/* Copyright (c) 2008-2009 TrueCrypt Developers Association. All rights reserved. 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. */ #ifndef TC_HEADER_Boot_BootDefs #define TC_HEADER_Boot_BootDefs // Total memory required (CODE + DATA + BSS + STACK + 0x100) in KBytes - determined from linker map. #define TC__BOOT_MEMORY_REQUIRED 42 #ifdef TC_WINDOWS_BOOT_SINGLE_CIPHER_MODE # undef TC__BOOT_MEMORY_REQUIRED # ifdef TC_WINDOWS_BOOT_AES # ifdef TC_WINDOWS_BOOT_RESCUE_DISK_MODE # define TC__BOOT_MEMORY_REQUIRED 30 # else # define TC__BOOT_MEMORY_REQUIRED 28 # endif # elif defined (TC_WINDOWS_BOOT_SERPENT) # define TC__BOOT_MEMORY_REQUIRED 32 # elif defined (TC_WINDOWS_BOOT_TWOFISH) # define TC__BOOT_MEMORY_REQUIRED 40 # endif #if 0 # undef TC__BOOT_MEMORY_REQUIRED # define TC__BOOT_MEMORY_REQUIRED 60 #endif #endif // Modifying this value can introduce incompatibility with previous versions #define TC__BOOT_LOADER_SEGMENT TC_HEX (9000) // Some buggy BIOS routines fail if CS bits 0-10 are not zero #if TC__BOOT_MEMORY_REQUIRED <= 32 # define TC__BOOT_LOADER_SEGMENT_LOW (TC__BOOT_LOADER_SEGMENT - 32 * 1024 / 16) #else # define TC__BOOT_LOADER_SEGMENT_LOW (TC__BOOT_LOADER_SEGMENT - 64 * 1024 / 16) #endif #define TC__COM_EXECUTABLE_OFFSET TC_HEX (100) #define TC__BOOT_LOADER_LOWMEM_SEGMENT TC_HEX (2000) #define TC__BOOT_LOADER_BUFFER_SEGMENT TC_HEX (4000) #define TC__BOOT_LOADER_ALT_SEGMENT TC_HEX (6000) #define TC__BOOT_LOADER_STACK_TOP (TC_BOOT_MEMORY_REQUIRED * TC_UNSIGNED (1024) - 4) #define TC__LB_SIZE 512 #define TC__BOOT_LOADER_AREA_SECTOR_COUNT 63 #define TC__BOOT_SECTOR_VERSION_OFFSET 430 #define TC__BOOT_SECTOR_LOADER_LENGTH_OFFSET 432 #define TC__BOOT_SECTOR_LOADER_CHECKSUM_OFFSET 434 #define TC__BOOT_SECTOR_USER_CONFIG_OFFSET 438 #define TC__BOOT_SECTOR_CONFIG_OFFSET 439 // The last byte that is reserved for the boot loader #define TC__BOOT_SECTOR_USER_MESSAGE_MAX_LENGTH 24 #define TC__BOOT_SECTOR_USER_MESSAGE_OFFSET (TC__BOOT_SECTOR_VERSION_OFFSET - TC__BOOT_SECTOR_USER_MESSAGE_MAX_LENGTH) #define TC__BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_SIZE 4 #define TC__BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_OFFSET (TC__BOOT_SECTOR_USER_MESSAGE_OFFSET - TC__BOOT_SECTOR_OUTER_VOLUME_BAK_HEADER_CRC_SIZE) #define TC__BOOT_LOADER_DECOMPRESSOR_START_SECTOR 2 #define TC__BOOT_LOADER_DECOMPRESSOR_SECTOR_COUNT 4 #define TC__BOOT_LOADER_DECOMPRESSOR_MEMORY_SIZE 32768 #define TC__BOOT_LOADER_COMPRESSED_BUFFER_OFFSET (TC_COM_EXECUTABLE_OFFSET + 3072) #define TC__BOOT_LOADER_START_SECTOR (TC_BOOT_LOADER_DECOMPRESSOR_START_SECTOR + TC_BOOT_LOADER_DECOMPRESSOR_SECTOR_COUNT) #define TC__MAX_BOOT_LOADER_SECTOR_COUNT (TC_BOOT_LOADER_AREA_SECTOR_COUNT - TC_BOOT_LOADER_DECOMPRESSOR_SECTOR_COUNT - 2) #define TC__MAX_BOOT_LOADER_DECOMPRESSED_SIZE ((TC_BOOT_LOADER_AREA_SECTOR_COUNT - 2) * TC_LB_SIZE) #define TC__BOOT_LOADER_BACKUP_SECTOR_COUNT 30 #define TC__GZIP_HEADER_SIZE 10 #define TC__BOOT_CFG_FLAG_AREA_SIZE 1 // In bytes // If you add more flags, revise TC__BOOT_CFG_FLAG_AREA_SIZE #define TC__BOOT_CFG_FLAG_BACKUP_LOADER_AVAILABLE TC_HEX (02) #define TC__BOOT_CFG_FLAG_WINDOWS_VISTA_OR_LATER TC_HEX (04) #define TC__BOOT_CFG_FLAG_RESCUE_DISABLE_HW_ENCRYPTION TC_HEX (10) #define TC__BOOT_CFG_FLAG_RESCUE_DISK_ORIG_SYS_LOADER TC_HEX (20) #define TC__BOOT_CFG_MASK_HIDDEN_OS_CREATION_PHASE (TC_HEX (40) + TC_HEX (80)) // Modifying the following values can introduce incompatibility with previous versions #define TC__BOOT_USER_CFG_FLAG_SILENT_MODE TC_HEX (01) #define TC__BOOT_USER_CFG_FLAG_DISABLE_ESC TC_HEX (02) #define TC__BOOT_USER_CFG_FLAG_DISABLE_HW_ENCRYPTION TC_HEX (04) // The following items are treated as a 2-bit value (apply TC_BOOT_CFG_MASK_HIDDEN_OS_CREATION_PHASE to obtain the value) #define TC__HIDDEN_OS_CREATION_PHASE_NONE 0 #define TC__HIDDEN_OS_CREATION_PHASE_CLONING TC_HEX (40) // The boot loader is to copy the content of the system partition to the hidden volume #define TC__HIDDEN_OS_CREATION_PHASE_WIPING TC_HEX (80) // The boot loader has successfully copied the content of the system partition to the hidden volume. The original OS is to be wiped now. #define TC__HIDDEN_OS_CREATION_PHASE_WIPED (TC_HEX (40) + TC_HEX (80)) // The original OS has been wiped. The user is required to install a new OS (decoy OS) on the system partition now. #ifdef TC_ASM_PREPROCESS #define TC_HEX(N) 0##N##h #define TC_UNSIGNED(N) N TC_BOOT_MEMORY_REQUIRED = TC__BOOT_MEMORY_REQUIRED TC_BOOT_LOADER_SEGMENT = TC__BOOT_LOADER_SEGMENT TC_BOOT_LOADER_SEGMENT_LOW = TC__BOOT_LOADER_SEGMENT_LOW TC_COM_EXECUTABLE_OFFSET = TC__COM_EXECUTABLE_OFFSET TC_BOOT_LOADER_LOWMEM_SEGMENT = TC__BOOT_LOADER_LOWMEM_SEGMENT TC_BOOT_LOADER_BUFFER_SEGMENT = TC__BOOT_LOADER_BUFFER_SEGMENT TC_BOOT_LOADER_ALT_SEGMENT = TC__BOOT_LOADER_ALT_SEGMENT TC_BOOT_LOADER_STACK_TOP = TC__BOOT_LOADER_STACK_TOP TC_LB_SIZE = TC__LB_SIZE TC_BOOT_LOADER_AREA_SECTOR_COUNT = TC__BOOT_LOADER_AREA_SECTOR_COUNT TC_BOOT_SECTOR_LOADER_LENGTH_OFFSET = TC__BOOT_SECTOR_LOADER_LENGTH_OFFSET TC_BOOT_SECTOR_LOADER_CHECKSUM_OFFSET = TC__BOOT_SECTOR_LOADER_CHECKSUM_OFFSET TC_BOOT_SECTOR_CONFIG_OFFSET = TC__BOOT_SECTOR_CONFIG_OFFSET TC_BOOT_SECTOR_USER_CONFIG_OFFSET = TC__BOOT_SECTOR_USER_CONFIG_OFFSET TC_BOOT_LOADER_DECOMPRESSOR_START_SECTOR = TC__BOOT_LOADER_DECOMPRESSOR_START_SECTOR TC_BOOT_LOADER_DECOMPRESSOR_SECTOR_COUNT = TC__BOOT_LOADER_DECOMPRESSOR_SECTOR_COUNT TC_BOOT_LOADER_DECOMPRESSOR_MEMORY_SIZE = TC__BOOT_LOADER_DECOMPRESSOR_MEMORY_SIZE TC_BOOT_LOADER_COMPRESSED_BUFFER_OFFSET = TC__BOOT_LOADER_COMPRESSED_BUFFER_OFFSET TC_BOOT_LOADER_START_SECTOR = TC__BOOT_LOADER_START_SECTOR TC_MAX_BOOT_LOADER_SECT
/*
 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) 2013-2017 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 "Platform/Exception.h"
#include "Platform/SyncEvent.h"
#include "Platform/SystemException.h"

namespace VeraCrypt
{
	SyncEvent::SyncEvent ()
	{
		int status = pthread_cond_init (&SystemSyncEvent, nullptr);
		if (status != 0)
			throw SystemException (SRC_POS, status);

		Signaled = false;
		Initialized = true;
	}

	SyncEvent::~SyncEvent ()
	{
#ifdef DEBUG
		int status =
#endif
		pthread_cond_destroy (&SystemSyncEvent);

#ifdef DEBUG
		if (status != 0)
			SystemLog::WriteException (SystemException (SRC_POS, status));
#endif

		Initialized = false;
	}

	void SyncEvent::Signal ()
	{
		assert (Initialized);

		ScopeLock lock (EventMutex);

		Signaled = true;

		int status = pthread_cond_signal (&SystemSyncEvent);
		if (status != 0)
			throw SystemException (SRC_POS, status);
	}

	void SyncEvent::Wait ()
	{
		assert (Initialized);

		ScopeLock lock (EventMutex);

		while (!Signaled)
		{
			int status = pthread_cond_wait (&SystemSyncEvent, EventMutex.GetSystemHandle());
			if (status != 0)
				throw SystemException (SRC_POS, status);
		}

		Signaled = false;
	}
}