Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/modes/ofb128.c	Lines:	20	20	100.0 %
Date:	2017-11-07	Branches:	10	10	100.0 %


/* $OpenBSD: ofb128.c,v 1.4 2015/02/10 09:46:30 miod Exp $ */
/* ====================================================================
 * Copyright (c) 2008 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.
 * ====================================================================
 *
 */

#include <openssl/crypto.h>
#include "modes_lcl.h"
#include <string.h>

#ifndef MODES_DEBUG
# ifndef NDEBUG
#  define NDEBUG
# endif
#endif

/* The input and output encrypted as though 128bit ofb mode is being
 * used.  The extra state information to record how much of the
 * 128bit block we have used is contained in *num;
 */
void CRYPTO_ofb128_encrypt(const unsigned char *in, unsigned char *out,
			size_t len, const void *key,
			unsigned char ivec[16], int *num,
			block128_f block)
{
	unsigned int n;
	size_t l=0;

	n = *num;

#if !defined(OPENSSL_SMALL_FOOTPRINT)
	if (16%sizeof(size_t) == 0) do { /* always true actually */
		while (n && len) {
			*(out++) = *(in++) ^ ivec[n];
			--len;
			n = (n+1) % 16;
		}
#ifdef __STRICT_ALIGNMENT
		if (((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0)
			break;
#endif
		while (len>=16) {
			(*block)(ivec, ivec, key);
			for (; n<16; n+=sizeof(size_t))
				*(size_t*)(out+n) =
				*(size_t*)(in+n) ^ *(size_t*)(ivec+n);
			len -= 16;
			out += 16;
			in  += 16;
			n = 0;
		}
		if (len) {
			(*block)(ivec, ivec, key);
			while (len--) {
				out[n] = in[n] ^ ivec[n];
				++n;
			}
		}
		*num = n;
		return;
	} while(0);
	/* the rest would be commonly eliminated by x86* compiler */
#endif
	while (l<len) {
		if (n==0) {
			(*block)(ivec, ivec, key);
		}
		out[l] = in[l] ^ ivec[n];
		++l;
		n = (n+1) % 16;
	}

	*num=n;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ofb128.c,v 1.4 2015/02/10 09:46:30 miod Exp $ */
2			/* ====================================================================
3			* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
4			*
5			* Redistribution and use in source and binary forms, with or without
6			* modification, are permitted provided that the following conditions
7			* are met:
8			*
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			*
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in
14			* the documentation and/or other materials provided with the
15			* distribution.
16			*
17			* 3. All advertising materials mentioning features or use of this
18			* software must display the following acknowledgment:
19			* "This product includes software developed by the OpenSSL Project
20			* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21			*
22			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23			* endorse or promote products derived from this software without
24			* prior written permission. For written permission, please contact
25			* openssl-core@openssl.org.
26			*
27			* 5. Products derived from this software may not be called "OpenSSL"
28			* nor may "OpenSSL" appear in their names without prior written
29			* permission of the OpenSSL Project.
30			*
31			* 6. Redistributions of any form whatsoever must retain the following
32			* acknowledgment:
33			* "This product includes software developed by the OpenSSL Project
34			* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35			*
36			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47			* OF THE POSSIBILITY OF SUCH DAMAGE.
48			* ====================================================================
49			*
50			*/
51
52			#include <openssl/crypto.h>
53			#include "modes_lcl.h"
54			#include <string.h>
55
56			#ifndef MODES_DEBUG
57			# ifndef NDEBUG
58			# define NDEBUG
59			# endif
60			#endif
61
62			/* The input and output encrypted as though 128bit ofb mode is being
63			* used. The extra state information to record how much of the
64			* 128bit block we have used is contained in *num;
65			*/
66			void CRYPTO_ofb128_encrypt(const unsigned char in, unsigned char out,
67			size_t len, const void *key,
68			unsigned char ivec[16], int *num,
69			block128_f block)
70			{
71			unsigned int n;
72			size_t l=0;
73
74		912	n = *num;
75
76			#if !defined(OPENSSL_SMALL_FOOTPRINT)
77			if (16%sizeof(size_t) == 0) do { /* always true actually */
78	✓✓	4008	while (n && len) {
79		1548	(out++) = (in++) ^ ivec[n];
80		1548	--len;
81		1548	n = (n+1) % 16;
82			}
83			#ifdef __STRICT_ALIGNMENT
84			if (((size_t)in\|(size_t)out\|(size_t)ivec)%sizeof(size_t) != 0)
85			break;
86			#endif
87	✓✓	3288	while (len>=16) {
88		1416	(*block)(ivec, ivec, key);
89	✓✓	8496	for (; n<16; n+=sizeof(size_t))
90		2832	(size_t)(out+n) =
91		2832	(size_t)(in+n) ^ (size_t)(ivec+n);
92		1416	len -= 16;
93		1416	out += 16;
94		1416	in += 16;
95			n = 0;
96			}
97	✓✓	456	if (len) {
98		168	(*block)(ivec, ivec, key);
99	✓✓	2184	while (len--) {
100		924	out[n] = in[n] ^ ivec[n];
101		924	++n;
102			}
103			}
104		456	*num = n;
105			return;
106			} while(0);
107			/* the rest would be commonly eliminated by x86* compiler */
108			#endif
109			while (l<len) {
110			if (n==0) {
111			(*block)(ivec, ivec, key);
112			}
113			out[l] = in[l] ^ ivec[n];
114			++l;
115			n = (n+1) % 16;
116			}
117
118			*num=n;
119		456	}