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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.
*/

#ifndef TC_HEADER_Volume_Volume
#define TC_HEADER_Volume_Volume

#include "Platform/Platform.h"
#include "Platform/StringConverter.h"
#include "EncryptionAlgorithm.h"
#include "EncryptionMode.h"
#include "Keyfile.h"
#include "VolumePassword.h"
#include "VolumeException.h"
#include "VolumeLayout.h"

namespace TrueCrypt
{
	class VolumePath
	{
	public:
		VolumePath () { }
		VolumePath (const wstring &path) { Data = path; }
		VolumePath (const FilesystemPath &path) { Data = path; }

		bool operator== (const VolumePath &other) const { return Data == other.Data; }
		bool operator!= (const VolumePath &other) const { return Data != other.Data; }
		operator FilesystemPath () const { return FilesystemPath (Data); }
		operator string () const { return StringConverter::ToSingle (Data); }
		operator wstring () const { return Data; }

		bool IsDevice () const { return FilesystemPath (Data).IsBlockDevice() || FilesystemPath (Data).IsCharacterDevice(); }
		bool IsEmpty () const { return Data.empty(); }

	protected:
		wstring Data;
	};

	typedef list <VolumePath> VolumePathList;

	struct VolumeProtection
	{
		enum Enum
		{
			None,
			ReadOnly,
			HiddenVolumeReadOnly
		};
	};

	class Volume
	{
	public:
		Volume ();
		virtual ~Volume ();

		void Close ();
		shared_ptr <EncryptionAlgorithm> GetEncryptionAlgorithm () const;
		shared_ptr <EncryptionMode> GetEncryptionMode () const;
		shared_ptr <File> GetFile () const { return VolumeFile; }
		uint64 GetHeaderCreationTime () const { return Header->GetHeaderCreationTime(); }
		VolumePath GetPath () const { return VolumeFile->GetPath(); }
		VolumeProtection::Enum GetProtectionType () const { return Protection; }
		shared_ptr <Pkcs5Kdf> GetPkcs5Kdf () const { return Header->GetPkcs5Kdf(); }
		uint32 GetSaltSize () const { return Header->GetSaltSize(); }
		size_t GetSectorSize () const { return SectorSize; }
		uint64 GetSize () const { return VolumeDataSize; }
		uint64 GetTotalDataRead () const { return TotalDataRead; }
		uint64 GetTotalDataWritten () const { return TotalDataWritten; }
		VolumeType::Enum GetType () const { return Type; }
		uint64 GetVolumeCreationTime () const { return Header->GetVolumeCreationTime(); }
		bool IsHiddenVolumeProtectionTriggered () const { return HiddenVolumeProtectionTriggered; }
		void Open (const VolumePath &volumePath, bool preserveTimestamps, shared_ptr <VolumePassword> password, shared_ptr <KeyfileList> keyfiles, VolumeProtection::Enum protection = VolumeProtection::None, shared_ptr <VolumePassword> protectionPassword = shared_ptr <VolumePassword> (), shared_ptr <KeyfileList> protectionKeyfiles = shared_ptr <KeyfileList> (), bool sharedAccessAllowed = false, VolumeType::Enum volumeType = VolumeType::Unknown);
		void Open (shared_ptr <File> volumeFile, shared_ptr <VolumePassword> password, shared_ptr <KeyfileList> keyfiles, VolumeProtection::Enum protection = VolumeProtection::None, shared_ptr <VolumePassword> protectionPassword = shared_ptr <VolumePassword> (), shared_ptr <KeyfileList> protectionKeyfiles = shared_ptr <KeyfileList> (), VolumeType::Enum volumeType = VolumeType::Unknown);
		void ReadSectors (const BufferPtr &buffer, uint64 byteOffset);
		void ReEncryptHeader (const ConstBufferPtr &newSalt, const ConstBufferPtr &newHeaderKey, shared_ptr <Pkcs5Kdf> newPkcs5Kdf);
		void WriteSectors (const ConstBufferPtr &buffer, uint64 byteOffset);

	protected:
		void CheckProtectedRange (uint64 writeHostOffset, uint64 writeLength);
		void ValidateState () const;

		shared_ptr <EncryptionAlgorithm> EA;
		shared_ptr <VolumeHeader> Header;
		bool HiddenVolumeProtectionTriggered;
		shared_ptr <VolumeLayout> Layout;
		uint64 ProtectedRangeStart;
		uint64 ProtectedRangeEnd;
		VolumeProtection::Enum Protection;
		size_t SectorSize;
		VolumeType::Enum Type;
		shared_ptr <File> VolumeFile;
		uint64 VolumeHostSize;
		uint64 VolumeDataOffset; 
		uint64 VolumeDataSize;
		uint64 TotalDataRead;
		uint64 TotalDataWritten;

	private:
		Volume (const Volume &);
		Volume &operator= (const Volume &);
	};
}

#endif // TC_HEADER_Volume_Volume

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