GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/buffer/buffer.c Lines: 21 36 58.3 %
Date: 2017-11-13 Branches: 9 18 50.0 %

Line Branch Exec Source
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/* $OpenBSD: buffer.c,v 1.27 2017/05/02 03:59:44 deraadt Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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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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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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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 the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.]
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/buffer.h>
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#include <openssl/err.h>
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/*
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 * LIMIT_BEFORE_EXPANSION is the maximum n such that (n + 3) / 3 * 4 < 2**31.
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 * That function is applied in several functions in this file and this limit
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 * ensures that the result fits in an int.
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 */
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#define LIMIT_BEFORE_EXPANSION 0x5ffffffc
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BUF_MEM *
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BUF_MEM_new(void)
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{
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	BUF_MEM *ret;
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	if ((ret = calloc(1, sizeof(BUF_MEM))) == NULL) {
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		BUFerror(ERR_R_MALLOC_FAILURE);
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		return (NULL);
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	}
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	return (ret);
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}
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void
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BUF_MEM_free(BUF_MEM *a)
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{
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218842
	if (a == NULL)
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		return;
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	freezero(a->data, a->max);
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	free(a);
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}
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int
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BUF_MEM_grow(BUF_MEM *str, size_t len)
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{
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	return BUF_MEM_grow_clean(str, len);
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}
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int
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BUF_MEM_grow_clean(BUF_MEM *str, size_t len)
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{
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	char *ret;
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	size_t n;
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	if (str->max >= len) {
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		if (str->length >= len)
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			memset(&str->data[len], 0, str->length - len);
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		str->length = len;
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		return (len);
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	}
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	if (len > LIMIT_BEFORE_EXPANSION) {
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		BUFerror(ERR_R_MALLOC_FAILURE);
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		return 0;
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	}
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	n = (len + 3) / 3 * 4;
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	if ((ret = recallocarray(str->data, str->max, n, 1)) == NULL) {
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		BUFerror(ERR_R_MALLOC_FAILURE);
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		return (0);
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	}
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	str->data = ret;
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	str->max = n;
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	str->length = len;
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	return (len);
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590781
}
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void
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BUF_reverse(unsigned char *out, const unsigned char *in, size_t size)
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{
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	size_t i;
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	if (in) {
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		out += size - 1;
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		for (i = 0; i < size; i++)
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			*out-- = *in++;
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	} else {
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		unsigned char *q;
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		char c;
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		q = out + size - 1;
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		for (i = 0; i < size / 2; i++) {
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			c = *q;
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			*q-- = *out;
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			*out++ = c;
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		}
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	}
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}