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/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "tests.h"
#if defined(BOTAN_HAS_AEAD_MODES)
#include <botan/hex.h>
#include <botan/aead.h>
#include <iostream>
#include <fstream>
#include <memory>
using namespace Botan;
namespace {
size_t aead_test(const std::string& algo,
const std::string& input,
const std::string& expected,
const std::string& nonce_hex,
const std::string& ad_hex,
const std::string& key_hex)
{
const auto nonce = hex_decode_locked(nonce_hex);
const auto ad = hex_decode_locked(ad_hex);
const auto key = hex_decode_locked(key_hex);
std::unique_ptr<Cipher_Mode> enc(get_aead(algo, ENCRYPTION));
std::unique_ptr<Cipher_Mode> dec(get_aead(algo, DECRYPTION));
if(!enc || !dec)
throw std::runtime_error("Unknown AEAD '" + algo + "'");
enc->set_key(key);
dec->set_key(key);
if(auto aead_enc = dynamic_cast<AEAD_Mode*>(enc.get()))
aead_enc->set_associated_data_vec(ad);
if(auto aead_dec = dynamic_cast<AEAD_Mode*>(dec.get()))
aead_dec->set_associated_data_vec(ad);
size_t fail = 0;
const auto pt = hex_decode_locked(input);
const auto expected_ct = hex_decode_locked(expected);
auto vec = pt;
enc->start(nonce);
// should first update if possible
enc->finish(vec);
if(vec != expected_ct)
{
std::cout << algo << " got ct " << hex_encode(vec) << " expected " << expected << std::endl;
++fail;
}
vec = expected_ct;
dec->start(nonce);
dec->finish(vec);
if(vec != pt)
{
std::cout << algo << " got pt " << hex_encode(vec) << " expected " << input << std::endl;
++fail;
}
if(enc->authenticated())
{
vec = expected_ct;
vec[0] ^= 1;
dec->start(nonce);
try
{
dec->finish(vec);
std::cout << algo << " accepted message with modified message" << std::endl;
++fail;
}
catch(...) {}
if(nonce.size())
{
auto bad_nonce = nonce;
bad_nonce[0] ^= 1;
vec = expected_ct;
dec->start(bad_nonce);
try
{
dec->finish(vec);
std::cout << algo << " accepted message with modified nonce" << std::endl;
++fail;
}
catch(...) {}
}
if(auto aead_dec = dynamic_cast<AEAD_Mode*>(dec.get()))
{
auto bad_ad = ad;
if(ad.size())
bad_ad[0] ^= 1;
else
bad_ad.push_back(0);
aead_dec->set_associated_data_vec(bad_ad);
vec = expected_ct;
dec->start(nonce);
try
{
dec->finish(vec);
std::cout << algo << " accepted message with modified AD" << std::endl;
++fail;
}
catch(...) {}
}
}
return fail;
}
}
size_t test_aead()
{
auto test = [](const std::string& input)
{
std::ifstream vec(input);
return run_tests_bb(vec, "AEAD", "Out", true,
[](std::map<std::string, std::string> m)
{
return aead_test(m["AEAD"], m["In"], m["Out"],
m["Nonce"], m["AD"], m["Key"]);
});
};
return run_tests_in_dir(TEST_DATA_DIR "aead", test);
}
#else
SKIP_TEST(aead);
#endif // BOTAN_HAS_AEAD_MODES
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