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> |
|---|---|
| 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 | |
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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" |
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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); | |
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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); |
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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 | |
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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[] = { |
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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, |
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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, |
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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, |
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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 | |
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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 */ |
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134 |
| 541 | 135 NULL, /* create main configuration */ |
| 136 NULL, /* init main configuration */ | |
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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 */ |
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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 */ |
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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 | |
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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) | |
|
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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) { | |
|
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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 | |
|
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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; |
|
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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) | |
|
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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 | |
|
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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 | |
|
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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); |
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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; |
|
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359 |
| 547 | 360 if (ngx_ssl_create(&conf->ssl, conf->protocols) != NGX_OK) { |
|
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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 { |
|
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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) { | |
|
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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 | |
|
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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 |