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/*
SSSD
IPA Backend Module -- Access control
Authors:
Sumit Bose <sbose@redhat.com>
Stephen Gallagher <sgallagh@redhat.com>
Copyright (C) 2009 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef IPA_HBAC_H_
#define IPA_HBAC_H_
#include <stdint.h>
#include <stdbool.h>
enum hbac_eval_result {
HBAC_EVAL_ERROR = -1,
HBAC_EVAL_ALLOW,
HBAC_EVAL_DENY,
HBAC_EVAL_OOM
};
#define HBAC_CATEGORY_NULL 0x0000 /* No service category specified */
#define HBAC_CATEGORY_ALL 0x0001 /* Rule should apply to all */
/* Opaque type contained in hbac_evaluator.c */
struct hbac_time_rules;
struct hbac_rule_element {
uint32_t category;
const char **names;
const char **groups;
};
struct hbac_rule {
const char *name;
bool enabled;
/* Services and service groups
* for which this rule applies
*/
struct hbac_rule_element *services;
/* Users and groups for which this
* rule applies
*/
struct hbac_rule_element *users;
/* Target hosts for which this rule apples */
struct hbac_rule_element *targethosts;
/* Source hosts for which this rule applies */
struct hbac_rule_element *srchosts;
/* For future use */
struct hbac_time_rules *timerules;
};
struct hbac_request_element {
const char *name;
const char **groups;
};
struct hbac_eval_req {
/* This is a list of service DNs to check,
* it must consist of the actual service
* requested, as well as all parent groups
* containing that service.
*/
struct hbac_request_element *service;
/* This is a list of user DNs to check,
* it must consist of the actual user
* requested, as well as all parent groups
* containing that user.
*/
struct hbac_request_element *user;
/* This is a list of target hosts to check,
* it must consist of the actual target host
* requested, as well as all parent groups
* containing that target host.
*/
struct hbac_request_element *targethost;
/* This is a list of source hosts to check,
* it must consist of the actual source host
* requested, as well as all parent groups
* containing that source host.
*/
struct hbac_request_element *srchost;
/* For future use */
time_t request_time;
};
enum hbac_error_code {
HBAC_ERROR_UNKNOWN = -1,
HBAC_SUCCESS,
HBAC_ERROR_NOT_IMPLEMENTED,
HBAC_ERROR_OUT_OF_MEMORY,
HBAC_ERROR_UNPARSEABLE_RULE
};
/* Extended information */
struct hbac_info {
/* If the hbac_eval_result was HBAC_EVAL_ERROR,
* this will be an error code.
* Otherwise it will be HBAC_SUCCESS
*/
enum hbac_error_code code;
/* Specify the name of the rule that matched or
* threw an error
*/
char *rule_name;
};
/**
* @brief Evaluate an authorization request against a set of HBAC rules
*
* @param[in] rules A NULL-terminated list of rules to evaluate against
* @param[in] hbac_req A user authorization request
* @param[out] info Extended information (including the name of the
* rule that allowed access (or caused a parse error)
* @return
*/
enum hbac_eval_result hbac_evaluate(struct hbac_rule **rules,
struct hbac_eval_req *hbac_req,
struct hbac_info **info);
const char *hbac_result_string(enum hbac_eval_result result);
const char *hbac_error_string(enum hbac_error_code code);
void hbac_free_info(struct hbac_info *info);
#define HBAC_RULE_ELEMENT_USERS 0x01
#define HBAC_RULE_ELEMENT_SERVICES 0x02
#define HBAC_RULE_ELEMENT_TARGETHOSTS 0x04
#define HBAC_RULE_ELEMENT_SOURCEHOSTS 0x08
/**
* @brief Evaluate whether an HBAC rule contains all necessary elements
*
* @param[in] rule An HBAC rule to evaluate
* @param[out] missing_attrs A list of attributes missing from the rule
* This is a bitmask that may contain one or more
* of HBAC_RULE_ELEMENT_USERS,
* HBAC_RULE_ELEMENT_SERVICES,
* HBAC_RULE_ELEMENT_TARGETHOSTS and
* HBAC_RULE_ELEMENT_SOURCEHOSTS
*
* @return True if the rule contains all mandatory attributes
*
* @note This function does not care if the rule is enabled or disabled
*/
bool hbac_rule_is_complete(struct hbac_rule *rule, uint32_t *missing_attrs);
#endif /* IPA_HBAC_H_ */
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