| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| |
| typedef u_char *(*ngx_ssl_variable_handler_pt)(ngx_connection_t *); |
| |
| |
| #define NGX_DEFLAUT_CERTIFICATE "cert.pem" |
| #define NGX_DEFLAUT_CERTIFICATE_KEY "cert.pem" |
| #define NGX_DEFLAUT_CIPHERS "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP" |
| |
| |
| static int ngx_http_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store); |
| 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_client_s_dn(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_ssl_client_i_dn(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); |
| |
| #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
| |
| static char *ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| |
| static char ngx_http_ssl_openssl097[] = "OpenSSL 0.9.7 and higher"; |
| |
| #endif |
| |
| |
| 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_command_t ngx_http_ssl_commands[] = { |
| |
| { ngx_string("ssl"), |
| 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, 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_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_flag_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, verify), |
| NULL }, |
| |
| { 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, |
| #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
| ngx_conf_set_flag_slot, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers), |
| NULL }, |
| #else |
| ngx_http_ssl_nosupported, 0, 0, ngx_http_ssl_openssl097 }, |
| #endif |
| |
| { 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_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_variable, |
| (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGABLE, 0 }, |
| |
| { ngx_string("ssl_cipher"), NULL, ngx_http_ssl_variable, |
| (uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGABLE, 0 }, |
| |
| { ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_client_s_dn, |
| 0, NGX_HTTP_VAR_CHANGABLE, 0 }, |
| |
| { ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_client_i_dn, |
| 0, NGX_HTTP_VAR_CHANGABLE, 0 }, |
| |
| { ngx_null_string, NULL, NULL, 0, 0, 0 } |
| }; |
| |
| |
| static u_char ngx_http_session_id_ctx[] = "HTTP"; |
| |
| |
| 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; |
| |
| size_t len; |
| u_char *name; |
| |
| if (r->connection->ssl) { |
| |
| name = handler(r->connection); |
| |
| for (len = 0; name[len]; len++) { /* void */ } |
| |
| v->len = len; |
| v->valid = 1; |
| v->no_cachable = 0; |
| v->not_found = 0; |
| v->data = name; |
| |
| return NGX_OK; |
| } |
| |
| v->not_found = 1; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_ssl_client_s_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v, |
| uintptr_t data) |
| { |
| if (r->connection->ssl) { |
| if (ngx_ssl_get_subject_dn(r->connection, r->pool, (ngx_str_t *) v) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| if (v->len) { |
| v->valid = 1; |
| v->no_cachable = 0; |
| v->not_found = 0; |
| |
| return NGX_OK; |
| } |
| } |
| |
| v->not_found = 1; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_ssl_client_i_dn(ngx_http_request_t *r, ngx_http_variable_value_t *v, |
| uintptr_t data) |
| { |
| if (r->connection->ssl) { |
| if (ngx_ssl_get_issuer_dn(r->connection, r->pool, (ngx_str_t *) v) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| if (v->len) { |
| v->valid = 1; |
| v->no_cachable = 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 *scf; |
| |
| scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t)); |
| if (scf == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| /* |
| * set by ngx_pcalloc(): |
| * |
| * scf->protocols = 0; |
| |
| * scf->certificate.len = 0; |
| * scf->certificate.data = NULL; |
| * scf->certificate_key.len = 0; |
| * scf->certificate_key.data = NULL; |
| * scf->client_certificate.len = 0; |
| * scf->client_certificate.data = NULL; |
| * scf->ciphers.len = 0; |
| * scf->ciphers.data = NULL; |
| */ |
| |
| scf->enable = NGX_CONF_UNSET; |
| scf->session_timeout = NGX_CONF_UNSET; |
| scf->verify = NGX_CONF_UNSET; |
| scf->verify_depth = NGX_CONF_UNSET; |
| scf->prefer_server_ciphers = NGX_CONF_UNSET; |
| |
| return scf; |
| } |
| |
| |
| 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); |
| |
| if (conf->enable == 0) { |
| return NGX_CONF_OK; |
| } |
| |
| 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_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1)); |
| |
| ngx_conf_merge_value(conf->verify, prev->verify, 0); |
| ngx_conf_merge_value(conf->verify_depth, prev->verify_depth, 1); |
| |
| ngx_conf_merge_str_value(conf->certificate, prev->certificate, |
| NGX_DEFLAUT_CERTIFICATE); |
| |
| ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, |
| NGX_DEFLAUT_CERTIFICATE_KEY); |
| |
| ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate, |
| ""); |
| |
| ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS); |
| |
| |
| conf->ssl.log = cf->log; |
| |
| if (ngx_ssl_create(&conf->ssl, conf->protocols) != NGX_OK) { |
| return NGX_CONF_ERROR; |
| } |
| |
| 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) { |
| SSL_CTX_set_verify(conf->ssl.ctx, NGX_SSL_VERIFY, |
| ngx_http_ssl_verify_callback); |
| |
| SSL_CTX_set_verify_depth(conf->ssl.ctx, conf->verify_depth); |
| |
| if (conf->client_certificate.len) { |
| if (ngx_ssl_client_certificate(cf, &conf->ssl, |
| &conf->client_certificate) |
| != NGX_OK) |
| { |
| return NGX_CONF_ERROR; |
| } |
| } |
| } |
| |
| #ifdef SSL_OP_CIPHER_SERVER_PREFERENCE |
| |
| if (conf->prefer_server_ciphers) { |
| SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); |
| } |
| |
| #endif |
| |
| /* 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; |
| } |
| |
| SSL_CTX_set_session_cache_mode(conf->ssl.ctx, SSL_SESS_CACHE_SERVER); |
| |
| SSL_CTX_set_session_id_context(conf->ssl.ctx, ngx_http_session_id_ctx, |
| sizeof(ngx_http_session_id_ctx) - 1); |
| |
| SSL_CTX_set_timeout(conf->ssl.ctx, conf->session_timeout); |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static int |
| ngx_http_ssl_verify_callback(int ok, X509_STORE_CTX *x509_store) |
| { |
| return 1; |
| } |
| |
| |
| #if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE) |
| |
| static char * |
| ngx_http_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| { |
| ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| "\"%V\" directive is available only in %s,", |
| &cmd->name, cmd->post); |
| |
| return NGX_CONF_ERROR; |
| } |
| |
| #endif |
