/*
 * Copyright (c) 2010 SURFnet bv
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*****************************************************************************
 SessionObjectStore.cpp

 The token class; a token is stored in a directory containing several files.
 Each object is stored in a separate file and a token object is present that
 has the token specific attributes
 *****************************************************************************/

#include "config.h"
#include "log.h"
#include "OSAttributes.h"
#include "OSAttribute.h"
#include "SessionObject.h"
#include "cryptoki.h"
#include "SessionObjectStore.h"
#include <vector>
#include <string>
#include <set>
#include <map>
#include <list>

// Constructor
SessionObjectStore::SessionObjectStore()
{
	storeMutex = MutexFactory::i()->getMutex();
}

// Destructor
SessionObjectStore::~SessionObjectStore()
{
	// Clean up
	objects.clear();
	std::set<SessionObject*> cleanUp = allObjects;
	allObjects.clear();

	for (std::set<SessionObject*>::iterator i = cleanUp.begin(); i != cleanUp.end(); i++)
	{
		if ((*i) == NULL) continue;

		SessionObject* that = *i;
		delete that;
	}

	MutexFactory::i()->recycleMutex(storeMutex);
}

// Retrieve objects
std::set<SessionObject*> SessionObjectStore::getObjects()
{
	// Make sure that no other thread is in the process of changing
	// the object list when we return it
	MutexLocker lock(storeMutex);

	return objects;
}

void SessionObjectStore::getObjects(CK_SLOT_ID slotID, std::set<OSObject*> &inObjects)
{
	// Make sure that no other thread is in the process of changing
	// the object list when we return it
	MutexLocker lock(storeMutex);

	std::set<SessionObject*>::iterator it;
	for (it=objects.begin(); it!=objects.end(); ++it) {
		if ((*it)->hasSlotID(slotID))
			inObjects.insert(*it);
	}
}

// Create a new object
SessionObject* SessionObjectStore::createObject(CK_SLOT_ID slotID, CK_SESSION_HANDLE hSession, bool isPrivate)
{
	// Create the new object file
	SessionObject* newObject = new SessionObject(this, slotID, hSession, isPrivate);

	if (!newObject->isValid())
	{
		ERROR_MSG("Failed to create new object");

		delete newObject;

		return NULL;
	}

	// Now add it to the set of objects
	MutexLocker lock(storeMutex);

	objects.insert(newObject);
	allObjects.insert(newObject);

	DEBUG_MSG("(0x%08X) Created new object (0x%08X)", this, newObject);

	return newObject;
}

// Delete an object
bool SessionObjectStore::deleteObject(SessionObject* object)
{
	if (objects.find(object) == objects.end())
	{
		ERROR_MSG("Cannot delete non-existent object 0x%08X", object);

		return false;
	}

	MutexLocker lock(storeMutex);

	// Invalidate the object instance
	object->invalidate();

	objects.erase(object);

	return true;
}

// Indicate that a session has been closed; invalidates all objects
// associated with this session
void SessionObjectStore::sessionClosed(CK_SESSION_HANDLE hSession)
{
	MutexLocker lock(storeMutex);

	std::set<SessionObject*> checkObjects = objects;

	for (std::set<SessionObject*>::iterator i = checkObjects.begin(); i != checkObjects.end(); i++)
	{
        if ((*i)->removeOnSessionClose(hSession))
		{
			// Since the object remains in the allObjects set, any pointers to it will
			// remain valid but it will no longer be returned when the set of objects
			// is requested
			objects.erase(*i);
		}
    }
}

void SessionObjectStore::allSessionsClosed(CK_SLOT_ID slotID)
{
	MutexLocker lock(storeMutex);

	std::set<SessionObject*> checkObjects = objects;

	for (std::set<SessionObject*>::iterator i = checkObjects.begin(); i != checkObjects.end(); i++)
	{
		if ((*i)->removeOnAllSessionsClose(slotID))
		{
			// Since the object remains in the allObjects set, any pointers to it will
			// remain valid but it will no longer be returned when the set of objects
			// is requested
			objects.erase(*i);
		}
	}
}

void SessionObjectStore::tokenLoggedOut(CK_SLOT_ID slotID)
{
	MutexLocker lock(storeMutex);

	std::set<SessionObject*> checkObjects = objects;

	for (std::set<SessionObject*>::iterator i = checkObjects.begin(); i != checkObjects.end(); i++)
	{
		if ((*i)->removeOnTokenLogout(slotID))
		{
			// Since the object remains in the allObjects set, any pointers to it will
			// remain valid but it will no longer be returned when the set of objects
			// is requested
			objects.erase(*i);
		}
	}
}

// Clear the whole store
void SessionObjectStore::clearStore()
{
	MutexLocker lock(storeMutex);

	objects.clear();
	std::set<SessionObject*> clearObjects = allObjects;
	allObjects.clear();

	for (std::set<SessionObject*>::iterator i = clearObjects.begin(); i != clearObjects.end(); i++)
	{
		delete *i;
	}
}