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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/lms.h>
#include <botan/internal/stl_util.h>
namespace Botan_Tests {
namespace {
/**
* @brief Test the LMS logic of HSS-LMS
*/
class LMS_Test final : public Text_Based_Test {
public:
LMS_Test() : Text_Based_Test("pubkey/lms.vec", "Seed,Msg,q,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("LMS");
const auto seed = Botan::LMS_Seed(vars.get_req_bin("Seed"));
const auto msg = Botan::LMS_Message(vars.get_req_bin("Msg"));
const auto q = Botan::LMS_Tree_Node_Idx(vars.get_req_u32("q"));
const auto pk_ref = vars.get_req_bin("PublicKey");
// To safe file space the signature is only stored in hashed form
const auto hashed_sig_ref = vars.get_req_bin("HashSig");
auto hash = Botan::HashFunction::create("SHA-256");
auto lms_pk_ref_slicer = Botan::BufferSlicer(pk_ref);
Botan::LMS_PublicKey lms_pk_ref = Botan::LMS_PublicKey::from_bytes_or_throw(lms_pk_ref_slicer);
// Test public key creation
auto lms_sk =
Botan::LMS_PrivateKey(lms_pk_ref.lms_params(), lms_pk_ref.lmots_params(), lms_pk_ref.identifier(), seed);
auto pub_key = Botan::LMS_PublicKey(lms_sk);
result.test_is_eq("Public key generation", pub_key.to_bytes(), pk_ref);
// Test signature creation and verification
auto sk =
Botan::LMS_PrivateKey(lms_pk_ref.lms_params(), lms_pk_ref.lmots_params(), lms_pk_ref.identifier(), seed);
Botan::LMS_Signature_Bytes sig(Botan::LMS_Signature::size(lms_pk_ref.lms_params(), lms_pk_ref.lmots_params()));
auto pk_from_sig = sk.sign_and_get_pk(sig, q, msg);
result.test_is_eq("Signature creation", hash->process<std::vector<uint8_t>>(sig), hashed_sig_ref);
auto sig_slicer = Botan::BufferSlicer(sig);
auto sig_obj = Botan::LMS_Signature::from_bytes_or_throw(sig_slicer);
result.confirm("Signature verification", pub_key.verify_signature(msg, sig_obj));
return result;
}
};
BOTAN_REGISTER_TEST("pubkey", "lms", LMS_Test);
} // namespace
} // namespace Botan_Tests
#endif // BOTAN_HAS_HSS_LMS