More pubkey doc updates

1 files changed, 58 insertions, 0 deletions

diff --git a/doc/examples/dsa_kgen.cpp b/doc/examples/dsa_kgen.cpp
new file mode 100644
index 000000000..fe3157370
--- /dev/null
+++ b/doc/examples/dsa_kgen.cpp
@@ -0,0 +1,58 @@
+/*
+* (C) 2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*
+* Generate a 1024 bit DSA key and put it into a file. The public key
+* format is that specified by X.509, while the private key format is
+* PKCS #8.
+*/
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <botan/botan.h>
+#include <botan/dsa.h>
+#include <botan/rng.h>
+using namespace Botan;
+
+#include <memory>
+
+int main(int argc, char* argv[])
+   {
+   if(argc != 1 && argc != 2)
+      {
+      std::cout << "Usage: " << argv[0] << " [passphrase]" << std::endl;
+      return 1;
+      }
+
+   Botan::LibraryInitializer init;
+
+   std::ofstream priv("dsapriv.pem");
+   std::ofstream pub("dsapub.pem");
+   if(!priv || !pub)
+      {
+      std::cout << "Couldn't write output files" << std::endl;
+      return 1;
+      }
+
+   try
+      {
+      AutoSeeded_RNG rng;
+
+      DL_Group group(rng, DL_Group::DSA_Kosherizer, 2048, 256);
+
+      DSA_PrivateKey key(rng, group);
+
+      pub << X509::PEM_encode(key);
+      if(argc == 1)
+         priv << PKCS8::PEM_encode(key);
+      else
+         priv << PKCS8::PEM_encode(key, rng, argv[1]);
+   }
+   catch(std::exception& e)
+      {
+      std::cout << "Exception caught: " << e.what() << std::endl;
+      }
+   return 0;
+   }