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#include "Crypto/cpu.h"
#include "Crypto/misc.h"
#include "EncryptionModeWolfCryptXTS.h"
#include "Common/Crypto.h"
namespace VeraCrypt
{
void EncryptionModeWolfCryptXTS::Encrypt (byte *data, uint64 length) const
{
EncryptBuffer (data, length, 0);
}
void EncryptionModeWolfCryptXTS::EncryptBuffer (byte *data, uint64 length, uint64 startDataUnitNo) const
{
if_debug (ValidateState());
CipherList::const_iterator iSecondaryCipher = SecondaryCiphers.begin();
for (CipherList::const_iterator iCipher = Ciphers.begin(); iCipher != Ciphers.end(); ++iCipher)
{
EncryptBufferXTS (**iCipher, **iSecondaryCipher, data, length, startDataUnitNo, 0);
++iSecondaryCipher;
}
assert (iSecondaryCipher == SecondaryCiphers.end());
}
void EncryptionModeWolfCryptXTS::EncryptBufferXTS (Cipher &cipher, const Cipher &secondaryCipher, byte *buffer, uint64 length, uint64 startDataUnitNo, unsigned int startCipherBlockNo) const
{
cipher.EncryptBlockXTS(buffer, length, startDataUnitNo);
}
void EncryptionModeWolfCryptXTS::EncryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
{
EncryptBuffer (data, sectorCount * sectorSize, sectorIndex * sectorSize / ENCRYPTION_DATA_UNIT_SIZE);
}
size_t EncryptionModeWolfCryptXTS::GetKeySize () const
{
if (Ciphers.empty())
throw NotInitialized (SRC_POS);
size_t keySize = 0;
foreach_ref (const Cipher &cipher, SecondaryCiphers)
{
keySize += cipher.GetKeySize();
}
return keySize;
}
void EncryptionModeWolfCryptXTS::Decrypt (byte *data, uint64 length) const
{
DecryptBuffer (data, length, 0);
}
void EncryptionModeWolfCryptXTS::DecryptBuffer (byte *data, uint64 length, uint64 startDataUnitNo) const
{
if_debug (ValidateState());
CipherList::const_iterator iSecondaryCipher = SecondaryCiphers.end();
for (CipherList::const_reverse_iterator iCipher = Ciphers.rbegin(); iCipher != Ciphers.rend(); ++iCipher)
{
--iSecondaryCipher;
DecryptBufferXTS (**iCipher, **iSecondaryCipher, data, length, startDataUnitNo, 0);
}
assert (iSecondaryCipher == SecondaryCiphers.begin());
}
void EncryptionModeWolfCryptXTS::DecryptBufferXTS (Cipher &cipher, const Cipher &secondaryCipher, byte *buffer, uint64 length, uint64 startDataUnitNo, unsigned int startCipherBlockNo) const
{
cipher.DecryptBlockXTS(buffer, length, startDataUnitNo);
}
void EncryptionModeWolfCryptXTS::DecryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
{
DecryptBuffer (data, sectorCount * sectorSize, sectorIndex * sectorSize / ENCRYPTION_DATA_UNIT_SIZE);
}
void EncryptionModeWolfCryptXTS::SetCiphers (const CipherList &ciphers)
{
EncryptionMode::SetCiphers (ciphers);
SecondaryCiphers.clear();
foreach_ref (const Cipher &cipher, ciphers)
{
SecondaryCiphers.push_back (cipher.GetNew());
}
if (SecondaryKey.Size() > 0)
SetSecondaryCipherKeys();
}
void EncryptionModeWolfCryptXTS::SetKey (const ConstBufferPtr &key)
{
SecondaryKey.Allocate (key.Size());
SecondaryKey.CopyFrom (key);
if (!SecondaryCiphers.empty())
SetSecondaryCipherKeys();
}
void EncryptionModeWolfCryptXTS::SetSecondaryCipherKeys ()
{
size_t keyOffset = 0;
foreach_ref (Cipher &cipher, SecondaryCiphers)
{
cipher.SetKeyXTS (SecondaryKey.GetRange (keyOffset, cipher.GetKeySize()));
keyOffset += cipher.GetKeySize();
}
KeySet = true;
}
}
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