Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/des/pcbc_enc.c	Lines:	35	35	100.0 %
Date:	2017-11-07	Branches:	22	28	78.6 %


/* $OpenBSD: pcbc_enc.c,v 1.6 2014/10/28 07:35:58 jsg 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 "des_locl.h"

void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output,
		      long length, DES_key_schedule *schedule,
		      DES_cblock *ivec, int enc)
	{
	DES_LONG sin0,sin1,xor0,xor1,tout0,tout1;
	DES_LONG tin[2];
	const unsigned char *in;
	unsigned char *out,*iv;

	in=input;
	out=output;
	iv = &(*ivec)[0];

	if (enc)
		{
		c2l(iv,xor0);
		c2l(iv,xor1);
		for (; length>0; length-=8)
			{
			if (length >= 8)
				{
				c2l(in,sin0);
				c2l(in,sin1);
				}
			else
				c2ln(in,sin0,sin1,length);
			tin[0]=sin0^xor0;
			tin[1]=sin1^xor1;
			DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT);
			tout0=tin[0];
			tout1=tin[1];
			xor0=sin0^tout0;
			xor1=sin1^tout1;
			l2c(tout0,out);
			l2c(tout1,out);
			}
		}
	else
		{
		c2l(iv,xor0); c2l(iv,xor1);
		for (; length>0; length-=8)
			{
			c2l(in,sin0);
			c2l(in,sin1);
			tin[0]=sin0;
			tin[1]=sin1;
			DES_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT);
			tout0=tin[0]^xor0;
			tout1=tin[1]^xor1;
			if (length >= 8)
				{
				l2c(tout0,out);
				l2c(tout1,out);
				}
			else
				l2cn(tout0,tout1,out,length);
			xor0=tout0^sin0;
			xor1=tout1^sin1;
			}
		}
	tin[0]=tin[1]=0;
	sin0=sin1=xor0=xor1=tout0=tout1=0;
	}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: pcbc_enc.c,v 1.6 2014/10/28 07:35:58 jsg 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 "des_locl.h"
60
61			void DES_pcbc_encrypt(const unsigned char input, unsigned char output,
62			long length, DES_key_schedule *schedule,
63			DES_cblock *ivec, int enc)
64			{
65			DES_LONG sin0,sin1,xor0,xor1,tout0,tout1;
66		24	DES_LONG tin[2];
67			const unsigned char *in;
68			unsigned char out,iv;
69
70			in=input;
71			out=output;
72		12	iv = &(*ivec)[0];
73
74	✓✓	12	if (enc)
75			{
76			c2l(iv,xor0);
77			c2l(iv,xor1);
78	✓✓	54	for (; length>0; length-=8)
79			{
80	✓✓	24	if (length >= 8)
81			{
82		18	c2l(in,sin0);
83		18	c2l(in,sin1);
84		18	}
85			else
86	✗✗✗✓ ✓✓✓✓ ✓	66	c2ln(in,sin0,sin1,length);
87		24	tin[0]=sin0^xor0;
88		24	tin[1]=sin1^xor1;
89		24	DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT);
90		24	tout0=tin[0];
91		24	tout1=tin[1];
92		24	xor0=sin0^tout0;
93		24	xor1=sin1^tout1;
94		24	l2c(tout0,out);
95		24	l2c(tout1,out);
96			}
97			}
98			else
99			{
100			c2l(iv,xor0); c2l(iv,xor1);
101	✓✓	54	for (; length>0; length-=8)
102			{
103		24	c2l(in,sin0);
104		24	c2l(in,sin1);
105		24	tin[0]=sin0;
106		24	tin[1]=sin1;
107		24	DES_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT);
108		24	tout0=tin[0]^xor0;
109		24	tout1=tin[1]^xor1;
110	✓✓	24	if (length >= 8)
111			{
112		18	l2c(tout0,out);
113		18	l2c(tout1,out);
114		18	}
115			else
116	✗✗✗✓ ✓✓✓✓ ✓	66	l2cn(tout0,tout1,out,length);
117		24	xor0=tout0^sin0;
118		24	xor1=tout1^sin1;
119			}
120			}
121		12	tin[0]=tin[1]=0;
122			sin0=sin1=xor0=xor1=tout0=tout1=0;
123		12	}