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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.
*/
/**
* @file mod_auth.h
* @brief Authentication and Authorization Extension for Apache
*
* @defgroup MOD_AUTH mod_auth
* @ingroup APACHE_MODS
*/
#ifndef APACHE_MOD_AUTH_H
#define APACHE_MOD_AUTH_H
#include "apr_pools.h"
#include "apr_hash.h"
#include "apr_optional.h"
#include "httpd.h"
#include "http_config.h"
#ifdef __cplusplus
extern "C" {
#endif
#define AUTHN_PROVIDER_GROUP "authn"
#define AUTHZ_PROVIDER_GROUP "authz"
#define AUTHN_PROVIDER_VERSION "0"
#define AUTHZ_PROVIDER_VERSION "0"
#define AUTHN_DEFAULT_PROVIDER "file"
#define AUTHN_PROVIDER_NAME_NOTE "authn_provider_name"
#define AUTHZ_PROVIDER_NAME_NOTE "authz_provider_name"
#define AUTHN_PREFIX "AUTHENTICATE_"
#define AUTHZ_PREFIX "AUTHORIZE_"
/** all of the requirements must be met */
#ifndef SATISFY_ALL
#define SATISFY_ALL 0
#endif
/** any of the requirements must be met */
#ifndef SATISFY_ANY
#define SATISFY_ANY 1
#endif
/** There are no applicable satisfy lines */
#ifndef SATISFY_NOSPEC
#define SATISFY_NOSPEC 2
#endif
typedef enum {
AUTH_DENIED,
AUTH_GRANTED,
AUTH_USER_FOUND,
AUTH_USER_NOT_FOUND,
AUTH_GENERAL_ERROR
} authn_status;
typedef enum {
AUTHZ_DENIED,
AUTHZ_GRANTED,
AUTHZ_NEUTRAL,
AUTHZ_GENERAL_ERROR,
AUTHZ_DENIED_NO_USER /* denied because r->user == NULL */
} authz_status;
typedef struct {
/* Given a username and password, expected to return AUTH_GRANTED
* if we can validate this user/password combination.
*/
authn_status (*check_password)(request_rec *r, const char *user,
const char *password);
/* Given a user and realm, expected to return AUTH_USER_FOUND if we
* can find a md5 hash of 'user:realm:password'
*/
authn_status (*get_realm_hash)(request_rec *r, const char *user,
const char *realm, char **rethash);
} authn_provider;
/* A linked-list of authn providers. */
typedef struct authn_provider_list authn_provider_list;
struct authn_provider_list {
const char *provider_name;
const authn_provider *provider;
authn_provider_list *next;
};
typedef struct {
/* Given a request_rec, expected to return AUTHZ_GRANTED
* if we can authorize user access.
* @param r the request record
* @param require_line the argument to the authz provider
* @param parsed_require_line the value set by parse_require_line(), if any
*/
authz_status (*check_authorization)(request_rec *r,
const char *require_line,
const void *parsed_require_line);
/** Check the syntax of a require line and optionally cache the parsed
* line. This function may be NULL.
* @param cmd the config directive
* @param require_line the argument to the authz provider
* @param parsed_require_line place to store parsed require_line for use by provider
* @return Error message or NULL on success
*/
const char *(*parse_require_line)(cmd_parms *cmd, const char *require_line,
const void **parsed_require_line);
} authz_provider;
/* ap_authn_cache_store: Optional function for authn providers
* to enable caching their lookups with mod_authn_cache
* @param r The request rec
* @param module Module identifier
* @param user User name to authenticate
* @param realm Digest authn realm (NULL for basic authn)
* @param data The value looked up by the authn provider, to cache
*/
APR_DECLARE_OPTIONAL_FN(void, ap_authn_cache_store,
(request_rec*, const char*, const char*,
const char*, const char*));
#ifdef __cplusplus
}
#endif
#endif
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