Mercurial > hg > nginx
annotate src/http/modules/ngx_http_ssl_module.c @ 669:562806624c4a release-0.3.56
nginx-0.3.56-RELEASE import
*) Feature: the "dav_access" directive.
*) Feature: the "if" directive supports the "-d", "!-d", "-e", "!-e",
"-x", and "!-x" operators.
*) Bugfix: a segmentation fault occurred if a request returned a
redirect and some sent to client header lines were logged in the
access log.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 04 Aug 2006 16:04:04 +0000 |
parents | 63a820b0bc6c |
children | cec32b3753ac |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_http.h> |
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10 |
573 | 11 |
611 | 12 typedef u_char *(*ngx_ssl_variable_handler_pt)(ngx_connection_t *); |
13 | |
14 | |
383
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15 #define NGX_DEFLAUT_CERTIFICATE "cert.pem" |
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16 #define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem" |
547 | 17 #define NGX_DEFLAUT_CIPHERS "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP" |
383
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18 |
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19 |
669 | 20 static int ngx_http_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store); |
611 | 21 static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r, |
22 ngx_http_variable_value_t *v, uintptr_t data); | |
647 | 23 static ngx_int_t ngx_http_ssl_client_s_dn(ngx_http_request_t *r, |
24 ngx_http_variable_value_t *v, uintptr_t data); | |
25 static ngx_int_t ngx_http_ssl_client_i_dn(ngx_http_request_t *r, | |
26 ngx_http_variable_value_t *v, uintptr_t data); | |
611 | 27 |
28 static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf); | |
383
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29 static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf); |
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30 static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, |
501 | 31 void *parent, void *child); |
383
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32 |
563 | 33 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
34 | |
35 static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, | |
36 void *conf); | |
37 | |
38 static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher"; | |
39 | |
40 #endif | |
41 | |
383
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42 |
547 | 43 static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = { |
44 { ngx_string("SSLv2"), NGX_SSL_SSLv2 }, | |
45 { ngx_string("SSLv3"), NGX_SSL_SSLv3 }, | |
46 { ngx_string("TLSv1"), NGX_SSL_TLSv1 }, | |
47 { ngx_null_string, 0 } | |
48 }; | |
49 | |
50 | |
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51 static ngx_command_t ngx_http_ssl_commands[] = { |
383
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52 |
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53 { ngx_string("ssl"), |
599 | 54 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
383
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55 ngx_conf_set_flag_slot, |
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56 NGX_HTTP_SRV_CONF_OFFSET, |
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57 offsetof(ngx_http_ssl_srv_conf_t, enable), |
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58 NULL }, |
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59 |
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60 { ngx_string("ssl_certificate"), |
599 | 61 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
383
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62 ngx_conf_set_str_slot, |
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63 NGX_HTTP_SRV_CONF_OFFSET, |
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64 offsetof(ngx_http_ssl_srv_conf_t, certificate), |
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65 NULL }, |
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66 |
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67 { ngx_string("ssl_certificate_key"), |
599 | 68 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
383
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69 ngx_conf_set_str_slot, |
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70 NGX_HTTP_SRV_CONF_OFFSET, |
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71 offsetof(ngx_http_ssl_srv_conf_t, certificate_key), |
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72 NULL }, |
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73 |
547 | 74 { ngx_string("ssl_protocols"), |
563 | 75 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE, |
547 | 76 ngx_conf_set_bitmask_slot, |
77 NGX_HTTP_SRV_CONF_OFFSET, | |
78 offsetof(ngx_http_ssl_srv_conf_t, protocols), | |
79 &ngx_http_ssl_protocols }, | |
80 | |
479 | 81 { ngx_string("ssl_ciphers"), |
563 | 82 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
479 | 83 ngx_conf_set_str_slot, |
84 NGX_HTTP_SRV_CONF_OFFSET, | |
85 offsetof(ngx_http_ssl_srv_conf_t, ciphers), | |
86 NULL }, | |
87 | |
647 | 88 { ngx_string("ssl_verify_client"), |
667 | 89 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
647 | 90 ngx_conf_set_flag_slot, |
91 NGX_HTTP_SRV_CONF_OFFSET, | |
92 offsetof(ngx_http_ssl_srv_conf_t, verify), | |
93 NULL }, | |
94 | |
95 { ngx_string("ssl_verify_depth"), | |
96 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE, | |
97 ngx_conf_set_num_slot, | |
98 NGX_HTTP_SRV_CONF_OFFSET, | |
99 offsetof(ngx_http_ssl_srv_conf_t, verify_depth), | |
100 NULL }, | |
101 | |
102 { ngx_string("ssl_client_certificate"), | |
103 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, | |
104 ngx_conf_set_str_slot, | |
105 NGX_HTTP_SRV_CONF_OFFSET, | |
106 offsetof(ngx_http_ssl_srv_conf_t, client_certificate), | |
107 NULL }, | |
108 | |
547 | 109 { ngx_string("ssl_prefer_server_ciphers"), |
110 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, | |
563 | 111 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
547 | 112 ngx_conf_set_flag_slot, |
113 NGX_HTTP_SRV_CONF_OFFSET, | |
114 offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers), | |
115 NULL }, | |
563 | 116 #else |
117 ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 }, | |
118 #endif | |
547 | 119 |
573 | 120 { ngx_string("ssl_session_timeout"), |
121 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, | |
122 ngx_conf_set_sec_slot, | |
123 NGX_HTTP_SRV_CONF_OFFSET, | |
124 offsetof(ngx_http_ssl_srv_conf_t, session_timeout), | |
125 NULL }, | |
126 | |
383
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127 ngx_null_command |
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128 }; |
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129 |
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130 |
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131 static ngx_http_module_t ngx_http_ssl_module_ctx = { |
611 | 132 ngx_http_ssl_add_variables, /* preconfiguration */ |
509 | 133 NULL, /* postconfiguration */ |
383
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134 |
541 | 135 NULL, /* create main configuration */ |
136 NULL, /* init main configuration */ | |
383
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137 |
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138 ngx_http_ssl_create_srv_conf, /* create server configuration */ |
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139 ngx_http_ssl_merge_srv_conf, /* merge server configuration */ |
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140 |
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141 NULL, /* create location configuration */ |
485 | 142 NULL /* merge location configuration */ |
383
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143 }; |
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144 |
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145 |
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146 ngx_module_t ngx_http_ssl_module = { |
509 | 147 NGX_MODULE_V1, |
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148 &ngx_http_ssl_module_ctx, /* module context */ |
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149 ngx_http_ssl_commands, /* module directives */ |
383
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150 NGX_HTTP_MODULE, /* module type */ |
541 | 151 NULL, /* init master */ |
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152 NULL, /* init module */ |
541 | 153 NULL, /* init process */ |
154 NULL, /* init thread */ | |
155 NULL, /* exit thread */ | |
156 NULL, /* exit process */ | |
157 NULL, /* exit master */ | |
158 NGX_MODULE_V1_PADDING | |
383
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159 }; |
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160 |
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161 |
611 | 162 static ngx_http_variable_t ngx_http_ssl_vars[] = { |
163 | |
637 | 164 { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_variable, |
611 | 165 (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 }, |
166 | |
637 | 167 { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_variable, |
611 | 168 (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 }, |
169 | |
647 | 170 { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_client_s_dn, |
171 0, NGX_HTTP_VAR_CHANGABLE, 0 }, | |
172 | |
173 { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_client_i_dn, | |
174 0, NGX_HTTP_VAR_CHANGABLE, 0 }, | |
175 | |
637 | 176 { ngx_null_string, NULL, NULL, 0, 0, 0 } |
611 | 177 }; |
178 | |
179 | |
543 | 180 static u_char ngx_http_session_id_ctx[] = "HTTP"; |
181 | |
182 | |
611 | 183 static ngx_int_t |
184 ngx_http_ssl_variable(ngx_http_request_t *r, | |
185 ngx_http_variable_value_t *v, uintptr_t data) | |
186 { | |
187 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data; | |
188 | |
189 size_t len; | |
190 u_char *name; | |
191 | |
192 if (r->connection->ssl) { | |
193 | |
194 name = handler(r->connection); | |
195 | |
196 for (len = 0; name[len]; len++) { /* void */ } | |
197 | |
198 v->len = len; | |
199 v->valid = 1; | |
200 v->no_cachable = 0; | |
201 v->not_found = 0; | |
202 v->data = name; | |
203 | |
204 return NGX_OK; | |
205 } | |
206 | |
207 v->not_found = 1; | |
208 | |
209 return NGX_OK; | |
210 } | |
211 | |
212 | |
213 static ngx_int_t | |
647 | 214 ngx_http_ssl_client_s_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v, |
215 uintptr_t data) | |
216 { | |
217 if (r->connection->ssl) { | |
218 if (ngx_ssl_get_subject_dn(r->connection, r->pool, (ngx_str_t *) v) | |
219 != NGX_OK) | |
220 { | |
221 return NGX_ERROR; | |
222 } | |
223 | |
224 if (v->len) { | |
225 v->valid = 1; | |
226 v->no_cachable = 0; | |
227 v->not_found = 0; | |
228 | |
229 return NGX_OK; | |
230 } | |
231 } | |
232 | |
233 v->not_found = 1; | |
234 | |
235 return NGX_OK; | |
236 } | |
237 | |
238 | |
239 static ngx_int_t | |
240 ngx_http_ssl_client_i_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v, | |
241 uintptr_t data) | |
242 { | |
243 if (r->connection->ssl) { | |
244 if (ngx_ssl_get_issuer_dn(r->connection, r->pool, (ngx_str_t *) v) | |
245 != NGX_OK) | |
246 { | |
247 return NGX_ERROR; | |
248 } | |
249 | |
250 if (v->len) { | |
251 v->valid = 1; | |
252 v->no_cachable = 0; | |
253 v->not_found = 0; | |
254 | |
255 return NGX_OK; | |
256 } | |
257 } | |
258 | |
259 v->not_found = 1; | |
260 | |
261 return NGX_OK; | |
262 } | |
263 | |
264 | |
265 static ngx_int_t | |
611 | 266 ngx_http_ssl_add_variables(ngx_conf_t *cf) |
267 { | |
268 ngx_http_variable_t *var, *v; | |
269 | |
270 for (v = ngx_http_ssl_vars; v->name.len; v++) { | |
271 var = ngx_http_add_variable(cf, &v->name, v->flags); | |
272 if (var == NULL) { | |
273 return NGX_ERROR; | |
274 } | |
275 | |
637 | 276 var->get_handler = v->get_handler; |
611 | 277 var->data = v->data; |
278 } | |
279 | |
280 return NGX_OK; | |
281 } | |
282 | |
283 | |
501 | 284 static void * |
285 ngx_http_ssl_create_srv_conf(ngx_conf_t *cf) | |
383
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286 { |
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287 ngx_http_ssl_srv_conf_t *scf; |
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288 |
501 | 289 scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t)); |
290 if (scf == NULL) { | |
383
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291 return NGX_CONF_ERROR; |
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292 } |
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293 |
479 | 294 /* |
295 * set by ngx_pcalloc(): | |
296 * | |
547 | 297 * scf->protocols = 0; |
298 | |
479 | 299 * scf->certificate.len = 0; |
300 * scf->certificate.data = NULL; | |
301 * scf->certificate_key.len = 0; | |
302 * scf->certificate_key.data = NULL; | |
647 | 303 * scf->client_certificate.len = 0; |
304 * scf->client_certificate.data = NULL; | |
479 | 305 * scf->ciphers.len = 0; |
306 * scf->ciphers.data = NULL; | |
307 */ | |
308 | |
383
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309 scf->enable = NGX_CONF_UNSET; |
573 | 310 scf->session_timeout = NGX_CONF_UNSET; |
647 | 311 scf->verify = NGX_CONF_UNSET; |
312 scf->verify_depth = NGX_CONF_UNSET; | |
547 | 313 scf->prefer_server_ciphers = NGX_CONF_UNSET; |
383
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314 |
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315 return scf; |
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316 } |
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317 |
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318 |
501 | 319 static char * |
320 ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) | |
383
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321 { |
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322 ngx_http_ssl_srv_conf_t *prev = parent; |
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323 ngx_http_ssl_srv_conf_t *conf = child; |
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324 |
563 | 325 ngx_pool_cleanup_t *cln; |
326 | |
383
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327 ngx_conf_merge_value(conf->enable, prev->enable, 0); |
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328 |
393
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329 if (conf->enable == 0) { |
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330 return NGX_CONF_OK; |
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331 } |
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332 |
573 | 333 ngx_conf_merge_value(conf->session_timeout, |
334 prev->session_timeout, 300); | |
335 | |
547 | 336 ngx_conf_merge_value(conf->prefer_server_ciphers, |
337 prev->prefer_server_ciphers, 0); | |
338 | |
339 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols, | |
340 (NGX_CONF_BITMASK_SET | |
341 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1)); | |
342 | |
647 | 343 ngx_conf_merge_value(conf->verify, prev->verify, 0); |
344 ngx_conf_merge_value(conf->verify_depth, prev->verify_depth, 1); | |
345 | |
383
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346 ngx_conf_merge_str_value(conf->certificate, prev->certificate, |
547 | 347 NGX_DEFLAUT_CERTIFICATE); |
383
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348 |
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349 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, |
547 | 350 NGX_DEFLAUT_CERTIFICATE_KEY); |
383
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351 |
647 | 352 ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate, |
353 ""); | |
354 | |
547 | 355 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS); |
479 | 356 |
357 | |
547 | 358 conf->ssl.log = cf->log; |
386
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359 |
547 | 360 if (ngx_ssl_create(&conf->ssl, conf->protocols) != NGX_OK) { |
386
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361 return NGX_CONF_ERROR; |
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362 } |
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363 |
563 | 364 cln = ngx_pool_cleanup_add(cf->pool, 0); |
365 if (cln == NULL) { | |
509 | 366 return NGX_CONF_ERROR; |
367 } | |
368 | |
563 | 369 cln->handler = ngx_ssl_cleanup_ctx; |
370 cln->data = &conf->ssl; | |
371 | |
372 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate, | |
373 &conf->certificate_key) != NGX_OK) | |
529 | 374 { |
386
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375 return NGX_CONF_ERROR; |
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376 } |
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377 |
547 | 378 if (SSL_CTX_set_cipher_list(conf->ssl.ctx, |
563 | 379 (const char *) conf->ciphers.data) |
380 == 0) | |
529 | 381 { |
395
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382 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, |
547 | 383 "SSL_CTX_set_cipher_list(\"%V\") failed", |
384 &conf->ciphers); | |
385 } | |
386 | |
647 | 387 if (conf->verify) { |
669 | 388 SSL_CTX_set_verify(conf->ssl.ctx, NGX_SSL_VERIFY, |
389 ngx_http_ssl_verify_callback); | |
647 | 390 |
391 SSL_CTX_set_verify_depth(conf->ssl.ctx, conf->verify_depth); | |
392 | |
393 if (conf->client_certificate.len) { | |
394 if (ngx_ssl_client_certificate(cf, &conf->ssl, | |
395 &conf->client_certificate) | |
396 != NGX_OK) | |
397 { | |
398 return NGX_CONF_ERROR; | |
399 } | |
400 } | |
401 } | |
402 | |
563 | 403 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
404 | |
547 | 405 if (conf->prefer_server_ciphers) { |
406 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); | |
407 } | |
408 | |
563 | 409 #endif |
410 | |
547 | 411 /* a temporary 512-bit RSA key is required for export versions of MSIE */ |
412 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) { | |
386
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413 return NGX_CONF_ERROR; |
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414 } |
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415 |
547 | 416 SSL_CTX_set_session_cache_mode(conf->ssl.ctx, SSL_SESS_CACHE_SERVER); |
543 | 417 |
547 | 418 SSL_CTX_set_session_id_context(conf->ssl.ctx, ngx_http_session_id_ctx, |
543 | 419 sizeof(ngx_http_session_id_ctx) - 1); |
541 | 420 |
573 | 421 SSL_CTX_set_timeout(conf->ssl.ctx, conf->session_timeout); |
422 | |
383
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423 return NGX_CONF_OK; |
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424 } |
563 | 425 |
426 | |
669 | 427 static int |
428 ngx_http_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store) | |
429 { | |
430 return 1; | |
431 } | |
432 | |
433 | |
563 | 434 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
435 | |
436 static char * | |
437 ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
438 { | |
439 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
440 "\"%V\" directive is available only in %s,", | |
441 &cmd->name, cmd->post); | |
442 | |
443 return NGX_CONF_ERROR; | |
444 } | |
445 | |
446 #endif |