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/*
* Copyright (c) 2015 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 check-proper-drop.h
* @author Rafal Krypa <r.krypa@samsung.com>
* @version 1.0
* @brief Definition of proper privilege dropping check utilities
*/
#ifndef SECURITY_MANAGER_CHECK_PROPER_DROP_
#define SECURITY_MANAGER_CHECK_PROPER_DROP_
#include <dpl/exception.h>
#include <unistd.h>
#include <proc/readproc.h>
#include <vector>
namespace SecurityManager {
class CheckProperDrop {
public:
class Exception {
public:
DECLARE_EXCEPTION_TYPE(SecurityManager::Exception, Base)
DECLARE_EXCEPTION_TYPE(Base, ProcError)
DECLARE_EXCEPTION_TYPE(Base, CapError)
};
~CheckProperDrop();
CheckProperDrop(pid_t pid = getpid()) : m_pid(pid) {};
/**
* Fetch credentials of the process and all its threads.
* Must be called before checkThreads().
*/
void getThreads();
/**
* Check whether all threads of the process has properly aligned
* credentials:
* - uids
* - gids
* - capabilities
* - Smack labels
*
* It will terminate the calling process if any thread has different
* value than the other threads. This prevents security risks associated
* with improperly dropped privileges during application launch.
*/
bool checkThreads();
private:
pid_t m_pid;
proc_t *m_proc = nullptr;
std::vector<proc_t*> m_threads;
};
} // namespace SecurityManager
#endif /* SECURITY_MANAGER_CHECK_PROPER_DROP_H_ */
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