void VolumeHeader::Create (const BufferPtr &headerBuffer, VolumeHeaderCreationOptions &options)
{
if (options.DataKey.Size() != options.EA->GetKeySize() * 2 || options.Salt.Size() != GetSaltSize())
throw ParameterIncorrect (SRC_POS);
headerBuffer.Zero();
HeaderVersion = CurrentHeaderVersion;
RequiredMinProgramVersion = CurrentRequiredMinProgramVersion;
DataAreaKey.Zero();
DataAreaKey.CopyFrom (options.DataKey);
VolumeCreationTime = 0;
HiddenVolumeDataSize = (options.Type == VolumeType::Hidden ? options.VolumeDataSize : 0);
VolumeDataSize = options.VolumeDataSize;
EncryptedAreaStart = options.VolumeDataStart;
EncryptedAreaLength = options.VolumeDataSize;
SectorSize = options.SectorSize;
if (SectorSize < TC_MIN_VOLUME_SECTOR_SIZE
|| SectorSize > TC_MAX_VOLUME_SECTOR_SIZE
|| SectorSize % ENCRYPTION_DATA_UNIT_SIZE != 0)
{
throw ParameterIncorrect (SRC_POS);
}
EA = options.EA;
shared_ptr <EncryptionMode> mode (new EncryptionModeXTS ());
EA->SetMode (mode);
EncryptNew (headerBuffer, options.Salt, options.HeaderKey, options.Kdf);
}
void VolumeHeader::Serialize (const BufferPtr &header) const
{
if (header.Size() != EncryptedHeaderDataSize)
throw ParameterIncorrect (SRC_POS);
header.Zero();
header[0] = 'V';
header[1] = 'E';
header[2] = 'R';
header[3] = 'A';
size_t offset = 4;
header.GetRange (DataAreaKeyOffset, DataAreaKey.Size()).CopyFrom (DataAreaKey);
uint16 headerVersion = CurrentHeaderVersion;
SerializeEntry (headerVersion, header, offset);
SerializeEntry (RequiredMinProgramVersion, header, offset);
SerializeEntry (Crc32::ProcessBuffer (header.GetRange (DataAreaKeyOffset, DataKeyAreaMaxSize)), header, offset);
uint64 reserved64 = 0;
SerializeEntry (reserved64, header, offset);
SerializeEntry (reserved64, header, offset);
SerializeEntry (HiddenVolumeDataSize, header, offset);
SerializeEntry (VolumeDataSize, header, offset);
SerializeEntry (EncryptedAreaStart, header, offset);
SerializeEntry (EncryptedAreaLength, header, offset);
SerializeEntry (Flags, header, offset);
if (SectorSize < TC_MIN_VOLUME_SECTOR_SIZE
|| SectorSize > TC_MAX_VOLUME_SECTOR_SIZE
|| SectorSize % ENCRYPTION_DATA_UNIT_SIZE != 0)
{
throw ParameterIncorrect (SRC_POS);
}
SerializeEntry (SectorSize, header, offset);
offset = TC_HEADER_OFFSET_HEADER_CRC - TC_HEADER_OFFSET_MAGIC;
SerializeEntry (Crc32::ProcessBuffer (header.GetRange (0, TC_HEADER_OFFSET_HEADER_CRC - TC_HEADER_OFFSET_MAGIC)), header, offset);
}
