/********************************************************************** * Copyright (c) 2018 Andrew Poelstra * * Distributed under the MIT software license, see the accompanying * * file COPYING or http://www.opensource.org/licenses/mit-license.php.* **********************************************************************/ #ifndef _SECP256K1_MODULE_MUSIG_TESTS_ #define _SECP256K1_MODULE_MUSIG_TESTS_ #include "secp256k1_musig.h" void musig_api_tests(secp256k1_scratch_space *scratch) { secp256k1_scratch_space *scratch_small; secp256k1_musig_session session[2]; secp256k1_musig_session verifier_session; secp256k1_musig_session_signer_data signer0[2]; secp256k1_musig_session_signer_data signer1[2]; secp256k1_musig_session_signer_data verifier_signer_data[2]; secp256k1_musig_partial_signature partial_sig[2]; secp256k1_musig_partial_signature partial_sig_adapted[2]; secp256k1_musig_partial_signature partial_sig_overflow; secp256k1_schnorrsig final_sig; secp256k1_schnorrsig final_sig_cmp; unsigned char buf[32]; unsigned char sk[2][32]; unsigned char ones[32]; unsigned char session_id[2][32]; unsigned char nonce_commitment[2][32]; int nonce_is_negated; const unsigned char *ncs[2]; unsigned char msg[32]; unsigned char msghash[32]; secp256k1_pubkey combined_pk; unsigned char pk_hash[32]; secp256k1_pubkey pk[2]; unsigned char sec_adaptor[32]; unsigned char sec_adaptor1[32]; secp256k1_pubkey adaptor; /** setup **/ secp256k1_context *none = secp256k1_context_create(SECP256K1_CONTEXT_NONE); secp256k1_context *sign = secp256k1_context_create(SECP256K1_CONTEXT_SIGN); secp256k1_context *vrfy = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY); int ecount; secp256k1_context_set_error_callback(none, counting_illegal_callback_fn, &ecount); secp256k1_context_set_error_callback(sign, counting_illegal_callback_fn, &ecount); secp256k1_context_set_error_callback(vrfy, counting_illegal_callback_fn, &ecount); secp256k1_context_set_illegal_callback(none, counting_illegal_callback_fn, &ecount); secp256k1_context_set_illegal_callback(sign, counting_illegal_callback_fn, &ecount); secp256k1_context_set_illegal_callback(vrfy, counting_illegal_callback_fn, &ecount); memset(ones, 0xff, 32); secp256k1_rand256(session_id[0]); secp256k1_rand256(session_id[1]); secp256k1_rand256(sk[0]); secp256k1_rand256(sk[1]); secp256k1_rand256(msg); secp256k1_rand256(sec_adaptor); CHECK(secp256k1_ec_pubkey_create(ctx, &pk[0], sk[0]) == 1); CHECK(secp256k1_ec_pubkey_create(ctx, &pk[1], sk[1]) == 1); CHECK(secp256k1_ec_pubkey_create(ctx, &adaptor, sec_adaptor) == 1); /** main test body **/ /* Key combination */ ecount = 0; CHECK(secp256k1_musig_pubkey_combine(none, scratch, &combined_pk, pk_hash, pk, 2) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_pubkey_combine(sign, scratch, &combined_pk, pk_hash, pk, 2) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, pk_hash, pk, 2) == 1); CHECK(ecount == 2); /* pubkey_combine does not require a scratch space */ CHECK(secp256k1_musig_pubkey_combine(vrfy, NULL, &combined_pk, pk_hash, pk, 2) == 1); CHECK(ecount == 2); /* A small scratch space works too, but will result in using an ineffecient algorithm */ scratch_small = secp256k1_scratch_space_create(ctx, 1); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch_small, &combined_pk, pk_hash, pk, 2) == 1); secp256k1_scratch_space_destroy(ctx, scratch_small); CHECK(ecount == 2); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, NULL, pk_hash, pk, 2) == 0); CHECK(ecount == 3); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, NULL, pk, 2) == 1); CHECK(ecount == 3); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, pk_hash, NULL, 2) == 0); CHECK(ecount == 4); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, pk_hash, pk, 0) == 0); CHECK(ecount == 5); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, pk_hash, NULL, 0) == 0); CHECK(ecount == 6); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, pk_hash, pk, 2) == 1); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, pk_hash, pk, 2) == 1); CHECK(secp256k1_musig_pubkey_combine(vrfy, scratch, &combined_pk, pk_hash, pk, 2) == 1); /** Session creation **/ ecount = 0; CHECK(secp256k1_musig_session_initialize(none, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_session_initialize(vrfy, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 1); CHECK(ecount == 2); CHECK(secp256k1_musig_session_initialize(sign, NULL, signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 0); CHECK(ecount == 3); CHECK(secp256k1_musig_session_initialize(sign, &session[0], NULL, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 0); CHECK(ecount == 4); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, NULL, session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 0); CHECK(ecount == 5); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], NULL, msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 0); CHECK(ecount == 6); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], NULL, &combined_pk, pk_hash, 2, 0, sk[0]) == 1); CHECK(ecount == 6); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, NULL, pk_hash, 2, 0, sk[0]) == 0); CHECK(ecount == 7); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, NULL, 2, 0, sk[0]) == 0); CHECK(ecount == 8); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 0, 0, sk[0]) == 0); CHECK(ecount == 8); /* If more than UINT32_MAX fits in a size_t, test that session_initialize * rejects n_signers that high. */ if (SIZE_MAX > UINT32_MAX) { CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, ((size_t) UINT32_MAX) + 2, 0, sk[0]) == 0); } CHECK(ecount == 8); CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, NULL) == 0); CHECK(ecount == 9); /* secret key overflows */ CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, ones) == 0); CHECK(ecount == 9); { secp256k1_musig_session session_without_msg; CHECK(secp256k1_musig_session_initialize(sign, &session_without_msg, signer0, nonce_commitment[0], session_id[0], NULL, &combined_pk, pk_hash, 2, 0, sk[0]) == 1); CHECK(secp256k1_musig_session_set_msg(none, &session_without_msg, msg) == 1); CHECK(secp256k1_musig_session_set_msg(none, &session_without_msg, msg) == 0); } CHECK(secp256k1_musig_session_initialize(sign, &session[0], signer0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 1); CHECK(secp256k1_musig_session_initialize(sign, &session[1], signer1, nonce_commitment[1], session_id[1], msg, &combined_pk, pk_hash, 2, 1, sk[1]) == 1); ncs[0] = nonce_commitment[0]; ncs[1] = nonce_commitment[1]; ecount = 0; CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, msg, &combined_pk, pk_hash, ncs, 2) == 1); CHECK(ecount == 0); CHECK(secp256k1_musig_session_initialize_verifier(none, NULL, verifier_signer_data, msg, &combined_pk, pk_hash, ncs, 2) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, NULL, &combined_pk, pk_hash, ncs, 2) == 1); CHECK(ecount == 1); CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, msg, NULL, pk_hash, ncs, 2) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, msg, &combined_pk, NULL, ncs, 2) == 0); CHECK(ecount == 3); CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, msg, &combined_pk, pk_hash, NULL, 2) == 0); CHECK(ecount == 4); CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, msg, &combined_pk, pk_hash, ncs, 0) == 0); CHECK(ecount == 4); if (SIZE_MAX > UINT32_MAX) { CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, msg, &combined_pk, pk_hash, ncs, ((size_t) UINT32_MAX) + 2) == 0); } CHECK(ecount == 4); CHECK(secp256k1_musig_session_initialize_verifier(none, &verifier_session, verifier_signer_data, msg, &combined_pk, pk_hash, ncs, 2) == 1); CHECK(secp256k1_musig_compute_messagehash(none, msghash, &verifier_session) == 0); CHECK(secp256k1_musig_compute_messagehash(none, msghash, &session[0]) == 0); /** Signing step 0 -- exchange nonce commitments */ ecount = 0; { secp256k1_pubkey nonce; /* Can obtain public nonce after commitments have been exchanged; still can't sign */ CHECK(secp256k1_musig_session_get_public_nonce(none, &session[0], signer0, &nonce, ncs, 2) == 1); CHECK(secp256k1_musig_partial_sign(none, &session[0], &partial_sig[0]) == 0); CHECK(ecount == 0); } /** Signing step 1 -- exchange nonces */ ecount = 0; { secp256k1_pubkey public_nonce[3]; CHECK(secp256k1_musig_session_get_public_nonce(none, &session[0], signer0, &public_nonce[0], ncs, 2) == 1); CHECK(ecount == 0); CHECK(secp256k1_musig_session_get_public_nonce(none, NULL, signer0, &public_nonce[0], ncs, 2) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_session_get_public_nonce(none, &session[0], NULL, &public_nonce[0], ncs, 2) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_session_get_public_nonce(none, &session[0], signer0, NULL, ncs, 2) == 0); CHECK(ecount == 3); CHECK(secp256k1_musig_session_get_public_nonce(none, &session[0], signer0, &public_nonce[0], NULL, 2) == 0); CHECK(ecount == 4); /* Number of commitments and number of signers are different */ CHECK(secp256k1_musig_session_get_public_nonce(none, &session[0], signer0, &public_nonce[0], ncs, 1) == 0); CHECK(ecount == 4); CHECK(secp256k1_musig_session_get_public_nonce(none, &session[0], signer0, &public_nonce[0], ncs, 2) == 1); CHECK(secp256k1_musig_session_get_public_nonce(none, &session[1], signer1, &public_nonce[1], ncs, 2) == 1); CHECK(secp256k1_musig_set_nonce(none, &signer0[0], &public_nonce[0]) == 1); CHECK(secp256k1_musig_set_nonce(none, &signer0[1], &public_nonce[0]) == 0); CHECK(secp256k1_musig_set_nonce(none, &signer0[1], &public_nonce[1]) == 1); CHECK(secp256k1_musig_set_nonce(none, &signer0[1], &public_nonce[1]) == 1); CHECK(ecount == 4); CHECK(secp256k1_musig_set_nonce(none, NULL, &public_nonce[0]) == 0); CHECK(ecount == 5); CHECK(secp256k1_musig_set_nonce(none, &signer1[0], NULL) == 0); CHECK(ecount == 6); CHECK(secp256k1_musig_set_nonce(none, &signer1[0], &public_nonce[0]) == 1); CHECK(secp256k1_musig_set_nonce(none, &signer1[1], &public_nonce[1]) == 1); CHECK(secp256k1_musig_set_nonce(none, &verifier_signer_data[0], &public_nonce[0]) == 1); CHECK(secp256k1_musig_set_nonce(none, &verifier_signer_data[1], &public_nonce[1]) == 1); ecount = 0; CHECK(secp256k1_musig_session_combine_nonces(none, &session[0], signer0, 2, &nonce_is_negated, &adaptor) == 1); CHECK(secp256k1_musig_session_combine_nonces(none, NULL, signer0, 2, &nonce_is_negated, &adaptor) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_session_combine_nonces(none, &session[0], NULL, 2, &nonce_is_negated, &adaptor) == 0); CHECK(ecount == 2); /* Number of signers differs from number during intialization */ CHECK(secp256k1_musig_session_combine_nonces(none, &session[0], signer0, 1, &nonce_is_negated, &adaptor) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_session_combine_nonces(none, &session[0], signer0, 2, NULL, &adaptor) == 1); CHECK(ecount == 2); CHECK(secp256k1_musig_session_combine_nonces(none, &session[0], signer0, 2, &nonce_is_negated, NULL) == 1); CHECK(secp256k1_musig_session_combine_nonces(none, &session[0], signer0, 2, &nonce_is_negated, &adaptor) == 1); CHECK(secp256k1_musig_session_combine_nonces(none, &session[1], signer0, 2, &nonce_is_negated, &adaptor) == 1); CHECK(secp256k1_musig_session_combine_nonces(none, &verifier_session, verifier_signer_data, 2, &nonce_is_negated, &adaptor) == 1); } /** Signing step 2 -- partial signatures */ ecount = 0; CHECK(secp256k1_musig_partial_sign(none, &session[0], &partial_sig[0]) == 1); CHECK(ecount == 0); CHECK(secp256k1_musig_partial_sign(none, NULL, &partial_sig[0]) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_partial_sign(none, &session[0], NULL) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_sign(none, &session[0], &partial_sig[0]) == 1); CHECK(secp256k1_musig_partial_sign(none, &session[1], &partial_sig[1]) == 1); /* observer can't sign */ CHECK(secp256k1_musig_partial_sign(none, &verifier_session, &partial_sig[2]) == 0); CHECK(ecount == 2); ecount = 0; CHECK(secp256k1_musig_partial_signature_serialize(none, buf, &partial_sig[0]) == 1); CHECK(secp256k1_musig_partial_signature_serialize(none, NULL, &partial_sig[0]) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_partial_signature_serialize(none, buf, NULL) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_signature_parse(none, &partial_sig[0], buf) == 1); CHECK(secp256k1_musig_partial_signature_parse(none, NULL, buf) == 0); CHECK(ecount == 3); CHECK(secp256k1_musig_partial_signature_parse(none, &partial_sig[0], NULL) == 0); CHECK(ecount == 4); CHECK(secp256k1_musig_partial_signature_parse(none, &partial_sig_overflow, ones) == 1); /** Partial signature verification */ ecount = 0; CHECK(secp256k1_musig_partial_sig_verify(none, &session[0], &signer0[0], &partial_sig[0], &pk[0]) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_partial_sig_verify(sign, &session[0], &signer0[0], &partial_sig[0], &pk[0]) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], &signer0[0], &partial_sig[0], &pk[0]) == 1); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], &signer0[0], &partial_sig[1], &pk[0]) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_sig_verify(vrfy, NULL, &signer0[0], &partial_sig[0], &pk[0]) == 0); CHECK(ecount == 3); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], NULL, &partial_sig[0], &pk[0]) == 0); CHECK(ecount == 4); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], &signer0[0], NULL, &pk[0]) == 0); CHECK(ecount == 5); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], &signer0[0], &partial_sig_overflow, &pk[0]) == 0); CHECK(ecount == 5); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], &signer0[0], &partial_sig[0], NULL) == 0); CHECK(ecount == 6); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], &signer0[0], &partial_sig[0], &pk[0]) == 1); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[1], &signer1[0], &partial_sig[0], &pk[0]) == 1); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[0], &signer0[1], &partial_sig[1], &pk[1]) == 1); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &session[1], &signer1[1], &partial_sig[1], &pk[1]) == 1); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &verifier_session, &verifier_signer_data[0], &partial_sig[0], &pk[0]) == 1); CHECK(secp256k1_musig_partial_sig_verify(vrfy, &verifier_session, &verifier_signer_data[1], &partial_sig[1], &pk[1]) == 1); CHECK(ecount == 6); /** Adaptor signature verification */ memcpy(&partial_sig_adapted[1], &partial_sig[1], sizeof(partial_sig_adapted[1])); ecount = 0; CHECK(secp256k1_musig_partial_sig_adapt(none, &partial_sig_adapted[0], &partial_sig[0], sec_adaptor, nonce_is_negated) == 1); CHECK(secp256k1_musig_partial_sig_adapt(none, NULL, &partial_sig[0], sec_adaptor, 0) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_partial_sig_adapt(none, &partial_sig_adapted[0], NULL, sec_adaptor, 0) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_sig_adapt(none, &partial_sig_adapted[0], &partial_sig_overflow, sec_adaptor, nonce_is_negated) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_sig_adapt(none, &partial_sig_adapted[0], &partial_sig[0], NULL, 0) == 0); CHECK(ecount == 3); CHECK(secp256k1_musig_partial_sig_adapt(none, &partial_sig_adapted[0], &partial_sig[0], ones, nonce_is_negated) == 0); CHECK(ecount == 3); /** Signing combining and verification */ ecount = 0; CHECK(secp256k1_musig_partial_sig_combine(none, &session[0], &final_sig, partial_sig_adapted, 2) == 1); CHECK(secp256k1_musig_partial_sig_combine(none, &session[0], &final_sig_cmp, partial_sig_adapted, 2) == 1); CHECK(memcmp(&final_sig, &final_sig_cmp, sizeof(final_sig)) == 0); CHECK(secp256k1_musig_partial_sig_combine(none, &session[0], &final_sig_cmp, partial_sig_adapted, 2) == 1); CHECK(memcmp(&final_sig, &final_sig_cmp, sizeof(final_sig)) == 0); CHECK(secp256k1_musig_partial_sig_combine(none, NULL, &final_sig, partial_sig_adapted, 2) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_partial_sig_combine(none, &session[0], NULL, partial_sig_adapted, 2) == 0); CHECK(ecount == 2); CHECK(secp256k1_musig_partial_sig_combine(none, &session[0], &final_sig, NULL, 2) == 0); CHECK(ecount == 3); { secp256k1_musig_partial_signature partial_sig_tmp[2]; partial_sig_tmp[0] = partial_sig_adapted[0]; partial_sig_tmp[1] = partial_sig_overflow; CHECK(secp256k1_musig_partial_sig_combine(none, &session[0], &final_sig, partial_sig_tmp, 2) == 0); } CHECK(ecount == 3); /* Wrong number of partial sigs */ CHECK(secp256k1_musig_partial_sig_combine(none, &session[0], &final_sig, partial_sig_adapted, 1) == 0); CHECK(ecount == 3); CHECK(secp256k1_schnorrsig_verify(vrfy, &final_sig, msg, &combined_pk) == 1); /** Secret adaptor can be extracted from signature */ ecount = 0; CHECK(secp256k1_musig_extract_secret_adaptor(none, sec_adaptor1, &final_sig, partial_sig, 2, nonce_is_negated) == 1); CHECK(memcmp(sec_adaptor, sec_adaptor1, 32) == 0); CHECK(secp256k1_musig_extract_secret_adaptor(none, NULL, &final_sig, partial_sig, 2, 0) == 0); CHECK(ecount == 1); CHECK(secp256k1_musig_extract_secret_adaptor(none, sec_adaptor1, NULL, partial_sig, 2, 0) == 0); CHECK(ecount == 2); { secp256k1_schnorrsig final_sig_tmp = final_sig; memcpy(&final_sig_tmp.data[32], ones, 32); CHECK(secp256k1_musig_extract_secret_adaptor(none, sec_adaptor1, &final_sig_tmp, partial_sig, 2, nonce_is_negated) == 0); } CHECK(ecount == 2); CHECK(secp256k1_musig_extract_secret_adaptor(none, sec_adaptor1, &final_sig, NULL, 2, 0) == 0); CHECK(ecount == 3); { secp256k1_musig_partial_signature partial_sig_tmp[2]; partial_sig_tmp[0] = partial_sig[0]; partial_sig_tmp[1] = partial_sig_overflow; CHECK(secp256k1_musig_extract_secret_adaptor(none, sec_adaptor1, &final_sig, partial_sig_tmp, 2, nonce_is_negated) == 0); } CHECK(ecount == 3); CHECK(secp256k1_musig_extract_secret_adaptor(none, sec_adaptor1, &final_sig, partial_sig, 0, 0) == 1); CHECK(secp256k1_musig_extract_secret_adaptor(none, sec_adaptor1, &final_sig, partial_sig, 2, 1) == 1); /** cleanup **/ memset(&session, 0, sizeof(session)); secp256k1_context_destroy(none); secp256k1_context_destroy(sign); secp256k1_context_destroy(vrfy); } /* Initializes two sessions, one use the given parameters (session_id, * nonce_commitments, etc.) except that `session_tmp` uses new signers with different * public keys. The point of this test is to call `musig_session_get_public_nonce` * with signers from `session_tmp` who have different public keys than the correct * ones and return the resulting messagehash. This should not result in a different * messagehash because the public keys of the signers are only used during session * initialization. */ int musig_state_machine_diff_signer_msghash_test(unsigned char *msghash, secp256k1_pubkey *pks, secp256k1_pubkey *combined_pk, unsigned char *pk_hash, const unsigned char * const *nonce_commitments, unsigned char *msg, secp256k1_pubkey *nonce_other, unsigned char *sk, unsigned char *session_id) { secp256k1_musig_session session; secp256k1_musig_session session_tmp; unsigned char nonce_commitment[32]; secp256k1_musig_session_signer_data signers[2]; secp256k1_musig_session_signer_data signers_tmp[2]; unsigned char sk_dummy[32]; secp256k1_pubkey pks_tmp[2]; secp256k1_pubkey combined_pk_tmp; unsigned char pk_hash_tmp[32]; secp256k1_pubkey nonce; /* Set up signers with different public keys */ secp256k1_rand256(sk_dummy); pks_tmp[0] = pks[0]; CHECK(secp256k1_ec_pubkey_create(ctx, &pks_tmp[1], sk_dummy) == 1); CHECK(secp256k1_musig_pubkey_combine(ctx, NULL, &combined_pk_tmp, pk_hash_tmp, pks_tmp, 2) == 1); CHECK(secp256k1_musig_session_initialize(ctx, &session_tmp, signers_tmp, nonce_commitment, session_id, msg, &combined_pk_tmp, pk_hash_tmp, 2, 0, sk_dummy) == 1); CHECK(secp256k1_musig_session_initialize(ctx, &session, signers, nonce_commitment, session_id, msg, combined_pk, pk_hash, 2, 0, sk) == 1); CHECK(memcmp(nonce_commitment, nonce_commitments[1], 32) == 0); /* Call get_public_nonce with different signers than the signers the session was * initialized with. */ CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session_tmp, signers, &nonce, nonce_commitments, 2) == 1); CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session, signers_tmp, &nonce, nonce_commitments, 2) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[0], nonce_other) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[1], &nonce) == 1); CHECK(secp256k1_musig_session_combine_nonces(ctx, &session, signers, 2, NULL, NULL) == 1); return secp256k1_musig_compute_messagehash(ctx, msghash, &session); } /* Creates a new session (with a different session id) and tries to use that session * to combine nonces with given signers_other. This should fail, because the nonce * commitments of signers_other do not match the nonce commitments the new session * was initialized with. If do_test is 0, the correct signers are being used and * therefore the function should return 1. */ int musig_state_machine_diff_signers_combine_nonce_test(secp256k1_pubkey *combined_pk, unsigned char *pk_hash, unsigned char *nonce_commitment_other, secp256k1_pubkey *nonce_other, unsigned char *msg, unsigned char *sk, secp256k1_musig_session_signer_data *signers_other, int do_test) { secp256k1_musig_session session; secp256k1_musig_session_signer_data signers[2]; secp256k1_musig_session_signer_data *signers_to_use; unsigned char nonce_commitment[32]; unsigned char session_id[32]; secp256k1_pubkey nonce; const unsigned char *ncs[2]; /* Initialize new signers */ secp256k1_rand256(session_id); CHECK(secp256k1_musig_session_initialize(ctx, &session, signers, nonce_commitment, session_id, msg, combined_pk, pk_hash, 2, 1, sk) == 1); ncs[0] = nonce_commitment_other; ncs[1] = nonce_commitment; CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session, signers, &nonce, ncs, 2) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[0], nonce_other) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[1], &nonce) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[1], &nonce) == 1); secp256k1_musig_session_combine_nonces(ctx, &session, signers_other, 2, NULL, NULL); if (do_test) { signers_to_use = signers_other; } else { signers_to_use = signers; } return secp256k1_musig_session_combine_nonces(ctx, &session, signers_to_use, 2, NULL, NULL); } /* Recreates a session with the given session_id, signers, pk, msg etc. parameters * and tries to sign and verify the other signers partial signature. Both should fail * if msg is NULL. */ int musig_state_machine_missing_msg_test(secp256k1_pubkey *pks, secp256k1_pubkey *combined_pk, unsigned char *pk_hash, unsigned char *nonce_commitment_other, secp256k1_pubkey *nonce_other, secp256k1_musig_partial_signature *partial_sig_other, unsigned char *sk, unsigned char *session_id, unsigned char *msg) { secp256k1_musig_session session; secp256k1_musig_session_signer_data signers[2]; unsigned char nonce_commitment[32]; const unsigned char *ncs[2]; secp256k1_pubkey nonce; secp256k1_musig_partial_signature partial_sig; int partial_sign, partial_verify; CHECK(secp256k1_musig_session_initialize(ctx, &session, signers, nonce_commitment, session_id, msg, combined_pk, pk_hash, 2, 0, sk) == 1); ncs[0] = nonce_commitment_other; ncs[1] = nonce_commitment; CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session, signers, &nonce, ncs, 2) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[0], nonce_other) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[1], &nonce) == 1); CHECK(secp256k1_musig_session_combine_nonces(ctx, &session, signers, 2, NULL, NULL) == 1); partial_sign = secp256k1_musig_partial_sign(ctx, &session, &partial_sig); partial_verify = secp256k1_musig_partial_sig_verify(ctx, &session, &signers[0], partial_sig_other, &pks[0]); if (msg != NULL) { /* Return 1 if both succeeded */ return partial_sign && partial_verify; } /* Return 0 if both failed */ return partial_sign || partial_verify; } /* Recreates a session with the given session_id, signers, pk, msg etc. parameters * and tries to verify and combine partial sigs. If do_combine is 0, the * combine_nonces step is left out. In that case verify and combine should fail and * this function should return 0. */ int musig_state_machine_missing_combine_test(secp256k1_pubkey *pks, secp256k1_pubkey *combined_pk, unsigned char *pk_hash, unsigned char *nonce_commitment_other, secp256k1_pubkey *nonce_other, secp256k1_musig_partial_signature *partial_sig_other, unsigned char *msg, unsigned char *sk, unsigned char *session_id, secp256k1_musig_partial_signature *partial_sig, int do_combine) { secp256k1_musig_session session; secp256k1_musig_session_signer_data signers[2]; unsigned char nonce_commitment[32]; const unsigned char *ncs[2]; secp256k1_pubkey nonce; secp256k1_musig_partial_signature partial_sigs[2]; secp256k1_schnorrsig sig; int partial_verify, sig_combine; CHECK(secp256k1_musig_session_initialize(ctx, &session, signers, nonce_commitment, session_id, msg, combined_pk, pk_hash, 2, 0, sk) == 1); ncs[0] = nonce_commitment_other; ncs[1] = nonce_commitment; CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session, signers, &nonce, ncs, 2) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[0], nonce_other) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers[1], &nonce) == 1); partial_sigs[0] = *partial_sig_other; partial_sigs[1] = *partial_sig; if (do_combine != 0) { CHECK(secp256k1_musig_session_combine_nonces(ctx, &session, signers, 2, NULL, NULL) == 1); } partial_verify = secp256k1_musig_partial_sig_verify(ctx, &session, signers, partial_sig_other, &pks[0]); sig_combine = secp256k1_musig_partial_sig_combine(ctx, &session, &sig, partial_sigs, 2); if (do_combine != 0) { /* Return 1 if both succeeded */ return partial_verify && sig_combine; } /* Return 0 if both failed */ return partial_verify || sig_combine; } void musig_state_machine_tests(secp256k1_scratch_space *scratch) { size_t i; secp256k1_musig_session session[2]; secp256k1_musig_session_signer_data signers0[2]; secp256k1_musig_session_signer_data signers1[2]; unsigned char nonce_commitment[2][32]; unsigned char session_id[2][32]; unsigned char msg[32]; unsigned char sk[2][32]; secp256k1_pubkey pk[2]; secp256k1_pubkey combined_pk; unsigned char pk_hash[32]; secp256k1_pubkey nonce[2]; const unsigned char *ncs[2]; secp256k1_musig_partial_signature partial_sig[2]; unsigned char msghash1[32]; unsigned char msghash2[32]; /* Run state machine with the same objects twice to test that it's allowed to * reinitialize session and session_signer_data. */ for (i = 0; i < 2; i++) { /* Setup */ secp256k1_rand256(session_id[0]); secp256k1_rand256(session_id[1]); secp256k1_rand256(sk[0]); secp256k1_rand256(sk[1]); secp256k1_rand256(msg); CHECK(secp256k1_ec_pubkey_create(ctx, &pk[0], sk[0]) == 1); CHECK(secp256k1_ec_pubkey_create(ctx, &pk[1], sk[1]) == 1); CHECK(secp256k1_musig_pubkey_combine(ctx, scratch, &combined_pk, pk_hash, pk, 2) == 1); CHECK(secp256k1_musig_session_initialize(ctx, &session[0], signers0, nonce_commitment[0], session_id[0], msg, &combined_pk, pk_hash, 2, 0, sk[0]) == 1); CHECK(secp256k1_musig_session_initialize(ctx, &session[1], signers1, nonce_commitment[1], session_id[1], msg, &combined_pk, pk_hash, 2, 1, sk[1]) == 1); /* Set nonce commitments */ ncs[0] = nonce_commitment[0]; ncs[1] = nonce_commitment[1]; CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session[0], signers0, &nonce[0], ncs, 2) == 1); /* Changing a nonce commitment is not okay */ ncs[1] = (unsigned char*) "this isn't a nonce commitment..."; CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session[0], signers0, &nonce[0], ncs, 2) == 0); /* Repeating with the same nonce commitments is okay */ ncs[1] = nonce_commitment[1]; CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session[0], signers0, &nonce[0], ncs, 2) == 1); /* Get nonce for signer 1 */ CHECK(secp256k1_musig_session_get_public_nonce(ctx, &session[1], signers1, &nonce[1], ncs, 2) == 1); /* Set nonces */ CHECK(secp256k1_musig_set_nonce(ctx, &signers0[0], &nonce[0]) == 1); /* Can't set nonce that doesn't match nonce commitment */ CHECK(secp256k1_musig_set_nonce(ctx, &signers0[1], &nonce[0]) == 0); /* Set correct nonce */ CHECK(secp256k1_musig_set_nonce(ctx, &signers0[1], &nonce[1]) == 1); /* Combine nonces */ CHECK(secp256k1_musig_session_combine_nonces(ctx, &session[0], signers0, 2, NULL, NULL) == 1); /* Not everyone is present from signer 1's view */ CHECK(secp256k1_musig_session_combine_nonces(ctx, &session[1], signers1, 2, NULL, NULL) == 0); /* Make everyone present */ CHECK(secp256k1_musig_set_nonce(ctx, &signers1[0], &nonce[0]) == 1); CHECK(secp256k1_musig_set_nonce(ctx, &signers1[1], &nonce[1]) == 1); /* Can't combine nonces from signers of a different session */ CHECK(musig_state_machine_diff_signers_combine_nonce_test(&combined_pk, pk_hash, nonce_commitment[0], &nonce[0], msg, sk[1], signers1, 1) == 0); CHECK(musig_state_machine_diff_signers_combine_nonce_test(&combined_pk, pk_hash, nonce_commitment[0], &nonce[0], msg, sk[1], signers1, 0) == 1); /* Partially sign */ CHECK(secp256k1_musig_partial_sign(ctx, &session[0], &partial_sig[0]) == 1); /* Can't verify or sign until nonce is combined */ CHECK(secp256k1_musig_partial_sig_verify(ctx, &session[1], &signers1[0], &partial_sig[0], &pk[0]) == 0); CHECK(secp256k1_musig_partial_sign(ctx, &session[1], &partial_sig[1]) == 0); CHECK(secp256k1_musig_session_combine_nonces(ctx, &session[1], signers1, 2, NULL, NULL) == 1); CHECK(secp256k1_musig_partial_sig_verify(ctx, &session[1], &signers1[0], &partial_sig[0], &pk[0]) == 1); /* messagehash should be the same as a session whose get_public_nonce was called * with different signers (i.e. they diff in public keys). This is because the * public keys of the signers is set in stone when initializing the session. */ CHECK(secp256k1_musig_compute_messagehash(ctx, msghash1, &session[1]) == 1); CHECK(musig_state_machine_diff_signer_msghash_test(msghash2, pk, &combined_pk, pk_hash, ncs, msg, &nonce[0], sk[1], session_id[1]) == 1); CHECK(memcmp(msghash1, msghash2, 32) == 0); CHECK(secp256k1_musig_partial_sign(ctx, &session[1], &partial_sig[1]) == 1); CHECK(secp256k1_musig_partial_sig_verify(ctx, &session[1], &signers1[1], &partial_sig[1], &pk[1]) == 1); /* Wrong signature */ CHECK(secp256k1_musig_partial_sig_verify(ctx, &session[1], &signers1[1], &partial_sig[0], &pk[1]) == 0); /* Can't sign or verify until msg is set */ CHECK(musig_state_machine_missing_msg_test(pk, &combined_pk, pk_hash, nonce_commitment[0], &nonce[0], &partial_sig[0], sk[1], session_id[1], NULL) == 0); CHECK(musig_state_machine_missing_msg_test(pk, &combined_pk, pk_hash, nonce_commitment[0], &nonce[0], &partial_sig[0], sk[1], session_id[1], msg) == 1); /* Can't verify and combine partial sigs until nonces are combined */ CHECK(musig_state_machine_missing_combine_test(pk, &combined_pk, pk_hash, nonce_commitment[0], &nonce[0], &partial_sig[0], msg, sk[1], session_id[1], &partial_sig[1], 0) == 0); CHECK(musig_state_machine_missing_combine_test(pk, &combined_pk, pk_hash, nonce_commitment[0], &nonce[0], &partial_sig[0], msg, sk[1], session_id[1], &partial_sig[1], 1) == 1); } } void scriptless_atomic_swap(secp256k1_scratch_space *scratch) { /* Throughout this test "a" and "b" refer to two hypothetical blockchains, * while the indices 0 and 1 refer to the two signers. Here signer 0 is * sending a-coins to signer 1, while signer 1 is sending b-coins to signer * 0. Signer 0 produces the adaptor signatures. */ secp256k1_schnorrsig final_sig_a; secp256k1_schnorrsig final_sig_b; secp256k1_musig_partial_signature partial_sig_a[2]; secp256k1_musig_partial_signature partial_sig_b_adapted[2]; secp256k1_musig_partial_signature partial_sig_b[2]; unsigned char sec_adaptor[32]; unsigned char sec_adaptor_extracted[32]; secp256k1_pubkey pub_adaptor; unsigned char seckey_a[2][32]; unsigned char seckey_b[2][32]; secp256k1_pubkey pk_a[2]; secp256k1_pubkey pk_b[2]; unsigned char pk_hash_a[32]; unsigned char pk_hash_b[32]; secp256k1_pubkey combined_pk_a; secp256k1_pubkey combined_pk_b; secp256k1_musig_session musig_session_a[2]; secp256k1_musig_session musig_session_b[2]; unsigned char noncommit_a[2][32]; unsigned char noncommit_b[2][32]; const unsigned char *noncommit_a_ptr[2]; const unsigned char *noncommit_b_ptr[2]; secp256k1_pubkey pubnon_a[2]; secp256k1_pubkey pubnon_b[2]; int nonce_is_negated_a; int nonce_is_negated_b; secp256k1_musig_session_signer_data data_a[2]; secp256k1_musig_session_signer_data data_b[2]; const unsigned char seed[32] = "still tired of choosing seeds..."; const unsigned char msg32_a[32] = "this is the message blockchain a"; const unsigned char msg32_b[32] = "this is the message blockchain b"; /* Step 1: key setup */ secp256k1_rand256(seckey_a[0]); secp256k1_rand256(seckey_a[1]); secp256k1_rand256(seckey_b[0]); secp256k1_rand256(seckey_b[1]); secp256k1_rand256(sec_adaptor); CHECK(secp256k1_ec_pubkey_create(ctx, &pk_a[0], seckey_a[0])); CHECK(secp256k1_ec_pubkey_create(ctx, &pk_a[1], seckey_a[1])); CHECK(secp256k1_ec_pubkey_create(ctx, &pk_b[0], seckey_b[0])); CHECK(secp256k1_ec_pubkey_create(ctx, &pk_b[1], seckey_b[1])); CHECK(secp256k1_ec_pubkey_create(ctx, &pub_adaptor, sec_adaptor)); CHECK(secp256k1_musig_pubkey_combine(ctx, scratch, &combined_pk_a, pk_hash_a, pk_a, 2)); CHECK(secp256k1_musig_pubkey_combine(ctx, scratch, &combined_pk_b, pk_hash_b, pk_b, 2)); CHECK(secp256k1_musig_session_initialize(ctx, &musig_session_a[0], data_a, noncommit_a[0], seed, msg32_a, &combined_pk_a, pk_hash_a, 2, 0, seckey_a[0])); CHECK(secp256k1_musig_session_initialize(ctx, &musig_session_a[1], data_a, noncommit_a[1], seed, msg32_a, &combined_pk_a, pk_hash_a, 2, 1, seckey_a[1])); noncommit_a_ptr[0] = noncommit_a[0]; noncommit_a_ptr[1] = noncommit_a[1]; CHECK(secp256k1_musig_session_initialize(ctx, &musig_session_b[0], data_b, noncommit_b[0], seed, msg32_b, &combined_pk_b, pk_hash_b, 2, 0, seckey_b[0])); CHECK(secp256k1_musig_session_initialize(ctx, &musig_session_b[1], data_b, noncommit_b[1], seed, msg32_b, &combined_pk_b, pk_hash_b, 2, 1, seckey_b[1])); noncommit_b_ptr[0] = noncommit_b[0]; noncommit_b_ptr[1] = noncommit_b[1]; /* Step 2: Exchange nonces */ CHECK(secp256k1_musig_session_get_public_nonce(ctx, &musig_session_a[0], data_a, &pubnon_a[0], noncommit_a_ptr, 2)); CHECK(secp256k1_musig_session_get_public_nonce(ctx, &musig_session_a[1], data_a, &pubnon_a[1], noncommit_a_ptr, 2)); CHECK(secp256k1_musig_session_get_public_nonce(ctx, &musig_session_b[0], data_b, &pubnon_b[0], noncommit_b_ptr, 2)); CHECK(secp256k1_musig_session_get_public_nonce(ctx, &musig_session_b[1], data_b, &pubnon_b[1], noncommit_b_ptr, 2)); CHECK(secp256k1_musig_set_nonce(ctx, &data_a[0], &pubnon_a[0])); CHECK(secp256k1_musig_set_nonce(ctx, &data_a[1], &pubnon_a[1])); CHECK(secp256k1_musig_set_nonce(ctx, &data_b[0], &pubnon_b[0])); CHECK(secp256k1_musig_set_nonce(ctx, &data_b[1], &pubnon_b[1])); CHECK(secp256k1_musig_session_combine_nonces(ctx, &musig_session_a[0], data_a, 2, &nonce_is_negated_a, &pub_adaptor)); CHECK(secp256k1_musig_session_combine_nonces(ctx, &musig_session_a[1], data_a, 2, NULL, &pub_adaptor)); CHECK(secp256k1_musig_session_combine_nonces(ctx, &musig_session_b[0], data_b, 2, &nonce_is_negated_b, &pub_adaptor)); CHECK(secp256k1_musig_session_combine_nonces(ctx, &musig_session_b[1], data_b, 2, NULL, &pub_adaptor)); /* Step 3: Signer 0 produces partial signatures for both chains. */ CHECK(secp256k1_musig_partial_sign(ctx, &musig_session_a[0], &partial_sig_a[0])); CHECK(secp256k1_musig_partial_sign(ctx, &musig_session_b[0], &partial_sig_b[0])); /* Step 4: Signer 1 receives partial signatures, verifies them and creates a * partial signature to send B-coins to signer 0. */ CHECK(secp256k1_musig_partial_sig_verify(ctx, &musig_session_a[1], data_a, &partial_sig_a[0], &pk_a[0]) == 1); CHECK(secp256k1_musig_partial_sig_verify(ctx, &musig_session_b[1], data_b, &partial_sig_b[0], &pk_b[0]) == 1); CHECK(secp256k1_musig_partial_sign(ctx, &musig_session_b[1], &partial_sig_b[1])); /* Step 5: Signer 0 adapts its own partial signature and combines it with the * partial signature from signer 1. This results in a complete signature which * is broadcasted by signer 0 to take B-coins. */ CHECK(secp256k1_musig_partial_sig_adapt(ctx, &partial_sig_b_adapted[0], &partial_sig_b[0], sec_adaptor, nonce_is_negated_b)); memcpy(&partial_sig_b_adapted[1], &partial_sig_b[1], sizeof(partial_sig_b_adapted[1])); CHECK(secp256k1_musig_partial_sig_combine(ctx, &musig_session_b[0], &final_sig_b, partial_sig_b_adapted, 2) == 1); CHECK(secp256k1_schnorrsig_verify(ctx, &final_sig_b, msg32_b, &combined_pk_b) == 1); /* Step 6: Signer 1 extracts adaptor from the published signature, applies it to * other partial signature, and takes A-coins. */ CHECK(secp256k1_musig_extract_secret_adaptor(ctx, sec_adaptor_extracted, &final_sig_b, partial_sig_b, 2, nonce_is_negated_b) == 1); CHECK(memcmp(sec_adaptor_extracted, sec_adaptor, sizeof(sec_adaptor)) == 0); /* in real life we couldn't check this, of course */ CHECK(secp256k1_musig_partial_sig_adapt(ctx, &partial_sig_a[0], &partial_sig_a[0], sec_adaptor_extracted, nonce_is_negated_a)); CHECK(secp256k1_musig_partial_sign(ctx, &musig_session_a[1], &partial_sig_a[1])); CHECK(secp256k1_musig_partial_sig_combine(ctx, &musig_session_a[1], &final_sig_a, partial_sig_a, 2) == 1); CHECK(secp256k1_schnorrsig_verify(ctx, &final_sig_a, msg32_a, &combined_pk_a) == 1); } /* Checks that hash initialized by secp256k1_musig_sha256_init_tagged has the * expected state. */ void sha256_tag_test(void) { char tag[17] = "MuSig coefficient"; secp256k1_sha256 sha; secp256k1_sha256 sha_tagged; unsigned char buf[32]; unsigned char buf2[32]; size_t i; secp256k1_sha256_initialize(&sha); secp256k1_sha256_write(&sha, (unsigned char *) tag, 17); secp256k1_sha256_finalize(&sha, buf); /* buf = SHA256("MuSig coefficient") */ secp256k1_sha256_initialize(&sha); secp256k1_sha256_write(&sha, buf, 32); secp256k1_sha256_write(&sha, buf, 32); /* Is buffer fully consumed? */ CHECK((sha.bytes & 0x3F) == 0); /* Compare with tagged SHA */ secp256k1_musig_sha256_init_tagged(&sha_tagged); for (i = 0; i < 8; i++) { CHECK(sha_tagged.s[i] == sha.s[i]); } secp256k1_sha256_write(&sha, buf, 32); secp256k1_sha256_write(&sha_tagged, buf, 32); secp256k1_sha256_finalize(&sha, buf); secp256k1_sha256_finalize(&sha_tagged, buf2); CHECK(memcmp(buf, buf2, 32) == 0); } void run_musig_tests(void) { int i; secp256k1_scratch_space *scratch = secp256k1_scratch_space_create(ctx, 1024 * 1024); musig_api_tests(scratch); musig_state_machine_tests(scratch); for (i = 0; i < count; i++) { /* Run multiple times to ensure that the nonce is negated in some tests */ scriptless_atomic_swap(scratch); } sha256_tag_test(); secp256k1_scratch_space_destroy(ctx, scratch); } #endif