diff options
Diffstat (limited to 'modules/md/mod_md.c')
| -rw-r--r-- | modules/md/mod_md.c | 1535 |
1 files changed, 1535 insertions, 0 deletions
diff --git a/modules/md/mod_md.c b/modules/md/mod_md.c new file mode 100644 index 0000000..32dea4f --- /dev/null +++ b/modules/md/mod_md.c @@ -0,0 +1,1535 @@ +/* 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_optional.h> +#include <apr_strings.h> + +#include <mpm_common.h> +#include <httpd.h> +#include <http_core.h> +#include <http_protocol.h> +#include <http_request.h> +#include <http_ssl.h> +#include <http_log.h> +#include <http_vhost.h> +#include <ap_listen.h> + +#include "mod_status.h" + +#include "md.h" +#include "md_curl.h" +#include "md_crypt.h" +#include "md_event.h" +#include "md_http.h" +#include "md_json.h" +#include "md_store.h" +#include "md_store_fs.h" +#include "md_log.h" +#include "md_ocsp.h" +#include "md_result.h" +#include "md_reg.h" +#include "md_status.h" +#include "md_util.h" +#include "md_version.h" +#include "md_acme.h" +#include "md_acme_authz.h" + +#include "mod_md.h" +#include "mod_md_config.h" +#include "mod_md_drive.h" +#include "mod_md_ocsp.h" +#include "mod_md_os.h" +#include "mod_md_status.h" + +static void md_hooks(apr_pool_t *pool); + +AP_DECLARE_MODULE(md) = { + STANDARD20_MODULE_STUFF, + NULL, /* func to create per dir config */ + NULL, /* func to merge per dir config */ + md_config_create_svr, /* func to create per server config */ + md_config_merge_svr, /* func to merge per server config */ + md_cmds, /* command handlers */ + md_hooks, +#if defined(AP_MODULE_FLAG_NONE) + AP_MODULE_FLAG_ALWAYS_MERGE +#endif +}; + +/**************************************************************************************************/ +/* logging setup */ + +static server_rec *log_server; + +static int log_is_level(void *baton, apr_pool_t *p, md_log_level_t level) +{ + (void)baton; + (void)p; + if (log_server) { + return APLOG_IS_LEVEL(log_server, (int)level); + } + return level <= MD_LOG_INFO; +} + +#define LOG_BUF_LEN 16*1024 + +static void log_print(const char *file, int line, md_log_level_t level, + apr_status_t rv, void *baton, apr_pool_t *p, const char *fmt, va_list ap) +{ + if (log_is_level(baton, p, level)) { + char buffer[LOG_BUF_LEN]; + + memset(buffer, 0, sizeof(buffer)); + apr_vsnprintf(buffer, LOG_BUF_LEN-1, fmt, ap); + buffer[LOG_BUF_LEN-1] = '\0'; + + if (log_server) { + ap_log_error(file, line, APLOG_MODULE_INDEX, (int)level, rv, log_server, "%s", buffer); + } + else { + ap_log_perror(file, line, APLOG_MODULE_INDEX, (int)level, rv, p, "%s", buffer); + } + } +} + +/**************************************************************************************************/ +/* mod_ssl interface */ + +static void init_ssl(void) +{ + /* nop */ +} + +/**************************************************************************************************/ +/* lifecycle */ + +static apr_status_t cleanup_setups(void *dummy) +{ + (void)dummy; + log_server = NULL; + return APR_SUCCESS; +} + +static void init_setups(apr_pool_t *p, server_rec *base_server) +{ + log_server = base_server; + apr_pool_cleanup_register(p, NULL, cleanup_setups, apr_pool_cleanup_null); +} + +/**************************************************************************************************/ +/* notification handling */ + +typedef struct { + const char *reason; /* what the notification is about */ + apr_time_t min_interim; /* minimum time between notifying for this reason */ +} notify_rate; + +static notify_rate notify_rates[] = { + { "renewing", apr_time_from_sec(MD_SECS_PER_HOUR) }, /* once per hour */ + { "renewed", apr_time_from_sec(MD_SECS_PER_DAY) }, /* once per day */ + { "installed", apr_time_from_sec(MD_SECS_PER_DAY) }, /* once per day */ + { "expiring", apr_time_from_sec(MD_SECS_PER_DAY) }, /* once per day */ + { "errored", apr_time_from_sec(MD_SECS_PER_HOUR) }, /* once per hour */ + { "ocsp-renewed", apr_time_from_sec(MD_SECS_PER_DAY) }, /* once per day */ + { "ocsp-errored", apr_time_from_sec(MD_SECS_PER_HOUR) }, /* once per hour */ +}; + +static apr_status_t notify(md_job_t *job, const char *reason, + md_result_t *result, apr_pool_t *p, void *baton) +{ + md_mod_conf_t *mc = baton; + const char * const *argv; + const char *cmdline; + int exit_code; + apr_status_t rv = APR_SUCCESS; + apr_time_t min_interim = 0; + md_timeperiod_t since_last; + const char *log_msg_reason; + int i; + + log_msg_reason = apr_psprintf(p, "message-%s", reason); + for (i = 0; i < (int)(sizeof(notify_rates)/sizeof(notify_rates[0])); ++i) { + if (!strcmp(reason, notify_rates[i].reason)) { + min_interim = notify_rates[i].min_interim; + } + } + if (min_interim > 0) { + since_last.start = md_job_log_get_time_of_latest(job, log_msg_reason); + since_last.end = apr_time_now(); + if (since_last.start > 0 && md_timeperiod_length(&since_last) < min_interim) { + /* not enough time has passed since we sent the last notification + * for this reason. */ + md_log_perror(MD_LOG_MARK, MD_LOG_DEBUG, 0, p, APLOGNO(10267) + "%s: rate limiting notification about '%s'", job->mdomain, reason); + return APR_SUCCESS; + } + } + + if (!strcmp("renewed", reason)) { + if (mc->notify_cmd) { + cmdline = apr_psprintf(p, "%s %s", mc->notify_cmd, job->mdomain); + apr_tokenize_to_argv(cmdline, (char***)&argv, p); + rv = md_util_exec(p, argv[0], argv, NULL, &exit_code); + + if (APR_SUCCESS == rv && exit_code) rv = APR_EGENERAL; + if (APR_SUCCESS != rv) { + md_result_problem_printf(result, rv, MD_RESULT_LOG_ID(APLOGNO(10108)), + "MDNotifyCmd %s failed with exit code %d.", + mc->notify_cmd, exit_code); + md_result_log(result, MD_LOG_ERR); + md_job_log_append(job, "notify-error", result->problem, result->detail); + return rv; + } + } + md_log_perror(MD_LOG_MARK, MD_LOG_NOTICE, 0, p, APLOGNO(10059) + "The Managed Domain %s has been setup and changes " + "will be activated on next (graceful) server restart.", job->mdomain); + } + if (mc->message_cmd) { + cmdline = apr_psprintf(p, "%s %s %s", mc->message_cmd, reason, job->mdomain); + apr_tokenize_to_argv(cmdline, (char***)&argv, p); + rv = md_util_exec(p, argv[0], argv, NULL, &exit_code); + + if (APR_SUCCESS == rv && exit_code) rv = APR_EGENERAL; + if (APR_SUCCESS != rv) { + md_result_problem_printf(result, rv, MD_RESULT_LOG_ID(APLOGNO(10109)), + "MDMessageCmd %s failed with exit code %d.", + mc->message_cmd, exit_code); + md_result_log(result, MD_LOG_ERR); + md_job_log_append(job, "message-error", reason, result->detail); + return rv; + } + } + + md_job_log_append(job, log_msg_reason, NULL, NULL); + return APR_SUCCESS; +} + +static apr_status_t on_event(const char *event, const char *mdomain, void *baton, + md_job_t *job, md_result_t *result, apr_pool_t *p) +{ + (void)mdomain; + return notify(job, event, result, p, baton); +} + +/**************************************************************************************************/ +/* store setup */ + +static apr_status_t store_file_ev(void *baton, struct md_store_t *store, + md_store_fs_ev_t ev, unsigned int group, + const char *fname, apr_filetype_e ftype, + apr_pool_t *p) +{ + server_rec *s = baton; + apr_status_t rv; + + (void)store; + ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, s, "store event=%d on %s %s (group %d)", + ev, (ftype == APR_DIR)? "dir" : "file", fname, group); + + /* Directories in group CHALLENGES, STAGING and OCSP are written to + * under a different user. Give her ownership. + */ + if (ftype == APR_DIR) { + switch (group) { + case MD_SG_CHALLENGES: + case MD_SG_STAGING: + case MD_SG_OCSP: + rv = md_make_worker_accessible(fname, p); + if (APR_ENOTIMPL != rv) { + return rv; + } + break; + default: + break; + } + } + return APR_SUCCESS; +} + +static apr_status_t check_group_dir(md_store_t *store, md_store_group_t group, + apr_pool_t *p, server_rec *s) +{ + const char *dir; + apr_status_t rv; + + if (APR_SUCCESS == (rv = md_store_get_fname(&dir, store, group, NULL, NULL, p)) + && APR_SUCCESS == (rv = apr_dir_make_recursive(dir, MD_FPROT_D_UALL_GREAD, p))) { + rv = store_file_ev(s, store, MD_S_FS_EV_CREATED, group, dir, APR_DIR, p); + } + return rv; +} + +static apr_status_t setup_store(md_store_t **pstore, md_mod_conf_t *mc, + apr_pool_t *p, server_rec *s) +{ + const char *base_dir; + apr_status_t rv; + + base_dir = ap_server_root_relative(p, mc->base_dir); + + if (APR_SUCCESS != (rv = md_store_fs_init(pstore, p, base_dir))) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10046)"setup store for %s", base_dir); + goto leave; + } + + md_store_fs_set_event_cb(*pstore, store_file_ev, s); + if (APR_SUCCESS != (rv = check_group_dir(*pstore, MD_SG_CHALLENGES, p, s)) + || APR_SUCCESS != (rv = check_group_dir(*pstore, MD_SG_STAGING, p, s)) + || APR_SUCCESS != (rv = check_group_dir(*pstore, MD_SG_ACCOUNTS, p, s)) + || APR_SUCCESS != (rv = check_group_dir(*pstore, MD_SG_OCSP, p, s)) + ) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10047) + "setup challenges directory"); + goto leave; + } + +leave: + return rv; +} + +/**************************************************************************************************/ +/* post config handling */ + +static void merge_srv_config(md_t *md, md_srv_conf_t *base_sc, apr_pool_t *p) +{ + const char *contact; + + if (!md->sc) { + md->sc = base_sc; + } + + if (!md->ca_urls && md->sc->ca_urls) { + md->ca_urls = apr_array_copy(p, md->sc->ca_urls); + } + if (!md->ca_proto) { + md->ca_proto = md_config_gets(md->sc, MD_CONFIG_CA_PROTO); + } + if (!md->ca_agreement) { + md->ca_agreement = md_config_gets(md->sc, MD_CONFIG_CA_AGREEMENT); + } + contact = md_config_gets(md->sc, MD_CONFIG_CA_CONTACT); + if (md->contacts && md->contacts->nelts > 0) { + /* set explicitly */ + } + else if (contact && contact[0]) { + apr_array_clear(md->contacts); + APR_ARRAY_PUSH(md->contacts, const char *) = + md_util_schemify(p, contact, "mailto"); + } + else if( md->sc->s->server_admin && strcmp(DEFAULT_ADMIN, md->sc->s->server_admin)) { + apr_array_clear(md->contacts); + APR_ARRAY_PUSH(md->contacts, const char *) = + md_util_schemify(p, md->sc->s->server_admin, "mailto"); + } + if (md->renew_mode == MD_RENEW_DEFAULT) { + md->renew_mode = md_config_geti(md->sc, MD_CONFIG_DRIVE_MODE); + } + if (!md->renew_window) md_config_get_timespan(&md->renew_window, md->sc, MD_CONFIG_RENEW_WINDOW); + if (!md->warn_window) md_config_get_timespan(&md->warn_window, md->sc, MD_CONFIG_WARN_WINDOW); + if (md->transitive < 0) { + md->transitive = md_config_geti(md->sc, MD_CONFIG_TRANSITIVE); + } + if (!md->ca_challenges && md->sc->ca_challenges) { + md->ca_challenges = apr_array_copy(p, md->sc->ca_challenges); + } + if (md_pkeys_spec_is_empty(md->pks)) { + md->pks = md->sc->pks; + } + if (md->require_https < 0) { + md->require_https = md_config_geti(md->sc, MD_CONFIG_REQUIRE_HTTPS); + } + if (!md->ca_eab_kid) { + md->ca_eab_kid = md->sc->ca_eab_kid; + md->ca_eab_hmac = md->sc->ca_eab_hmac; + } + if (md->must_staple < 0) { + md->must_staple = md_config_geti(md->sc, MD_CONFIG_MUST_STAPLE); + } + if (md->stapling < 0) { + md->stapling = md_config_geti(md->sc, MD_CONFIG_STAPLING); + } +} + +static apr_status_t check_coverage(md_t *md, const char *domain, server_rec *s, + int *pupdates, apr_pool_t *p) +{ + if (md_contains(md, domain, 0)) { + return APR_SUCCESS; + } + else if (md->transitive) { + APR_ARRAY_PUSH(md->domains, const char*) = apr_pstrdup(p, domain); + *pupdates |= MD_UPD_DOMAINS; + return APR_SUCCESS; + } + else { + ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(10040) + "Virtual Host %s:%d matches Managed Domain '%s', but the " + "name/alias %s itself is not managed. A requested MD certificate " + "will not match ServerName.", + s->server_hostname, s->port, md->name, domain); + return APR_EINVAL; + } +} + +static apr_status_t md_cover_server(md_t *md, server_rec *s, int *pupdates, apr_pool_t *p) +{ + apr_status_t rv; + const char *name; + int i; + + if (APR_SUCCESS == (rv = check_coverage(md, s->server_hostname, s, pupdates, p))) { + ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s, + "md[%s]: auto add, covers name %s", md->name, s->server_hostname); + for (i = 0; s->names && i < s->names->nelts; ++i) { + name = APR_ARRAY_IDX(s->names, i, const char*); + if (APR_SUCCESS != (rv = check_coverage(md, name, s, pupdates, p))) { + break; + } + ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s, + "md[%s]: auto add, covers alias %s", md->name, name); + } + } + return rv; +} + +static int uses_port(server_rec *s, int port) +{ + server_addr_rec *sa; + int match = 0; + for (sa = s->addrs; sa; sa = sa->next) { + if (sa->host_port == port) { + /* host_addr might be general (0.0.0.0) or specific, we count this as match */ + match = 1; + } + else { + /* uses other port/wildcard */ + return 0; + } + } + return match; +} + +static apr_status_t detect_supported_protocols(md_mod_conf_t *mc, server_rec *s, + apr_pool_t *p, int log_level) +{ + ap_listen_rec *lr; + apr_sockaddr_t *sa; + int can_http, can_https; + + if (mc->can_http >= 0 && mc->can_https >= 0) goto set_and_leave; + + can_http = can_https = 0; + for (lr = ap_listeners; lr; lr = lr->next) { + for (sa = lr->bind_addr; sa; sa = sa->next) { + if (sa->port == mc->local_80 + && (!lr->protocol || !strncmp("http", lr->protocol, 4))) { + can_http = 1; + } + else if (sa->port == mc->local_443 + && (!lr->protocol || !strncmp("http", lr->protocol, 4))) { + can_https = 1; + } + } + } + if (mc->can_http < 0) mc->can_http = can_http; + if (mc->can_https < 0) mc->can_https = can_https; + ap_log_error(APLOG_MARK, log_level, 0, s, APLOGNO(10037) + "server seems%s reachable via http: and%s reachable via https:", + mc->can_http? "" : " not", mc->can_https? "" : " not"); +set_and_leave: + return md_reg_set_props(mc->reg, p, mc->can_http, mc->can_https); +} + +static server_rec *get_public_https_server(md_t *md, const char *domain, server_rec *base_server) +{ + md_srv_conf_t *sc; + md_mod_conf_t *mc; + server_rec *s; + server_rec *res = NULL; + request_rec r; + int i; + int check_port = 1; + + sc = md_config_get(base_server); + mc = sc->mc; + memset(&r, 0, sizeof(r)); + + if (md->ca_challenges && md->ca_challenges->nelts > 0) { + /* skip the port check if "tls-alpn-01" is pre-configured */ + check_port = !(md_array_str_index(md->ca_challenges, MD_AUTHZ_TYPE_TLSALPN01, 0, 0) >= 0); + } + + if (check_port && !mc->can_https) return NULL; + + /* find an ssl server matching domain from MD */ + for (s = base_server; s; s = s->next) { + sc = md_config_get(s); + if (!sc || !sc->is_ssl || !sc->assigned) continue; + if (base_server == s && !mc->manage_base_server) continue; + if (base_server != s && check_port && mc->local_443 > 0 && !uses_port(s, mc->local_443)) continue; + for (i = 0; i < sc->assigned->nelts; ++i) { + if (md == APR_ARRAY_IDX(sc->assigned, i, md_t*)) { + r.server = s; + if (ap_matches_request_vhost(&r, domain, s->port)) { + if (check_port) { + return s; + } + else { + /* there may be multiple matching servers because we ignore the port. + if possible, choose a server that supports the acme-tls/1 protocol */ + if (ap_is_allowed_protocol(NULL, NULL, s, PROTO_ACME_TLS_1)) { + return s; + } + res = s; + } + } + } + } + } + return res; +} + +static apr_status_t auto_add_domains(md_t *md, server_rec *base_server, apr_pool_t *p) +{ + md_srv_conf_t *sc; + server_rec *s; + apr_status_t rv = APR_SUCCESS; + int updates; + + /* Ad all domain names used in SSL VirtualHosts, if not already there */ + ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, base_server, + "md[%s]: auto add domains", md->name); + updates = 0; + for (s = base_server; s; s = s->next) { + sc = md_config_get(s); + if (!sc || !sc->is_ssl || !sc->assigned || sc->assigned->nelts != 1) continue; + if (md != APR_ARRAY_IDX(sc->assigned, 0, md_t*)) continue; + if (APR_SUCCESS != (rv = md_cover_server(md, s, &updates, p))) { + return rv; + } + } + return rv; +} + +static void init_acme_tls_1_domains(md_t *md, server_rec *base_server) +{ + md_srv_conf_t *sc; + md_mod_conf_t *mc; + server_rec *s; + int i; + const char *domain; + + /* Collect those domains that support the "acme-tls/1" protocol. This + * is part of the MD (and not tested dynamically), since challenge selection + * may be done outside the server, e.g. in the a2md command. */ + sc = md_config_get(base_server); + mc = sc->mc; + apr_array_clear(md->acme_tls_1_domains); + for (i = 0; i < md->domains->nelts; ++i) { + domain = APR_ARRAY_IDX(md->domains, i, const char*); + s = get_public_https_server(md, domain, base_server); + /* If we did not find a specific virtualhost for md and manage + * the base_server, that one is inspected */ + if (NULL == s && mc->manage_base_server) s = base_server; + if (NULL == s) { + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, base_server, APLOGNO(10168) + "%s: no https server_rec found for %s", md->name, domain); + continue; + } + if (!ap_is_allowed_protocol(NULL, NULL, s, PROTO_ACME_TLS_1)) { + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, base_server, APLOGNO(10169) + "%s: https server_rec for %s does not have protocol %s enabled", + md->name, domain, PROTO_ACME_TLS_1); + continue; + } + APR_ARRAY_PUSH(md->acme_tls_1_domains, const char*) = domain; + } +} + +static apr_status_t link_md_to_servers(md_mod_conf_t *mc, md_t *md, server_rec *base_server, + apr_pool_t *p) +{ + server_rec *s; + request_rec r; + md_srv_conf_t *sc; + int i; + const char *domain, *uri; + + sc = md_config_get(base_server); + + /* Assign the MD to all server_rec configs that it matches. If there already + * is an assigned MD not equal this one, the configuration is in error. + */ + memset(&r, 0, sizeof(r)); + for (s = base_server; s; s = s->next) { + if (!mc->manage_base_server && s == base_server) { + /* we shall not assign ourselves to the base server */ + continue; + } + + r.server = s; + for (i = 0; i < md->domains->nelts; ++i) { + domain = APR_ARRAY_IDX(md->domains, i, const char*); + + if (ap_matches_request_vhost(&r, domain, s->port) + || (md_dns_is_wildcard(p, domain) && md_dns_matches(domain, s->server_hostname))) { + /* Create a unique md_srv_conf_t record for this server, if there is none yet */ + sc = md_config_get_unique(s, p); + if (!sc->assigned) sc->assigned = apr_array_make(p, 2, sizeof(md_t*)); + + APR_ARRAY_PUSH(sc->assigned, md_t*) = md; + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, base_server, APLOGNO(10041) + "Server %s:%d matches md %s (config %s) for domain %s, " + "has now %d MDs", + s->server_hostname, s->port, md->name, sc->name, + domain, (int)sc->assigned->nelts); + + if (md->contacts && md->contacts->nelts > 0) { + /* set explicitly */ + } + else if (sc->ca_contact && sc->ca_contact[0]) { + uri = md_util_schemify(p, sc->ca_contact, "mailto"); + if (md_array_str_index(md->contacts, uri, 0, 0) < 0) { + APR_ARRAY_PUSH(md->contacts, const char *) = uri; + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, base_server, APLOGNO(10044) + "%s: added contact %s", md->name, uri); + } + } + else if (s->server_admin && strcmp(DEFAULT_ADMIN, s->server_admin)) { + uri = md_util_schemify(p, s->server_admin, "mailto"); + if (md_array_str_index(md->contacts, uri, 0, 0) < 0) { + APR_ARRAY_PUSH(md->contacts, const char *) = uri; + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, base_server, APLOGNO(10237) + "%s: added contact %s", md->name, uri); + } + } + break; + } + } + } + return APR_SUCCESS; +} + +static apr_status_t link_mds_to_servers(md_mod_conf_t *mc, server_rec *s, apr_pool_t *p) +{ + int i; + md_t *md; + apr_status_t rv = APR_SUCCESS; + + apr_array_clear(mc->unused_names); + for (i = 0; i < mc->mds->nelts; ++i) { + md = APR_ARRAY_IDX(mc->mds, i, md_t*); + if (APR_SUCCESS != (rv = link_md_to_servers(mc, md, s, p))) { + goto leave; + } + } +leave: + return rv; +} + +static apr_status_t merge_mds_with_conf(md_mod_conf_t *mc, apr_pool_t *p, + server_rec *base_server, int log_level) +{ + md_srv_conf_t *base_conf; + md_t *md, *omd; + const char *domain; + md_timeslice_t *ts; + apr_status_t rv = APR_SUCCESS; + int i, j; + + /* The global module configuration 'mc' keeps a list of all configured MDomains + * in the server. This list is collected during configuration processing and, + * in the post config phase, get updated from all merged server configurations + * before the server starts processing. + */ + base_conf = md_config_get(base_server); + md_config_get_timespan(&ts, base_conf, MD_CONFIG_RENEW_WINDOW); + if (ts) md_reg_set_renew_window_default(mc->reg, ts); + md_config_get_timespan(&ts, base_conf, MD_CONFIG_WARN_WINDOW); + if (ts) md_reg_set_warn_window_default(mc->reg, ts); + + /* Complete the properties of the MDs, now that we have the complete, merged + * server configurations. + */ + for (i = 0; i < mc->mds->nelts; ++i) { + md = APR_ARRAY_IDX(mc->mds, i, md_t*); + merge_srv_config(md, base_conf, p); + + /* Check that we have no overlap with the MDs already completed */ + for (j = 0; j < i; ++j) { + omd = APR_ARRAY_IDX(mc->mds, j, md_t*); + if ((domain = md_common_name(md, omd)) != NULL) { + ap_log_error(APLOG_MARK, APLOG_ERR, 0, base_server, APLOGNO(10038) + "two Managed Domains have an overlap in domain '%s'" + ", first definition in %s(line %d), second in %s(line %d)", + domain, md->defn_name, md->defn_line_number, + omd->defn_name, omd->defn_line_number); + return APR_EINVAL; + } + } + + if (md->cert_files && md->cert_files->nelts) { + if (!md->pkey_files || (md->cert_files->nelts != md->pkey_files->nelts)) { + ap_log_error(APLOG_MARK, APLOG_ERR, 0, base_server, APLOGNO(10170) + "The Managed Domain '%s' " + "needs one MDCertificateKeyFile for each MDCertificateFile.", + md->name); + return APR_EINVAL; + } + } + else if (md->pkey_files && md->pkey_files->nelts + && (!md->cert_files || !md->cert_files->nelts)) { + ap_log_error(APLOG_MARK, APLOG_ERR, 0, base_server, APLOGNO(10171) + "The Managed Domain '%s' " + "has MDCertificateKeyFile(s) but no MDCertificateFile.", + md->name); + return APR_EINVAL; + } + + if (APLOG_IS_LEVEL(base_server, log_level)) { + ap_log_error(APLOG_MARK, log_level, 0, base_server, APLOGNO(10039) + "Completed MD[%s, CA=%s, Proto=%s, Agreement=%s, renew-mode=%d " + "renew_window=%s, warn_window=%s", + md->name, md->ca_effective, md->ca_proto, md->ca_agreement, md->renew_mode, + md->renew_window? md_timeslice_format(md->renew_window, p) : "unset", + md->warn_window? md_timeslice_format(md->warn_window, p) : "unset"); + } + } + return rv; +} + +static apr_status_t check_invalid_duplicates(server_rec *base_server) +{ + server_rec *s; + md_srv_conf_t *sc; + + ap_log_error( APLOG_MARK, APLOG_TRACE1, 0, base_server, + "checking duplicate ssl assignments"); + for (s = base_server; s; s = s->next) { + sc = md_config_get(s); + if (!sc || !sc->assigned) continue; + + if (sc->assigned->nelts > 1 && sc->is_ssl) { + /* duplicate assignment to SSL VirtualHost, not allowed */ + ap_log_error(APLOG_MARK, APLOG_ERR, 0, base_server, APLOGNO(10042) + "conflict: %d MDs match to SSL VirtualHost %s, there can at most be one.", + (int)sc->assigned->nelts, s->server_hostname); + return APR_EINVAL; + } + } + return APR_SUCCESS; +} + +static apr_status_t check_usage(md_mod_conf_t *mc, md_t *md, server_rec *base_server, + apr_pool_t *p, apr_pool_t *ptemp) +{ + server_rec *s; + md_srv_conf_t *sc; + apr_status_t rv = APR_SUCCESS; + int i, has_ssl; + apr_array_header_t *servers; + + (void)p; + servers = apr_array_make(ptemp, 5, sizeof(server_rec*)); + has_ssl = 0; + for (s = base_server; s; s = s->next) { + sc = md_config_get(s); + if (!sc || !sc->assigned) continue; + for (i = 0; i < sc->assigned->nelts; ++i) { + if (md == APR_ARRAY_IDX(sc->assigned, i, md_t*)) { + APR_ARRAY_PUSH(servers, server_rec*) = s; + if (sc->is_ssl) has_ssl = 1; + } + } + } + + if (!has_ssl && md->require_https > MD_REQUIRE_OFF) { + /* We require https for this MD, but do we have a SSL vhost? */ + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, APLOGNO(10105) + "MD %s does not match any VirtualHost with 'SSLEngine on', " + "but is configured to require https. This cannot work.", md->name); + } + if (apr_is_empty_array(servers)) { + if (md->renew_mode != MD_RENEW_ALWAYS) { + /* Not an error, but looks suspicious */ + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, APLOGNO(10045) + "No VirtualHost matches Managed Domain %s", md->name); + APR_ARRAY_PUSH(mc->unused_names, const char*) = md->name; + } + } + return rv; +} + +static int init_cert_watch_status(md_mod_conf_t *mc, apr_pool_t *p, apr_pool_t *ptemp, server_rec *s) +{ + md_t *md; + md_result_t *result; + int i, count; + + /* Calculate the list of MD names which we need to watch: + * - all MDs that are used somewhere + * - all MDs in drive mode 'AUTO' that are not in 'unused_names' + */ + count = 0; + result = md_result_make(ptemp, APR_SUCCESS); + for (i = 0; i < mc->mds->nelts; ++i) { + md = APR_ARRAY_IDX(mc->mds, i, md_t*); + md_result_set(result, APR_SUCCESS, NULL); + md->watched = 0; + if (md->state == MD_S_ERROR) { + md_result_set(result, APR_EGENERAL, + "in error state, unable to drive forward. This " + "indicates an incomplete or inconsistent configuration. " + "Please check the log for warnings in this regard."); + continue; + } + + if (md->renew_mode == MD_RENEW_AUTO + && md_array_str_index(mc->unused_names, md->name, 0, 0) >= 0) { + /* This MD is not used in any virtualhost, do not watch */ + continue; + } + + if (md_will_renew_cert(md)) { + /* make a test init to detect early errors. */ + md_reg_test_init(mc->reg, md, mc->env, result, p); + if (APR_SUCCESS != result->status && result->detail) { + apr_hash_set(mc->init_errors, md->name, APR_HASH_KEY_STRING, apr_pstrdup(p, result->detail)); + ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(10173) + "md[%s]: %s", md->name, result->detail); + } + } + + md->watched = 1; + ++count; + } + return count; +} + +static apr_status_t md_post_config_before_ssl(apr_pool_t *p, apr_pool_t *plog, + apr_pool_t *ptemp, server_rec *s) +{ + void *data = NULL; + const char *mod_md_init_key = "mod_md_init_counter"; + md_srv_conf_t *sc; + md_mod_conf_t *mc; + apr_status_t rv = APR_SUCCESS; + int dry_run = 0, log_level = APLOG_DEBUG; + md_store_t *store; + + apr_pool_userdata_get(&data, mod_md_init_key, s->process->pool); + if (data == NULL) { + /* At the first start, httpd makes a config check dry run. It + * runs all config hooks to check if it can. If so, it does + * this all again and starts serving requests. + * + * On a dry run, we therefore do all the cheap config things we + * need to do to find out if the settings are ok. More expensive + * things we delay to the real run. + */ + dry_run = 1; + log_level = APLOG_TRACE1; + ap_log_error( APLOG_MARK, log_level, 0, s, APLOGNO(10070) + "initializing post config dry run"); + apr_pool_userdata_set((const void *)1, mod_md_init_key, + apr_pool_cleanup_null, s->process->pool); + } + else { + ap_log_error( APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(10071) + "mod_md (v%s), initializing...", MOD_MD_VERSION); + } + + (void)plog; + init_setups(p, s); + md_log_set(log_is_level, log_print, NULL); + + md_config_post_config(s, p); + sc = md_config_get(s); + mc = sc->mc; + mc->dry_run = dry_run; + + md_event_init(p); + md_event_subscribe(on_event, mc); + + rv = setup_store(&store, mc, p, s); + if (APR_SUCCESS != rv) goto leave; + + rv = md_reg_create(&mc->reg, p, store, mc->proxy_url, mc->ca_certs, + mc->min_delay, mc->retry_failover, + mc->use_store_locks, mc->lock_wait_timeout); + if (APR_SUCCESS != rv) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10072) "setup md registry"); + goto leave; + } + + /* renew on 30% remaining /*/ + rv = md_ocsp_reg_make(&mc->ocsp, p, store, mc->ocsp_renew_window, + AP_SERVER_BASEVERSION, mc->proxy_url, + mc->min_delay); + if (APR_SUCCESS != rv) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10196) "setup ocsp registry"); + goto leave; + } + + init_ssl(); + + /* How to bootstrap this module: + * 1. find out if we know if http: and/or https: requests will arrive + * 2. apply the now complete configuration settings to the MDs + * 3. Link MDs to the server_recs they are used in. Detect unused MDs. + * 4. Update the store with the MDs. Change domain names, create new MDs, etc. + * Basically all MD properties that are configured directly. + * WARNING: this may change the name of an MD. If an MD loses the first + * of its domain names, it first gets the new first one as name. The + * store will find the old settings and "recover" the previous name. + * 5. Load any staged data from previous driving. + * 6. on a dry run, this is all we do + * 7. Read back the MD properties that reflect the existence and aspect of + * credentials that are in the store (or missing there). + * Expiry times, MD state, etc. + * 8. Determine the list of MDs that need driving/supervision. + * 9. Cleanup any left-overs in registry/store that are no longer needed for + * the list of MDs as we know it now. + * 10. If this list is non-empty, setup a watchdog to run. + */ + /*1*/ + if (APR_SUCCESS != (rv = detect_supported_protocols(mc, s, p, log_level))) goto leave; + /*2*/ + if (APR_SUCCESS != (rv = merge_mds_with_conf(mc, p, s, log_level))) goto leave; + /*3*/ + if (APR_SUCCESS != (rv = link_mds_to_servers(mc, s, p))) goto leave; + /*4*/ + if (APR_SUCCESS != (rv = md_reg_lock_global(mc->reg, ptemp))) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10398) + "unable to obtain global registry lock, " + "renewed certificates may remain inactive on " + "this httpd instance!"); + /* FIXME: or should we fail the server start/reload here? */ + rv = APR_SUCCESS; + goto leave; + } + if (APR_SUCCESS != (rv = md_reg_sync_start(mc->reg, mc->mds, ptemp))) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10073) + "syncing %d mds to registry", mc->mds->nelts); + goto leave; + } + /*5*/ + md_reg_load_stagings(mc->reg, mc->mds, mc->env, p); +leave: + md_reg_unlock_global(mc->reg, ptemp); + return rv; +} + +static apr_status_t md_post_config_after_ssl(apr_pool_t *p, apr_pool_t *plog, + apr_pool_t *ptemp, server_rec *s) +{ + md_srv_conf_t *sc; + apr_status_t rv = APR_SUCCESS; + md_mod_conf_t *mc; + int watched, i; + md_t *md; + + (void)ptemp; + (void)plog; + sc = md_config_get(s); + + /*6*/ + if (!sc || !sc->mc || sc->mc->dry_run) goto leave; + mc = sc->mc; + + /*7*/ + if (APR_SUCCESS != (rv = check_invalid_duplicates(s))) { + goto leave; + } + apr_array_clear(mc->unused_names); + for (i = 0; i < mc->mds->nelts; ++i) { + md = APR_ARRAY_IDX(mc->mds, i, md_t *); + + ap_log_error( APLOG_MARK, APLOG_TRACE2, rv, s, "md{%s}: auto_add", md->name); + if (APR_SUCCESS != (rv = auto_add_domains(md, s, p))) { + goto leave; + } + init_acme_tls_1_domains(md, s); + ap_log_error( APLOG_MARK, APLOG_TRACE2, rv, s, "md{%s}: check_usage", md->name); + if (APR_SUCCESS != (rv = check_usage(mc, md, s, p, ptemp))) { + goto leave; + } + ap_log_error( APLOG_MARK, APLOG_TRACE2, rv, s, "md{%s}: sync_finish", md->name); + if (APR_SUCCESS != (rv = md_reg_sync_finish(mc->reg, md, p, ptemp))) { + ap_log_error( APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10172) + "md[%s]: error syncing to store", md->name); + goto leave; + } + } + /*8*/ + ap_log_error( APLOG_MARK, APLOG_TRACE2, rv, s, "init_cert_watch"); + watched = init_cert_watch_status(mc, p, ptemp, s); + /*9*/ + ap_log_error( APLOG_MARK, APLOG_TRACE2, rv, s, "cleanup challenges"); + md_reg_cleanup_challenges(mc->reg, p, ptemp, mc->mds); + + /* From here on, the domains in the registry are readonly + * and only staging/challenges may be manipulated */ + md_reg_freeze_domains(mc->reg, mc->mds); + + if (watched) { + /*10*/ + ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, s, APLOGNO(10074) + "%d out of %d mds need watching", watched, mc->mds->nelts); + + md_http_use_implementation(md_curl_get_impl(p)); + rv = md_renew_start_watching(mc, s, p); + } + else { + ap_log_error( APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(10075) "no mds to supervise"); + } + + if (!mc->ocsp || md_ocsp_count(mc->ocsp) == 0) { + ap_log_error( APLOG_MARK, APLOG_TRACE1, 0, s, "no ocsp to manage"); + goto leave; + } + + md_http_use_implementation(md_curl_get_impl(p)); + rv = md_ocsp_start_watching(mc, s, p); + +leave: + ap_log_error( APLOG_MARK, APLOG_TRACE2, rv, s, "post_config done"); + return rv; +} + +/**************************************************************************************************/ +/* connection context */ + +typedef struct { + const char *protocol; +} md_conn_ctx; + +static const char *md_protocol_get(const conn_rec *c) +{ + md_conn_ctx *ctx; + + ctx = (md_conn_ctx*)ap_get_module_config(c->conn_config, &md_module); + return ctx? ctx->protocol : NULL; +} + +/**************************************************************************************************/ +/* ALPN handling */ + +static int md_protocol_propose(conn_rec *c, request_rec *r, + server_rec *s, + const apr_array_header_t *offers, + apr_array_header_t *proposals) +{ + (void)s; + if (!r && offers && ap_ssl_conn_is_ssl(c) + && ap_array_str_contains(offers, PROTO_ACME_TLS_1)) { + ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, + "proposing protocol '%s'", PROTO_ACME_TLS_1); + APR_ARRAY_PUSH(proposals, const char*) = PROTO_ACME_TLS_1; + return OK; + } + return DECLINED; +} + +static int md_protocol_switch(conn_rec *c, request_rec *r, server_rec *s, + const char *protocol) +{ + md_conn_ctx *ctx; + + (void)s; + if (!r && ap_ssl_conn_is_ssl(c) && !strcmp(PROTO_ACME_TLS_1, protocol)) { + ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, + "switching protocol '%s'", PROTO_ACME_TLS_1); + ctx = apr_pcalloc(c->pool, sizeof(*ctx)); + ctx->protocol = PROTO_ACME_TLS_1; + ap_set_module_config(c->conn_config, &md_module, ctx); + + c->keepalive = AP_CONN_CLOSE; + return OK; + } + return DECLINED; +} + + +/**************************************************************************************************/ +/* Access API to other httpd components */ + +static void fallback_fnames(apr_pool_t *p, md_pkey_spec_t *kspec, char **keyfn, char **certfn ) +{ + *keyfn = apr_pstrcat(p, "fallback-", md_pkey_filename(kspec, p), NULL); + *certfn = apr_pstrcat(p, "fallback-", md_chain_filename(kspec, p), NULL); +} + +static apr_status_t make_fallback_cert(md_store_t *store, const md_t *md, md_pkey_spec_t *kspec, + server_rec *s, apr_pool_t *p, char *keyfn, char *crtfn) +{ + md_pkey_t *pkey; + md_cert_t *cert; + apr_status_t rv; + + if (APR_SUCCESS != (rv = md_pkey_gen(&pkey, p, kspec)) + || APR_SUCCESS != (rv = md_store_save(store, p, MD_SG_DOMAINS, md->name, + keyfn, MD_SV_PKEY, (void*)pkey, 0)) + || APR_SUCCESS != (rv = md_cert_self_sign(&cert, "Apache Managed Domain Fallback", + md->domains, pkey, apr_time_from_sec(14 * MD_SECS_PER_DAY), p)) + || APR_SUCCESS != (rv = md_store_save(store, p, MD_SG_DOMAINS, md->name, + crtfn, MD_SV_CERT, (void*)cert, 0))) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10174) + "%s: make fallback %s certificate", md->name, md_pkey_spec_name(kspec)); + } + return rv; +} + +static apr_status_t get_certificates(server_rec *s, apr_pool_t *p, int fallback, + apr_array_header_t **pcert_files, + apr_array_header_t **pkey_files) +{ + apr_status_t rv = APR_ENOENT; + md_srv_conf_t *sc; + md_reg_t *reg; + md_store_t *store; + const md_t *md; + apr_array_header_t *key_files, *chain_files; + const char *keyfile, *chainfile; + int i; + + *pkey_files = *pcert_files = NULL; + key_files = apr_array_make(p, 5, sizeof(const char*)); + chain_files = apr_array_make(p, 5, sizeof(const char*)); + + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(10113) + "get_certificates called for vhost %s.", s->server_hostname); + + sc = md_config_get(s); + if (!sc) { + ap_log_error(APLOG_MARK, APLOG_TRACE2, 0, s, + "asked for certificate of server %s which has no md config", + s->server_hostname); + return APR_ENOENT; + } + + assert(sc->mc); + reg = sc->mc->reg; + assert(reg); + + sc->is_ssl = 1; + + if (!sc->assigned) { + /* With the new hooks in mod_ssl, we are invoked for all server_rec. It is + * therefore normal, when we have nothing to add here. */ + return APR_ENOENT; + } + else if (sc->assigned->nelts != 1) { + if (!fallback) { + ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(10238) + "conflict: %d MDs match Virtualhost %s which uses SSL, however " + "there can be at most 1.", + (int)sc->assigned->nelts, s->server_hostname); + } + return APR_EINVAL; + } + md = APR_ARRAY_IDX(sc->assigned, 0, const md_t*); + + if (md->cert_files && md->cert_files->nelts) { + apr_array_cat(chain_files, md->cert_files); + apr_array_cat(key_files, md->pkey_files); + rv = APR_SUCCESS; + } + else { + md_pkey_spec_t *spec; + + for (i = 0; i < md_cert_count(md); ++i) { + spec = md_pkeys_spec_get(md->pks, i); + rv = md_reg_get_cred_files(&keyfile, &chainfile, reg, MD_SG_DOMAINS, md, spec, p); + if (APR_SUCCESS == rv) { + APR_ARRAY_PUSH(key_files, const char*) = keyfile; + APR_ARRAY_PUSH(chain_files, const char*) = chainfile; + } + else if (APR_STATUS_IS_ENOENT(rv)) { + /* certificate for this pkey is not available, others might + * if pkeys have been added for a running mdomain. + * see issue #260 */ + rv = APR_SUCCESS; + } + else if (!APR_STATUS_IS_ENOENT(rv)) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(10110) + "retrieving credentials for MD %s (%s)", + md->name, md_pkey_spec_name(spec)); + return rv; + } + } + + if (md_array_is_empty(key_files)) { + if (fallback) { + /* Provide temporary, self-signed certificate as fallback, so that + * clients do not get obscure TLS handshake errors or will see a fallback + * virtual host that is not intended to be served here. */ + char *kfn, *cfn; + + store = md_reg_store_get(reg); + assert(store); + + for (i = 0; i < md_cert_count(md); ++i) { + spec = md_pkeys_spec_get(md->pks, i); + fallback_fnames(p, spec, &kfn, &cfn); + + md_store_get_fname(&keyfile, store, MD_SG_DOMAINS, md->name, kfn, p); + md_store_get_fname(&chainfile, store, MD_SG_DOMAINS, md->name, cfn, p); + if (!md_file_exists(keyfile, p) || !md_file_exists(chainfile, p)) { + if (APR_SUCCESS != (rv = make_fallback_cert(store, md, spec, s, p, kfn, cfn))) { + return rv; + } + } + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(10116) + "%s: providing %s fallback certificate for server %s", + md->name, md_pkey_spec_name(spec), s->server_hostname); + APR_ARRAY_PUSH(key_files, const char*) = keyfile; + APR_ARRAY_PUSH(chain_files, const char*) = chainfile; + } + rv = APR_EAGAIN; + goto leave; + } + } + } + ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, s, APLOGNO(10077) + "%s[state=%d]: providing certificates for server %s", + md->name, md->state, s->server_hostname); +leave: + if (!md_array_is_empty(key_files) && !md_array_is_empty(chain_files)) { + *pkey_files = key_files; + *pcert_files = chain_files; + } + else if (APR_SUCCESS == rv) { + rv = APR_ENOENT; + } + return rv; +} + +static int md_add_cert_files(server_rec *s, apr_pool_t *p, + apr_array_header_t *cert_files, + apr_array_header_t *key_files) +{ + apr_array_header_t *md_cert_files; + apr_array_header_t *md_key_files; + apr_status_t rv; + + ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s, "hook ssl_add_cert_files for %s", + s->server_hostname); + rv = get_certificates(s, p, 0, &md_cert_files, &md_key_files); + if (APR_SUCCESS == rv) { + if (!apr_is_empty_array(cert_files)) { + /* downgraded fromm WARNING to DEBUG, since installing separate certificates + * may be a valid use case. */ + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(10084) + "host '%s' is covered by a Managed Domain, but " + "certificate/key files are already configured " + "for it (most likely via SSLCertificateFile).", + s->server_hostname); + } + ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s, + "host '%s' is covered by a Managed Domaina and " + "is being provided with %d key/certificate files.", + s->server_hostname, md_cert_files->nelts); + apr_array_cat(cert_files, md_cert_files); + apr_array_cat(key_files, md_key_files); + return DONE; + } + return DECLINED; +} + +static int md_add_fallback_cert_files(server_rec *s, apr_pool_t *p, + apr_array_header_t *cert_files, + apr_array_header_t *key_files) +{ + apr_array_header_t *md_cert_files; + apr_array_header_t *md_key_files; + apr_status_t rv; + + ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s, "hook ssl_add_fallback_cert_files for %s", + s->server_hostname); + rv = get_certificates(s, p, 1, &md_cert_files, &md_key_files); + if (APR_EAGAIN == rv) { + apr_array_cat(cert_files, md_cert_files); + apr_array_cat(key_files, md_key_files); + return DONE; + } + return DECLINED; +} + +static int md_answer_challenge(conn_rec *c, const char *servername, + const char **pcert_pem, const char **pkey_pem) +{ + const char *protocol; + int hook_rv = DECLINED; + apr_status_t rv = APR_ENOENT; + md_srv_conf_t *sc; + md_store_t *store; + char *cert_name, *pkey_name; + const char *cert_pem, *key_pem; + int i; + + if (!servername + || !(protocol = md_protocol_get(c)) + || strcmp(PROTO_ACME_TLS_1, protocol)) { + goto cleanup; + } + sc = md_config_get(c->base_server); + if (!sc || !sc->mc->reg) goto cleanup; + + ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, + "Answer challenge[tls-alpn-01] for %s", servername); + store = md_reg_store_get(sc->mc->reg); + + for (i = 0; i < md_pkeys_spec_count( sc->pks ); i++) { + tls_alpn01_fnames(c->pool, md_pkeys_spec_get(sc->pks,i), + &pkey_name, &cert_name); + + rv = md_store_load(store, MD_SG_CHALLENGES, servername, cert_name, MD_SV_TEXT, + (void**)&cert_pem, c->pool); + if (APR_STATUS_IS_ENOENT(rv)) continue; + if (APR_SUCCESS != rv) goto cleanup; + + rv = md_store_load(store, MD_SG_CHALLENGES, servername, pkey_name, MD_SV_TEXT, + (void**)&key_pem, c->pool); + if (APR_STATUS_IS_ENOENT(rv)) continue; + if (APR_SUCCESS != rv) goto cleanup; + + ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, + "Found challenge cert %s, key %s for %s", + cert_name, pkey_name, servername); + *pcert_pem = cert_pem; + *pkey_pem = key_pem; + hook_rv = OK; + break; + } + + if (DECLINED == hook_rv) { + ap_log_cerror(APLOG_MARK, APLOG_INFO, rv, c, APLOGNO(10080) + "%s: unknown tls-alpn-01 challenge host", servername); + } + +cleanup: + return hook_rv; +} + + +/**************************************************************************************************/ +/* ACME 'http-01' challenge responses */ + +#define WELL_KNOWN_PREFIX "/.well-known/" +#define ACME_CHALLENGE_PREFIX WELL_KNOWN_PREFIX"acme-challenge/" + +static int md_http_challenge_pr(request_rec *r) +{ + apr_bucket_brigade *bb; + const md_srv_conf_t *sc; + const char *name, *data; + md_reg_t *reg; + const md_t *md; + apr_status_t rv; + + if (r->parsed_uri.path + && !strncmp(ACME_CHALLENGE_PREFIX, r->parsed_uri.path, sizeof(ACME_CHALLENGE_PREFIX)-1)) { + sc = ap_get_module_config(r->server->module_config, &md_module); + if (sc && sc->mc) { + ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, + "access inside /.well-known/acme-challenge for %s%s", + r->hostname, r->parsed_uri.path); + md = md_get_by_domain(sc->mc->mds, r->hostname); + name = r->parsed_uri.path + sizeof(ACME_CHALLENGE_PREFIX)-1; + reg = sc && sc->mc? sc->mc->reg : NULL; + + if (md && md->ca_challenges + && md_array_str_index(md->ca_challenges, MD_AUTHZ_CHA_HTTP_01, 0, 1) < 0) { + /* The MD this challenge is for does not allow http-01 challanges, + * we have to decline. See #279 for a setup example where this + * is necessary. + */ + return DECLINED; + } + + if (strlen(name) && !ap_strchr_c(name, '/') && reg) { + md_store_t *store = md_reg_store_get(reg); + + rv = md_store_load(store, MD_SG_CHALLENGES, r->hostname, + MD_FN_HTTP01, MD_SV_TEXT, (void**)&data, r->pool); + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, + "loading challenge for %s (%s)", r->hostname, r->uri); + if (APR_SUCCESS == rv) { + apr_size_t len = strlen(data); + + if (r->method_number != M_GET) { + return HTTP_NOT_IMPLEMENTED; + } + /* A GET on a challenge resource for a hostname we are + * configured for. Let's send the content back */ + r->status = HTTP_OK; + apr_table_setn(r->headers_out, "Content-Length", apr_ltoa(r->pool, (long)len)); + + bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); + apr_brigade_write(bb, NULL, NULL, data, len); + ap_pass_brigade(r->output_filters, bb); + apr_brigade_cleanup(bb); + + return DONE; + } + else if (!md || md->renew_mode == MD_RENEW_MANUAL + || (md->cert_files && md->cert_files->nelts + && md->renew_mode == MD_RENEW_AUTO)) { + /* The request hostname is not for a domain - or at least not for + * a domain that we renew ourselves. We are not + * the sole authority here for /.well-known/acme-challenge (see PR62189). + * So, we decline to handle this and give others a chance to provide + * the answer. + */ + return DECLINED; + } + else if (APR_STATUS_IS_ENOENT(rv)) { + return HTTP_NOT_FOUND; + } + ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(10081) + "loading challenge %s from store", name); + return HTTP_INTERNAL_SERVER_ERROR; + } + } + } + return DECLINED; +} + +/**************************************************************************************************/ +/* Require Https hook */ + +static int md_require_https_maybe(request_rec *r) +{ + const md_srv_conf_t *sc; + apr_uri_t uri; + const char *s, *host; + const md_t *md; + int status; + + /* Requests outside the /.well-known path are subject to possible + * https: redirects or HSTS header additions. + */ + sc = ap_get_module_config(r->server->module_config, &md_module); + if (!sc || !sc->assigned || !sc->assigned->nelts || !r->parsed_uri.path + || !strncmp(WELL_KNOWN_PREFIX, r->parsed_uri.path, sizeof(WELL_KNOWN_PREFIX)-1)) { + goto declined; + } + + host = ap_get_server_name_for_url(r); + md = md_get_for_domain(r->server, host); + if (!md) goto declined; + + if (ap_ssl_conn_is_ssl(r->connection)) { + /* Using https: + * if 'permanent' and no one else set a HSTS header already, do it */ + if (md->require_https == MD_REQUIRE_PERMANENT + && sc->mc->hsts_header && !apr_table_get(r->headers_out, MD_HSTS_HEADER)) { + apr_table_setn(r->headers_out, MD_HSTS_HEADER, sc->mc->hsts_header); + } + } + else { + if (md->require_https > MD_REQUIRE_OFF) { + /* Not using https:, but require it. Redirect. */ + if (r->method_number == M_GET) { + /* safe to use the old-fashioned codes */ + status = ((MD_REQUIRE_PERMANENT == md->require_https)? + HTTP_MOVED_PERMANENTLY : HTTP_MOVED_TEMPORARILY); + } + else { + /* these should keep the method unchanged on retry */ + status = ((MD_REQUIRE_PERMANENT == md->require_https)? + HTTP_PERMANENT_REDIRECT : HTTP_TEMPORARY_REDIRECT); + } + + s = ap_construct_url(r->pool, r->uri, r); + if (APR_SUCCESS == apr_uri_parse(r->pool, s, &uri)) { + uri.scheme = (char*)"https"; + uri.port = 443; + uri.port_str = (char*)"443"; + uri.query = r->parsed_uri.query; + uri.fragment = r->parsed_uri.fragment; + s = apr_uri_unparse(r->pool, &uri, APR_URI_UNP_OMITUSERINFO); + if (s && *s) { + apr_table_setn(r->headers_out, "Location", s); + return status; + } + } + } + } +declined: + return DECLINED; +} + +/* Runs once per created child process. Perform any process + * related initialization here. + */ +static void md_child_init(apr_pool_t *pool, server_rec *s) +{ + (void)pool; + (void)s; +} + +/* Install this module into the apache2 infrastructure. + */ +static void md_hooks(apr_pool_t *pool) +{ + static const char *const mod_ssl[] = { "mod_ssl.c", "mod_tls.c", NULL}; + static const char *const mod_wd[] = { "mod_watchdog.c", NULL}; + + /* Leave the ssl initialization to mod_ssl or friends. */ + md_acme_init(pool, AP_SERVER_BASEVERSION, 0); + + ap_log_perror(APLOG_MARK, APLOG_TRACE1, 0, pool, "installing hooks"); + + /* Run once after configuration is set, before mod_ssl. + * Run again after mod_ssl is done. + */ + ap_hook_post_config(md_post_config_before_ssl, NULL, mod_ssl, APR_HOOK_MIDDLE); + ap_hook_post_config(md_post_config_after_ssl, mod_ssl, mod_wd, APR_HOOK_LAST); + + /* Run once after a child process has been created. + */ + ap_hook_child_init(md_child_init, NULL, mod_ssl, APR_HOOK_MIDDLE); + + /* answer challenges *very* early, before any configured authentication may strike */ + ap_hook_post_read_request(md_require_https_maybe, mod_ssl, NULL, APR_HOOK_MIDDLE); + ap_hook_post_read_request(md_http_challenge_pr, NULL, NULL, APR_HOOK_MIDDLE); + + ap_hook_protocol_propose(md_protocol_propose, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_protocol_switch(md_protocol_switch, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_protocol_get(md_protocol_get, NULL, NULL, APR_HOOK_MIDDLE); + + /* Status request handlers and contributors */ + ap_hook_post_read_request(md_http_cert_status, NULL, mod_ssl, APR_HOOK_MIDDLE); + APR_OPTIONAL_HOOK(ap, status_hook, md_domains_status_hook, NULL, NULL, APR_HOOK_MIDDLE); + APR_OPTIONAL_HOOK(ap, status_hook, md_ocsp_status_hook, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_handler(md_status_handler, NULL, NULL, APR_HOOK_MIDDLE); + + ap_hook_ssl_answer_challenge(md_answer_challenge, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_ssl_add_cert_files(md_add_cert_files, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_ssl_add_fallback_cert_files(md_add_fallback_cert_files, NULL, NULL, APR_HOOK_MIDDLE); + +#if AP_MODULE_MAGIC_AT_LEAST(20120211, 105) + ap_hook_ssl_ocsp_prime_hook(md_ocsp_prime_status, NULL, NULL, APR_HOOK_MIDDLE); + ap_hook_ssl_ocsp_get_resp_hook(md_ocsp_provide_status, NULL, NULL, APR_HOOK_MIDDLE); +#else +#error "This version of mod_md requires Apache httpd 2.4.48 or newer." +#endif /* AP_MODULE_MAGIC_AT_LEAST() */ +} + |