-/* crypto/ec/ec2_smpl.c */
+/*
+ * Copyright 2002-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
*
* Douglas Stebila of Sun Microsystems Laboratories.
*
*/
-/* ====================================================================
- * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
#include <openssl/err.h>
#ifndef OPENSSL_NO_EC2M
-const EC_METHOD *EC_GF2m_simple_method(void)
-{
- static const EC_METHOD ret = {
- EC_FLAGS_DEFAULT_OCT,
- NID_X9_62_characteristic_two_field,
- ec_GF2m_simple_group_init,
- ec_GF2m_simple_group_finish,
- ec_GF2m_simple_group_clear_finish,
- ec_GF2m_simple_group_copy,
- ec_GF2m_simple_group_set_curve,
- ec_GF2m_simple_group_get_curve,
- ec_GF2m_simple_group_get_degree,
- ec_GF2m_simple_group_check_discriminant,
- ec_GF2m_simple_point_init,
- ec_GF2m_simple_point_finish,
- ec_GF2m_simple_point_clear_finish,
- ec_GF2m_simple_point_copy,
- ec_GF2m_simple_point_set_to_infinity,
- 0 /* set_Jprojective_coordinates_GFp */ ,
- 0 /* get_Jprojective_coordinates_GFp */ ,
- ec_GF2m_simple_point_set_affine_coordinates,
- ec_GF2m_simple_point_get_affine_coordinates,
- 0, 0, 0,
- ec_GF2m_simple_add,
- ec_GF2m_simple_dbl,
- ec_GF2m_simple_invert,
- ec_GF2m_simple_is_at_infinity,
- ec_GF2m_simple_is_on_curve,
- ec_GF2m_simple_cmp,
- ec_GF2m_simple_make_affine,
- ec_GF2m_simple_points_make_affine,
-
- /*
- * the following three method functions are defined in ec2_mult.c
- */
- ec_GF2m_simple_mul,
- ec_GF2m_precompute_mult,
- ec_GF2m_have_precompute_mult,
-
- ec_GF2m_simple_field_mul,
- ec_GF2m_simple_field_sqr,
- ec_GF2m_simple_field_div,
- 0 /* field_encode */ ,
- 0 /* field_decode */ ,
- 0 /* field_set_to_one */
- };
-
- return &ret;
-}
-
/*
* Initialize a GF(2^m)-based EC_GROUP structure. Note that all other members
* are handled by EC_GROUP_new.
group->a = BN_new();
group->b = BN_new();
- if (!group->field || !group->a || !group->b) {
+ if (group->field == NULL || group->a == NULL || group->b == NULL) {
BN_free(group->field);
BN_free(group->a);
BN_free(group->b);
point->Y = BN_new();
point->Z = BN_new();
- if (!point->X || !point->Y || !point->Z) {
+ if (point->X == NULL || point->Y == NULL || point->Z == NULL) {
BN_free(point->X);
BN_free(point->Y);
BN_free(point->Z);
if (!BN_copy(dest->Z, src->Z))
return 0;
dest->Z_is_one = src->Z_is_one;
+ dest->curve_name = src->curve_name;
return 1;
}
goto err;
if (!BN_one(point->Z))
goto err;
+ point->Z_is_one = 1;
ret = 1;
return BN_GF2m_mod_div(r, a, b, group->field, ctx);
}
+/*-
+ * Computes the multiplicative inverse of a in GF(2^m), storing the result in r.
+ * If a is zero (or equivalent), you'll get a EC_R_CANNOT_INVERT error.
+ * SCA hardening is with blinding: BN_GF2m_mod_inv does that.
+ */
+static int ec_GF2m_simple_field_inv(const EC_GROUP *group, BIGNUM *r,
+ const BIGNUM *a, BN_CTX *ctx)
+{
+ int ret;
+
+ if (!(ret = BN_GF2m_mod_inv(r, a, group->field, ctx)))
+ ECerr(EC_F_EC_GF2M_SIMPLE_FIELD_INV, EC_R_CANNOT_INVERT);
+ return ret;
+}
+
+const EC_METHOD *EC_GF2m_simple_method(void)
+{
+ static const EC_METHOD ret = {
+ EC_FLAGS_DEFAULT_OCT,
+ NID_X9_62_characteristic_two_field,
+ ec_GF2m_simple_group_init,
+ ec_GF2m_simple_group_finish,
+ ec_GF2m_simple_group_clear_finish,
+ ec_GF2m_simple_group_copy,
+ ec_GF2m_simple_group_set_curve,
+ ec_GF2m_simple_group_get_curve,
+ ec_GF2m_simple_group_get_degree,
+ ec_group_simple_order_bits,
+ ec_GF2m_simple_group_check_discriminant,
+ ec_GF2m_simple_point_init,
+ ec_GF2m_simple_point_finish,
+ ec_GF2m_simple_point_clear_finish,
+ ec_GF2m_simple_point_copy,
+ ec_GF2m_simple_point_set_to_infinity,
+ 0 /* set_Jprojective_coordinates_GFp */ ,
+ 0 /* get_Jprojective_coordinates_GFp */ ,
+ ec_GF2m_simple_point_set_affine_coordinates,
+ ec_GF2m_simple_point_get_affine_coordinates,
+ 0, 0, 0,
+ ec_GF2m_simple_add,
+ ec_GF2m_simple_dbl,
+ ec_GF2m_simple_invert,
+ ec_GF2m_simple_is_at_infinity,
+ ec_GF2m_simple_is_on_curve,
+ ec_GF2m_simple_cmp,
+ ec_GF2m_simple_make_affine,
+ ec_GF2m_simple_points_make_affine,
+
+ /*
+ * the following three method functions are defined in ec2_mult.c
+ */
+ ec_GF2m_simple_mul,
+ ec_GF2m_precompute_mult,
+ ec_GF2m_have_precompute_mult,
+
+ ec_GF2m_simple_field_mul,
+ ec_GF2m_simple_field_sqr,
+ ec_GF2m_simple_field_div,
+ ec_GF2m_simple_field_inv,
+ 0 /* field_encode */ ,
+ 0 /* field_decode */ ,
+ 0, /* field_set_to_one */
+ ec_key_simple_priv2oct,
+ ec_key_simple_oct2priv,
+ 0, /* set private */
+ ec_key_simple_generate_key,
+ ec_key_simple_check_key,
+ ec_key_simple_generate_public_key,
+ 0, /* keycopy */
+ 0, /* keyfinish */
+ ecdh_simple_compute_key,
+ 0 /* blind_coordinates */
+ };
+
+ return &ret;
+}
+
#endif
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