X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fec%2Fecp_mont.c;h=d3d770d2a3373af316ea623e054f6d4e1d5ac12e;hp=873d142af2eafad77a400e5addf127db2ab0803b;hb=fb82cbfe3da846d61e1d4c6d14bf7f4111cccbb2;hpb=bb62a8b0c57c88ec189389f07250dee9c87d0681 diff --git a/crypto/ec/ecp_mont.c b/crypto/ec/ecp_mont.c index 873d142af2..d3d770d2a3 100644 --- a/crypto/ec/ecp_mont.c +++ b/crypto/ec/ecp_mont.c @@ -1,139 +1,242 @@ -/* 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). +/* + * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved. + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved * + * Licensed under the Apache License 2.0 (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 */ -#include "ec_lcl.h" +#include +#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_mont_field_mul, - ec_GFp_mont_field_sqr, - ec_GFp_mont_field_encode, - ec_GFp_mont_field_decode }; - - return &ret; - } - +{ + static const EC_METHOD ret = { + EC_FLAGS_DEFAULT_OCT, + NID_X9_62_prime_field, + 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, + ec_GFp_simple_group_get_curve, + ec_GFp_simple_group_get_degree, + ec_group_simple_order_bits, + ec_GFp_simple_group_check_discriminant, + 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, + ec_GFp_simple_point_get_affine_coordinates, + 0, 0, 0, + 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, + 0 /* mul */ , + 0 /* precompute_mult */ , + 0 /* have_precompute_mult */ , + ec_GFp_mont_field_mul, + ec_GFp_mont_field_sqr, + 0 /* field_div */ , + ec_GFp_mont_field_encode, + ec_GFp_mont_field_decode, + ec_GFp_mont_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, /* field_inverse_mod_ord */ + ec_GFp_simple_blind_coordinates, + ec_GFp_simple_ladder_pre, + ec_GFp_simple_ladder_step, + ec_GFp_simple_ladder_post + }; + + return &ret; +} int ec_GFp_mont_group_init(EC_GROUP *group) - { - int ok; - - ok = ec_GFp_simple_group_init(group); - group->field_data = 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); -/* TODO */ - - -void ec_GFp_mont_group_finish(EC_GROUP *group); -/* TODO */ - - -void ec_GFp_mont_group_clear_finish(EC_GROUP *group); -/* TODO */ - - -int ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src); -/* TODO */ - - -int ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx); -/* TODO */ - - -int ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx); -/* TODO */ - - -int ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx); -/* TODO */ - - -int ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx); -/* TODO */ +{ + int ok; + + ok = ec_GFp_simple_group_init(group); + group->field_data1 = NULL; + group->field_data2 = NULL; + return ok; +} + +void ec_GFp_mont_group_finish(EC_GROUP *group) +{ + BN_MONT_CTX_free(group->field_data1); + group->field_data1 = 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) +{ + BN_MONT_CTX_free(group->field_data1); + group->field_data1 = 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) +{ + BN_MONT_CTX_free(dest->field_data1); + dest->field_data1 = 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: + BN_MONT_CTX_free(dest->field_data1); + dest->field_data1 = NULL; + return 0; +} + +int ec_GFp_mont_group_set_curve(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; + + BN_MONT_CTX_free(group->field_data1); + group->field_data1 = 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_EC_GFP_MONT_GROUP_SET_CURVE, 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(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: + BN_free(one); + BN_CTX_free(new_ctx); + BN_MONT_CTX_free(mont); + return ret; +} + +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_SET_TO_ONE, EC_R_NOT_INITIALIZED); + return 0; + } + + if (!BN_copy(r, group->field_data2)) + return 0; + return 1; +}