Botan 加密算法库的简单示例

Botan 是一个 C++ 的加密算法库，支持 AES, DES, SHA-1, RSA, DSA, Diffie-Hellman 等多种算法，支持 X.509 认证以及CRLs 和 PKCS #10botan-demo.c#include <botan/botan.h>
#include <botan/x509_ca.h>
#include <botan/util.h>
using namespace Botan;#include <iostream>
#include <memory>int main（int argc, char* argv[]）
   {
   if（argc ！= 5）
      {
      std::cout << "Usage: " << argv[0] << " <passphrase> "
                << "<ca cert> <ca key> <pkcs10>" << std::endl;
      return 1;
      }   try
      {
      const std::string arg_passphrase = argv[1];
      const std::string arg_ca_cert = argv[2];
      const std::string arg_ca_key = argv[3];
      const std::string arg_req_file = argv[4];      AutoSeeded_RNG rng;      X509_Certificate ca_cert（arg_ca_cert）;      std::auto_ptr<PKCS8_PrivateKey> privkey（
         PKCS8::load_key（arg_ca_key, rng, arg_passphrase）
         ）;      X509_CA ca（ca_cert, *privkey）;      // got a request
      PKCS10_Request req（arg_req_file）;      // you would insert checks here, and perhaps modify the request
      // （this example should be extended to show how）      // now sign the request
      X509_Time start_time（system_time（））;
      X509_Time end_time（system_time（） + 365 * 60 * 60 * 24）;      X509_Certificate new_cert = ca.sign_request（req, rng,
                                                  start_time, end_time）;      // send the new cert back to the requestor
      std::cout << new_cert.PEM_encode（）;
   }
   catch（std::exception& e）
      {
      std::cout << e.what（） << std::endl;
      return 1;
      }
   return 0;
}