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Reduce time for reporting wrong password by removing support for legacy hidden format because it was never functional and it was superseded by current hidden format.

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This commit is contained in:
Mounir IDRASSI 2014-12-20 15:04:07 +01:00
parent 02cbecff64
commit 4b9f8b232b
8 changed files with 5 additions and 103 deletions
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1
src/Common/Common.h
View File

@ -43,7 +43,6 @@ enum
{
TC_VOLUME_TYPE_NORMAL = 0,
TC_VOLUME_TYPE_HIDDEN,
TC_VOLUME_TYPE_HIDDEN_LEGACY,
TC_VOLUME_TYPE_COUNT
};

12
src/Common/Dlgcode.c
View File

@ -9024,18 +9024,6 @@ int OpenVolume (OpenVolumeContext *context, const char *volumePath, Password *pa
headerOffset.QuadPart = useBackupHeader ? context->HostSize - TC_VOLUME_HEADER_SIZE : TC_HIDDEN_VOLUME_HEADER_OFFSET;
break;
case TC_VOLUME_TYPE_HIDDEN_LEGACY:
if (useBackupHeader)
{
status = ERR_PASSWORD_WRONG;
goto error;
}
if (context->IsDevice && deviceGeometry.BytesPerSector != TC_SECTOR_SIZE_LEGACY)
continue;
headerOffset.QuadPart = context->HostSize - TC_HIDDEN_VOLUME_HEADER_OFFSET_LEGACY;
break;
}
if (!SetFilePointerEx ((HANDLE) context->HostFileHandle, headerOffset, NULL, FILE_BEGIN))

8
src/Common/Password.c
View File

@ -258,12 +258,6 @@ int ChangePwd (const char *lpszVolume, Password *oldPassword, int old_pkcs5, Pas
headerOffset.QuadPart = TC_HIDDEN_VOLUME_HEADER_OFFSET;
break;
case TC_VOLUME_TYPE_HIDDEN_LEGACY:
if (bDevice && driveInfo.BytesPerSector != TC_SECTOR_SIZE_LEGACY)
continue;
headerOffset.QuadPart = hostSize - TC_HIDDEN_VOLUME_HEADER_OFFSET_LEGACY;
break;
}
if (!SetFilePointerEx ((HANDLE) dev, headerOffset, NULL, FILE_BEGIN))
@ -356,7 +350,7 @@ int ChangePwd (const char *lpszVolume, Password *oldPassword, int old_pkcs5, Pas
cryptoInfo->master_keydata,
&ci,
cryptoInfo->VolumeSize.Value,
(volumeType == TC_VOLUME_TYPE_HIDDEN || volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY) ? cryptoInfo->hiddenVolumeSize : 0,
(volumeType == TC_VOLUME_TYPE_HIDDEN) ? cryptoInfo->hiddenVolumeSize : 0,
cryptoInfo->EncryptedAreaStart.Value,
cryptoInfo->EncryptedAreaLength.Value,
cryptoInfo->RequiredProgramVersion,

23
src/Driver/Ntvol.c
View File

@ -319,10 +319,6 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
{
Dump ("Trying to open volume type %d\n", volumeType);
if (mount->bPartitionInInactiveSysEncScope
&& volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY)
continue;
/* Read the volume header */
if (!mount->bPartitionInInactiveSysEncScope
@ -348,16 +344,6 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
headerOffset.QuadPart = mount->UseBackupHeader ? lDiskLength.QuadPart - TC_HIDDEN_VOLUME_HEADER_OFFSET : TC_HIDDEN_VOLUME_HEADER_OFFSET;
break;
case TC_VOLUME_TYPE_HIDDEN_LEGACY:
if (mount->UseBackupHeader)
continue;
if (bRawDevice && Extension->HostBytesPerSector != TC_SECTOR_SIZE_LEGACY)
continue;
headerOffset.QuadPart = lDiskLength.QuadPart - TC_HIDDEN_VOLUME_HEADER_OFFSET_LEGACY;
break;
}
Dump ("Reading volume header at %I64d\n", headerOffset.QuadPart);
@ -455,7 +441,7 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
ReadVolumeHeaderRecoveryMode = mount->RecoveryMode;
if ((volumeType == TC_VOLUME_TYPE_HIDDEN || volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY) && mount->bProtectHiddenVolume)
if ((volumeType == TC_VOLUME_TYPE_HIDDEN) && mount->bProtectHiddenVolume)
{
mount->nReturnCode = ReadVolumeHeaderWCache (
FALSE,
@ -577,13 +563,9 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
break;
case TC_VOLUME_TYPE_HIDDEN:
case TC_VOLUME_TYPE_HIDDEN_LEGACY:
cryptoInfoPtr = mount->bProtectHiddenVolume ? tmpCryptoInfo : Extension->cryptoInfo;
if (volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY)
Extension->cryptoInfo->hiddenVolumeOffset = lDiskLength.QuadPart - cryptoInfoPtr->hiddenVolumeSize - TC_HIDDEN_VOLUME_HEADER_OFFSET_LEGACY;
else
Extension->cryptoInfo->hiddenVolumeOffset = cryptoInfoPtr->EncryptedAreaStart.Value;
Dump ("Hidden volume offset = %I64d\n", Extension->cryptoInfo->hiddenVolumeOffset);
@ -613,9 +595,6 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
Extension->cryptoInfo->hiddenVolumeProtectedSize = tmpCryptoInfo->hiddenVolumeSize;
if (volumeType == TC_VOLUME_TYPE_HIDDEN_LEGACY)
Extension->cryptoInfo->hiddenVolumeProtectedSize += TC_VOLUME_HEADER_SIZE_LEGACY;
Dump ("Hidden volume protection active: %I64d-%I64d (%I64d)\n", Extension->cryptoInfo->hiddenVolumeOffset, Extension->cryptoInfo->hiddenVolumeProtectedSize + Extension->cryptoInfo->hiddenVolumeOffset - 1, Extension->cryptoInfo->hiddenVolumeProtectedSize);
}

4
src/Main/GraphicUserInterface.cpp
View File

@ -232,7 +232,7 @@ namespace VeraCrypt
if (hiddenVolume)
{
if (typeid (*normalVolume->GetLayout()) == typeid (VolumeLayoutV1Normal) && typeid (*hiddenVolume->GetLayout()) != typeid (VolumeLayoutV1Hidden))
if (typeid (*normalVolume->GetLayout()) == typeid (VolumeLayoutV1Normal))
throw ParameterIncorrect (SRC_POS);
if (typeid (*normalVolume->GetLayout()) == typeid (VolumeLayoutV2Normal) && typeid (*hiddenVolume->GetLayout()) != typeid (VolumeLayoutV2Hidden))
@ -1281,7 +1281,7 @@ namespace VeraCrypt
}
shared_ptr <VolumeLayout> layout = volume->GetLayout();
if (typeid (*layout) == typeid (VolumeLayoutV1Normal) || typeid (*layout) == typeid (VolumeLayoutV1Hidden))
if (typeid (*layout) == typeid (VolumeLayoutV1Normal))
{
ShowError ("VOLUME_HAS_NO_BACKUP_HEADER");
return;

10
src/Volume/Volume.cpp
View File

@ -129,13 +129,6 @@ namespace VeraCrypt
if (useBackupHeaders && !layout->HasBackupHeader())
continue;
if (typeid (*layout) == typeid (VolumeLayoutV1Hidden)
&& deviceHosted
&& hostDeviceSectorSize != TC_SECTOR_SIZE_LEGACY)
{
continue;
}
SecureBuffer headerBuffer (layout->GetHeaderSize());
if (layout->HasDriveHeader())
@ -249,9 +242,6 @@ namespace VeraCrypt
ProtectedRangeStart = protectedVolume.VolumeDataOffset;
ProtectedRangeEnd = protectedVolume.VolumeDataOffset + protectedVolume.VolumeDataSize;
if (typeid (*protectedVolume.Layout) == typeid (VolumeLayoutV1Hidden))
ProtectedRangeEnd += protectedVolume.Layout->GetHeaderSize();
}
catch (PasswordException&)
{

30
src/Volume/VolumeLayout.cpp
View File

@ -28,7 +28,6 @@ namespace VeraCrypt
layouts.push_back (shared_ptr <VolumeLayout> (new VolumeLayoutV2Normal ()));
layouts.push_back (shared_ptr <VolumeLayout> (new VolumeLayoutV1Normal ()));
layouts.push_back (shared_ptr <VolumeLayout> (new VolumeLayoutV2Hidden ()));
layouts.push_back (shared_ptr <VolumeLayout> (new VolumeLayoutV1Hidden ()));
layouts.push_back (shared_ptr <VolumeLayout> (new VolumeLayoutSystemEncryption ()));
if (type != VolumeType::Unknown)
@ -85,35 +84,6 @@ namespace VeraCrypt
}
VolumeLayoutV1Hidden::VolumeLayoutV1Hidden ()
{
Type = VolumeType::Hidden;
HeaderOffset = -TC_HIDDEN_VOLUME_HEADER_OFFSET_LEGACY;
HeaderSize = TC_VOLUME_HEADER_SIZE_LEGACY;
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new AES ()));
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new Serpent ()));
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new Twofish ()));
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new AESTwofish ()));
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new AESTwofishSerpent ()));
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new SerpentAES ()));
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new SerpentTwofishAES ()));
SupportedEncryptionAlgorithms.push_back (shared_ptr <EncryptionAlgorithm> (new TwofishSerpent ()));
SupportedEncryptionModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
}
uint64 VolumeLayoutV1Hidden::GetDataOffset (uint64 volumeHostSize) const
{
return volumeHostSize - GetDataSize (volumeHostSize) + HeaderOffset;
}
uint64 VolumeLayoutV1Hidden::GetDataSize (uint64 volumeHostSize) const
{
return Header->GetHiddenVolumeDataSize ();
}
VolumeLayoutV2Normal::VolumeLayoutV2Normal ()
{
Type = VolumeType::Normal;

18
src/Volume/VolumeLayout.h
View File

@ -78,24 +78,6 @@ namespace VeraCrypt
};
class VolumeLayoutV1Hidden : public VolumeLayout
{
public:
VolumeLayoutV1Hidden ();
virtual ~VolumeLayoutV1Hidden () { }
virtual int GetBackupHeaderOffset () const { throw NotApplicable (SRC_POS); }
virtual uint64 GetDataOffset (uint64 volumeHostSize) const;
virtual uint64 GetDataSize (uint64 volumeHostSize) const;
virtual uint64 GetMaxDataSize (uint64 volumeSize) const { throw NotApplicable (SRC_POS); }
virtual bool HasBackupHeader () const { return false; }
private:
VolumeLayoutV1Hidden (const VolumeLayoutV1Hidden &);
VolumeLayoutV1Hidden &operator= (const VolumeLayoutV1Hidden &);
};
class VolumeLayoutV2Normal : public VolumeLayout
{
public: