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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 <internal/internal.h>
#include <string>
#define MAX_LOG_LINE 1024
#define MAX_CHILDREN 65
namespace ldp_xml_parser
{
const char char_map[128] {65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 10, 12, 65,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 65, 65, 65, 65, 65, 65,
65, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53,
54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 65, 65, 65, 11,
65, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 65, 65, 65, 65, 65};
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 DecisionItem {
private:
Decision __decision;
const char* __privilege;
public:
friend class ItemBuilder;
DecisionItem(Decision decision = Decision::ANY, const char* privilege = NULL);
~DecisionItem();
Decision getDecision() const;
const char* getPrivilege() const;
ItemType getType() const;
const char* toString(char* str) const;
};
class ItemOwn {
private:
DecisionItem __decision;
const char* __name;
bool __is_prefix;
public:
friend class ItemBuilder;
ItemOwn(const char* name = NULL,
Decision decision = Decision::ANY,
const char* privilege = NULL);
bool match(const char* const name) const;
ItemType getType() const;
const char* toString(char* str) const;
const DecisionItem& getDecision() const;
const char* getName() const;
bool isPrefix() const;
};
struct TreeNode{
DecisionItem __decisionItem;
char __nameChar;
bool __is_prefix;
struct TreeNode *children[MAX_CHILDREN];
};
struct NameSR {
const char* name;
int len;
NameSR(const char* m = NULL, int l = 0);
};
struct MatchItemSR {
int names_num;
NameSR names[KDBUS_CONN_MAX_NAMES+1];
const char* interface;
const char* member;
const char* path;
MessageType type;
MessageDirection direction;
MatchItemSR(const char* i = NULL, const char* me = NULL, const char* p = NULL, MessageType t = MessageType::ANY, MessageDirection d = MessageDirection::ANY);
~MatchItemSR();
void addName(const char* name);
bool addNames(const char* name);
const char* toString(char* str) const;
};
class ItemSendReceive {
private:
DecisionItem __decision;
NameSR __name;
const char* __interface;
const char* __member;
const char* __path;
MessageType __type;
MessageDirection __direction;
public:
friend class ItemBuilder;
ItemSendReceive(const char* name = 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);
~ItemSendReceive();
bool match(const MatchItemSR& item) const;
MessageDirection getDirection() const;
ItemType getType() const;
const char* toString(char* str) const;
const DecisionItem& getDecision() const;
};
class NaivePolicyDb;
class ItemBuilder {
private:
DecisionItem __decision;
ItemOwn __current_own;
ItemType __current_item_type;
ItemSendReceive* __current_sr;
ItemOwn* getOwnItem();
ItemSendReceive* getSendReceiveItem();
char* duplicate(const char* str);
public:
ItemBuilder();
~ItemBuilder();
void generateItem(NaivePolicyDb& db, PolicyType& policy_type, PolicyTypeValue& policy_type_value);
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 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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