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/*
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/botan.h>
#include <botan/ecdsa.h>
#include <botan/pubkey.h>
#include <botan/look_pk.h>
#include <memory>
#include <iostream>
using namespace Botan;
int main()
{
Botan::LibraryInitializer init;
try
{
AutoSeeded_RNG rng;
EC_Domain_Params params = get_EC_Dom_Pars_by_oid("1.3.132.0.8");
ECDSA_PrivateKey ecdsa(rng, params);
ECDSA_PublicKey ecdsa_pub = ecdsa;
/*
std::cout << params.get_curve().get_p() << "\n";
std::cout << params.get_order() << "\n";
std::cout << X509::PEM_encode(ecdsa);
std::cout << PKCS8::PEM_encode(ecdsa);
*/
std::auto_ptr<PK_Signer> signer(get_pk_signer(ecdsa, "EMSA1(SHA-256)"));
const char* message = "Hello World";
signer->update((const byte*)message, strlen(message));
SecureVector<byte> sig = signer->signature(rng);
std::cout << sig.size() << "\n";
std::auto_ptr<PK_Verifier> verifier(
get_pk_verifier(ecdsa_pub, "EMSA1(SHA-256)"));
verifier->update((const byte*)message, strlen(message));
bool ok = verifier->check_signature(sig);
if(ok)
std::cout << "Signature valid\n";
else
std::cout << "Bad signature\n";
}
catch(std::exception& e)
{
std::cout << e.what() << "\n";
}
}
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