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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
commit | fe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch) | |
tree | b80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /modules/generators/mod_suexec.c | |
parent | Initial commit. (diff) | |
download | apache2-upstream.tar.xz apache2-upstream.zip |
Adding upstream version 2.4.56.upstream/2.4.56upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | modules/generators/mod_suexec.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/modules/generators/mod_suexec.c b/modules/generators/mod_suexec.c new file mode 100644 index 0000000..a71b0a8 --- /dev/null +++ b/modules/generators/mod_suexec.c @@ -0,0 +1,139 @@ +/* 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 "httpd.h" +#include "http_config.h" +#include "http_core.h" +#include "http_log.h" +#include "http_request.h" +#include "apr_strings.h" +#include "unixd.h" +#include "mpm_common.h" +#include "mod_suexec.h" + +module AP_MODULE_DECLARE_DATA suexec_module; + +/* + * Create a configuration specific to this module for a server or directory + * location, and fill it with the default settings. + */ +static void *mkconfig(apr_pool_t *p) +{ + suexec_config_t *cfg = apr_palloc(p, sizeof(suexec_config_t)); + + cfg->active = 0; + return cfg; +} + +/* + * Respond to a callback to create configuration record for a server or + * vhost environment. + */ +static void *create_mconfig_for_server(apr_pool_t *p, server_rec *s) +{ + return mkconfig(p); +} + +/* + * Respond to a callback to create a config record for a specific directory. + */ +static void *create_mconfig_for_directory(apr_pool_t *p, char *dir) +{ + return mkconfig(p); +} + +static const char *set_suexec_ugid(cmd_parms *cmd, void *mconfig, + const char *uid, const char *gid) +{ + suexec_config_t *cfg = (suexec_config_t *) mconfig; + const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT); + + if (err != NULL) { + return err; + } + + if (!ap_unixd_config.suexec_enabled) { + return apr_pstrcat(cmd->pool, "SuexecUserGroup configured, but " + "suEXEC is disabled: ", + ap_unixd_config.suexec_disabled_reason, NULL); + } + + cfg->ugid.uid = ap_uname2id(uid); + cfg->ugid.gid = ap_gname2id(gid); + cfg->ugid.userdir = 0; + cfg->active = 1; + + return NULL; +} + +static ap_unix_identity_t *get_suexec_id_doer(const request_rec *r) +{ + suexec_config_t *cfg = + (suexec_config_t *) ap_get_module_config(r->per_dir_config, &suexec_module); + + return cfg->active ? &cfg->ugid : NULL; +} + +#define SUEXEC_POST_CONFIG_USERDATA "suexec_post_config_userdata" +static int suexec_post_config(apr_pool_t *p, apr_pool_t *plog, + apr_pool_t *ptemp, server_rec *s) +{ + void *reported; + + apr_pool_userdata_get(&reported, SUEXEC_POST_CONFIG_USERDATA, + s->process->pool); + + if ((reported == NULL) && ap_unixd_config.suexec_enabled) { + ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, APLOGNO(01232) + "suEXEC mechanism enabled (wrapper: %s)", SUEXEC_BIN); + + apr_pool_userdata_set((void *)1, SUEXEC_POST_CONFIG_USERDATA, + apr_pool_cleanup_null, s->process->pool); + } + + return OK; +} +#undef SUEXEC_POST_CONFIG_USERDATA + +/* + * Define the directives specific to this module. This structure is referenced + * later by the 'module' structure. + */ +static const command_rec suexec_cmds[] = +{ + /* XXX - Another important reason not to allow this in .htaccess is that + * the ap_[ug]name2id() is not thread-safe */ + AP_INIT_TAKE2("SuexecUserGroup", set_suexec_ugid, NULL, RSRC_CONF, + "User and group for spawned processes"), + { NULL } +}; + +static void suexec_hooks(apr_pool_t *p) +{ + ap_hook_get_suexec_identity(get_suexec_id_doer,NULL,NULL,APR_HOOK_MIDDLE); + ap_hook_post_config(suexec_post_config,NULL,NULL,APR_HOOK_MIDDLE); +} + +AP_DECLARE_MODULE(suexec) = +{ + STANDARD20_MODULE_STUFF, + create_mconfig_for_directory, /* create per-dir config */ + NULL, /* merge per-dir config */ + create_mconfig_for_server, /* server config */ + NULL, /* merge server config */ + suexec_cmds, /* command table */ + suexec_hooks /* register hooks */ +}; |