diff options
Diffstat (limited to 'crypto/bn/bn_sqr.c')
| -rw-r--r-- | crypto/bn/bn_sqr.c | 96 |
1 files changed, 22 insertions, 74 deletions
diff --git a/crypto/bn/bn_sqr.c b/crypto/bn/bn_sqr.c index 256d26e8dbec..0c0a590f0c6a 100644 --- a/crypto/bn/bn_sqr.c +++ b/crypto/bn/bn_sqr.c @@ -1,63 +1,13 @@ -/* crypto/bn/bn_sqr.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. +/* + * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. * - * 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.] + * 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 <stdio.h> -#include "cryptlib.h" +#include "internal/cryptlib.h" #include "bn_lcl.h" /* r must not be a */ @@ -66,13 +16,20 @@ */ int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) { + int ret = bn_sqr_fixed_top(r, a, ctx); + + bn_correct_top(r); + bn_check_top(r); + + return ret; +} + +int bn_sqr_fixed_top(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) +{ int max, al; int ret = 0; BIGNUM *tmp, *rr; -#ifdef BN_COUNT - fprintf(stderr, "BN_sqr %d * %d\n", a->top, a->top); -#endif bn_check_top(a); al = a->top; @@ -85,7 +42,7 @@ int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) BN_CTX_start(ctx); rr = (a != r) ? r : BN_CTX_get(ctx); tmp = BN_CTX_get(ctx); - if (!rr || !tmp) + if (rr == NULL || tmp == NULL) goto err; max = 2 * al; /* Non-zero (from above) */ @@ -135,14 +92,8 @@ int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) } rr->neg = 0; - /* - * If the most-significant half of the top word of 'a' is zero, then the - * square of 'a' will max-1 words. - */ - if (a->d[al - 1] == (a->d[al - 1] & BN_MASK2l)) - rr->top = max - 1; - else - rr->top = max; + rr->top = max; + rr->flags |= BN_FLG_FIXED_TOP; if (r != rr && BN_copy(r, rr) == NULL) goto err; @@ -151,7 +102,7 @@ int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) bn_check_top(rr); bn_check_top(tmp); BN_CTX_end(ctx); - return (ret); + return ret; } /* tmp must have 2*n words */ @@ -208,9 +159,6 @@ void bn_sqr_recursive(BN_ULONG *r, const BN_ULONG *a, int n2, BN_ULONG *t) int zero, c1; BN_ULONG ln, lo, *p; -# ifdef BN_COUNT - fprintf(stderr, " bn_sqr_recursive %d * %d\n", n2, n2); -# endif if (n2 == 4) { # ifndef BN_SQR_COMBA bn_sqr_normal(r, a, 4, t); @@ -246,7 +194,7 @@ void bn_sqr_recursive(BN_ULONG *r, const BN_ULONG *a, int n2, BN_ULONG *t) if (!zero) bn_sqr_recursive(&(t[n2]), t, n, p); else - memset(&(t[n2]), 0, n2 * sizeof(BN_ULONG)); + memset(&t[n2], 0, sizeof(*t) * n2); bn_sqr_recursive(r, a, n, p); bn_sqr_recursive(&(r[n2]), &(a[n]), n, p); |