-/* crypto/ec/ec_lib.c */
/*
- * Originally written by Bodo Moeller for the OpenSSL project.
- */
-/* ====================================================================
- * Copyright (c) 1998-2003 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).
+ * Copyright 2001-2016 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.
* Binary polynomial ECC support in OpenSSL originally developed by
}
ret->meth = meth;
- ret->order = BN_new();
- if (ret->order == NULL)
- goto err;
- ret->cofactor = BN_new();
- if (ret->cofactor == NULL)
- goto err;
+ if ((ret->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) {
+ ret->order = BN_new();
+ if (ret->order == NULL)
+ goto err;
+ ret->cofactor = BN_new();
+ if (ret->cofactor == NULL)
+ goto err;
+ }
ret->asn1_flag = OPENSSL_EC_NAMED_CURVE;
ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
if (!meth->group_init(ret))
dest->generator = NULL;
}
- if (!BN_copy(dest->order, src->order))
- return 0;
- if (!BN_copy(dest->cofactor, src->cofactor))
- return 0;
+ if ((src->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0) {
+ if (!BN_copy(dest->order, src->order))
+ return 0;
+ if (!BN_copy(dest->cofactor, src->cofactor))
+ return 0;
+ }
dest->curve_name = src->curve_name;
dest->asn1_flag = src->asn1_flag;
BN_zero(group->cofactor);
/*
- * We ignore the return value because some groups have an order with
+ * Some groups have an order with
* factors of two, which makes the Montgomery setup fail.
* |group->mont_data| will be NULL in this case.
*/
- ec_precompute_mont_data(group);
+ if (BN_is_odd(group->order)) {
+ return ec_precompute_mont_data(group);
+ }
+ BN_MONT_CTX_free(group->mont_data);
+ group->mont_data = NULL;
return 1;
}
int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
{
+ if (group->order == NULL)
+ return 0;
if (!BN_copy(order, group->order))
return 0;
return !BN_is_zero(order);
}
+const BIGNUM *EC_GROUP_get0_order(const EC_GROUP *group)
+{
+ return group->order;
+}
+
+int EC_GROUP_order_bits(const EC_GROUP *group)
+{
+ OPENSSL_assert(group->meth->group_order_bits != NULL);
+ return group->meth->group_order_bits(group);
+}
+
int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor,
BN_CTX *ctx)
{
+
+ if (group->cofactor == NULL)
+ return 0;
if (!BN_copy(cofactor, group->cofactor))
return 0;
return !BN_is_zero(group->cofactor);
}
+const BIGNUM *EC_GROUP_get0_cofactor(const EC_GROUP *group)
+{
+ return group->cofactor;
+}
+
void EC_GROUP_set_curve_name(EC_GROUP *group, int nid)
{
group->curve_name = nid;
if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) &&
EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b))
return 1;
+ if (a->meth->flags & EC_FLAGS_CUSTOM_CURVE)
+ return 0;
if (ctx == NULL)
ctx_new = ctx = BN_CTX_new();
r = 1;
if (!r) {
+ const BIGNUM *ao, *bo, *ac, *bc;
/* compare the order and cofactor */
- if (!EC_GROUP_get_order(a, a1, ctx) ||
- !EC_GROUP_get_order(b, b1, ctx) ||
- !EC_GROUP_get_cofactor(a, a2, ctx) ||
- !EC_GROUP_get_cofactor(b, b2, ctx)) {
+ ao = EC_GROUP_get0_order(a);
+ bo = EC_GROUP_get0_order(b);
+ ac = EC_GROUP_get0_cofactor(a);
+ bc = EC_GROUP_get0_cofactor(b);
+ if (ao == NULL || bo == NULL) {
BN_CTX_end(ctx);
BN_CTX_free(ctx_new);
return -1;
}
- if (BN_cmp(a1, b1) || BN_cmp(a2, b2))
+ if (BN_cmp(ao, bo) || BN_cmp(ac, bc))
r = 1;
}
return NULL;
}
- ret = OPENSSL_malloc(sizeof(*ret));
+ ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
+ if (!group->meth->point_set_affine_coordinates(group, point, x, y, ctx))
+ return 0;
+
+ if (EC_POINT_is_on_curve(group, point, ctx) <= 0) {
+ ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP,
+ EC_R_POINT_IS_NOT_ON_CURVE);
+ return 0;
+ }
+ return 1;
}
#ifndef OPENSSL_NO_EC2M
EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
+ if (!group->meth->point_set_affine_coordinates(group, point, x, y, ctx))
+ return 0;
+
+ if (EC_POINT_is_on_curve(group, point, ctx) <= 0) {
+ ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M,
+ EC_R_POINT_IS_NOT_ON_CURVE);
+ return 0;
+ }
+ return 1;
}
#endif
{
return CRYPTO_get_ex_data(&key->ex_data, idx);
}
+
+int ec_group_simple_order_bits(const EC_GROUP *group)
+{
+ if (group->order == NULL)
+ return 0;
+ return BN_num_bits(group->order);
+}