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/*
* (C) 2009 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "speed.h"
#include <iostream>
#include <iomanip>
#include <botan/cipher_mode.h>
#include <botan/transform.h>
using namespace Botan;
namespace {
void benchmark_transform(std::unique_ptr<Transform> tf,
RandomNumberGenerator& rng,
const std::chrono::milliseconds runtime)
{
for(size_t buf_size : { 16, 64, 256, 1024, 8192 })
{
secure_vector<byte> buffer(buf_size);
std::chrono::nanoseconds time_used(0);
tf->start(rng.random_vec(tf->default_nonce_length()));
auto start = std::chrono::high_resolution_clock::now();
secure_vector<byte> buf(buf_size);
size_t reps = 0;
while(time_used < runtime)
{
tf->update(buf);
buf.resize(buf_size);
++reps;
time_used = std::chrono::high_resolution_clock::now() - start;
}
const u64bit nsec_used = std::chrono::duration_cast<std::chrono::nanoseconds>(time_used).count();
const double seconds_used = static_cast<double>(nsec_used) / 1000000000;
const double Mbps = ((reps / seconds_used) * buf_size) / 1024 / 1024;
std::cout << tf->name() << " " << std::setprecision(4) << Mbps
<< " MiB / sec with " << buf_size << " byte blocks" << std::endl;
}
}
}
bool benchmark_transform(RandomNumberGenerator& rng, const std::string& algo_name,
const std::chrono::milliseconds runtime)
{
std::unique_ptr<Transform> tf;
tf.reset(get_cipher_mode(algo_name, ENCRYPTION));
if(!tf)
return false;
if(Keyed_Transform* keyed = dynamic_cast<Keyed_Transform*>(tf.get()))
keyed->set_key(rng.random_vec(keyed->key_spec().maximum_keylength()));
benchmark_transform(std::move(tf), rng, runtime);
return true;
}
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