VeraCrypt
aboutsummaryrefslogtreecommitdiff
path: root/src/Volume/Volume.cpp
diff options
context:
space:
mode:
authorMounir IDRASSI <mounir.idrassi@idrix.fr>2014-05-31 16:44:53 (GMT)
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2014-11-08 22:18:59 (GMT)
commit7ffce028d04a6b13ef762e2b89c34b688e8ca59d (patch)
treeeefedb6e94de5b26fa963675969490c641c29077 /src/Volume/Volume.cpp
parent97011f179cfd3dcd12446ef4ccb6964c8e52c3db (diff)
downloadVeraCrypt-7ffce028d04a6b13ef762e2b89c34b688e8ca59d.zip
VeraCrypt-7ffce028d04a6b13ef762e2b89c34b688e8ca59d.tar.gz
Add TrueCrypt 7.1a MacOSX/Linux specific source files.
Diffstat (limited to 'src/Volume/Volume.cpp')
-rw-r--r--src/Volume/Volume.cpp388
1 files changed, 388 insertions, 0 deletions
diff --git a/src/Volume/Volume.cpp b/src/Volume/Volume.cpp
new file mode 100644
index 0000000..0acdbb2
--- /dev/null
+++ b/src/Volume/Volume.cpp
@@ -0,0 +1,388 @@
+/*
+ Copyright (c) 2008-2010 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_WINDOWS
+#include <errno.h>
+#endif
+#include "EncryptionModeLRW.h"
+#include "EncryptionModeXTS.h"
+#include "Volume.h"
+#include "VolumeHeader.h"
+#include "VolumeLayout.h"
+#include "Common/Crypto.h"
+
+namespace TrueCrypt
+{
+ Volume::Volume ()
+ : HiddenVolumeProtectionTriggered (false),
+ SystemEncryption (false),
+ VolumeDataSize (0),
+ TopWriteOffset (0),
+ TotalDataRead (0),
+ TotalDataWritten (0)
+ {
+ }
+
+ Volume::~Volume ()
+ {
+ }
+
+ void Volume::CheckProtectedRange (uint64 writeHostOffset, uint64 writeLength)
+ {
+ uint64 writeHostEndOffset = writeHostOffset + writeLength - 1;
+
+ if ((writeHostOffset < ProtectedRangeStart) ? (writeHostEndOffset >= ProtectedRangeStart) : (writeHostOffset <= ProtectedRangeEnd - 1))
+ {
+ HiddenVolumeProtectionTriggered = true;
+ throw VolumeProtected (SRC_POS);
+ }
+ }
+
+ void Volume::Close ()
+ {
+ if (VolumeFile.get() == nullptr)
+ throw NotInitialized (SRC_POS);
+
+ VolumeFile.reset();
+ }
+
+ shared_ptr <EncryptionAlgorithm> Volume::GetEncryptionAlgorithm () const
+ {
+ if_debug (ValidateState ());
+ return EA;
+ }
+
+ shared_ptr <EncryptionMode> Volume::GetEncryptionMode () const
+ {
+ if_debug (ValidateState ());
+ return EA->GetMode();
+ }
+
+ void Volume::Open (const VolumePath &volumePath, bool preserveTimestamps, shared_ptr <VolumePassword> password, shared_ptr <KeyfileList> keyfiles, VolumeProtection::Enum protection, shared_ptr <VolumePassword> protectionPassword, shared_ptr <KeyfileList> protectionKeyfiles, bool sharedAccessAllowed, VolumeType::Enum volumeType, bool useBackupHeaders, bool partitionInSystemEncryptionScope)
+ {
+ make_shared_auto (File, file);
+
+ File::FileOpenFlags flags = (preserveTimestamps ? File::PreserveTimestamps : File::FlagsNone);
+
+ try
+ {
+ if (protection == VolumeProtection::ReadOnly)
+ file->Open (volumePath, File::OpenRead, File::ShareRead, flags);
+ else
+ file->Open (volumePath, File::OpenReadWrite, File::ShareNone, flags);
+ }
+ catch (SystemException &e)
+ {
+ if (e.GetErrorCode() ==
+#ifdef TC_WINDOWS
+ ERROR_SHARING_VIOLATION)
+#else
+ EAGAIN)
+#endif
+ {
+ if (!sharedAccessAllowed)
+ throw VolumeHostInUse (SRC_POS);
+
+ file->Open (volumePath, protection == VolumeProtection::ReadOnly ? File::OpenRead : File::OpenReadWrite, File::ShareReadWriteIgnoreLock, flags);
+ }
+ else
+ throw;
+ }
+
+ return Open (file, password, keyfiles, protection, protectionPassword, protectionKeyfiles, volumeType, useBackupHeaders, partitionInSystemEncryptionScope);
+ }
+
+ void Volume::Open (shared_ptr <File> volumeFile, shared_ptr <VolumePassword> password, shared_ptr <KeyfileList> keyfiles, VolumeProtection::Enum protection, shared_ptr <VolumePassword> protectionPassword, shared_ptr <KeyfileList> protectionKeyfiles, VolumeType::Enum volumeType, bool useBackupHeaders, bool partitionInSystemEncryptionScope)
+ {
+ if (!volumeFile)
+ throw ParameterIncorrect (SRC_POS);
+
+ Protection = protection;
+ VolumeFile = volumeFile;
+ SystemEncryption = partitionInSystemEncryptionScope;
+
+ try
+ {
+ VolumeHostSize = VolumeFile->Length();
+ shared_ptr <VolumePassword> passwordKey = Keyfile::ApplyListToPassword (keyfiles, password);
+
+ bool skipLayoutV1Normal = false;
+
+ bool deviceHosted = GetPath().IsDevice();
+ size_t hostDeviceSectorSize = 0;
+ if (deviceHosted)
+ hostDeviceSectorSize = volumeFile->GetDeviceSectorSize();
+
+ // Test volume layouts
+ foreach (shared_ptr <VolumeLayout> layout, VolumeLayout::GetAvailableLayouts (volumeType))
+ {
+ if (skipLayoutV1Normal && typeid (*layout) == typeid (VolumeLayoutV1Normal))
+ {
+ // Skip VolumeLayoutV1Normal as it shares header location with VolumeLayoutV2Normal
+ continue;
+ }
+
+ if (useBackupHeaders && !layout->HasBackupHeader())
+ continue;
+
+ if (typeid (*layout) == typeid (VolumeLayoutV1Hidden)
+ && deviceHosted
+ && hostDeviceSectorSize != TC_SECTOR_SIZE_LEGACY)
+ {
+ continue;
+ }
+
+ SecureBuffer headerBuffer (layout->GetHeaderSize());
+
+ if (layout->HasDriveHeader())
+ {
+ if (!partitionInSystemEncryptionScope)
+ continue;
+
+ if (!GetPath().IsDevice())
+ throw PartitionDeviceRequired (SRC_POS);
+
+ File driveDevice;
+ driveDevice.Open (DevicePath (wstring (GetPath())).ToHostDriveOfPartition());
+
+ int headerOffset = layout->GetHeaderOffset();
+
+ if (headerOffset >= 0)
+ driveDevice.SeekAt (headerOffset);
+ else
+ driveDevice.SeekEnd (headerOffset);
+
+ if (driveDevice.Read (headerBuffer) != layout->GetHeaderSize())
+ continue;
+ }
+ else
+ {
+ if (partitionInSystemEncryptionScope)
+ continue;
+
+ int headerOffset = useBackupHeaders ? layout->GetBackupHeaderOffset() : layout->GetHeaderOffset();
+
+ if (headerOffset >= 0)
+ VolumeFile->SeekAt (headerOffset);
+ else
+ VolumeFile->SeekEnd (headerOffset);
+
+ if (VolumeFile->Read (headerBuffer) != layout->GetHeaderSize())
+ continue;
+ }
+
+ EncryptionAlgorithmList layoutEncryptionAlgorithms = layout->GetSupportedEncryptionAlgorithms();
+ EncryptionModeList layoutEncryptionModes = layout->GetSupportedEncryptionModes();
+
+ if (typeid (*layout) == typeid (VolumeLayoutV2Normal))
+ {
+ skipLayoutV1Normal = true;
+
+ // Test all algorithms and modes of VolumeLayoutV1Normal as it shares header location with VolumeLayoutV2Normal
+ layoutEncryptionAlgorithms = EncryptionAlgorithm::GetAvailableAlgorithms();
+ layoutEncryptionModes = EncryptionMode::GetAvailableModes();
+ }
+
+ shared_ptr <VolumeHeader> header = layout->GetHeader();
+
+ if (header->Decrypt (headerBuffer, *passwordKey, layout->GetSupportedKeyDerivationFunctions(), layoutEncryptionAlgorithms, layoutEncryptionModes))
+ {
+ // Header decrypted
+
+ if (typeid (*layout) == typeid (VolumeLayoutV2Normal) && header->GetRequiredMinProgramVersion() < 0x600)
+ {
+ // VolumeLayoutV1Normal has been opened as VolumeLayoutV2Normal
+ layout.reset (new VolumeLayoutV1Normal);
+ header->SetSize (layout->GetHeaderSize());
+ layout->SetHeader (header);
+ }
+
+ Type = layout->GetType();
+ SectorSize = header->GetSectorSize();
+
+ VolumeDataOffset = layout->GetDataOffset (VolumeHostSize);
+ VolumeDataSize = layout->GetDataSize (VolumeHostSize);
+
+ Header = header;
+ Layout = layout;
+ EA = header->GetEncryptionAlgorithm();
+ EncryptionMode &mode = *EA->GetMode();
+
+ if (layout->HasDriveHeader())
+ {
+ if (header->GetEncryptedAreaLength() != header->GetVolumeDataSize())
+ throw VolumeEncryptionNotCompleted (SRC_POS);
+
+ uint64 partitionStartOffset = VolumeFile->GetPartitionDeviceStartOffset();
+
+ if (partitionStartOffset < header->GetEncryptedAreaStart()
+ || partitionStartOffset >= header->GetEncryptedAreaStart() + header->GetEncryptedAreaLength())
+ throw PasswordIncorrect (SRC_POS);
+
+ mode.SetSectorOffset (partitionStartOffset / ENCRYPTION_DATA_UNIT_SIZE);
+ }
+ else if (typeid (mode) == typeid (EncryptionModeLRW))
+ {
+ mode.SetSectorOffset (VolumeDataOffset / SectorSize);
+ }
+
+ // Volume protection
+ if (Protection == VolumeProtection::HiddenVolumeReadOnly)
+ {
+ if (Type == VolumeType::Hidden)
+ throw PasswordIncorrect (SRC_POS);
+ else
+ {
+ try
+ {
+ Volume protectedVolume;
+
+ protectedVolume.Open (VolumeFile,
+ protectionPassword, protectionKeyfiles,
+ VolumeProtection::ReadOnly,
+ shared_ptr <VolumePassword> (), shared_ptr <KeyfileList> (),
+ VolumeType::Hidden,
+ useBackupHeaders);
+
+ if (protectedVolume.GetType() != VolumeType::Hidden)
+ ParameterIncorrect (SRC_POS);
+
+ ProtectedRangeStart = protectedVolume.VolumeDataOffset;
+ ProtectedRangeEnd = protectedVolume.VolumeDataOffset + protectedVolume.VolumeDataSize;
+
+ if (typeid (*protectedVolume.Layout) == typeid (VolumeLayoutV1Hidden))
+ ProtectedRangeEnd += protectedVolume.Layout->GetHeaderSize();
+ }
+ catch (PasswordException&)
+ {
+ if (protectionKeyfiles && !protectionKeyfiles->empty())
+ throw ProtectionPasswordKeyfilesIncorrect (SRC_POS);
+ throw ProtectionPasswordIncorrect (SRC_POS);
+ }
+ }
+ }
+ return;
+ }
+ }
+
+ if (partitionInSystemEncryptionScope)
+ throw PasswordOrKeyboardLayoutIncorrect (SRC_POS);
+
+ if (!partitionInSystemEncryptionScope && GetPath().IsDevice())
+ {
+ // Check if the device contains TrueCrypt Boot Loader
+ try
+ {
+ File driveDevice;
+ driveDevice.Open (DevicePath (wstring (GetPath())).ToHostDriveOfPartition());
+
+ Buffer mbr (VolumeFile->GetDeviceSectorSize());
+ driveDevice.ReadAt (mbr, 0);
+
+ // Search for the string "TrueCrypt"
+ size_t nameLen = strlen (TC_APP_NAME);
+ for (size_t i = 0; i < mbr.Size() - nameLen; ++i)
+ {
+ if (memcmp (mbr.Ptr() + i, TC_APP_NAME, nameLen) == 0)
+ throw PasswordOrMountOptionsIncorrect (SRC_POS);
+ }
+ }
+ catch (PasswordOrMountOptionsIncorrect&) { throw; }
+ catch (...) { }
+ }
+
+ if (keyfiles && !keyfiles->empty())
+ throw PasswordKeyfilesIncorrect (SRC_POS);
+ throw PasswordIncorrect (SRC_POS);
+ }
+ catch (...)
+ {
+ Close();
+ throw;
+ }
+ }
+
+ void Volume::ReadSectors (const BufferPtr &buffer, uint64 byteOffset)
+ {
+ if_debug (ValidateState ());
+
+ uint64 length = buffer.Size();
+ uint64 hostOffset = VolumeDataOffset + byteOffset;
+
+ if (length % SectorSize != 0 || byteOffset % SectorSize != 0)
+ throw ParameterIncorrect (SRC_POS);
+
+ if (VolumeFile->ReadAt (buffer, hostOffset) != length)
+ throw MissingVolumeData (SRC_POS);
+
+ EA->DecryptSectors (buffer, hostOffset / SectorSize, length / SectorSize, SectorSize);
+
+ TotalDataRead += length;
+ }
+
+ void Volume::ReEncryptHeader (bool backupHeader, const ConstBufferPtr &newSalt, const ConstBufferPtr &newHeaderKey, shared_ptr <Pkcs5Kdf> newPkcs5Kdf)
+ {
+ if_debug (ValidateState ());
+
+ if (Protection == VolumeProtection::ReadOnly)
+ throw VolumeReadOnly (SRC_POS);
+
+ SecureBuffer newHeaderBuffer (Layout->GetHeaderSize());
+
+ Header->EncryptNew (newHeaderBuffer, newSalt, newHeaderKey, newPkcs5Kdf);
+
+ int headerOffset = backupHeader ? Layout->GetBackupHeaderOffset() : Layout->GetHeaderOffset();
+
+ if (headerOffset >= 0)
+ VolumeFile->SeekAt (headerOffset);
+ else
+ VolumeFile->SeekEnd (headerOffset);
+
+ VolumeFile->Write (newHeaderBuffer);
+ }
+
+ void Volume::ValidateState () const
+ {
+ if (VolumeFile.get() == nullptr)
+ throw NotInitialized (SRC_POS);
+ }
+
+ void Volume::WriteSectors (const ConstBufferPtr &buffer, uint64 byteOffset)
+ {
+ if_debug (ValidateState ());
+
+ uint64 length = buffer.Size();
+ uint64 hostOffset = VolumeDataOffset + byteOffset;
+
+ if (length % SectorSize != 0
+ || byteOffset % SectorSize != 0
+ || byteOffset + length > VolumeDataSize)
+ throw ParameterIncorrect (SRC_POS);
+
+ if (Protection == VolumeProtection::ReadOnly)
+ throw VolumeReadOnly (SRC_POS);
+
+ if (HiddenVolumeProtectionTriggered)
+ throw VolumeProtected (SRC_POS);
+
+ if (Protection == VolumeProtection::HiddenVolumeReadOnly)
+ CheckProtectedRange (hostOffset, length);
+
+ SecureBuffer encBuf (buffer.Size());
+ encBuf.CopyFrom (buffer);
+
+ EA->EncryptSectors (encBuf, hostOffset / SectorSize, length / SectorSize, SectorSize);
+ VolumeFile->WriteAt (encBuf, hostOffset);
+
+ TotalDataWritten += length;
+
+ uint64 writeEndOffset = byteOffset + buffer.Size();
+ if (writeEndOffset > TopWriteOffset)
+ TopWriteOffset = writeEndOffset;
+ }
+}