| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| |
| typedef ngx_int_t (*ngx_ssl_variable_handler_pt)(ngx_connection_t *c, |
| ngx_pool_t *pool, ngx_str_t *s); |
| |
| |
| #define NGX_DEFAULT_CIPHERS "HIGH:!ADH:!MD5" |
| |
| |
| static ngx_int_t ngx_http_ssl_static_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| |
| static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf); |
| static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf); |
| static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, |
| void *parent, void *child); |
| |
| static char *ngx_http_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| static char *ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| |
| |
| static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = { |
| { ngx_string("SSLv2"), NGX_SSL_SSLv2 }, |
| { ngx_string("SSLv3"), NGX_SSL_SSLv3 }, |
| { ngx_string("TLSv1"), NGX_SSL_TLSv1 }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| static ngx_conf_enum_t ngx_http_ssl_verify[] = { |
| { ngx_string("off"), 0 }, |
| { ngx_string("on"), 1 }, |
| { ngx_string("optional"), 2 }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| static ngx_command_t ngx_http_ssl_commands[] = { |
| |
| { ngx_string("ssl"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
| ngx_http_ssl_enable, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, enable), |
| NULL }, |
| |
| { ngx_string("ssl_certificate"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_str_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, certificate), |
| NULL }, |
| |
| { ngx_string("ssl_certificate_key"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_str_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, certificate_key), |
| NULL }, |
| |
| { ngx_string("ssl_dhparam"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_str_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, dhparam), |
| NULL }, |
| |
| { ngx_string("ssl_protocols"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE, |
| ngx_conf_set_bitmask_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, protocols), |
| &ngx_http_ssl_protocols }, |
| |
| { ngx_string("ssl_ciphers"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_str_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, ciphers), |
| NULL }, |
| |
| { ngx_string("ssl_verify_client"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
| ngx_conf_set_enum_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, verify), |
| &ngx_http_ssl_verify }, |
| |
| { ngx_string("ssl_verify_depth"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE, |
| ngx_conf_set_num_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, verify_depth), |
| NULL }, |
| |
| { ngx_string("ssl_client_certificate"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_str_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, client_certificate), |
| NULL }, |
| |
| { ngx_string("ssl_prefer_server_ciphers"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, |
| ngx_conf_set_flag_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers), |
| NULL }, |
| |
| { ngx_string("ssl_session_cache"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE12, |
| ngx_http_ssl_session_cache, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| 0, |
| NULL }, |
| |
| { ngx_string("ssl_session_timeout"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_sec_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, session_timeout), |
| NULL }, |
| |
| { ngx_string("ssl_crl"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_str_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, crl), |
| NULL }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_http_module_t ngx_http_ssl_module_ctx = { |
| ngx_http_ssl_add_variables, /* preconfiguration */ |
| NULL, /* postconfiguration */ |
| |
| NULL, /* create main configuration */ |
| NULL, /* init main configuration */ |
| |
| ngx_http_ssl_create_srv_conf, /* create server configuration */ |
| ngx_http_ssl_merge_srv_conf, /* merge server configuration */ |
| |
| NULL, /* create location configuration */ |
| NULL /* merge location configuration */ |
| }; |
| |
| |
| ngx_module_t ngx_http_ssl_module = { |
| NGX_MODULE_V1, |
| &ngx_http_ssl_module_ctx, /* module context */ |
| ngx_http_ssl_commands, /* module directives */ |
| NGX_HTTP_MODULE, /* module type */ |
| NULL, /* init master */ |
| NULL, /* init module */ |
| NULL, /* init process */ |
| NULL, /* init thread */ |
| NULL, /* exit thread */ |
| NULL, /* exit process */ |
| NULL, /* exit master */ |
| NGX_MODULE_V1_PADDING |
| }; |
| |
| |
| static ngx_http_variable_t ngx_http_ssl_vars[] = { |
| |
| { ngx_string("ssl_protocol"), NULL, ngx_http_ssl_static_variable, |
| (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_static_variable, |
| (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_session_id"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_session_id, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_client_cert"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_certificate, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_client_raw_cert"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_raw_certificate, |
| NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_subject_dn, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_issuer_dn, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_client_serial"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_serial_number, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_string("ssl_client_verify"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_client_verify, NGX_HTTP_VAR_CHANGEABLE, 0 }, |
| |
| { ngx_null_string, NULL, NULL, 0, 0, 0 } |
| }; |
| |
| |
| static ngx_str_t ngx_http_ssl_sess_id_ctx = ngx_string("HTTP"); |
| |
| |
| static ngx_int_t |
| ngx_http_ssl_static_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data) |
| { |
| ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data; |
| |
| size_t len; |
| ngx_str_t s; |
| |
| if (r->connection->ssl) { |
| |
| (void) handler(r->connection, NULL, &s); |
| |
| v->data = s.data; |
| |
| for (len = 0; v->data[len]; len++) { /* void */ } |
| |
| v->len = len; |
| v->valid = 1; |
| v->no_cacheable = 0; |
| v->not_found = 0; |
| |
| return NGX_OK; |
| } |
| |
| v->not_found = 1; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_ssl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, |
| uintptr_t data) |
| { |
| ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data; |
| |
| ngx_str_t s; |
| |
| if (r->connection->ssl) { |
| |
| if (handler(r->connection, r->pool, &s) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| v->len = s.len; |
| v->data = s.data; |
| |
| if (v->len) { |
| v->valid = 1; |
| v->no_cacheable = 0; |
| v->not_found = 0; |
| |
| return NGX_OK; |
| } |
| } |
| |
| v->not_found = 1; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_ssl_add_variables(ngx_conf_t *cf) |
| { |
| ngx_http_variable_t *var, *v; |
| |
| for (v = ngx_http_ssl_vars; v->name.len; v++) { |
| var = ngx_http_add_variable(cf, &v->name, v->flags); |
| if (var == NULL) { |
| return NGX_ERROR; |
| } |
| |
| var->get_handler = v->get_handler; |
| var->data = v->data; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static void * |
| ngx_http_ssl_create_srv_conf(ngx_conf_t *cf) |
| { |
| ngx_http_ssl_srv_conf_t *sscf; |
| |
| sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t)); |
| if (sscf == NULL) { |
| return NULL; |
| } |
| |
| /* |
| * set by ngx_pcalloc(): |
| * |
| * sscf->protocols = 0; |
| * sscf->certificate = { 0, NULL }; |
| * sscf->certificate_key = { 0, NULL }; |
| * sscf->dhparam = { 0, NULL }; |
| * sscf->client_certificate = { 0, NULL }; |
| * sscf->crl = { 0, NULL }; |
| * sscf->ciphers = { 0, NULL }; |
| * sscf->shm_zone = NULL; |
| */ |
| |
| sscf->enable = NGX_CONF_UNSET; |
| sscf->prefer_server_ciphers = NGX_CONF_UNSET; |
| sscf->verify = NGX_CONF_UNSET_UINT; |
| sscf->verify_depth = NGX_CONF_UNSET_UINT; |
| sscf->builtin_session_cache = NGX_CONF_UNSET; |
| sscf->session_timeout = NGX_CONF_UNSET; |
| |
| return sscf; |
| } |
| |
| |
| static char * |
| ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
| { |
| ngx_http_ssl_srv_conf_t *prev = parent; |
| ngx_http_ssl_srv_conf_t *conf = child; |
| |
| ngx_pool_cleanup_t *cln; |
| |
| ngx_conf_merge_value(conf->enable, prev->enable, 0); |
| |
| ngx_conf_merge_value(conf->session_timeout, |
| prev->session_timeout, 300); |
| |
| ngx_conf_merge_value(conf->prefer_server_ciphers, |
| prev->prefer_server_ciphers, 0); |
| |
| ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols, |
| (NGX_CONF_BITMASK_SET|NGX_SSL_SSLv3|NGX_SSL_TLSv1)); |
| |
| ngx_conf_merge_uint_value(conf->verify, prev->verify, 0); |
| ngx_conf_merge_uint_value(conf->verify_depth, prev->verify_depth, 1); |
| |
| ngx_conf_merge_str_value(conf->certificate, prev->certificate, ""); |
| ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, ""); |
| |
| ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, ""); |
| |
| ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate, |
| ""); |
| ngx_conf_merge_str_value(conf->crl, prev->crl, ""); |
| |
| ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS); |
| |
| |
| conf->ssl.log = cf->log; |
| |
| if (conf->enable) { |
| |
| if (conf->certificate.len == 0) { |
| ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
| "no \"ssl_certificate\" is defined for " |
| "the \"ssl\" directive in %s:%ui", |
| conf->file, conf->line); |
| return NGX_CONF_ERROR; |
| } |
| |
| if (conf->certificate_key.len == 0) { |
| ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
| "no \"ssl_certificate_key\" is defined for " |
| "the \"ssl\" directive in %s:%ui", |
| conf->file, conf->line); |
| return NGX_CONF_ERROR; |
| } |
| |
| } else { |
| |
| if (conf->certificate.len == 0) { |
| return NGX_CONF_OK; |
| } |
| |
| if (conf->certificate_key.len == 0) { |
| ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
| "no \"ssl_certificate_key\" is defined " |
| "for certificate \"%V\"", &conf->certificate); |
| return NGX_CONF_ERROR; |
| } |
| } |
| |
| if (ngx_ssl_create(&conf->ssl, conf->protocols, conf) != NGX_OK) { |
| return NGX_CONF_ERROR; |
| } |
| |
| #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME |
| |
| if (SSL_CTX_set_tlsext_servername_callback(conf->ssl.ctx, |
| ngx_http_ssl_servername) |
| == 0) |
| { |
| ngx_log_error(NGX_LOG_WARN, cf->log, 0, |
| "nginx was built with SNI support, however, now it is linked " |
| "dynamically to an OpenSSL library which has no tlsext support, " |
| "therefore SNI is not available"); |
| } |
| |
| #endif |
| |
| cln = ngx_pool_cleanup_add(cf->pool, 0); |
| if (cln == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| cln->handler = ngx_ssl_cleanup_ctx; |
| cln->data = &conf->ssl; |
| |
| if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate, |
| &conf->certificate_key) |
| != NGX_OK) |
| { |
| return NGX_CONF_ERROR; |
| } |
| |
| if (SSL_CTX_set_cipher_list(conf->ssl.ctx, |
| (const char *) conf->ciphers.data) |
| == 0) |
| { |
| ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, |
| "SSL_CTX_set_cipher_list(\"%V\") failed", |
| &conf->ciphers); |
| } |
| |
| if (conf->verify) { |
| |
| if (conf->client_certificate.len == 0) { |
| ngx_log_error(NGX_LOG_EMERG, cf->log, 0, |
| "no ssl_client_certificate for ssl_client_verify"); |
| return NGX_CONF_ERROR; |
| } |
| |
| if (ngx_ssl_client_certificate(cf, &conf->ssl, |
| &conf->client_certificate, |
| conf->verify_depth) |
| != NGX_OK) |
| { |
| return NGX_CONF_ERROR; |
| } |
| |
| if (ngx_ssl_crl(cf, &conf->ssl, &conf->crl) != NGX_OK) { |
| return NGX_CONF_ERROR; |
| } |
| } |
| |
| if (conf->prefer_server_ciphers) { |
| SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); |
| } |
| |
| /* a temporary 512-bit RSA key is required for export versions of MSIE */ |
| if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) { |
| return NGX_CONF_ERROR; |
| } |
| |
| if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) { |
| return NGX_CONF_ERROR; |
| } |
| |
| ngx_conf_merge_value(conf->builtin_session_cache, |
| prev->builtin_session_cache, NGX_SSL_NONE_SCACHE); |
| |
| if (conf->shm_zone == NULL) { |
| conf->shm_zone = prev->shm_zone; |
| } |
| |
| if (ngx_ssl_session_cache(&conf->ssl, &ngx_http_ssl_sess_id_ctx, |
| conf->builtin_session_cache, |
| conf->shm_zone, conf->session_timeout) |
| != NGX_OK) |
| { |
| return NGX_CONF_ERROR; |
| } |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static char * |
| ngx_http_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| { |
| ngx_http_ssl_srv_conf_t *sscf = conf; |
| |
| char *rv; |
| |
| rv = ngx_conf_set_flag_slot(cf, cmd, conf); |
| |
| if (rv != NGX_CONF_OK) { |
| return rv; |
| } |
| |
| sscf->file = cf->conf_file->file.name.data; |
| sscf->line = cf->conf_file->line; |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static char * |
| ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| { |
| ngx_http_ssl_srv_conf_t *sscf = conf; |
| |
| size_t len; |
| ngx_str_t *value, name, size; |
| ngx_int_t n; |
| ngx_uint_t i, j; |
| |
| value = cf->args->elts; |
| |
| for (i = 1; i < cf->args->nelts; i++) { |
| |
| if (ngx_strcmp(value[i].data, "off") == 0) { |
| sscf->builtin_session_cache = NGX_SSL_NO_SCACHE; |
| continue; |
| } |
| |
| if (ngx_strcmp(value[i].data, "none") == 0) { |
| sscf->builtin_session_cache = NGX_SSL_NONE_SCACHE; |
| continue; |
| } |
| |
| if (ngx_strcmp(value[i].data, "builtin") == 0) { |
| sscf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE; |
| continue; |
| } |
| |
| if (value[i].len > sizeof("builtin:") - 1 |
| && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1) |
| == 0) |
| { |
| n = ngx_atoi(value[i].data + sizeof("builtin:") - 1, |
| value[i].len - (sizeof("builtin:") - 1)); |
| |
| if (n == NGX_ERROR) { |
| goto invalid; |
| } |
| |
| sscf->builtin_session_cache = n; |
| |
| continue; |
| } |
| |
| if (value[i].len > sizeof("shared:") - 1 |
| && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1) |
| == 0) |
| { |
| len = 0; |
| |
| for (j = sizeof("shared:") - 1; j < value[i].len; j++) { |
| if (value[i].data[j] == ':') { |
| value[i].data[j] = '\0'; |
| break; |
| } |
| |
| len++; |
| } |
| |
| if (len == 0) { |
| goto invalid; |
| } |
| |
| name.len = len; |
| name.data = value[i].data + sizeof("shared:") - 1; |
| |
| size.len = value[i].len - j - 1; |
| size.data = name.data + len + 1; |
| |
| n = ngx_parse_size(&size); |
| |
| if (n == NGX_ERROR) { |
| goto invalid; |
| } |
| |
| if (n < (ngx_int_t) (8 * ngx_pagesize)) { |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "session cache \"%V\" is too small", |
| &value[i]); |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| sscf->shm_zone = ngx_shared_memory_add(cf, &name, n, |
| &ngx_http_ssl_module); |
| if (sscf->shm_zone == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| continue; |
| } |
| |
| goto invalid; |
| } |
| |
| if (sscf->shm_zone && sscf->builtin_session_cache == NGX_CONF_UNSET) { |
| sscf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE; |
| } |
| |
| return NGX_CONF_OK; |
| |
| invalid: |
| |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "invalid session cache \"%V\"", &value[i]); |
| |
| return NGX_CONF_ERROR; |
| } |
