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/*
* Copyright (C) 2019 Red Hat, Inc.
*
* Author: Daiki Ueno
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "ecdsa-compute-k.h"
#include "dsa-compute-k.h"
#include "gnutls_int.h"
static inline int
_gnutls_ecc_curve_to_dsa_q(mpz_t *q, gnutls_ecc_curve_t curve)
{
switch (curve) {
#ifdef ENABLE_NON_SUITEB_CURVES
case GNUTLS_ECC_CURVE_SECP192R1:
mpz_init_set_str(*q,
"FFFFFFFFFFFFFFFFFFFFFFFF99DEF836"
"146BC9B1B4D22831",
16);
return 0;
case GNUTLS_ECC_CURVE_SECP224R1:
mpz_init_set_str(*q,
"FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2"
"E0B8F03E13DD29455C5C2A3D",
16);
return 0;
#endif
case GNUTLS_ECC_CURVE_SECP256R1:
mpz_init_set_str(*q,
"FFFFFFFF00000000FFFFFFFFFFFFFFFF"
"BCE6FAADA7179E84F3B9CAC2FC632551",
16);
return 0;
case GNUTLS_ECC_CURVE_SECP384R1:
mpz_init_set_str(*q,
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFC7634D81F4372DDF"
"581A0DB248B0A77AECEC196ACCC52973",
16);
return 0;
case GNUTLS_ECC_CURVE_SECP521R1:
mpz_init_set_str(*q,
"1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
"FFA51868783BF2F966B7FCC0148F709A"
"5D03BB5C9B8899C47AEBB6FB71E91386"
"409",
16);
return 0;
default:
return gnutls_assert_val(GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM);
}
}
int
_gnutls_ecdsa_compute_k (mpz_t k,
gnutls_ecc_curve_t curve,
const mpz_t x,
gnutls_mac_algorithm_t mac,
const uint8_t *digest,
size_t length)
{
mpz_t q;
int ret;
ret = _gnutls_ecc_curve_to_dsa_q(&q, curve);
if (ret < 0)
return gnutls_assert_val(ret);
ret = _gnutls_dsa_compute_k (k, q, x, mac, digest, length);
mpz_clear(q);
return ret;
}
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