Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/cast/c_enc.c	Lines:	87	105	82.9 %
Date:	2017-11-13	Branches:	12	32	37.5 %


/* $OpenBSD: c_enc.c,v 1.7 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 <openssl/cast.h>
#include "cast_lcl.h"

#ifndef OPENBSD_CAST_ASM
void CAST_encrypt(CAST_LONG *data, const CAST_KEY *key)
	{
	CAST_LONG l,r,t;
	const CAST_LONG *k;

	k= &(key->data[0]);
	l=data[0];
	r=data[1];

	E_CAST( 0,k,l,r,+,^,-);
	E_CAST( 1,k,r,l,^,-,+);
	E_CAST( 2,k,l,r,-,+,^);
	E_CAST( 3,k,r,l,+,^,-);
	E_CAST( 4,k,l,r,^,-,+);
	E_CAST( 5,k,r,l,-,+,^);
	E_CAST( 6,k,l,r,+,^,-);
	E_CAST( 7,k,r,l,^,-,+);
	E_CAST( 8,k,l,r,-,+,^);
	E_CAST( 9,k,r,l,+,^,-);
	E_CAST(10,k,l,r,^,-,+);
	E_CAST(11,k,r,l,-,+,^);
	if(!key->short_key)
	    {
	    E_CAST(12,k,l,r,+,^,-);
	    E_CAST(13,k,r,l,^,-,+);
	    E_CAST(14,k,l,r,-,+,^);
	    E_CAST(15,k,r,l,+,^,-);
	    }

	data[1]=l&0xffffffffL;
	data[0]=r&0xffffffffL;
	}

void CAST_decrypt(CAST_LONG *data, const CAST_KEY *key)
	{
	CAST_LONG l,r,t;
	const CAST_LONG *k;

	k= &(key->data[0]);
	l=data[0];
	r=data[1];

	if(!key->short_key)
	    {
	    E_CAST(15,k,l,r,+,^,-);
	    E_CAST(14,k,r,l,-,+,^);
	    E_CAST(13,k,l,r,^,-,+);
	    E_CAST(12,k,r,l,+,^,-);
	    }
	E_CAST(11,k,l,r,-,+,^);
	E_CAST(10,k,r,l,^,-,+);
	E_CAST( 9,k,l,r,+,^,-);
	E_CAST( 8,k,r,l,-,+,^);
	E_CAST( 7,k,l,r,^,-,+);
	E_CAST( 6,k,r,l,+,^,-);
	E_CAST( 5,k,l,r,-,+,^);
	E_CAST( 4,k,r,l,^,-,+);
	E_CAST( 3,k,l,r,+,^,-);
	E_CAST( 2,k,r,l,-,+,^);
	E_CAST( 1,k,l,r,^,-,+);
	E_CAST( 0,k,r,l,+,^,-);

	data[1]=l&0xffffffffL;
	data[0]=r&0xffffffffL;
	}
#endif

void CAST_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
	     const CAST_KEY *ks, unsigned char *iv, int enc)
	{
	CAST_LONG tin0,tin1;
	CAST_LONG tout0,tout1,xor0,xor1;
	long l=length;
	CAST_LONG tin[2];

	if (enc)
		{
		n2l(iv,tout0);
		n2l(iv,tout1);
		iv-=8;
		for (l-=8; l>=0; l-=8)
			{
			n2l(in,tin0);
			n2l(in,tin1);
			tin0^=tout0;
			tin1^=tout1;
			tin[0]=tin0;
			tin[1]=tin1;
			CAST_encrypt(tin,ks);
			tout0=tin[0];
			tout1=tin[1];
			l2n(tout0,out);
			l2n(tout1,out);
			}
		if (l != -8)
			{
			n2ln(in,tin0,tin1,l+8);
			tin0^=tout0;
			tin1^=tout1;
			tin[0]=tin0;
			tin[1]=tin1;
			CAST_encrypt(tin,ks);
			tout0=tin[0];
			tout1=tin[1];
			l2n(tout0,out);
			l2n(tout1,out);
			}
		l2n(tout0,iv);
		l2n(tout1,iv);
		}
	else
		{
		n2l(iv,xor0);
		n2l(iv,xor1);
		iv-=8;
		for (l-=8; l>=0; l-=8)
			{
			n2l(in,tin0);
			n2l(in,tin1);
			tin[0]=tin0;
			tin[1]=tin1;
			CAST_decrypt(tin,ks);
			tout0=tin[0]^xor0;
			tout1=tin[1]^xor1;
			l2n(tout0,out);
			l2n(tout1,out);
			xor0=tin0;
			xor1=tin1;
			}
		if (l != -8)
			{
			n2l(in,tin0);
			n2l(in,tin1);
			tin[0]=tin0;
			tin[1]=tin1;
			CAST_decrypt(tin,ks);
			tout0=tin[0]^xor0;
			tout1=tin[1]^xor1;
			l2nn(tout0,tout1,out,l+8);
			xor0=tin0;
			xor1=tin1;
			}
		l2n(xor0,iv);
		l2n(xor1,iv);
		}
	tin0=tin1=tout0=tout1=xor0=xor1=0;
	tin[0]=tin[1]=0;
	}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: c_enc.c,v 1.7 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 <openssl/cast.h>
60			#include "cast_lcl.h"
61
62			#ifndef OPENBSD_CAST_ASM
63			void CAST_encrypt(CAST_LONG data, const CAST_KEY key)
64			{
65			CAST_LONG l,r,t;
66			const CAST_LONG *k;
67
68		24006298	k= &(key->data[0]);
69		12003149	l=data[0];
70		12003149	r=data[1];
71
72		12003149	E_CAST( 0,k,l,r,+,^,-);
73		12003149	E_CAST( 1,k,r,l,^,-,+);
74		12003149	E_CAST( 2,k,l,r,-,+,^);
75		12003149	E_CAST( 3,k,r,l,+,^,-);
76		12003149	E_CAST( 4,k,l,r,^,-,+);
77		12003149	E_CAST( 5,k,r,l,-,+,^);
78		12003149	E_CAST( 6,k,l,r,+,^,-);
79		12003149	E_CAST( 7,k,r,l,^,-,+);
80		12003149	E_CAST( 8,k,l,r,-,+,^);
81		12003149	E_CAST( 9,k,r,l,+,^,-);
82		12003149	E_CAST(10,k,l,r,^,-,+);
83		12003149	E_CAST(11,k,r,l,-,+,^);
84	✓✓	12003149	if(!key->short_key)
85			{
86		12003143	E_CAST(12,k,l,r,+,^,-);
87		12003143	E_CAST(13,k,r,l,^,-,+);
88		12003143	E_CAST(14,k,l,r,-,+,^);
89		12003143	E_CAST(15,k,r,l,+,^,-);
90		12003143	}
91
92		12003149	data[1]=l&0xffffffffL;
93		12003149	data[0]=r&0xffffffffL;
94		12003149	}
95
96			void CAST_decrypt(CAST_LONG data, const CAST_KEY key)
97			{
98			CAST_LONG l,r,t;
99			const CAST_LONG *k;
100
101		2794	k= &(key->data[0]);
102		1397	l=data[0];
103		1397	r=data[1];
104
105	✓✓	1397	if(!key->short_key)
106			{
107		1391	E_CAST(15,k,l,r,+,^,-);
108		1391	E_CAST(14,k,r,l,-,+,^);
109		1391	E_CAST(13,k,l,r,^,-,+);
110		1391	E_CAST(12,k,r,l,+,^,-);
111		1391	}
112		1397	E_CAST(11,k,l,r,-,+,^);
113		1397	E_CAST(10,k,r,l,^,-,+);
114		1397	E_CAST( 9,k,l,r,+,^,-);
115		1397	E_CAST( 8,k,r,l,-,+,^);
116		1397	E_CAST( 7,k,l,r,^,-,+);
117		1397	E_CAST( 6,k,r,l,+,^,-);
118		1397	E_CAST( 5,k,l,r,-,+,^);
119		1397	E_CAST( 4,k,r,l,^,-,+);
120		1397	E_CAST( 3,k,l,r,+,^,-);
121		1397	E_CAST( 2,k,r,l,-,+,^);
122		1397	E_CAST( 1,k,l,r,^,-,+);
123		1397	E_CAST( 0,k,r,l,+,^,-);
124
125		1397	data[1]=l&0xffffffffL;
126		1397	data[0]=r&0xffffffffL;
127		1397	}
128			#endif
129
130			void CAST_cbc_encrypt(const unsigned char in, unsigned char out, long length,
131			const CAST_KEY ks, unsigned char iv, int enc)
132			{
133			CAST_LONG tin0,tin1;
134			CAST_LONG tout0,tout1,xor0,xor1;
135			long l=length;
136		476	CAST_LONG tin[2];
137
138	✓✓	238	if (enc)
139			{
140		142	n2l(iv,tout0);
141		142	n2l(iv,tout1);
142		142	iv-=8;
143	✓✓	2184	for (l-=8; l>=0; l-=8)
144			{
145		950	n2l(in,tin0);
146		950	n2l(in,tin1);
147		950	tin0^=tout0;
148		950	tin1^=tout1;
149		950	tin[0]=tin0;
150		950	tin[1]=tin1;
151		950	CAST_encrypt(tin,ks);
152		950	tout0=tin[0];
153		950	tout1=tin[1];
154		950	l2n(tout0,out);
155		950	l2n(tout1,out);
156			}
157	✗✓	142	if (l != -8)
158			{
159			n2ln(in,tin0,tin1,l+8);
160			tin0^=tout0;
161			tin1^=tout1;
162			tin[0]=tin0;
163			tin[1]=tin1;
164			CAST_encrypt(tin,ks);
165			tout0=tin[0];
166			tout1=tin[1];
167			l2n(tout0,out);
168			l2n(tout1,out);
169			}
170		142	l2n(tout0,iv);
171		142	l2n(tout1,iv);
172		142	}
173			else
174			{
175		96	n2l(iv,xor0);
176		96	n2l(iv,xor1);
177		96	iv-=8;
178	✓✓	2092	for (l-=8; l>=0; l-=8)
179			{
180		950	n2l(in,tin0);
181		950	n2l(in,tin1);
182		950	tin[0]=tin0;
183		950	tin[1]=tin1;
184		950	CAST_decrypt(tin,ks);
185		950	tout0=tin[0]^xor0;
186		950	tout1=tin[1]^xor1;
187		950	l2n(tout0,out);
188		950	l2n(tout1,out);
189			xor0=tin0;
190			xor1=tin1;
191			}
192	✗✓	96	if (l != -8)
193			{
194			n2l(in,tin0);
195			n2l(in,tin1);
196			tin[0]=tin0;
197			tin[1]=tin1;
198			CAST_decrypt(tin,ks);
199			tout0=tin[0]^xor0;
200			tout1=tin[1]^xor1;
201			l2nn(tout0,tout1,out,l+8);
202			xor0=tin0;
203			xor1=tin1;
204			}
205		96	l2n(xor0,iv);
206		96	l2n(xor1,iv);
207			}
208			tin0=tin1=tout0=tout1=xor0=xor1=0;
209		238	tin[0]=tin[1]=0;
210		238	}