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/*
* (C) 2023 Jack Lloyd
* 2023 Fabian Albert, Philippe Lieser - Rohde & Schwarz Cybersecurity
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "tests.h"
#if defined(BOTAN_HAS_HSS_LMS)
#include <botan/internal/lm_ots.h>
#include <botan/internal/stl_util.h>
namespace Botan_Tests {
namespace {
/**
* @brief Test the LMOTS logic of HSS-LMS
*/
class LMOTS_Test final : public Text_Based_Test {
public:
LMOTS_Test() : Text_Based_Test("pubkey/lmots.vec", "TypeId,Seed,I,q,Msg,PublicKey,HashSig") {}
bool skip_this_test(const std::string&, const VarMap& vars) override {
BOTAN_UNUSED(vars);
return false;
}
Test::Result run_one_test(const std::string&, const VarMap& vars) final {
Test::Result result("LMOTS");
const auto lmots_type_id = vars.get_req_u32("TypeId");
const auto seed = Botan::LMS_Seed(vars.get_req_bin("Seed"));
const auto identifier = Botan::LMS_Identifier(vars.get_req_bin("I"));
const auto q = Botan::LMS_Tree_Node_Idx(vars.get_req_u32("q"));
const auto msg = Botan::LMS_Message(vars.get_req_bin("Msg"));
const auto pk_ref = Botan::LMOTS_K(vars.get_req_bin("PublicKey"));
// To safe file space the signature is only stored in hashed form
const auto sig_ref = vars.get_req_bin("HashSig");
auto hash = Botan::HashFunction::create("SHA-256");
auto type = static_cast<Botan::LMOTS_Algorithm_Type>(lmots_type_id);
auto params = Botan::LMOTS_Params::create_or_throw(type);
// Test private/public OTS key creation
auto sk = Botan::LMOTS_Private_Key(params, identifier, q, seed);
const auto pk = Botan::LMOTS_Public_Key(sk);
result.test_is_eq("Public key generation", pk.K(), pk_ref);
// Test signature creation
Botan::LMOTS_Signature_Bytes sig(Botan::LMOTS_Signature::size(params));
sk.sign(sig, msg);
result.test_is_eq("Signature generation", hash->process<std::vector<uint8_t>>(sig), sig_ref);
// Test create pubkey from signature
auto sig_slicer = Botan::BufferSlicer(sig);
auto sig_obj = Botan::LMOTS_Signature::from_bytes_or_throw(sig_slicer);
Botan::LMOTS_K pk_from_sig = Botan::lmots_compute_pubkey_from_sig(sig_obj, msg, identifier, q);
result.test_is_eq("Public key from signature", pk_from_sig, pk_ref);
return result;
}
};
BOTAN_REGISTER_TEST("pubkey", "lmots", LMOTS_Test);
} // namespace
} // namespace Botan_Tests
#endif // BOTAN_HAS_HSS_LMS