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Diffstat (limited to 'Cryptlib/OpenSSL/crypto/bn/bn_gcd.c')
-rw-r--r--Cryptlib/OpenSSL/crypto/bn/bn_gcd.c172
1 files changed, 127 insertions, 45 deletions
diff --git a/Cryptlib/OpenSSL/crypto/bn/bn_gcd.c b/Cryptlib/OpenSSL/crypto/bn/bn_gcd.c
index e1aac131..ce59fe70 100644
--- a/Cryptlib/OpenSSL/crypto/bn/bn_gcd.c
+++ b/Cryptlib/OpenSSL/crypto/bn/bn_gcd.c
@@ -1,13 +1,115 @@
-/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+/* crypto/bn/bn_gcd.c */
+/* 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.]
+ */
+/* ====================================================================
+ * 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).
*
- * 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 "internal/cryptlib.h"
+#include "cryptlib.h"
#include "bn_lcl.h"
static BIGNUM *euclid(BIGNUM *a, BIGNUM *b);
@@ -124,25 +226,10 @@ static BIGNUM *BN_mod_inverse_no_branch(BIGNUM *in,
BIGNUM *BN_mod_inverse(BIGNUM *in,
const BIGNUM *a, const BIGNUM *n, BN_CTX *ctx)
{
- BIGNUM *rv;
- int noinv;
- rv = int_bn_mod_inverse(in, a, n, ctx, &noinv);
- if (noinv)
- BNerr(BN_F_BN_MOD_INVERSE, BN_R_NO_INVERSE);
- return rv;
-}
-
-BIGNUM *int_bn_mod_inverse(BIGNUM *in,
- const BIGNUM *a, const BIGNUM *n, BN_CTX *ctx,
- int *pnoinv)
-{
BIGNUM *A, *B, *X, *Y, *M, *D, *T, *R = NULL;
BIGNUM *ret = NULL;
int sign;
- if (pnoinv)
- *pnoinv = 0;
-
if ((BN_get_flags(a, BN_FLG_CONSTTIME) != 0)
|| (BN_get_flags(n, BN_FLG_CONSTTIME) != 0)) {
return BN_mod_inverse_no_branch(in, a, n, ctx);
@@ -189,11 +276,11 @@ BIGNUM *int_bn_mod_inverse(BIGNUM *in,
* sign*Y*a == A (mod |n|).
*/
- if (BN_is_odd(n) && (BN_num_bits(n) <= 2048)) {
+ if (BN_is_odd(n) && (BN_num_bits(n) <= (BN_BITS <= 32 ? 450 : 2048))) {
/*
* Binary inversion algorithm; requires odd modulus. This is faster
* than the general algorithm if the modulus is sufficiently small
- * (about 400 .. 500 bits on 32-bit systems, but much more on 64-bit
+ * (about 400 .. 500 bits on 32-bit sytems, but much more on 64-bit
* systems)
*/
int shift;
@@ -370,7 +457,7 @@ BIGNUM *int_bn_mod_inverse(BIGNUM *in,
* i.e.
* sign*(Y + D*X)*a == B (mod |n|).
*
- * So if we set (X, Y, sign) := (Y + D*X, X, -sign), we arrive back at
+ * So if we set (X, Y, sign) := (Y + D*X, X, -sign), we arrive back at
* -sign*X*a == B (mod |n|),
* sign*Y*a == A (mod |n|).
* Note that X and Y stay non-negative all the time.
@@ -435,8 +522,7 @@ BIGNUM *int_bn_mod_inverse(BIGNUM *in,
goto err;
}
} else {
- if (pnoinv)
- *pnoinv = 1;
+ BNerr(BN_F_BN_MOD_INVERSE, BN_R_NO_INVERSE);
goto err;
}
ret = R;
@@ -457,6 +543,8 @@ static BIGNUM *BN_mod_inverse_no_branch(BIGNUM *in,
BN_CTX *ctx)
{
BIGNUM *A, *B, *X, *Y, *M, *D, *T, *R = NULL;
+ BIGNUM local_A, local_B;
+ BIGNUM *pA, *pB;
BIGNUM *ret = NULL;
int sign;
@@ -494,14 +582,11 @@ static BIGNUM *BN_mod_inverse_no_branch(BIGNUM *in,
* Turn BN_FLG_CONSTTIME flag on, so that when BN_div is invoked,
* BN_div_no_branch will be called eventually.
*/
- {
- BIGNUM local_B;
- bn_init(&local_B);
- BN_with_flags(&local_B, B, BN_FLG_CONSTTIME);
- if (!BN_nnmod(B, &local_B, A, ctx))
- goto err;
- /* Ensure local_B goes out of scope before any further use of B */
- }
+ pB = &local_B;
+ local_B.flags = 0;
+ BN_with_flags(pB, B, BN_FLG_CONSTTIME);
+ if (!BN_nnmod(B, pB, A, ctx))
+ goto err;
}
sign = -1;
/*-
@@ -525,16 +610,13 @@ static BIGNUM *BN_mod_inverse_no_branch(BIGNUM *in,
* Turn BN_FLG_CONSTTIME flag on, so that when BN_div is invoked,
* BN_div_no_branch will be called eventually.
*/
- {
- BIGNUM local_A;
- bn_init(&local_A);
- BN_with_flags(&local_A, A, BN_FLG_CONSTTIME);
+ pA = &local_A;
+ local_A.flags = 0;
+ BN_with_flags(pA, A, BN_FLG_CONSTTIME);
- /* (D, M) := (A/B, A%B) ... */
- if (!BN_div(D, M, &local_A, B, ctx))
- goto err;
- /* Ensure local_A goes out of scope before any further use of A */
- }
+ /* (D, M) := (A/B, A%B) ... */
+ if (!BN_div(D, M, pA, B, ctx))
+ goto err;
/*-
* Now
@@ -565,7 +647,7 @@ static BIGNUM *BN_mod_inverse_no_branch(BIGNUM *in,
* i.e.
* sign*(Y + D*X)*a == B (mod |n|).
*
- * So if we set (X, Y, sign) := (Y + D*X, X, -sign), we arrive back at
+ * So if we set (X, Y, sign) := (Y + D*X, X, -sign), we arrive back at
* -sign*X*a == B (mod |n|),
* sign*Y*a == A (mod |n|).
* Note that X and Y stay non-negative all the time.
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-30 09:31:47 +0000