/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file) 
 and all other portions of this file are Copyright (c) 2013-2016 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include "System.h"
#include <wx/cmdline.h>
#include <wx/tokenzr.h>
#include "Core/Core.h"
#include "Application.h"
#include "CommandLineInterface.h"
#include "LanguageStrings.h"
#include "UserInterfaceException.h"

namespace VeraCrypt
{
	CommandLineInterface::CommandLineInterface (int argc, wchar_t** argv, UserInterfaceType::Enum interfaceType) :
		ArgCommand (CommandId::None),
		ArgFilesystem (VolumeCreationOptions::FilesystemType::Unknown),
		ArgNewPim (-1),
		ArgNoHiddenVolumeProtection (false),
		ArgPim (-1),
		ArgSize (0),
		ArgVolumeType (VolumeType::Unknown),
		ArgTrueCryptMode (false),
		StartBackgroundTask (false)
	{
		wxCmdLineParser parser;
		parser.SetCmdLine (argc, argv);

		parser.SetSwitchChars (L"-");

		parser.AddOption (L"",  L"auto-mount",			_("Auto mount device-hosted/favorite volumes"));
		parser.AddSwitch (L"",  L"backup-headers",		_("Backup volume headers"));
		parser.AddSwitch (L"",  L"background-task",		_("Start Background Task"));
#ifdef TC_WINDOWS
		parser.AddSwitch (L"",  L"cache",				_("Cache passwords and keyfiles"));
#endif
		parser.AddSwitch (L"C", L"change",				_("Change password or keyfiles"));
		parser.AddSwitch (L"c", L"create",				_("Create new volume"));
		parser.AddSwitch (L"",	L"create-keyfile",		_("Create new keyfile"));
		parser.AddSwitch (L"",	L"delete-token-keyfiles", _("Delete security token keyfiles"));
		parser.AddSwitch (L"d", L"dismount",			_("Dismount volume"));
		parser.AddSwitch (L"",	L"display-password",	_("Display password while typing"));
		parser.AddOption (L"",	L"encryption",			_("Encryption algorithm"));
		parser.AddSwitch (L"",	L"explore",				_("Open explorer window for mounted volume"));
		parser.AddSwitch (L"",	L"export-token-keyfile",_("Export keyfile from security token"));
		parser.AddOption (L"",	L"filesystem",			_("Filesystem type"));
		parser.AddSwitch (L"f", L"force",				_("Force mount/dismount/overwrite"));
#if !defined(TC_WINDOWS) && !defined(TC_MACOSX)
		parser.AddOption (L"",	L"fs-options",			_("Filesystem mount options"));
#endif
		parser.AddOption (L"",	L"hash",				_("Hash algorithm"));
		parser.AddSwitch (L"h", L"help",				_("Display detailed command line help"), wxCMD_LINE_OPTION_HELP);
		parser.AddSwitch (L"",	L"import-token-keyfiles", _("Import keyfiles to security token"));
		parser.AddOption (L"k", L"keyfiles",			_("Keyfiles"));
		parser.AddSwitch (L"l", L"list",				_("List mounted volumes"));
		parser.AddSwitch (L"",	L"list-token-keyfiles",	_("List security token keyfiles"));
		parser.AddSwitch (L"",	L"load-preferences",	_("Load user preferences"));
		parser.AddSwitch (L"",	L"mount",				_("Mount volume interactively"));
		parser.AddOption (L"m", L"mount-options",		_("VeraCrypt volume mount options"));
		parser.AddOption (L"",	L"new-hash",			_("New hash algorithm"));
		parser.AddOption (L"",	L"new-keyfiles",		_("New keyfiles"));
		parser.AddOption (L"",	L"new-password",		_("New password"));
		parser.AddOption (L"",	L"new-pim",				_("New PIM"));
		parser.AddSwitch (L"",	L"non-interactive",		_("Do not interact with user"));
		parser.AddSwitch (L"",  L"stdin",				_("Read password from standard input"));
		parser.AddOption (L"p", L"password",			_("Password"));
		parser.AddOption (L"",  L"pim",					_("PIM"));
		parser.AddOption (L"",	L"protect-hidden",		_("Protect hidden volume"));
		parser.AddOption (L"",	L"protection-hash",		_("Hash algorithm for protected hidden volume"));
		parser.AddOption (L"",	L"protection-keyfiles",	_("Keyfiles for protected hidden volume"));
		parser.AddOption (L"",	L"protection-password",	_("Password for protected hidden volume"));
		parser.AddOption (L"",	L"protection-pim",		_("PIM for protected hidden volume"));
		parser.AddOption (L"",	L"random-source",		_("Use file as source of random data"));
		parser.AddSwitch (L"",  L"restore-headers",		_("Restore volume headers"));
		parser.AddSwitch (L"",	L"save-preferences",	_("Save user preferences"));
		parser.AddSwitch (L"",	L"quick",				_("Enable quick format"));
		parser.AddOption (L"",	L"size",				_("Size in bytes"));
		parser.AddOption (L"",	L"slot",				_("Volume slot number"));
		parser.AddSwitch (L"tc",L"truecrypt",			_("Enable TrueCrypt mode. Should be put first to avoid issues."));
		parser.AddSwitch (L"",	L"test",				_("Test internal algorithms"));
		parser.AddSwitch (L"t", L"text",				_("Use text user interface"));
		parser.AddOption (L"",	L"token-lib",			_("Security token library"));
		parser.AddSwitch (L"v", L"verbose",				_("Enable verbose output"));
		parser.AddSwitch (L"",	L"version",				_("Display version information"));
		parser.AddSwitch (L"",	L"volume-properties",	_("Display volume properties"));
		parser.AddOption (L"",	L"volume-type",			_("Volume type"));
		parser.AddParam (								_("Volume path"), wxCMD_LINE_VAL_STRING, wxCMD_LINE_PARAM_OPTIONAL);
		parser.AddParam (								_("Mount point"), wxCMD_LINE_VAL_STRING, wxCMD_LINE_PARAM_OPTIONAL);

		wxString str;
		bool param1IsVolume = false;
		bool param1IsMountedVolumeSpec = false;
		bool param1IsMountPoint = false;
		bool param1IsFile = false;

		if (parser.Parse () > 0)
			throw_err (_("Incorrect command line specified."));
		
		if (parser.Found (L"help"))
		{
			ArgCommand = CommandId::Help;
			return;
		}

		if (parser.Found (L"text") && interfaceType != UserInterfaceType::Text)
		{
			wstring msg = wstring (_("Option -t or --text must be specified as the first argument."));
			wcerr << msg << endl;
			throw_err (msg);
		}

		if (parser.Found (L"version"))
		{
			ArgCommand = CommandId::DisplayVersion;
			return;
		}

		// Preferences
		if (parser.Found (L"load-preferences"))
		{
			// Load preferences first to allow command line options to override them
			Preferences.Load();
			ArgMountOptions = Preferences.DefaultMountOptions;
		}

		// Commands
		if (parser.Found (L"auto-mount", &str))
		{
			CheckCommandSingle();

			wxStringTokenizer tokenizer (str, L",");
			while (tokenizer.HasMoreTokens())
			{
				wxString token = tokenizer.GetNextToken();

				if (token == L"devices")
				{
					if (ArgCommand == CommandId::AutoMountFavorites)
						ArgCommand = CommandId::AutoMountDevicesFavorites;
					else
						ArgCommand = CommandId::AutoMountDevices;

					param1IsMountPoint = true;
				}
				else if (token == L"favorites")
				{
					if (ArgCommand == CommandId::AutoMountDevices)
						ArgCommand = CommandId::AutoMountDevicesFavorites;
					else
						ArgCommand = CommandId::AutoMountFavorites;
				}
				else
				{
					throw_err (LangString["UNKNOWN_OPTION"] + L": " + token);
				}
			}
		}

		if (parser.Found (L"backup-headers"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::BackupHeaders;
			param1IsVolume = true;
		}

		if (parser.Found (L"change"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::ChangePassword;
			param1IsVolume = true;
		}

		if (parser.Found (L"create"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::CreateVolume;
			param1IsVolume = true;
		}

		if (parser.Found (L"create-keyfile"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::CreateKeyfile;
			param1IsFile = true;
		}
			
		if (parser.Found (L"delete-token-keyfiles"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::DeleteSecurityTokenKeyfiles;
		}

		if (parser.Found (L"dismount"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::DismountVolumes;
			param1IsMountedVolumeSpec = true;
		}
		
		if (parser.Found (L"export-token-keyfile"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::ExportSecurityTokenKeyfile;
		}

		if (parser.Found (L"import-token-keyfiles"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::ImportSecurityTokenKeyfiles;
		}

		if (parser.Found (L"list"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::ListVolumes;
			param1IsMountedVolumeSpec = true;
		}

		if (parser.Found (L"list-token-keyfiles"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::ListSecurityTokenKeyfiles;
		}

		if (parser.Found (L"mount"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::MountVolume;
			param1IsVolume = true;
		}

		if (parser.Found (L"save-preferences"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::SavePreferences;
		}

		if (parser.Found (L"test"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::Test;
		}

		if (parser.Found (L"volume-properties"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::DisplayVolumeProperties;
			param1IsMountedVolumeSpec = true;
		}

		// Options
		if (parser.Found (L"background-task"))
			StartBackgroundTask = true;

#ifdef TC_WINDOWS
		if (parser.Found (L"cache"))
			ArgMountOptions.CachePassword = true;
#endif
		ArgDisplayPassword = parser.Found (L"display-password");

		if (parser.Found (L"encryption", &str))
		{
			ArgEncryptionAlgorithm.reset();

			foreach (shared_ptr <EncryptionAlgorithm> ea, EncryptionAlgorithm::GetAvailableAlgorithms())
			{
				if (!ea->IsDeprecated() && wxString (ea->GetName()).IsSameAs (str, false))
					ArgEncryptionAlgorithm = ea;
			}

			if (!ArgEncryptionAlgorithm)
				throw_err (LangString["UNKNOWN_OPTION"] + L": " + str);
		}

		if (parser.Found (L"explore"))
			Preferences.OpenExplorerWindowAfterMount = true;

		if (parser.Found (L"filesystem", &str))
		{
			if (str.IsSameAs (L"none", false))
			{
				ArgMountOptions.NoFilesystem = true;
				ArgFilesystem = VolumeCreationOptions::FilesystemType::None;
			}
			else
			{
				ArgMountOptions.FilesystemType = wstring (str);
				
				if (str.IsSameAs (L"FAT", false))
					ArgFilesystem = VolumeCreationOptions::FilesystemType::FAT;
#ifdef TC_LINUX
				else if (str.IsSameAs (L"Ext2", false))
					ArgFilesystem = VolumeCreationOptions::FilesystemType::Ext2;
				else if (str.IsSameAs (L"Ext3", false))
					ArgFilesystem = VolumeCreationOptions::FilesystemType::Ext3;
				else if (str.IsSameAs (L"Ext4", false))
					ArgFilesystem = VolumeCreationOptions::FilesystemType::Ext4;
				else if (str.IsSameAs (L"NTFS", false))
					ArgFilesystem = VolumeCreationOptions::FilesystemType::NTFS;
				else if (str.IsSameAs (L"exFAT", false))
					ArgFilesystem = VolumeCreationOptions::FilesystemType::exFAT;
#elif defined (TC_MACOSX)
				else if (	str.IsSameAs (L"HFS", false) 
						|| 	str.IsSameAs (L"HFS+", false)
						||	str.IsSameAs (L"MacOsExt", false)
						)
				{
					ArgFilesystem = VolumeCreationOptions::FilesystemType::MacOsExt;
				}
#elif defined (TC_FREEBSD) || defined (TC_SOLARIS)
				else if (str.IsSameAs (L"UFS", false))
					ArgFilesystem = VolumeCreationOptions::FilesystemType::UFS;
#endif
				else
					ArgFilesystem = VolumeCreationOptions::FilesystemType::None;
			}
		}

		ArgForce = parser.Found (L"force");
		
		ArgTrueCryptMode = parser.Found (L"truecrypt");

#if !defined(TC_WINDOWS) && !defined(TC_MACOSX)
		if (parser.Found (L"fs-options", &str))
			ArgMountOptions.FilesystemOptions = str;
#endif

		if (parser.Found (L"hash", &str))
		{
			ArgHash.reset();

			foreach (shared_ptr <Hash> hash, Hash::GetAvailableAlgorithms())
			{
				wxString hashName (hash->GetName());
				wxString hashAltName (hash->GetAltName());
				if (hashName.IsSameAs (str, false) || hashAltName.IsSameAs (str, false))
					ArgHash = hash;
			}

			if (!ArgHash)
				throw_err (LangString["UNKNOWN_OPTION"] + L": " + str);
		}

		if (parser.Found (L"new-hash", &str))
		{
			ArgNewHash.reset();

			foreach (shared_ptr <Hash> hash, Hash::GetAvailableAlgorithms())
			{
				wxString hashName (hash->GetName());
				wxString hashAltName (hash->GetAltName());
				if (hashName.IsSameAs (str, false) || hashAltName.IsSameAs (str, false))
					ArgNewHash = hash;
			}

			if (!ArgNewHash)
				throw_err (LangString["UNKNOWN_OPTION"] + L": " + str);
		}

		if (parser.Found (L"keyfiles", &str))
			ArgKeyfiles = ToKeyfileList (str);

		if (parser.Found (L"mount-options", &str))
		{
			wxStringTokenizer tokenizer (str, L",");
			while (tokenizer.HasMoreTokens())
			{
				wxString token = tokenizer.GetNextToken();

				if (token == L"headerbak")
					ArgMountOptions.UseBackupHeaders = true;
				else if (token == L"nokernelcrypto")
					ArgMountOptions.NoKernelCrypto = true;
				else if (token == L"readonly" || token == L"ro")
					ArgMountOptions.Protection = VolumeProtection::ReadOnly;
				else if (token == L"system")
					ArgMountOptions.PartitionInSystemEncryptionScope = true;
				else if (token == L"timestamp" || token == L"ts")
					ArgMountOptions.PreserveTimestamps = false;
#ifdef TC_WINDOWS
				else if (token == L"removable" || token == L"rm")
					ArgMountOptions.Removable = true;
#endif
				else
					throw_err (LangString["UNKNOWN_OPTION"] + L": " + token);
			}
		}

		if (parser.Found (L"new-keyfiles", &str))
			ArgNewKeyfiles = ToKeyfileList (str);

		if (parser.Found (L"new-password", &str))
			ArgNewPassword = ToUTF8Password (str);
		
		if (parser.Found (L"new-pim", &str))
		{
			try
			{
				ArgNewPim = StringConverter::ToInt32 (wstring (str));
			}
			catch (...)
			{
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			}

			if (ArgNewPim < 0)
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			else if (ArgNewPim > 0 && ArgTrueCryptMode)
				throw_err (LangString["PIM_NOT_SUPPORTED_FOR_TRUECRYPT_MODE"]);
		}
		
		if (parser.Found (L"non-interactive"))
		{
			if (interfaceType != UserInterfaceType::Text)
				throw_err (L"--non-interactive is supported only in text mode");

			Preferences.NonInteractive = true;
		}

		if (parser.Found (L"stdin"))
		{
			if (!Preferences.NonInteractive)
				throw_err (L"--stdin is supported only in non-interactive mode");

			Preferences.UseStandardInput = true;
		}

		if (parser.Found (L"password", &str))
		{
			if (Preferences.UseStandardInput)
				throw_err (L"--password cannot be used with --stdin");
			ArgPassword = ToUTF8Password (str);
		}

		if (parser.Found (L"pim", &str))
		{
			try
			{
				ArgPim = StringConverter::ToInt32 (wstring (str));
			}
			catch (...)
			{
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			}

			if (ArgPim < 0)
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			else if (ArgPim > 0 && ArgTrueCryptMode)
				throw_err (LangString["PIM_NOT_SUPPORTED_FOR_TRUECRYPT_MODE"]);
		}

		if (parser.Found (L"protect-hidden", &str))
		{
			if (str == L"yes")
			{
				if (ArgMountOptions.Protection != VolumeProtection::ReadOnly)
					ArgMountOptions.Protection = VolumeProtection::HiddenVolumeReadOnly;
			}
			else if (str == L"no")
				ArgNoHiddenVolumeProtection = true;
			else
				throw_err (LangString["UNKNOWN_OPTION"] + L": " + str);
		}

		if (parser.Found (L"protection-keyfiles", &str))
		{
			ArgMountOptions.ProtectionKeyfiles = ToKeyfileList (str);
			ArgMountOptions.Protection = VolumeProtection::HiddenVolumeReadOnly;
		}
		
		if (parser.Found (L"protection-password", &str))
		{
			ArgMountOptions.ProtectionPassword = ToUTF8Password (str);
			ArgMountOptions.Protection = VolumeProtection::HiddenVolumeReadOnly;
		}
		
		if (parser.Found (L"protection-pim", &str))
		{
			int pim = -1;
			try
			{
				pim = StringConverter::ToInt32 (wstring (str));
				if (pim < 0)
					throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			}
			catch (...)
			{
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			}
			ArgMountOptions.ProtectionPim = pim;
			ArgMountOptions.Protection = VolumeProtection::HiddenVolumeReadOnly;
		}

		if (parser.Found (L"protection-hash", &str))
		{
			bool bHashFound = false;
			foreach (shared_ptr <Hash> hash, Hash::GetAvailableAlgorithms())
			{
				wxString hashName (hash->GetName());
				wxString hashAltName (hash->GetAltName());
				if (hashName.IsSameAs (str, false) || hashAltName.IsSameAs (str, false))
				{
					bHashFound = true;
					ArgMountOptions.ProtectionKdf = Pkcs5Kdf::GetAlgorithm (*hash, ArgTrueCryptMode);
				}
			}

			if (!bHashFound)
				throw_err (LangString["UNKNOWN_OPTION"] + L": " + str);
		}

		ArgQuick = parser.Found (L"quick");

		if (parser.Found (L"random-source", &str))
			ArgRandomSourcePath = FilesystemPath (str.wc_str());

		if (parser.Found (L"restore-headers"))
		{
			CheckCommandSingle();
			ArgCommand = CommandId::RestoreHeaders;
			param1IsVolume = true;
		}

		if (parser.Found (L"slot", &str))
		{
			unsigned long number;
			if (!str.ToULong (&number) || number < Core->GetFirstSlotNumber() || number > Core->GetLastSlotNumber())
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);

			ArgMountOptions.SlotNumber = number;

			if (param1IsMountedVolumeSpec)
			{
				shared_ptr <VolumeInfo> volume = Core->GetMountedVolume (number);
				if (!volume)
					throw_err (_("No such volume is mounted."));

				ArgVolumes.push_back (volume);
				param1IsMountedVolumeSpec = false;
			}
		}

		if (parser.Found (L"size", &str))
		{
			uint64 multiplier;
			wxChar lastChar = str [str.Length () - 1];
			if (lastChar >= wxT('0') && lastChar <= wxT('9'))
				multiplier = 1;
			else if (lastChar == wxT('K') || lastChar == wxT('k'))
				multiplier = BYTES_PER_KB;
			else if (lastChar == wxT('M') || lastChar == wxT('m'))
				multiplier = BYTES_PER_MB;
			else if (lastChar == wxT('G') || lastChar == wxT('g'))
				multiplier = BYTES_PER_GB;
			else if (lastChar == wxT('T') || lastChar == wxT('t'))
				multiplier = BYTES_PER_TB;
			else
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);

			// remove suffix if present
			if (multiplier != 1)
				str.RemoveLast ();
			// check that we only have digits in the string
			size_t index = str.find_first_not_of (wxT("0123456789"));
			if (index != (size_t) wxNOT_FOUND)
			{
				// restore last characater for error display
				if (multiplier != 1)
					str += lastChar;
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			}
			try
			{
				ArgSize = multiplier * StringConverter::ToUInt64 (wstring (str));
			}
			catch (...)
			{
				throw_err (LangString["PARAMETER_INCORRECT"] + L": " + str);
			}
		}

		if (parser.Found (L"token-lib", &str))
			Preferences.SecurityTokenModule = wstring (str);

		if (parser.Found (L"verbose"))
			Preferences.Verbose = true;

		if (parser.Found (L"volume-type", &str))
		{
			if (str.IsSameAs (L"normal", false))
				ArgVolumeType = VolumeType::Normal;
			else if (str.IsSameAs (L"hidden", false))
				ArgVolumeType = VolumeType::Hidden;
			else
				throw_err (LangString["UNKNOWN_OPTION"] + L": " + str);
		}

		// Parameters
		if (parser.GetParamCount() > 0)
		{
			// in case of GUI interface, we load the preference when only 
			// specifying volume path without any option/switch
			if (Application::GetUserInterfaceType() != UserInterfaceType::Text)
			{
				// check if only parameters were specified in the command line
				// (e.g. when associating .hc extension in mimetype with /usr/bin/veracrypt)
				bool onlyParametersPresent = (parser.GetParamCount() == (size_t) (argc - 1));

				if (onlyParametersPresent)
				{
					// no options/switches, so we load prefences now
					Preferences.Load();
					ArgMountOptions = Preferences.DefaultMountOptions;
				}
			}

			if (ArgCommand == CommandId::None)
			{
				ArgCommand = CommandId::MountVolume;
				param1IsVolume = true;
			}

			if (param1IsVolume)
			{
				wxFileName volPath (parser.GetParam (0));
				
#ifdef TC_WINDOWS
				if (!parser.GetParam (0).StartsWith (L"\\Device\\"))
#endif
					volPath.Normalize (wxPATH_NORM_ABSOLUTE | wxPATH_NORM_DOTS);

				ArgVolumePath.reset (new VolumePath (wstring (volPath.GetFullPath())));
			}

			if (param1IsMountPoint || parser.GetParamCount() >= 2)
			{
				wstring s (parser.GetParam (param1IsMountPoint ? 0 : 1));

				if (s.empty())
					ArgMountOptions.NoFilesystem = true;

				wxFileName mountPoint (wstring (Directory::AppendSeparator (s)));
				mountPoint.Normalize (wxPATH_NORM_ABSOLUTE | wxPATH_NORM_DOTS);
				ArgMountPoint.reset (new DirectoryPath (wstring (mountPoint.GetPath())));
			}

			if (param1IsFile)
			{
				ArgFilePath.reset (new FilePath (parser.GetParam (0).wc_str()));
			}
		}

		if (param1IsMountedVolumeSpec)
			ArgVolumes = GetMountedVolumes (parser.GetParamCount() > 0 ? parser.GetParam (0) : wxString());

		if (ArgCommand == CommandId::None && Application::GetUserInterfaceType() == UserInterfaceType::Text)
			parser.Usage();
	}

	CommandLineInterface::~CommandLineInterface ()
	{
	}

	void CommandLineInterface::CheckCommandSingle () const
	{
		if (ArgCommand != CommandId::None)
			throw_err (_("Only a single command can be specified at a time."));
	}

	shared_ptr <KeyfileList> CommandLineInterface::ToKeyfileList (const wxString &arg) const
	{
		wxStringTokenizer tokenizer (arg, L",", wxTOKEN_RET_EMPTY_ALL);

		// Handle escaped separator
		wxArrayString arr;
		bool prevEmpty = false;
		while (tokenizer.HasMoreTokens())
		{
			wxString token = tokenizer.GetNextToken();

			if (prevEmpty && token.empty() && tokenizer.HasMoreTokens())
			{
				token = tokenizer.GetNextToken();
				if (!token.empty())
				{
					arr.Add (token);
					prevEmpty = true;
					continue;
				}
			}
			
			if (token.empty() && !tokenizer.HasMoreTokens())
				break;

			if (prevEmpty || token.empty())
			{
				if (arr.Count() < 1)
				{
					arr.Add (L"");
					continue;
				}
				arr.Last() += token.empty() ? L"," : token.wc_str();
			}
			else
				arr.Add (token);

			prevEmpty = token.empty();
		}

		make_shared_auto (KeyfileList, keyfileList);
		for (size_t i = 0; i < arr.GetCount(); i++)
		{
			if (!arr[i].empty())
				keyfileList->push_back (make_shared <Keyfile> (wstring (arr[i])));
		}

		return keyfileList;
	}

	VolumeInfoList CommandLineInterface::GetMountedVolumes (const wxString &mountedVolumeSpec) const
	{
		VolumeInfoList volumes = Core->GetMountedVolumes ();
		VolumeInfoList filteredVolumes;

		wxFileName pathFilter;
		if (!mountedVolumeSpec.empty())
		{
			pathFilter = mountedVolumeSpec;
			pathFilter.Normalize (wxPATH_NORM_ABSOLUTE | wxPATH_NORM_DOTS);
		}
		else
			return volumes;

		foreach (shared_ptr <VolumeInfo> volume, volumes)
		{
			if (mountedVolumeSpec.empty())
			{
				filteredVolumes.push_back (volume);
			}
			else if (wxString (wstring(volume->Path)) == pathFilter.GetFullPath())
			{
				filteredVolumes.push_back (volume);
			}
			else if (wxString (wstring(volume->MountPoint)) == pathFilter.GetFullPath()
				|| (wxString (wstring(volume->MountPoint)) + wxFileName::GetPathSeparator()) == pathFilter.GetFullPath())
			{
				filteredVolumes.push_back (volume);
			}
		}
		
		if (!mountedVolumeSpec.IsEmpty() && filteredVolumes.size() < 1)
			throw_err (_("No such volume is mounted."));

		return filteredVolumes;
	}

	shared_ptr<VolumePassword> ToUTF8Password (const wchar_t* str, size_t charCount)
	{
		if (charCount > 0)
		{
			shared_ptr<SecureBuffer> utf8Buffer = ToUTF8Buffer (str, charCount);
			return shared_ptr<VolumePassword>(new VolumePassword (*utf8Buffer));
		}
		else
			return shared_ptr<VolumePassword>(new VolumePassword ());
	}

	shared_ptr<SecureBuffer> ToUTF8Buffer (const wchar_t* str, size_t charCount)
	{
		if (charCount == (size_t) -1)
			charCount = wcslen (str);

		if (charCount > 0)
		{
			wxMBConvUTF8 utf8;
			size_t ulen = utf8.FromWChar (NULL, 0, str, charCount);
			if (wxCONV_FAILED == ulen)
				throw PasswordUTF8Invalid (SRC_POS);
			SecureBuffer passwordBuf(ulen);
			ulen = utf8.FromWChar ((char*) (byte*) passwordBuf, ulen, str, charCount);
			if (wxCONV_FAILED == ulen)
				throw PasswordUTF8Invalid (SRC_POS);
			if (ulen > VolumePassword::MaxSize)
				throw PasswordUTF8TooLong (SRC_POS);

			ConstBufferPtr utf8Buffer ((byte*) passwordBuf, ulen);
			return shared_ptr<SecureBuffer>(new SecureBuffer (utf8Buffer));
		}
		else
			return shared_ptr<SecureBuffer>(new SecureBuffer ());
	}

	auto_ptr <CommandLineInterface> CmdLine;
}