1 files changed, 57 insertions, 0 deletions
diff --git a/doc/examples/dsa_kgen.cpp b/doc/examples/dsa_kgen.cpp
new file mode 100644
index 000000000..eb3a00393
--- /dev/null
+++ b/doc/examples/dsa_kgen.cpp
@@ -0,0 +1,57 @@
+/*
+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.
+
+The domain parameters are the ones specified as the Java default DSA
+parameters. There is nothing special about these, it's just the only 1024-bit
+DSA parameter set that's included in Botan at the time of this writing. The
+application always reads/writes all of the domain parameters to/from the file,
+so a new set could be used without any problems. We could generate a new set
+for each key, or read a set of DSA params from a file and use those, but they
+mostly seem like needless complications.
+
+Written by Jack Lloyd ([email protected]), August 5, 2002
+   Updated to use X.509 and PKCS #8 formats, October 21, 2002
+
+This file is in the public domain
+*/
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <botan/botan.h>
+#include <botan/dsa.h>
+using namespace Botan;
+
+int main(int argc, char* argv[])
+   {
+   if(argc != 2)
+      {
+      std::cout << "Usage: " << argv[0] << " passphrase" << std::endl;
+      return 1;
+      }
+
+   std::string passphrase(argv[1]);
+
+   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 {
+      LibraryInitializer init;
+
+      DSA_PrivateKey key(DL_Group("dsa/jce/1024"));
+
+      pub << X509::PEM_encode(key);
+      priv << PKCS8::PEM_encode(key, passphrase);
+   }
+   catch(std::exception& e)
+      {
+      std::cout << "Exception caught: " << e.what() << std::endl;
+      }
+   return 0;
+   }