Head

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 %


/* $OpenBSD: buffer.c,v 1.27 2017/05/02 03:59:44 deraadt 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 <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/buffer.h>
#include <openssl/err.h>

/*
 * LIMIT_BEFORE_EXPANSION is the maximum n such that (n + 3) / 3 * 4 < 2**31.
 * That function is applied in several functions in this file and this limit
 * ensures that the result fits in an int.
 */
#define LIMIT_BEFORE_EXPANSION 0x5ffffffc

BUF_MEM *
BUF_MEM_new(void)
{
	BUF_MEM *ret;

	if ((ret = calloc(1, sizeof(BUF_MEM))) == NULL) {
		BUFerror(ERR_R_MALLOC_FAILURE);
		return (NULL);
	}

	return (ret);
}

void
BUF_MEM_free(BUF_MEM *a)
{
	if (a == NULL)
		return;

	freezero(a->data, a->max);
	free(a);
}

int
BUF_MEM_grow(BUF_MEM *str, size_t len)
{
	return BUF_MEM_grow_clean(str, len);
}

int
BUF_MEM_grow_clean(BUF_MEM *str, size_t len)
{
	char *ret;
	size_t n;

	if (str->max >= len) {
		if (str->length >= len)
			memset(&str->data[len], 0, str->length - len);
		str->length = len;
		return (len);
	}

	if (len > LIMIT_BEFORE_EXPANSION) {
		BUFerror(ERR_R_MALLOC_FAILURE);
		return 0;
	}

	n = (len + 3) / 3 * 4;
	if ((ret = recallocarray(str->data, str->max, n, 1)) == NULL) {
		BUFerror(ERR_R_MALLOC_FAILURE);
		return (0);
	}
	str->data = ret;
	str->max = n;
	str->length = len;

	return (len);
}

void
BUF_reverse(unsigned char *out, const unsigned char *in, size_t size)
{
	size_t i;

	if (in) {
		out += size - 1;
		for (i = 0; i < size; i++)
			*out-- = *in++;
	} else {
		unsigned char *q;
		char c;
		q = out + size - 1;
		for (i = 0; i < size / 2; i++) {
			c = *q;
			*q-- = *out;
			*out++ = c;
		}
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: buffer.c,v 1.27 2017/05/02 03:59:44 deraadt Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <stdio.h>
60			#include <stdlib.h>
61			#include <string.h>
62
63			#include <openssl/buffer.h>
64			#include <openssl/err.h>
65
66			/*
67			* LIMIT_BEFORE_EXPANSION is the maximum n such that (n + 3) / 3 * 4 < 2**31.
68			* That function is applied in several functions in this file and this limit
69			* ensures that the result fits in an int.
70			*/
71			#define LIMIT_BEFORE_EXPANSION 0x5ffffffc
72
73			BUF_MEM *
74			BUF_MEM_new(void)
75			{
76			BUF_MEM *ret;
77
78	✗✓	312396	if ((ret = calloc(1, sizeof(BUF_MEM))) == NULL) {
79			BUFerror(ERR_R_MALLOC_FAILURE);
80			return (NULL);
81			}
82
83		156198	return (ret);
84		156198	}
85
86			void
87			BUF_MEM_free(BUF_MEM *a)
88			{
89	✓✓	218842	if (a == NULL)
90			return;
91
92		90019	freezero(a->data, a->max);
93		90019	free(a);
94		199440	}
95
96			int
97			BUF_MEM_grow(BUF_MEM *str, size_t len)
98			{
99		903360	return BUF_MEM_grow_clean(str, len);
100			}
101
102			int
103			BUF_MEM_grow_clean(BUF_MEM *str, size_t len)
104			{
105			char *ret;
106			size_t n;
107
108	✓✓	1181562	if (str->max >= len) {
109	✓✓	412551	if (str->length >= len)
110		110104	memset(&str->data[len], 0, str->length - len);
111		412551	str->length = len;
112		412551	return (len);
113			}
114
115	✗✓	178230	if (len > LIMIT_BEFORE_EXPANSION) {
116			BUFerror(ERR_R_MALLOC_FAILURE);
117			return 0;
118			}
119
120		178230	n = (len + 3) / 3 * 4;
121	✗✓	178230	if ((ret = recallocarray(str->data, str->max, n, 1)) == NULL) {
122			BUFerror(ERR_R_MALLOC_FAILURE);
123			return (0);
124			}
125		178230	str->data = ret;
126		178230	str->max = n;
127		178230	str->length = len;
128
129		178230	return (len);
130		590781	}
131
132			void
133			BUF_reverse(unsigned char out, const unsigned char in, size_t size)
134			{
135			size_t i;
136
137			if (in) {
138			out += size - 1;
139			for (i = 0; i < size; i++)
140			out-- = in++;
141			} else {
142			unsigned char *q;
143			char c;
144			q = out + size - 1;
145			for (i = 0; i < size / 2; i++) {
146			c = *q;
147			q-- = out;
148			*out++ = c;
149			}
150			}
151			}