Add a couple of new examples

1 files changed, 124 insertions, 0 deletions

diff --git a/doc/examples/gen_certs.cpp b/doc/examples/gen_certs.cpp
new file mode 100644
index 000000000..f635e1ccf
--- /dev/null
+++ b/doc/examples/gen_certs.cpp
@@ -0,0 +1,124 @@
+/*
+* Generate a root CA plus httpd, dovecot, and postfix certs/keys
+*
+*/
+
+#include <botan/botan.h>
+#include <botan/rsa.h>
+#include <botan/util.h>
+#include <botan/x509self.h>
+#include <botan/x509_ca.h>
+
+using namespace Botan;
+
+#include <iostream>
+#include <fstream>
+
+void fill_commoninfo(X509_Cert_Options& opts)
+   {
+   opts.country = "US";
+   opts.organization = "randombit.net";
+   opts.email = "[email protected]";
+   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, 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, 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();
+   }
+
+int main()
+   {
+   const u32bit seconds_in_a_year = 31556926;
+
+   const u32bit current_time = system_time();
+
+   X509_Time now = X509_Time(current_time);
+   X509_Time later = X509_Time(current_time + 4*seconds_in_a_year);
+
+   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);
+
+   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);
+   }