26a3a48d65
like Malloc, Realloc and especially Free conflict with already existing names on some operating systems or other packages. That is reason enough to change the names of the OpenSSL memory allocation macros to something that has a better chance of being unique, like prepending them with OPENSSL_. This change includes all the name changes needed throughout all C files.
144 lines
4.3 KiB
C
144 lines
4.3 KiB
C
/* crypto/bn/bn_ctx.c */
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/* Written by Ulf Moeller for the OpenSSL project. */
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/* ====================================================================
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* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#ifndef BN_CTX_DEBUG
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# undef NDEBUG /* avoid conflicting definitions */
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# define NDEBUG
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#endif
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#include <stdio.h>
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#include <assert.h>
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#include "cryptlib.h"
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#include <openssl/bn.h>
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BN_CTX *BN_CTX_new(void)
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{
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BN_CTX *ret;
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ret=(BN_CTX *)OPENSSL_malloc(sizeof(BN_CTX));
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if (ret == NULL)
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{
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BNerr(BN_F_BN_CTX_NEW,ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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BN_CTX_init(ret);
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ret->flags=BN_FLG_MALLOCED;
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return(ret);
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}
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void BN_CTX_init(BN_CTX *ctx)
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{
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int i;
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ctx->tos = 0;
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ctx->flags = 0;
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ctx->depth = 0;
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ctx->too_many = 0;
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for (i = 0; i < BN_CTX_NUM; i++)
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BN_init(&(ctx->bn[i]));
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}
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void BN_CTX_free(BN_CTX *ctx)
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{
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int i;
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if (ctx == NULL) return;
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assert(ctx->depth == 0);
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for (i=0; i < BN_CTX_NUM; i++)
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BN_clear_free(&(ctx->bn[i]));
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if (ctx->flags & BN_FLG_MALLOCED)
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OPENSSL_free(ctx);
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}
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void BN_CTX_start(BN_CTX *ctx)
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{
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if (ctx->depth < BN_CTX_NUM_POS)
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ctx->pos[ctx->depth] = ctx->tos;
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ctx->depth++;
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}
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BIGNUM *BN_CTX_get(BN_CTX *ctx)
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{
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if (ctx->depth > BN_CTX_NUM_POS || ctx->tos >= BN_CTX_NUM)
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{
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if (!ctx->too_many)
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{
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BNerr(BN_F_BN_CTX_GET,BN_R_TOO_MANY_TEMPORARY_VARIABLES);
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/* disable error code until BN_CTX_end is called: */
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ctx->too_many = 1;
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}
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return NULL;
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}
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return (&(ctx->bn[ctx->tos++]));
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}
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void BN_CTX_end(BN_CTX *ctx)
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{
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if (ctx == NULL) return;
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assert(ctx->depth > 0);
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if (ctx->depth == 0)
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/* should never happen, but we can tolerate it if not in
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* debug mode (could be a 'goto err' in the calling function
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* before BN_CTX_start was reached) */
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BN_CTX_start(ctx);
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ctx->too_many = 0;
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ctx->depth--;
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if (ctx->depth < BN_CTX_NUM_POS)
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ctx->tos = ctx->pos[ctx->depth];
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}
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