Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/des/qud_cksm.c	Lines:	21	21	100.0 %
Date:	2017-11-07	Branches:	8	12	66.7 %


/* $OpenBSD: qud_cksm.c,v 1.7 2014/06/12 15:49:28 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.]
 */

/* From "Message Authentication"  R.R. Jueneman, S.M. Matyas, C.H. Meyer
 * IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40
 * This module in only based on the code in this paper and is
 * almost definitely not the same as the MIT implementation.
 */
#include "des_locl.h"

/* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */
#define Q_B0(a)	(((DES_LONG)(a)))
#define Q_B1(a)	(((DES_LONG)(a))<<8)
#define Q_B2(a)	(((DES_LONG)(a))<<16)
#define Q_B3(a)	(((DES_LONG)(a))<<24)

/* used to scramble things a bit */
/* Got the value MIT uses via brute force :-) 2/10/90 eay */
#define NOISE	((DES_LONG)83653421L)

DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[],
	     long length, int out_count, DES_cblock *seed)
	{
	DES_LONG z0,z1,t0,t1;
	int i;
	long l;
	const unsigned char *cp;
	DES_LONG *lp;

	if (out_count < 1) out_count=1;
	lp = (DES_LONG *) &(output[0])[0];

	z0=Q_B0((*seed)[0])|Q_B1((*seed)[1])|Q_B2((*seed)[2])|Q_B3((*seed)[3]);
	z1=Q_B0((*seed)[4])|Q_B1((*seed)[5])|Q_B2((*seed)[6])|Q_B3((*seed)[7]);

	for (i=0; ((i<4)&&(i<out_count)); i++)
		{
		cp=input;
		l=length;
		while (l > 0)
			{
			if (l > 1)
				{
				t0= (DES_LONG)(*(cp++));
				t0|=(DES_LONG)Q_B1(*(cp++));
				l--;
				}
			else
				t0= (DES_LONG)(*(cp++));
			l--;
			/* add */
			t0+=z0;
			t0&=0xffffffffL;
			t1=z1;
			/* square, well sort of square */
			z0=((((t0*t0)&0xffffffffL)+((t1*t1)&0xffffffffL))
				&0xffffffffL)%0x7fffffffL;
			z1=((t0*((t1+NOISE)&0xffffffffL))&0xffffffffL)%0x7fffffffL;
			}
		if (lp != NULL)
			{
			/* The MIT library assumes that the checksum is
			 * composed of 2*out_count 32 bit ints */
			*lp++ = z0;
			*lp++ = z1;
			}
		}
	return(z0);
	}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: qud_cksm.c,v 1.7 2014/06/12 15:49:28 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			/* From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer
60			* IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40
61			* This module in only based on the code in this paper and is
62			* almost definitely not the same as the MIT implementation.
63			*/
64			#include "des_locl.h"
65
66			/* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */
67			#define Q_B0(a) (((DES_LONG)(a)))
68			#define Q_B1(a) (((DES_LONG)(a))<<8)
69			#define Q_B2(a) (((DES_LONG)(a))<<16)
70			#define Q_B3(a) (((DES_LONG)(a))<<24)
71
72			/* used to scramble things a bit */
73			/* Got the value MIT uses via brute force :-) 2/10/90 eay */
74			#define NOISE ((DES_LONG)83653421L)
75
76			DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[],
77			long length, int out_count, DES_cblock *seed)
78			{
79			DES_LONG z0,z1,t0,t1;
80			int i;
81			long l;
82			const unsigned char *cp;
83			DES_LONG *lp;
84
85	✗✓	12	if (out_count < 1) out_count=1;
86		6	lp = (DES_LONG *) &(output[0])[0];
87
88		6	z0=Q_B0((seed)[0])\|Q_B1((seed)[1])\|Q_B2((seed)[2])\|Q_B3((seed)[3]);
89		6	z1=Q_B0((seed)[4])\|Q_B1((seed)[5])\|Q_B2((seed)[6])\|Q_B3((seed)[7]);
90
91	✓✗✓✓	54	for (i=0; ((i<4)&&(i<out_count)); i++)
92			{
93			cp=input;
94			l=length;
95	✓✓	360	while (l > 0)
96			{
97	✓✗	168	if (l > 1)
98			{
99			t0= (DES_LONG)(*(cp++));
100		168	t0\|=(DES_LONG)Q_B1(*(cp++));
101		168	l--;
102		168	}
103			else
104			t0= (DES_LONG)(*(cp++));
105		168	l--;
106			/* add */
107		168	t0+=z0;
108		168	t0&=0xffffffffL;
109			t1=z1;
110			/* square, well sort of square */
111		336	z0=((((t0t0)&0xffffffffL)+((t1t1)&0xffffffffL))
112		168	&0xffffffffL)%0x7fffffffL;
113		168	z1=((t0*((t1+NOISE)&0xffffffffL))&0xffffffffL)%0x7fffffffL;
114			}
115	✓✗	12	if (lp != NULL)
116			{
117			/* The MIT library assumes that the checksum is
118			* composed of 2out_count 32 bit ints /
119		12	*lp++ = z0;
120		12	*lp++ = z1;
121		12	}
122			}
123		6	return(z0);
124			}
125