| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #include <assert.h> |
| #include <apr_lib.h> |
| #include <apr_strings.h> |
| #include <apr_network_io.h> |
| |
| #include <httpd.h> |
| #include <http_core.h> |
| #include <http_log.h> |
| #include <http_protocol.h> |
| #include <http_ssl.h> |
| #include <http_vhost.h> |
| #include <http_main.h> |
| #include <ap_socache.h> |
| |
| #include <rustls.h> |
| |
| #include "tls_proto.h" |
| #include "tls_cert.h" |
| #include "tls_conf.h" |
| #include "tls_core.h" |
| #include "tls_ocsp.h" |
| #include "tls_util.h" |
| #include "tls_cache.h" |
| #include "tls_var.h" |
| |
| |
| extern module AP_MODULE_DECLARE_DATA tls_module; |
| APLOG_USE_MODULE(tls); |
| |
| tls_conf_conn_t *tls_conf_conn_get(conn_rec *c) |
| { |
| return ap_get_module_config(c->conn_config, &tls_module); |
| } |
| |
| void tls_conf_conn_set(conn_rec *c, tls_conf_conn_t *cc) |
| { |
| ap_set_module_config(c->conn_config, &tls_module, cc); |
| } |
| |
| int tls_conn_check_ssl(conn_rec *c) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c->master? c->master : c); |
| if (TLS_CONN_ST_IS_ENABLED(cc)) { |
| return OK; |
| } |
| return DECLINED; |
| } |
| |
| static int we_listen_on(tls_conf_global_t *gc, server_rec *s, tls_conf_server_t *sc) |
| { |
| server_addr_rec *sa, *la; |
| |
| if (gc->tls_addresses && sc->base_server) { |
| /* The base server listens to every port and may be selected via SNI */ |
| return 1; |
| } |
| for (la = gc->tls_addresses; la; la = la->next) { |
| for (sa = s->addrs; sa; sa = sa->next) { |
| if (la->host_port == sa->host_port |
| && la->host_addr->ipaddr_len == sa->host_addr->ipaddr_len |
| && !memcmp(la->host_addr->ipaddr_ptr, |
| la->host_addr->ipaddr_ptr, (size_t)la->host_addr->ipaddr_len)) { |
| /* exact match */ |
| return 1; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| static apr_status_t tls_core_free(void *data) |
| { |
| server_rec *base_server = (server_rec *)data; |
| tls_conf_server_t *sc = tls_conf_server_get(base_server); |
| |
| if (sc && sc->global && sc->global->rustls_hello_config) { |
| rustls_server_config_free(sc->global->rustls_hello_config); |
| sc->global->rustls_hello_config = NULL; |
| } |
| tls_cache_free(base_server); |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t load_certified_keys( |
| apr_array_header_t *keys, server_rec *s, |
| apr_array_header_t *cert_specs, |
| tls_cert_reg_t *cert_reg) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| const rustls_certified_key *ckey; |
| tls_cert_spec_t *spec; |
| int i; |
| |
| if (cert_specs && cert_specs->nelts > 0) { |
| for (i = 0; i < cert_specs->nelts; ++i) { |
| spec = APR_ARRAY_IDX(cert_specs, i, tls_cert_spec_t*); |
| rv = tls_cert_reg_get_certified_key(cert_reg, s, spec, &ckey); |
| if (APR_SUCCESS != rv) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10318) |
| "Failed to load certificate %d[cert=%s(%d), key=%s(%d)] for %s", |
| i, spec->cert_file, (int)(spec->cert_pem? strlen(spec->cert_pem) : 0), |
| spec->pkey_file, (int)(spec->pkey_pem? strlen(spec->pkey_pem) : 0), |
| s->server_hostname); |
| goto cleanup; |
| } |
| assert(ckey); |
| APR_ARRAY_PUSH(keys, const rustls_certified_key*) = ckey; |
| } |
| } |
| cleanup: |
| return rv; |
| } |
| |
| static apr_status_t use_local_key( |
| conn_rec *c, const char *cert_pem, const char *pkey_pem) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| const rustls_certified_key *ckey = NULL; |
| tls_cert_spec_t spec; |
| apr_status_t rv = APR_SUCCESS; |
| |
| memset(&spec, 0, sizeof(spec)); |
| spec.cert_pem = cert_pem; |
| spec.pkey_pem = pkey_pem; |
| rv = tls_cert_load_cert_key(c->pool, &spec, NULL, &ckey); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| cc->local_keys = apr_array_make(c->pool, 2, sizeof(const rustls_certified_key*)); |
| APR_ARRAY_PUSH(cc->local_keys, const rustls_certified_key*) = ckey; |
| ckey = NULL; |
| |
| cleanup: |
| if (ckey != NULL) rustls_certified_key_free(ckey); |
| return rv; |
| } |
| |
| static void add_file_specs( |
| apr_array_header_t *certificates, |
| apr_pool_t *p, |
| apr_array_header_t *cert_files, |
| apr_array_header_t *key_files) |
| { |
| tls_cert_spec_t *spec; |
| int i; |
| |
| for (i = 0; i < cert_files->nelts; ++i) { |
| spec = apr_pcalloc(p, sizeof(*spec)); |
| spec->cert_file = APR_ARRAY_IDX(cert_files, i, const char*); |
| spec->pkey_file = (i < key_files->nelts)? APR_ARRAY_IDX(key_files, i, const char*) : NULL; |
| *(const tls_cert_spec_t**)apr_array_push(certificates) = spec; |
| } |
| } |
| |
| static apr_status_t calc_ciphers( |
| apr_pool_t *pool, |
| server_rec *s, |
| tls_conf_global_t *gc, |
| const char *proxy, |
| apr_array_header_t *pref_ciphers, |
| apr_array_header_t *supp_ciphers, |
| const apr_array_header_t **pciphers) |
| { |
| apr_array_header_t *ordered_ciphers; |
| const apr_array_header_t *ciphers; |
| apr_array_header_t *unsupported = NULL; |
| rustls_result rr = RUSTLS_RESULT_OK; |
| apr_status_t rv = APR_SUCCESS; |
| apr_uint16_t id; |
| int i; |
| |
| |
| /* remove all suppressed ciphers from the ones supported by rustls */ |
| ciphers = tls_util_array_uint16_remove(pool, gc->proto->supported_cipher_ids, supp_ciphers); |
| ordered_ciphers = NULL; |
| /* if preferred ciphers are actually still present in allowed_ciphers, put |
| * them into `ciphers` in this order */ |
| for (i = 0; i < pref_ciphers->nelts; ++i) { |
| id = APR_ARRAY_IDX(pref_ciphers, i, apr_uint16_t); |
| ap_log_error(APLOG_MARK, APLOG_TRACE4, rv, s, |
| "checking preferred cipher %s: %d", |
| s->server_hostname, id); |
| if (tls_util_array_uint16_contains(ciphers, id)) { |
| ap_log_error(APLOG_MARK, APLOG_TRACE4, rv, s, |
| "checking preferred cipher %s: %d is known", |
| s->server_hostname, id); |
| if (ordered_ciphers == NULL) { |
| ordered_ciphers = apr_array_make(pool, ciphers->nelts, sizeof(apr_uint16_t)); |
| } |
| APR_ARRAY_PUSH(ordered_ciphers, apr_uint16_t) = id; |
| } |
| else if (!tls_proto_is_cipher_supported(gc->proto, id)) { |
| ap_log_error(APLOG_MARK, APLOG_TRACE4, rv, s, |
| "checking preferred cipher %s: %d is unsupported", |
| s->server_hostname, id); |
| if (!unsupported) unsupported = apr_array_make(pool, 5, sizeof(apr_uint16_t)); |
| APR_ARRAY_PUSH(unsupported, apr_uint16_t) = id; |
| } |
| } |
| /* if we found ciphers with preference among allowed_ciphers, |
| * append all other allowed ciphers. */ |
| if (ordered_ciphers) { |
| for (i = 0; i < ciphers->nelts; ++i) { |
| id = APR_ARRAY_IDX(ciphers, i, apr_uint16_t); |
| if (!tls_util_array_uint16_contains(ordered_ciphers, id)) { |
| APR_ARRAY_PUSH(ordered_ciphers, apr_uint16_t) = id; |
| } |
| } |
| ciphers = ordered_ciphers; |
| } |
| |
| if (ciphers == gc->proto->supported_cipher_ids) { |
| ciphers = NULL; |
| } |
| |
| if (unsupported && unsupported->nelts) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, rv, s, APLOGNO(10319) |
| "Server '%s' has TLS%sCiphersPrefer configured that are not " |
| "supported by rustls. These will not have an effect: %s", |
| s->server_hostname, proxy, |
| tls_proto_get_cipher_names(gc->proto, unsupported, pool)); |
| } |
| |
| if (RUSTLS_RESULT_OK != rr) { |
| const char *err_descr; |
| rv = tls_util_rustls_error(pool, rr, &err_descr); |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10320) |
| "Failed to configure ciphers %s: [%d] %s", |
| s->server_hostname, (int)rr, err_descr); |
| } |
| *pciphers = (APR_SUCCESS == rv)? ciphers : NULL; |
| return rv; |
| } |
| |
| static apr_status_t get_server_ciphersuites( |
| const apr_array_header_t **pciphersuites, |
| apr_pool_t *pool, tls_conf_server_t *sc) |
| { |
| const apr_array_header_t *ciphers, *suites = NULL; |
| apr_status_t rv = APR_SUCCESS; |
| |
| rv = calc_ciphers(pool, sc->server, sc->global, |
| "", sc->tls_pref_ciphers, sc->tls_supp_ciphers, |
| &ciphers); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| if (ciphers) { |
| suites = tls_proto_get_rustls_suites( |
| sc->global->proto, ciphers, pool); |
| if (APLOGtrace2(sc->server)) { |
| tls_proto_conf_t *conf = sc->global->proto; |
| ap_log_error(APLOG_MARK, APLOG_TRACE2, 0, sc->server, |
| "tls ciphers configured[%s]: %s", |
| sc->server->server_hostname, |
| tls_proto_get_cipher_names(conf, ciphers, pool)); |
| } |
| } |
| |
| cleanup: |
| *pciphersuites = (APR_SUCCESS == rv)? suites : NULL; |
| return rv; |
| } |
| |
| static apr_array_header_t *complete_cert_specs( |
| apr_pool_t *p, tls_conf_server_t *sc) |
| { |
| apr_array_header_t *cert_adds, *key_adds, *specs; |
| |
| /* Take the configured certificate specifications and ask |
| * around for other modules to add specifications to this server. |
| * This is the way mod_md provides certificates. |
| * |
| * If the server then still has no cert specifications, ask |
| * around for `fallback` certificates which are commonly self-signed, |
| * temporary ones which let the server startup in order to |
| * obtain the `real` certificates from sources like ACME. |
| * Servers will fallbacks will answer all requests with 503. |
| */ |
| specs = apr_array_copy(p, sc->cert_specs); |
| cert_adds = apr_array_make(p, 2, sizeof(const char*)); |
| key_adds = apr_array_make(p, 2, sizeof(const char*)); |
| |
| ap_ssl_add_cert_files(sc->server, p, cert_adds, key_adds); |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, sc->server, |
| "init server: complete_cert_specs added %d certs", cert_adds->nelts); |
| add_file_specs(specs, p, cert_adds, key_adds); |
| |
| if (apr_is_empty_array(specs)) { |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, sc->server, |
| "init server: no certs configured, looking for fallback"); |
| ap_ssl_add_fallback_cert_files(sc->server, p, cert_adds, key_adds); |
| if (cert_adds->nelts > 0) { |
| add_file_specs(specs, p, cert_adds, key_adds); |
| sc->service_unavailable = 1; |
| ap_log_error(APLOG_MARK, APLOG_INFO, 0, sc->server, APLOGNO(10321) |
| "Init: %s will respond with '503 Service Unavailable' for now. There " |
| "are no SSL certificates configured and no other module contributed any.", |
| sc->server->server_hostname); |
| } |
| else if (!sc->base_server) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, sc->server, APLOGNO(10322) |
| "Init: %s has no certificates configured. Use 'TLSCertificate' to " |
| "configure a certificate and key file.", |
| sc->server->server_hostname); |
| } |
| } |
| return specs; |
| } |
| |
| static const rustls_certified_key *select_certified_key( |
| void* userdata, const rustls_client_hello *hello) |
| { |
| conn_rec *c = userdata; |
| tls_conf_conn_t *cc; |
| tls_conf_server_t *sc; |
| apr_array_header_t *keys; |
| const rustls_certified_key *clone; |
| rustls_result rr = RUSTLS_RESULT_OK; |
| apr_status_t rv; |
| |
| ap_assert(c); |
| cc = tls_conf_conn_get(c); |
| ap_assert(cc); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, "client hello select certified key"); |
| if (!cc || !cc->server) goto cleanup; |
| sc = tls_conf_server_get(cc->server); |
| if (!sc) goto cleanup; |
| |
| cc->key = NULL; |
| cc->key_cloned = 0; |
| if (cc->local_keys && cc->local_keys->nelts > 0) { |
| keys = cc->local_keys; |
| } |
| else { |
| keys = sc->certified_keys; |
| } |
| if (!keys || keys->nelts <= 0) goto cleanup; |
| |
| rr = rustls_client_hello_select_certified_key(hello, |
| (const rustls_certified_key**)keys->elts, (size_t)keys->nelts, &cc->key); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| |
| if (APR_SUCCESS == tls_ocsp_update_key(c, cc->key, &clone)) { |
| /* got OCSP response data for it, meaning the key was cloned and we need to remember */ |
| cc->key_cloned = 1; |
| cc->key = clone; |
| } |
| if (APLOGctrace2(c)) { |
| const char *key_id = tls_cert_reg_get_id(sc->global->cert_reg, cc->key); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, APLOGNO(10323) |
| "client hello selected key: %s", key_id? key_id : "unknown"); |
| } |
| return cc->key; |
| |
| cleanup: |
| if (RUSTLS_RESULT_OK != rr) { |
| const char *err_descr; |
| rv = tls_util_rustls_error(c->pool, rr, &err_descr); |
| ap_log_cerror(APLOG_MARK, APLOG_ERR, rv, c, APLOGNO(10324) |
| "Failed to select certified key: [%d] %s", (int)rr, err_descr); |
| } |
| return NULL; |
| } |
| |
| static apr_status_t server_conf_setup( |
| apr_pool_t *p, apr_pool_t *ptemp, tls_conf_server_t *sc, tls_conf_global_t *gc) |
| { |
| apr_array_header_t *cert_specs; |
| apr_status_t rv = APR_SUCCESS; |
| |
| /* TODO: most code has been stripped here with the changes in rustls-ffi v0.8.0 |
| * and this means that any errors are only happening at connection setup, which |
| * is too late. |
| */ |
| (void)p; |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, rv, sc->server, |
| "init server: %s", sc->server->server_hostname); |
| |
| if (sc->client_auth != TLS_CLIENT_AUTH_NONE && !sc->client_ca) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, sc->server, APLOGNO(10325) |
| "TLSClientAuthentication is enabled for %s, but no client CA file is set. " |
| "Use 'TLSClientCA <file>' to specify the trust anchors.", |
| sc->server->server_hostname); |
| rv = APR_EINVAL; goto cleanup; |
| } |
| |
| cert_specs = complete_cert_specs(ptemp, sc); |
| sc->certified_keys = apr_array_make(p, 3, sizeof(rustls_certified_key *)); |
| rv = load_certified_keys(sc->certified_keys, sc->server, cert_specs, gc->cert_reg); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| rv = get_server_ciphersuites(&sc->ciphersuites, p, sc); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, rv, sc->server, |
| "init server: %s with %d certificates loaded", |
| sc->server->server_hostname, sc->certified_keys->nelts); |
| cleanup: |
| return rv; |
| } |
| |
| static apr_status_t get_proxy_ciphers(const apr_array_header_t **pciphersuites, |
| apr_pool_t *pool, tls_conf_proxy_t *pc) |
| { |
| const apr_array_header_t *ciphers, *suites = NULL; |
| apr_status_t rv = APR_SUCCESS; |
| |
| rv = calc_ciphers(pool, pc->defined_in, pc->global, |
| "", pc->proxy_pref_ciphers, pc->proxy_supp_ciphers, &ciphers); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| if (ciphers) { |
| suites = tls_proto_get_rustls_suites(pc->global->proto, ciphers, pool); |
| /* this changed the default rustls ciphers, configure it. */ |
| if (APLOGtrace2(pc->defined_in)) { |
| tls_proto_conf_t *conf = pc->global->proto; |
| ap_log_error(APLOG_MARK, APLOG_TRACE2, 0, pc->defined_in, |
| "tls proxy ciphers configured[%s]: %s", |
| pc->defined_in->server_hostname, |
| tls_proto_get_cipher_names(conf, ciphers, pool)); |
| } |
| } |
| |
| cleanup: |
| *pciphersuites = (APR_SUCCESS == rv)? suites : NULL; |
| return rv; |
| } |
| |
| static apr_status_t proxy_conf_setup( |
| apr_pool_t *p, apr_pool_t *ptemp, tls_conf_proxy_t *pc, tls_conf_global_t *gc) |
| { |
| apr_status_t rv = APR_SUCCESS; |
| |
| (void)p; (void)ptemp; |
| ap_assert(pc->defined_in); |
| pc->global = gc; |
| |
| if (pc->proxy_ca && strcasecmp(pc->proxy_ca, "default")) { |
| ap_log_error(APLOG_MARK, APLOG_TRACE2, rv, pc->defined_in, |
| "proxy: will use roots in %s from %s", |
| pc->defined_in->server_hostname, pc->proxy_ca); |
| } |
| else { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, rv, pc->defined_in, |
| "proxy: there is no TLSProxyCA configured in %s which means " |
| "the certificates of remote servers contacted from here will not be trusted.", |
| pc->defined_in->server_hostname); |
| } |
| |
| if (pc->proxy_protocol_min > 0) { |
| apr_array_header_t *tls_versions; |
| |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, rv, pc->defined_in, |
| "init server: set proxy protocol min version %04x", pc->proxy_protocol_min); |
| tls_versions = tls_proto_create_versions_plus( |
| gc->proto, (apr_uint16_t)pc->proxy_protocol_min, ptemp); |
| if (tls_versions->nelts > 0) { |
| if (pc->proxy_protocol_min != APR_ARRAY_IDX(tls_versions, 0, apr_uint16_t)) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, pc->defined_in, APLOGNO(10326) |
| "Init: the minimum proxy protocol version configured for %s (%04x) " |
| "is not supported and version %04x was selected instead.", |
| pc->defined_in->server_hostname, pc->proxy_protocol_min, |
| APR_ARRAY_IDX(tls_versions, 0, apr_uint16_t)); |
| } |
| } |
| else { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, pc->defined_in, APLOGNO(10327) |
| "Unable to configure the proxy protocol version for %s: " |
| "neither the configured minimum version (%04x), nor any higher one is " |
| "available.", pc->defined_in->server_hostname, pc->proxy_protocol_min); |
| rv = APR_ENOTIMPL; goto cleanup; |
| } |
| } |
| |
| #if TLS_MACHINE_CERTS |
| rv = load_certified_keys(pc->machine_certified_keys, pc->defined_in, |
| pc->machine_cert_specs, gc->cert_reg); |
| if (APR_SUCCESS != rv) goto cleanup; |
| #endif |
| |
| cleanup: |
| return rv; |
| } |
| |
| static const rustls_certified_key *extract_client_hello_values( |
| void* userdata, const rustls_client_hello *hello) |
| { |
| conn_rec *c = userdata; |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| size_t i, len; |
| unsigned short n; |
| |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, "extract client hello values"); |
| if (!cc) goto cleanup; |
| cc->client_hello_seen = 1; |
| if (hello->sni_name.len > 0) { |
| cc->sni_hostname = apr_pstrndup(c->pool, hello->sni_name.data, hello->sni_name.len); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "sni detected: %s", cc->sni_hostname); |
| } |
| else { |
| cc->sni_hostname = NULL; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "no sni from client"); |
| } |
| if (APLOGctrace4(c) && hello->signature_schemes.len > 0) { |
| for (i = 0; i < hello->signature_schemes.len; ++i) { |
| n = hello->signature_schemes.data[i]; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE4, 0, c, |
| "client supports signature scheme: %x", (int)n); |
| } |
| } |
| if ((len = rustls_slice_slice_bytes_len(hello->alpn)) > 0) { |
| apr_array_header_t *alpn = apr_array_make(c->pool, 5, sizeof(const char*)); |
| const char *protocol; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "ALPN: client proposes %d protocols", (int)len); |
| for (i = 0; i < len; ++i) { |
| rustls_slice_bytes rs = rustls_slice_slice_bytes_get(hello->alpn, i); |
| protocol = apr_pstrndup(c->pool, (const char*)rs.data, rs.len); |
| APR_ARRAY_PUSH(alpn, const char*) = protocol; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, |
| "ALPN: client proposes %d: `%s`", (int)i, protocol); |
| } |
| cc->alpn = alpn; |
| } |
| else { |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, "ALPN: no alpn proposed by client"); |
| } |
| cleanup: |
| return NULL; |
| } |
| |
| static apr_status_t setup_hello_config(apr_pool_t *p, server_rec *base_server, tls_conf_global_t *gc) |
| { |
| rustls_server_config_builder *builder; |
| rustls_result rr = RUSTLS_RESULT_OK; |
| apr_status_t rv = APR_SUCCESS; |
| |
| builder = rustls_server_config_builder_new(); |
| if (!builder) { |
| rr = RUSTLS_RESULT_PANIC; goto cleanup; |
| } |
| rustls_server_config_builder_set_hello_callback(builder, extract_client_hello_values); |
| gc->rustls_hello_config = rustls_server_config_builder_build(builder); |
| if (!gc->rustls_hello_config) { |
| rr = RUSTLS_RESULT_PANIC; goto cleanup; |
| } |
| |
| cleanup: |
| if (RUSTLS_RESULT_OK != rr) { |
| const char *err_descr = NULL; |
| rv = tls_util_rustls_error(p, rr, &err_descr); |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, base_server, APLOGNO(10328) |
| "Failed to init generic hello config: [%d] %s", (int)rr, err_descr); |
| goto cleanup; |
| } |
| return rv; |
| } |
| |
| static apr_status_t init_incoming(apr_pool_t *p, apr_pool_t *ptemp, server_rec *base_server) |
| { |
| tls_conf_server_t *sc = tls_conf_server_get(base_server); |
| tls_conf_global_t *gc = sc->global; |
| server_rec *s; |
| apr_status_t rv = APR_ENOMEM; |
| |
| ap_log_error(APLOG_MARK, APLOG_TRACE2, 0, base_server, "tls_core_init incoming"); |
| apr_pool_cleanup_register(p, base_server, tls_core_free, |
| apr_pool_cleanup_null); |
| |
| rv = tls_proto_post_config(p, ptemp, base_server); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| for (s = base_server; s; s = s->next) { |
| sc = tls_conf_server_get(s); |
| assert(sc); |
| ap_assert(sc->global == gc); |
| |
| /* If 'TLSEngine' has been configured, use those addresses to |
| * decide if we are enabled on this server. */ |
| sc->base_server = (s == base_server); |
| sc->enabled = we_listen_on(gc, s, sc)? TLS_FLAG_TRUE : TLS_FLAG_FALSE; |
| } |
| |
| rv = tls_cache_post_config(p, ptemp, base_server); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| rv = setup_hello_config(p, base_server, gc); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| /* Setup server configs and collect all certificates we use. */ |
| gc->cert_reg = tls_cert_reg_make(p); |
| gc->stores = tls_cert_root_stores_make(p); |
| gc->verifiers = tls_cert_verifiers_make(p, gc->stores); |
| for (s = base_server; s; s = s->next) { |
| sc = tls_conf_server_get(s); |
| rv = tls_conf_server_apply_defaults(sc, p); |
| if (APR_SUCCESS != rv) goto cleanup; |
| if (sc->enabled != TLS_FLAG_TRUE) continue; |
| rv = server_conf_setup(p, ptemp, sc, gc); |
| if (APR_SUCCESS != rv) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, "server setup failed: %s", |
| s->server_hostname); |
| goto cleanup; |
| } |
| } |
| |
| cleanup: |
| if (APR_SUCCESS != rv) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, base_server, "error during post_config"); |
| } |
| return rv; |
| } |
| |
| static apr_status_t init_outgoing(apr_pool_t *p, apr_pool_t *ptemp, server_rec *base_server) |
| { |
| tls_conf_server_t *sc = tls_conf_server_get(base_server); |
| tls_conf_global_t *gc = sc->global; |
| tls_conf_dir_t *dc; |
| tls_conf_proxy_t *pc; |
| server_rec *s; |
| apr_status_t rv = APR_SUCCESS; |
| int i; |
| |
| (void)p; (void)ptemp; |
| (void)gc; |
| ap_log_error(APLOG_MARK, APLOG_TRACE2, 0, base_server, "tls_core_init outgoing"); |
| ap_assert(gc->mod_proxy_post_config_done); |
| /* Collect all proxy'ing default server dir configs. |
| * All <Proxy> section dir_configs should already be there - if there were any. */ |
| for (s = base_server; s; s = s->next) { |
| dc = tls_conf_dir_server_get(s); |
| rv = tls_conf_dir_apply_defaults(dc, p); |
| if (APR_SUCCESS != rv) goto cleanup; |
| if (dc->proxy_enabled != TLS_FLAG_TRUE) continue; |
| dc->proxy_config = tls_conf_proxy_make(p, dc, gc, s); |
| ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, s, "%s: adding proxy_conf to globals", |
| s->server_hostname); |
| APR_ARRAY_PUSH(gc->proxy_configs, tls_conf_proxy_t*) = dc->proxy_config; |
| } |
| /* Now gc->proxy_configs contains all configurations we need to possibly |
| * act on for outgoing connections. */ |
| for (i = 0; i < gc->proxy_configs->nelts; ++i) { |
| pc = APR_ARRAY_IDX(gc->proxy_configs, i, tls_conf_proxy_t*); |
| rv = proxy_conf_setup(p, ptemp, pc, gc); |
| if (APR_SUCCESS != rv) goto cleanup; |
| } |
| |
| cleanup: |
| return rv; |
| } |
| |
| apr_status_t tls_core_init(apr_pool_t *p, apr_pool_t *ptemp, server_rec *base_server) |
| { |
| tls_conf_server_t *sc = tls_conf_server_get(base_server); |
| tls_conf_global_t *gc = sc->global; |
| apr_status_t rv = APR_SUCCESS; |
| |
| ap_assert(gc); |
| if (TLS_CONF_ST_INIT == gc->status) { |
| rv = init_incoming(p, ptemp, base_server); |
| if (APR_SUCCESS != rv) goto cleanup; |
| gc->status = TLS_CONF_ST_INCOMING_DONE; |
| } |
| if (TLS_CONF_ST_INCOMING_DONE == gc->status) { |
| if (!gc->mod_proxy_post_config_done) goto cleanup; |
| |
| rv = init_outgoing(p, ptemp, base_server); |
| if (APR_SUCCESS != rv) goto cleanup; |
| gc->status = TLS_CONF_ST_OUTGOING_DONE; |
| } |
| if (TLS_CONF_ST_OUTGOING_DONE == gc->status) { |
| /* register all loaded certificates for OCSP stapling */ |
| rv = tls_ocsp_prime_certs(gc, p, base_server); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| if (gc->verifiers) tls_cert_verifiers_clear(gc->verifiers); |
| if (gc->stores) tls_cert_root_stores_clear(gc->stores); |
| gc->status = TLS_CONF_ST_DONE; |
| } |
| cleanup: |
| return rv; |
| } |
| |
| static apr_status_t tls_core_conn_free(void *data) |
| { |
| tls_conf_conn_t *cc = data; |
| |
| /* free all rustls things we are owning. */ |
| if (cc->rustls_connection) { |
| rustls_connection_free(cc->rustls_connection); |
| cc->rustls_connection = NULL; |
| } |
| if (cc->rustls_server_config) { |
| rustls_server_config_free(cc->rustls_server_config); |
| cc->rustls_server_config = NULL; |
| } |
| if (cc->rustls_client_config) { |
| rustls_client_config_free(cc->rustls_client_config); |
| cc->rustls_client_config = NULL; |
| } |
| if (cc->key_cloned && cc->key) { |
| rustls_certified_key_free(cc->key); |
| cc->key = NULL; |
| } |
| if (cc->local_keys) { |
| const rustls_certified_key *key; |
| int i; |
| |
| for (i = 0; i < cc->local_keys->nelts; ++i) { |
| key = APR_ARRAY_IDX(cc->local_keys, i, const rustls_certified_key*); |
| rustls_certified_key_free(key); |
| } |
| apr_array_clear(cc->local_keys); |
| } |
| return APR_SUCCESS; |
| } |
| |
| static tls_conf_conn_t *cc_get_or_make(conn_rec *c) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| if (!cc) { |
| cc = apr_pcalloc(c->pool, sizeof(*cc)); |
| cc->server = c->base_server; |
| cc->state = TLS_CONN_ST_INIT; |
| tls_conf_conn_set(c, cc); |
| apr_pool_cleanup_register(c->pool, cc, tls_core_conn_free, |
| apr_pool_cleanup_null); |
| } |
| return cc; |
| } |
| |
| void tls_core_conn_disable(conn_rec *c) |
| { |
| tls_conf_conn_t *cc; |
| cc = cc_get_or_make(c); |
| if (cc->state == TLS_CONN_ST_INIT) { |
| cc->state = TLS_CONN_ST_DISABLED; |
| } |
| } |
| |
| void tls_core_conn_bind(conn_rec *c, ap_conf_vector_t *dir_conf) |
| { |
| tls_conf_conn_t *cc = cc_get_or_make(c); |
| cc->dc = dir_conf? ap_get_module_config(dir_conf, &tls_module) : NULL; |
| } |
| |
| |
| static apr_status_t init_outgoing_connection(conn_rec *c) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| tls_conf_proxy_t *pc; |
| const apr_array_header_t *ciphersuites = NULL; |
| apr_array_header_t *tls_versions = NULL; |
| rustls_client_config_builder *builder = NULL; |
| rustls_root_cert_store *ca_store = NULL; |
| const char *hostname = NULL, *alpn_note = NULL; |
| rustls_result rr = RUSTLS_RESULT_OK; |
| apr_status_t rv = APR_SUCCESS; |
| |
| ap_assert(cc->outgoing); |
| ap_assert(cc->dc); |
| pc = cc->dc->proxy_config; |
| ap_assert(pc); |
| |
| hostname = apr_table_get(c->notes, "proxy-request-hostname"); |
| alpn_note = apr_table_get(c->notes, "proxy-request-alpn-protos"); |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, c->base_server, |
| "setup_outgoing: to %s [ALPN: %s] from configuration in %s" |
| " using CA %s", hostname, alpn_note, pc->defined_in->server_hostname, pc->proxy_ca); |
| |
| rv = get_proxy_ciphers(&ciphersuites, c->pool, pc); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| if (pc->proxy_protocol_min > 0) { |
| tls_versions = tls_proto_create_versions_plus( |
| pc->global->proto, (apr_uint16_t)pc->proxy_protocol_min, c->pool); |
| } |
| |
| if (ciphersuites && ciphersuites->nelts > 0 |
| && tls_versions && tls_versions->nelts >= 0) { |
| rr = rustls_client_config_builder_new_custom( |
| (const struct rustls_supported_ciphersuite *const *)ciphersuites->elts, |
| (size_t)ciphersuites->nelts, |
| (const uint16_t *)tls_versions->elts, (size_t)tls_versions->nelts, |
| &builder); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| } |
| else { |
| builder = rustls_client_config_builder_new(); |
| if (NULL == builder) { |
| rv = APR_ENOMEM; |
| goto cleanup; |
| } |
| } |
| |
| if (pc->proxy_ca && strcasecmp(pc->proxy_ca, "default")) { |
| rv = tls_cert_root_stores_get(pc->global->stores, pc->proxy_ca, &ca_store); |
| if (APR_SUCCESS != rv) goto cleanup; |
| rustls_client_config_builder_use_roots(builder, ca_store); |
| } |
| |
| #if TLS_MACHINE_CERTS |
| if (pc->machine_certified_keys->nelts > 0) { |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, c->base_server, |
| "setup_outgoing: adding %d client certificate", (int)pc->machine_certified_keys->nelts); |
| rr = rustls_client_config_builder_set_certified_key( |
| builder, (const rustls_certified_key**)pc->machine_certified_keys->elts, |
| (size_t)pc->machine_certified_keys->nelts); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| } |
| #endif |
| |
| if (hostname) { |
| rustls_client_config_builder_set_enable_sni(builder, true); |
| } |
| else { |
| hostname = "unknown.proxy.local"; |
| rustls_client_config_builder_set_enable_sni(builder, false); |
| } |
| |
| if (alpn_note) { |
| apr_array_header_t *alpn_proposed = NULL; |
| char *p, *last; |
| apr_size_t len; |
| |
| alpn_proposed = apr_array_make(c->pool, 3, sizeof(const char*)); |
| p = apr_pstrdup(c->pool, alpn_note); |
| while ((p = apr_strtok(p, ", ", &last))) { |
| len = (apr_size_t)(last - p - (*last? 1 : 0)); |
| if (len > 255) { |
| ap_log_cerror(APLOG_MARK, APLOG_ERR, 0, c, APLOGNO(10329) |
| "ALPN proxy protocol identifier too long: %s", p); |
| rv = APR_EGENERAL; |
| goto cleanup; |
| } |
| APR_ARRAY_PUSH(alpn_proposed, const char*) = apr_pstrndup(c->pool, p, len); |
| p = NULL; |
| } |
| if (alpn_proposed->nelts > 0) { |
| apr_array_header_t *rustls_protocols; |
| const char* proto; |
| rustls_slice_bytes bytes; |
| int i; |
| |
| rustls_protocols = apr_array_make(c->pool, alpn_proposed->nelts, sizeof(rustls_slice_bytes)); |
| for (i = 0; i < alpn_proposed->nelts; ++i) { |
| proto = APR_ARRAY_IDX(alpn_proposed, i, const char*); |
| bytes.data = (const unsigned char*)proto; |
| bytes.len = strlen(proto); |
| APR_ARRAY_PUSH(rustls_protocols, rustls_slice_bytes) = bytes; |
| } |
| |
| rr = rustls_client_config_builder_set_alpn_protocols(builder, |
| (rustls_slice_bytes*)rustls_protocols->elts, (size_t)rustls_protocols->nelts); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| |
| ap_log_error(APLOG_MARK, APLOG_TRACE2, 0, c->base_server, |
| "setup_outgoing: to %s, added %d ALPN protocols from %s", |
| hostname, rustls_protocols->nelts, alpn_note); |
| } |
| } |
| |
| cc->rustls_client_config = rustls_client_config_builder_build(builder); |
| builder = NULL; |
| |
| rr = rustls_client_connection_new(cc->rustls_client_config, hostname, &cc->rustls_connection); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| rustls_connection_set_userdata(cc->rustls_connection, c); |
| |
| cleanup: |
| if (builder != NULL) rustls_client_config_builder_free(builder); |
| if (RUSTLS_RESULT_OK != rr) { |
| const char *err_descr = NULL; |
| rv = tls_util_rustls_error(c->pool, rr, &err_descr); |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cc->server, APLOGNO(10330) |
| "Failed to init pre_session for outgoing %s to %s: [%d] %s", |
| cc->server->server_hostname, hostname, (int)rr, err_descr); |
| c->aborted = 1; |
| cc->state = TLS_CONN_ST_DISABLED; |
| goto cleanup; |
| } |
| return rv; |
| } |
| |
| int tls_core_pre_conn_init(conn_rec *c) |
| { |
| tls_conf_server_t *sc = tls_conf_server_get(c->base_server); |
| tls_conf_conn_t *cc; |
| |
| cc = cc_get_or_make(c); |
| if (cc->state == TLS_CONN_ST_INIT) { |
| /* Need to decide if we TLS this connection or not */ |
| int enabled = |
| #if AP_MODULE_MAGIC_AT_LEAST(20120211, 109) |
| !c->outgoing && |
| #endif |
| sc->enabled == TLS_FLAG_TRUE; |
| cc->state = enabled? TLS_CONN_ST_CLIENT_HELLO : TLS_CONN_ST_DISABLED; |
| cc->client_auth = sc->client_auth; |
| ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, c->base_server, |
| "tls_core_conn_init: %s for tls: %s", |
| enabled? "enabled" : "disabled", c->base_server->server_hostname); |
| } |
| else if (cc->state == TLS_CONN_ST_DISABLED) { |
| ap_log_error(APLOG_MARK, APLOG_TRACE4, 0, c->base_server, |
| "tls_core_conn_init, not our connection: %s", |
| c->base_server->server_hostname); |
| goto cleanup; |
| } |
| |
| cleanup: |
| return TLS_CONN_ST_IS_ENABLED(cc)? OK : DECLINED; |
| } |
| |
| apr_status_t tls_core_conn_init(conn_rec *c) |
| { |
| tls_conf_server_t *sc = tls_conf_server_get(c->base_server); |
| tls_conf_conn_t *cc; |
| rustls_result rr = RUSTLS_RESULT_OK; |
| apr_status_t rv = APR_SUCCESS; |
| |
| cc = tls_conf_conn_get(c); |
| if (cc && TLS_CONN_ST_IS_ENABLED(cc) && !cc->rustls_connection) { |
| if (cc->outgoing) { |
| rv = init_outgoing_connection(c); |
| if (APR_SUCCESS != rv) goto cleanup; |
| } |
| else { |
| /* Use a generic rustls_connection with its defaults, which we feed |
| * the first TLS bytes from the client. Its Hello message will trigger |
| * our callback where we can inspect the (possibly) supplied SNI and |
| * select another server. |
| */ |
| rr = rustls_server_connection_new(sc->global->rustls_hello_config, &cc->rustls_connection); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| /* we might refuse requests on this connection, e.g. ACME challenge */ |
| cc->service_unavailable = sc->service_unavailable; |
| } |
| rustls_connection_set_userdata(cc->rustls_connection, c); |
| } |
| |
| cleanup: |
| if (RUSTLS_RESULT_OK != rr) { |
| const char *err_descr = NULL; |
| rv = tls_util_rustls_error(c->pool, rr, &err_descr); |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, sc->server, APLOGNO(10331) |
| "Failed to init TLS connection for server %s: [%d] %s", |
| sc->server->server_hostname, (int)rr, err_descr); |
| c->aborted = 1; |
| cc->state = TLS_CONN_ST_DISABLED; |
| goto cleanup; |
| } |
| return rv; |
| } |
| |
| static int find_vhost(void *sni_hostname, conn_rec *c, server_rec *s) |
| { |
| if (tls_util_name_matches_server(sni_hostname, s)) { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| cc->server = s; |
| return 1; |
| } |
| return 0; |
| } |
| |
| static apr_status_t select_application_protocol( |
| conn_rec *c, server_rec *s, rustls_server_config_builder *builder) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| const char *proposed; |
| rustls_result rr = RUSTLS_RESULT_OK; |
| apr_status_t rv = APR_SUCCESS; |
| |
| /* The server always has a protocol it uses, normally "http/1.1". |
| * if the client, via ALPN, proposes protocols, they are in |
| * order of preference. |
| * We propose those to modules registered in the server and |
| * get the protocol back that someone is willing to run on this |
| * connection. |
| * If this is different from what the connection already does, |
| * we tell the server (and all protocol modules) to switch. |
| * If successful, we announce that protocol back to the client as |
| * our only ALPN protocol and then do the 'real' handshake. |
| */ |
| cc->application_protocol = ap_get_protocol(c); |
| if (cc->alpn && cc->alpn->nelts > 0) { |
| rustls_slice_bytes rsb; |
| |
| proposed = ap_select_protocol(c, NULL, s, cc->alpn); |
| if (!proposed) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, rv, c, |
| "ALPN: no protocol selected in server"); |
| goto cleanup; |
| } |
| |
| if (strcmp(proposed, cc->application_protocol)) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, rv, c, |
| "ALPN: switching protocol from `%s` to `%s`", cc->application_protocol, proposed); |
| rv = ap_switch_protocol(c, NULL, cc->server, proposed); |
| if (APR_SUCCESS != rv) goto cleanup; |
| } |
| |
| rsb.data = (const unsigned char*)proposed; |
| rsb.len = strlen(proposed); |
| rr = rustls_server_config_builder_set_alpn_protocols(builder, &rsb, 1); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| |
| cc->application_protocol = proposed; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, rv, c, |
| "ALPN: using connection protocol `%s`", cc->application_protocol); |
| |
| /* protocol was switched, this could be a challenge protocol |
| * such as "acme-tls/1". Give handlers the opportunity to |
| * override the certificate for this connection. */ |
| if (strcmp("h2", proposed) && strcmp("http/1.1", proposed)) { |
| const char *cert_pem = NULL, *key_pem = NULL; |
| if (ap_ssl_answer_challenge(c, cc->sni_hostname, &cert_pem, &key_pem)) { |
| /* With ACME we can have challenge connections to a unknown domains |
| * that need to be answered with a special certificate and will |
| * otherwise not answer any requests. See RFC 8555 */ |
| rv = use_local_key(c, cert_pem, key_pem); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| cc->service_unavailable = 1; |
| cc->client_auth = TLS_CLIENT_AUTH_NONE; |
| } |
| } |
| } |
| |
| cleanup: |
| if (rr != RUSTLS_RESULT_OK) { |
| const char *err_descr = NULL; |
| rv = tls_util_rustls_error(c->pool, rr, &err_descr); |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10332) |
| "Failed to init session for server %s: [%d] %s", |
| s->server_hostname, (int)rr, err_descr); |
| c->aborted = 1; |
| goto cleanup; |
| } |
| return rv; |
| } |
| |
| static apr_status_t build_server_connection(rustls_connection **pconnection, |
| const rustls_server_config **pconfig, |
| conn_rec *c) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| tls_conf_server_t *sc; |
| const apr_array_header_t *tls_versions = NULL; |
| rustls_server_config_builder *builder = NULL; |
| const rustls_server_config *config = NULL; |
| rustls_connection *rconnection = NULL; |
| rustls_result rr = RUSTLS_RESULT_OK; |
| apr_status_t rv = APR_SUCCESS; |
| |
| sc = tls_conf_server_get(cc->server); |
| |
| if (sc->tls_protocol_min > 0) { |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, rv, sc->server, |
| "init server: set protocol min version %04x", sc->tls_protocol_min); |
| tls_versions = tls_proto_create_versions_plus( |
| sc->global->proto, (apr_uint16_t)sc->tls_protocol_min, c->pool); |
| if (tls_versions->nelts > 0) { |
| if (sc->tls_protocol_min != APR_ARRAY_IDX(tls_versions, 0, apr_uint16_t)) { |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, sc->server, APLOGNO(10333) |
| "Init: the minimum protocol version configured for %s (%04x) " |
| "is not supported and version %04x was selected instead.", |
| sc->server->server_hostname, sc->tls_protocol_min, |
| APR_ARRAY_IDX(tls_versions, 0, apr_uint16_t)); |
| } |
| } |
| else { |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, sc->server, APLOGNO(10334) |
| "Unable to configure the protocol version for %s: " |
| "neither the configured minimum version (%04x), nor any higher one is " |
| "available.", sc->server->server_hostname, sc->tls_protocol_min); |
| rv = APR_ENOTIMPL; goto cleanup; |
| } |
| } |
| else if (sc->ciphersuites && sc->ciphersuites->nelts > 0) { |
| /* FIXME: rustls-ffi current has not way to make a builder with ALL_PROTOCOL_VERSIONS */ |
| tls_versions = tls_proto_create_versions_plus(sc->global->proto, 0, c->pool); |
| } |
| |
| if (sc->ciphersuites && sc->ciphersuites->nelts > 0 |
| && tls_versions && tls_versions->nelts >= 0) { |
| rr = rustls_server_config_builder_new_custom( |
| (const struct rustls_supported_ciphersuite *const *)sc->ciphersuites->elts, |
| (size_t)sc->ciphersuites->nelts, |
| (const uint16_t *)tls_versions->elts, (size_t)tls_versions->nelts, |
| &builder); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| } |
| else { |
| builder = rustls_server_config_builder_new(); |
| if (NULL == builder) { |
| rv = APR_ENOMEM; |
| goto cleanup; |
| } |
| } |
| |
| /* decide on the application protocol, this may change other |
| * settings like client_auth. */ |
| rv = select_application_protocol(c, cc->server, builder); |
| |
| if (cc->client_auth != TLS_CLIENT_AUTH_NONE) { |
| ap_assert(sc->client_ca); /* checked in server_setup */ |
| if (cc->client_auth == TLS_CLIENT_AUTH_REQUIRED) { |
| const rustls_client_cert_verifier *verifier; |
| rv = tls_cert_client_verifiers_get(sc->global->verifiers, sc->client_ca, &verifier); |
| if (APR_SUCCESS != rv) goto cleanup; |
| rustls_server_config_builder_set_client_verifier(builder, verifier); |
| } |
| else { |
| const rustls_client_cert_verifier_optional *verifier; |
| rv = tls_cert_client_verifiers_get_optional(sc->global->verifiers, sc->client_ca, &verifier); |
| if (APR_SUCCESS != rv) goto cleanup; |
| rustls_server_config_builder_set_client_verifier_optional(builder, verifier); |
| } |
| } |
| |
| rustls_server_config_builder_set_hello_callback(builder, select_certified_key); |
| |
| rr = rustls_server_config_builder_set_ignore_client_order( |
| builder, sc->honor_client_order == TLS_FLAG_FALSE); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| |
| rv = tls_cache_init_server(builder, sc->server); |
| if (APR_SUCCESS != rv) goto cleanup; |
| |
| config = rustls_server_config_builder_build(builder); |
| builder = NULL; |
| if (!config) { |
| rv = APR_ENOMEM; goto cleanup; |
| } |
| |
| rr = rustls_server_connection_new(config, &rconnection); |
| if (RUSTLS_RESULT_OK != rr) goto cleanup; |
| rustls_connection_set_userdata(rconnection, c); |
| |
| cleanup: |
| if (rr != RUSTLS_RESULT_OK) { |
| const char *err_descr = NULL; |
| rv = tls_util_rustls_error(c->pool, rr, &err_descr); |
| ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, sc->server, APLOGNO(10335) |
| "Failed to init session for server %s: [%d] %s", |
| sc->server->server_hostname, (int)rr, err_descr); |
| } |
| if (APR_SUCCESS == rv) { |
| *pconfig = config; |
| *pconnection = rconnection; |
| ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, sc->server, |
| "tls_core_conn_server_init done: %s", |
| sc->server->server_hostname); |
| } |
| else { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, sc->server, APLOGNO(10336) |
| "Failed to init session for server %s", |
| sc->server->server_hostname); |
| c->aborted = 1; |
| if (config) rustls_server_config_free(config); |
| if (builder) rustls_server_config_builder_free(builder); |
| } |
| return rv; |
| } |
| |
| apr_status_t tls_core_conn_seen_client_hello(conn_rec *c) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| tls_conf_server_t *sc; |
| apr_status_t rv = APR_SUCCESS; |
| int sni_match = 0; |
| |
| /* The initial rustls generic session has been fed the client hello and |
| * we have extracted SNI and ALPN values (so present). |
| * Time to select the actual server_rec and application protocol that |
| * will be used on this connection. */ |
| ap_assert(cc); |
| sc = tls_conf_server_get(cc->server); |
| if (!cc->client_hello_seen) goto cleanup; |
| |
| if (cc->sni_hostname) { |
| if (ap_vhost_iterate_given_conn(c, find_vhost, (void*)cc->sni_hostname)) { |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(10337) |
| "vhost_init: virtual host found for SNI '%s'", cc->sni_hostname); |
| sni_match = 1; |
| } |
| else if (tls_util_name_matches_server(cc->sni_hostname, ap_server_conf)) { |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(10338) |
| "vhost_init: virtual host NOT found, but base server[%s] matches SNI '%s'", |
| ap_server_conf->server_hostname, cc->sni_hostname); |
| cc->server = ap_server_conf; |
| sni_match = 1; |
| } |
| else if (sc->strict_sni == TLS_FLAG_FALSE) { |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(10339) |
| "vhost_init: no virtual host found, relaxed SNI checking enabled, SNI '%s'", |
| cc->sni_hostname); |
| } |
| else { |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, rv, c, APLOGNO(10340) |
| "vhost_init: no virtual host, nor base server[%s] matches SNI '%s'", |
| c->base_server->server_hostname, cc->sni_hostname); |
| cc->server = sc->global->ap_server; |
| rv = APR_NOTFOUND; goto cleanup; |
| } |
| } |
| else { |
| ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(10341) |
| "vhost_init: no SNI hostname provided by client"); |
| } |
| |
| /* reinit, we might have a new server selected */ |
| sc = tls_conf_server_get(cc->server); |
| /* on relaxed SNI matches, we do not enforce the 503 of fallback |
| * certificates. */ |
| if (!cc->service_unavailable) { |
| cc->service_unavailable = sni_match? sc->service_unavailable : 0; |
| } |
| |
| /* if found or not, cc->server will be the server we use now to do |
| * the real handshake and, if successful, the traffic after that. |
| * Free the current session and create the real one for the |
| * selected server. */ |
| if (cc->rustls_server_config) { |
| rustls_server_config_free(cc->rustls_server_config); |
| cc->rustls_server_config = NULL; |
| } |
| rustls_connection_free(cc->rustls_connection); |
| cc->rustls_connection = NULL; |
| |
| rv = build_server_connection(&cc->rustls_connection, &cc->rustls_server_config, c); |
| |
| cleanup: |
| return rv; |
| } |
| |
| apr_status_t tls_core_conn_post_handshake(conn_rec *c) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| tls_conf_server_t *sc = tls_conf_server_get(cc->server); |
| const rustls_supported_ciphersuite *rsuite; |
| const rustls_certificate *cert; |
| apr_status_t rv = APR_SUCCESS; |
| |
| if (rustls_connection_is_handshaking(cc->rustls_connection)) { |
| rv = APR_EGENERAL; |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cc->server, APLOGNO(10342) |
| "post handshake, but rustls claims to still be handshaking: %s", |
| cc->server->server_hostname); |
| goto cleanup; |
| } |
| |
| cc->tls_protocol_id = rustls_connection_get_protocol_version(cc->rustls_connection); |
| cc->tls_protocol_name = tls_proto_get_version_name(sc->global->proto, |
| cc->tls_protocol_id, c->pool); |
| rsuite = rustls_connection_get_negotiated_ciphersuite(cc->rustls_connection); |
| if (!rsuite) { |
| rv = APR_EGENERAL; |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, cc->server, APLOGNO(10343) |
| "post handshake, but rustls does not report negotiated cipher suite: %s", |
| cc->server->server_hostname); |
| goto cleanup; |
| } |
| cc->tls_cipher_id = rustls_supported_ciphersuite_get_suite(rsuite); |
| cc->tls_cipher_name = tls_proto_get_cipher_name(sc->global->proto, |
| cc->tls_cipher_id, c->pool); |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "post_handshake %s: %s [%s]", |
| cc->server->server_hostname, cc->tls_protocol_name, cc->tls_cipher_name); |
| |
| cert = rustls_connection_get_peer_certificate(cc->rustls_connection, 0); |
| if (cert) { |
| size_t i = 0; |
| |
| cc->peer_certs = apr_array_make(c->pool, 5, sizeof(const rustls_certificate*)); |
| while (cert) { |
| APR_ARRAY_PUSH(cc->peer_certs, const rustls_certificate*) = cert; |
| cert = rustls_connection_get_peer_certificate(cc->rustls_connection, ++i); |
| } |
| } |
| if (!cc->peer_certs && sc->client_auth == TLS_CLIENT_AUTH_REQUIRED) { |
| ap_log_cerror(APLOG_MARK, APLOG_INFO, 0, c, APLOGNO(10344) |
| "A client certificate is required, but no acceptable certificate was presented."); |
| rv = APR_ECONNABORTED; |
| } |
| |
| rv = tls_var_handshake_done(c); |
| cleanup: |
| return rv; |
| } |
| |
| /** |
| * Return != 0, if a connection also serve requests for server <other>. |
| */ |
| static int tls_conn_compatible_for(tls_conf_conn_t *cc, server_rec *other) |
| { |
| tls_conf_server_t *oc, *sc; |
| const rustls_certified_key *sk, *ok; |
| int i; |
| |
| /* - differences in certificates are the responsibility of the client. |
| * if it thinks the SNI server works for r->server, we are fine with that. |
| * - if there are differences in requirements to client certificates, we |
| * need to deny the request. |
| */ |
| if (!cc->server || !other) return 0; |
| if (cc->server == other) return 1; |
| oc = tls_conf_server_get(other); |
| if (!oc) return 0; |
| sc = tls_conf_server_get(cc->server); |
| if (!sc) return 0; |
| |
| /* same certified keys used? */ |
| if (sc->certified_keys->nelts != oc->certified_keys->nelts) return 0; |
| for (i = 0; i < sc->certified_keys->nelts; ++i) { |
| sk = APR_ARRAY_IDX(sc->certified_keys, i, const rustls_certified_key*); |
| ok = APR_ARRAY_IDX(oc->certified_keys, i, const rustls_certified_key*); |
| if (sk != ok) return 0; |
| } |
| |
| /* If the connection TLS version is below other other min one, no */ |
| if (oc->tls_protocol_min > 0 && cc->tls_protocol_id < oc->tls_protocol_min) return 0; |
| /* If the connection TLS cipher is listed as suppressed by other, no */ |
| if (oc->tls_supp_ciphers && tls_util_array_uint16_contains( |
| oc->tls_supp_ciphers, cc->tls_cipher_id)) return 0; |
| return 1; |
| } |
| |
| int tls_core_request_check(request_rec *r) |
| { |
| conn_rec *c = r->connection; |
| tls_conf_conn_t *cc = tls_conf_conn_get(c->master? c->master : c); |
| int rv = DECLINED; /* do not object to the request */ |
| |
| /* If we are not enabled on this connection, leave. We are not renegotiating. |
| * Otherwise: |
| * - service is unavailable when we have only a fallback certificate or |
| * when a challenge protocol is active (ACME tls-alpn-01 for example). |
| * - with vhosts configured and no SNI from the client, deny access. |
| * - are servers compatible for connection sharing? |
| */ |
| if (!TLS_CONN_ST_IS_ENABLED(cc)) goto cleanup; |
| |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r, |
| "tls_core_request_check[%s, %d]: %s", r->hostname, |
| cc? cc->service_unavailable : 2, r->the_request); |
| if (cc->service_unavailable) { |
| rv = HTTP_SERVICE_UNAVAILABLE; goto cleanup; |
| } |
| if (!cc->sni_hostname && r->connection->vhost_lookup_data) { |
| rv = HTTP_FORBIDDEN; goto cleanup; |
| } |
| if (!tls_conn_compatible_for(cc, r->server)) { |
| rv = HTTP_MISDIRECTED_REQUEST; |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(10345) |
| "Connection host %s, selected via SNI, and request host %s" |
| " have incompatible TLS configurations.", |
| cc->server->server_hostname, r->hostname); |
| goto cleanup; |
| } |
| cleanup: |
| return rv; |
| } |
| |
| apr_status_t tls_core_error(conn_rec *c, rustls_result rr, const char **perrstr) |
| { |
| tls_conf_conn_t *cc = tls_conf_conn_get(c); |
| apr_status_t rv; |
| |
| rv = tls_util_rustls_error(c->pool, rr, perrstr); |
| if (cc) { |
| cc->last_error = rr; |
| cc->last_error_descr = *perrstr; |
| } |
| return rv; |
| } |
| |
| int tls_core_setup_outgoing(conn_rec *c) |
| { |
| tls_conf_conn_t *cc; |
| int rv = DECLINED; |
| |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, |
| "tls_core_setup_outgoing called"); |
| #if AP_MODULE_MAGIC_AT_LEAST(20120211, 109) |
| if (!c->outgoing) goto cleanup; |
| #endif |
| cc = cc_get_or_make(c); |
| if (cc->state == TLS_CONN_ST_DISABLED) { |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, |
| "tls_core_setup_outgoing: already disabled"); |
| goto cleanup; |
| } |
| if (TLS_CONN_ST_IS_ENABLED(cc)) { |
| /* we already handle it, allow repeated calls */ |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, |
| "tls_core_setup_outgoing: already enabled"); |
| rv = OK; goto cleanup; |
| } |
| cc->outgoing = 1; |
| if (!cc->dc) { |
| /* In case there is not dir_conf bound for this connection, we fallback |
| * to the defaults in the base server (we have no virtual host config to use) */ |
| cc->dc = ap_get_module_config(c->base_server->lookup_defaults, &tls_module); |
| } |
| if (cc->dc->proxy_enabled != TLS_FLAG_TRUE) { |
| cc->state = TLS_CONN_ST_DISABLED; |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, |
| "tls_core_setup_outgoing: TLSProxyEngine not configured"); |
| goto cleanup; |
| } |
| /* we handle this connection */ |
| cc->state = TLS_CONN_ST_CLIENT_HELLO; |
| rv = OK; |
| |
| cleanup: |
| ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, |
| "tls_core_setup_outgoing returns %s", rv == OK? "OK" : "DECLINED"); |
| return rv; |
| } |
