internal static byte[] GetBytes(FileStream streamToRead, Superblock superblock, uint offset)
{
// Derive Length of Inode Table from superblock values
uint length = superblock.InodesPerGroup * Inode.EXT4_INODE_SIZE;
// Get Inode Table bytes
return(NativeMethods.readDrive(streamToRead, offset, length));
}
public byte[] GetBytes(string volume)
{
IntPtr hDevice = NativeMethods.getHandle(volume);
using (FileStream streamToRead = NativeMethods.getFileStream(hDevice))
{
Superblock sb = new Superblock(Superblock.GetBytes(streamToRead, 0));
return(Win32.NativeMethods.readDrive(streamToRead, (sb.BlockSize * this.StartBlock), (sb.BlockSize * this.BlockCount)));
}
}
public byte[] GetBytes(string volume)
{
IntPtr hDevice = NativeMethods.getHandle(volume);
using (FileStream streamToRead = NativeMethods.getFileStream(hDevice))
{
Superblock sb = new Superblock(Superblock.GetBytes(streamToRead, 0));
return Win32.NativeMethods.readDrive(streamToRead, (sb.BlockSize * this.StartBlock), (sb.BlockSize * this.BlockCount));
}
}
internal static byte[] GetBytes(FileStream streamToRead, uint superblockOffset, Superblock superBlock)
{
// Derive the location and length of the Block Group Descriptor Table
uint offset = (superblockOffset * NativeMethods.BYTES_PER_SECTOR) + ((superBlock.FirstDataBlock + 1) * superBlock.BlockSize);
uint bgdtEntries = (superBlock.TotalBlockCount / superBlock.BlocksPerGroup) + 1;
uint length = bgdtEntries * BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Ensure the bgdtLength value is a multiple of 512 (minimum value for reading bytes from disk)
if ((length % NativeMethods.BYTES_PER_SECTOR) != 0)
{
length += (NativeMethods.BYTES_PER_SECTOR - (length % NativeMethods.BYTES_PER_SECTOR));
}
// Get BlockGroupDescriptor bytes
return NativeMethods.readDrive(streamToRead, offset, length);
}
internal static byte[] GetBytes(FileStream streamToRead, uint superblockOffset, Superblock superBlock, uint group)
{
// Derive the location and length of the Block Group Descriptor Table
uint bgdtOffset = (superblockOffset * NativeMethods.BYTES_PER_SECTOR) + ((superBlock.FirstDataBlock + 1) * superBlock.BlockSize);
uint bgdtEntries = (superBlock.TotalBlockCount / superBlock.BlocksPerGroup) + 1;
uint bgdtLength = bgdtEntries * BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Determine the offset from the beginning of the BGDT to the desired group
uint groupOffset = group * BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Determine what Sector contains the raw bytes
uint groupSectorOffset = groupOffset / NativeMethods.BYTES_PER_SECTOR;
// Read the sector that the desired block resides within
byte[] SectorBytes = NativeMethods.readDrive(streamToRead, bgdtOffset + (groupSectorOffset * NativeMethods.BYTES_PER_SECTOR), NativeMethods.BYTES_PER_SECTOR);
// Get Block Group Descriptor offset into Sector
uint sectorOffset = (group % BLOCK_GROUPS_PER_SECTOR) * BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Create byte[] containing only bytes for the requested Block Group Descriptor
return NativeMethods.GetSubArray(SectorBytes, sectorOffset, BLOCK_GROUP_DESCRIPTOR_LENGTH);
}
internal static byte[] GetBytes(FileStream streamToRead, uint superblockOffset, Superblock superBlock)
{
// Derive the location and length of the Block Group Descriptor Table
uint offset = (superblockOffset * NativeMethods.BYTES_PER_SECTOR) + ((superBlock.FirstDataBlock + 1) * superBlock.BlockSize);
uint bgdtEntries = (superBlock.TotalBlockCount / superBlock.BlocksPerGroup) + 1;
uint length = bgdtEntries * BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Ensure the bgdtLength value is a multiple of 512 (minimum value for reading bytes from disk)
if ((length % NativeMethods.BYTES_PER_SECTOR) != 0)
{
length += (NativeMethods.BYTES_PER_SECTOR - (length % NativeMethods.BYTES_PER_SECTOR));
}
// Get BlockGroupDescriptor bytes
return(NativeMethods.readDrive(streamToRead, offset, length));
}
internal static byte[] GetBytes(FileStream streamToRead, uint superblockOffset, Superblock superBlock, uint group)
{
// Derive the location and length of the Block Group Descriptor Table
uint bgdtOffset = (superblockOffset * NativeMethods.BYTES_PER_SECTOR) + ((superBlock.FirstDataBlock + 1) * superBlock.BlockSize);
uint bgdtEntries = (superBlock.TotalBlockCount / superBlock.BlocksPerGroup) + 1;
uint bgdtLength = bgdtEntries * BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Determine the offset from the beginning of the BGDT to the desired group
uint groupOffset = group * BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Determine what Sector contains the raw bytes
uint groupSectorOffset = groupOffset / NativeMethods.BYTES_PER_SECTOR;
// Read the sector that the desired block resides within
byte[] SectorBytes = NativeMethods.readDrive(streamToRead, bgdtOffset + (groupSectorOffset * NativeMethods.BYTES_PER_SECTOR), NativeMethods.BYTES_PER_SECTOR);
// Get Block Group Descriptor offset into Sector
uint sectorOffset = (group % BLOCK_GROUPS_PER_SECTOR) * BLOCK_GROUP_DESCRIPTOR_LENGTH;
// Create byte[] containing only bytes for the requested Block Group Descriptor
return(NativeMethods.GetSubArray(SectorBytes, sectorOffset, BLOCK_GROUP_DESCRIPTOR_LENGTH));
}
protected override void ProcessRecord()
{
#region MBR
MasterBootRecord mbr = MasterBootRecord.Get(devicePath);
uint superblockOffset = 0;
foreach (PartitionEntry partition in mbr.PartitionTable)
{
if (partition.Bootable && partition.SystemID == "LINUX")
{
superblockOffset = partition.StartSector;
}
}
#endregion MBR
// Obtain a handle to the device named "devicePath"
IntPtr hDevice = NativeMethods.getHandle(devicePath);
using (FileStream streamToRead = NativeMethods.getFileStream(hDevice))
{
// Get Superblock to understand File System Layout
Superblock superBlock = new Superblock(Superblock.GetBytes(streamToRead, superblockOffset));
if (this.MyInvocation.BoundParameters.ContainsKey("Inode"))
{
if (inode == 0)
{
throw new Exception("0 is not a valid Inode value.");
}
else
{
uint block_group = (inode - 1) / superBlock.InodesPerGroup;
BlockGroupDescriptor bgd = new BlockGroupDescriptor(BlockGroupDescriptorTable.GetBytes(streamToRead, superblockOffset, superBlock));
uint inodeTableOffset = (superblockOffset * NativeMethods.BYTES_PER_SECTOR) + (bgd.InodeTableOffset * superBlock.BlockSize);
uint inodeSectorOffset = (inode - 1) / (NativeMethods.BYTES_PER_SECTOR / (uint)superBlock.InodeSize);
byte[] SectorBytes = NativeMethods.readDrive(streamToRead, inodeTableOffset + (inodeSectorOffset * NativeMethods.BYTES_PER_SECTOR), NativeMethods.BYTES_PER_SECTOR);
uint sectorOffset = ((inode - 1) % (NativeMethods.BYTES_PER_SECTOR / (uint)superBlock.InodeSize)) * (uint)superBlock.InodeSize;
byte[] inodeBytes = NativeMethods.GetSubArray(SectorBytes, sectorOffset, (uint)superBlock.InodeSize);
if (asbytes)
{
WriteObject(inodeBytes);
}
else
{
WriteObject(new Inode(inodeBytes, inode));
}
}
}
else
{
// Create a byte array representing the BGDT
byte[] bgdtBytes = BlockGroupDescriptorTable.GetBytes(streamToRead, superblockOffset, superBlock);
// Iterate through BGDTs and output associate Inodes
for (uint o = 0; o < bgdtBytes.Length; o += BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH)
{
BlockGroupDescriptor bgd = new BlockGroupDescriptor(NativeMethods.GetSubArray(bgdtBytes, o, BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH));
uint inodeTableOffset = (superblockOffset * NativeMethods.BYTES_PER_SECTOR) + (bgd.InodeTableOffset * superBlock.BlockSize);
byte[] inodeTableBytes = InodeTable.GetBytes(streamToRead, superBlock, inodeTableOffset);
for (uint i = 0; i < inodeTableBytes.Length; i += (uint)superBlock.InodeSize)
{
uint inode = ((o / BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH) + 1) * ((i / (uint)superBlock.InodeSize) + 1);
WriteObject(new Inode(NativeMethods.GetSubArray(inodeTableBytes, i, superBlock.InodeSize), inode));
}
}
}
}
}
protected override void ProcessRecord()
{
#region MBR
MasterBootRecord mbr = MasterBootRecord.Get(devicePath);
uint superblockOffset = 0;
foreach (PartitionEntry partition in mbr.PartitionTable)
{
if (partition.Bootable && partition.SystemID == "LINUX")
{
superblockOffset = partition.StartSector;
}
}
#endregion MBR
// Obtain a handle to the device named "devicePath"
IntPtr hDevice = NativeMethods.getHandle(devicePath);
using (FileStream streamToRead = NativeMethods.getFileStream(hDevice))
{
// Get Superblock to understand File System Layout
Superblock superBlock = new Superblock(Superblock.GetBytes(streamToRead, superblockOffset));
// Derive the location and length of the Block Group Descriptor Table
uint bgdtOffset = (superblockOffset * NativeMethods.BYTES_PER_SECTOR) + ((superBlock.FirstDataBlock + 1) * superBlock.BlockSize);
uint bgdtEntries = (superBlock.TotalBlockCount / superBlock.BlocksPerGroup) + 1;
uint bgdtLength = bgdtEntries * BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH;
}
}
protected override void ProcessRecord()
{
#region MBR
MasterBootRecord mbr = MasterBootRecord.Get(devicePath);
uint superblockOffset = 0;
foreach (PartitionEntry partition in mbr.PartitionTable)
{
if (partition.Bootable && partition.SystemID == "LINUX")
{
superblockOffset = partition.StartSector;
}
}
#endregion MBR
// Obtain a handle to the device named "devicePath"
IntPtr hDevice = NativeMethods.getHandle(devicePath);
using (FileStream streamToRead = NativeMethods.getFileStream(hDevice))
{
// Get Superblock to understand File System Layout
Superblock superBlock = new Superblock(Superblock.GetBytes(streamToRead, superblockOffset));
if(this.MyInvocation.BoundParameters.ContainsKey("GroupNumber"))
{
if (asbytes)
{
WriteObject(BlockGroupDescriptor.GetBytes(streamToRead, superblockOffset, superBlock, number));
}
else
{
WriteObject(new BlockGroupDescriptor(BlockGroupDescriptor.GetBytes(streamToRead, superblockOffset, superBlock, number)));
}
}
else
{
if (asbytes)
{
BlockGroupDescriptorTable.GetBytes(streamToRead, superblockOffset, superBlock);
}
else
{
byte[] bgdtBytes = BlockGroupDescriptorTable.GetBytes(streamToRead, superblockOffset, superBlock);
for (uint o = 0; o < bgdtBytes.Length; o += BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH)
{
WriteObject(new BlockGroupDescriptor(NativeMethods.GetSubArray(bgdtBytes, o, BlockGroupDescriptor.BLOCK_GROUP_DESCRIPTOR_LENGTH)));
}
}
}
}
}
