// length: number of bytes to encrypt; may be larger than one data unit and must be divisible by the cipher block size
// ks: the primary key schedule
// ks2: the secondary key schedule
// startDataUnitNo: The sequential number of the data unit with which the buffer starts.
// startCipherBlockNo: The sequential number of the first plaintext block to encrypt inside the data unit startDataUnitNo.
// When encrypting the data unit from its first block, startCipherBlockNo is 0.
// The startCipherBlockNo value applies only to the first data unit in the buffer; each successive
// data unit is encrypted from its first block. The start of the buffer does not have to be
// aligned with the start of a data unit. If it is aligned, startCipherBlockNo must be 0; if it
// is not aligned, startCipherBlockNo must reflect the misalignment accordingly.
void EncryptBufferXTS (unsigned __int8 *buffer,
TC_LARGEST_COMPILER_UINT length,
const UINT64_STRUCT *startDataUnitNo,
unsigned int startCipherBlockNo,
unsigned __int8 *ks,
unsigned __int8 *ks2,
int cipher)
{
if (CipherSupportsIntraDataUnitParallelization (cipher))
EncryptBufferXTSParallel (buffer, length, startDataUnitNo, startCipherBlockNo, ks, ks2, cipher);
else
EncryptBufferXTSNonParallel (buffer, length, startDataUnitNo, startCipherBlockNo, ks, ks2, cipher);
}
// For descriptions of the input parameters, see EncryptBufferXTS().
void DecryptBufferXTS (unsigned __int8 *buffer,
GST_LARGEST_COMPILER_UINT length,
const UINT64_STRUCT *startDataUnitNo,
unsigned int startCipherBlockNo,
unsigned __int8 *ks,
unsigned __int8 *ks2,
int cipher)
{
if (CipherGetBlockSize(cipher) == 8)
DecryptBufferXTS8Byte (buffer, length, startDataUnitNo, startCipherBlockNo, ks, ks2, cipher);
else if (CipherSupportsIntraDataUnitParallelization (cipher))
DecryptBufferXTSParallel (buffer, length, startDataUnitNo, startCipherBlockNo, ks, ks2, cipher);
else
DecryptBufferXTSNonParallel (buffer, length, startDataUnitNo, startCipherBlockNo, ks, ks2, cipher);
}
