public byte[] GetBytes(int bytesPerIndexRecord, bool applyUsaProtection)
{
int strideCount = bytesPerIndexRecord / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, UpdateSequenceArrayOffset, updateSequenceArraySize);
int updateSequenceArrayPaddedLength = (int)Math.Ceiling((double)(updateSequenceArraySize * 2) / 8) * 8;
m_indexHeader.EntriesOffset = (uint)(IndexHeader.Length + updateSequenceArrayPaddedLength);
m_indexHeader.TotalLength = (uint)(IndexHeader.Length + updateSequenceArrayPaddedLength + IndexEntry.GetLength(IndexEntries));
m_indexHeader.AllocatedLength = (uint)(bytesPerIndexRecord - IndexHeaderOffset);
int length = applyUsaProtection ? bytesPerIndexRecord : GetNumberOfBytesInUse(bytesPerIndexRecord);
byte[] buffer = new byte[length];
multiSectorHeader.WriteBytes(buffer, 0x00);
LittleEndianWriter.WriteUInt64(buffer, 0x08, LogFileSequenceNumber);
LittleEndianWriter.WriteUInt64(buffer, 0x10, (ulong)RecordVBN);
m_indexHeader.WriteBytes(buffer, 0x18);
LittleEndianWriter.WriteUInt16(buffer, UpdateSequenceArrayOffset, UpdateSequenceNumber);
IndexEntry.WriteIndexEntries(buffer, UpdateSequenceArrayOffset + updateSequenceArrayPaddedLength, IndexEntries);
if (applyUsaProtection)
{
MultiSectorHelper.ApplyUsaProtection(buffer, 0);
}
return(buffer);
}
public byte[] GetBytes(int bytesPerIndexRecord)
{
int strideCount = bytesPerIndexRecord / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, UpdateSequenceArrayOffset, updateSequenceArraySize);
int updateSequenceArrayPaddedLength = (int)Math.Ceiling((double)(updateSequenceArraySize * 2) / 8) * 8;
m_indexHeader.EntriesOffset = (uint)(IndexHeader.Length + updateSequenceArrayPaddedLength);
m_indexHeader.TotalLength = (uint)(IndexHeader.Length + updateSequenceArrayPaddedLength + IndexEntry.GetLength(IndexEntries));
m_indexHeader.AllocatedLength = (uint)(bytesPerIndexRecord - IndexHeaderOffset);
byte[] buffer = new byte[bytesPerIndexRecord];
multiSectorHeader.WriteBytes(buffer, 0x00);
LittleEndianWriter.WriteUInt64(buffer, 0x08, LogFileSequenceNumber);
LittleEndianWriter.WriteUInt64(buffer, 0x10, (ulong)RecordVBN);
m_indexHeader.WriteBytes(buffer, 0x18);
IndexEntry.WriteIndexEntries(buffer, UpdateSequenceArrayOffset + updateSequenceArrayPaddedLength, IndexEntries);
// Write UpdateSequenceNumber and UpdateSequenceReplacementData
List <byte[]> updateSequenceReplacementData = MultiSectorHelper.EncodeSegmentBuffer(buffer, 0, bytesPerIndexRecord, UpdateSequenceNumber);
MultiSectorHelper.WriteUpdateSequenceArray(buffer, UpdateSequenceArrayOffset, updateSequenceArraySize, UpdateSequenceNumber, updateSequenceReplacementData);
return(buffer);
}
/// <remarks>
/// The USN will be written at the end of each 512-byte stride, even if the device has more (or less) than 512 bytes per sector.
/// https://docs.microsoft.com/en-us/windows/desktop/DevNotes/multi-sector-header
/// </remarks>
public static void RevertUsaProtection(byte[] buffer, int offset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
int position = offset + multiSectorHeader.UpdateSequenceArrayOffset;
if (position > buffer.Length - 2)
{
throw new InvalidDataException("UpdateSequenceArrayOffset is out of range");
}
uint updateSequenceNumber = LittleEndianReader.ReadUInt16(buffer, ref position);
// First do validation check - make sure the USN matches on all sectors)
for (int index = 0; index < multiSectorHeader.UpdateSequenceArraySize - 1; ++index)
{
if (updateSequenceNumber != LittleEndianConverter.ToUInt16(buffer, offset + (BytesPerStride * (index + 1)) - 2))
{
throw new InvalidDataException("Corrupt multi-sector transfer, USN does not match MultiSectorHeader");
}
}
for (int index = 0; index < multiSectorHeader.UpdateSequenceArraySize - 1; index++)
{
byte[] endOfSectorBytes = ByteReader.ReadBytes(buffer, ref position, 2);
ByteWriter.WriteBytes(buffer, offset + (BytesPerStride * (index + 1)) - 2, endOfSectorBytes);
}
}
/// <param name="segmentLength">This refers to the maximum length of FileRecord as defined in the Volume's BootRecord</param>
public byte[] GetBytes(int bytesPerFileRecordSegment, ushort minorNTFSVersion)
{
int strideCount = bytesPerFileRecordSegment / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
ushort updateSequenceArrayOffset;
if (minorNTFSVersion == 0)
{
updateSequenceArrayOffset = NTFS30UpdateSequenceArrayOffset;
}
else
{
updateSequenceArrayOffset = NTFS31UpdateSequenceArrayOffset;
}
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, updateSequenceArrayOffset, updateSequenceArraySize);
ushort firstAttributeOffset = GetFirstAttributeOffset(bytesPerFileRecordSegment, minorNTFSVersion);
byte[] buffer = new byte[bytesPerFileRecordSegment];
multiSectorHeader.WriteBytes(buffer, 0x00);
LittleEndianWriter.WriteUInt64(buffer, 0x08, LogFileSequenceNumber);
LittleEndianWriter.WriteUInt16(buffer, 0x10, m_sequenceNumber);
LittleEndianWriter.WriteUInt16(buffer, 0x12, ReferenceCount);
LittleEndianWriter.WriteUInt16(buffer, 0x14, firstAttributeOffset);
LittleEndianWriter.WriteUInt16(buffer, 0x16, (ushort)m_flags);
LittleEndianWriter.WriteInt32(buffer, 0x1C, bytesPerFileRecordSegment);
m_baseFileRecordSegment.WriteBytes(buffer, 0x20);
LittleEndianWriter.WriteUInt16(buffer, 0x28, NextAttributeInstance);
if (minorNTFSVersion == 1)
{
LittleEndianWriter.WriteUInt32(buffer, 0x2C, (uint)m_segmentNumber);
}
// write attributes
int position = firstAttributeOffset;
foreach (AttributeRecord attribute in m_immediateAttributes)
{
byte[] attributeBytes = attribute.GetBytes();
ByteWriter.WriteBytes(buffer, position, attributeBytes);
position += attributeBytes.Length;
}
byte[] marker = GetEndMarker();
ByteWriter.WriteBytes(buffer, position, marker);
position += marker.Length;
position += 4; // record (length) is aligned to 8-byte boundary
uint segmentLength = (uint)position;
LittleEndianWriter.WriteUInt32(buffer, 0x18, segmentLength);
// Write UpdateSequenceNumber and UpdateSequenceReplacementData
List <byte[]> updateSequenceReplacementData = MultiSectorHelper.EncodeSegmentBuffer(buffer, 0, bytesPerFileRecordSegment, UpdateSequenceNumber);
MultiSectorHelper.WriteUpdateSequenceArray(buffer, updateSequenceArrayOffset, updateSequenceArraySize, UpdateSequenceNumber, updateSequenceReplacementData);
return(buffer);
}
public byte[] GetBytes(int bytesPerSystemPage, bool applyUsaProtection)
{
m_systemPageSize = (uint)bytesPerSystemPage;
int strideCount = bytesPerSystemPage / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, UpdateSequenceArrayOffset, updateSequenceArraySize);
int restartOffset = (int)Math.Ceiling((double)(UpdateSequenceArrayOffset + updateSequenceArraySize * 2) / 8) * 8;
byte[] buffer = new byte[bytesPerSystemPage];
multiSectorHeader.WriteBytes(buffer, 0);
LittleEndianWriter.WriteUInt64(buffer, 0x08, ChkDskLsn);
LittleEndianWriter.WriteUInt32(buffer, 0x10, m_systemPageSize);
LittleEndianWriter.WriteUInt32(buffer, 0x14, LogPageSize);
LittleEndianWriter.WriteUInt16(buffer, 0x18, (ushort)restartOffset);
LittleEndianWriter.WriteInt16(buffer, 0x1A, MinorVersion);
LittleEndianWriter.WriteInt16(buffer, 0x1C, MajorVersion);
LittleEndianWriter.WriteUInt16(buffer, UpdateSequenceArrayOffset, UpdateSequenceNumber);
RestartArea.WriteBytes(buffer, restartOffset);
if (applyUsaProtection)
{
MultiSectorHelper.ApplyUsaProtection(buffer, 0);
}
return(buffer);
}
public static void ApplyUsaProtection(byte[] buffer, int offset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
int position = offset + multiSectorHeader.UpdateSequenceArrayOffset;
ushort updateSequenceNumber = LittleEndianReader.ReadUInt16(buffer, ref position);
for (int index = 0; index < multiSectorHeader.UpdateSequenceArraySize - 1; index++)
{
// Read in the bytes that are replaced by the USN
byte[] endOfSectorBytes = ByteReader.ReadBytes(buffer, offset + (BytesPerStride * (index + 1)) - 2, 2);
// Relocate the bytes that are replaced by the USN
ByteWriter.WriteBytes(buffer, ref position, endOfSectorBytes);
// Write the USN
LittleEndianWriter.WriteUInt16(buffer, offset + (BytesPerStride * (index + 1)) - 2, updateSequenceNumber);
}
}
public IndexRecord(byte[] buffer, int offset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
if (multiSectorHeader.Signature != ValidSignature)
{
throw new InvalidDataException("Invalid INDX record signature");
}
LogFileSequenceNumber = LittleEndianConverter.ToUInt64(buffer, offset + 0x08);
RecordVBN = (long)LittleEndianConverter.ToUInt64(buffer, offset + 0x10);
m_indexHeader = new IndexHeader(buffer, offset + 0x18);
UpdateSequenceNumber = LittleEndianConverter.ToUInt16(buffer, offset + multiSectorHeader.UpdateSequenceArrayOffset);
int entriesOffset = 0x18 + (int)m_indexHeader.EntriesOffset;
IndexEntries = IndexEntry.ReadIndexEntries(buffer, entriesOffset);
}
public FileRecordSegment(byte[] buffer, int offset, long segmentNumber)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
if (multiSectorHeader.Signature != ValidSignature)
{
throw new InvalidDataException("Invalid FILE record signature");
}
LogFileSequenceNumber = LittleEndianConverter.ToUInt64(buffer, offset + 0x08);
m_sequenceNumber = LittleEndianConverter.ToUInt16(buffer, offset + 0x10);
ReferenceCount = LittleEndianConverter.ToUInt16(buffer, offset + 0x12);
ushort firstAttributeOffset = LittleEndianConverter.ToUInt16(buffer, offset + 0x14);
m_flags = (FileRecordFlags)LittleEndianConverter.ToUInt16(buffer, offset + 0x16);
uint segmentLength = LittleEndianConverter.ToUInt32(buffer, offset + 0x18);
uint segmentAllocatedLength = LittleEndianConverter.ToUInt32(buffer, offset + 0x1C);
m_baseFileRecordSegment = new MftSegmentReference(buffer, offset + 0x20);
NextAttributeInstance = LittleEndianConverter.ToUInt16(buffer, offset + 0x28);
// 2 bytes padding
m_segmentNumberOnDisk = LittleEndianConverter.ToUInt32(buffer, offset + 0x2C);
UpdateSequenceNumber = LittleEndianConverter.ToUInt16(buffer, offset + multiSectorHeader.UpdateSequenceArrayOffset);
if (firstAttributeOffset % 8 > 0)
{
throw new InvalidDataException("Corrupt file record segment, first attribute not aligned to 8-byte boundary");
}
// Read attributes
int position = offset + firstAttributeOffset;
while (!IsEndMarker(buffer, position))
{
AttributeRecord attribute = AttributeRecord.FromBytes(buffer, position);
m_immediateAttributes.Add(attribute);
position += (int)attribute.RecordLengthOnDisk;
if (position > buffer.Length)
{
throw new InvalidDataException("Invalid attribute length");
}
}
m_segmentNumber = segmentNumber;
}
public LfsRestartPage(byte[] buffer, int offset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
if (multiSectorHeader.Signature != ValidSignature && multiSectorHeader.Signature != ModifiedSignature)
{
throw new InvalidDataException("Invalid RSTR record signature");
}
ChkDskLsn = LittleEndianConverter.ToUInt64(buffer, offset + 0x08);
m_systemPageSize = LittleEndianConverter.ToUInt32(buffer, offset + 0x10);
LogPageSize = LittleEndianConverter.ToUInt32(buffer, offset + 0x14);
ushort restartOffset = LittleEndianConverter.ToUInt16(buffer, offset + 0x18);
MinorVersion = LittleEndianConverter.ToInt16(buffer, offset + 0x1A);
MajorVersion = LittleEndianConverter.ToInt16(buffer, offset + 0x1C);
UpdateSequenceNumber = LittleEndianConverter.ToUInt16(buffer, offset + multiSectorHeader.UpdateSequenceArrayOffset);
RestartArea = new LfsRestartArea(buffer, offset + restartOffset);
}
public LfsRecordPage(byte[] pageBytes, int dataOffset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(pageBytes, 0x00);
if (multiSectorHeader.Signature != ValidSignature)
{
throw new InvalidDataException("Invalid RCRD record signature");
}
LastLsnOrFileOffset = LittleEndianConverter.ToUInt64(pageBytes, 0x08);
Flags = (LfsRecordPageFlags)LittleEndianConverter.ToUInt32(pageBytes, 0x10);
PageCount = LittleEndianConverter.ToUInt16(pageBytes, 0x14);
PagePosition = LittleEndianConverter.ToUInt16(pageBytes, 0x16);
NextRecordOffset = LittleEndianConverter.ToUInt16(pageBytes, 0x18);
LastEndLsn = LittleEndianConverter.ToUInt64(pageBytes, 0x20);
UpdateSequenceNumber = LittleEndianConverter.ToUInt16(pageBytes, multiSectorHeader.UpdateSequenceArrayOffset);
Data = ByteReader.ReadBytes(pageBytes, dataOffset, pageBytes.Length - dataOffset);
m_dataOffset = dataOffset;
}
public LogRestartPage(byte[] buffer, int offset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
if (multiSectorHeader.Signature != ValidSignature)
{
throw new InvalidDataException("Invalid RSTR record signature");
}
ChkDskLsn = LittleEndianConverter.ToUInt64(buffer, offset + 0x08);
m_systemPageSize = LittleEndianConverter.ToUInt32(buffer, offset + 0x10);
LogPageSize = LittleEndianConverter.ToUInt32(buffer, offset + 0x14);
ushort restartOffset = LittleEndianConverter.ToUInt16(buffer, offset + 0x18);
MinorVersion = LittleEndianConverter.ToInt16(buffer, offset + 0x1A);
MajorVersion = LittleEndianConverter.ToInt16(buffer, offset + 0x1C);
int position = offset + multiSectorHeader.UpdateSequenceArrayOffset;
List <byte[]> updateSequenceReplacementData = MultiSectorHelper.ReadUpdateSequenceArray(buffer, position, multiSectorHeader.UpdateSequenceArraySize, out UpdateSequenceNumber);
MultiSectorHelper.DecodeSegmentBuffer(buffer, offset, UpdateSequenceNumber, updateSequenceReplacementData);
LogRestartArea = new LogRestartArea(buffer, offset + restartOffset);
}
public IndexRecord(byte[] buffer, int offset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
if (multiSectorHeader.Signature != ValidSignature)
{
throw new InvalidDataException("Invalid INDX record signature");
}
LogFileSequenceNumber = LittleEndianConverter.ToUInt64(buffer, offset + 0x08);
RecordVBN = (long)LittleEndianConverter.ToUInt64(buffer, offset + 0x10);
m_indexHeader = new IndexHeader(buffer, offset + 0x18);
int position = offset + multiSectorHeader.UpdateSequenceArrayOffset;
List <byte[]> updateSequenceReplacementData = MultiSectorHelper.ReadUpdateSequenceArray(buffer, position, multiSectorHeader.UpdateSequenceArraySize, out UpdateSequenceNumber);
MultiSectorHelper.DecodeSegmentBuffer(buffer, offset, UpdateSequenceNumber, updateSequenceReplacementData);
int entriesOffset = 0x18 + (int)m_indexHeader.EntriesOffset;
IndexEntries = IndexEntry.ReadIndexEntries(buffer, entriesOffset);
}
public LogRecordPage(byte[] buffer, int offset, int dataOffset)
{
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(buffer, offset + 0x00);
if (multiSectorHeader.Signature != ValidSignature)
{
throw new InvalidDataException("Invalid RCRD record signature");
}
LastLsnOrFileOffset = LittleEndianConverter.ToUInt64(buffer, offset + 0x08);
Flags = (LogRecordPageFlags)LittleEndianConverter.ToUInt32(buffer, offset + 0x10);
PageCount = LittleEndianConverter.ToUInt16(buffer, offset + 0x14);
PagePosition = LittleEndianConverter.ToUInt16(buffer, offset + 0x16);
ushort nextRecordOffset = LittleEndianConverter.ToUInt16(buffer, offset + 0x18);
LastEndLsn = LittleEndianConverter.ToUInt64(buffer, offset + 0x20);
int position = offset + multiSectorHeader.UpdateSequenceArrayOffset;
List <byte[]> updateSequenceReplacementData = MultiSectorHelper.ReadUpdateSequenceArray(buffer, position, multiSectorHeader.UpdateSequenceArraySize, out UpdateSequenceNumber);
MultiSectorHelper.DecodeSegmentBuffer(buffer, offset, UpdateSequenceNumber, updateSequenceReplacementData);
Data = ByteReader.ReadBytes(buffer, offset + dataOffset, (int)(nextRecordOffset - dataOffset));
}
public byte[] GetBytes(int bytesPerLogPage, int dataOffset)
{
int strideCount = bytesPerLogPage / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, UpdateSequenceArrayOffset, updateSequenceArraySize);
ushort nextRecordOffset = (ushort)(dataOffset + Data.Length);
byte[] buffer = new byte[bytesPerLogPage];
multiSectorHeader.WriteBytes(buffer, 0);
LittleEndianWriter.WriteUInt64(buffer, 0x08, LastLsnOrFileOffset);
LittleEndianWriter.WriteUInt32(buffer, 0x10, (uint)Flags);
LittleEndianWriter.WriteUInt16(buffer, 0x14, PageCount);
LittleEndianWriter.WriteUInt16(buffer, 0x16, PagePosition);
LittleEndianWriter.WriteUInt16(buffer, 0x18, nextRecordOffset);
LittleEndianWriter.WriteUInt64(buffer, 0x20, LastEndLsn);
ByteWriter.WriteBytes(buffer, dataOffset, Data);
// Write UpdateSequenceNumber and UpdateSequenceReplacementData
List <byte[]> updateSequenceReplacementData = MultiSectorHelper.EncodeSegmentBuffer(buffer, 0, bytesPerLogPage, UpdateSequenceNumber);
MultiSectorHelper.WriteUpdateSequenceArray(buffer, UpdateSequenceArrayOffset, updateSequenceArraySize, UpdateSequenceNumber, updateSequenceReplacementData);
return(buffer);
}
public byte[] GetBytes(int bytesPerLogPage, bool applyUsaProtection)
{
int strideCount = bytesPerLogPage / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, UpdateSequenceArrayOffset, updateSequenceArraySize);
byte[] buffer = new byte[bytesPerLogPage];
multiSectorHeader.WriteBytes(buffer, 0);
LittleEndianWriter.WriteUInt64(buffer, 0x08, LastLsnOrFileOffset);
LittleEndianWriter.WriteUInt32(buffer, 0x10, (uint)Flags);
LittleEndianWriter.WriteUInt16(buffer, 0x14, PageCount);
LittleEndianWriter.WriteUInt16(buffer, 0x16, PagePosition);
LittleEndianWriter.WriteUInt16(buffer, 0x18, NextRecordOffset);
LittleEndianWriter.WriteUInt64(buffer, 0x20, LastEndLsn);
LittleEndianWriter.WriteUInt16(buffer, UpdateSequenceArrayOffset, UpdateSequenceNumber);
ByteWriter.WriteBytes(buffer, m_dataOffset, Data);
if (applyUsaProtection)
{
MultiSectorHelper.ApplyUsaProtection(buffer, 0);
}
return(buffer);
}
public byte[] GetBytes(int bytesPerSystemPage)
{
m_systemPageSize = (uint)bytesPerSystemPage;
int strideCount = bytesPerSystemPage / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, UpdateSequenceArrayOffset, updateSequenceArraySize);
int restartOffset = (int)Math.Ceiling((double)(UpdateSequenceArrayOffset + updateSequenceArraySize * 2) / 8) * 8;
byte[] buffer = new byte[bytesPerSystemPage];
multiSectorHeader.WriteBytes(buffer, 0);
LittleEndianWriter.WriteUInt64(buffer, 0x08, ChkDskLsn);
LittleEndianWriter.WriteUInt32(buffer, 0x10, m_systemPageSize);
LittleEndianWriter.WriteUInt32(buffer, 0x14, LogPageSize);
LittleEndianWriter.WriteUInt16(buffer, 0x18, (ushort)restartOffset);
LittleEndianWriter.WriteInt16(buffer, 0x1A, MinorVersion);
LittleEndianWriter.WriteInt16(buffer, 0x1C, MajorVersion);
LogRestartArea.WriteBytes(buffer, restartOffset);
// Write UpdateSequenceNumber and UpdateSequenceReplacementData
List <byte[]> updateSequenceReplacementData = MultiSectorHelper.EncodeSegmentBuffer(buffer, 0, bytesPerSystemPage, UpdateSequenceNumber);
MultiSectorHelper.WriteUpdateSequenceArray(buffer, UpdateSequenceArrayOffset, updateSequenceArraySize, UpdateSequenceNumber, updateSequenceReplacementData);
return(buffer);
}
public byte[] GetBytes(int bytesPerFileRecordSegment, ushort minorNTFSVersion, bool applyUsaProtection)
{
int strideCount = bytesPerFileRecordSegment / MultiSectorHelper.BytesPerStride;
ushort updateSequenceArraySize = (ushort)(1 + strideCount);
ushort updateSequenceArrayOffset;
if (minorNTFSVersion == 0)
{
updateSequenceArrayOffset = NTFS30UpdateSequenceArrayOffset;
}
else
{
updateSequenceArrayOffset = NTFS31UpdateSequenceArrayOffset;
}
MultiSectorHeader multiSectorHeader = new MultiSectorHeader(ValidSignature, updateSequenceArrayOffset, updateSequenceArraySize);
ushort firstAttributeOffset = GetFirstAttributeOffset(bytesPerFileRecordSegment, minorNTFSVersion);
int length = applyUsaProtection ? bytesPerFileRecordSegment : GetNumberOfBytesInUse(bytesPerFileRecordSegment, minorNTFSVersion);
byte[] buffer = new byte[length];
multiSectorHeader.WriteBytes(buffer, 0x00);
LittleEndianWriter.WriteUInt64(buffer, 0x08, LogFileSequenceNumber);
LittleEndianWriter.WriteUInt16(buffer, 0x10, m_sequenceNumber);
LittleEndianWriter.WriteUInt16(buffer, 0x12, ReferenceCount);
LittleEndianWriter.WriteUInt16(buffer, 0x14, firstAttributeOffset);
LittleEndianWriter.WriteUInt16(buffer, 0x16, (ushort)m_flags);
LittleEndianWriter.WriteInt32(buffer, 0x1C, bytesPerFileRecordSegment);
m_baseFileRecordSegment.WriteBytes(buffer, 0x20);
LittleEndianWriter.WriteUInt16(buffer, 0x28, NextAttributeInstance);
if (minorNTFSVersion == 1)
{
LittleEndianWriter.WriteUInt32(buffer, 0x2C, (uint)m_segmentNumber);
}
LittleEndianWriter.WriteUInt32(buffer, updateSequenceArrayOffset, UpdateSequenceNumber);
// write attributes
int position = firstAttributeOffset;
foreach (AttributeRecord attribute in m_immediateAttributes)
{
byte[] attributeBytes = attribute.GetBytes();
ByteWriter.WriteBytes(buffer, position, attributeBytes);
position += attributeBytes.Length;
}
LittleEndianWriter.WriteUInt32(buffer, position, AttributesEndMarker);
position += AttributesEndMarkerLength; // End marker + alignment to 8-byte boundary
uint segmentLength = (uint)position;
LittleEndianWriter.WriteUInt32(buffer, 0x18, segmentLength);
if (applyUsaProtection)
{
MultiSectorHelper.ApplyUsaProtection(buffer, 0);
}
return(buffer);
}
