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/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "tests.h"
#include "test_rng.h"
#if defined(BOTAN_HAS_HMAC_DRBG)
#include <botan/hmac_drbg.h>
#endif
#if defined(BOTAN_HAS_X931_RNG)
#include <botan/x931_rng.h>
#endif
namespace Botan_Tests {
namespace {
Botan::RandomNumberGenerator* get_rng(const std::string& algo_str, const std::vector<byte>& ikm)
{
class AllOnce_RNG : public Fixed_Output_RNG
{
public:
explicit AllOnce_RNG(const std::vector<byte>& in) : Fixed_Output_RNG(in) {}
Botan::secure_vector<byte> random_vec(size_t) override
{
Botan::secure_vector<byte> vec(this->remaining());
this->randomize(vec.data(), vec.size());
return vec;
}
};
const std::vector<std::string> algo_name = Botan::parse_algorithm_name(algo_str);
const std::string rng_name = algo_name[0];
#if defined(BOTAN_HAS_HMAC_DRBG)
if(rng_name == "HMAC_DRBG")
{
auto mac = Botan::MessageAuthenticationCode::create("HMAC(" + algo_name[1] + ")");
if(!mac)
{
return nullptr;
}
return new Botan::HMAC_DRBG(mac.release(), new AllOnce_RNG(ikm));
}
#endif
#if defined(BOTAN_HAS_X931_RNG)
if(rng_name == "X9.31-RNG")
{
auto bc = Botan::BlockCipher::create(algo_name[1]);
if(!bc)
{
return nullptr;
}
return new Botan::ANSI_X931_RNG(bc.release(), new Fixed_Output_RNG(ikm));
}
#endif
return nullptr;
}
#if defined(BOTAN_HAS_X931_RNG)
class X931_RNG_Tests : public Text_Based_Test
{
public:
X931_RNG_Tests() : Text_Based_Test("x931.vec", {"IKM", "L", "Out"}) {}
Test::Result run_one_test(const std::string& algo, const VarMap& vars) override
{
const std::vector<uint8_t> ikm = get_req_bin(vars, "IKM");
const std::vector<uint8_t> expected = get_req_bin(vars, "Out");
const size_t L = get_req_sz(vars, "L");
Test::Result result(algo);
result.test_eq("length", L, expected.size());
std::unique_ptr<Botan::RandomNumberGenerator> rng(get_rng(algo, ikm));
if(!rng)
{
result.note_missing("RNG " + algo);
return result;
}
result.test_eq("rng", rng->random_vec(L), expected);
return result;
}
};
BOTAN_REGISTER_TEST("x931_rng", X931_RNG_Tests);
#endif
#if defined(BOTAN_HAS_HMAC_DRBG)
class HMAC_DRBG_Tests : public Text_Based_Test
{
public:
HMAC_DRBG_Tests() : Text_Based_Test("hmac_drbg.vec",
{"EntropyInput", "EntropyInputReseed", "Out"}) {}
Test::Result run_one_test(const std::string& algo, const VarMap& vars) override
{
const std::vector<byte> seed_input = get_req_bin(vars, "EntropyInput");
const std::vector<byte> reseed_input = get_req_bin(vars, "EntropyInputReseed");
const std::vector<byte> expected = get_req_bin(vars, "Out");
Test::Result result(algo);
std::unique_ptr<Botan::RandomNumberGenerator> rng(get_rng(algo, seed_input));
if(!rng)
{
result.note_missing("RNG " + algo);
return result;
}
rng->reseed(0); // force initialization
// now reseed
rng->add_entropy(reseed_input.data(), reseed_input.size());
rng->random_vec(expected.size()); // discard 1st block
result.test_eq("rng", rng->random_vec(expected.size()), expected);
return result;
}
};
BOTAN_REGISTER_TEST("hmac_drbg", HMAC_DRBG_Tests);
#endif
}
}
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