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/* 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 "ap_provider.h"
#include "httpd.h"
#include "http_config.h"
#include "http_log.h"
#include "apr_dbd.h"
#include "mod_dbd.h"
#include "apr_strings.h"
#include "mod_auth.h"
#include "apr_md5.h"
module AP_MODULE_DECLARE_DATA authn_dbd_module;
typedef struct {
const char *user;
const char *realm;
} authn_dbd_conf;
typedef struct {
const char *label;
const char *query;
} authn_dbd_rec;
/* optional function - look it up once in post_config */
static ap_dbd_t *(*authn_dbd_acquire_fn)(request_rec*) = NULL;
static void (*authn_dbd_prepare_fn)(server_rec*, const char*, const char*) = NULL;
static void *authn_dbd_cr_conf(apr_pool_t *pool, char *dummy)
{
authn_dbd_conf *ret = apr_pcalloc(pool, sizeof(authn_dbd_conf));
return ret;
}
static void *authn_dbd_merge_conf(apr_pool_t *pool, void *BASE, void *ADD)
{
authn_dbd_conf *add = ADD;
authn_dbd_conf *base = BASE;
authn_dbd_conf *ret = apr_palloc(pool, sizeof(authn_dbd_conf));
ret->user = (add->user == NULL) ? base->user : add->user;
ret->realm = (add->realm == NULL) ? base->realm : add->realm;
return ret;
}
static const char *authn_dbd_prepare(cmd_parms *cmd, void *cfg, const char *query)
{
static unsigned int label_num = 0;
char *label;
if (authn_dbd_prepare_fn == NULL) {
authn_dbd_prepare_fn = APR_RETRIEVE_OPTIONAL_FN(ap_dbd_prepare);
if (authn_dbd_prepare_fn == NULL) {
return "You must load mod_dbd to enable AuthDBD functions";
}
authn_dbd_acquire_fn = APR_RETRIEVE_OPTIONAL_FN(ap_dbd_acquire);
}
label = apr_psprintf(cmd->pool, "authn_dbd_%d", ++label_num);
authn_dbd_prepare_fn(cmd->server, query, label);
/* save the label here for our own use */
return ap_set_string_slot(cmd, cfg, label);
}
static const command_rec authn_dbd_cmds[] =
{
AP_INIT_TAKE1("AuthDBDUserPWQuery", authn_dbd_prepare,
(void *)APR_OFFSETOF(authn_dbd_conf, user), ACCESS_CONF,
"Query used to fetch password for user"),
AP_INIT_TAKE1("AuthDBDUserRealmQuery", authn_dbd_prepare,
(void *)APR_OFFSETOF(authn_dbd_conf, realm), ACCESS_CONF,
"Query used to fetch password for user+realm"),
{NULL}
};
static authn_status authn_dbd_password(request_rec *r, const char *user,
const char *password)
{
apr_status_t rv;
const char *dbd_password = NULL;
apr_dbd_prepared_t *statement;
apr_dbd_results_t *res = NULL;
apr_dbd_row_t *row = NULL;
authn_dbd_conf *conf = ap_get_module_config(r->per_dir_config,
&authn_dbd_module);
ap_dbd_t *dbd = authn_dbd_acquire_fn(r);
if (dbd == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Error looking up %s in database", user);
return AUTH_GENERAL_ERROR;
}
if (conf->user == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "No DBD Authn configured!");
return AUTH_GENERAL_ERROR;
}
statement = apr_hash_get(dbd->prepared, conf->user, APR_HASH_KEY_STRING);
if (statement == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "No DBD Authn configured!");
return AUTH_GENERAL_ERROR;
}
if (apr_dbd_pvselect(dbd->driver, r->pool, dbd->handle, &res, statement,
0, user, NULL) != 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Error looking up %s in database", user);
return AUTH_GENERAL_ERROR;
}
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) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"Error looking up %s in database", user);
return AUTH_GENERAL_ERROR;
}
if (dbd_password == NULL) {
dbd_password = apr_dbd_get_entry(dbd->driver, row, 0);
}
/* we can't break out here or row won't get cleaned up */
}
if (!dbd_password) {
return AUTH_USER_NOT_FOUND;
}
rv = apr_password_validate(password, dbd_password);
if (rv != APR_SUCCESS) {
return AUTH_DENIED;
}
return AUTH_GRANTED;
}
static authn_status authn_dbd_realm(request_rec *r, const char *user,
const char *realm, char **rethash)
{
apr_status_t rv;
const char *dbd_hash = NULL;
apr_dbd_prepared_t *statement;
apr_dbd_results_t *res = NULL;
apr_dbd_row_t *row = NULL;
authn_dbd_conf *conf = ap_get_module_config(r->per_dir_config,
&authn_dbd_module);
ap_dbd_t *dbd = authn_dbd_acquire_fn(r);
if (dbd == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Error looking up %s in database", user);
return AUTH_GENERAL_ERROR;
}
if (conf->realm == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "No DBD Authn configured!");
return AUTH_GENERAL_ERROR;
}
statement = apr_hash_get(dbd->prepared, conf->realm, APR_HASH_KEY_STRING);
if (statement == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "No DBD Authn configured!");
return AUTH_GENERAL_ERROR;
}
if (apr_dbd_pvselect(dbd->driver, r->pool, dbd->handle, &res, statement,
0, user, realm, NULL) != 0) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Error looking up %s:%s in database", user, realm);
return AUTH_GENERAL_ERROR;
}
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) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"Error looking up %s in database", user);
return AUTH_GENERAL_ERROR;
}
if (dbd_hash == NULL) {
dbd_hash = apr_dbd_get_entry(dbd->driver, row, 0);
}
/* we can't break out here or row won't get cleaned up */
}
if (!dbd_hash) {
return AUTH_USER_NOT_FOUND;
}
*rethash = apr_pstrdup(r->pool, dbd_hash);
return AUTH_USER_FOUND;
}
static void authn_dbd_hooks(apr_pool_t *p)
{
static const authn_provider authn_dbd_provider = {
&authn_dbd_password,
&authn_dbd_realm
};
ap_register_provider(p, AUTHN_PROVIDER_GROUP, "dbd", "0", &authn_dbd_provider);
}
module AP_MODULE_DECLARE_DATA authn_dbd_module =
{
STANDARD20_MODULE_STUFF,
authn_dbd_cr_conf,
authn_dbd_merge_conf,
NULL,
NULL,
authn_dbd_cmds,
authn_dbd_hooks
};
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