/usr/share/doc/libbotan1.10-dev/examples/ecdsa.cpp is in libbotan1.10-dev 1.10.5-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | /*
* (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 <memory>
#include <iostream>
using namespace Botan;
int main()
{
Botan::LibraryInitializer init;
try
{
AutoSeeded_RNG rng;
EC_Domain_Params params("secp160r1");
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);
*/
PK_Signer 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";
PK_Verifier 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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