public bool Open(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
if (stream.Length < 512)
{
return(false);
}
byte[] qHdrB = new byte[Marshal.SizeOf <QCow2Header>()];
stream.Read(qHdrB, 0, Marshal.SizeOf <QCow2Header>());
qHdr = Marshal.SpanToStructureBigEndian <QCow2Header>(qHdrB);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.magic = 0x{0:X8}", qHdr.magic);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.version = {0}", qHdr.version);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_offset = {0}", qHdr.backing_file_offset);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_size = {0}", qHdr.backing_file_size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.cluster_bits = {0}", qHdr.cluster_bits);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.size = {0}", qHdr.size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.crypt_method = {0}", qHdr.crypt_method);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1_size = {0}", qHdr.l1_size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1_table_offset = {0}", qHdr.l1_table_offset);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.refcount_table_offset = {0}", qHdr.refcount_table_offset);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.refcount_table_clusters = {0}",
qHdr.refcount_table_clusters);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.nb_snapshots = {0}", qHdr.nb_snapshots);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.snapshots_offset = {0}", qHdr.snapshots_offset);
if (qHdr.version >= QCOW_VERSION3)
{
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.features = {0:X}", qHdr.features);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.compat_features = {0:X}", qHdr.compat_features);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.autoclear_features = {0:X}", qHdr.autoclear_features);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.refcount_order = {0}", qHdr.refcount_order);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.header_length = {0}", qHdr.header_length);
if ((qHdr.features & QCOW_FEATURE_MASK) != 0)
{
throw new
ImageNotSupportedException($"Unknown incompatible features {qHdr.features & QCOW_FEATURE_MASK:X} enabled, not proceeding.");
}
}
if (qHdr.size <= 1)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.size), "Image size is too small");
}
if (qHdr.cluster_bits < 9 ||
qHdr.cluster_bits > 16)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.cluster_bits),
"Cluster size must be between 512 bytes and 64 Kbytes");
}
if (qHdr.crypt_method > QCOW_ENCRYPTION_AES)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.crypt_method), "Invalid encryption method");
}
if (qHdr.crypt_method > QCOW_ENCRYPTION_NONE)
{
throw new NotImplementedException("AES encrypted images not yet supported");
}
if (qHdr.backing_file_offset != 0)
{
throw new NotImplementedException("Differencing images not yet supported");
}
clusterSize = 1 << (int)qHdr.cluster_bits;
clusterSectors = 1 << ((int)qHdr.cluster_bits - 9);
l2Bits = (int)(qHdr.cluster_bits - 3);
l2Size = 1 << l2Bits;
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.clusterSize = {0}", clusterSize);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.clusterSectors = {0}", clusterSectors);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.qHdr.l1_size = {0}", qHdr.l1_size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Size = {0}", l2Size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.sectors = {0}", imageInfo.Sectors);
byte[] l1TableB = new byte[qHdr.l1_size * 8];
stream.Seek((long)qHdr.l1_table_offset, SeekOrigin.Begin);
stream.Read(l1TableB, 0, (int)qHdr.l1_size * 8);
l1Table = MemoryMarshal.Cast <byte, ulong>(l1TableB).ToArray();
AaruConsole.DebugWriteLine("QCOW plugin", "Reading L1 table");
for (long i = 0; i < l1Table.LongLength; i++)
{
l1Table[i] = Swapping.Swap(l1Table[i]);
}
l1Mask = 0;
int c = 0;
l1Shift = (int)(l2Bits + qHdr.cluster_bits);
for (int i = 0; i < 64; i++)
{
l1Mask <<= 1;
if (c >= 64 - l1Shift)
{
continue;
}
l1Mask += 1;
c++;
}
l2Mask = 0;
for (int i = 0; i < l2Bits; i++)
{
l2Mask = (l2Mask << 1) + 1;
}
l2Mask <<= (int)qHdr.cluster_bits;
sectorMask = 0;
for (int i = 0; i < qHdr.cluster_bits; i++)
{
sectorMask = (sectorMask << 1) + 1;
}
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Mask = {0:X}", l1Mask);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Shift = {0}", l1Shift);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Mask = {0:X}", l2Mask);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.sectorMask = {0:X}", sectorMask);
maxL2TableCache = MAX_CACHE_SIZE / (l2Size * 8);
maxClusterCache = MAX_CACHE_SIZE / clusterSize;
imageStream = stream;
sectorCache = new Dictionary <ulong, byte[]>();
l2TableCache = new Dictionary <ulong, ulong[]>();
clusterCache = new Dictionary <ulong, byte[]>();
imageInfo.CreationTime = imageFilter.GetCreationTime();
imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
imageInfo.Sectors = qHdr.size / 512;
imageInfo.SectorSize = 512;
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
imageInfo.MediaType = MediaType.GENERIC_HDD;
imageInfo.ImageSize = qHdr.size;
imageInfo.Version = $"{qHdr.version}";
imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63);
imageInfo.Heads = 16;
imageInfo.SectorsPerTrack = 63;
return(true);
}
public bool Open(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
if (stream.Length < 512)
{
return(false);
}
byte[] qHdrB = new byte[48];
stream.Read(qHdrB, 0, 48);
qHdr = Marshal.SpanToStructureBigEndian <QCowHeader>(qHdrB);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.magic = 0x{0:X8}", qHdr.magic);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.version = {0}", qHdr.version);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_offset = {0}", qHdr.backing_file_offset);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_size = {0}", qHdr.backing_file_size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.mtime = {0}", qHdr.mtime);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.size = {0}", qHdr.size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.cluster_bits = {0}", qHdr.cluster_bits);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l2_bits = {0}", qHdr.l2_bits);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.padding = {0}", qHdr.padding);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.crypt_method = {0}", qHdr.crypt_method);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1_table_offset = {0}", qHdr.l1_table_offset);
if (qHdr.size <= 1)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.size), "Image size is too small");
}
if (qHdr.cluster_bits < 9 ||
qHdr.cluster_bits > 16)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.cluster_bits),
"Cluster size must be between 512 bytes and 64 Kbytes");
}
if (qHdr.l2_bits < 9 - 3 ||
qHdr.l2_bits > 16 - 3)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.l2_bits),
"L2 size must be between 512 bytes and 64 Kbytes");
}
if (qHdr.crypt_method > QCOW_ENCRYPTION_AES)
{
throw new ArgumentOutOfRangeException(nameof(qHdr.crypt_method), "Invalid encryption method");
}
if (qHdr.crypt_method > QCOW_ENCRYPTION_NONE)
{
throw new NotImplementedException("AES encrypted images not yet supported");
}
if (qHdr.backing_file_offset != 0)
{
throw new NotImplementedException("Differencing images not yet supported");
}
int shift = qHdr.cluster_bits + qHdr.l2_bits;
if (qHdr.size > ulong.MaxValue - (ulong)(1 << shift))
{
throw new ArgumentOutOfRangeException(nameof(qHdr.size), "Image is too large");
}
clusterSize = 1 << qHdr.cluster_bits;
clusterSectors = 1 << (qHdr.cluster_bits - 9);
l1Size = (uint)(((qHdr.size + (ulong)(1 << shift)) - 1) >> shift);
l2Size = 1 << qHdr.l2_bits;
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.clusterSize = {0}", clusterSize);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.clusterSectors = {0}", clusterSectors);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Size = {0}", l1Size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Size = {0}", l2Size);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.sectors = {0}", imageInfo.Sectors);
byte[] l1TableB = new byte[l1Size * 8];
stream.Seek((long)qHdr.l1_table_offset, SeekOrigin.Begin);
stream.Read(l1TableB, 0, (int)l1Size * 8);
l1Table = MemoryMarshal.Cast <byte, ulong>(l1TableB).ToArray();
AaruConsole.DebugWriteLine("QCOW plugin", "Reading L1 table");
for (long i = 0; i < l1Table.LongLength; i++)
{
l1Table[i] = Swapping.Swap(l1Table[i]);
}
l1Mask = 0;
int c = 0;
l1Shift = qHdr.l2_bits + qHdr.cluster_bits;
for (int i = 0; i < 64; i++)
{
l1Mask <<= 1;
if (c >= 64 - l1Shift)
{
continue;
}
l1Mask += 1;
c++;
}
l2Mask = 0;
for (int i = 0; i < qHdr.l2_bits; i++)
{
l2Mask = (l2Mask << 1) + 1;
}
l2Mask <<= qHdr.cluster_bits;
sectorMask = 0;
for (int i = 0; i < qHdr.cluster_bits; i++)
{
sectorMask = (sectorMask << 1) + 1;
}
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Mask = {0:X}", l1Mask);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Shift = {0}", l1Shift);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Mask = {0:X}", l2Mask);
AaruConsole.DebugWriteLine("QCOW plugin", "qHdr.sectorMask = {0:X}", sectorMask);
maxL2TableCache = MAX_CACHE_SIZE / (l2Size * 8);
maxClusterCache = MAX_CACHE_SIZE / clusterSize;
imageStream = stream;
sectorCache = new Dictionary <ulong, byte[]>();
l2TableCache = new Dictionary <ulong, ulong[]>();
clusterCache = new Dictionary <ulong, byte[]>();
imageInfo.CreationTime = imageFilter.GetCreationTime();
imageInfo.LastModificationTime = qHdr.mtime > 0 ? DateHandlers.UnixUnsignedToDateTime(qHdr.mtime)
: imageFilter.GetLastWriteTime();
imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
imageInfo.Sectors = qHdr.size / 512;
imageInfo.SectorSize = 512;
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
imageInfo.MediaType = MediaType.GENERIC_HDD;
imageInfo.ImageSize = qHdr.size;
imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63);
imageInfo.Heads = 16;
imageInfo.SectorsPerTrack = 63;
return(true);
}