+++ /dev/null
-/* crypto/ec/ecp_mont.c */
-/* ====================================================================
- * Copyright (c) 1998-2001 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>
-
-#include "ec_lcl.h"
-
-
-const EC_METHOD *EC_GFp_mont_method(void)
- {
- static const EC_METHOD ret = {
- ec_GFp_mont_group_init,
- ec_GFp_mont_group_finish,
- ec_GFp_mont_group_clear_finish,
- ec_GFp_mont_group_copy,
- ec_GFp_mont_group_set_curve_GFp,
- ec_GFp_simple_group_get_curve_GFp,
- ec_GFp_simple_group_set_generator,
- ec_GFp_simple_group_get0_generator,
- ec_GFp_simple_group_get_order,
- ec_GFp_simple_group_get_cofactor,
- ec_GFp_simple_point_init,
- ec_GFp_simple_point_finish,
- ec_GFp_simple_point_clear_finish,
- ec_GFp_simple_point_copy,
- ec_GFp_simple_point_set_to_infinity,
- ec_GFp_simple_set_Jprojective_coordinates_GFp,
- ec_GFp_simple_get_Jprojective_coordinates_GFp,
- ec_GFp_simple_point_set_affine_coordinates_GFp,
- ec_GFp_simple_point_get_affine_coordinates_GFp,
- ec_GFp_simple_set_compressed_coordinates_GFp,
- ec_GFp_simple_point2oct,
- ec_GFp_simple_oct2point,
- ec_GFp_simple_add,
- ec_GFp_simple_dbl,
- ec_GFp_simple_invert,
- ec_GFp_simple_is_at_infinity,
- ec_GFp_simple_is_on_curve,
- ec_GFp_simple_cmp,
- ec_GFp_simple_make_affine,
- ec_GFp_simple_points_make_affine,
- ec_GFp_mont_field_mul,
- ec_GFp_mont_field_sqr,
- ec_GFp_mont_field_encode,
- ec_GFp_mont_field_decode,
- ec_GFp_mont_field_set_to_one };
-
- return &ret;
- }
-
-
-int ec_GFp_mont_group_init(EC_GROUP *group)
- {
- int ok;
-
- ok = ec_GFp_simple_group_init(group);
- group->field_data1 = NULL;
- group->field_data2 = NULL;
- return ok;
- }
-
-
-int ec_GFp_mont_group_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
- {
- BN_CTX *new_ctx = NULL;
- BN_MONT_CTX *mont = NULL;
- BIGNUM *one = NULL;
- int ret = 0;
-
- if (group->field_data1 != NULL)
- {
- BN_MONT_CTX_free(group->field_data1);
- group->field_data1 = NULL;
- }
- if (group->field_data2 != NULL)
- {
- BN_free(group->field_data2);
- group->field_data2 = NULL;
- }
-
- if (ctx == NULL)
- {
- ctx = new_ctx = BN_CTX_new();
- if (ctx == NULL)
- return 0;
- }
-
- mont = BN_MONT_CTX_new();
- if (mont == NULL) goto err;
- if (!BN_MONT_CTX_set(mont, p, ctx))
- {
- ECerr(EC_F_GFP_MONT_GROUP_SET_CURVE_GFP, ERR_R_BN_LIB);
- goto err;
- }
- one = BN_new();
- if (one == NULL) goto err;
- if (!BN_to_montgomery(one, BN_value_one(), mont, ctx)) goto err;
-
- group->field_data1 = mont;
- mont = NULL;
- group->field_data2 = one;
- one = NULL;
-
- ret = ec_GFp_simple_group_set_curve_GFp(group, p, a, b, ctx);
-
- if (!ret)
- {
- BN_MONT_CTX_free(group->field_data1);
- group->field_data1 = NULL;
- BN_free(group->field_data2);
- group->field_data2 = NULL;
- }
-
- err:
- if (new_ctx != NULL)
- BN_CTX_free(new_ctx);
- if (mont != NULL)
- BN_MONT_CTX_free(mont);
- return ret;
- }
-
-
-void ec_GFp_mont_group_finish(EC_GROUP *group)
- {
- if (group->field_data1 != NULL)
- {
- BN_MONT_CTX_free(group->field_data1);
- group->field_data1 = NULL;
- }
- if (group->field_data2 != NULL)
- {
- BN_free(group->field_data2);
- group->field_data2 = NULL;
- }
- ec_GFp_simple_group_finish(group);
- }
-
-
-void ec_GFp_mont_group_clear_finish(EC_GROUP *group)
- {
- if (group->field_data1 != NULL)
- {
- BN_MONT_CTX_free(group->field_data1);
- group->field_data1 = NULL;
- }
- if (group->field_data2 != NULL)
- {
- BN_clear_free(group->field_data2);
- group->field_data2 = NULL;
- }
- ec_GFp_simple_group_clear_finish(group);
- }
-
-
-int ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src)
- {
- if (dest->field_data1 != NULL)
- {
- BN_MONT_CTX_free(dest->field_data1);
- dest->field_data1 = NULL;
- }
- if (dest->field_data2 != NULL)
- {
- BN_clear_free(dest->field_data2);
- dest->field_data2 = NULL;
- }
-
- if (!ec_GFp_simple_group_copy(dest, src)) return 0;
-
- if (src->field_data1 != NULL)
- {
- dest->field_data1 = BN_MONT_CTX_new();
- if (dest->field_data1 == NULL) return 0;
- if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1)) goto err;
- }
- if (src->field_data2 != NULL)
- {
- dest->field_data2 = BN_dup(src->field_data2);
- if (dest->field_data2 == NULL) goto err;
- }
-
- return 1;
-
- err:
- if (dest->field_data1 != NULL)
- {
- BN_MONT_CTX_free(dest->field_data1);
- dest->field_data1 = NULL;
- }
- return 0;
- }
-
-
-int ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT_FIELD_MUL, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- return BN_mod_mul_montgomery(r, a, b, group->field_data1, ctx);
- }
-
-
-int ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT_FIELD_SQR, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- return BN_mod_mul_montgomery(r, a, a, group->field_data1, ctx);
- }
-
-
-int ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT_FIELD_ENCODE, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- return BN_to_montgomery(r, a, (BN_MONT_CTX *)group->field_data1, ctx);
- }
-
-
-int ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
- {
- if (group->field_data1 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT_FIELD_DECODE, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- return BN_from_montgomery(r, a, group->field_data1, ctx);
- }
-
-
-int ec_GFp_mont_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx)
- {
- if (group->field_data2 == NULL)
- {
- ECerr(EC_F_EC_GFP_MONT_FIELD_DECODE, EC_R_NOT_INITIALIZED);
- return 0;
- }
-
- if (!BN_copy(r, group->field_data2)) return 0;
- return 1;
- }
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