Botan Benchmarks

#include #include #include #include #include #include using Botan::byte; using Botan::u64bit; #include "common.h" #include "bench.h" /* Discard output to reduce overhead */ struct BitBucket : public Botan::Filter { void write(const byte[], u32bit) {} }; Botan::Filter* lookup(const std::string&, const std::vector&, const std::string& = "All"); namespace { double bench_filter(std::string name, Botan::Filter* filter, bool html, double seconds) { Botan::Pipe pipe(filter, new BitBucket); pipe.start_msg(); static const u32bit BUFFERSIZE = 32*1024; byte buf[BUFFERSIZE]; global_rng().randomize(buf, BUFFERSIZE); u32bit iterations = 0; u64bit start = get_clock(), clocks_used = 0; u64bit go_up_to = static_cast(seconds * get_ticks()); while(clocks_used < go_up_to) { iterations++; pipe.write(buf, BUFFERSIZE); clocks_used = get_clock() - start; } double bytes_per_sec = (static_cast(iterations) * BUFFERSIZE) / (static_cast(clocks_used) / get_ticks()); double mbytes_per_sec = bytes_per_sec / (1024.0 * 1024.0); std::cout.setf(std::ios::fixed, std::ios::floatfield); std::cout.precision(2); if(html) { if(name.find("<") != std::string::npos) name.replace(name.find("<"), 1, "<"); if(name.find(">") != std::string::npos) name.replace(name.find(">"), 1, ">"); std::cout << " " << name << std::string(25 - name.length(), ' ') << " "; std::cout.width(6); std::cout << mbytes_per_sec << std::endl; } else { std::cout << name << ": " << std::string(25 - name.length(), ' '); std::cout.width(6); std::cout << mbytes_per_sec << " Mbytes/sec" << std::endl; } return (mbytes_per_sec); } double bench(const std::string& name, const std::string& filtername, bool html, double seconds, u32bit keylen, u32bit ivlen) { std::vector params; Botan::SecureVector key(keylen); global_rng().randomize(key, key.size()); params.push_back(hex_encode(key, key.size())); //params.push_back(std::string(int(2*keylen), 'A')); params.push_back(std::string(int(2* ivlen), 'A')); Botan::Filter* filter = lookup(filtername, params); if(filter) return bench_filter(name, filter, html, seconds); return 0; } } void benchmark(const std::string& what, bool html, double seconds) { try { if(html) { std::cout << "\n" << "\n\n" << "Botan Benchmarks\n\n" << "\n\n" << "

\n" << "\n" << "\n"; } double sum = 0; u32bit how_many = 0; std::vector algos = get_algos(); for(u32bit j = 0; j != algos.size(); j++) if(what == "All" || what == algos[j].type) { double speed = bench(algos[j].name, algos[j].filtername, html, seconds, algos[j].keylen, algos[j].ivlen); if(speed > .00001) /* log(0) == -inf -> messed up average */ sum += std::log(speed); how_many++; } if(html) std::cout << "
Algorithm " << " Mbytes / second\n" << "
\n\n"; double average = std::exp(sum / static_cast(how_many)); if(what == "All" && html) std::cout << "\n

Overall speed average: " << average << "\n\n"; else if(what == "All") std::cout << "\nOverall speed average: " << average << std::endl; if(html) std::cout << "\n"; } catch(Botan::Exception& e) { std::cout << "Botan exception caught: " << e.what() << std::endl; return; } catch(std::exception& e) { std::cout << "Standard library exception caught: " << e.what() << std::endl; return; } catch(...) { std::cout << "Unknown exception caught." << std::endl; return; } } u32bit bench_algo(const std::string& name, double seconds) { try { std::vector algos = get_algos(); for(u32bit j = 0; j != algos.size(); j++) { if(algos[j].name == name) { bench(algos[j].name, algos[j].filtername, false, seconds, algos[j].keylen, algos[j].ivlen); return 1; } } return 0; } catch(Botan::Exception& e) { std::cout << "Botan exception caught: " << e.what() << std::endl; return 0; } catch(std::exception& e) { std::cout << "Standard library exception caught: " << e.what() << std::endl; return 0; } catch(...) { std::cout << "Unknown exception caught." << std::endl; return 0; } }