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-rw-r--r--modules/aaa/mod_authz_dbd.c409
1 files changed, 409 insertions, 0 deletions
diff --git a/modules/aaa/mod_authz_dbd.c b/modules/aaa/mod_authz_dbd.c
new file mode 100644
index 0000000..e1bb623
--- /dev/null
+++ b/modules/aaa/mod_authz_dbd.c
@@ -0,0 +1,409 @@
+/* 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;
+ 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;
+ }
+
+ dbd = dbd_handle(r);
+ 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;
+ 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;
+ }
+
+ dbd = dbd_handle(r);
+ 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
+};
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