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); }