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/**********************************************************************
* Copyright (c) 2020 Pieter Wuille *
* Distributed under the MIT software license, see the accompanying *
* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
**********************************************************************/
#ifndef _SECP256K1_MODULE_EXTRAKEYS_TESTS_EXHAUSTIVE_
#define _SECP256K1_MODULE_EXTRAKEYS_TESTS_EXHAUSTIVE_
#include "src/modules/extrakeys/main_impl.h"
#include "include/secp256k1_extrakeys.h"
static void test_exhaustive_extrakeys(const secp256k1_context *ctx, const secp256k1_ge* group) {
secp256k1_keypair keypair[EXHAUSTIVE_TEST_ORDER - 1];
secp256k1_pubkey pubkey[EXHAUSTIVE_TEST_ORDER - 1];
secp256k1_xonly_pubkey xonly_pubkey[EXHAUSTIVE_TEST_ORDER - 1];
int parities[EXHAUSTIVE_TEST_ORDER - 1];
unsigned char xonly_pubkey_bytes[EXHAUSTIVE_TEST_ORDER - 1][32];
int i;
for (i = 1; i < EXHAUSTIVE_TEST_ORDER; i++) {
secp256k1_fe fe;
secp256k1_scalar scalar_i;
unsigned char buf[33];
int parity;
secp256k1_scalar_set_int(&scalar_i, i);
secp256k1_scalar_get_b32(buf, &scalar_i);
/* Construct pubkey and keypair. */
CHECK(secp256k1_keypair_create(ctx, &keypair[i - 1], buf));
CHECK(secp256k1_ec_pubkey_create(ctx, &pubkey[i - 1], buf));
/* Construct serialized xonly_pubkey from keypair. */
CHECK(secp256k1_keypair_xonly_pub(ctx, &xonly_pubkey[i - 1], &parities[i - 1], &keypair[i - 1]));
CHECK(secp256k1_xonly_pubkey_serialize(ctx, xonly_pubkey_bytes[i - 1], &xonly_pubkey[i - 1]));
/* Parse the xonly_pubkey back and verify it matches the previously serialized value. */
CHECK(secp256k1_xonly_pubkey_parse(ctx, &xonly_pubkey[i - 1], xonly_pubkey_bytes[i - 1]));
CHECK(secp256k1_xonly_pubkey_serialize(ctx, buf, &xonly_pubkey[i - 1]));
CHECK(secp256k1_memcmp_var(xonly_pubkey_bytes[i - 1], buf, 32) == 0);
/* Construct the xonly_pubkey from the pubkey, and verify it matches the same. */
CHECK(secp256k1_xonly_pubkey_from_pubkey(ctx, &xonly_pubkey[i - 1], &parity, &pubkey[i - 1]));
CHECK(parity == parities[i - 1]);
CHECK(secp256k1_xonly_pubkey_serialize(ctx, buf, &xonly_pubkey[i - 1]));
CHECK(secp256k1_memcmp_var(xonly_pubkey_bytes[i - 1], buf, 32) == 0);
/* Compare the xonly_pubkey bytes against the precomputed group. */
secp256k1_fe_set_b32(&fe, xonly_pubkey_bytes[i - 1]);
CHECK(secp256k1_fe_equal_var(&fe, &group[i].x));
/* Check the parity against the precomputed group. */
fe = group[i].y;
secp256k1_fe_normalize_var(&fe);
CHECK(secp256k1_fe_is_odd(&fe) == parities[i - 1]);
/* Verify that the higher half is identical to the lower half mirrored. */
if (i > EXHAUSTIVE_TEST_ORDER / 2) {
CHECK(secp256k1_memcmp_var(xonly_pubkey_bytes[i - 1], xonly_pubkey_bytes[EXHAUSTIVE_TEST_ORDER - i - 1], 32) == 0);
CHECK(parities[i - 1] == 1 - parities[EXHAUSTIVE_TEST_ORDER - i - 1]);
}
}
/* TODO: keypair/xonly_pubkey tweak tests */
}
#endif
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