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pineappleEA
318
externals/libressl/crypto/gost/gostr341001_key.c
vendored
Executable file
318
externals/libressl/crypto/gost/gostr341001_key.c
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/* $OpenBSD: gostr341001_key.c,v 1.8 2017/05/02 03:59:44 deraadt Exp $ */
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/*
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* Copyright (c) 2014 Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Copyright (c) 2005-2006 Cryptocom LTD
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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#include <string.h>
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#include <openssl/opensslconf.h>
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#ifndef OPENSSL_NO_GOST
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/gost.h>
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#include <openssl/objects.h>
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#include "gost_locl.h"
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struct gost_key_st {
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EC_GROUP *group;
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EC_POINT *pub_key;
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BIGNUM *priv_key;
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int references;
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int digest_nid;
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};
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GOST_KEY *
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GOST_KEY_new(void)
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{
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GOST_KEY *ret;
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ret = malloc(sizeof(GOST_KEY));
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if (ret == NULL) {
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GOSTerror(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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ret->group = NULL;
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ret->pub_key = NULL;
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ret->priv_key = NULL;
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ret->references = 1;
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ret->digest_nid = NID_undef;
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return (ret);
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}
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void
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GOST_KEY_free(GOST_KEY *r)
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{
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int i;
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if (r == NULL)
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return;
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i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC);
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if (i > 0)
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return;
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EC_GROUP_free(r->group);
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EC_POINT_free(r->pub_key);
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BN_clear_free(r->priv_key);
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freezero(r, sizeof(GOST_KEY));
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}
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int
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GOST_KEY_check_key(const GOST_KEY *key)
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{
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int ok = 0;
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BN_CTX *ctx = NULL;
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BIGNUM *order = NULL;
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EC_POINT *point = NULL;
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if (key == NULL || key->group == NULL || key->pub_key == NULL) {
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GOSTerror(ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if (EC_POINT_is_at_infinity(key->group, key->pub_key) != 0) {
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GOSTerror(EC_R_POINT_AT_INFINITY);
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goto err;
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}
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if ((ctx = BN_CTX_new()) == NULL)
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goto err;
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if ((point = EC_POINT_new(key->group)) == NULL)
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goto err;
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/* testing whether the pub_key is on the elliptic curve */
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if (EC_POINT_is_on_curve(key->group, key->pub_key, ctx) == 0) {
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GOSTerror(EC_R_POINT_IS_NOT_ON_CURVE);
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goto err;
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}
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/* testing whether pub_key * order is the point at infinity */
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if ((order = BN_new()) == NULL)
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goto err;
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if (EC_GROUP_get_order(key->group, order, ctx) == 0) {
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GOSTerror(EC_R_INVALID_GROUP_ORDER);
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goto err;
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}
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if (EC_POINT_mul(key->group, point, NULL, key->pub_key, order,
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ctx) == 0) {
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GOSTerror(ERR_R_EC_LIB);
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goto err;
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}
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if (EC_POINT_is_at_infinity(key->group, point) == 0) {
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GOSTerror(EC_R_WRONG_ORDER);
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goto err;
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}
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/*
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* in case the priv_key is present : check if generator * priv_key ==
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* pub_key
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*/
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if (key->priv_key != NULL) {
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if (BN_cmp(key->priv_key, order) >= 0) {
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GOSTerror(EC_R_WRONG_ORDER);
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goto err;
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}
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if (EC_POINT_mul(key->group, point, key->priv_key, NULL, NULL,
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ctx) == 0) {
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GOSTerror(ERR_R_EC_LIB);
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goto err;
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}
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if (EC_POINT_cmp(key->group, point, key->pub_key, ctx) != 0) {
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GOSTerror(EC_R_INVALID_PRIVATE_KEY);
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goto err;
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}
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}
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ok = 1;
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err:
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BN_free(order);
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BN_CTX_free(ctx);
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EC_POINT_free(point);
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return (ok);
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}
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int
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GOST_KEY_set_public_key_affine_coordinates(GOST_KEY *key, BIGNUM *x, BIGNUM *y)
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{
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BN_CTX *ctx = NULL;
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BIGNUM *tx, *ty;
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EC_POINT *point = NULL;
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int ok = 0;
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if (key == NULL || key->group == NULL || x == NULL || y == NULL) {
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GOSTerror(ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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ctx = BN_CTX_new();
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if (ctx == NULL)
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goto err;
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point = EC_POINT_new(key->group);
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if (point == NULL)
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goto err;
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if ((tx = BN_CTX_get(ctx)) == NULL)
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goto err;
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if ((ty = BN_CTX_get(ctx)) == NULL)
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goto err;
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if (EC_POINT_set_affine_coordinates_GFp(key->group, point, x, y,
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ctx) == 0)
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goto err;
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if (EC_POINT_get_affine_coordinates_GFp(key->group, point, tx, ty,
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ctx) == 0)
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goto err;
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/*
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* Check if retrieved coordinates match originals: if not, values are
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* out of range.
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*/
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if (BN_cmp(x, tx) != 0 || BN_cmp(y, ty) != 0) {
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GOSTerror(EC_R_COORDINATES_OUT_OF_RANGE);
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goto err;
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}
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if (GOST_KEY_set_public_key(key, point) == 0)
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goto err;
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if (GOST_KEY_check_key(key) == 0)
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goto err;
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ok = 1;
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err:
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EC_POINT_free(point);
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BN_CTX_free(ctx);
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return ok;
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}
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const EC_GROUP *
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GOST_KEY_get0_group(const GOST_KEY *key)
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{
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return key->group;
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}
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int
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GOST_KEY_set_group(GOST_KEY *key, const EC_GROUP *group)
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{
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EC_GROUP_free(key->group);
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key->group = EC_GROUP_dup(group);
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return (key->group == NULL) ? 0 : 1;
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}
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const BIGNUM *
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GOST_KEY_get0_private_key(const GOST_KEY *key)
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{
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return key->priv_key;
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}
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int
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GOST_KEY_set_private_key(GOST_KEY *key, const BIGNUM *priv_key)
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{
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BN_clear_free(key->priv_key);
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key->priv_key = BN_dup(priv_key);
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return (key->priv_key == NULL) ? 0 : 1;
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}
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const EC_POINT *
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GOST_KEY_get0_public_key(const GOST_KEY *key)
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{
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return key->pub_key;
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}
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int
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GOST_KEY_set_public_key(GOST_KEY *key, const EC_POINT *pub_key)
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{
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EC_POINT_free(key->pub_key);
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key->pub_key = EC_POINT_dup(pub_key, key->group);
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return (key->pub_key == NULL) ? 0 : 1;
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}
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int
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GOST_KEY_get_digest(const GOST_KEY *key)
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{
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return key->digest_nid;
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}
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int
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GOST_KEY_set_digest(GOST_KEY *key, int digest_nid)
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{
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if (digest_nid == NID_id_GostR3411_94_CryptoProParamSet ||
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digest_nid == NID_id_tc26_gost3411_2012_256 ||
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digest_nid == NID_id_tc26_gost3411_2012_512) {
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key->digest_nid = digest_nid;
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return 1;
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}
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return 0;
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}
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size_t
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GOST_KEY_get_size(const GOST_KEY *r)
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{
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int i;
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BIGNUM *order = NULL;
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const EC_GROUP *group;
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if (r == NULL)
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return 0;
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group = GOST_KEY_get0_group(r);
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if (group == NULL)
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return 0;
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if ((order = BN_new()) == NULL)
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return 0;
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if (EC_GROUP_get_order(group, order, NULL) == 0) {
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BN_clear_free(order);
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return 0;
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}
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i = BN_num_bytes(order);
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BN_clear_free(order);
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return (i);
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}
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#endif
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