From eb8dd9dca1228af0cd132f515509051ecfabf6f6 Mon Sep 17 00:00:00 2001 From: cvs2svn Date: Mon, 14 Apr 2025 17:32:06 +0000 Subject: This commit was manufactured by cvs2git to create tag 'tb_20250414'. --- src/lib/libcrypto/dh/dh_check.c | 237 ---------------------------------------- 1 file changed, 237 deletions(-) delete mode 100644 src/lib/libcrypto/dh/dh_check.c (limited to 'src/lib/libcrypto/dh/dh_check.c') diff --git a/src/lib/libcrypto/dh/dh_check.c b/src/lib/libcrypto/dh/dh_check.c deleted file mode 100644 index a880f9fca1..0000000000 --- a/src/lib/libcrypto/dh/dh_check.c +++ /dev/null @@ -1,237 +0,0 @@ -/* $OpenBSD: dh_check.c,v 1.30 2024/11/29 15:59:57 tb Exp $ */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * 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 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 acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS 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 AUTHOR OR 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. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ - -#include - -#include -#include -#include - -#include "bn_local.h" -#include "dh_local.h" - -#define DH_NUMBER_ITERATIONS_FOR_PRIME 64 - -/* - * Check that p is odd and 1 < g < p - 1. - */ - -static int -DH_check_params(const DH *dh, int *flags) -{ - BIGNUM *max_g = NULL; - int ok = 0; - - *flags = 0; - - if (!BN_is_odd(dh->p)) - *flags |= DH_CHECK_P_NOT_PRIME; - - /* - * Check that 1 < dh->g < p - 1 - */ - - if (BN_cmp(dh->g, BN_value_one()) <= 0) - *flags |= DH_NOT_SUITABLE_GENERATOR; - /* max_g = p - 1 */ - if ((max_g = BN_dup(dh->p)) == NULL) - goto err; - if (!BN_sub_word(max_g, 1)) - goto err; - /* check that g < max_g */ - if (BN_cmp(dh->g, max_g) >= 0) - *flags |= DH_NOT_SUITABLE_GENERATOR; - - ok = 1; - - err: - BN_free(max_g); - - return ok; -} - -/* - * Check that p is a safe prime and that g is a suitable generator. - */ - -int -DH_check(const DH *dh, int *flags) -{ - BN_CTX *ctx = NULL; - int is_prime; - int ok = 0; - - *flags = 0; - - if (!DH_check_params(dh, flags)) - goto err; - - ctx = BN_CTX_new(); - if (ctx == NULL) - goto err; - BN_CTX_start(ctx); - - if (dh->q != NULL) { - BIGNUM *residue; - - if ((residue = BN_CTX_get(ctx)) == NULL) - goto err; - if ((*flags & DH_NOT_SUITABLE_GENERATOR) == 0) { - /* Check g^q == 1 mod p */ - if (!BN_mod_exp_ct(residue, dh->g, dh->q, dh->p, ctx)) - goto err; - if (!BN_is_one(residue)) - *flags |= DH_NOT_SUITABLE_GENERATOR; - } - is_prime = BN_is_prime_ex(dh->q, DH_NUMBER_ITERATIONS_FOR_PRIME, - ctx, NULL); - if (is_prime < 0) - goto err; - if (is_prime == 0) - *flags |= DH_CHECK_Q_NOT_PRIME; - /* Check p == 1 mod q, i.e., q divides p - 1 */ - if (!BN_div_ct(NULL, residue, dh->p, dh->q, ctx)) - goto err; - if (!BN_is_one(residue)) - *flags |= DH_CHECK_INVALID_Q_VALUE; - } - - is_prime = BN_is_prime_ex(dh->p, DH_NUMBER_ITERATIONS_FOR_PRIME, - ctx, NULL); - if (is_prime < 0) - goto err; - if (is_prime == 0) - *flags |= DH_CHECK_P_NOT_PRIME; - else if (dh->q == NULL) { - BIGNUM *q; - - if ((q = BN_CTX_get(ctx)) == NULL) - goto err; - if (!BN_rshift1(q, dh->p)) - goto err; - is_prime = BN_is_prime_ex(q, DH_NUMBER_ITERATIONS_FOR_PRIME, - ctx, NULL); - if (is_prime < 0) - goto err; - if (is_prime == 0) - *flags |= DH_CHECK_P_NOT_SAFE_PRIME; - } - - ok = 1; - - err: - BN_CTX_end(ctx); - BN_CTX_free(ctx); - return ok; -} -LCRYPTO_ALIAS(DH_check); - -int -DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *flags) -{ - BN_CTX *ctx = NULL; - BIGNUM *max_pub_key; - int ok = 0; - - *flags = 0; - - if ((ctx = BN_CTX_new()) == NULL) - goto err; - BN_CTX_start(ctx); - if ((max_pub_key = BN_CTX_get(ctx)) == NULL) - goto err; - - /* - * Check that 1 < pub_key < dh->p - 1 - */ - - if (BN_cmp(pub_key, BN_value_one()) <= 0) - *flags |= DH_CHECK_PUBKEY_TOO_SMALL; - - /* max_pub_key = dh->p - 1 */ - if (!BN_sub(max_pub_key, dh->p, BN_value_one())) - goto err; - - if (BN_cmp(pub_key, max_pub_key) >= 0) - *flags |= DH_CHECK_PUBKEY_TOO_LARGE; - - /* - * If dh->q is set, check that pub_key^q == 1 mod p - */ - - if (dh->q != NULL) { - BIGNUM *residue; - - if ((residue = BN_CTX_get(ctx)) == NULL) - goto err; - - if (!BN_mod_exp_ct(residue, pub_key, dh->q, dh->p, ctx)) - goto err; - if (!BN_is_one(residue)) - *flags |= DH_CHECK_PUBKEY_INVALID; - } - - ok = 1; - - err: - BN_CTX_end(ctx); - BN_CTX_free(ctx); - - return ok; -} -LCRYPTO_ALIAS(DH_check_pub_key); -- cgit v1.2.3-55-g6feb