| /* 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_log.h" |
| #include "http_config.h" |
| #include "ap_provider.h" |
| #include "http_request.h" |
| #include "http_protocol.h" |
| #include "http_core.h" |
| #include "apr_dbd.h" |
| #include "mod_dbd.h" |
| #include "apr_strings.h" |
| #include "mod_authz_dbd.h" |
| |
| #include "mod_auth.h" |
| |
| |
| module AP_MODULE_DECLARE_DATA authz_dbd_module; |
| |
| /* Export a hook for modules that manage clientside sessions |
| * (e.g. mod_auth_cookie) |
| * to deal with those when we successfully login/logout at the server |
| * |
| * XXX: WHY would this be specific to dbd_authz? Why wouldn't we track |
| * this across all authz user providers in a lower level mod, such as |
| * mod_auth_basic/digest? |
| */ |
| APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(authz_dbd, AUTHZ_DBD, int, client_login, |
| (request_rec *r, int code, const char *action), |
| (r, code, action), OK, DECLINED) |
| |
| |
| typedef struct { |
| const char *query; |
| const char *redir_query; |
| int redirect; |
| } authz_dbd_cfg ; |
| |
| static ap_dbd_t *(*dbd_handle)(request_rec*) = NULL; |
| static void (*dbd_prepare)(server_rec*, const char*, const char*) = NULL; |
| |
| static const char *const noerror = "???"; |
| |
| static void *authz_dbd_cr_cfg(apr_pool_t *pool, char *dummy) |
| { |
| authz_dbd_cfg *ret = apr_pcalloc(pool, sizeof(authz_dbd_cfg)); |
| ret->redirect = -1; |
| return ret; |
| } |
| |
| static void *authz_dbd_merge_cfg(apr_pool_t *pool, void *BASE, void *ADD) |
| { |
| authz_dbd_cfg *base = BASE; |
| authz_dbd_cfg *add = ADD; |
| authz_dbd_cfg *ret = apr_palloc(pool, sizeof(authz_dbd_cfg)); |
| |
| ret->query = (add->query == NULL) ? base->query : add->query; |
| ret->redir_query = (add->redir_query == NULL) |
| ? base->redir_query : add->redir_query; |
| ret->redirect = (add->redirect == -1) ? base->redirect : add->redirect; |
| return ret; |
| } |
| |
| static const char *authz_dbd_prepare(cmd_parms *cmd, void *cfg, |
| const char *query) |
| { |
| static unsigned int label_num = 0; |
| char *label; |
| const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS); |
| if (err) |
| return err; |
| |
| if (dbd_prepare == NULL) { |
| dbd_prepare = APR_RETRIEVE_OPTIONAL_FN(ap_dbd_prepare); |
| if (dbd_prepare == NULL) { |
| return "You must load mod_dbd to enable AuthzDBD functions"; |
| } |
| dbd_handle = APR_RETRIEVE_OPTIONAL_FN(ap_dbd_acquire); |
| } |
| label = apr_psprintf(cmd->pool, "authz_dbd_%d", ++label_num); |
| |
| dbd_prepare(cmd->server, query, label); |
| |
| /* save the label here for our own use */ |
| return ap_set_string_slot(cmd, cfg, label); |
| } |
| |
| static const command_rec authz_dbd_cmds[] = { |
| AP_INIT_FLAG("AuthzDBDLoginToReferer", ap_set_flag_slot, |
| (void*)APR_OFFSETOF(authz_dbd_cfg, redirect), ACCESS_CONF, |
| "Whether to redirect to referer on successful login"), |
| AP_INIT_TAKE1("AuthzDBDQuery", authz_dbd_prepare, |
| (void*)APR_OFFSETOF(authz_dbd_cfg, query), ACCESS_CONF, |
| "SQL query for DBD Authz or login"), |
| AP_INIT_TAKE1("AuthzDBDRedirectQuery", authz_dbd_prepare, |
| (void*)APR_OFFSETOF(authz_dbd_cfg, redir_query), ACCESS_CONF, |
| "SQL query to get per-user redirect URL after login"), |
| {NULL} |
| }; |
| |
| static int authz_dbd_login(request_rec *r, authz_dbd_cfg *cfg, |
| const char *action) |
| { |
| int rv; |
| const char *newuri = NULL; |
| int nrows; |
| const char *message; |
| ap_dbd_t *dbd = dbd_handle(r); |
| apr_dbd_prepared_t *query; |
| apr_dbd_results_t *res = NULL; |
| apr_dbd_row_t *row = NULL; |
| |
| if (cfg->query == NULL) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01642) |
| "No query configured for %s!", action); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| if (dbd == NULL) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02902) |
| "No db handle available for %s! " |
| "Check your database access", |
| action); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| query = apr_hash_get(dbd->prepared, cfg->query, APR_HASH_KEY_STRING); |
| if (query == NULL) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01643) |
| "Error retrieving Query for %s!", action); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| rv = apr_dbd_pvquery(dbd->driver, r->pool, dbd->handle, &nrows, |
| query, r->user, NULL); |
| if (rv == 0) { |
| if (nrows != 1) { |
| ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01644) |
| "authz_dbd: %s of user %s updated %d rows", |
| action, r->user, nrows); |
| } |
| } |
| else { |
| message = apr_dbd_error(dbd->driver, dbd->handle, rv); |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01645) |
| "authz_dbd: query for %s failed; user %s [%s]", |
| action, r->user, message?message:noerror); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| if (cfg->redirect == 1) { |
| newuri = apr_table_get(r->headers_in, "Referer"); |
| } |
| |
| if (!newuri && cfg->redir_query) { |
| query = apr_hash_get(dbd->prepared, cfg->redir_query, |
| APR_HASH_KEY_STRING); |
| if (query == NULL) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01646) |
| "authz_dbd: no redirect query!"); |
| /* OK, this is non-critical; we can just not-redirect */ |
| } |
| else if ((rv = apr_dbd_pvselect(dbd->driver, r->pool, dbd->handle, |
| &res, query, 0, r->user, NULL)) == 0) { |
| for (rv = apr_dbd_get_row(dbd->driver, r->pool, res, &row, -1); |
| rv != -1; |
| rv = apr_dbd_get_row(dbd->driver, r->pool, res, &row, -1)) { |
| if (rv != 0) { |
| message = apr_dbd_error(dbd->driver, dbd->handle, rv); |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01647) |
| "authz_dbd in get_row; action=%s user=%s [%s]", |
| action, r->user, message?message:noerror); |
| } |
| else if (newuri == NULL) { |
| newuri = |
| apr_pstrdup(r->pool, |
| apr_dbd_get_entry(dbd->driver, row, 0)); |
| } |
| /* we can't break out here or row won't get cleaned up */ |
| } |
| } |
| else { |
| message = apr_dbd_error(dbd->driver, dbd->handle, rv); |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01648) |
| "authz_dbd/redirect for %s of %s [%s]", |
| action, r->user, message?message:noerror); |
| } |
| } |
| if (newuri != NULL) { |
| r->status = HTTP_MOVED_TEMPORARILY; |
| apr_table_set(r->err_headers_out, "Location", newuri); |
| } |
| authz_dbd_run_client_login(r, OK, action); |
| return OK; |
| } |
| |
| static int authz_dbd_group_query(request_rec *r, authz_dbd_cfg *cfg, |
| apr_array_header_t *groups) |
| { |
| /* SELECT group FROM authz WHERE user = %s */ |
| int rv; |
| const char *message; |
| ap_dbd_t *dbd = dbd_handle(r); |
| apr_dbd_prepared_t *query; |
| apr_dbd_results_t *res = NULL; |
| apr_dbd_row_t *row = NULL; |
| |
| if (cfg->query == NULL) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01649) |
| "No query configured for dbd-group!"); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| if (dbd == NULL) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02903) |
| "No db handle available for dbd-query! " |
| "Check your database access"); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| query = apr_hash_get(dbd->prepared, cfg->query, APR_HASH_KEY_STRING); |
| if (query == NULL) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01650) |
| "Error retrieving query for dbd-group!"); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| rv = apr_dbd_pvselect(dbd->driver, r->pool, dbd->handle, &res, |
| query, 0, r->user, NULL); |
| if (rv == 0) { |
| for (rv = apr_dbd_get_row(dbd->driver, r->pool, res, &row, -1); |
| rv != -1; |
| rv = apr_dbd_get_row(dbd->driver, r->pool, res, &row, -1)) { |
| if (rv == 0) { |
| APR_ARRAY_PUSH(groups, const char *) = |
| apr_pstrdup(r->pool, |
| apr_dbd_get_entry(dbd->driver, row, 0)); |
| } |
| else { |
| message = apr_dbd_error(dbd->driver, dbd->handle, rv); |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01651) |
| "authz_dbd in get_row; group query for user=%s [%s]", |
| r->user, message?message:noerror); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| } |
| } |
| else { |
| message = apr_dbd_error(dbd->driver, dbd->handle, rv); |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01652) |
| "authz_dbd, in groups query for %s [%s]", |
| r->user, message?message:noerror); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| return OK; |
| } |
| |
| static authz_status dbdgroup_check_authorization(request_rec *r, |
| const char *require_args, |
| const void *parsed_require_args) |
| { |
| int rv; |
| const char *w; |
| apr_array_header_t *groups; |
| |
| const char *err = NULL; |
| const ap_expr_info_t *expr = parsed_require_args; |
| const char *require; |
| |
| const char *t; |
| authz_dbd_cfg *cfg = ap_get_module_config(r->per_dir_config, |
| &authz_dbd_module); |
| |
| if (!r->user) { |
| return AUTHZ_DENIED_NO_USER; |
| } |
| |
| groups = apr_array_make(r->pool, 4, sizeof(const char*)); |
| rv = authz_dbd_group_query(r, cfg, groups); |
| if (rv != OK) { |
| return AUTHZ_GENERAL_ERROR; |
| } |
| |
| require = ap_expr_str_exec(r, expr, &err); |
| if (err) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02590) |
| "authz_dbd authorize: require dbd-group: Can't " |
| "evaluate require expression: %s", err); |
| return AUTHZ_DENIED; |
| } |
| |
| t = require; |
| while (t[0]) { |
| w = ap_getword_white(r->pool, &t); |
| if (ap_array_str_contains(groups, w)) { |
| return AUTHZ_GRANTED; |
| } |
| } |
| |
| return AUTHZ_DENIED; |
| } |
| |
| static authz_status dbdlogin_check_authorization(request_rec *r, |
| const char *require_args, |
| const void *parsed_require_args) |
| { |
| authz_dbd_cfg *cfg = ap_get_module_config(r->per_dir_config, |
| &authz_dbd_module); |
| |
| if (!r->user) { |
| return AUTHZ_DENIED_NO_USER; |
| } |
| |
| return (authz_dbd_login(r, cfg, "login") == OK ? AUTHZ_GRANTED : AUTHZ_DENIED); |
| } |
| |
| static authz_status dbdlogout_check_authorization(request_rec *r, |
| const char *require_args, |
| const void *parsed_require_args) |
| { |
| authz_dbd_cfg *cfg = ap_get_module_config(r->per_dir_config, |
| &authz_dbd_module); |
| |
| if (!r->user) { |
| return AUTHZ_DENIED_NO_USER; |
| } |
| |
| return (authz_dbd_login(r, cfg, "logout") == OK ? AUTHZ_GRANTED : AUTHZ_DENIED); |
| } |
| |
| static const char *dbd_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_dbdgroup_provider = |
| { |
| &dbdgroup_check_authorization, |
| &dbd_parse_config, |
| }; |
| |
| static const authz_provider authz_dbdlogin_provider = |
| { |
| &dbdlogin_check_authorization, |
| NULL, |
| }; |
| |
| static const authz_provider authz_dbdlogout_provider = |
| { |
| &dbdlogout_check_authorization, |
| NULL, |
| }; |
| |
| static void authz_dbd_hooks(apr_pool_t *p) |
| { |
| ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "dbd-group", |
| AUTHZ_PROVIDER_VERSION, |
| &authz_dbdgroup_provider, |
| AP_AUTH_INTERNAL_PER_CONF); |
| ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "dbd-login", |
| AUTHZ_PROVIDER_VERSION, |
| &authz_dbdlogin_provider, |
| AP_AUTH_INTERNAL_PER_CONF); |
| ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "dbd-logout", |
| AUTHZ_PROVIDER_VERSION, |
| &authz_dbdlogout_provider, |
| AP_AUTH_INTERNAL_PER_CONF); |
| } |
| |
| AP_DECLARE_MODULE(authz_dbd) = |
| { |
| STANDARD20_MODULE_STUFF, |
| authz_dbd_cr_cfg, |
| authz_dbd_merge_cfg, |
| NULL, |
| NULL, |
| authz_dbd_cmds, |
| authz_dbd_hooks |
| }; |
