X-Git-Url: https://code.wpia.club/?a=blobdiff_plain;f=lib%2Fopenssl%2Fcrypto%2Fec%2Fec_check.c;h=eeb06ec1cbe306db63e903b279341a6fc1855396;hb=02ed66432c92de70694700164f986190aad3cbc5;hp=0e316b4b3ff075234fcd62791d2995442710be01;hpb=89016837dcbf2775cd15dc8cbaba00dc6379f86e;p=cassiopeia.git diff --git a/lib/openssl/crypto/ec/ec_check.c b/lib/openssl/crypto/ec/ec_check.c index 0e316b4..eeb06ec 100644 --- a/lib/openssl/crypto/ec/ec_check.c +++ b/lib/openssl/crypto/ec/ec_check.c @@ -1,123 +1,72 @@ -/* crypto/ec/ec_check.c */ -/* ==================================================================== - * Copyright (c) 1998-2002 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 2002-2016 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 */ #include "ec_lcl.h" #include int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx) - { - int ret = 0; - BIGNUM *order; - BN_CTX *new_ctx = NULL; - EC_POINT *point = NULL; +{ + int ret = 0; + const BIGNUM *order; + BN_CTX *new_ctx = NULL; + EC_POINT *point = NULL; + + /* Custom curves assumed to be correct */ + if ((group->meth->flags & EC_FLAGS_CUSTOM_CURVE) != 0) + return 1; + + if (ctx == NULL) { + ctx = new_ctx = BN_CTX_new(); + if (ctx == NULL) { + ECerr(EC_F_EC_GROUP_CHECK, ERR_R_MALLOC_FAILURE); + goto err; + } + } - if (ctx == NULL) - { - ctx = new_ctx = BN_CTX_new(); - if (ctx == NULL) - { - ECerr(EC_F_EC_GROUP_CHECK, ERR_R_MALLOC_FAILURE); - goto err; - } - } - BN_CTX_start(ctx); - if ((order = BN_CTX_get(ctx)) == NULL) goto err; + /* check the discriminant */ + if (!EC_GROUP_check_discriminant(group, ctx)) { + ECerr(EC_F_EC_GROUP_CHECK, EC_R_DISCRIMINANT_IS_ZERO); + goto err; + } - /* check the discriminant */ - if (!EC_GROUP_check_discriminant(group, ctx)) - { - ECerr(EC_F_EC_GROUP_CHECK, EC_R_DISCRIMINANT_IS_ZERO); - goto err; - } + /* check the generator */ + if (group->generator == NULL) { + ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_GENERATOR); + goto err; + } + if (EC_POINT_is_on_curve(group, group->generator, ctx) <= 0) { + ECerr(EC_F_EC_GROUP_CHECK, EC_R_POINT_IS_NOT_ON_CURVE); + goto err; + } - /* check the generator */ - if (group->generator == NULL) - { - ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_GENERATOR); - goto err; - } - if (!EC_POINT_is_on_curve(group, group->generator, ctx)) - { - ECerr(EC_F_EC_GROUP_CHECK, EC_R_POINT_IS_NOT_ON_CURVE); - goto err; - } + /* check the order of the generator */ + if ((point = EC_POINT_new(group)) == NULL) + goto err; + order = EC_GROUP_get0_order(group); + if (order == NULL) + goto err; + if (BN_is_zero(order)) { + ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_ORDER); + goto err; + } - /* check the order of the generator */ - if ((point = EC_POINT_new(group)) == NULL) goto err; - if (!EC_GROUP_get_order(group, order, ctx)) goto err; - if (BN_is_zero(order)) - { - ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_ORDER); - goto err; - } - - if (!EC_POINT_mul(group, point, order, NULL, NULL, ctx)) goto err; - if (!EC_POINT_is_at_infinity(group, point)) - { - ECerr(EC_F_EC_GROUP_CHECK, EC_R_INVALID_GROUP_ORDER); - goto err; - } + if (!EC_POINT_mul(group, point, order, NULL, NULL, ctx)) + goto err; + if (!EC_POINT_is_at_infinity(group, point)) { + ECerr(EC_F_EC_GROUP_CHECK, EC_R_INVALID_GROUP_ORDER); + goto err; + } - ret = 1; + ret = 1; -err: - if (ctx != NULL) - BN_CTX_end(ctx); - if (new_ctx != NULL) - BN_CTX_free(new_ctx); - if (point) - EC_POINT_free(point); - return ret; - } + err: + BN_CTX_free(new_ctx); + EC_POINT_free(point); + return ret; +}