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Identify CSS, read and get disc key

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This commit is contained in:
Rebecca Wallander
2021-01-13 23:37:05 +01:00
parent 5a44acfce2
commit 19ab8ce3b3
5 changed files with 131 additions and 1 deletions
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106
Aaru.Core/Devices/Dumping/MMC.cs
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@@ -39,12 +39,15 @@ using Aaru.Decoders.Bluray;
using Aaru.Decoders.DVD;
using Aaru.Decoders.SCSI;
using Aaru.Decoders.SCSI.MMC;
using Aaru.Decryption;
using Aaru.Decryption.DVD;
using Aaru.Devices;
using Schemas;
using DDS = Aaru.Decoders.DVD.DDS;
using DMI = Aaru.Decoders.Xbox.DMI;
using Inquiry = Aaru.CommonTypes.Structs.Devices.SCSI.Inquiry;
using Spare = Aaru.Decoders.DVD.Spare;
using DVDDecryption = Aaru.Decryption.DVD.Dump;
// ReSharper disable JoinDeclarationAndInitializer
@@ -505,6 +508,109 @@ namespace Aaru.Core.Devices.Dumping
tmpBuf = new byte[cmdBuf.Length - 4];
Array.Copy(cmdBuf, 4, tmpBuf, 0, cmdBuf.Length - 4);
mediaTags.Add(MediaTagType.DVD_CMI, tmpBuf);
CSS_CPRM.LeadInCopyright? cmi = CSS_CPRM.DecodeLeadInCopyright(cmdBuf);
if(cmi!.Value.CopyrightType == CopyrightType.NoProtection)
{
UpdateStatus?.Invoke("Drive reports no copy protection on disc.");
}
else
{
if(!_decryption)
{
UpdateStatus?.Invoke("Drive reports the disc uses copy protection. " +
"The dump might be incorrect unless decryption is enabled.");
}
else
{
if(cmi!.Value.CopyrightType == CopyrightType.CSS)
{
UpdateStatus?.Invoke("Drive reports disc uses CSS copy protection.");
var dvdDecrypt = new DVDDecryption(_dev);
sense = dvdDecrypt.ReadBusKey(out cmdBuf, out _,
CSS_CPRM.DecodeLeadInCopyright(cmdBuf)!.Value.
CopyrightType, _dev.Timeout, out _);
if(!sense)
{
byte[] busKey = cmdBuf;
UpdateStatus?.Invoke("Reading disc key.");
sense = dvdDecrypt.ReadDiscKey(out cmdBuf, out _, _dev.Timeout, out _);
if(!sense)
{
CSS_CPRM.DiscKey? decodedDiscKey = CSS.DecodeDiscKey(cmdBuf, busKey);
sense = dvdDecrypt.ReadAsf(out cmdBuf, out _,
DvdCssKeyClass.DvdCssCppmOrCprm, _dev.Timeout,
out _);
if(!sense)
{
if(cmdBuf[7] == 1)
{
UpdateStatus?.Invoke("Disc and drive authentication succeeded.");
sense = dvdDecrypt.ReadRpc(out cmdBuf, out _,
DvdCssKeyClass.DvdCssCppmOrCprm,
_dev.Timeout, out _);
if(!sense)
{
CSS_CPRM.RegionalPlaybackControlState? rpc =
CSS_CPRM.DecodeRegionalPlaybackControlState(cmdBuf);
if(rpc.HasValue)
{
if(CSS.CheckRegion(rpc.Value, cmi.Value))
{
UpdateStatus?.Invoke("Disc and drive regions match.");
}
else
{
UpdateStatus?.
Invoke("Disc and drive regions do not match. The dump might be incorrect");
}
}
}
if(decodedDiscKey.HasValue)
{
mediaTags.Add(MediaTagType.DVD_DiscKey,
decodedDiscKey.Value.Key);
UpdateStatus?.Invoke("Decrypting disc key.");
CSS.DecryptDiscKey(decodedDiscKey.Value.Key,
out byte[] discKey);
if(discKey != null)
{
UpdateStatus?.Invoke("Decryption of disc key succeeded.");
mediaTags.Add(MediaTagType.DVD_DiscKey_Decrypted, discKey);
}
else
{
UpdateStatus?.Invoke("Decryption of disc key failed.");
}
}
}
}
}
}
}
else
{
UpdateStatus?.
Invoke($"Drive reports disc uses {CSS_CPRM.DecodeLeadInCopyright(cmdBuf)!.Value.CopyrightType.ToString()} copy protection. " +
"This is not yet supported and the dump might be incorrect.");
}
}
}
}
}
#endregion DVD-ROM