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/*
* Generate a root CA plus httpd, dovecot, and postfix certs/keys
*
*/
#include <botan/botan.h>
#include <botan/rsa.h>
#include <botan/x509self.h>
#include <botan/x509_ca.h>
#include <chrono>
using namespace Botan;
#include <iostream>
#include <fstream>
void fill_commoninfo(X509_Cert_Options& opts)
{
opts.country = "US";
opts.organization = "randombit.net";
opts.email = "admin@randombit.net";
opts.locality = "Vermont";
}
X509_Certificate make_ca_cert(RandomNumberGenerator& rng,
const Private_Key& priv_key,
const X509_Time& now,
const X509_Time& later)
{
X509_Cert_Options opts;
fill_commoninfo(opts);
opts.common_name = "randombit.net CA";
opts.start = now;
opts.end = later;
opts.CA_key();
return X509::create_self_signed_cert(opts, priv_key, "SHA-256", rng);
}
PKCS10_Request make_server_cert_req(const Private_Key& key,
const std::string& hostname,
RandomNumberGenerator& rng)
{
X509_Cert_Options opts;
opts.common_name = hostname;
fill_commoninfo(opts);
opts.add_ex_constraint("PKIX.ServerAuth");
return X509::create_cert_req(opts, key, "SHA-1", rng);
}
void save_pair(const std::string& name,
const std::string& password,
const X509_Certificate& cert,
const Private_Key& key,
RandomNumberGenerator& rng)
{
std::string cert_fsname = name + "_cert.pem";
std::string key_fsname = name + "_key.pem";
std::ofstream cert_out(cert_fsname.c_str());
cert_out << cert.PEM_encode() << "\n";
cert_out.close();
std::ofstream key_out(key_fsname.c_str());
if(password != "")
key_out << PKCS8::PEM_encode(key, rng, password);
else
key_out << PKCS8::PEM_encode(key);
key_out.close();
}
typedef std::chrono::duration<int, std::ratio<31556926>> years;
int main()
{
auto current_time = std::chrono::system_clock::now();
X509_Time now = X509_Time(current_time);
X509_Time later = X509_Time(current_time + years(4));
LibraryInitializer init;
AutoSeeded_RNG rng;
RSA_PrivateKey ca_key(rng, 2048);
X509_Certificate ca_cert = make_ca_cert(rng, ca_key, now, later);
const std::string ca_password = "sekrit";
save_pair("ca", ca_password, ca_cert, ca_key, rng);
X509_CA ca(ca_cert, ca_key, "SHA-256");
RSA_PrivateKey httpd_key(rng, 1536);
X509_Certificate httpd_cert = ca.sign_request(
make_server_cert_req(httpd_key, "www.randombit.net", rng),
rng, now, later);
save_pair("httpd", "", httpd_cert, httpd_key, rng);
RSA_PrivateKey bugzilla_key(rng, 1536);
X509_Certificate bugzilla_cert = ca.sign_request(
make_server_cert_req(bugzilla_key, "bugs.randombit.net", rng),
rng, now, later);
save_pair("bugzilla", "", bugzilla_cert, bugzilla_key, rng);
RSA_PrivateKey postfix_key(rng, 1536);
X509_Certificate postfix_cert = ca.sign_request(
make_server_cert_req(postfix_key, "mail.randombit.net", rng),
rng, now, later);
save_pair("postfix", "", postfix_cert, postfix_key, rng);
RSA_PrivateKey dovecot_key(rng, 1536);
X509_Certificate dovecot_cert = ca.sign_request(
make_server_cert_req(dovecot_key, "imap.randombit.net", rng),
rng, now, later);
save_pair("dovecot", "", dovecot_cert, dovecot_key, rng);
}
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