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Windows: Implement support for mounting partially encrypted system partitions

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For now, we force ReadOnly mounting for such partitions.
This commit is contained in:
Mounir IDRASSI
2023-08-13 22:50:37 +02:00
parent 8c7962bda7
commit f84d235cf1
7 changed files with 34 additions and 5 deletions
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15
src/Driver/Ntdriver.c
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@@ -3156,6 +3156,21 @@ VOID VolumeThreadProc (PVOID Context)
Extension->Queue.HostFileHandle = Extension->hDeviceFile;
Extension->Queue.VirtualDeviceLength = Extension->DiskLength;
Extension->Queue.MaxReadAheadOffset.QuadPart = Extension->HostLength;
if (bDevice && pThreadBlock->mount->bPartitionInInactiveSysEncScope
&& (!Extension->cryptoInfo->hiddenVolume)
&& (Extension->cryptoInfo->EncryptedAreaLength.Value != Extension->cryptoInfo->VolumeSize.Value)
)
{
// Support partial encryption only in the case of system encryption
Extension->Queue.EncryptedAreaStart = 0;
Extension->Queue.EncryptedAreaEnd = Extension->cryptoInfo->EncryptedAreaLength.Value - 1;
if (Extension->Queue.CryptoInfo->EncryptedAreaLength.Value == 0)
{
Extension->Queue.EncryptedAreaStart = -1;
Extension->Queue.EncryptedAreaEnd = -1;
}
Extension->Queue.bSupportPartialEncryption = TRUE;
}
if (Extension->SecurityClientContextValid)
Extension->Queue.SecurityClientContext = &Extension->SecurityClientContext;