Mercurial > hg > nginx
annotate src/http/modules/ngx_http_ssl_module.c @ 973:e1ede83911ef
ssl_session_cache
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Tue, 02 Jan 2007 23:55:05 +0000 |
| parents | 948acd940145 |
| children | 8dfb3aa75de2 |
| 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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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 |
| 671 | 12 typedef ngx_int_t (*ngx_ssl_variable_handler_pt)(ngx_connection_t *c, |
| 13 ngx_pool_t *pool, ngx_str_t *s); | |
| 611 | 14 |
| 15 | |
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16 #define NGX_DEFLAUT_CERTIFICATE "cert.pem" |
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17 #define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem" |
| 547 | 18 #define NGX_DEFLAUT_CIPHERS "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP" |
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19 |
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20 |
| 973 | 21 #define NGX_HTTP_SSL_MAX_SESSION_SIZE \ |
| 22 (4096 - offsetof(ngx_http_ssl_cached_sess_t, asn1)) | |
| 23 | |
| 24 | |
| 25 #define NGX_HTTP_SSL_DFLT_BUILTIN_SCACHE -2 | |
| 26 #define NGX_HTTP_SSL_NO_BUILTIN_SCACHE -3 | |
| 27 | |
| 28 | |
| 29 static void ngx_http_ssl_expire_sessions(ngx_http_ssl_sesssion_cache_t *cache, | |
| 30 ngx_slab_pool_t *shpool, ngx_uint_t expire); | |
| 31 | |
| 671 | 32 static ngx_int_t ngx_http_ssl_static_variable(ngx_http_request_t *r, |
| 611 | 33 ngx_http_variable_value_t *v, uintptr_t data); |
| 671 | 34 static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r, |
| 647 | 35 ngx_http_variable_value_t *v, uintptr_t data); |
| 611 | 36 |
| 37 static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf); | |
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38 static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf); |
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39 static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, |
| 501 | 40 void *parent, void *child); |
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41 |
| 973 | 42 static char *ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, |
| 43 void *conf); | |
| 44 | |
| 563 | 45 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
| 46 | |
| 47 static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 48 void *conf); | |
| 49 | |
| 50 static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher"; | |
| 51 | |
| 52 #endif | |
| 53 | |
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54 |
| 547 | 55 static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = { |
| 56 { ngx_string("SSLv2"), NGX_SSL_SSLv2 }, | |
| 57 { ngx_string("SSLv3"), NGX_SSL_SSLv3 }, | |
| 58 { ngx_string("TLSv1"), NGX_SSL_TLSv1 }, | |
| 59 { ngx_null_string, 0 } | |
| 60 }; | |
| 61 | |
| 62 | |
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63 static ngx_command_t ngx_http_ssl_commands[] = { |
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64 |
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65 { ngx_string("ssl"), |
| 599 | 66 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
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67 ngx_conf_set_flag_slot, |
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68 NGX_HTTP_SRV_CONF_OFFSET, |
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69 offsetof(ngx_http_ssl_srv_conf_t, enable), |
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70 NULL }, |
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71 |
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72 { ngx_string("ssl_certificate"), |
| 599 | 73 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
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74 ngx_conf_set_str_slot, |
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75 NGX_HTTP_SRV_CONF_OFFSET, |
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76 offsetof(ngx_http_ssl_srv_conf_t, certificate), |
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77 NULL }, |
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78 |
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79 { ngx_string("ssl_certificate_key"), |
| 599 | 80 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
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81 ngx_conf_set_str_slot, |
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82 NGX_HTTP_SRV_CONF_OFFSET, |
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83 offsetof(ngx_http_ssl_srv_conf_t, certificate_key), |
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84 NULL }, |
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85 |
| 547 | 86 { ngx_string("ssl_protocols"), |
| 563 | 87 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE, |
| 547 | 88 ngx_conf_set_bitmask_slot, |
| 89 NGX_HTTP_SRV_CONF_OFFSET, | |
| 90 offsetof(ngx_http_ssl_srv_conf_t, protocols), | |
| 91 &ngx_http_ssl_protocols }, | |
| 92 | |
| 479 | 93 { ngx_string("ssl_ciphers"), |
| 563 | 94 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| 479 | 95 ngx_conf_set_str_slot, |
| 96 NGX_HTTP_SRV_CONF_OFFSET, | |
| 97 offsetof(ngx_http_ssl_srv_conf_t, ciphers), | |
| 98 NULL }, | |
| 99 | |
| 647 | 100 { ngx_string("ssl_verify_client"), |
| 667 | 101 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
| 647 | 102 ngx_conf_set_flag_slot, |
| 103 NGX_HTTP_SRV_CONF_OFFSET, | |
| 104 offsetof(ngx_http_ssl_srv_conf_t, verify), | |
| 105 NULL }, | |
| 106 | |
| 107 { ngx_string("ssl_verify_depth"), | |
| 108 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE, | |
| 109 ngx_conf_set_num_slot, | |
| 110 NGX_HTTP_SRV_CONF_OFFSET, | |
| 111 offsetof(ngx_http_ssl_srv_conf_t, verify_depth), | |
| 112 NULL }, | |
| 113 | |
| 114 { ngx_string("ssl_client_certificate"), | |
| 115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, | |
| 116 ngx_conf_set_str_slot, | |
| 117 NGX_HTTP_SRV_CONF_OFFSET, | |
| 118 offsetof(ngx_http_ssl_srv_conf_t, client_certificate), | |
| 119 NULL }, | |
| 120 | |
| 547 | 121 { ngx_string("ssl_prefer_server_ciphers"), |
| 122 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, | |
| 563 | 123 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
| 547 | 124 ngx_conf_set_flag_slot, |
| 125 NGX_HTTP_SRV_CONF_OFFSET, | |
| 126 offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers), | |
| 127 NULL }, | |
| 563 | 128 #else |
| 129 ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 }, | |
| 130 #endif | |
| 547 | 131 |
| 973 | 132 { ngx_string("ssl_session_cache"), |
| 133 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE12, | |
| 134 ngx_http_ssl_session_cache, | |
| 135 NGX_HTTP_SRV_CONF_OFFSET, | |
| 136 0, | |
| 137 NULL }, | |
| 138 | |
| 573 | 139 { ngx_string("ssl_session_timeout"), |
| 140 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, | |
| 141 ngx_conf_set_sec_slot, | |
| 142 NGX_HTTP_SRV_CONF_OFFSET, | |
| 143 offsetof(ngx_http_ssl_srv_conf_t, session_timeout), | |
| 144 NULL }, | |
| 145 | |
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146 ngx_null_command |
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147 }; |
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148 |
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149 |
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150 static ngx_http_module_t ngx_http_ssl_module_ctx = { |
| 611 | 151 ngx_http_ssl_add_variables, /* preconfiguration */ |
| 509 | 152 NULL, /* postconfiguration */ |
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153 |
| 541 | 154 NULL, /* create main configuration */ |
| 155 NULL, /* init main configuration */ | |
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156 |
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157 ngx_http_ssl_create_srv_conf, /* create server configuration */ |
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158 ngx_http_ssl_merge_srv_conf, /* merge server configuration */ |
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159 |
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160 NULL, /* create location configuration */ |
| 485 | 161 NULL /* merge location configuration */ |
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162 }; |
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163 |
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164 |
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165 ngx_module_t ngx_http_ssl_module = { |
| 509 | 166 NGX_MODULE_V1, |
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167 &ngx_http_ssl_module_ctx, /* module context */ |
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168 ngx_http_ssl_commands, /* module directives */ |
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169 NGX_HTTP_MODULE, /* module type */ |
| 541 | 170 NULL, /* init master */ |
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171 NULL, /* init module */ |
| 541 | 172 NULL, /* init process */ |
| 173 NULL, /* init thread */ | |
| 174 NULL, /* exit thread */ | |
| 175 NULL, /* exit process */ | |
| 176 NULL, /* exit master */ | |
| 177 NGX_MODULE_V1_PADDING | |
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178 }; |
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179 |
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180 |
| 611 | 181 static ngx_http_variable_t ngx_http_ssl_vars[] = { |
| 182 | |
| 671 | 183 { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_static_variable, |
| 611 | 184 (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 }, |
| 185 | |
| 671 | 186 { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_static_variable, |
| 611 | 187 (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 }, |
| 188 | |
| 671 | 189 { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_variable, |
| 190 (uintptr_t) ngx_ssl_get_subject_dn, NGX_HTTP_VAR_CHANGABLE, 0 }, | |
| 647 | 191 |
| 671 | 192 { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_variable, |
| 193 (uintptr_t) ngx_ssl_get_issuer_dn, NGX_HTTP_VAR_CHANGABLE, 0 }, | |
| 194 | |
| 195 { ngx_string("ssl_client_serial"), NULL, ngx_http_ssl_variable, | |
| 196 (uintptr_t) ngx_ssl_get_serial_number, NGX_HTTP_VAR_CHANGABLE, 0 }, | |
| 647 | 197 |
| 637 | 198 { ngx_null_string, NULL, NULL, 0, 0, 0 } |
| 611 | 199 }; |
| 200 | |
| 201 | |
| 543 | 202 static u_char ngx_http_session_id_ctx[] = "HTTP"; |
| 203 | |
| 204 | |
| 611 | 205 static ngx_int_t |
| 973 | 206 ngx_http_ssl_session_cache_init(ngx_shm_zone_t *shm_zone) |
| 207 { | |
| 208 ngx_slab_pool_t *shpool; | |
| 209 ngx_rbtree_node_t *sentinel; | |
| 210 ngx_http_ssl_sesssion_cache_t *cache; | |
| 211 | |
| 212 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; | |
| 213 | |
| 214 cache = ngx_slab_alloc(shpool, sizeof(ngx_http_ssl_sesssion_cache_t)); | |
| 215 if (cache == NULL) { | |
| 216 return NGX_ERROR; | |
| 217 } | |
| 218 | |
| 219 cache->session_cache_head.prev = NULL; | |
| 220 cache->session_cache_head.next = &cache->session_cache_tail; | |
| 221 | |
| 222 cache->session_cache_tail.prev = &cache->session_cache_head; | |
| 223 cache->session_cache_tail.next = NULL; | |
| 224 | |
| 225 cache->session_rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t)); | |
| 226 if (cache->session_rbtree == NULL) { | |
| 227 return NGX_ERROR; | |
| 228 } | |
| 229 | |
| 230 sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t)); | |
| 231 if (sentinel == NULL) { | |
| 232 return NGX_ERROR; | |
| 233 } | |
| 234 | |
| 235 ngx_rbtree_sentinel_init(sentinel); | |
| 236 | |
| 237 cache->session_rbtree->root = sentinel; | |
| 238 cache->session_rbtree->sentinel = sentinel; | |
| 239 cache->session_rbtree->insert = ngx_rbtree_insert_value; | |
| 240 | |
| 241 shm_zone->data = cache; | |
| 242 | |
| 243 return NGX_OK; | |
| 244 } | |
| 245 | |
| 246 | |
| 247 /* | |
| 248 * OpenSSL's i2d_SSL_SESSION() and d2i_SSL_SESSION are slow, | |
| 249 * so they are outside the code locked by shared pool mutex | |
| 250 */ | |
| 251 | |
| 252 static int | |
| 253 ngx_http_ssl_new_session(ngx_ssl_conn_t *ssl_conn, ngx_ssl_session_t *sess) | |
| 254 { | |
| 255 int len; | |
| 256 u_char *p, *id; | |
| 257 uint32_t hash; | |
| 258 ngx_time_t *tp; | |
| 259 ngx_slab_pool_t *shpool; | |
| 260 ngx_connection_t *c; | |
| 261 ngx_http_request_t *r; | |
| 262 ngx_http_ssl_sess_id_t *sess_id; | |
| 263 ngx_http_ssl_srv_conf_t *sscf; | |
| 264 ngx_http_ssl_cached_sess_t *cached_sess; | |
| 265 ngx_http_ssl_sesssion_cache_t *cache; | |
| 266 u_char buf[NGX_HTTP_SSL_MAX_SESSION_SIZE]; | |
| 267 | |
| 268 len = i2d_SSL_SESSION(sess, NULL); | |
| 269 | |
| 270 /* do not cache too big session */ | |
| 271 | |
| 272 if (len > (int) NGX_HTTP_SSL_MAX_SESSION_SIZE) { | |
| 273 return 0; | |
| 274 } | |
| 275 | |
| 276 c = ngx_ssl_get_connection(ssl_conn); | |
| 277 r = c->data; | |
| 278 | |
| 279 p = buf; | |
| 280 i2d_SSL_SESSION(sess, &p); | |
| 281 | |
| 282 sscf = ngx_http_get_module_srv_conf(r, ngx_http_ssl_module); | |
| 283 | |
| 284 cache = sscf->shm_zone->data; | |
| 285 shpool = (ngx_slab_pool_t *) sscf->shm_zone->shm.addr; | |
| 286 | |
| 287 ngx_shmtx_lock(&shpool->mutex); | |
| 288 | |
| 289 /* drop one or two expired sessions */ | |
| 290 ngx_http_ssl_expire_sessions(cache, shpool, 1); | |
| 291 | |
| 292 cached_sess = ngx_slab_alloc_locked(shpool, | |
| 293 offsetof(ngx_http_ssl_cached_sess_t, asn1) + len); | |
| 294 | |
| 295 if (cached_sess == NULL) { | |
| 296 | |
| 297 /* drop the oldest non-expired session and try once more */ | |
| 298 | |
| 299 ngx_http_ssl_expire_sessions(cache, shpool, 0); | |
| 300 | |
| 301 cached_sess = ngx_slab_alloc_locked(shpool, | |
| 302 offsetof(ngx_http_ssl_cached_sess_t, asn1) + len); | |
| 303 | |
| 304 if (cached_sess == NULL) { | |
| 305 id = NULL; | |
| 306 goto failed; | |
| 307 } | |
| 308 } | |
| 309 | |
| 310 id = ngx_slab_alloc_locked(shpool, sess->session_id_length); | |
| 311 if (id == NULL) { | |
| 312 goto failed; | |
| 313 } | |
| 314 | |
| 315 sess_id = ngx_slab_alloc_locked(shpool, sizeof(ngx_http_ssl_sess_id_t)); | |
| 316 if (sess_id == NULL) { | |
| 317 goto failed; | |
| 318 } | |
| 319 | |
| 320 ngx_memcpy(&cached_sess->asn1[0], buf, len); | |
| 321 | |
| 322 ngx_memcpy(id, sess->session_id, sess->session_id_length); | |
| 323 | |
| 324 hash = ngx_crc32_short(sess->session_id, sess->session_id_length); | |
| 325 | |
| 326 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 327 "http ssl new session: %08XD:%d:%d", | |
| 328 hash, sess->session_id_length, len); | |
| 329 | |
| 330 sess_id->node.key = hash; | |
| 331 sess_id->node.data = (u_char) sess->session_id_length; | |
| 332 sess_id->id = id; | |
| 333 sess_id->len = len; | |
| 334 sess_id->session = cached_sess; | |
| 335 | |
| 336 tp = ngx_timeofday(); | |
| 337 | |
| 338 cached_sess->expire = tp->sec + sscf->session_timeout; | |
| 339 cached_sess->sess_id = sess_id; | |
| 340 | |
| 341 cached_sess->next = cache->session_cache_head.next; | |
| 342 cached_sess->next->prev = cached_sess; | |
| 343 cached_sess->prev = &cache->session_cache_head; | |
| 344 cache->session_cache_head.next = cached_sess; | |
| 345 | |
| 346 ngx_rbtree_insert(cache->session_rbtree, &sess_id->node); | |
| 347 | |
| 348 ngx_shmtx_unlock(&shpool->mutex); | |
| 349 | |
| 350 return 0; | |
| 351 | |
| 352 failed: | |
| 353 | |
| 354 if (cached_sess) { | |
| 355 ngx_slab_free_locked(shpool, cached_sess); | |
| 356 } | |
| 357 | |
| 358 if (id) { | |
| 359 ngx_slab_free_locked(shpool, id); | |
| 360 } | |
| 361 | |
| 362 ngx_shmtx_unlock(&shpool->mutex); | |
| 363 | |
| 364 ngx_log_error(NGX_LOG_ALERT, c->log, 0, | |
| 365 "could not add new SSL session to the session cache"); | |
| 366 | |
| 367 return 0; | |
| 368 } | |
| 369 | |
| 370 | |
| 371 static ngx_ssl_session_t * | |
| 372 ngx_http_ssl_get_session(ngx_ssl_conn_t *ssl_conn, u_char *id, int len, | |
| 373 int *copy) | |
| 374 { | |
| 375 #if OPENSSL_VERSION_NUMBER >= 0x00908000 | |
| 376 const | |
| 377 #endif | |
| 378 u_char *p; | |
| 379 uint32_t hash; | |
| 380 ngx_time_t *tp; | |
| 381 ngx_slab_pool_t *shpool; | |
| 382 ngx_connection_t *c; | |
| 383 ngx_rbtree_node_t *node, *sentinel; | |
| 384 ngx_ssl_session_t *sess; | |
| 385 ngx_http_request_t *r; | |
| 386 ngx_http_ssl_sess_id_t *sess_id; | |
| 387 ngx_http_ssl_srv_conf_t *sscf; | |
| 388 ngx_http_ssl_cached_sess_t *cached_sess; | |
| 389 ngx_http_ssl_sesssion_cache_t *cache; | |
| 390 u_char buf[NGX_HTTP_SSL_MAX_SESSION_SIZE]; | |
| 391 | |
| 392 c = ngx_ssl_get_connection(ssl_conn); | |
| 393 r = c->data; | |
| 394 | |
| 395 sscf = ngx_http_get_module_srv_conf(r, ngx_http_ssl_module); | |
| 396 | |
| 397 hash = ngx_crc32_short(id, len); | |
| 398 *copy = 0; | |
| 399 | |
| 400 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
| 401 "http ssl get session: %08XD:%d", hash, len); | |
| 402 | |
| 403 cache = sscf->shm_zone->data; | |
| 404 | |
| 405 if (cache->session_rbtree == NULL) { | |
| 406 return NULL; | |
| 407 } | |
| 408 | |
| 409 sess = NULL; | |
| 410 | |
| 411 shpool = (ngx_slab_pool_t *) sscf->shm_zone->shm.addr; | |
| 412 | |
| 413 ngx_shmtx_lock(&shpool->mutex); | |
| 414 | |
| 415 node = cache->session_rbtree->root; | |
| 416 sentinel = cache->session_rbtree->sentinel; | |
| 417 | |
| 418 while (node != sentinel) { | |
| 419 | |
| 420 if (hash < node->key) { | |
| 421 node = node->left; | |
| 422 continue; | |
| 423 } | |
| 424 | |
| 425 if (hash > node->key) { | |
| 426 node = node->right; | |
| 427 continue; | |
| 428 } | |
| 429 | |
| 430 if (hash == node->key && (u_char) len == node->data) { | |
| 431 sess_id = (ngx_http_ssl_sess_id_t *) node; | |
| 432 | |
| 433 if (ngx_strncmp(id, sess_id->id, len) == 0) { | |
| 434 | |
| 435 cached_sess = sess_id->session; | |
| 436 | |
| 437 tp = ngx_timeofday(); | |
| 438 | |
| 439 if (cached_sess->expire > tp->sec) { | |
| 440 ngx_memcpy(buf, &cached_sess->asn1[0], sess_id->len); | |
| 441 | |
| 442 ngx_shmtx_unlock(&shpool->mutex); | |
| 443 | |
| 444 p = buf; | |
| 445 sess = d2i_SSL_SESSION(NULL, &p, sess_id->len); | |
| 446 | |
| 447 return sess; | |
| 448 } | |
| 449 | |
| 450 cached_sess->next->prev = cached_sess->prev; | |
| 451 cached_sess->prev->next = cached_sess->next; | |
| 452 | |
| 453 ngx_rbtree_delete(cache->session_rbtree, node); | |
| 454 | |
| 455 ngx_slab_free_locked(shpool, cached_sess); | |
| 456 ngx_slab_free_locked(shpool, sess_id->id); | |
| 457 ngx_slab_free_locked(shpool, sess_id); | |
| 458 | |
| 459 sess = NULL; | |
| 460 | |
| 461 break; | |
| 462 } | |
| 463 } | |
| 464 | |
| 465 node = node->right; | |
| 466 } | |
| 467 | |
| 468 ngx_shmtx_unlock(&shpool->mutex); | |
| 469 | |
| 470 return sess; | |
| 471 } | |
| 472 | |
| 473 | |
| 474 static void | |
| 475 ngx_http_ssl_remove_session(SSL_CTX *ssl, ngx_ssl_session_t *sess) | |
| 476 { | |
| 477 u_char *id, len; | |
| 478 uint32_t hash; | |
| 479 ngx_slab_pool_t *shpool; | |
| 480 ngx_rbtree_node_t *node, *sentinel; | |
| 481 ngx_http_ssl_sess_id_t *sess_id; | |
| 482 ngx_http_ssl_srv_conf_t *sscf; | |
| 483 ngx_http_ssl_cached_sess_t *cached_sess; | |
| 484 ngx_http_ssl_sesssion_cache_t *cache; | |
| 485 | |
| 486 sscf = ngx_ssl_get_server_conf(ssl); | |
| 487 | |
| 488 cache = sscf->shm_zone->data; | |
| 489 | |
| 490 id = sess->session_id; | |
| 491 len = (u_char) sess->session_id_length; | |
| 492 | |
| 493 hash = ngx_crc32_short(id, (size_t) len); | |
| 494 | |
| 495 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0, | |
| 496 "http ssl remove session: %08XD:%d", hash, len); | |
| 497 | |
| 498 shpool = (ngx_slab_pool_t *) sscf->shm_zone->shm.addr; | |
| 499 | |
| 500 ngx_shmtx_lock(&shpool->mutex); | |
| 501 | |
| 502 node = cache->session_rbtree->root; | |
| 503 sentinel = cache->session_rbtree->sentinel; | |
| 504 | |
| 505 while (node != sentinel) { | |
| 506 | |
| 507 if (hash < node->key) { | |
| 508 node = node->left; | |
| 509 continue; | |
| 510 } | |
| 511 | |
| 512 if (hash > node->key) { | |
| 513 node = node->right; | |
| 514 continue; | |
| 515 } | |
| 516 | |
| 517 if (hash == node->key && len == node->data) { | |
| 518 sess_id = (ngx_http_ssl_sess_id_t *) node; | |
| 519 | |
| 520 if (ngx_strncmp(id, sess_id->id, (size_t) len) == 0) { | |
| 521 | |
| 522 cached_sess = sess_id->session; | |
| 523 | |
| 524 cached_sess->next->prev = cached_sess->prev; | |
| 525 cached_sess->prev->next = cached_sess->next; | |
| 526 | |
| 527 ngx_rbtree_delete(cache->session_rbtree, node); | |
| 528 | |
| 529 ngx_slab_free_locked(shpool, cached_sess); | |
| 530 ngx_slab_free_locked(shpool, sess_id->id); | |
| 531 ngx_slab_free_locked(shpool, sess_id); | |
| 532 | |
| 533 break; | |
| 534 } | |
| 535 } | |
| 536 | |
| 537 node = node->right; | |
| 538 } | |
| 539 | |
| 540 ngx_shmtx_unlock(&shpool->mutex); | |
| 541 } | |
| 542 | |
| 543 | |
| 544 static void | |
| 545 ngx_http_ssl_expire_sessions(ngx_http_ssl_sesssion_cache_t *cache, | |
| 546 ngx_slab_pool_t *shpool, ngx_uint_t n) | |
| 547 { | |
| 548 ngx_time_t *tp; | |
| 549 ngx_http_ssl_sess_id_t *sess_id; | |
| 550 ngx_http_ssl_cached_sess_t *sess; | |
| 551 | |
| 552 tp = ngx_timeofday(); | |
| 553 | |
| 554 while (n < 3) { | |
| 555 | |
| 556 sess = cache->session_cache_tail.prev; | |
| 557 | |
| 558 if (sess == &cache->session_cache_head) { | |
| 559 return; | |
| 560 } | |
| 561 | |
| 562 if (n++ != 0 && sess->expire > tp->sec) { | |
| 563 break; | |
| 564 } | |
| 565 | |
| 566 sess->next->prev = sess->prev; | |
| 567 sess->prev->next = sess->next; | |
| 568 | |
| 569 sess_id = sess->sess_id; | |
| 570 | |
| 571 ngx_rbtree_delete(cache->session_rbtree, &sess_id->node); | |
| 572 | |
| 573 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0, | |
| 574 "expire session: %08Xi", sess_id->node.key); | |
| 575 | |
| 576 ngx_slab_free_locked(shpool, sess); | |
| 577 ngx_slab_free_locked(shpool, sess_id->id); | |
| 578 ngx_slab_free_locked(shpool, sess_id); | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 | |
| 583 static ngx_int_t | |
| 671 | 584 ngx_http_ssl_static_variable(ngx_http_request_t *r, |
| 611 | 585 ngx_http_variable_value_t *v, uintptr_t data) |
| 586 { | |
| 671 | 587 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data; |
| 611 | 588 |
| 671 | 589 size_t len; |
| 611 | 590 |
| 591 if (r->connection->ssl) { | |
| 592 | |
| 671 | 593 (void) handler(r->connection, NULL, (ngx_str_t *) v); |
| 611 | 594 |
| 671 | 595 for (len = 0; v->data[len]; len++) { /* void */ } |
| 611 | 596 |
| 597 v->len = len; | |
| 598 v->valid = 1; | |
| 599 v->no_cachable = 0; | |
| 600 v->not_found = 0; | |
| 601 | |
| 602 return NGX_OK; | |
| 603 } | |
| 604 | |
| 605 v->not_found = 1; | |
| 606 | |
| 607 return NGX_OK; | |
| 608 } | |
| 609 | |
| 610 | |
| 611 static ngx_int_t | |
| 671 | 612 ngx_http_ssl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, |
| 647 | 613 uintptr_t data) |
| 614 { | |
| 671 | 615 ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data; |
| 647 | 616 |
| 617 if (r->connection->ssl) { | |
| 671 | 618 if (handler(r->connection, r->pool, (ngx_str_t *) v) != NGX_OK) { |
| 647 | 619 return NGX_ERROR; |
| 620 } | |
| 621 | |
| 622 if (v->len) { | |
| 623 v->valid = 1; | |
| 624 v->no_cachable = 0; | |
| 625 v->not_found = 0; | |
| 626 | |
| 627 return NGX_OK; | |
| 628 } | |
| 629 } | |
| 630 | |
| 631 v->not_found = 1; | |
| 632 | |
| 633 return NGX_OK; | |
| 634 } | |
| 635 | |
| 636 | |
| 637 static ngx_int_t | |
| 611 | 638 ngx_http_ssl_add_variables(ngx_conf_t *cf) |
| 639 { | |
| 640 ngx_http_variable_t *var, *v; | |
| 641 | |
| 642 for (v = ngx_http_ssl_vars; v->name.len; v++) { | |
| 643 var = ngx_http_add_variable(cf, &v->name, v->flags); | |
| 644 if (var == NULL) { | |
| 645 return NGX_ERROR; | |
| 646 } | |
| 647 | |
| 637 | 648 var->get_handler = v->get_handler; |
| 611 | 649 var->data = v->data; |
| 650 } | |
| 651 | |
| 652 return NGX_OK; | |
| 653 } | |
| 654 | |
| 655 | |
| 501 | 656 static void * |
| 657 ngx_http_ssl_create_srv_conf(ngx_conf_t *cf) | |
|
383
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658 { |
| 971 | 659 ngx_http_ssl_srv_conf_t *sscf; |
|
383
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parents:
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|
660 |
| 971 | 661 sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t)); |
| 662 if (sscf == NULL) { | |
|
383
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663 return NGX_CONF_ERROR; |
|
c05876036128
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parents:
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|
664 } |
|
c05876036128
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parents:
diff
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|
665 |
| 479 | 666 /* |
| 667 * set by ngx_pcalloc(): | |
| 668 * | |
| 971 | 669 * sscf->protocols = 0; |
| 670 * sscf->certificate.len = 0; | |
| 671 * sscf->certificate.data = NULL; | |
| 672 * sscf->certificate_key.len = 0; | |
| 673 * sscf->certificate_key.data = NULL; | |
| 674 * sscf->client_certificate.len = 0; | |
| 675 * sscf->client_certificate.data = NULL; | |
| 676 * sscf->ciphers.len = 0; | |
| 677 * sscf->ciphers.data = NULL; | |
| 973 | 678 * sscf->shm_zone = NULL; |
| 479 | 679 */ |
| 680 | |
| 971 | 681 sscf->enable = NGX_CONF_UNSET; |
| 682 sscf->verify = NGX_CONF_UNSET; | |
| 683 sscf->verify_depth = NGX_CONF_UNSET; | |
| 684 sscf->prefer_server_ciphers = NGX_CONF_UNSET; | |
| 973 | 685 sscf->builtin_session_cache = NGX_CONF_UNSET; |
| 686 sscf->session_timeout = NGX_CONF_UNSET; | |
|
383
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687 |
| 971 | 688 return sscf; |
|
383
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689 } |
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parents:
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690 |
|
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parents:
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691 |
| 501 | 692 static char * |
| 693 ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) | |
|
383
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694 { |
|
c05876036128
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695 ngx_http_ssl_srv_conf_t *prev = parent; |
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696 ngx_http_ssl_srv_conf_t *conf = child; |
|
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697 |
| 973 | 698 long cache_mode; |
| 563 | 699 ngx_pool_cleanup_t *cln; |
| 700 | |
|
383
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701 ngx_conf_merge_value(conf->enable, prev->enable, 0); |
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702 |
|
393
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392
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703 if (conf->enable == 0) { |
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704 return NGX_CONF_OK; |
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705 } |
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706 |
| 573 | 707 ngx_conf_merge_value(conf->session_timeout, |
| 708 prev->session_timeout, 300); | |
| 709 | |
| 547 | 710 ngx_conf_merge_value(conf->prefer_server_ciphers, |
| 711 prev->prefer_server_ciphers, 0); | |
| 712 | |
| 713 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols, | |
| 714 (NGX_CONF_BITMASK_SET | |
| 715 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1)); | |
| 716 | |
| 647 | 717 ngx_conf_merge_value(conf->verify, prev->verify, 0); |
| 718 ngx_conf_merge_value(conf->verify_depth, prev->verify_depth, 1); | |
| 719 | |
|
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720 ngx_conf_merge_str_value(conf->certificate, prev->certificate, |
| 547 | 721 NGX_DEFLAUT_CERTIFICATE); |
|
383
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722 |
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723 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, |
| 547 | 724 NGX_DEFLAUT_CERTIFICATE_KEY); |
|
383
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725 |
| 647 | 726 ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate, |
| 727 ""); | |
| 728 | |
| 547 | 729 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS); |
| 479 | 730 |
| 731 | |
| 547 | 732 conf->ssl.log = cf->log; |
|
386
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733 |
| 969 | 734 if (ngx_ssl_create(&conf->ssl, conf->protocols, conf) != NGX_OK) { |
|
386
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735 return NGX_CONF_ERROR; |
|
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736 } |
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737 |
| 563 | 738 cln = ngx_pool_cleanup_add(cf->pool, 0); |
| 739 if (cln == NULL) { | |
| 509 | 740 return NGX_CONF_ERROR; |
| 741 } | |
| 742 | |
| 563 | 743 cln->handler = ngx_ssl_cleanup_ctx; |
| 744 cln->data = &conf->ssl; | |
| 745 | |
| 746 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate, | |
| 970 | 747 &conf->certificate_key) |
| 748 != NGX_OK) | |
| 529 | 749 { |
|
386
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750 return NGX_CONF_ERROR; |
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751 } |
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752 |
| 547 | 753 if (SSL_CTX_set_cipher_list(conf->ssl.ctx, |
| 563 | 754 (const char *) conf->ciphers.data) |
| 755 == 0) | |
| 529 | 756 { |
|
395
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757 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, |
| 547 | 758 "SSL_CTX_set_cipher_list(\"%V\") failed", |
| 759 &conf->ciphers); | |
| 760 } | |
| 761 | |
| 647 | 762 if (conf->verify) { |
| 671 | 763 if (ngx_ssl_client_certificate(cf, &conf->ssl, |
| 970 | 764 &conf->client_certificate, |
| 765 conf->verify_depth) | |
| 671 | 766 != NGX_OK) |
| 767 { | |
| 768 return NGX_CONF_ERROR; | |
| 647 | 769 } |
| 770 } | |
| 771 | |
| 563 | 772 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
| 773 | |
| 547 | 774 if (conf->prefer_server_ciphers) { |
| 775 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); | |
| 776 } | |
| 777 | |
| 563 | 778 #endif |
| 779 | |
| 547 | 780 /* a temporary 512-bit RSA key is required for export versions of MSIE */ |
| 781 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) { | |
|
386
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782 return NGX_CONF_ERROR; |
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783 } |
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784 |
| 973 | 785 ngx_conf_merge_value(conf->builtin_session_cache, |
| 786 prev->builtin_session_cache, | |
| 787 NGX_HTTP_SSL_DFLT_BUILTIN_SCACHE); | |
| 788 | |
| 789 if (conf->shm_zone == NULL) { | |
| 790 conf->shm_zone = prev->shm_zone; | |
| 791 } | |
| 792 | |
| 793 cache_mode = SSL_SESS_CACHE_SERVER; | |
| 794 | |
| 795 if (conf->shm_zone | |
| 796 && conf->builtin_session_cache == NGX_HTTP_SSL_NO_BUILTIN_SCACHE) | |
| 797 { | |
| 798 cache_mode |= SSL_SESS_CACHE_NO_INTERNAL; | |
| 799 } | |
| 800 | |
| 801 SSL_CTX_set_session_cache_mode(conf->ssl.ctx, cache_mode); | |
| 543 | 802 |
| 547 | 803 SSL_CTX_set_session_id_context(conf->ssl.ctx, ngx_http_session_id_ctx, |
| 543 | 804 sizeof(ngx_http_session_id_ctx) - 1); |
| 541 | 805 |
| 973 | 806 if (conf->builtin_session_cache != NGX_HTTP_SSL_NO_BUILTIN_SCACHE) { |
| 807 | |
| 808 if (conf->builtin_session_cache != NGX_HTTP_SSL_DFLT_BUILTIN_SCACHE) { | |
| 809 SSL_CTX_sess_set_cache_size(conf->ssl.ctx, | |
| 810 conf->builtin_session_cache); | |
| 811 } | |
| 812 | |
| 813 SSL_CTX_set_timeout(conf->ssl.ctx, conf->session_timeout); | |
| 814 } | |
| 815 | |
| 816 if (conf->shm_zone) { | |
| 817 SSL_CTX_sess_set_new_cb(conf->ssl.ctx, ngx_http_ssl_new_session); | |
| 818 SSL_CTX_sess_set_get_cb(conf->ssl.ctx, ngx_http_ssl_get_session); | |
| 819 SSL_CTX_sess_set_remove_cb(conf->ssl.ctx, ngx_http_ssl_remove_session); | |
| 820 } | |
| 573 | 821 |
|
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822 return NGX_CONF_OK; |
|
c05876036128
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parents:
diff
changeset
|
823 } |
| 563 | 824 |
| 825 | |
| 973 | 826 static char * |
| 827 ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 828 { | |
| 829 ngx_http_ssl_srv_conf_t *sscf = conf; | |
| 830 | |
| 831 size_t len; | |
| 832 ngx_str_t *value, name, size; | |
| 833 ngx_int_t n; | |
| 834 ngx_uint_t i, j; | |
| 835 | |
| 836 value = cf->args->elts; | |
| 837 | |
| 838 for (i = 1; i < cf->args->nelts; i++) { | |
| 839 | |
| 840 if (ngx_strcmp(value[i].data, "builtin") == 0) { | |
| 841 sscf->builtin_session_cache = NGX_HTTP_SSL_DFLT_BUILTIN_SCACHE; | |
| 842 continue; | |
| 843 } | |
| 844 | |
| 845 if (value[i].len > sizeof("builtin:") - 1 | |
| 846 && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1) | |
| 847 == 0) | |
| 848 { | |
| 849 n = ngx_atoi(value[i].data + sizeof("builtin:") - 1, | |
| 850 value[i].len - (sizeof("builtin:") - 1)); | |
| 851 | |
| 852 if (n == NGX_ERROR) { | |
| 853 goto invalid; | |
| 854 } | |
| 855 | |
| 856 sscf->builtin_session_cache = n; | |
| 857 | |
| 858 continue; | |
| 859 } | |
| 860 | |
| 861 if (value[i].len > sizeof("shared:") - 1 | |
| 862 && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1) | |
| 863 == 0) | |
| 864 { | |
| 865 len = 0; | |
| 866 | |
| 867 for (j = sizeof("shared:") - 1; j < value[i].len; j++) { | |
| 868 if (value[i].data[j] == ':') { | |
| 869 break; | |
| 870 } | |
| 871 | |
| 872 len++; | |
| 873 } | |
| 874 | |
| 875 if (len == 0) { | |
| 876 goto invalid; | |
| 877 } | |
| 878 | |
| 879 name.len = len; | |
| 880 name.data = value[i].data + sizeof("shared:") - 1; | |
| 881 | |
| 882 size.len = value[i].len - j - 1; | |
| 883 size.data = name.data + len + 1; | |
| 884 | |
| 885 n = ngx_parse_size(&size); | |
| 886 | |
| 887 if (n == NGX_ERROR) { | |
| 888 goto invalid; | |
| 889 } | |
| 890 | |
| 891 if (n < (ngx_int_t) (8 * ngx_pagesize)) { | |
| 892 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 893 "session cache \"%V\" to small", | |
| 894 &value[i]); | |
| 895 | |
| 896 return NGX_CONF_ERROR; | |
| 897 } | |
| 898 | |
| 899 sscf->shm_zone = ngx_shared_memory_add(cf, &name, n, | |
| 900 &ngx_http_ssl_module); | |
| 901 if (sscf->shm_zone == NULL) { | |
| 902 return NGX_CONF_ERROR; | |
| 903 } | |
| 904 | |
| 905 sscf->shm_zone->init = ngx_http_ssl_session_cache_init; | |
| 906 | |
| 907 continue; | |
| 908 } | |
| 909 | |
| 910 goto invalid; | |
| 911 } | |
| 912 | |
| 913 if (sscf->shm_zone && sscf->builtin_session_cache == NGX_CONF_UNSET) { | |
| 914 sscf->builtin_session_cache = NGX_HTTP_SSL_NO_BUILTIN_SCACHE; | |
| 915 } | |
| 916 | |
| 917 return NGX_CONF_OK; | |
| 918 | |
| 919 invalid: | |
| 920 | |
| 921 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 922 "invalid session cache \"%V\"", &value[i]); | |
| 923 | |
| 924 return NGX_CONF_ERROR; | |
| 925 } | |
| 926 | |
| 927 | |
| 563 | 928 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
| 929 | |
| 930 static char * | |
| 931 ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 932 { | |
| 933 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 934 "\"%V\" directive is available only in %s,", | |
| 935 &cmd->name, cmd->post); | |
| 936 | |
| 937 return NGX_CONF_ERROR; | |
| 938 } | |
| 939 | |
| 940 #endif |