Mercurial > hg > nginx
annotate src/mail/ngx_mail_ssl_module.c @ 3196:b7e68ee09e0c
use only strong ciphers by default
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 07 Oct 2009 14:46:13 +0000 |
| parents | dd2ae3872634 |
| children | dd1570b6f237 |
| 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 | |
|
3196
b7e68ee09e0c
use only strong ciphers by default
Igor Sysoev <igor@sysoev.ru>
parents:
3190
diff
changeset
|
12 #define NGX_DEFAULT_CIPHERS "HIGH:!ADH:!MD5" |
| 539 | 13 |
| 14 | |
| 1136 | 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); | |
| 2224 | 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); | |
| 1136 | 22 static char *ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, |
| 976 | 23 void *conf); |
| 539 | 24 |
| 25 | |
| 583 | 26 static ngx_conf_enum_t ngx_http_starttls_state[] = { |
| 1136 | 27 { ngx_string("off"), NGX_MAIL_STARTTLS_OFF }, |
| 28 { ngx_string("on"), NGX_MAIL_STARTTLS_ON }, | |
| 29 { ngx_string("only"), NGX_MAIL_STARTTLS_ONLY }, | |
| 583 | 30 { ngx_null_string, 0 } |
| 31 }; | |
| 32 | |
| 33 | |
| 34 | |
| 1136 | 35 static ngx_conf_bitmask_t ngx_mail_ssl_protocols[] = { |
| 547 | 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 | |
| 1136 | 43 static ngx_command_t ngx_mail_ssl_commands[] = { |
| 539 | 44 |
| 45 { ngx_string("ssl"), | |
| 1136 | 46 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, |
| 2224 | 47 ngx_mail_ssl_enable, |
| 1136 | 48 NGX_MAIL_SRV_CONF_OFFSET, |
| 49 offsetof(ngx_mail_ssl_conf_t, enable), | |
| 539 | 50 NULL }, |
| 51 | |
| 583 | 52 { ngx_string("starttls"), |
| 1136 | 53 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 2224 | 54 ngx_mail_ssl_starttls, |
| 1136 | 55 NGX_MAIL_SRV_CONF_OFFSET, |
| 56 offsetof(ngx_mail_ssl_conf_t, starttls), | |
| 583 | 57 ngx_http_starttls_state }, |
| 58 | |
| 539 | 59 { ngx_string("ssl_certificate"), |
| 1136 | 60 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 539 | 61 ngx_conf_set_str_slot, |
| 1136 | 62 NGX_MAIL_SRV_CONF_OFFSET, |
| 63 offsetof(ngx_mail_ssl_conf_t, certificate), | |
| 539 | 64 NULL }, |
| 65 | |
| 66 { ngx_string("ssl_certificate_key"), | |
| 1136 | 67 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 539 | 68 ngx_conf_set_str_slot, |
| 1136 | 69 NGX_MAIL_SRV_CONF_OFFSET, |
| 70 offsetof(ngx_mail_ssl_conf_t, certificate_key), | |
| 539 | 71 NULL }, |
| 72 | |
| 2044 | 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 | |
| 547 | 80 { ngx_string("ssl_protocols"), |
| 1136 | 81 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
| 547 | 82 ngx_conf_set_bitmask_slot, |
| 1136 | 83 NGX_MAIL_SRV_CONF_OFFSET, |
| 84 offsetof(ngx_mail_ssl_conf_t, protocols), | |
| 85 &ngx_mail_ssl_protocols }, | |
| 547 | 86 |
| 539 | 87 { ngx_string("ssl_ciphers"), |
| 1136 | 88 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 539 | 89 ngx_conf_set_str_slot, |
| 1136 | 90 NGX_MAIL_SRV_CONF_OFFSET, |
| 91 offsetof(ngx_mail_ssl_conf_t, ciphers), | |
| 539 | 92 NULL }, |
| 93 | |
| 547 | 94 { ngx_string("ssl_prefer_server_ciphers"), |
| 1136 | 95 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG, |
| 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 |
| 976 | 101 { ngx_string("ssl_session_cache"), |
| 1136 | 102 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12, |
| 103 ngx_mail_ssl_session_cache, | |
| 104 NGX_MAIL_SRV_CONF_OFFSET, | |
| 976 | 105 0, |
| 106 NULL }, | |
| 107 | |
| 573 | 108 { ngx_string("ssl_session_timeout"), |
| 1136 | 109 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| 573 | 110 ngx_conf_set_sec_slot, |
| 1136 | 111 NGX_MAIL_SRV_CONF_OFFSET, |
| 112 offsetof(ngx_mail_ssl_conf_t, session_timeout), | |
| 573 | 113 NULL }, |
| 547 | 114 |
| 539 | 115 ngx_null_command |
| 116 }; | |
| 117 | |
| 118 | |
| 1136 | 119 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
|
120 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
|
121 |
| 539 | 122 NULL, /* create main configuration */ |
| 123 NULL, /* init main configuration */ | |
| 124 | |
| 1136 | 125 ngx_mail_ssl_create_conf, /* create server configuration */ |
| 126 ngx_mail_ssl_merge_conf /* merge server configuration */ | |
| 539 | 127 }; |
| 128 | |
| 129 | |
| 1136 | 130 ngx_module_t ngx_mail_ssl_module = { |
| 539 | 131 NGX_MODULE_V1, |
| 1136 | 132 &ngx_mail_ssl_module_ctx, /* module context */ |
| 133 ngx_mail_ssl_commands, /* module directives */ | |
| 134 NGX_MAIL_MODULE, /* module type */ | |
| 541 | 135 NULL, /* init master */ |
| 539 | 136 NULL, /* init module */ |
| 541 | 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 | |
| 539 | 143 }; |
| 144 | |
| 145 | |
| 1136 | 146 static ngx_str_t ngx_mail_ssl_sess_id_ctx = ngx_string("MAIL"); |
| 543 | 147 |
| 148 | |
| 539 | 149 static void * |
| 1136 | 150 ngx_mail_ssl_create_conf(ngx_conf_t *cf) |
| 577 | 151 { |
| 1136 | 152 ngx_mail_ssl_conf_t *scf; |
| 577 | 153 |
| 1136 | 154 scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t)); |
| 539 | 155 if (scf == NULL) { |
|
2912
c7d57b539248
return NULL instead of NGX_CONF_ERROR on a create conf failure
Igor Sysoev <igor@sysoev.ru>
parents:
2759
diff
changeset
|
156 return NULL; |
| 539 | 157 } |
| 158 | |
| 159 /* | |
| 577 | 160 * set by ngx_pcalloc(): |
| 539 | 161 * |
| 547 | 162 * scf->protocols = 0; |
| 2044 | 163 * scf->certificate = { 0, NULL }; |
| 164 * scf->certificate_key = { 0, NULL }; | |
| 165 * scf->dhparam = { 0, NULL }; | |
| 539 | 166 * scf->ciphers.len = 0; |
| 167 * scf->ciphers.data = NULL; | |
| 976 | 168 * scf->shm_zone = NULL; |
| 539 | 169 */ |
| 170 | |
| 171 scf->enable = NGX_CONF_UNSET; | |
| 2759 | 172 scf->starttls = NGX_CONF_UNSET_UINT; |
| 976 | 173 scf->prefer_server_ciphers = NGX_CONF_UNSET; |
| 174 scf->builtin_session_cache = NGX_CONF_UNSET; | |
| 573 | 175 scf->session_timeout = NGX_CONF_UNSET; |
| 539 | 176 |
| 177 return scf; | |
| 178 } | |
| 179 | |
| 180 | |
| 181 static char * | |
| 1136 | 182 ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
| 539 | 183 { |
| 1136 | 184 ngx_mail_ssl_conf_t *prev = parent; |
| 185 ngx_mail_ssl_conf_t *conf = child; | |
| 539 | 186 |
| 2224 | 187 char *mode; |
| 563 | 188 ngx_pool_cleanup_t *cln; |
| 189 | |
| 539 | 190 ngx_conf_merge_value(conf->enable, prev->enable, 0); |
| 2224 | 191 ngx_conf_merge_uint_value(conf->starttls, prev->starttls, |
| 192 NGX_MAIL_STARTTLS_OFF); | |
| 539 | 193 |
| 573 | 194 ngx_conf_merge_value(conf->session_timeout, |
| 195 prev->session_timeout, 300); | |
| 196 | |
| 547 | 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, | |
|
3190
dd2ae3872634
disable SSLv2 and low ciphers by default
Igor Sysoev <igor@sysoev.ru>
parents:
2996
diff
changeset
|
201 (NGX_CONF_BITMASK_SET|NGX_SSL_SSLv3|NGX_SSL_TLSv1)); |
| 547 | 202 |
| 2224 | 203 ngx_conf_merge_str_value(conf->certificate, prev->certificate, ""); |
| 204 ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, ""); | |
| 539 | 205 |
| 2044 | 206 ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, ""); |
| 207 | |
| 2124 | 208 ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS); |
| 539 | 209 |
| 210 | |
| 547 | 211 conf->ssl.log = cf->log; |
| 539 | 212 |
| 2224 | 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 | |
| 969 | 256 if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) { |
| 539 | 257 return NGX_CONF_ERROR; |
| 258 } | |
| 259 | |
| 563 | 260 cln = ngx_pool_cleanup_add(cf->pool, 0); |
| 261 if (cln == NULL) { | |
| 539 | 262 return NGX_CONF_ERROR; |
| 263 } | |
| 264 | |
| 563 | 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) | |
| 547 | 271 { |
| 272 return NGX_CONF_ERROR; | |
| 273 } | |
| 539 | 274 |
| 275 if (conf->ciphers.len) { | |
| 547 | 276 if (SSL_CTX_set_cipher_list(conf->ssl.ctx, |
| 563 | 277 (const char *) conf->ciphers.data) |
| 278 == 0) | |
| 539 | 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 | |
| 563 | 286 if (conf->prefer_server_ciphers) { |
| 287 SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); | |
| 288 } | |
| 289 | |
| 547 | 290 if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) { |
| 539 | 291 return NGX_CONF_ERROR; |
| 292 } | |
| 293 | |
| 2044 | 294 if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) { |
| 295 return NGX_CONF_ERROR; | |
| 296 } | |
| 297 | |
| 976 | 298 ngx_conf_merge_value(conf->builtin_session_cache, |
| 2032 | 299 prev->builtin_session_cache, NGX_SSL_NONE_SCACHE); |
| 976 | 300 |
| 301 if (conf->shm_zone == NULL) { | |
| 302 conf->shm_zone = prev->shm_zone; | |
| 303 } | |
| 539 | 304 |
| 1136 | 305 if (ngx_ssl_session_cache(&conf->ssl, &ngx_mail_ssl_sess_id_ctx, |
| 976 | 306 conf->builtin_session_cache, |
| 307 conf->shm_zone, conf->session_timeout) | |
| 308 != NGX_OK) | |
| 309 { | |
| 310 return NGX_CONF_ERROR; | |
| 311 } | |
| 573 | 312 |
| 539 | 313 return NGX_CONF_OK; |
| 314 } | |
| 563 | 315 |
| 577 | 316 |
| 976 | 317 static char * |
| 2224 | 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 * | |
| 1136 | 370 ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 976 | 371 { |
| 1136 | 372 ngx_mail_ssl_conf_t *scf = conf; |
| 976 | 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 | |
| 1778 | 383 if (ngx_strcmp(value[i].data, "off") == 0) { |
| 384 scf->builtin_session_cache = NGX_SSL_NO_SCACHE; | |
| 385 continue; | |
| 386 } | |
| 387 | |
| 2032 | 388 if (ngx_strcmp(value[i].data, "none") == 0) { |
| 389 scf->builtin_session_cache = NGX_SSL_NONE_SCACHE; | |
| 390 continue; | |
| 391 } | |
| 392 | |
| 976 | 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, | |
| 1136 | 453 &ngx_mail_ssl_module); |
| 976 | 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 } |