mirror of
https://github.com/aaru-dps/Aaru.git
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276 lines
12 KiB
C#
276 lines
12 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Data.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2022 Natalia Portillo
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// Copyright © 2020-2022 Rebecca Wallander
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// ****************************************************************************/
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using DVDDecryption = Aaru.Decryption.DVD.Dump;
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// ReSharper disable JoinDeclarationAndInitializer
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// ReSharper disable InlineOutVariableDeclaration
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// ReSharper disable TooWideLocalVariableScope
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namespace Aaru.Core.Devices.Dumping;
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using System;
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using System.Linq;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Extents;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Core.Logging;
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using Aaru.Decoders.DVD;
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using Aaru.Decryption;
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using Aaru.Decryption.DVD;
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using Aaru.Settings;
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using Schemas;
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partial class Dump
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{
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/// <summary>Dumps data when dumping from a SCSI Block Commands compliant device</summary>
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/// <param name="blocks">Media blocks</param>
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/// <param name="maxBlocksToRead">Maximum number of blocks to read in a single command</param>
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/// <param name="blockSize">Block size in bytes</param>
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/// <param name="currentTry">Resume information</param>
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/// <param name="extents">Correctly dump extents</param>
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/// <param name="currentSpeed">Current speed</param>
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/// <param name="minSpeed">Minimum speed</param>
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/// <param name="maxSpeed">Maximum speed</param>
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/// <param name="totalDuration">Total time spent in commands</param>
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/// <param name="scsiReader">SCSI reader</param>
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/// <param name="mhddLog">MHDD log</param>
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/// <param name="ibgLog">ImgBurn log</param>
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/// <param name="imageWriteDuration">Total time spent writing to image</param>
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/// <param name="newTrim">Set if we need to start a trim</param>
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/// <param name="dvdDecrypt">DVD CSS decryption module</param>
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/// <param name="discKey">The DVD disc key</param>
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void ReadSbcData(in ulong blocks, in uint maxBlocksToRead, in uint blockSize, DumpHardwareType currentTry,
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ExtentsULong extents, ref double currentSpeed, ref double minSpeed, ref double maxSpeed,
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ref double totalDuration, Reader scsiReader, MhddLog mhddLog, IbgLog ibgLog,
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ref double imageWriteDuration, ref bool newTrim, ref DVDDecryption dvdDecrypt, byte[] discKey)
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{
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ulong sectorSpeedStart = 0;
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bool sense;
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DateTime timeSpeedStart = DateTime.UtcNow;
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byte[] buffer;
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uint blocksToRead = maxBlocksToRead;
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var outputFormat = _outputPlugin as IWritableImage;
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InitProgress?.Invoke();
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for(ulong i = _resume.NextBlock; i < blocks; i += blocksToRead)
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{
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if(_aborted)
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{
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currentTry.Extents = ExtentsConverter.ToMetadata(extents);
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UpdateStatus?.Invoke("Aborted!");
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_dumpLog.WriteLine("Aborted!");
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break;
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}
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if(blocks - i < blocksToRead)
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blocksToRead = (uint)(blocks - i);
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if(currentSpeed > maxSpeed &&
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currentSpeed > 0)
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maxSpeed = currentSpeed;
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if(currentSpeed < minSpeed &&
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currentSpeed > 0)
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minSpeed = currentSpeed;
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UpdateProgress?.Invoke($"Reading sector {i} of {blocks} ({currentSpeed:F3} MiB/sec.)", (long)i,
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(long)blocks);
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sense = scsiReader.ReadBlocks(out buffer, i, blocksToRead, out double cmdDuration, out _, out _);
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totalDuration += cmdDuration;
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if(!sense &&
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!_dev.Error)
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{
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if(Settings.Current.EnableDecryption &&
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discKey != null &&
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_titleKeys)
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{
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for(ulong j = 0; j < blocksToRead; j++)
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{
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if(_aborted)
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break;
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if(!_resume.MissingTitleKeys.Contains(i + j))
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// Key is already dumped.
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continue;
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byte[] tmpBuf;
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bool tmpSense = dvdDecrypt.ReadTitleKey(out tmpBuf, out _, DvdCssKeyClass.DvdCssCppmOrCprm,
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i + j, _dev.Timeout, out _);
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if(!tmpSense)
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{
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CSS_CPRM.TitleKey? titleKey = CSS.DecodeTitleKey(tmpBuf, dvdDecrypt.BusKey);
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if(titleKey.HasValue)
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outputFormat.WriteSectorTag(new[]
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{
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titleKey.Value.CMI
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}, i + j, SectorTagType.DvdCmi);
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else
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continue;
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// If the CMI bit is 1, the sector is using copy protection, else it is not
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if((titleKey.Value.CMI & 0x80) >> 7 == 0)
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{
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// The CMI indicates this sector is not encrypted.
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outputFormat.WriteSectorTag(new byte[]
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{
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0, 0, 0, 0, 0
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}, i + j, SectorTagType.DvdTitleKey);
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outputFormat.WriteSectorTag(new byte[]
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{
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0, 0, 0, 0, 0
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}, i + j, SectorTagType.DvdTitleKeyDecrypted);
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_resume.MissingTitleKeys.Remove(i + j);
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continue;
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}
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// According to libdvdcss, if the key is all zeroes, the sector is actually
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// not encrypted even if the CMI says it is.
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if(titleKey.Value.Key.All(k => k == 0))
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{
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outputFormat.WriteSectorTag(new byte[]
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{
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0, 0, 0, 0, 0
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}, i + j, SectorTagType.DvdTitleKey);
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outputFormat.WriteSectorTag(new byte[]
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{
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0, 0, 0, 0, 0
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}, i + j, SectorTagType.DvdTitleKeyDecrypted);
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_resume.MissingTitleKeys.Remove(i + j);
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continue;
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}
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outputFormat.WriteSectorTag(titleKey.Value.Key, i + j, SectorTagType.DvdTitleKey);
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_resume.MissingTitleKeys.Remove(i + j);
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CSS.DecryptTitleKey(0, discKey, titleKey.Value.Key, out tmpBuf);
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outputFormat.WriteSectorTag(tmpBuf, i + j, SectorTagType.DvdTitleKeyDecrypted);
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}
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}
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if(!_storeEncrypted)
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// Todo: Flag in the outputFormat that a sector has been decrypted
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{
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ErrorNumber errno =
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outputFormat.ReadSectorsTag(i, blocksToRead, SectorTagType.DvdCmi, out byte[] cmi);
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if(errno != ErrorNumber.NoError)
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ErrorMessage?.Invoke($"Error retrieving CMI for sector {i}");
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else
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{
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errno = outputFormat.ReadSectorsTag(i, blocksToRead, SectorTagType.DvdTitleKeyDecrypted,
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out byte[] titleKey);
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if(errno != ErrorNumber.NoError)
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ErrorMessage?.Invoke($"Error retrieving title key for sector {i}");
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else
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buffer = CSS.DecryptSector(buffer, cmi, titleKey, blocksToRead, blockSize);
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}
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}
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}
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mhddLog.Write(i, cmdDuration);
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ibgLog.Write(i, currentSpeed * 1024);
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DateTime writeStart = DateTime.Now;
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outputFormat.WriteSectors(buffer, i, blocksToRead);
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imageWriteDuration += (DateTime.Now - writeStart).TotalSeconds;
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extents.Add(i, blocksToRead, true);
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}
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else
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{
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if(_dev.Manufacturer.ToLowerInvariant() == "insite")
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{
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_resume.BadBlocks.Add(i);
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_resume.BadBlocks = _resume.BadBlocks.Distinct().ToList();
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_resume.NextBlock++;
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_aborted = true;
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_dumpLog?.
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WriteLine("INSITE floptical drives get crazy on the SCSI bus when an error is found, stopping so you can reboot the computer or reset the scsi bus appropriately.");
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UpdateStatus?.
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Invoke("INSITE floptical drives get crazy on the SCSI bus when an error is found, stopping so you can reboot the computer or reset the scsi bus appropriately");
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continue;
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}
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// TODO: Reset device after X errors
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if(_stopOnError)
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return; // TODO: Return more cleanly
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if(i + _skip > blocks)
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_skip = (uint)(blocks - i);
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// Write empty data
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DateTime writeStart = DateTime.Now;
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outputFormat.WriteSectors(new byte[blockSize * _skip], i, _skip);
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imageWriteDuration += (DateTime.Now - writeStart).TotalSeconds;
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for(ulong b = i; b < i + _skip; b++)
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_resume.BadBlocks.Add(b);
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mhddLog.Write(i, cmdDuration < 500 ? 65535 : cmdDuration);
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ibgLog.Write(i, 0);
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_dumpLog.WriteLine("Skipping {0} blocks from errored block {1}.", _skip, i);
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i += _skip - blocksToRead;
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newTrim = true;
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}
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sectorSpeedStart += blocksToRead;
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_resume.NextBlock = i + blocksToRead;
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double elapsed = (DateTime.UtcNow - timeSpeedStart).TotalSeconds;
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if(elapsed <= 0)
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continue;
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currentSpeed = sectorSpeedStart * blockSize / (1048576 * elapsed);
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sectorSpeedStart = 0;
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timeSpeedStart = DateTime.UtcNow;
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}
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_resume.BadBlocks = _resume.BadBlocks.Distinct().ToList();
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EndProgress?.Invoke();
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}
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} |