connection(c); | |
1010 return; | |
1011 } | |
1012 | |
1013 if (s->out.len) { | |
1014 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap send handler busy"); | |
1015 s->blocked = 1; | |
1016 return; | |
1017 } | |
1018 | |
1019 s->blocked = 0; | |
1020 | |
1021 rc = ngx_mail_read_command(s); | |
1022 | |
1023 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
1024 return; | |
1025 } | |
1026 | |
1027 tag = 1; | |
1028 | |
1029 text = NULL; | |
1030 text_len = 0; | |
1031 | |
1032 last = imap_ok; | |
1033 last_len = sizeof(imap_ok) - 1; | |
1034 | |
1035 if (rc == NGX_OK) { | |
1036 | |
1037 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", | |
1038 s->command); | |
1039 | |
1040 if (s->backslash) { | |
1041 | |
1042 arg = s->args.elts; | |
1043 | |
1044 for (i = 0; i < s->args.nelts; i++) { | |
1045 dst = arg[i].data; | |
1046 end = dst + arg[i].len; | |
1047 | |
1048 for (src = dst; src < end; dst++) { | |
1049 *dst = *src; | |
1050 if (*src++ == '\\') { | |
1051 *dst = *src++; | |
1052 } | |
1053 } | |
1054 | |
1055 arg[i].len = dst - arg[i].data; | |
1056 } | |
1057 | |
1058 s->backslash = 0; | |
1059 } | |
1060 | |
1061 switch (s->mail_state) { | |
1062 | |
1063 case ngx_imap_start: | |
1064 | |
1065 switch (s->command) { | |
1066 | |
1067 case NGX_IMAP_LOGIN: | |
1068 | |
1069 #if (NGX_MAIL_SSL) | |
1070 | |
1071 if (c->ssl == NULL) { | |
1072 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
1073 | |
1074 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
1075 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1076 break; | |
1077 } | |
1078 } | |
1079 #endif | |
1080 | |
1081 arg = s->args.elts; | |
1082 | |
1083 if (s->args.nelts == 2 && arg[0].len) { | |
1084 | |
1085 s->login.len = arg[0].len; | |
1086 s->login.data = ngx_palloc(c->pool, s->login.len); | |
1087 if (s->login.data == NULL) { | |
1088 ngx_mail_session_internal_server_error(s); | |
1089 return; | |
1090 } | |
1091 | |
1092 ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
1093 | |
1094 s->passwd.len = arg[1].len; | |
1095 s->passwd.data = ngx_palloc(c->pool, s->passwd.len); | |
1096 if (s->passwd.data == NULL) { | |
1097 ngx_mail_session_internal_server_error(s); | |
1098 return; | |
1099 } | |
1100 | |
1101 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); | |
1102 | |
1103 #if (NGX_DEBUG_MAIL_PASSWD) | |
1104 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1105 "imap login:\"%V\" passwd:\"%V\"", | |
1106 &s->login, &s->passwd); | |
1107 #else | |
1108 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1109 "imap login:\"%V\"", &s->login); | |
1110 #endif | |
1111 | |
1112 ngx_mail_do_auth(s); | |
1113 return; | |
1114 } | |
1115 | |
1116 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1117 break; | |
1118 | |
1119 case NGX_IMAP_AUTHENTICATE: | |
1120 | |
1121 #if (NGX_MAIL_SSL) | |
1122 | |
1123 if (c->ssl == NULL) { | |
1124 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
1125 | |
1126 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
1127 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1128 break; | |
1129 } | |
1130 } | |
1131 #endif | |
1132 | |
1133 if (s->args.nelts != 1) { | |
1134 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1135 break; | |
1136 } | |
1137 | |
1138 arg = s->args.elts; | |
1139 | |
1140 if (arg[0].len == 5) { | |
1141 | |
1142 if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) | |
1143 == 0) | |
1144 { | |
1145 | |
1146 s->mail_state = ngx_imap_auth_login_username; | |
1147 | |
1148 last_len = sizeof(pop3_username) - 1; | |
1149 last = pop3_username; | |
1150 tag = 0; | |
1151 | |
1152 break; | |
1153 | |
1154 } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", | |
1155 5) | |
1156 == 0) | |
1157 { | |
1158 | |
1159 s->mail_state = ngx_imap_auth_plain; | |
1160 | |
1161 last_len = sizeof(pop3_next) - 1; | |
1162 last = pop3_next; | |
1163 tag = 0; | |
1164 | |
1165 break; | |
1166 } | |
1167 | |
1168 } else if (arg[0].len == 8 | |
1169 && ngx_strncasecmp(arg[0].data, | |
1170 (u_char *) "CRAM-MD5", 8) | |
1171 == 0) | |
1172 { | |
1173 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
1174 | |
1175 if (!(cscf->imap_auth_methods | |
1176 & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) | |
1177 || s->args.nelts != 1) | |
1178 { | |
1179 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1180 break; | |
1181 } | |
1182 | |
1183 s->mail_state = ngx_imap_auth_cram_md5; | |
1184 | |
1185 last = ngx_palloc(c->pool, | |
1186 sizeof("+ " CRLF) - 1 | |
1187 + ngx_base64_encoded_length(s->salt.len)); | |
1188 if (last == NULL) { | |
1189 ngx_mail_session_internal_server_error(s); | |
1190 return; | |
1191 } | |
1192 | |
1193 last[0] = '+'; last[1]= ' '; | |
1194 salt.data = &last[2]; | |
1195 s->salt.len -= 2; | |
1196 | |
1197 ngx_encode_base64(&salt, &s->salt); | |
1198 | |
1199 s->salt.len += 2; | |
1200 last_len = 2 + salt.len; | |
1201 last[last_len++] = CR; last[last_len++] = LF; | |
1202 tag = 0; | |
1203 | |
1204 break; | |
1205 } | |
1206 | |
1207 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1208 break; | |
1209 | |
1210 case NGX_IMAP_CAPABILITY: | |
1211 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
1212 | |
1213 #if (NGX_MAIL_SSL) | |
1214 | |
1215 if (c->ssl == NULL) { | |
1216 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
1217 | |
1218 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { | |
1219 text_len = cscf->imap_starttls_capability.len; | |
1220 text = cscf->imap_starttls_capability.data; | |
1221 break; | |
1222 } | |
1223 | |
1224 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
1225 text_len = cscf->imap_starttls_only_capability.len; | |
1226 text = cscf->imap_starttls_only_capability.data; | |
1227 break; | |
1228 } | |
1229 } | |
1230 #endif | |
1231 | |
1232 text_len = cscf->imap_capability.len; | |
1233 text = cscf->imap_capability.data; | |
1234 break; | |
1235 | |
1236 case NGX_IMAP_LOGOUT: | |
1237 s->quit = 1; | |
1238 text = imap_bye; | |
1239 text_len = sizeof(imap_bye) - 1; | |
1240 break; | |
1241 | |
1242 case NGX_IMAP_NOOP: | |
1243 break; | |
1244 | |
1245 #if (NGX_MAIL_SSL) | |
1246 | |
1247 case NGX_IMAP_STARTTLS: | |
1248 if (c->ssl == NULL) { | |
1249 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
1250 if (sslcf->starttls) { | |
1251 c->read->handler = ngx_mail_starttls_handler; | |
1252 break; | |
1253 } | |
1254 } | |
1255 | |
1256 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1257 break; | |
1258 #endif | |
1259 | |
1260 default: | |
1261 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1262 break; | |
1263 } | |
1264 | |
1265 break; | |
1266 | |
1267 case ngx_imap_auth_login_username: | |
1268 arg = s->args.elts; | |
1269 s->mail_state = ngx_imap_auth_login_password; | |
1270 | |
1271 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1272 "imap auth login username: \"%V\"", &arg[0]); | |
1273 | |
1274 s->login.data = ngx_palloc(c->pool, | |
1275 ngx_base64_decoded_length(arg[0].len)); | |
1276 if (s->login.data == NULL){ | |
1277 ngx_mail_session_internal_server_error(s); | |
1278 return; | |
1279 } | |
1280 | |
1281 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
1282 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1283 "client sent invalid base64 encoding " | |
1284 "in AUTH LOGIN command"); | |
1285 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1286 break; | |
1287 } | |
1288 | |
1289 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1290 "imap auth login username: \"%V\"", &s->login); | |
1291 | |
1292 last_len = sizeof(pop3_password) - 1; | |
1293 last = pop3_password; | |
1294 tag = 0; | |
1295 | |
1296 break; | |
1297 | |
1298 case ngx_imap_auth_login_password: | |
1299 arg = s->args.elts; | |
1300 | |
1301 #if (NGX_DEBUG_MAIL_PASSWD) | |
1302 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1303 "imap auth login password: \"%V\"", &arg[0]); | |
1304 #endif | |
1305 | |
1306 s->passwd.data = ngx_palloc(c->pool, | |
1307 ngx_base64_decoded_length(arg[0].len)); | |
1308 if (s->passwd.data == NULL){ | |
1309 ngx_mail_session_internal_server_error(s); | |
1310 return; | |
1311 } | |
1312 | |
1313 if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) { | |
1314 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1315 "client sent invalid base64 encoding " | |
1316 "in AUTH LOGIN command"); | |
1317 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1318 break; | |
1319 } | |
1320 | |
1321 #if (NGX_DEBUG_MAIL_PASSWD) | |
1322 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1323 "imap auth login password: \"%V\"", &s->passwd); | |
1324 #endif | |
1325 | |
1326 ngx_mail_do_auth(s); | |
1327 return; | |
1328 | |
1329 case ngx_imap_auth_plain: | |
1330 arg = s->args.elts; | |
1331 | |
1332 rc = ngx_mail_decode_auth_plain(s, &arg[0]); | |
1333 | |
1334 if (rc == NGX_OK) { | |
1335 ngx_mail_do_auth(s); | |
1336 return; | |
1337 } | |
1338 | |
1339 if (rc == NGX_ERROR) { | |
1340 ngx_mail_session_internal_server_error(s); | |
1341 return; | |
1342 } | |
1343 | |
1344 /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
1345 | |
1346 break; | |
1347 | |
1348 case ngx_imap_auth_cram_md5: | |
1349 arg = s->args.elts; | |
1350 | |
1351 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1352 "imap auth cram-md5: \"%V\"", &arg[0]); | |
1353 | |
1354 s->login.data = ngx_palloc(c->pool, | |
1355 ngx_base64_decoded_length(arg[0].len)); | |
1356 if (s->login.data == NULL){ | |
1357 ngx_mail_session_internal_server_error(s); | |
1358 return; | |
1359 } | |
1360 | |
1361 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
1362 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1363 "client sent invalid base64 encoding " | |
1364 "in AUTH CRAM-MD5 command"); | |
1365 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1366 break; | |
1367 } | |
1368 | |
1369 p = s->login.data; | |
1370 last = p + s->login.len; | |
1371 | |
1372 while (p < last) { | |
1373 if (*p++ == ' ') { | |
1374 s->login.len = p - s->login.data - 1; | |
1375 s->passwd.len = last - p; | |
1376 s->passwd.data = p; | |
1377 break; | |
1378 } | |
1379 } | |
1380 | |
1381 if (s->passwd.len != 32) { | |
1382 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1383 "client sent invalid CRAM-MD5 hash " | |
1384 "in AUTH CRAM-MD5 command"); | |
1385 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1386 break; | |
1387 } | |
1388 | |
1389 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1390 "imap auth cram-md5: \"%V\" \"%V\"", | |
1391 &s->login, &s->passwd); | |
1392 | |
1393 s->auth_method = NGX_MAIL_AUTH_CRAM_MD5; | |
1394 | |
1395 ngx_mail_do_auth(s); | |
1396 return; | |
1397 } | |
1398 | |
1399 } else if (rc == NGX_IMAP_NEXT) { | |
1400 last = imap_next; | |
1401 last_len = sizeof(imap_next) - 1; | |
1402 tag = 0; | |
1403 } | |
1404 | |
1405 if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
1406 s->mail_state = ngx_imap_start; | |
1407 s->state = 0; | |
1408 last = imap_invalid_command; | |
1409 last_len = sizeof(imap_invalid_command) - 1; | |
1410 } | |
1411 | |
1412 if (tag) { | |
1413 if (s->tag.len == 0) { | |
1414 s->tag.len = sizeof(imap_star) - 1; | |
1415 s->tag.data = (u_char *) imap_star; | |
1416 } | |
1417 | |
1418 if (s->tagged_line.len < s->tag.len + text_len + last_len) { | |
1419 s->tagged_line.len = s->tag.len + text_len + last_len; | |
1420 s->tagged_line.data = ngx_palloc(c->pool, s->tagged_line.len); | |
1421 if (s->tagged_line.data == NULL) { | |
1422 ngx_mail_close_connection(c); | |
1423 return; | |
1424 } | |
1425 } | |
1426 | |
1427 s->out.data = s->tagged_line.data; | |
1428 s->out.len = s->tag.len + text_len + last_len; | |
1429 | |
1430 p = s->out.data; | |
1431 | |
1432 if (text) { | |
1433 p = ngx_cpymem(p, text, text_len); | |
1434 } | |
1435 p = ngx_cpymem(p, s->tag.data, s->tag.len); | |
1436 ngx_memcpy(p, last, last_len); | |
1437 | |
1438 | |
1439 } else { | |
1440 s->out.data = last; | |
1441 s->out.len = last_len; | |
1442 } | |
1443 | |
1444 if (rc != NGX_IMAP_NEXT) { | |
1445 s->args.nelts = 0; | |
1446 | |
1447 if (s->state) { | |
1448 /* preserve tag */ | |
1449 s->arg_start = s->buffer->start + s->tag.len; | |
1450 s->buffer->pos = s->arg_start; | |
1451 s->buffer->last = s->arg_start; | |
1452 | |
1453 } else { | |
1454 s->buffer->pos = s->buffer->start; | |
1455 s->buffer->last = s->buffer->start; | |
1456 s->tag.len = 0; | |
1457 } | |
1458 } | |
1459 | |
1460 ngx_mail_send(c->write); | |
1461 } | |
1462 | |
1463 | |
1464 void | |
1465 ngx_smtp_auth_state(ngx_event_t *rev) | |
1466 { | |
1467 u_char *p, *last, *text, ch; | |
1468 ssize_t size; | |
1469 ngx_int_t rc; | |
1470 ngx_str_t *arg, salt, l; | |
1471 ngx_uint_t i; | |
1472 ngx_connection_t *c; | |
1473 ngx_mail_session_t *s; | |
1474 ngx_mail_core_srv_conf_t *cscf; | |
1475 #if (NGX_MAIL_SSL) | |
1476 ngx_mail_ssl_conf_t *sslcf; | |
1477 #endif | |
1478 | |
1479 c = rev->data; | |
1480 s = c->data; | |
1481 | |
1482 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp auth state"); | |
1483 | |
1484 if (rev->timedout) { | |
1485 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
1486 c->timedout = 1; | |
1487 ngx_mail_close_connection(c); | |
1488 return; | |
1489 } | |
1490 | |
1491 if (s->out.len) { | |
1492 ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp send handler busy"); | |
1493 s->blocked = 1; | |
1494 return; | |
1495 } | |
1496 | |
1497 s->blocked = 0; | |
1498 | |
1499 rc = ngx_mail_read_command(s); | |
1500 | |
1501 if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
1502 return; | |
1503 } | |
1504 | |
1505 text = NULL; | |
1506 size = 0; | |
1507 | |
1508 if (rc == NGX_OK) { | |
1509 switch (s->mail_state) { | |
1510 | |
1511 case ngx_smtp_start: | |
1512 | |
1513 switch (s->command) { | |
1514 | |
1515 case NGX_SMTP_HELO: | |
1516 case NGX_SMTP_EHLO: | |
1517 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
1518 | |
1519 if (s->args.nelts != 1) { | |
1520 text = smtp_invalid_argument; | |
1521 size = sizeof(smtp_invalid_argument) - 1; | |
1522 s->state = 0; | |
1523 break; | |
1524 } | |
1525 | |
1526 arg = s->args.elts; | |
1527 | |
1528 s->smtp_helo.len = arg[0].len; | |
1529 | |
1530 s->smtp_helo.data = ngx_palloc(c->pool, arg[0].len); | |
1531 if (s->smtp_helo.data == NULL) { | |
1532 ngx_mail_session_internal_server_error(s); | |
1533 return; | |
1534 } | |
1535 | |
1536 ngx_memcpy(s->smtp_helo.data, arg[0].data, arg[0].len); | |
1537 | |
1538 if (s->command == NGX_SMTP_HELO) { | |
1539 size = cscf->smtp_server_name.len; | |
1540 text = cscf->smtp_server_name.data; | |
1541 | |
1542 } else { | |
1543 s->esmtp = 1; | |
1544 | |
1545 #if (NGX_MAIL_SSL) | |
1546 | |
1547 if (c->ssl == NULL) { | |
1548 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
1549 | |
1550 if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { | |
1551 size = cscf->smtp_starttls_capability.len; | |
1552 text = cscf->smtp_starttls_capability.data; | |
1553 break; | |
1554 } | |
1555 | |
1556 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
1557 size = cscf->smtp_starttls_only_capability.len; | |
1558 text = cscf->smtp_starttls_only_capability.data; | |
1559 break; | |
1560 } | |
1561 } | |
1562 #endif | |
1563 | |
1564 size = cscf->smtp_capability.len; | |
1565 text = cscf->smtp_capability.data; | |
1566 } | |
1567 | |
1568 break; | |
1569 | |
1570 case NGX_SMTP_AUTH: | |
1571 | |
1572 #if (NGX_MAIL_SSL) | |
1573 | |
1574 if (c->ssl == NULL) { | |
1575 sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
1576 | |
1577 if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
1578 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1579 break; | |
1580 } | |
1581 } | |
1582 #endif | |
1583 | |
1584 if (s->args.nelts == 0) { | |
1585 text = smtp_invalid_argument; | |
1586 size = sizeof(smtp_invalid_argument) - 1; | |
1587 s->state = 0; | |
1588 break; | |
1589 } | |
1590 | |
1591 arg = s->args.elts; | |
1592 | |
1593 if (arg[0].len == 5) { | |
1594 | |
1595 if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) | |
1596 == 0) | |
1597 { | |
1598 | |
1599 if (s->args.nelts != 1) { | |
1600 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1601 break; | |
1602 } | |
1603 | |
1604 s->mail_state = ngx_smtp_auth_login_username; | |
1605 | |
1606 size = sizeof(smtp_username) - 1; | |
1607 text = smtp_username; | |
1608 | |
1609 break; | |
1610 | |
1611 } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", | |
1612 5) | |
1613 == 0) | |
1614 { | |
1615 if (s->args.nelts == 1) { | |
1616 s->mail_state = ngx_smtp_auth_plain; | |
1617 | |
1618 size = sizeof(smtp_next) - 1; | |
1619 text = smtp_next; | |
1620 | |
1621 break; | |
1622 } | |
1623 | |
1624 if (s->args.nelts == 2) { | |
1625 | |
1626 rc = ngx_mail_decode_auth_plain(s, &arg[1]); | |
1627 | |
1628 if (rc == NGX_OK) { | |
1629 ngx_mail_do_auth(s); | |
1630 return; | |
1631 } | |
1632 | |
1633 if (rc == NGX_ERROR) { | |
1634 ngx_mail_session_internal_server_error(s); | |
1635 return; | |
1636 } | |
1637 | |
1638 /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
1639 | |
1640 break; | |
1641 } | |
1642 | |
1643 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1644 break; | |
1645 } | |
1646 | |
1647 } else if (arg[0].len == 8 | |
1648 && ngx_strncasecmp(arg[0].data, | |
1649 (u_char *) "CRAM-MD5", 8) | |
1650 == 0) | |
1651 { | |
1652 cscf = ngx_mail_get_module_srv_conf(s, | |
1653 ngx_mail_core_module); | |
1654 | |
1655 if (!(cscf->smtp_auth_methods | |
1656 & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) | |
1657 || s->args.nelts != 1) | |
1658 { | |
1659 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1660 break; | |
1661 } | |
1662 | |
1663 s->mail_state = ngx_smtp_auth_cram_md5; | |
1664 | |
1665 text = ngx_palloc(c->pool, | |
1666 sizeof("334 " CRLF) - 1 | |
1667 + ngx_base64_encoded_length(s->salt.len)); | |
1668 if (text == NULL) { | |
1669 ngx_mail_session_internal_server_error(s); | |
1670 return; | |
1671 } | |
1672 | |
1673 text[0] = '3'; text[1]= '3'; text[2] = '4'; text[3]= ' '; | |
1674 salt.data = &text[4]; | |
1675 s->salt.len -= 2; | |
1676 | |
1677 ngx_encode_base64(&salt, &s->salt); | |
1678 | |
1679 s->salt.len += 2; | |
1680 size = 4 + salt.len; | |
1681 text[size++] = CR; text[size++] = LF; | |
1682 | |
1683 break; | |
1684 } | |
1685 | |
1686 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1687 break; | |
1688 | |
1689 case NGX_SMTP_QUIT: | |
1690 s->quit = 1; | |
1691 text = smtp_bye; | |
1692 size = sizeof(smtp_bye) - 1; | |
1693 break; | |
1694 | |
1695 case NGX_SMTP_MAIL: | |
1696 | |
1697 if (s->connection->log->log_level >= NGX_LOG_INFO) { | |
1698 l.len = s->buffer->last - s->buffer->start; | |
1699 l.data = s->buffer->start; | |
1700 | |
1701 for (i = 0; i < l.len; i++) { | |
1702 ch = l.data[i]; | |
1703 | |
1704 if (ch != CR && ch != LF) { | |
1705 continue; | |
1706 } | |
1707 | |
1708 l.data[i] = ' '; | |
1709 } | |
1710 | |
1711 while (i) { | |
1712 if (l.data[i - 1] != ' ') { | |
1713 break; | |
1714 } | |
1715 | |
1716 i--; | |
1717 } | |
1718 | |
1719 l.len = i; | |
1720 | |
1721 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
1722 "client was rejected: \"%V\"", &l); | |
1723 } | |
1724 | |
1725 text = smtp_auth_required; | |
1726 size = sizeof(smtp_auth_required) - 1; | |
1727 break; | |
1728 | |
1729 case NGX_SMTP_NOOP: | |
1730 case NGX_SMTP_RSET: | |
1731 text = smtp_ok; | |
1732 size = sizeof(smtp_ok) - 1; | |
1733 break; | |
1734 | |
1735 #if (NGX_MAIL_SSL) | |
1736 | |
1737 case NGX_SMTP_STARTTLS: | |
1738 if (c->ssl == NULL) { | |
1739 sslcf = ngx_mail_get_module_srv_conf(s, | |
1740 ngx_mail_ssl_module); | |
1741 if (sslcf->starttls) { | |
1742 c->read->handler = ngx_mail_starttls_handler; | |
1743 | |
1744 /* | |
1745 * RFC3207 requires us to discard any knowledge | |
1746 * obtained from client before STARTTLS. | |
1747 */ | |
1748 | |
1749 s->smtp_helo.len = 0; | |
1750 s->smtp_helo.data = NULL; | |
1751 | |
1752 text = smtp_ok; | |
1753 size = sizeof(smtp_ok) - 1; | |
1754 | |
1755 break; | |
1756 } | |
1757 } | |
1758 | |
1759 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1760 break; | |
1761 #endif | |
1762 | |
1763 default: | |
1764 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1765 break; | |
1766 } | |
1767 | |
1768 break; | |
1769 | |
1770 case ngx_smtp_auth_login_username: | |
1771 arg = s->args.elts; | |
1772 s->mail_state = ngx_smtp_auth_login_password; | |
1773 | |
1774 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1775 "smtp auth login username: \"%V\"", &arg[0]); | |
1776 | |
1777 s->login.data = ngx_palloc(c->pool, | |
1778 ngx_base64_decoded_length(arg[0].len)); | |
1779 if (s->login.data == NULL){ | |
1780 ngx_mail_session_internal_server_error(s); | |
1781 return; | |
1782 } | |
1783 | |
1784 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
1785 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1786 "client sent invalid base64 encoding " | |
1787 "in AUTH LOGIN command"); | |
1788 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1789 break; | |
1790 } | |
1791 | |
1792 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1793 "smtp auth login username: \"%V\"", &s->login); | |
1794 | |
1795 size = sizeof(smtp_password) - 1; | |
1796 text = smtp_password; | |
1797 | |
1798 break; | |
1799 | |
1800 case ngx_smtp_auth_login_password: | |
1801 arg = s->args.elts; | |
1802 | |
1803 #if (NGX_DEBUG_MAIL_PASSWD) | |
1804 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1805 "smtp auth login password: \"%V\"", &arg[0]); | |
1806 #endif | |
1807 | |
1808 s->passwd.data = ngx_palloc(c->pool, | |
1809 ngx_base64_decoded_length(arg[0].len)); | |
1810 if (s->passwd.data == NULL){ | |
1811 ngx_mail_session_internal_server_error(s); | |
1812 return; | |
1813 } | |
1814 | |
1815 if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) { | |
1816 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1817 "client sent invalid base64 encoding " | |
1818 "in AUTH LOGIN command"); | |
1819 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1820 break; | |
1821 } | |
1822 | |
1823 #if (NGX_DEBUG_MAIL_PASSWD) | |
1824 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1825 "smtp auth login password: \"%V\"", &s->passwd); | |
1826 #endif | |
1827 | |
1828 ngx_mail_do_auth(s); | |
1829 return; | |
1830 | |
1831 case ngx_smtp_auth_plain: | |
1832 arg = s->args.elts; | |
1833 | |
1834 rc = ngx_mail_decode_auth_plain(s, &arg[0]); | |
1835 | |
1836 if (rc == NGX_OK) { | |
1837 ngx_mail_do_auth(s); | |
1838 return; | |
1839 } | |
1840 | |
1841 if (rc == NGX_ERROR) { | |
1842 ngx_mail_session_internal_server_error(s); | |
1843 return; | |
1844 } | |
1845 | |
1846 /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
1847 | |
1848 break; | |
1849 | |
1850 case ngx_smtp_auth_cram_md5: | |
1851 arg = s->args.elts; | |
1852 | |
1853 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1854 "smtp auth cram-md5: \"%V\"", &arg[0]); | |
1855 | |
1856 s->login.data = ngx_palloc(c->pool, | |
1857 ngx_base64_decoded_length(arg[0].len)); | |
1858 if (s->login.data == NULL){ | |
1859 ngx_mail_session_internal_server_error(s); | |
1860 return; | |
1861 } | |
1862 | |
1863 if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
1864 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1865 "client sent invalid base64 encoding " | |
1866 "in AUTH CRAM-MD5 command"); | |
1867 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1868 break; | |
1869 } | |
1870 | |
1871 p = s->login.data; | |
1872 last = p + s->login.len; | |
1873 | |
1874 while (p < last) { | |
1875 if (*p++ == ' ') { | |
1876 s->login.len = p - s->login.data - 1; | |
1877 s->passwd.len = last - p; | |
1878 s->passwd.data = p; | |
1879 break; | |
1880 } | |
1881 } | |
1882 | |
1883 if (s->passwd.len != 32) { | |
1884 ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
1885 "client sent invalid CRAM-MD5 hash " | |
1886 "in AUTH CRAM-MD5 command"); | |
1887 rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
1888 break; | |
1889 } | |
1890 | |
1891 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
1892 "smtp auth cram-md5: \"%V\" \"%V\"", | |
1893 &s->login, &s->passwd); | |
1894 | |
1895 s->auth_method = NGX_MAIL_AUTH_CRAM_MD5; | |
1896 | |
1897 ngx_mail_do_auth(s); | |
1898 return; | |
1899 } | |
1900 } | |
1901 | |
1902 if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
1903 s->mail_state = ngx_smtp_start; | |
1904 s->state = 0; | |
1905 text = smtp_invalid_command; | |
1906 size = sizeof(smtp_invalid_command) - 1; | |
1907 } | |
1908 | |
1909 s->args.nelts = 0; | |
1910 s->buffer->pos = s->buffer->start; | |
1911 s->buffer->last = s->buffer->start; | |
1912 | |
1913 if (s->state) { | |
1914 s->arg_start = s->buffer->start; | |
1915 } | |
1916 | |
1917 s->out.data = text; | |
1918 s->out.len = size; | |
1919 | |
1920 ngx_mail_send(c->write); | |
1921 } | |
1922 | |
1923 | |
1924 static ngx_int_t | |
1925 ngx_mail_decode_auth_plain(ngx_mail_session_t *s, ngx_str_t *encoded) | |
1926 { | |
1927 u_char *p, *last; | |
1928 ngx_str_t plain; | |
1929 | |
1930 #if (NGX_DEBUG_MAIL_PASSWD) | |
1931 ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
1932 "mail auth plain: \"%V\"", encoded); | |
1933 #endif | |
1934 | |
1935 plain.data = ngx_palloc(s->connection->pool, | |
1936 ngx_base64_decoded_length(encoded->len)); | |
1937 if (plain.data == NULL){ | |
1938 return NGX_ERROR; | |
1939 } | |
1940 | |
1941 if (ngx_decode_base64(&plain, encoded) != NGX_OK) { | |
1942 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
1943 "client sent invalid base64 encoding " | |
1944 "in AUTH PLAIN command"); | |
1945 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
1946 } | |
1947 | |
1948 p = plain.data; | |
1949 last = p + plain.len; | |
1950 | |
1951 while (p < last && *p++) { /* void */ } | |
1952 | |
1953 if (p == last) { | |
1954 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
1955 "client sent invalid login in AUTH PLAIN command"); | |
1956 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
1957 } | |
1958 | |
1959 s->login.data = p; | |
1960 | |
1961 while (p < last && *p) { p++; } | |
1962 | |
1963 if (p == last) { | |
1964 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
1965 "client sent invalid password in AUTH PLAIN command"); | |
1966 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
1967 } | |
1968 | |
1969 s->login.len = p++ - s->login.data; | |
1970 | |
1971 s->passwd.len = last - p; | |
1972 s->passwd.data = p; | |
1973 | |
1974 #if (NGX_DEBUG_MAIL_PASSWD) | |
1975 ngx_log_debug2(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
1976 "mail auth plain: \"%V\" \"%V\"", | |
1977 &s->login, &s->passwd); | |
1978 #endif | |
1979 | |
1980 return NGX_OK; | |
1981 } | |
1982 | |
1983 | |
1984 static void | |
1985 ngx_mail_do_auth(ngx_mail_session_t *s) | |
1986 { | 606 { |
1987 s->args.nelts = 0; | 607 s->args.nelts = 0; |
1988 s->buffer->pos = s->buffer->start; | 608 s->buffer->pos = s->buffer->start; |
1989 s->buffer->last = s->buffer->start; | 609 s->buffer->last = s->buffer->start; |
1990 s->state = 0; | 610 s->state = 0; |
1991 | 611 |
1992 if (s->connection->read->timer_set) { | 612 if (c->read->timer_set) { |
1993 ngx_del_timer(s->connection->read); | 613 ngx_del_timer(c->read); |
1994 } | 614 } |
1995 | 615 |
1996 s->login_attempt++; | 616 s->login_attempt++; |
1997 | 617 |
1998 ngx_mail_auth_http_init(s); | 618 ngx_mail_auth_http_init(s); |
1999 } | |
2000 | |
2001 | |
2002 static ngx_int_t | |
2003 ngx_mail_read_command(ngx_mail_session_t *s) | |
2004 { | |
2005 ssize_t n; | |
2006 ngx_int_t rc; | |
2007 ngx_str_t l; | |
2008 | |
2009 n = s->connection->recv(s->connection, s->buffer->last, | |
2010 s->buffer->end - s->buffer->last); | |
2011 | |
2012 if (n == NGX_ERROR || n == 0) { | |
2013 ngx_mail_close_connection(s->connection); | |
2014 return NGX_ERROR; | |
2015 } | |
2016 | |
2017 if (n > 0) { | |
2018 s->buffer->last += n; | |
2019 } | |
2020 | |
2021 if (n == NGX_AGAIN) { | |
2022 if (ngx_handle_read_event(s->connection->read, 0) == NGX_ERROR) { | |
2023 ngx_mail_session_internal_server_error(s); | |
2024 return NGX_ERROR; | |
2025 } | |
2026 | |
2027 return NGX_AGAIN; | |
2028 } | |
2029 | |
2030 switch (s->protocol) { | |
2031 case NGX_MAIL_POP3_PROTOCOL: | |
2032 rc = ngx_pop3_parse_command(s); | |
2033 break; | |
2034 | |
2035 case NGX_MAIL_IMAP_PROTOCOL: | |
2036 rc = ngx_imap_parse_command(s); | |
2037 break; | |
2038 | |
2039 default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
2040 rc = ngx_smtp_parse_command(s); | |
2041 break; | |
2042 } | |
2043 | |
2044 if (rc == NGX_AGAIN) { | |
2045 | |
2046 if (s->buffer->last < s->buffer->end) { | |
2047 return rc; | |
2048 } | |
2049 | |
2050 l.len = s->buffer->last - s->buffer->start; | |
2051 l.data = s->buffer->start; | |
2052 | |
2053 ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
2054 "client sent too long command \"%V\"", &l); | |
2055 | |
2056 s->quit = 1; | |
2057 | |
2058 return NGX_MAIL_PARSE_INVALID_COMMAND; | |
2059 } | |
2060 | |
2061 if (rc == NGX_IMAP_NEXT || rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
2062 return rc; | |
2063 } | |
2064 | |
2065 if (rc == NGX_ERROR) { | |
2066 ngx_mail_close_connection(s->connection); | |
2067 return NGX_ERROR; | |
2068 } | |
2069 | |
2070 return NGX_OK; | |
2071 } | 619 } |
2072 | 620 |
2073 | 621 |
2074 void | 622 void |
2075 ngx_mail_session_internal_server_error(ngx_mail_session_t *s) | 623 ngx_mail_session_internal_server_error(ngx_mail_session_t *s) |
2076 { | 624 { |
2077 s->out = internal_server_errors[s->protocol]; | 625 ngx_mail_core_srv_conf_t *cscf; |
626 | |
627 cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
628 | |
629 s->out = cscf->protocol->internal_server_error; | |
2078 s->quit = 1; | 630 s->quit = 1; |
2079 | 631 |
2080 ngx_mail_send(s->connection->write); | 632 ngx_mail_send(s->connection->write); |
2081 } | 633 } |
2082 | 634 |
2098 } | 650 } |
2099 } | 651 } |
2100 | 652 |
2101 #endif | 653 #endif |
2102 | 654 |
655 #if (NGX_STAT_STUB) | |
656 ngx_atomic_fetch_add(ngx_stat_active, -1); | |
657 #endif | |
658 | |
2103 c->destroyed = 1; | 659 c->destroyed = 1; |
2104 | 660 |
2105 pool = c->pool; | 661 pool = c->pool; |
2106 | 662 |
2107 ngx_close_connection(c); | 663 ngx_close_connection(c); |
2108 | 664 |
2109 ngx_destroy_pool(pool); | 665 ngx_destroy_pool(pool); |
2110 } | 666 } |
2111 | 667 |
2112 | 668 |
2113 static u_char * | 669 u_char * |
2114 ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len) | 670 ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len) |
2115 { | 671 { |
2116 u_char *p; | 672 u_char *p; |
2117 ngx_mail_session_t *s; | 673 ngx_mail_session_t *s; |
2118 ngx_mail_log_ctx_t *ctx; | 674 ngx_mail_log_ctx_t *ctx; |
2133 | 689 |
2134 if (s == NULL) { | 690 if (s == NULL) { |
2135 return p; | 691 return p; |
2136 } | 692 } |
2137 | 693 |
2138 p = ngx_snprintf(buf, len, ", server: %V", s->addr_text); | 694 p = ngx_snprintf(buf, len, "%s, server: %V", |
695 s->starttls ? " using starttls" : "", | |
696 s->addr_text); | |
2139 len -= p - buf; | 697 len -= p - buf; |
2140 buf = p; | 698 buf = p; |
2141 | 699 |
2142 if (s->login.len == 0) { | 700 if (s->login.len == 0) { |
2143 return p; | 701 return p; |