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/*
* Copyright (c) 2015 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed 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.
*/
#ifndef _POLICY_H
#define _POLICY_H
#include <boost/tokenizer.hpp>
#include <boost/property_tree/ptree.hpp>
#include <string>
#define MAX_LOG_LINE 1024
namespace ldp_xml_parser
{
enum class MessageType : uint8_t {
ANY = 0,
METHOD_CALL,
METHOD_RETURN,
ERROR,
SIGNAL
};
enum class MessageDirection : uint8_t {
ANY,
SEND,
RECEIVE
};
enum class ItemType : uint8_t{
GENERIC,
OWN,
SEND,
RECEIVE
};
enum class PolicyType : uint8_t {
CONTEXT,
USER,
GROUP
};
enum class ContextType : uint8_t {
DEFAULT,
MANDATORY,
MAX
};
enum class Decision : uint8_t {
ANY,
ALLOW,
DENY,
CHECK
};
enum class DecisionResult : int8_t {
CYNARA_ERROR = -3,
DENY = 0,
ALLOW
};
union PolicyTypeValue {
PolicyTypeValue();
PolicyTypeValue(ContextType type);
PolicyTypeValue(uid_t us);
ContextType context;
uid_t user;
gid_t group;
};
class ItemBuilder;
class Item {
protected:
Decision _decision;
const char* _privilege;
bool _is_owner;
public:
friend class ItemBuilder;
Item(Decision decision = Decision::ANY, const char* privilege = NULL, bool isOwner = false);
virtual ~Item();
virtual bool match(const Item& item) const;
virtual bool match(const Item* item) const;
virtual Decision getDecision() const;
virtual const char* getPrivilege() const;
virtual ItemType getType() const;
virtual const char* toString(char* str) const;
};
class ItemOwn : public Item {
private:
const char* __name;
bool __is_prefix;
public:
friend class ItemBuilder;
ItemOwn(const char* name = NULL,
bool is_prefix = false,
Decision decision = Decision::ANY,
const char* privilege = NULL);
virtual ~ItemOwn();
virtual bool match(const Item* item) const;
virtual ItemType getType() const;
virtual const char* toString(char* str) const;
};
class ItemSendReceive : public Item {
const char** __names;
const char* __interface;
const char* __member;
const char* __path;
MessageType __type;
MessageDirection __direction;
public:
friend class ItemBuilder;
ItemSendReceive(const char** names = NULL,
const char* interface = NULL,
const char* member = NULL,
const char* path = NULL,
MessageType type = MessageType::ANY,
MessageDirection direction = MessageDirection::ANY,
Decision decision = Decision::ANY,
const char* privilege = NULL);
virtual ~ItemSendReceive();
virtual bool match(const Item* item) const;
MessageDirection getDirection() const;
virtual ItemType getType() const;
virtual const char* toString(char* str) const;
};
class ItemBuilder {
private:
Item* __current;
Decision __delayed_decision;
const char* __delayed_privilege;
ItemOwn* getOwnItem();
ItemSendReceive* getSendReceiveItem();
char* duplicate(const char* str);
void prepareItem();
public:
ItemBuilder();
~ItemBuilder();
Item* generateItem();
void reset();
void addUser(const char* name);
void addGroup(const char* name);
void addOwner(const char* owner);
void addName(const char* name);
void addInterface(const char* interface);
void addMember(const char* member);
void addPath(const char* path);
void addMessageType(MessageType type);
void addDirection(MessageDirection direction);
void addPrivilege(const char* privilege);
void addDecision(Decision decision);
void setPrefix(bool value);
};
class NaivePolicyDb;
class DbAdapter {
private:
enum state {
NONE,
POLICY,
ALLOW_DENY_CHECK
};
NaivePolicyDb& __system_db;
NaivePolicyDb& __session_db;
bool __attr;
state __tag_state;
ItemBuilder __builder;
void updateDecision(const boost::property_tree::ptree::value_type& v,
PolicyType& policy_type,
PolicyTypeValue& policy_type_value,
state& tag,
bool& attr);
void xmlTraversal(bool bus,
const boost::property_tree::ptree& pt,
state tag,
PolicyType& policy_type,
PolicyTypeValue& policy_type_value,
bool attr = false,
int level = 0);
public:
DbAdapter(NaivePolicyDb& system, NaivePolicyDb& session);
void updateDb(bool bus, boost::property_tree::ptree& xmlTree, std::vector<std::string>& incl_dirs);
static uid_t convertToUid(const char* user);
static gid_t convertToGid(const char* group);
};
}
#endif
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