📄 bench.cpp

📁 含有多种公开密钥算法、多种块加密、多种数据流加密、多种HASH函数、多种CheckSum校验、多种MAC校验等几十种加密算法的程序
💻 CPP
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/* This file is in the public domain */#include <iostream>#include <iomanip>#include <ctime>#include <cmath>#include <string>#include <exception>#include <botan/rng.h>#include <botan/filters.h>using namespace Botan_types;struct algorithm   {      algorithm(const std::string& t, const std::string& n,                u32bit k = 0, u32bit i = 0) :         type(t), name(n), filtername(n), keylen(k), ivlen(i) {}      algorithm(const std::string& t, const std::string& n,                const std::string& f, u32bit k = 0, u32bit i = 0) :         type(t), name(n), filtername(f), keylen(k), ivlen(i) {}      std::string type, name, filtername;      u32bit keylen, ivlen, weight;   };extern const std::string END;extern algorithm algorithms[];/* Discard output to reduce overhead */struct BitBucket : public Botan::Filter   {   void write(const byte[], u32bit) {}   };Botan::Filter* lookup(const std::string&, const std::string&,                       const std::string&);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 = Botan::DEFAULT_BUFFERSIZE;   byte buf[BUFFERSIZE];   Botan::Global_RNG::randomize(buf, BUFFERSIZE);   u32bit iterations = 0;   std::clock_t start = std::clock(), clocks_used = 0;   while(clocks_used < seconds * CLOCKS_PER_SEC)      {      iterations++;      pipe.write(buf, BUFFERSIZE);      clocks_used = std::clock() - start;      }   double bytes_per_sec = ((double)iterations * BUFFERSIZE) /                          ((double)clocks_used / CLOCKS_PER_SEC);   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 = name.replace(name.find("<"), 1, "&lt;");      if(name.find(">") != std::string::npos)         name = name.replace(name.find(">"), 1, "&gt;");      std::cout << "   <TR><TH>" << name                << std::string(25 - name.length(), ' ') << "   <TH>";      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)   {   Botan::Filter* filter = lookup(filtername, std::string(int(2*keylen), 'A'),                                               std::string(int(2*ivlen), 'A'));   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 << "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD "                   << "HTML 4.0 Transitional//EN\">\n"                   << "<HTML>\n\n"                   << "<TITLE>Botan Benchmarks</TITLE>\n\n"                   << "<BODY>\n\n"                   << "<P><TABLE BORDER CELLSPACING=1>\n"                   << "<THEAD>\n"                   << "<TR><TH>Algorithm                      "                   << "<TH>Mbytes / second\n"                   << "<TBODY>\n";         }      double sum = 0;      u32bit how_many = 0;      for(u32bit j = 0; algorithms[j].type != END; j++)         if(what == "All" || what == algorithms[j].type)            {            double speed = bench(algorithms[j].name, algorithms[j].filtername,                                 html, seconds, algorithms[j].keylen,                                 algorithms[j].ivlen);            if(speed > .00001) /* log(0) == -inf -> messed up average */               sum += std::log(speed);            how_many++;            }      if(html)         std::cout << "</TABLE>\n\n";      double average = std::exp(sum / (double)how_many);      if(what == "All" && html)         std::cout << "\n<P>Overall speed average: " << average                   << "\n\n";      else if(what == "All")          std::cout << "\nOverall speed average: " << average                    << std::endl;      if(html) std::cout << "</BODY></HTML>\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)   {   try {   for(u32bit j = 0; algorithms[j].type != END; j++)      {      if(algorithms[j].name == name)         {         bench(algorithms[j].name, algorithms[j].filtername, false, 3.0,               algorithms[j].keylen, algorithms[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;      }   }
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