94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <ell/ell.h>
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/* 256-bit curve */
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#define ECC_BYTES 32
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/* Number of uint64_t's needed */
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#define NUM_ECC_DIGITS (ECC_BYTES / 8)
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#define CURVE_P_32 { 0xFFFFFFFFFFFFFFFFull, 0x00000000FFFFFFFFull, \
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0x0000000000000000ull, 0xFFFFFFFF00000001ull }
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#define CURVE_G_32 { \
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{ 0xF4A13945D898C296ull, 0x77037D812DEB33A0ull, \
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0xF8BCE6E563A440F2ull, 0x6B17D1F2E12C4247ull }, \
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{ 0xCBB6406837BF51F5ull, 0x2BCE33576B315ECEull, \
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0x8EE7EB4A7C0F9E16ull, 0x4FE342E2FE1A7F9Bull } \
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}
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#define CURVE_N_32 { 0xF3B9CAC2FC632551ull, 0xBCE6FAADA7179E84ull, \
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0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFF00000000ull }
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#define CURVE_B_32 { 0x3BCE3C3E27D2604Bull, 0x651D06B0CC53B0F6ull, \
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0xB3EBBD55769886BCull, 0x5AC635D8AA3A93E7ull }
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struct ecc_point {
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uint64_t x[NUM_ECC_DIGITS];
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uint64_t y[NUM_ECC_DIGITS];
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};
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void ecc_point_mult(struct ecc_point *result, const struct ecc_point *point,
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uint64_t *scalar, uint64_t *initial_z, int num_bits);
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void ecc_point_add(struct ecc_point *ret, struct ecc_point *p,
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struct ecc_point *q);
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bool ecc_valid_point(struct ecc_point *point);
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void ecc_be2native(uint64_t bytes[NUM_ECC_DIGITS]);
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void ecc_native2be(uint64_t native[NUM_ECC_DIGITS]);
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bool ecc_compute_y(uint64_t *y, uint64_t *x);
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void vli_mod_inv(uint64_t *result, const uint64_t *input, const uint64_t *mod);
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void vli_mod_sub(uint64_t *result, const uint64_t *left, const uint64_t *right,
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const uint64_t *mod);
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void vli_mod_add(uint64_t *result, const uint64_t *left, const uint64_t *right,
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const uint64_t *mod);
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uint64_t vli_sub(uint64_t *result, const uint64_t *left, const uint64_t *right);
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void vli_mod_mult_fast(uint64_t *result, const uint64_t *left,
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const uint64_t *right);
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void vli_mod_exp(uint64_t *result, uint64_t *base, uint64_t *exp,
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const uint64_t *mod);
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int vli_cmp(const uint64_t *left, const uint64_t *right);
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unsigned int vli_num_bits(const uint64_t *vli);
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int vli_legendre(uint64_t *val, const uint64_t *p);
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void ecc_compute_y_sqr(uint64_t *y_sqr, uint64_t *x);
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