Windows: Add first version of VeraCryptExpander who is based on extcv. Minor modification to Mount.c to avoid link errors when building VeraCryptExpander.

author: Mounir IDRASSI <mounir.idrassi@idrix.fr> 2015-01-20 09:02:17 +0100
committer: Mounir IDRASSI <mounir.idrassi@idrix.fr> 2015-01-20 12:42:04 +0100
commit: 1efb78266631d4c3aa0cd28e32485a9f2016f9de (patch)
tree: e6c5bda4e202e4858e2f27db8413356e9ccd875f /src/ExpandVolume/InitDataArea.c
parent: 38f3fc816ac1a9f894bc01a6cf9d9b97c2a2e21a (diff)
download: VeraCrypt-1efb78266631d4c3aa0cd28e32485a9f2016f9de.tar.gz
VeraCrypt-1efb78266631d4c3aa0cd28e32485a9f2016f9de.zip
1 files changed, 358 insertions, 0 deletions
diff --git a/src/ExpandVolume/InitDataArea.c b/src/ExpandVolume/InitDataArea.c
new file mode 100644
index 00000000..a3793e86
--- /dev/null
+++ b/src/ExpandVolume/InitDataArea.c
@@ -0,0 +1,358 @@
+/*
+
+Most of the source code contained in this file is taken from the source code of
+TrueCrypt 7.0a, which is governed by the TrueCrypt License 3.0 that can be found
+in the file 'License.txt' in the folder 'TrueCrypt-License'.
+
+Modifications and additions to the original source code (contained in this file)
+and all other portions of this file are Copyright (c) 2009-2010 by Kih-Oskh or
+Copyright (c) 2012-2013 Josef Schneider <josef@netpage.dk>
+
+
+Source code here is copied from 'Common/Format.c' with the following changes:
+
+	- functions removed:
+		GetVolumeDataAreaSize (BOOL hiddenVolume, uint64 volumeSize)
+		TCFormatVolume (volatile FORMAT_VOL_PARAMETERS *volParams)
+		FormatNtfs (int driveNo, int clusterSize)
+		FormatExCallback (int command, DWORD subCommand, PVOID parameter)
+
+	- variables removed:
+		volatile BOOLEAN FormatExResult;
+
+	- removed static linkage class from StartFormatWriteThread() and
+	  StopFormatWriteThread()
+
+	- new functions:
+		SetFormatSectorSize(uint32 sector_size)
+
+
+-------------------------------------------------------------------------------
+
+Original legal notice of the TrueCrypt source:
+
+ Legal Notice: Some portions of the source code contained in this file were
+ derived from the source code of Encryption for the Masses 2.02a, which is
+ Copyright (c) 1998-2000 Paul Le Roux and which is governed by the 'License
+ Agreement for Encryption for the Masses'. Modifications and additions to
+ the original source code (contained in this file) and all other portions
+ of this file are Copyright (c) 2003-2010 TrueCrypt Developers Association
+ and are governed by the TrueCrypt License 3.0 the full text of which is
+ contained in the file License.txt included in TrueCrypt binary and source
+ code distribution packages. */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "Tcdefs.h"
+
+#include "Common.h"
+#include "Crypto.h"
+#include "Random.h"
+#include "Volumes.h"
+
+#include "Apidrvr.h"
+#include "Dlgcode.h"
+#include "Language.h"
+#include "Progress.h"
+#include "Resource.h"
+
+#include "InitDataArea.h"
+
+int FormatWriteBufferSize = 1024 * 1024;
+static uint32 FormatSectorSize = 0;
+
+void SetFormatSectorSize(uint32 sector_size)
+{
+	FormatSectorSize = sector_size;
+}
+
+int FormatNoFs (HWND hwndDlg, unsigned __int64 startSector, __int64 num_sectors, void * dev, PCRYPTO_INFO cryptoInfo, BOOL quickFormat)
+{
+	int write_buf_cnt = 0;
+	char sector[TC_MAX_VOLUME_SECTOR_SIZE], *write_buf;
+	unsigned __int64 nSecNo = startSector;
+	int retVal = 0;
+	DWORD err;
+	char temporaryKey[MASTER_KEYDATA_SIZE];
+	char originalK2[MASTER_KEYDATA_SIZE];
+
+	LARGE_INTEGER startOffset;
+	LARGE_INTEGER newOffset;
+
+	// Seek to start sector
+	startOffset.QuadPart = startSector * FormatSectorSize;
+	if (!SetFilePointerEx ((HANDLE) dev, startOffset, &newOffset, FILE_BEGIN)
+		|| newOffset.QuadPart != startOffset.QuadPart)
+	{
+		return ERR_OS_ERROR;
+	}
+
+	write_buf = (char *)TCalloc (FormatWriteBufferSize);
+	if (!write_buf)
+		return ERR_OUTOFMEMORY;
+
+	VirtualLock (temporaryKey, sizeof (temporaryKey));
+	VirtualLock (originalK2, sizeof (originalK2));
+
+	memset (sector, 0, sizeof (sector));
+
+	// Remember the original secondary key (XTS mode) before generating a temporary one
+	memcpy (originalK2, cryptoInfo->k2, sizeof (cryptoInfo->k2));
+
+	/* Fill the rest of the data area with random data */
+
+	if(!quickFormat)
+	{
+		/* Generate a random temporary key set to be used for "dummy" encryption that will fill
+		the free disk space (data area) with random data.  This is necessary for plausible
+		deniability of hidden volumes. */
+
+		// Temporary master key
+		if (!RandgetBytes (hwndDlg, temporaryKey, EAGetKeySize (cryptoInfo->ea), FALSE))
+			goto fail;
+
+		// Temporary secondary key (XTS mode)
+		if (!RandgetBytes (hwndDlg, cryptoInfo->k2, sizeof cryptoInfo->k2, FALSE))
+			goto fail;
+
+		retVal = EAInit (cryptoInfo->ea, temporaryKey, cryptoInfo->ks);
+		if (retVal != ERR_SUCCESS)
+			goto fail;
+
+		if (!EAInitMode (cryptoInfo))
+		{
+			retVal = ERR_MODE_INIT_FAILED;
+			goto fail;
+		}
+
+		while (num_sectors--)
+		{
+			if (WriteSector (dev, sector, write_buf, &write_buf_cnt, &nSecNo,
+				cryptoInfo) == FALSE)
+				goto fail;
+		}
+
+		if (!FlushFormatWriteBuffer (dev, write_buf, &write_buf_cnt, &nSecNo, cryptoInfo))
+			goto fail;
+	}
+	else
+		nSecNo = num_sectors;
+
+	UpdateProgressBar (nSecNo * FormatSectorSize);
+
+	// Restore the original secondary key (XTS mode) in case NTFS format fails and the user wants to try FAT immediately
+	memcpy (cryptoInfo->k2, originalK2, sizeof (cryptoInfo->k2));
+
+	// Reinitialize the encryption algorithm and mode in case NTFS format fails and the user wants to try FAT immediately
+	retVal = EAInit (cryptoInfo->ea, cryptoInfo->master_keydata, cryptoInfo->ks);
+	if (retVal != ERR_SUCCESS)
+		goto fail;
+	if (!EAInitMode (cryptoInfo))
+	{
+		retVal = ERR_MODE_INIT_FAILED;
+		goto fail;
+	}
+
+	burn (temporaryKey, sizeof(temporaryKey));
+	burn (originalK2, sizeof(originalK2));
+	VirtualUnlock (temporaryKey, sizeof (temporaryKey));
+	VirtualUnlock (originalK2, sizeof (originalK2));
+	TCfree (write_buf);
+
+	return 0;
+
+fail:
+	err = GetLastError();
+
+	burn (temporaryKey, sizeof(temporaryKey));
+	burn (originalK2, sizeof(originalK2));
+	VirtualUnlock (temporaryKey, sizeof (temporaryKey));
+	VirtualUnlock (originalK2, sizeof (originalK2));
+	TCfree (write_buf);
+
+	SetLastError (err);
+	return (retVal ? retVal : ERR_OS_ERROR);
+}
+
+
+BOOL WriteSector (void *dev, char *sector,
+	     char *write_buf, int *write_buf_cnt,
+	     __int64 *nSecNo, PCRYPTO_INFO cryptoInfo)
+{
+	static __int32 updateTime = 0;
+
+	(*nSecNo)++;
+
+	memcpy (write_buf + *write_buf_cnt, sector, FormatSectorSize);
+	(*write_buf_cnt) += FormatSectorSize;
+
+	if (*write_buf_cnt == FormatWriteBufferSize && !FlushFormatWriteBuffer (dev, write_buf, write_buf_cnt, nSecNo, cryptoInfo))
+		return FALSE;
+
+	if (GetTickCount () - updateTime > 25)
+	{
+		if (UpdateProgressBar (*nSecNo * FormatSectorSize))
+			return FALSE;
+
+		updateTime = GetTickCount ();
+	}
+
+	return TRUE;
+
+}
+
+
+static volatile BOOL WriteThreadRunning;
+static volatile BOOL WriteThreadExitRequested;
+static HANDLE WriteThreadHandle;
+
+static byte *WriteThreadBuffer;
+static HANDLE WriteBufferEmptyEvent;
+static HANDLE WriteBufferFullEvent;
+
+static volatile HANDLE WriteRequestHandle;
+static volatile int WriteRequestSize;
+static volatile DWORD WriteRequestResult;
+
+
+static void __cdecl FormatWriteThreadProc (void *arg)
+{
+	DWORD bytesWritten;
+
+	SetThreadPriority (GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
+
+	while (!WriteThreadExitRequested)
+	{
+		if (WaitForSingleObject (WriteBufferFullEvent, INFINITE) == WAIT_FAILED)
+		{
+			handleWin32Error (NULL);
+			break;
+		}
+
+		if (WriteThreadExitRequested)
+			break;
+
+		if (!WriteFile (WriteRequestHandle, WriteThreadBuffer, WriteRequestSize, &bytesWritten, NULL))
+			WriteRequestResult = GetLastError();
+		else
+			WriteRequestResult = ERROR_SUCCESS;
+
+		if (!SetEvent (WriteBufferEmptyEvent))
+		{
+			handleWin32Error (NULL);
+			break;
+		}
+	}
+
+	WriteThreadRunning = FALSE;
+	_endthread();
+}
+
+
+BOOL StartFormatWriteThread ()
+{
+	DWORD sysErr;
+
+	WriteBufferEmptyEvent = NULL;
+	WriteBufferFullEvent = NULL;
+	WriteThreadBuffer = NULL;
+
+	WriteBufferEmptyEvent = CreateEvent (NULL, FALSE, TRUE, NULL);
+	if (!WriteBufferEmptyEvent)
+		goto err;
+
+	WriteBufferFullEvent = CreateEvent (NULL, FALSE, FALSE, NULL);
+	if (!WriteBufferFullEvent)
+		goto err;
+
+	WriteThreadBuffer = TCalloc (FormatWriteBufferSize);
+	if (!WriteThreadBuffer)
+	{
+		SetLastError (ERROR_OUTOFMEMORY);
+		goto err;
+	}
+
+	WriteThreadExitRequested = FALSE;
+	WriteRequestResult = ERROR_SUCCESS;
+
+	WriteThreadHandle = (HANDLE) _beginthread (FormatWriteThreadProc, 0, NULL);
+	if ((uintptr_t) WriteThreadHandle == -1L)
+		goto err;
+
+	WriteThreadRunning = TRUE;
+	return TRUE;
+
+err:
+	sysErr = GetLastError();
+
+	if (WriteBufferEmptyEvent)
+		CloseHandle (WriteBufferEmptyEvent);
+	if (WriteBufferFullEvent)
+		CloseHandle (WriteBufferFullEvent);
+	if (WriteThreadBuffer)
+		TCfree (WriteThreadBuffer);
+
+	SetLastError (sysErr);
+	return FALSE;
+}
+
+
+void StopFormatWriteThread ()
+{
+	if (WriteThreadRunning)
+	{
+		WaitForSingleObject (WriteBufferEmptyEvent, INFINITE);
+
+		WriteThreadExitRequested = TRUE;
+		SetEvent (WriteBufferFullEvent);
+
+		WaitForSingleObject (WriteThreadHandle, INFINITE);
+	}
+
+	CloseHandle (WriteBufferEmptyEvent);
+	CloseHandle (WriteBufferFullEvent);
+	TCfree (WriteThreadBuffer);
+}
+
+
+BOOL FlushFormatWriteBuffer (void *dev, char *write_buf, int *write_buf_cnt, __int64 *nSecNo, PCRYPTO_INFO cryptoInfo)
+{
+	UINT64_STRUCT unitNo;
+	DWORD bytesWritten;
+
+	if (*write_buf_cnt == 0)
+		return TRUE;
+
+	unitNo.Value = (*nSecNo * FormatSectorSize - *write_buf_cnt) / ENCRYPTION_DATA_UNIT_SIZE;
+
+	EncryptDataUnits (write_buf, &unitNo, *write_buf_cnt / ENCRYPTION_DATA_UNIT_SIZE, cryptoInfo);
+
+	if (WriteThreadRunning)
+	{
+		if (WaitForSingleObject (WriteBufferEmptyEvent, INFINITE) == WAIT_FAILED)
+			return FALSE;
+
+		if (WriteRequestResult != ERROR_SUCCESS)
+		{
+			SetEvent (WriteBufferEmptyEvent);
+			SetLastError (WriteRequestResult);
+			return FALSE;
+		}
+
+		memcpy (WriteThreadBuffer, write_buf, *write_buf_cnt);
+		WriteRequestHandle = dev;
+		WriteRequestSize = *write_buf_cnt;
+
+		if (!SetEvent (WriteBufferFullEvent))
+			return FALSE;
+	}
+	else
+	{
+		if (!WriteFile ((HANDLE) dev, write_buf, *write_buf_cnt, &bytesWritten, NULL))
+			return FALSE;
+	}
+
+	*write_buf_cnt = 0;
+	return TRUE;
+}
author	Mounir IDRASSI <mounir.idrassi@idrix.fr>	2015-01-20 09:02:17 +0100
committer	Mounir IDRASSI <mounir.idrassi@idrix.fr>	2015-01-20 12:42:04 +0100
commit	1efb78266631d4c3aa0cd28e32485a9f2016f9de (patch)
tree	e6c5bda4e202e4858e2f27db8413356e9ccd875f /src/ExpandVolume/InitDataArea.c
parent	38f3fc816ac1a9f894bc01a6cf9d9b97c2a2e21a (diff)
download	VeraCrypt-1efb78266631d4c3aa0cd28e32485a9f2016f9de.tar.gz VeraCrypt-1efb78266631d4c3aa0cd28e32485a9f2016f9de.zip