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#include "tests.h"
#include "test_pubkey.h"
#include <botan/auto_rng.h>
#include <botan/pubkey.h>
#include <botan/elgamal.h>
#include <botan/hex.h>
#include <iostream>
#include <fstream>
using namespace Botan;
namespace {
size_t elgamal_kat(const std::string& p,
const std::string& g,
const std::string& x,
const std::string& msg,
std::string padding,
const std::string& nonce,
const std::string& ciphertext)
{
AutoSeeded_RNG rng;
const BigInt p_bn = BigInt(p);
const BigInt g_bn = BigInt(g);
const BigInt x_bn = BigInt(x);
DL_Group group(p_bn, g_bn);
ElGamal_PrivateKey privkey(rng, group, x_bn);
ElGamal_PublicKey pubkey = privkey;
if(padding == "")
padding = "Raw";
PK_Encryptor_EME enc(pubkey, padding);
PK_Decryptor_EME dec(privkey, padding);
return validate_encryption(enc, dec, "ElGamal/" + padding, msg, nonce, ciphertext);
}
}
size_t test_elgamal()
{
std::ifstream elgamal_enc(TEST_DATA_DIR "/elgamal.vec");
size_t fails = 0;
fails += run_tests_bb(elgamal_enc, "ElGamal Encryption", "Ciphertext", true,
[](std::map<std::string, std::string> m) -> size_t
{
return elgamal_kat(m["P"], m["G"], m["X"], m["Msg"],
m["Padding"], m["Nonce"], m["Ciphertext"]);
});
return fails;
}
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