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5.0

/*
 Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.

 Governed by the TrueCrypt License 2.4 the full text of which is contained
 in the file License.txt included in TrueCrypt binary and source code
 distribution packages.
*/

#include "EncryptionMode.h"
#include "EncryptionModeCBC.h"
#include "EncryptionModeLRW.h"
#include "EncryptionModeXTS.h"

namespace TrueCrypt
{
	EncryptionMode::EncryptionMode () : KeySet (false), SectorOffset (0)
	{
	}

	EncryptionMode::~EncryptionMode ()
	{
	}

	EncryptionModeList EncryptionMode::GetAvailableModes ()
	{
		EncryptionModeList l;

		l.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
		l.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
		l.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));

		return l;
	}

	void EncryptionMode::ValidateState () const
	{
		if (!KeySet || Ciphers.size() < 1)
			throw NotInitialized (SRC_POS);
	}

	void EncryptionMode::ValidateParameters (byte *data, uint64 length) const
	{
		if ((Ciphers.size() > 0 && (length % Ciphers.front()->GetBlockSize()) != 0))
			throw ParameterIncorrect (SRC_POS);
	}

	void EncryptionMode::ValidateParameters (byte *data, uint64 sectorCount, size_t sectorSize) const
	{
		if (sectorCount == 0 || sectorSize == 0 || (sectorSize % EncryptionDataUnitSize) != 0)
			throw ParameterIncorrect (SRC_POS);
	}
}

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