| /* 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. |
| */ |
| |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| #include "apr_strings.h" |
| #include "apr_dbm.h" |
| #include "apr_md5.h" |
| |
| #include "apr_version.h" |
| #if !APR_VERSION_AT_LEAST(2,0,0) |
| #include "apu_version.h" |
| #endif |
| |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "ap_provider.h" |
| #include "http_core.h" |
| #include "http_log.h" |
| #include "http_protocol.h" |
| #include "http_request.h" /* for ap_hook_(check_user_id | auth_checker)*/ |
| |
| #include "mod_auth.h" |
| #include "mod_authz_owner.h" |
| |
| typedef struct { |
| const char *grpfile; |
| const char *dbmtype; |
| } authz_dbm_config_rec; |
| |
| |
| /* This should go into APR; perhaps with some nice |
| * caching/locking/flocking of the open dbm file. |
| */ |
| static char *get_dbm_entry_as_str(apr_pool_t *pool, apr_dbm_t *f, char *key) |
| { |
| apr_datum_t d, q; |
| q.dptr = key; |
| |
| #ifndef NETSCAPE_DBM_COMPAT |
| q.dsize = strlen(q.dptr); |
| #else |
| q.dsize = strlen(q.dptr) + 1; |
| #endif |
| |
| if (apr_dbm_fetch(f, q, &d) == APR_SUCCESS && d.dptr) { |
| return apr_pstrmemdup(pool, d.dptr, d.dsize); |
| } |
| |
| return NULL; |
| } |
| |
| static void *create_authz_dbm_dir_config(apr_pool_t *p, char *d) |
| { |
| authz_dbm_config_rec *conf = apr_palloc(p, sizeof(*conf)); |
| |
| conf->grpfile = NULL; |
| conf->dbmtype = "default"; |
| |
| return conf; |
| } |
| |
| static const command_rec authz_dbm_cmds[] = |
| { |
| AP_INIT_TAKE1("AuthDBMGroupFile", ap_set_file_slot, |
| (void *)APR_OFFSETOF(authz_dbm_config_rec, grpfile), |
| OR_AUTHCFG, "database file containing group names and member user IDs"), |
| AP_INIT_TAKE1("AuthzDBMType", ap_set_string_slot, |
| (void *)APR_OFFSETOF(authz_dbm_config_rec, dbmtype), |
| OR_AUTHCFG, "what type of DBM file the group file is"), |
| {NULL} |
| }; |
| |
| module AP_MODULE_DECLARE_DATA authz_dbm_module; |
| |
| /* We do something strange with the group file. If the group file |
| * contains any : we assume the format is |
| * key=username value=":"groupname [":"anything here is ignored] |
| * otherwise we now (0.8.14+) assume that the format is |
| * key=username value=groupname |
| * The first allows the password and group files to be the same |
| * physical DBM file; key=username value=password":"groupname[":"anything] |
| * |
| * mark@telescope.org, 22Sep95 |
| */ |
| |
| static apr_status_t get_dbm_grp(request_rec *r, char *key1, char *key2, |
| const char *dbmgrpfile, const char *dbtype, |
| const char ** out) |
| { |
| #if APU_MAJOR_VERSION > 1 || (APU_MAJOR_VERSION == 1 && APU_MINOR_VERSION >= 7) |
| const apr_dbm_driver_t *driver; |
| const apu_err_t *err; |
| #endif |
| char *grp_colon, *val; |
| apr_status_t retval; |
| apr_dbm_t *f; |
| |
| #if APU_MAJOR_VERSION > 1 || (APU_MAJOR_VERSION == 1 && APU_MINOR_VERSION >= 7) |
| retval = apr_dbm_get_driver(&driver, dbtype, &err, r->pool); |
| |
| if (retval != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, retval, r, APLOGNO(10286) |
| "could not load '%s' dbm library: %s", |
| err->reason, err->msg); |
| return retval; |
| } |
| |
| retval = apr_dbm_open2(&f, driver, dbmgrpfile, APR_DBM_READONLY, |
| APR_OS_DEFAULT, r->pool); |
| #else |
| retval = apr_dbm_open_ex(&f, dbtype, dbmgrpfile, APR_DBM_READONLY, |
| APR_OS_DEFAULT, r->pool); |
| #endif |
| |
| if (retval != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, retval, r, APLOGNO(01799) |
| "could not open dbm (type %s) group access " |
| "file: %s", dbtype, dbmgrpfile); |
| return retval; |
| } |
| |
| /* Try key2 only if key1 failed */ |
| if (!(val = get_dbm_entry_as_str(r->pool, f, key1))) { |
| val = get_dbm_entry_as_str(r->pool, f, key2); |
| } |
| |
| apr_dbm_close(f); |
| |
| if (val && (grp_colon = ap_strchr(val, ':')) != NULL) { |
| char *grp_colon2 = ap_strchr(++grp_colon, ':'); |
| |
| if (grp_colon2) { |
| *grp_colon2 = '\0'; |
| } |
| *out = grp_colon; |
| } |
| else { |
| *out = val; |
| } |
| |
| return retval; |
| } |
| |
| static authz_status dbmgroup_check_authorization(request_rec *r, |
| const char *require_args, |
| const void *parsed_require_args) |
| { |
| authz_dbm_config_rec *conf = ap_get_module_config(r->per_dir_config, |
| &authz_dbm_module); |
| char *user = r->user; |
| |
| const char *err = NULL; |
| const ap_expr_info_t *expr = parsed_require_args; |
| const char *require; |
| |
| const char *t; |
| char *w; |
| const char *orig_groups = NULL; |
| const char *realm = ap_auth_name(r); |
| const char *groups; |
| char *v; |
| |
| if (!user) { |
| return AUTHZ_DENIED_NO_USER; |
| } |
| |
| if (!conf->grpfile) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01798) |
| "No group file was specified in the configuration"); |
| return AUTHZ_DENIED; |
| } |
| |
| /* fetch group data from dbm file only once. */ |
| if (!orig_groups) { |
| apr_status_t status; |
| |
| status = get_dbm_grp(r, apr_pstrcat(r->pool, user, ":", realm, NULL), |
| user, conf->grpfile, conf->dbmtype, &groups); |
| |
| if (status != APR_SUCCESS) { |
| return AUTHZ_GENERAL_ERROR; |
| } |
| |
| if (groups == NULL) { |
| /* no groups available, so exit immediately */ |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01800) |
| "Authorization of user %s to access %s failed, reason: " |
| "user doesn't appear in DBM group file (%s).", |
| r->user, r->uri, conf->grpfile); |
| return AUTHZ_DENIED; |
| } |
| |
| orig_groups = groups; |
| } |
| |
| require = ap_expr_str_exec(r, expr, &err); |
| if (err) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02591) |
| "authz_dbm authorize: require dbm-group: Can't " |
| "evaluate require expression: %s", err); |
| return AUTHZ_DENIED; |
| } |
| |
| t = require; |
| while ((w = ap_getword_white(r->pool, &t)) && w[0]) { |
| groups = orig_groups; |
| while (groups[0]) { |
| v = ap_getword(r->pool, &groups, ','); |
| if (!strcmp(v, w)) { |
| return AUTHZ_GRANTED; |
| } |
| } |
| } |
| |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01801) |
| "Authorization of user %s to access %s failed, reason: " |
| "user is not part of the 'require'ed group(s).", |
| r->user, r->uri); |
| |
| return AUTHZ_DENIED; |
| } |
| |
| static APR_OPTIONAL_FN_TYPE(authz_owner_get_file_group) *authz_owner_get_file_group; |
| |
| static authz_status dbmfilegroup_check_authorization(request_rec *r, |
| const char *require_args, |
| const void *parsed_require_args) |
| { |
| authz_dbm_config_rec *conf = ap_get_module_config(r->per_dir_config, |
| &authz_dbm_module); |
| char *user = r->user; |
| const char *realm = ap_auth_name(r); |
| const char *filegroup = NULL; |
| apr_status_t status; |
| const char *groups; |
| char *v; |
| |
| if (!user) { |
| return AUTHZ_DENIED_NO_USER; |
| } |
| |
| if (!conf->grpfile) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01802) |
| "No group file was specified in the configuration"); |
| return AUTHZ_DENIED; |
| } |
| |
| /* fetch group data from dbm file. */ |
| status = get_dbm_grp(r, apr_pstrcat(r->pool, user, ":", realm, NULL), |
| user, conf->grpfile, conf->dbmtype, &groups); |
| |
| if (status != APR_SUCCESS) { |
| return AUTHZ_DENIED; |
| } |
| |
| if (groups == NULL) { |
| /* no groups available, so exit immediately */ |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01804) |
| "Authorization of user %s to access %s failed, reason: " |
| "user doesn't appear in DBM group file (%s).", |
| r->user, r->uri, conf->grpfile); |
| return AUTHZ_DENIED; |
| } |
| |
| filegroup = authz_owner_get_file_group(r); |
| |
| if (filegroup) { |
| while (groups[0]) { |
| v = ap_getword(r->pool, &groups, ','); |
| if (!strcmp(v, filegroup)) { |
| return AUTHZ_GRANTED; |
| } |
| } |
| } |
| |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01805) |
| "Authorization of user %s to access %s failed, reason: " |
| "user is not part of the 'require'ed group(s).", |
| r->user, r->uri); |
| |
| return AUTHZ_DENIED; |
| } |
| |
| static const char *dbm_parse_config(cmd_parms *cmd, const char *require_line, |
| const void **parsed_require_line) |
| { |
| const char *expr_err = NULL; |
| ap_expr_info_t *expr; |
| |
| expr = ap_expr_parse_cmd(cmd, require_line, AP_EXPR_FLAG_STRING_RESULT, |
| &expr_err, NULL); |
| |
| if (expr_err) |
| return apr_pstrcat(cmd->temp_pool, |
| "Cannot parse expression in require line: ", |
| expr_err, NULL); |
| |
| *parsed_require_line = expr; |
| |
| return NULL; |
| } |
| |
| static const authz_provider authz_dbmgroup_provider = |
| { |
| &dbmgroup_check_authorization, |
| &dbm_parse_config, |
| }; |
| |
| static const authz_provider authz_dbmfilegroup_provider = |
| { |
| &dbmfilegroup_check_authorization, |
| NULL, |
| }; |
| |
| static void authz_dbm_getfns(void) |
| { |
| authz_owner_get_file_group = APR_RETRIEVE_OPTIONAL_FN(authz_owner_get_file_group); |
| } |
| |
| static void register_hooks(apr_pool_t *p) |
| { |
| ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "dbm-group", |
| AUTHZ_PROVIDER_VERSION, |
| &authz_dbmgroup_provider, |
| AP_AUTH_INTERNAL_PER_CONF); |
| ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "dbm-file-group", |
| AUTHZ_PROVIDER_VERSION, |
| &authz_dbmfilegroup_provider, |
| AP_AUTH_INTERNAL_PER_CONF); |
| ap_hook_optional_fn_retrieve(authz_dbm_getfns, NULL, NULL, APR_HOOK_MIDDLE); |
| } |
| |
| AP_DECLARE_MODULE(authz_dbm) = |
| { |
| STANDARD20_MODULE_STUFF, |
| create_authz_dbm_dir_config, /* dir config creater */ |
| NULL, /* dir merger --- default is to override */ |
| NULL, /* server config */ |
| NULL, /* merge server config */ |
| authz_dbm_cmds, /* command apr_table_t */ |
| register_hooks /* register hooks */ |
| }; |