void BenchMark(const char *name, BlockTransformation &cipher, double timeTotal)
{
const int BUF_SIZE = cipher.BlockSize();
SecByteBlock buf(BUF_SIZE);
clock_t start = clock();
unsigned long i=0, length=BUF_SIZE;
double timeTaken;
do
{
length *= 2;
for (; i<length; i+=BUF_SIZE)
cipher.ProcessBlock(buf);
timeTaken = double(clock() - start) / CLOCK_TICKS_PER_SECOND;
}
while (timeTaken < 2.0/3*timeTotal);
OutputResultBytes(name, length, timeTaken);
}
void DES_Process(const char *keyString, byte *block, size_t length, CryptoPP::CipherDir direction){
using namespace CryptoPP;
byte key[DES_EDE2::KEYLENGTH];
memcpy(key, keyString, DES_EDE2::KEYLENGTH);
BlockTransformation *t = NULL;
if(direction == ENCRYPTION)
t = new DES_EDE2_Encryption(key, DES_EDE2::KEYLENGTH);
else
t = new DES_EDE2_Decryption(key, DES_EDE2::KEYLENGTH);
int steps = length / t->BlockSize();
for(int i=0; i<steps; i++){
int offset = i * t->BlockSize();
t->ProcessBlock(block + offset);
}
delete t;
}
void BenchMark(const char *name, BlockTransformation &cipher, double timeTotal)
{
const int BUF_SIZE = RoundDownToMultipleOf(1024U, cipher.OptimalNumberOfParallelBlocks() * cipher.BlockSize());
SecByteBlock buf(BUF_SIZE);
const int nBlocks = BUF_SIZE / cipher.BlockSize();
clock_t start = clock();
unsigned long i=0, blocks=1;
double timeTaken;
do
{
blocks *= 2;
for (; i<blocks; i++)
cipher.ProcessAndXorMultipleBlocks(buf, NULL, buf, nBlocks);
timeTaken = double(clock() - start) / CLOCK_TICKS_PER_SECOND;
}
while (timeTaken < 2.0/3*timeTotal);
OutputResultBytes(name, double(blocks) * BUF_SIZE, timeTaken);
}
FeedBackMode::FeedBackMode(const BlockTransformation &cipher, const byte *IV, int fbs)
: CipherMode(cipher, IV), FBS(fbs ? fbs : S)
{
cipher.ProcessBlock(reg, buffer);
counter = 0;
}