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/*
* Copyright (c) 2014-2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Contact: Rafal Krypa <r.krypa@samsung.com>
*
* 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
*/
/**
* @file smack-rules.h
* @author Jacek Bukarewicz <j.bukarewicz@samsung.com>
* @version 1.0
* @brief Header file of a class managing smack rules
*
*/
#pragma once
#include <vector>
#include <string>
#include <smack-exceptions.h>
struct smack_accesses;
namespace SecurityManager {
class SmackRules
{
public:
typedef std::vector<std::string> Rule;
typedef std::vector<Rule> RuleVector;
typedef std::vector<std::string> Pkgs;
typedef std::vector<std::string> Labels;
typedef std::vector<std::pair<std::string, std::vector<std::string>>> PkgsApps;
SmackRules();
virtual ~SmackRules();
void add(const std::string &subject, const std::string &object,
const std::string &permissions);
void addModify(const std::string &subject, const std::string &object,
const std::string &allowPermissions, const std::string &denyPermissions);
void addFromTemplate(
const RuleVector &templateRules,
const std::string &appProcessLabel,
const std::string &pkgName,
const int authorId);
void addFromTemplateFile(
const std::string &templatePath,
const std::string &appProcessLabel,
const std::string &pkgName,
const int authorId);
void apply() const;
void clear() const;
/**
* Create cross dependencies for all applications in a package
*
* This is needed for all applications within a package to have
* correct permissions to shared data.
*
* @param[in] pkgLabels - a list of process labels of all applications inside this package
*/
void generatePackageCrossDeps(const Labels &pkgLabels);
/**
* Install package-specific smack rules plus add rules for specified external apps.
*
* Function creates smack rules using predefined template. Rules are applied
* to the kernel.
*
* @param[in] appProcessLabel - process label of the application
* @param[in] pkgName - package identifier
* @param[in] authorId - author id of application
* @param[in] pkgLabels - a list of process labels of all applications inside this package
*/
static void installApplicationRules(
const std::string &appProcessLabel,
const std::string &pkgName,
const int authorId,
const Labels &pkgLabels);
/**
* Uninstall package-specific smack rules.
*
* Function loads package-specific smack rules, revokes them from the kernel.
*
* @param[in] pkgName - package identifier
* @param[in] pkgLabels - a list of process labels of all applications inside this package
*/
static void uninstallPackageRules(const std::string &pkgName, const Labels &pkgLabels);
/**
* Uninstall application-specific smack rules.
*
* Function removes application specific rules from the kernel.
*
* @param[in] appProcessLabel - application process label
* @param[in] pkgName - package identifier that the application is in
* @param[in] authorId - identification (datbase key) of the author
*/
static void uninstallApplicationRules(const std::string &appProcessLabel, const std::string &pkgName, const int authorId);
/**
* Update package specific rules
*
* This function regenerates all package rules that
* need to exist currently for all application in that
* package
*
* @param[in] pkgName - package identifier that the application is in
* @param[in] pkgContents - list of all applications in the package
*/
static void updatePackageRules(
const std::string &pkgName,
const std::vector<std::string> &pkgContents);
/**
* Uninstall author-specific smack rules.
*
* param[in] authorId - identification (datbase key) of the author
*/
static void uninstallAuthorRules(const int authorId);
/**
* Add rules related to private path sharing rules
*
* This function generates and applies rules needed to apply private sharing.
* If isPathSharedAlready, no rule for owner, User or System to path label will be applied.
* If isTargetSharingAlready, no rule for directory traversing is set for target.
*
* @param[in] ownerPkgName - package identifier of path owner
* @param[in] ownerPkgLabels - vector of process labels of applications contained in package
* which owner application belongs to
* @param[in] targetAppLabel - process label of the target application
* @param[in] pathLabel - a list of all applications in the package
* @param[in] isPathSharedAlready - flag indicated, if path has been shared before
* @param[in] isTargetSharingAlready - flag indicated, if target is already sharing anything
* with owner
*/
static void applyPrivateSharingRules(const std::string &ownerPkgName,
const SmackRules::Labels &ownerPkgLabels,
const std::string &targetAppLabel,
const std::string &pathLabel,
bool isPathSharedAlready,
bool isTargetSharingAlready);
/**
* Remove rules related to private path sharing rules
*
* This function generates and applies rules needed to apply private sharing.
* If isPathSharedNoMore, rules for owner package contents, User or System to path label will
* be removed.
* If isTargetSharingNoMore, rule for directory traversing is removed for target.
*
* @param[in] ownerPkgName - package identifier of path owner
* @param[in] ownerPkgLabels - vector of process labels of applications contained in package
* which owner application belongs to
* @param[in] targetAppLabel - process label of the target application
* @param[in] pathLabel - a list of all applications in the package
* @param[in] isPathSharedNoMore - flag indicated, if path is not shared anymore
* @param[in] isTargetSharingNoMore - flag indicated, if target is not sharing anything
* with owner
*/
static void dropPrivateSharingRules(const std::string &ownerPkgName,
const Labels &ownerPkgLabels,
const std::string &targetAppLabel,
const std::string &pathLabel,
bool isPathSharedNoMore,
bool isTargetSharingNoMore);
private:
static void useTemplate(
const std::string &templatePath,
const std::string &appProcessLabel,
const std::string &pkgName,
const int authorId = -1);
/**
* Helper method: replace all occurrences of \ref needle in \ref haystack
* with \ref replace.
*
* @param[in,out] haystack string to modify
* @param needle string to find in \ref haystack
* @param replace string to replace \ref needle with
*/
static void strReplace(std::string &haystack, const std::string &needle,
const std::string &replace);
smack_accesses *m_handle;
/**
* Revoke rules for which label of given \ref appName is a subject.
*
* @param[in] appProcessLabel = application process label
*/
static void revokeAppSubject(const std::string &appProcessLabel);
};
} // namespace SecurityManager
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