|
290
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #include <ngx_config.h>
|
|
|
8 #include <ngx_core.h>
|
|
|
9 #include <ngx_mail.h>
|
|
|
10
|
|
|
11
|
|
536
|
12 #define NGX_DEFAULT_CIPHERS "HIGH:!ADH:!MD5"
|
|
290
|
13
|
|
|
14
|
|
|
15 static void *ngx_mail_ssl_create_conf(ngx_conf_t *cf);
|
|
|
16 static char *ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child);
|
|
404
|
17
|
|
|
18 static char *ngx_mail_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
19 void *conf);
|
|
|
20 static char *ngx_mail_ssl_starttls(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
21 void *conf);
|
|
290
|
22 static char *ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
23 void *conf);
|
|
|
24
|
|
|
25
|
|
|
26 static ngx_conf_enum_t ngx_http_starttls_state[] = {
|
|
|
27 { ngx_string("off"), NGX_MAIL_STARTTLS_OFF },
|
|
|
28 { ngx_string("on"), NGX_MAIL_STARTTLS_ON },
|
|
|
29 { ngx_string("only"), NGX_MAIL_STARTTLS_ONLY },
|
|
|
30 { ngx_null_string, 0 }
|
|
|
31 };
|
|
|
32
|
|
|
33
|
|
|
34
|
|
|
35 static ngx_conf_bitmask_t ngx_mail_ssl_protocols[] = {
|
|
|
36 { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
|
|
|
37 { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
|
|
|
38 { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
|
|
|
39 { ngx_null_string, 0 }
|
|
|
40 };
|
|
|
41
|
|
|
42
|
|
|
43 static ngx_command_t ngx_mail_ssl_commands[] = {
|
|
|
44
|
|
|
45 { ngx_string("ssl"),
|
|
|
46 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
|
|
404
|
47 ngx_mail_ssl_enable,
|
|
290
|
48 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
49 offsetof(ngx_mail_ssl_conf_t, enable),
|
|
|
50 NULL },
|
|
|
51
|
|
|
52 { ngx_string("starttls"),
|
|
|
53 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
404
|
54 ngx_mail_ssl_starttls,
|
|
290
|
55 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
56 offsetof(ngx_mail_ssl_conf_t, starttls),
|
|
|
57 ngx_http_starttls_state },
|
|
|
58
|
|
|
59 { ngx_string("ssl_certificate"),
|
|
|
60 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
|
61 ngx_conf_set_str_slot,
|
|
|
62 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
63 offsetof(ngx_mail_ssl_conf_t, certificate),
|
|
|
64 NULL },
|
|
|
65
|
|
|
66 { ngx_string("ssl_certificate_key"),
|
|
|
67 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
|
68 ngx_conf_set_str_slot,
|
|
|
69 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
70 offsetof(ngx_mail_ssl_conf_t, certificate_key),
|
|
|
71 NULL },
|
|
|
72
|
|
380
|
73 { ngx_string("ssl_dhparam"),
|
|
|
74 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
|
75 ngx_conf_set_str_slot,
|
|
|
76 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
77 offsetof(ngx_mail_ssl_conf_t, dhparam),
|
|
|
78 NULL },
|
|
|
79
|
|
290
|
80 { ngx_string("ssl_protocols"),
|
|
|
81 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
|
|
|
82 ngx_conf_set_bitmask_slot,
|
|
|
83 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
84 offsetof(ngx_mail_ssl_conf_t, protocols),
|
|
|
85 &ngx_mail_ssl_protocols },
|
|
|
86
|
|
|
87 { ngx_string("ssl_ciphers"),
|
|
|
88 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
|
89 ngx_conf_set_str_slot,
|
|
|
90 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
91 offsetof(ngx_mail_ssl_conf_t, ciphers),
|
|
|
92 NULL },
|
|
|
93
|
|
|
94 { ngx_string("ssl_prefer_server_ciphers"),
|
|
|
95 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
|
|
|
96 ngx_conf_set_flag_slot,
|
|
|
97 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
98 offsetof(ngx_mail_ssl_conf_t, prefer_server_ciphers),
|
|
|
99 NULL },
|
|
|
100
|
|
|
101 { ngx_string("ssl_session_cache"),
|
|
|
102 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12,
|
|
|
103 ngx_mail_ssl_session_cache,
|
|
|
104 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
105 0,
|
|
|
106 NULL },
|
|
|
107
|
|
|
108 { ngx_string("ssl_session_timeout"),
|
|
|
109 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
|
110 ngx_conf_set_sec_slot,
|
|
|
111 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
112 offsetof(ngx_mail_ssl_conf_t, session_timeout),
|
|
|
113 NULL },
|
|
|
114
|
|
|
115 ngx_null_command
|
|
|
116 };
|
|
|
117
|
|
|
118
|
|
|
119 static ngx_mail_module_t ngx_mail_ssl_module_ctx = {
|
|
336
|
120 NULL, /* protocol */
|
|
|
121
|
|
290
|
122 NULL, /* create main configuration */
|
|
|
123 NULL, /* init main configuration */
|
|
|
124
|
|
|
125 ngx_mail_ssl_create_conf, /* create server configuration */
|
|
|
126 ngx_mail_ssl_merge_conf /* merge server configuration */
|
|
|
127 };
|
|
|
128
|
|
|
129
|
|
|
130 ngx_module_t ngx_mail_ssl_module = {
|
|
|
131 NGX_MODULE_V1,
|
|
|
132 &ngx_mail_ssl_module_ctx, /* module context */
|
|
|
133 ngx_mail_ssl_commands, /* module directives */
|
|
|
134 NGX_MAIL_MODULE, /* module type */
|
|
|
135 NULL, /* init master */
|
|
|
136 NULL, /* init module */
|
|
|
137 NULL, /* init process */
|
|
|
138 NULL, /* init thread */
|
|
|
139 NULL, /* exit thread */
|
|
|
140 NULL, /* exit process */
|
|
|
141 NULL, /* exit master */
|
|
|
142 NGX_MODULE_V1_PADDING
|
|
|
143 };
|
|
|
144
|
|
|
145
|
|
|
146 static ngx_str_t ngx_mail_ssl_sess_id_ctx = ngx_string("MAIL");
|
|
|
147
|
|
|
148
|
|
|
149 static void *
|
|
|
150 ngx_mail_ssl_create_conf(ngx_conf_t *cf)
|
|
|
151 {
|
|
|
152 ngx_mail_ssl_conf_t *scf;
|
|
|
153
|
|
|
154 scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t));
|
|
|
155 if (scf == NULL) {
|
|
496
|
156 return NULL;
|
|
290
|
157 }
|
|
|
158
|
|
|
159 /*
|
|
|
160 * set by ngx_pcalloc():
|
|
|
161 *
|
|
|
162 * scf->protocols = 0;
|
|
380
|
163 * scf->certificate = { 0, NULL };
|
|
|
164 * scf->certificate_key = { 0, NULL };
|
|
|
165 * scf->dhparam = { 0, NULL };
|
|
290
|
166 * scf->ciphers.len = 0;
|
|
|
167 * scf->ciphers.data = NULL;
|
|
|
168 * scf->shm_zone = NULL;
|
|
|
169 */
|
|
|
170
|
|
|
171 scf->enable = NGX_CONF_UNSET;
|
|
482
|
172 scf->starttls = NGX_CONF_UNSET_UINT;
|
|
290
|
173 scf->prefer_server_ciphers = NGX_CONF_UNSET;
|
|
|
174 scf->builtin_session_cache = NGX_CONF_UNSET;
|
|
|
175 scf->session_timeout = NGX_CONF_UNSET;
|
|
|
176
|
|
|
177 return scf;
|
|
|
178 }
|
|
|
179
|
|
|
180
|
|
|
181 static char *
|
|
|
182 ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
183 {
|
|
|
184 ngx_mail_ssl_conf_t *prev = parent;
|
|
|
185 ngx_mail_ssl_conf_t *conf = child;
|
|
|
186
|
|
404
|
187 char *mode;
|
|
290
|
188 ngx_pool_cleanup_t *cln;
|
|
|
189
|
|
|
190 ngx_conf_merge_value(conf->enable, prev->enable, 0);
|
|
404
|
191 ngx_conf_merge_uint_value(conf->starttls, prev->starttls,
|
|
|
192 NGX_MAIL_STARTTLS_OFF);
|
|
290
|
193
|
|
|
194 ngx_conf_merge_value(conf->session_timeout,
|
|
|
195 prev->session_timeout, 300);
|
|
|
196
|
|
|
197 ngx_conf_merge_value(conf->prefer_server_ciphers,
|
|
|
198 prev->prefer_server_ciphers, 0);
|
|
|
199
|
|
|
200 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
|
|
534
|
201 (NGX_CONF_BITMASK_SET|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
|
|
290
|
202
|
|
404
|
203 ngx_conf_merge_str_value(conf->certificate, prev->certificate, "");
|
|
|
204 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, "");
|
|
290
|
205
|
|
380
|
206 ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, "");
|
|
|
207
|
|
390
|
208 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS);
|
|
290
|
209
|
|
|
210
|
|
|
211 conf->ssl.log = cf->log;
|
|
|
212
|
|
404
|
213 if (conf->enable) {
|
|
|
214 mode = "ssl";
|
|
|
215
|
|
|
216 } else if (conf->starttls != NGX_MAIL_STARTTLS_OFF) {
|
|
|
217 mode = "starttls";
|
|
|
218
|
|
|
219 } else {
|
|
|
220 mode = "";
|
|
|
221 }
|
|
|
222
|
|
|
223 if (*mode) {
|
|
|
224
|
|
|
225 if (conf->certificate.len == 0) {
|
|
|
226 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
|
|
|
227 "no \"ssl_certificate\" is defined for "
|
|
|
228 "the \"%s\" directive in %s:%ui",
|
|
|
229 mode, conf->file, conf->line);
|
|
|
230 return NGX_CONF_ERROR;
|
|
|
231 }
|
|
|
232
|
|
|
233 if (conf->certificate_key.len == 0) {
|
|
|
234 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
|
|
|
235 "no \"ssl_certificate_key\" is defined for "
|
|
|
236 "the \"%s\" directive in %s:%ui",
|
|
|
237 mode, conf->file, conf->line);
|
|
|
238 return NGX_CONF_ERROR;
|
|
|
239 }
|
|
|
240
|
|
|
241 } else {
|
|
|
242
|
|
|
243 if (conf->certificate.len == 0) {
|
|
|
244 return NGX_CONF_OK;
|
|
|
245 }
|
|
|
246
|
|
|
247 if (conf->certificate_key.len == 0) {
|
|
|
248 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
|
|
|
249 "no \"ssl_certificate_key\" is defined "
|
|
|
250 "for certificate \"%V\"",
|
|
|
251 &conf->certificate);
|
|
|
252 return NGX_CONF_ERROR;
|
|
|
253 }
|
|
|
254 }
|
|
|
255
|
|
290
|
256 if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) {
|
|
|
257 return NGX_CONF_ERROR;
|
|
|
258 }
|
|
|
259
|
|
|
260 cln = ngx_pool_cleanup_add(cf->pool, 0);
|
|
|
261 if (cln == NULL) {
|
|
|
262 return NGX_CONF_ERROR;
|
|
|
263 }
|
|
|
264
|
|
|
265 cln->handler = ngx_ssl_cleanup_ctx;
|
|
|
266 cln->data = &conf->ssl;
|
|
|
267
|
|
|
268 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
|
|
|
269 &conf->certificate_key)
|
|
|
270 != NGX_OK)
|
|
|
271 {
|
|
|
272 return NGX_CONF_ERROR;
|
|
|
273 }
|
|
|
274
|
|
|
275 if (conf->ciphers.len) {
|
|
|
276 if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
|
|
|
277 (const char *) conf->ciphers.data)
|
|
|
278 == 0)
|
|
|
279 {
|
|
|
280 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
|
|
|
281 "SSL_CTX_set_cipher_list(\"%V\") failed",
|
|
|
282 &conf->ciphers);
|
|
|
283 }
|
|
|
284 }
|
|
|
285
|
|
|
286 if (conf->prefer_server_ciphers) {
|
|
|
287 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
|
|
|
288 }
|
|
|
289
|
|
|
290 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
|
|
|
291 return NGX_CONF_ERROR;
|
|
|
292 }
|
|
|
293
|
|
380
|
294 if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) {
|
|
|
295 return NGX_CONF_ERROR;
|
|
|
296 }
|
|
|
297
|
|
290
|
298 ngx_conf_merge_value(conf->builtin_session_cache,
|
|
378
|
299 prev->builtin_session_cache, NGX_SSL_NONE_SCACHE);
|
|
290
|
300
|
|
|
301 if (conf->shm_zone == NULL) {
|
|
|
302 conf->shm_zone = prev->shm_zone;
|
|
|
303 }
|
|
|
304
|
|
|
305 if (ngx_ssl_session_cache(&conf->ssl, &ngx_mail_ssl_sess_id_ctx,
|
|
|
306 conf->builtin_session_cache,
|
|
|
307 conf->shm_zone, conf->session_timeout)
|
|
|
308 != NGX_OK)
|
|
|
309 {
|
|
|
310 return NGX_CONF_ERROR;
|
|
|
311 }
|
|
|
312
|
|
|
313 return NGX_CONF_OK;
|
|
|
314 }
|
|
|
315
|
|
|
316
|
|
|
317 static char *
|
|
404
|
318 ngx_mail_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
319 {
|
|
|
320 ngx_mail_ssl_conf_t *scf = conf;
|
|
|
321
|
|
|
322 char *rv;
|
|
|
323
|
|
|
324 rv = ngx_conf_set_flag_slot(cf, cmd, conf);
|
|
|
325
|
|
|
326 if (rv != NGX_CONF_OK) {
|
|
|
327 return rv;
|
|
|
328 }
|
|
|
329
|
|
|
330 if (scf->enable && (ngx_int_t) scf->starttls > NGX_MAIL_STARTTLS_OFF) {
|
|
|
331 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
|
332 "\"starttls\" directive conflicts with \"ssl on\"");
|
|
|
333 return NGX_CONF_ERROR;
|
|
|
334 }
|
|
|
335
|
|
|
336 scf->file = cf->conf_file->file.name.data;
|
|
|
337 scf->line = cf->conf_file->line;
|
|
|
338
|
|
|
339 return NGX_CONF_OK;
|
|
|
340 }
|
|
|
341
|
|
|
342
|
|
|
343 static char *
|
|
|
344 ngx_mail_ssl_starttls(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
345 {
|
|
|
346 ngx_mail_ssl_conf_t *scf = conf;
|
|
|
347
|
|
|
348 char *rv;
|
|
|
349
|
|
|
350 rv = ngx_conf_set_enum_slot(cf, cmd, conf);
|
|
|
351
|
|
|
352 if (rv != NGX_CONF_OK) {
|
|
|
353 return rv;
|
|
|
354 }
|
|
|
355
|
|
|
356 if (scf->enable == 1 && (ngx_int_t) scf->starttls > NGX_MAIL_STARTTLS_OFF) {
|
|
|
357 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
|
358 "\"ssl\" directive conflicts with \"starttls\"");
|
|
|
359 return NGX_CONF_ERROR;
|
|
|
360 }
|
|
|
361
|
|
|
362 scf->file = cf->conf_file->file.name.data;
|
|
|
363 scf->line = cf->conf_file->line;
|
|
|
364
|
|
|
365 return NGX_CONF_OK;
|
|
|
366 }
|
|
|
367
|
|
|
368
|
|
|
369 static char *
|
|
290
|
370 ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
371 {
|
|
|
372 ngx_mail_ssl_conf_t *scf = conf;
|
|
|
373
|
|
|
374 size_t len;
|
|
|
375 ngx_str_t *value, name, size;
|
|
|
376 ngx_int_t n;
|
|
|
377 ngx_uint_t i, j;
|
|
|
378
|
|
|
379 value = cf->args->elts;
|
|
|
380
|
|
|
381 for (i = 1; i < cf->args->nelts; i++) {
|
|
|
382
|
|
358
|
383 if (ngx_strcmp(value[i].data, "off") == 0) {
|
|
|
384 scf->builtin_session_cache = NGX_SSL_NO_SCACHE;
|
|
|
385 continue;
|
|
|
386 }
|
|
|
387
|
|
378
|
388 if (ngx_strcmp(value[i].data, "none") == 0) {
|
|
|
389 scf->builtin_session_cache = NGX_SSL_NONE_SCACHE;
|
|
|
390 continue;
|
|
|
391 }
|
|
|
392
|
|
290
|
393 if (ngx_strcmp(value[i].data, "builtin") == 0) {
|
|
|
394 scf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE;
|
|
|
395 continue;
|
|
|
396 }
|
|
|
397
|
|
|
398 if (value[i].len > sizeof("builtin:") - 1
|
|
|
399 && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1)
|
|
|
400 == 0)
|
|
|
401 {
|
|
|
402 n = ngx_atoi(value[i].data + sizeof("builtin:") - 1,
|
|
|
403 value[i].len - (sizeof("builtin:") - 1));
|
|
|
404
|
|
|
405 if (n == NGX_ERROR) {
|
|
|
406 goto invalid;
|
|
|
407 }
|
|
|
408
|
|
|
409 scf->builtin_session_cache = n;
|
|
|
410
|
|
|
411 continue;
|
|
|
412 }
|
|
|
413
|
|
|
414 if (value[i].len > sizeof("shared:") - 1
|
|
|
415 && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1)
|
|
|
416 == 0)
|
|
|
417 {
|
|
|
418 len = 0;
|
|
|
419
|
|
|
420 for (j = sizeof("shared:") - 1; j < value[i].len; j++) {
|
|
|
421 if (value[i].data[j] == ':') {
|
|
|
422 break;
|
|
|
423 }
|
|
|
424
|
|
|
425 len++;
|
|
|
426 }
|
|
|
427
|
|
|
428 if (len == 0) {
|
|
|
429 goto invalid;
|
|
|
430 }
|
|
|
431
|
|
|
432 name.len = len;
|
|
|
433 name.data = value[i].data + sizeof("shared:") - 1;
|
|
|
434
|
|
|
435 size.len = value[i].len - j - 1;
|
|
|
436 size.data = name.data + len + 1;
|
|
|
437
|
|
|
438 n = ngx_parse_size(&size);
|
|
|
439
|
|
|
440 if (n == NGX_ERROR) {
|
|
|
441 goto invalid;
|
|
|
442 }
|
|
|
443
|
|
|
444 if (n < (ngx_int_t) (8 * ngx_pagesize)) {
|
|
|
445 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
446 "session cache \"%V\" is too small",
|
|
|
447 &value[i]);
|
|
|
448
|
|
|
449 return NGX_CONF_ERROR;
|
|
|
450 }
|
|
|
451
|
|
|
452 scf->shm_zone = ngx_shared_memory_add(cf, &name, n,
|
|
|
453 &ngx_mail_ssl_module);
|
|
|
454 if (scf->shm_zone == NULL) {
|
|
|
455 return NGX_CONF_ERROR;
|
|
|
456 }
|
|
|
457
|
|
|
458 continue;
|
|
|
459 }
|
|
|
460
|
|
|
461 goto invalid;
|
|
|
462 }
|
|
|
463
|
|
|
464 if (scf->shm_zone && scf->builtin_session_cache == NGX_CONF_UNSET) {
|
|
|
465 scf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE;
|
|
|
466 }
|
|
|
467
|
|
|
468 return NGX_CONF_OK;
|
|
|
469
|
|
|
470 invalid:
|
|
|
471
|
|
|
472 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
473 "invalid session cache \"%V\"", &value[i]);
|
|
|
474
|
|
|
475 return NGX_CONF_ERROR;
|
|
|
476 }
|
