stack.cpp

来自「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Chec」· C++ 代码 · 共 64 行

/*
An Botan example application showing how to use the pop and prepend functions
of Pipe. Based on the md5 example. It's output should always be identical to
such.

Written by Jack Lloyd ([e-mail]), Feb 3, 2002

This file is in the public domain
*/

#include <iostream>
#include <fstream>
#include <botan/filters.h>

int main(int argc, char* argv[])
   {
   if(argc < 2)
      {
      std::cout << "Usage: stack <filenames>" << std::endl;
      return 1;
      }

   Botan::LibraryInitializer init;

   Botan::Pipe pipe;

   // this is a pretty vacuous example, but it's useful as a test
   pipe.prepend(new Botan::Hash_Filter("MD5"));
   pipe.prepend(new Botan::Hash_Filter("RIPEMD-160"));
   pipe.prepend(new Botan::Chain(
                   new Botan::Hash_Filter("RIPEMD-160"),
                   new Botan::Hash_Filter("RIPEMD-160")));
   pipe.pop(); // will pop everything inside the Chain as well as Chain itself
   pipe.pop(); // will get rid of the RIPEMD-160 Hash_Filter
   pipe.prepend(new Botan::Hash_Filter("SHA-1"));
   pipe.append(new Botan::Hex_Encoder);
   pipe.prepend(new Botan::Hash_Filter("SHA-1"));
   pipe.pop(); // Get rid of the Hash_Filter(SHA-1)
   pipe.pop(); // Get rid of the other Hash_Filter(SHA-1)
       // The Hex_Encoder is safe because it is at the end of the Pipe,
       // and pop() pulls off the Filter that is at the start.
   pipe.prepend(new Botan::Hash_Filter("RIPEMD-160"));
   pipe.pop(); // Get rid of that last prepended Hash_Filter(RIPEMD-160)

   int skipped = 0;
   for(int j = 1; argv[j] != 0; j++)
      {
      std::ifstream file(argv[j]);
      if(!file)
         {
         std::cout << "ERROR: could not open " << argv[j] << std::endl;
         skipped++;
         continue;
         }
      pipe.start_msg();
      file >> pipe;
      pipe.end_msg();
      file.close();
      pipe.set_default_msg(j-1-skipped);
      std::cout << pipe << "  " << argv[j] << std::endl;
      }
   return 0;
   }