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/*
Generate an RSA key of a specified bitlength, and put it into a pair of key
files. One is the public key in X.509 format (PEM encoded), the private key is
in PKCS #8 format (also PEM encoded).
Written by Jack Lloyd (lloyd@randombit.net), June 2-3, 2002
Updated to use X.509 and PKCS #8 on October 21, 2002
This file is in the public domain
*/
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <memory>
#include <botan/botan.h>
#include <botan/rsa.h>
using namespace Botan;
int main(int argc, char* argv[])
{
if(argc != 2 && argc != 3)
{
std::cout << "Usage: " << argv[0] << " bitsize [passphrase]"
<< std::endl;
return 1;
}
u32bit bits = std::atoi(argv[1]);
if(bits < 1024 || bits > 4096)
{
std::cout << "Invalid argument for bitsize" << std::endl;
return 1;
}
Botan::LibraryInitializer init;
std::ofstream pub("rsapub.pem");
std::ofstream priv("rsapriv.pem");
if(!priv || !pub)
{
std::cout << "Couldn't write output files" << std::endl;
return 1;
}
try
{
AutoSeeded_RNG rng;
RSA_PrivateKey key(rng, bits);
pub << X509::PEM_encode(key);
if(argc == 2)
priv << PKCS8::PEM_encode(key);
else
priv << PKCS8::PEM_encode(key, rng, argv[2]);
}
catch(std::exception& e)
{
std::cout << "Exception caught: " << e.what() << std::endl;
}
return 0;
}
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