mirror of https://github.com/bitcoin/bitcoin
69 lines
3.1 KiB
C
69 lines
3.1 KiB
C
/***********************************************************************
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* Copyright (c) 2020 Pieter Wuille *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or https://www.opensource.org/licenses/mit-license.php.*
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***********************************************************************/
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#ifndef SECP256K1_MODULE_EXTRAKEYS_TESTS_EXHAUSTIVE_H
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#define SECP256K1_MODULE_EXTRAKEYS_TESTS_EXHAUSTIVE_H
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#include "../../../include/secp256k1_extrakeys.h"
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#include "main_impl.h"
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static void test_exhaustive_extrakeys(const secp256k1_context *ctx, const secp256k1_ge* group) {
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secp256k1_keypair keypair[EXHAUSTIVE_TEST_ORDER - 1];
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secp256k1_pubkey pubkey[EXHAUSTIVE_TEST_ORDER - 1];
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secp256k1_xonly_pubkey xonly_pubkey[EXHAUSTIVE_TEST_ORDER - 1];
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int parities[EXHAUSTIVE_TEST_ORDER - 1];
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unsigned char xonly_pubkey_bytes[EXHAUSTIVE_TEST_ORDER - 1][32];
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int i;
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for (i = 1; i < EXHAUSTIVE_TEST_ORDER; i++) {
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secp256k1_fe fe;
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secp256k1_scalar scalar_i;
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unsigned char buf[33];
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int parity;
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secp256k1_scalar_set_int(&scalar_i, i);
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secp256k1_scalar_get_b32(buf, &scalar_i);
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/* Construct pubkey and keypair. */
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CHECK(secp256k1_keypair_create(ctx, &keypair[i - 1], buf));
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CHECK(secp256k1_ec_pubkey_create(ctx, &pubkey[i - 1], buf));
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/* Construct serialized xonly_pubkey from keypair. */
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CHECK(secp256k1_keypair_xonly_pub(ctx, &xonly_pubkey[i - 1], &parities[i - 1], &keypair[i - 1]));
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CHECK(secp256k1_xonly_pubkey_serialize(ctx, xonly_pubkey_bytes[i - 1], &xonly_pubkey[i - 1]));
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/* Parse the xonly_pubkey back and verify it matches the previously serialized value. */
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CHECK(secp256k1_xonly_pubkey_parse(ctx, &xonly_pubkey[i - 1], xonly_pubkey_bytes[i - 1]));
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CHECK(secp256k1_xonly_pubkey_serialize(ctx, buf, &xonly_pubkey[i - 1]));
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CHECK(secp256k1_memcmp_var(xonly_pubkey_bytes[i - 1], buf, 32) == 0);
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/* Construct the xonly_pubkey from the pubkey, and verify it matches the same. */
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CHECK(secp256k1_xonly_pubkey_from_pubkey(ctx, &xonly_pubkey[i - 1], &parity, &pubkey[i - 1]));
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CHECK(parity == parities[i - 1]);
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CHECK(secp256k1_xonly_pubkey_serialize(ctx, buf, &xonly_pubkey[i - 1]));
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CHECK(secp256k1_memcmp_var(xonly_pubkey_bytes[i - 1], buf, 32) == 0);
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/* Compare the xonly_pubkey bytes against the precomputed group. */
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secp256k1_fe_set_b32(&fe, xonly_pubkey_bytes[i - 1]);
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CHECK(secp256k1_fe_equal_var(&fe, &group[i].x));
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/* Check the parity against the precomputed group. */
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fe = group[i].y;
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secp256k1_fe_normalize_var(&fe);
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CHECK(secp256k1_fe_is_odd(&fe) == parities[i - 1]);
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/* Verify that the higher half is identical to the lower half mirrored. */
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if (i > EXHAUSTIVE_TEST_ORDER / 2) {
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CHECK(secp256k1_memcmp_var(xonly_pubkey_bytes[i - 1], xonly_pubkey_bytes[EXHAUSTIVE_TEST_ORDER - i - 1], 32) == 0);
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CHECK(parities[i - 1] == 1 - parities[EXHAUSTIVE_TEST_ORDER - i - 1]);
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}
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}
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/* TODO: keypair/xonly_pubkey tweak tests */
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}
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#endif
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