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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/des/ede_cbcm_enc.c	Lines:	73	73	100.0 %
Date:	2017-11-07	Branches:	22	28	78.6 %


/* $OpenBSD: ede_cbcm_enc.c,v 1.6 2014/10/28 07:35:58 jsg Exp $ */
/* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL
 * project 13 Feb 1999.
 */
/* ====================================================================
 * Copyright (c) 1999 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
 *    licensing@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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

/*

This is an implementation of Triple DES Cipher Block Chaining with Output
Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).

Note that there is a known attack on this by Biham and Knudsen but it takes
a lot of work:

http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz

*/

#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */

#ifndef OPENSSL_NO_DESCBCM
#include "des_locl.h"

void DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out,
	     long length, DES_key_schedule *ks1, DES_key_schedule *ks2,
	     DES_key_schedule *ks3, DES_cblock *ivec1, DES_cblock *ivec2,
	     int enc)
    {
    DES_LONG tin0,tin1;
    DES_LONG tout0,tout1,xor0,xor1,m0,m1;
    long l=length;
    DES_LONG tin[2];
    unsigned char *iv1,*iv2;

    iv1 = &(*ivec1)[0];
    iv2 = &(*ivec2)[0];

    if (enc)
	{
	c2l(iv1,m0);
	c2l(iv1,m1);
	c2l(iv2,tout0);
	c2l(iv2,tout1);
	for (l-=8; l>=-7; l-=8)
	    {
	    tin[0]=m0;
	    tin[1]=m1;
	    DES_encrypt1(tin,ks3,1);
	    m0=tin[0];
	    m1=tin[1];

	    if(l < 0)
		{
		c2ln(in,tin0,tin1,l+8);
		}
	    else
		{
		c2l(in,tin0);
		c2l(in,tin1);
		}
	    tin0^=tout0;
	    tin1^=tout1;

	    tin[0]=tin0;
	    tin[1]=tin1;
	    DES_encrypt1(tin,ks1,1);
	    tin[0]^=m0;
	    tin[1]^=m1;
	    DES_encrypt1(tin,ks2,0);
	    tin[0]^=m0;
	    tin[1]^=m1;
	    DES_encrypt1(tin,ks1,1);
	    tout0=tin[0];
	    tout1=tin[1];

	    l2c(tout0,out);
	    l2c(tout1,out);
	    }
	iv1=&(*ivec1)[0];
	l2c(m0,iv1);
	l2c(m1,iv1);

	iv2=&(*ivec2)[0];
	l2c(tout0,iv2);
	l2c(tout1,iv2);
	}
    else
	{
	DES_LONG t0,t1;

	c2l(iv1,m0);
	c2l(iv1,m1);
	c2l(iv2,xor0);
	c2l(iv2,xor1);
	for (l-=8; l>=-7; l-=8)
	    {
	    tin[0]=m0;
	    tin[1]=m1;
	    DES_encrypt1(tin,ks3,1);
	    m0=tin[0];
	    m1=tin[1];

	    c2l(in,tin0);
	    c2l(in,tin1);

	    t0=tin0;
	    t1=tin1;

	    tin[0]=tin0;
	    tin[1]=tin1;
	    DES_encrypt1(tin,ks1,0);
	    tin[0]^=m0;
	    tin[1]^=m1;
	    DES_encrypt1(tin,ks2,1);
	    tin[0]^=m0;
	    tin[1]^=m1;
	    DES_encrypt1(tin,ks1,0);
	    tout0=tin[0];
	    tout1=tin[1];

	    tout0^=xor0;
	    tout1^=xor1;
	    if(l < 0)
		{
		l2cn(tout0,tout1,out,l+8);
		}
	    else
		{
		l2c(tout0,out);
		l2c(tout1,out);
		}
	    xor0=t0;
	    xor1=t1;
	    }

	iv1=&(*ivec1)[0];
	l2c(m0,iv1);
	l2c(m1,iv1);

	iv2=&(*ivec2)[0];
	l2c(xor0,iv2);
	l2c(xor1,iv2);
	}
    tin0=tin1=tout0=tout1=xor0=xor1=0;
    tin[0]=tin[1]=0;
    }
#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ede_cbcm_enc.c,v 1.6 2014/10/28 07:35:58 jsg Exp $ */
2			/* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL
3			* project 13 Feb 1999.
4			*/
5			/* ====================================================================
6			* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			/*
60
61			This is an implementation of Triple DES Cipher Block Chaining with Output
62			Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).
63
64			Note that there is a known attack on this by Biham and Knudsen but it takes
65			a lot of work:
66
67			http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz
68
69			*/
70
71			#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */
72
73			#ifndef OPENSSL_NO_DESCBCM
74			#include "des_locl.h"
75
76			void DES_ede3_cbcm_encrypt(const unsigned char in, unsigned char out,
77			long length, DES_key_schedule ks1, DES_key_schedule ks2,
78			DES_key_schedule ks3, DES_cblock ivec1, DES_cblock *ivec2,
79			int enc)
80			{
81			DES_LONG tin0,tin1;
82			DES_LONG tout0,tout1,xor0,xor1,m0,m1;
83			long l=length;
84		36	DES_LONG tin[2];
85			unsigned char iv1,iv2;
86
87		18	iv1 = &(*ivec1)[0];
88		18	iv2 = &(*ivec2)[0];
89
90	✓✓	18	if (enc)
91			{
92		12	c2l(iv1,m0);
93		12	c2l(iv1,m1);
94		12	c2l(iv2,tout0);
95		12	c2l(iv2,tout1);
96	✓✓	72	for (l-=8; l>=-7; l-=8)
97			{
98		24	tin[0]=m0;
99		24	tin[1]=m1;
100		24	DES_encrypt1(tin,ks3,1);
101		24	m0=tin[0];
102		24	m1=tin[1];
103
104	✓✓	24	if(l < 0)
105			{
106	✗✗✗✓ ✓✓✓✓ ✓	66	c2ln(in,tin0,tin1,l+8);
107			}
108			else
109			{
110		18	c2l(in,tin0);
111		18	c2l(in,tin1);
112			}
113		24	tin0^=tout0;
114		24	tin1^=tout1;
115
116		24	tin[0]=tin0;
117		24	tin[1]=tin1;
118		24	DES_encrypt1(tin,ks1,1);
119		24	tin[0]^=m0;
120		24	tin[1]^=m1;
121		24	DES_encrypt1(tin,ks2,0);
122		24	tin[0]^=m0;
123		24	tin[1]^=m1;
124		24	DES_encrypt1(tin,ks1,1);
125		24	tout0=tin[0];
126		24	tout1=tin[1];
127
128		24	l2c(tout0,out);
129		24	l2c(tout1,out);
130			}
131			iv1=&(*ivec1)[0];
132		12	l2c(m0,iv1);
133		12	l2c(m1,iv1);
134
135			iv2=&(*ivec2)[0];
136		12	l2c(tout0,iv2);
137		12	l2c(tout1,iv2);
138		12	}
139			else
140			{
141			DES_LONG t0,t1;
142
143		6	c2l(iv1,m0);
144		6	c2l(iv1,m1);
145		6	c2l(iv2,xor0);
146		6	c2l(iv2,xor1);
147	✓✓	60	for (l-=8; l>=-7; l-=8)
148			{
149		24	tin[0]=m0;
150		24	tin[1]=m1;
151		24	DES_encrypt1(tin,ks3,1);
152		24	m0=tin[0];
153		24	m1=tin[1];
154
155		24	c2l(in,tin0);
156		24	c2l(in,tin1);
157
158			t0=tin0;
159			t1=tin1;
160
161		24	tin[0]=tin0;
162		24	tin[1]=tin1;
163		24	DES_encrypt1(tin,ks1,0);
164		24	tin[0]^=m0;
165		24	tin[1]^=m1;
166		24	DES_encrypt1(tin,ks2,1);
167		24	tin[0]^=m0;
168		24	tin[1]^=m1;
169		24	DES_encrypt1(tin,ks1,0);
170		24	tout0=tin[0];
171		24	tout1=tin[1];
172
173		24	tout0^=xor0;
174		24	tout1^=xor1;
175	✓✓	24	if(l < 0)
176			{
177	✗✗✗✓ ✓✓✓✓ ✓	66	l2cn(tout0,tout1,out,l+8);
178			}
179			else
180			{
181		18	l2c(tout0,out);
182		18	l2c(tout1,out);
183			}
184			xor0=t0;
185			xor1=t1;
186			}
187
188			iv1=&(*ivec1)[0];
189		6	l2c(m0,iv1);
190		6	l2c(m1,iv1);
191
192			iv2=&(*ivec2)[0];
193		6	l2c(xor0,iv2);
194		6	l2c(xor1,iv2);
195			}
196			tin0=tin1=tout0=tout1=xor0=xor1=0;
197		18	tin[0]=tin[1]=0;
198		18	}
199			#endif