Mercurial > hg > nginx
annotate src/mail/ngx_mail_ssl_module.c @ 1778:14510c3cc6cb
ssl_session_cache off
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 26 Dec 2007 20:27:22 +0000 |
| parents | f69493e8faab |
| children | 12b3ad3353f9 |
| rev | line source |
|---|---|
| 539 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 1136 | 9 #include <ngx_mail.h> |
| 539 | 10 |
| 11 | |
| 12 #define NGX_DEFLAUT_CERTIFICATE "cert.pem" | |
| 13 #define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem" | |
| 547 | 14 #define NGX_DEFLAUT_CIPHERS "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP" |
| 539 | 15 |
| 16 | |
| 1136 | 17 static void *ngx_mail_ssl_create_conf(ngx_conf_t *cf); |
| 18 static char *ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child); | |
| 19 static char *ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 976 | 20 void *conf); |
| 539 | 21 |
| 563 | 22 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
| 23 | |
| 1136 | 24 static char *ngx_mail_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, |
| 563 | 25 void *conf); |
| 26 | |
| 1136 | 27 static char ngx_mail_ssl_openssl097[] = "OpenSSL 0.9.7 and higher"; |
| 563 | 28 |
| 29 #endif | |
| 30 | |
| 539 | 31 |
| 583 | 32 static ngx_conf_enum_t ngx_http_starttls_state[] = { |
| 1136 | 33 { ngx_string("off"), NGX_MAIL_STARTTLS_OFF }, |
| 34 { ngx_string("on"), NGX_MAIL_STARTTLS_ON }, | |
| 35 { ngx_string("only"), NGX_MAIL_STARTTLS_ONLY }, | |
| 583 | 36 { ngx_null_string, 0 } |
| 37 }; | |
| 38 | |
| 39 | |
| 40 | |
| 1136 | 41 static ngx_conf_bitmask_t ngx_mail_ssl_protocols[] = { |
| 547 | 42 { ngx_string("SSLv2"), NGX_SSL_SSLv2 }, |
| 43 { ngx_string("SSLv3"), NGX_SSL_SSLv3 }, | |
| 44 { ngx_string("TLSv1"), NGX_SSL_TLSv1 }, | |
| 45 { ngx_null_string, 0 } | |
| 46 }; | |
| 47 | |
| 48 | |
| 1136 | 49 static ngx_command_t ngx_mail_ssl_commands[] = { |
| 539 | 50 |
| 51 { ngx_string("ssl"), | |
| 1136 | 52 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, |
| 539 | 53 ngx_conf_set_flag_slot, |
| 1136 | 54 NGX_MAIL_SRV_CONF_OFFSET, |
| 55 offsetof(ngx_mail_ssl_conf_t, enable), | |
| 539 | 56 NULL }, |
| 57 | |
| 583 | 58 { ngx_string("starttls"), |
| 1136 | 59 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 583 | 60 ngx_conf_set_enum_slot, |
| 1136 | 61 NGX_MAIL_SRV_CONF_OFFSET, |
| 62 offsetof(ngx_mail_ssl_conf_t, starttls), | |
| 583 | 63 ngx_http_starttls_state }, |
| 64 | |
| 539 | 65 { ngx_string("ssl_certificate"), |
| 1136 | 66 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 539 | 67 ngx_conf_set_str_slot, |
| 1136 | 68 NGX_MAIL_SRV_CONF_OFFSET, |
| 69 offsetof(ngx_mail_ssl_conf_t, certificate), | |
| 539 | 70 NULL }, |
| 71 | |
| 72 { ngx_string("ssl_certificate_key"), | |
| 1136 | 73 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 539 | 74 ngx_conf_set_str_slot, |
| 1136 | 75 NGX_MAIL_SRV_CONF_OFFSET, |
| 76 offsetof(ngx_mail_ssl_conf_t, certificate_key), | |
| 539 | 77 NULL }, |
| 78 | |
| 547 | 79 { ngx_string("ssl_protocols"), |
| 1136 | 80 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
| 547 | 81 ngx_conf_set_bitmask_slot, |
| 1136 | 82 NGX_MAIL_SRV_CONF_OFFSET, |
| 83 offsetof(ngx_mail_ssl_conf_t, protocols), | |
| 84 &ngx_mail_ssl_protocols }, | |
| 547 | 85 |
| 539 | 86 { ngx_string("ssl_ciphers"), |
| 1136 | 87 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 539 | 88 ngx_conf_set_str_slot, |
| 1136 | 89 NGX_MAIL_SRV_CONF_OFFSET, |
| 90 offsetof(ngx_mail_ssl_conf_t, ciphers), | |
| 539 | 91 NULL }, |
| 92 | |
| 547 | 93 { ngx_string("ssl_prefer_server_ciphers"), |
| 1136 | 94 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, |
| 563 | 95 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
| 547 | 96 ngx_conf_set_flag_slot, |
| 1136 | 97 NGX_MAIL_SRV_CONF_OFFSET, |
| 98 offsetof(ngx_mail_ssl_conf_t, prefer_server_ciphers), | |
| 547 | 99 NULL }, |
| 563 | 100 #else |
| 1136 | 101 ngx_mail_ssl_nosupported, 0, 0, ngx_mail_ssl_openssl097 }, |
| 563 | 102 #endif |
| 103 | |
| 976 | 104 { ngx_string("ssl_session_cache"), |
| 1136 | 105 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12, |
| 106 ngx_mail_ssl_session_cache, | |
| 107 NGX_MAIL_SRV_CONF_OFFSET, | |
| 976 | 108 0, |
| 109 NULL }, | |
| 110 | |
| 573 | 111 { ngx_string("ssl_session_timeout"), |
| 1136 | 112 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 573 | 113 ngx_conf_set_sec_slot, |
| 1136 | 114 NGX_MAIL_SRV_CONF_OFFSET, |
| 115 offsetof(ngx_mail_ssl_conf_t, session_timeout), | |
| 573 | 116 NULL }, |
| 547 | 117 |
| 539 | 118 ngx_null_command |
| 119 }; | |
| 120 | |
| 121 | |
| 1136 | 122 static ngx_mail_module_t ngx_mail_ssl_module_ctx = { |
|
1487
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1136
diff
changeset
|
123 NULL, /* protocol */ |
|
f69493e8faab
ngx_mail_pop3_module, ngx_mail_imap_module, and ngx_mail_smtp_module
Igor Sysoev <igor@sysoev.ru>
parents:
1136
diff
changeset
|
124 |
| 539 | 125 NULL, /* create main configuration */ |
| 126 NULL, /* init main configuration */ | |
| 127 | |
| 1136 | 128 ngx_mail_ssl_create_conf, /* create server configuration */ |
| 129 ngx_mail_ssl_merge_conf /* merge server configuration */ | |
| 539 | 130 }; |
| 131 | |
| 132 | |
| 1136 | 133 ngx_module_t ngx_mail_ssl_module = { |
| 539 | 134 NGX_MODULE_V1, |
| 1136 | 135 &ngx_mail_ssl_module_ctx, /* module context */ |
| 136 ngx_mail_ssl_commands, /* module directives */ | |
| 137 NGX_MAIL_MODULE, /* module type */ | |
| 541 | 138 NULL, /* init master */ |
| 539 | 139 NULL, /* init module */ |
| 541 | 140 NULL, /* init process */ |
| 141 NULL, /* init thread */ | |
| 142 NULL, /* exit thread */ | |
| 143 NULL, /* exit process */ | |
| 144 NULL, /* exit master */ | |
| 145 NGX_MODULE_V1_PADDING | |
| 539 | 146 }; |
| 147 | |
| 148 | |
| 1136 | 149 static ngx_str_t ngx_mail_ssl_sess_id_ctx = ngx_string("MAIL"); |
| 543 | 150 |
| 151 | |
| 539 | 152 static void * |
| 1136 | 153 ngx_mail_ssl_create_conf(ngx_conf_t *cf) |
| 577 | 154 { |
| 1136 | 155 ngx_mail_ssl_conf_t *scf; |
| 577 | 156 |
| 1136 | 157 scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t)); |
| 539 | 158 if (scf == NULL) { |
| 159 return NGX_CONF_ERROR; | |
| 160 } | |
| 161 | |
| 162 /* | |
| 577 | 163 * set by ngx_pcalloc(): |
| 539 | 164 * |
| 547 | 165 * scf->protocols = 0; |
| 539 | 166 * scf->certificate.len = 0; |
| 167 * scf->certificate.data = NULL; | |
| 168 * scf->certificate_key.len = 0; | |
| 169 * scf->certificate_key.data = NULL; | |
| 170 * scf->ciphers.len = 0; | |
| 171 * scf->ciphers.data = NULL; | |
| 976 | 172 * scf->shm_zone = NULL; |
| 539 | 173 */ |
| 174 | |
| 175 scf->enable = NGX_CONF_UNSET; | |
| 583 | 176 scf->starttls = NGX_CONF_UNSET; |
| 976 | 177 scf->prefer_server_ciphers = NGX_CONF_UNSET; |
| 178 scf->builtin_session_cache = NGX_CONF_UNSET; | |
| 573 | 179 scf->session_timeout = NGX_CONF_UNSET; |
| 539 | 180 |
| 181 return scf; | |
| 182 } | |
| 183 | |
| 184 | |
| 185 static char * | |
| 1136 | 186 ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
| 539 | 187 { |
| 1136 | 188 ngx_mail_ssl_conf_t *prev = parent; |
| 189 ngx_mail_ssl_conf_t *conf = child; | |
| 539 | 190 |
| 563 | 191 ngx_pool_cleanup_t *cln; |
| 192 | |
| 539 | 193 ngx_conf_merge_value(conf->enable, prev->enable, 0); |
| 1136 | 194 ngx_conf_merge_value(conf->starttls, prev->starttls, NGX_MAIL_STARTTLS_OFF); |
| 539 | 195 |
| 1136 | 196 if (conf->enable == 0 && conf->starttls == NGX_MAIL_STARTTLS_OFF) { |
| 539 | 197 return NGX_CONF_OK; |
| 198 } | |
| 199 | |
| 573 | 200 ngx_conf_merge_value(conf->session_timeout, |
| 201 prev->session_timeout, 300); | |
| 202 | |
| 547 | 203 ngx_conf_merge_value(conf->prefer_server_ciphers, |
| 204 prev->prefer_server_ciphers, 0); | |
| 205 | |
| 206 ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols, | |
| 207 (NGX_CONF_BITMASK_SET | |
| 208 |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1)); | |
| 209 | |
| 539 | 210 ngx_conf_merge_str_value(conf->certificate, prev->certificate, |
| 1778 | 211 NGX_DEFLAUT_CERTIFICATE); |
| 539 | 212 |
| 213 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, | |
| 1778 | 214 NGX_DEFLAUT_CERTIFICATE_KEY); |
| 539 | 215 |
| 547 | 216 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS); |
| 539 | 217 |
| 218 | |
| 547 | 219 conf->ssl.log = cf->log; |
| 539 | 220 |
| 969 | 221 if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) { |
| 539 | 222 return NGX_CONF_ERROR; |
| 223 } | |
| 224 | |
| 563 | 225 cln = ngx_pool_cleanup_add(cf->pool, 0); |
| 226 if (cln == NULL) { | |
| 539 | 227 return NGX_CONF_ERROR; |
| 228 } | |
| 229 | |
| 563 | 230 cln->handler = ngx_ssl_cleanup_ctx; |
| 231 cln->data = &conf->ssl; | |
| 232 | |
| 233 if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate, | |
| 234 &conf->certificate_key) | |
| 235 != NGX_OK) | |
| 547 | 236 { |
| 237 return NGX_CONF_ERROR; | |
| 238 } | |
| 539 | 239 |
| 240 if (conf->ciphers.len) { | |
| 547 | 241 if (SSL_CTX_set_cipher_list(conf->ssl.ctx, |
| 563 | 242 (const char *) conf->ciphers.data) |
| 243 == 0) | |
| 539 | 244 { |
| 245 ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, | |
| 246 "SSL_CTX_set_cipher_list(\"%V\") failed", | |
| 247 &conf->ciphers); | |
| 248 } | |
| 249 } | |
| 250 | |
| 563 | 251 #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
| 252 | |
| 253 if (conf->prefer_server_ciphers) { | |
| 254 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); | |
| 255 } | |
| 256 | |
| 257 #endif | |
| 258 | |
| 547 | 259 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) { |
| 539 | 260 return NGX_CONF_ERROR; |
| 261 } | |
| 262 | |
| 976 | 263 ngx_conf_merge_value(conf->builtin_session_cache, |
| 1778 | 264 prev->builtin_session_cache, NGX_SSL_NO_SCACHE); |
| 976 | 265 |
| 266 if (conf->shm_zone == NULL) { | |
| 267 conf->shm_zone = prev->shm_zone; | |
| 268 } | |
| 539 | 269 |
| 1136 | 270 if (ngx_ssl_session_cache(&conf->ssl, &ngx_mail_ssl_sess_id_ctx, |
| 976 | 271 conf->builtin_session_cache, |
| 272 conf->shm_zone, conf->session_timeout) | |
| 273 != NGX_OK) | |
| 274 { | |
| 275 return NGX_CONF_ERROR; | |
| 276 } | |
| 573 | 277 |
| 539 | 278 return NGX_CONF_OK; |
| 279 } | |
| 563 | 280 |
| 577 | 281 |
| 976 | 282 static char * |
| 1136 | 283 ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 976 | 284 { |
| 1136 | 285 ngx_mail_ssl_conf_t *scf = conf; |
| 976 | 286 |
| 287 size_t len; | |
| 288 ngx_str_t *value, name, size; | |
| 289 ngx_int_t n; | |
| 290 ngx_uint_t i, j; | |
| 291 | |
| 292 value = cf->args->elts; | |
| 293 | |
| 294 for (i = 1; i < cf->args->nelts; i++) { | |
| 295 | |
| 1778 | 296 if (ngx_strcmp(value[i].data, "off") == 0) { |
| 297 scf->builtin_session_cache = NGX_SSL_NO_SCACHE; | |
| 298 continue; | |
| 299 } | |
| 300 | |
| 976 | 301 if (ngx_strcmp(value[i].data, "builtin") == 0) { |
| 302 scf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE; | |
| 303 continue; | |
| 304 } | |
| 305 | |
| 306 if (value[i].len > sizeof("builtin:") - 1 | |
| 307 && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1) | |
| 308 == 0) | |
| 309 { | |
| 310 n = ngx_atoi(value[i].data + sizeof("builtin:") - 1, | |
| 311 value[i].len - (sizeof("builtin:") - 1)); | |
| 312 | |
| 313 if (n == NGX_ERROR) { | |
| 314 goto invalid; | |
| 315 } | |
| 316 | |
| 317 scf->builtin_session_cache = n; | |
| 318 | |
| 319 continue; | |
| 320 } | |
| 321 | |
| 322 if (value[i].len > sizeof("shared:") - 1 | |
| 323 && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1) | |
| 324 == 0) | |
| 325 { | |
| 326 len = 0; | |
| 327 | |
| 328 for (j = sizeof("shared:") - 1; j < value[i].len; j++) { | |
| 329 if (value[i].data[j] == ':') { | |
| 330 break; | |
| 331 } | |
| 332 | |
| 333 len++; | |
| 334 } | |
| 335 | |
| 336 if (len == 0) { | |
| 337 goto invalid; | |
| 338 } | |
| 339 | |
| 340 name.len = len; | |
| 341 name.data = value[i].data + sizeof("shared:") - 1; | |
| 342 | |
| 343 size.len = value[i].len - j - 1; | |
| 344 size.data = name.data + len + 1; | |
| 345 | |
| 346 n = ngx_parse_size(&size); | |
| 347 | |
| 348 if (n == NGX_ERROR) { | |
| 349 goto invalid; | |
| 350 } | |
| 351 | |
| 352 if (n < (ngx_int_t) (8 * ngx_pagesize)) { | |
| 353 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 354 "session cache \"%V\" is too small", | |
| 355 &value[i]); | |
| 356 | |
| 357 return NGX_CONF_ERROR; | |
| 358 } | |
| 359 | |
| 360 scf->shm_zone = ngx_shared_memory_add(cf, &name, n, | |
| 1136 | 361 &ngx_mail_ssl_module); |
| 976 | 362 if (scf->shm_zone == NULL) { |
| 363 return NGX_CONF_ERROR; | |
| 364 } | |
| 365 | |
| 366 continue; | |
| 367 } | |
| 368 | |
| 369 goto invalid; | |
| 370 } | |
| 371 | |
| 372 if (scf->shm_zone && scf->builtin_session_cache == NGX_CONF_UNSET) { | |
| 373 scf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE; | |
| 374 } | |
| 375 | |
| 376 return NGX_CONF_OK; | |
| 377 | |
| 378 invalid: | |
| 379 | |
| 380 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 381 "invalid session cache \"%V\"", &value[i]); | |
| 382 | |
| 383 return NGX_CONF_ERROR; | |
| 384 } | |
| 385 | |
| 386 | |
| 563 | 387 #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
| 577 | 388 |
| 563 | 389 static char * |
| 1136 | 390 ngx_mail_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 577 | 391 { |
| 563 | 392 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 393 "\"%V\" directive is available only in %s,", | |
| 394 &cmd->name, cmd->post); | |
| 395 | |
| 396 return NGX_CONF_ERROR; | |
| 397 } | |
| 398 | |
| 399 #endif |