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Diffstat (limited to 'botan/doc/examples/dsa_kgen.cpp')
-rw-r--r-- | botan/doc/examples/dsa_kgen.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/botan/doc/examples/dsa_kgen.cpp b/botan/doc/examples/dsa_kgen.cpp new file mode 100644 index 0000000..4669cf7 --- /dev/null +++ b/botan/doc/examples/dsa_kgen.cpp @@ -0,0 +1,66 @@ +/* +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 (lloyd@randombit.net), 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> +#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; + } |