Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/modes/cbc128.c	Lines:	25	57	43.9 %
Date:	2017-11-07	Branches:	11	36	30.6 %


/* $OpenBSD: cbc128.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

#undef STRICT_ALIGNMENT
#ifdef __STRICT_ALIGNMENT
#define STRICT_ALIGNMENT 1
#else
#define STRICT_ALIGNMENT 0
#endif

void CRYPTO_cbc128_encrypt(const unsigned char *in, unsigned char *out,
			size_t len, const void *key,
			unsigned char ivec[16], block128_f block)
{
	size_t n;
	const unsigned char *iv = ivec;

#if !defined(OPENSSL_SMALL_FOOTPRINT)
	if (STRICT_ALIGNMENT &&
	    ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
		while (len>=16) {
			for(n=0; n<16; ++n)
				out[n] = in[n] ^ iv[n];
			(*block)(out, out, key);
			iv = out;
			len -= 16;
			in  += 16;
			out += 16;
		}
	} else {
		while (len>=16) {
			for(n=0; n<16; n+=sizeof(size_t))
				*(size_t*)(out+n) =
				*(size_t*)(in+n) ^ *(size_t*)(iv+n);
			(*block)(out, out, key);
			iv = out;
			len -= 16;
			in  += 16;
			out += 16;
		}
	}
#endif
	while (len) {
		for(n=0; n<16 && n<len; ++n)
			out[n] = in[n] ^ iv[n];
		for(; n<16; ++n)
			out[n] = iv[n];
		(*block)(out, out, key);
		iv = out;
		if (len<=16) break;
		len -= 16;
		in  += 16;
		out += 16;
	}
	memcpy(ivec,iv,16);
}

void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out,
			size_t len, const void *key,
			unsigned char ivec[16], block128_f block)
{
	size_t n;
	union { size_t t[16/sizeof(size_t)]; unsigned char c[16]; } tmp;

#if !defined(OPENSSL_SMALL_FOOTPRINT)
	if (in != out) {
		const unsigned char *iv = ivec;

		if (STRICT_ALIGNMENT &&
		    ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
			while (len>=16) {
				(*block)(in, out, key);
				for(n=0; n<16; ++n)
					out[n] ^= iv[n];
				iv = in;
				len -= 16;
				in  += 16;
				out += 16;
			}
		} else if (16%sizeof(size_t) == 0) { /* always true */
			while (len>=16) {
				size_t *out_t=(size_t *)out, *iv_t=(size_t *)iv;

				(*block)(in, out, key);
				for(n=0; n<16/sizeof(size_t); n++)
					out_t[n] ^= iv_t[n];
				iv = in;
				len -= 16;
				in  += 16;
				out += 16;
			}
		}
		memcpy(ivec,iv,16);
	} else {
		if (STRICT_ALIGNMENT &&
		    ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
			unsigned char c;
			while (len>=16) {
				(*block)(in, tmp.c, key);
				for(n=0; n<16; ++n) {
					c = in[n];
					out[n] = tmp.c[n] ^ ivec[n];
					ivec[n] = c;
				}
				len -= 16;
				in  += 16;
				out += 16;
			}
		} else if (16%sizeof(size_t) == 0) { /* always true */
			while (len>=16) {
				size_t c, *out_t=(size_t *)out, *ivec_t=(size_t *)ivec;
				const size_t *in_t=(const size_t *)in;

				(*block)(in, tmp.c, key);
				for(n=0; n<16/sizeof(size_t); n++) {
					c = in_t[n];
					out_t[n] = tmp.t[n] ^ ivec_t[n];
					ivec_t[n] = c;
				}
				len -= 16;
				in  += 16;
				out += 16;
			}
		}
	}
#endif
	while (len) {
		unsigned char c;
		(*block)(in, tmp.c, key);
		for(n=0; n<16 && n<len; ++n) {
			c = in[n];
			out[n] = tmp.c[n] ^ ivec[n];
			ivec[n] = c;
		}
		if (len<=16) {
			for (; n<16; ++n)
				ivec[n] = in[n];
			break;
		}
		len -= 16;
		in  += 16;
		out += 16;
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cbc128.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			#undef STRICT_ALIGNMENT
63			#ifdef __STRICT_ALIGNMENT
64			#define STRICT_ALIGNMENT 1
65			#else
66			#define STRICT_ALIGNMENT 0
67			#endif
68
69			void CRYPTO_cbc128_encrypt(const unsigned char in, unsigned char out,
70			size_t len, const void *key,
71			unsigned char ivec[16], block128_f block)
72			{
73			size_t n;
74			const unsigned char *iv = ivec;
75
76			#if !defined(OPENSSL_SMALL_FOOTPRINT)
77			if (STRICT_ALIGNMENT &&
78			((size_t)in\|(size_t)out\|(size_t)ivec)%sizeof(size_t) != 0) {
79			while (len>=16) {
80			for(n=0; n<16; ++n)
81			out[n] = in[n] ^ iv[n];
82			(*block)(out, out, key);
83			iv = out;
84			len -= 16;
85			in += 16;
86			out += 16;
87			}
88			} else {
89	✓✓	492	while (len>=16) {
90	✓✓	828	for(n=0; n<16; n+=sizeof(size_t))
91		276	(size_t)(out+n) =
92		276	(size_t)(in+n) ^ (size_t)(iv+n);
93		138	(*block)(out, out, key);
94			iv = out;
95		138	len -= 16;
96		138	in += 16;
97		138	out += 16;
98			}
99			}
100			#endif
101	✗✓	72	while (len) {
102			for(n=0; n<16 && n<len; ++n)
103			out[n] = in[n] ^ iv[n];
104			for(; n<16; ++n)
105			out[n] = iv[n];
106			(*block)(out, out, key);
107			iv = out;
108			if (len<=16) break;
109			len -= 16;
110			in += 16;
111			out += 16;
112			}
113		72	memcpy(ivec,iv,16);
114		72	}
115
116			void CRYPTO_cbc128_decrypt(const unsigned char in, unsigned char out,
117			size_t len, const void *key,
118			unsigned char ivec[16], block128_f block)
119			{
120			size_t n;
121		84	union { size_t t[16/sizeof(size_t)]; unsigned char c[16]; } tmp;
122
123			#if !defined(OPENSSL_SMALL_FOOTPRINT)
124	✓✗	42	if (in != out) {
125			const unsigned char *iv = ivec;
126
127			if (STRICT_ALIGNMENT &&
128			((size_t)in\|(size_t)out\|(size_t)ivec)%sizeof(size_t) != 0) {
129			while (len>=16) {
130			(*block)(in, out, key);
131			for(n=0; n<16; ++n)
132			out[n] ^= iv[n];
133			iv = in;
134			len -= 16;
135			in += 16;
136			out += 16;
137			}
138			} else if (16%sizeof(size_t) == 0) { /* always true */
139	✓✓	252	while (len>=16) {
140		84	size_t out_t=(size_t )out, iv_t=(size_t )iv;
141
142		84	(*block)(in, out, key);
143	✓✓	504	for(n=0; n<16/sizeof(size_t); n++)
144		168	out_t[n] ^= iv_t[n];
145			iv = in;
146		84	len -= 16;
147		84	in += 16;
148		84	out += 16;
149			}
150			}
151		42	memcpy(ivec,iv,16);
152		42	} else {
153			if (STRICT_ALIGNMENT &&
154			((size_t)in\|(size_t)out\|(size_t)ivec)%sizeof(size_t) != 0) {
155			unsigned char c;
156			while (len>=16) {
157			(*block)(in, tmp.c, key);
158			for(n=0; n<16; ++n) {
159			c = in[n];
160			out[n] = tmp.c[n] ^ ivec[n];
161			ivec[n] = c;
162			}
163			len -= 16;
164			in += 16;
165			out += 16;
166			}
167			} else if (16%sizeof(size_t) == 0) { /* always true */
168			while (len>=16) {
169			size_t c, out_t=(size_t )out, ivec_t=(size_t )ivec;
170			const size_t in_t=(const size_t )in;
171
172			(*block)(in, tmp.c, key);
173			for(n=0; n<16/sizeof(size_t); n++) {
174			c = in_t[n];
175			out_t[n] = tmp.t[n] ^ ivec_t[n];
176			ivec_t[n] = c;
177			}
178			len -= 16;
179			in += 16;
180			out += 16;
181			}
182			}
183			}
184			#endif
185	✗✓✗✗	42	while (len) {
186			unsigned char c;
187			(*block)(in, tmp.c, key);
188			for(n=0; n<16 && n<len; ++n) {
189			c = in[n];
190			out[n] = tmp.c[n] ^ ivec[n];
191			ivec[n] = c;
192			}
193			if (len<=16) {
194			for (; n<16; ++n)
195			ivec[n] = in[n];
196			break;
197			}
198			len -= 16;
199			in += 16;
200			out += 16;
201			}
202		42	}