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/**
* Runtime benchmarking
* (C) 2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/benchmark.h>
#include <botan/buf_comp.h>
#include <botan/block_cipher.h>
#include <botan/stream_cipher.h>
#include <botan/hash.h>
#include <botan/mac.h>
#include <botan/util.h>
#include <memory>
namespace Botan {
namespace {
/**
* Benchmark BufferedComputation (hash or MAC)
*/
std::pair<u64bit, u64bit> bench_buf_comp(BufferedComputation* buf_comp,
Timer& timer,
u64bit nanoseconds_max,
const byte buf[], u32bit buf_len)
{
const u64bit start = timer.clock();
u64bit nanoseconds_used = 0;
u64bit reps = 0;
while(nanoseconds_used < nanoseconds_max)
{
buf_comp->update(buf, buf_len);
++reps;
nanoseconds_used = timer.clock() - start;
}
return std::make_pair(reps * buf_len, nanoseconds_used);
}
/**
* Benchmark block cipher
*/
std::pair<u64bit, u64bit>
bench_block_cipher(BlockCipher* block_cipher,
Timer& timer,
u64bit nanoseconds_max,
byte buf[], u32bit buf_len)
{
const u64bit start = timer.clock();
u64bit nanoseconds_used = 0;
u64bit reps = 0;
const u32bit in_blocks = buf_len / block_cipher->BLOCK_SIZE;
while(nanoseconds_used < nanoseconds_max)
{
block_cipher->encrypt_n(buf, buf, in_blocks);
++reps;
nanoseconds_used = timer.clock() - start;
}
return std::make_pair(reps * in_blocks * block_cipher->BLOCK_SIZE,
nanoseconds_used);
}
/**
* Benchmark stream
*/
std::pair<u64bit, u64bit>
bench_stream_cipher(StreamCipher* stream_cipher,
Timer& timer,
u64bit nanoseconds_max,
byte buf[], u32bit buf_len)
{
const u64bit start = timer.clock();
u64bit nanoseconds_used = 0;
u64bit reps = 0;
while(nanoseconds_used < nanoseconds_max)
{
stream_cipher->encrypt(buf, buf_len);
++reps;
nanoseconds_used = timer.clock() - start;
}
return std::make_pair(reps * buf_len, nanoseconds_used);
}
/**
* Benchmark hash
*/
std::pair<u64bit, u64bit>
bench_hash(HashFunction* hash, Timer& timer,
u64bit nanoseconds_max,
const byte buf[], u32bit buf_len)
{
return bench_buf_comp(hash, timer, nanoseconds_max, buf, buf_len);
}
/**
* Benchmark MAC
*/
std::pair<u64bit, u64bit>
bench_mac(MessageAuthenticationCode* mac,
Timer& timer,
u64bit nanoseconds_max,
const byte buf[], u32bit buf_len)
{
mac->set_key(buf, mac->MAXIMUM_KEYLENGTH);
return bench_buf_comp(mac, timer, nanoseconds_max, buf, buf_len);
}
}
std::map<std::string, double>
algorithm_benchmark(const std::string& name,
u32bit milliseconds,
Timer& timer,
RandomNumberGenerator& rng,
Algorithm_Factory& af)
{
std::vector<std::string> providers = af.providers_of(name);
std::map<std::string, double> all_results;
if(providers.empty()) // no providers, nothing to do
return all_results;
const u64bit ns_per_provider =
((u64bit)milliseconds * 1000 * 1000) / providers.size();
std::vector<byte> buf(16 * 1024);
rng.randomize(&buf[0], buf.size());
for(u32bit i = 0; i != providers.size(); ++i)
{
const std::string provider = providers[i];
std::pair<u64bit, u64bit> results(0, 0);
if(const BlockCipher* proto =
af.prototype_block_cipher(name, provider))
{
std::auto_ptr<BlockCipher> block_cipher(proto->clone());
results = bench_block_cipher(block_cipher.get(), timer,
ns_per_provider,
&buf[0], buf.size());
}
else if(const StreamCipher* proto =
af.prototype_stream_cipher(name, provider))
{
std::auto_ptr<StreamCipher> stream_cipher(proto->clone());
results = bench_stream_cipher(stream_cipher.get(), timer,
ns_per_provider,
&buf[0], buf.size());
}
else if(const HashFunction* proto =
af.prototype_hash_function(name, provider))
{
std::auto_ptr<HashFunction> hash(proto->clone());
results = bench_hash(hash.get(), timer, ns_per_provider,
&buf[0], buf.size());
}
else if(const MessageAuthenticationCode* proto =
af.prototype_mac(name, provider))
{
std::auto_ptr<MessageAuthenticationCode> mac(proto->clone());
results = bench_mac(mac.get(), timer, ns_per_provider,
&buf[0], buf.size());
}
if(results.first && results.second)
{
/* 953.67 == 1000 * 1000 * 1000 / 1024 / 1024 - the conversion
factor from bytes per nanosecond to mebibytes per second.
*/
double speed = (953.67 * results.first) / results.second;
all_results[provider] = speed;
}
}
return all_results;
}
}
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