Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/rc2/rc2_cbc.c	Lines:	90	104	86.5 %
Date:	2017-11-13	Branches:	16	36	44.4 %


/* $OpenBSD: rc2_cbc.c,v 1.5 2014/10/28 07:35:59 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/rc2.h>
#include "rc2_locl.h"

void RC2_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
	     RC2_KEY *ks, unsigned char *iv, int encrypt)
	{
	unsigned long tin0,tin1;
	unsigned long tout0,tout1,xor0,xor1;
	long l=length;
	unsigned long tin[2];

	if (encrypt)
		{
		c2l(iv,tout0);
		c2l(iv,tout1);
		iv-=8;
		for (l-=8; l>=0; l-=8)
			{
			c2l(in,tin0);
			c2l(in,tin1);
			tin0^=tout0;
			tin1^=tout1;
			tin[0]=tin0;
			tin[1]=tin1;
			RC2_encrypt(tin,ks);
			tout0=tin[0]; l2c(tout0,out);
			tout1=tin[1]; l2c(tout1,out);
			}
		if (l != -8)
			{
			c2ln(in,tin0,tin1,l+8);
			tin0^=tout0;
			tin1^=tout1;
			tin[0]=tin0;
			tin[1]=tin1;
			RC2_encrypt(tin,ks);
			tout0=tin[0]; l2c(tout0,out);
			tout1=tin[1]; l2c(tout1,out);
			}
		l2c(tout0,iv);
		l2c(tout1,iv);
		}
	else
		{
		c2l(iv,xor0);
		c2l(iv,xor1);
		iv-=8;
		for (l-=8; l>=0; l-=8)
			{
			c2l(in,tin0); tin[0]=tin0;
			c2l(in,tin1); tin[1]=tin1;
			RC2_decrypt(tin,ks);
			tout0=tin[0]^xor0;
			tout1=tin[1]^xor1;
			l2c(tout0,out);
			l2c(tout1,out);
			xor0=tin0;
			xor1=tin1;
			}
		if (l != -8)
			{
			c2l(in,tin0); tin[0]=tin0;
			c2l(in,tin1); tin[1]=tin1;
			RC2_decrypt(tin,ks);
			tout0=tin[0]^xor0;
			tout1=tin[1]^xor1;
			l2cn(tout0,tout1,out,l+8);
			xor0=tin0;
			xor1=tin1;
			}
		l2c(xor0,iv);
		l2c(xor1,iv);
		}
	tin0=tin1=tout0=tout1=xor0=xor1=0;
	tin[0]=tin[1]=0;
	}

void RC2_encrypt(unsigned long *d, RC2_KEY *key)
	{
	int i,n;
	RC2_INT *p0,*p1;
	RC2_INT x0,x1,x2,x3,t;
	unsigned long l;

	l=d[0];
	x0=(RC2_INT)l&0xffff;
	x1=(RC2_INT)(l>>16L);
	l=d[1];
	x2=(RC2_INT)l&0xffff;
	x3=(RC2_INT)(l>>16L);

	n=3;
	i=5;

	p0=p1= &(key->data[0]);
	for (;;)
		{
		t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff;
		x0=(t<<1)|(t>>15);
		t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff;
		x1=(t<<2)|(t>>14);
		t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff;
		x2=(t<<3)|(t>>13);
		t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff;
		x3=(t<<5)|(t>>11);

		if (--i == 0)
			{
			if (--n == 0) break;
			i=(n == 2)?6:5;

			x0+=p1[x3&0x3f];
			x1+=p1[x0&0x3f];
			x2+=p1[x1&0x3f];
			x3+=p1[x2&0x3f];
			}
		}

	d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
	d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
	}

void RC2_decrypt(unsigned long *d, RC2_KEY *key)
	{
	int i,n;
	RC2_INT *p0,*p1;
	RC2_INT x0,x1,x2,x3,t;
	unsigned long l;

	l=d[0];
	x0=(RC2_INT)l&0xffff;
	x1=(RC2_INT)(l>>16L);
	l=d[1];
	x2=(RC2_INT)l&0xffff;
	x3=(RC2_INT)(l>>16L);

	n=3;
	i=5;

	p0= &(key->data[63]);
	p1= &(key->data[0]);
	for (;;)
		{
		t=((x3<<11)|(x3>>5))&0xffff;
		x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff;
		t=((x2<<13)|(x2>>3))&0xffff;
		x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff;
		t=((x1<<14)|(x1>>2))&0xffff;
		x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff;
		t=((x0<<15)|(x0>>1))&0xffff;
		x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff;

		if (--i == 0)
			{
			if (--n == 0) break;
			i=(n == 2)?6:5;

			x3=(x3-p1[x2&0x3f])&0xffff;
			x2=(x2-p1[x1&0x3f])&0xffff;
			x1=(x1-p1[x0&0x3f])&0xffff;
			x0=(x0-p1[x3&0x3f])&0xffff;
			}
		}

	d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
	d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
	}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: rc2_cbc.c,v 1.5 2014/10/28 07:35:59 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/rc2.h>
60			#include "rc2_locl.h"
61
62			void RC2_cbc_encrypt(const unsigned char in, unsigned char out, long length,
63			RC2_KEY ks, unsigned char iv, int encrypt)
64			{
65			unsigned long tin0,tin1;
66			unsigned long tout0,tout1,xor0,xor1;
67			long l=length;
68		696	unsigned long tin[2];
69
70	✓✓	348	if (encrypt)
71			{
72		208	c2l(iv,tout0);
73		208	c2l(iv,tout1);
74		208	iv-=8;
75	✓✓	3064	for (l-=8; l>=0; l-=8)
76			{
77		1324	c2l(in,tin0);
78		1324	c2l(in,tin1);
79		1324	tin0^=tout0;
80		1324	tin1^=tout1;
81		1324	tin[0]=tin0;
82		1324	tin[1]=tin1;
83		1324	RC2_encrypt(tin,ks);
84		1324	tout0=tin[0]; l2c(tout0,out);
85		1324	tout1=tin[1]; l2c(tout1,out);
86			}
87	✗✓	208	if (l != -8)
88			{
89			c2ln(in,tin0,tin1,l+8);
90			tin0^=tout0;
91			tin1^=tout1;
92			tin[0]=tin0;
93			tin[1]=tin1;
94			RC2_encrypt(tin,ks);
95			tout0=tin[0]; l2c(tout0,out);
96			tout1=tin[1]; l2c(tout1,out);
97			}
98		208	l2c(tout0,iv);
99		208	l2c(tout1,iv);
100		208	}
101			else
102			{
103		140	c2l(iv,xor0);
104		140	c2l(iv,xor1);
105		140	iv-=8;
106	✓✓	2928	for (l-=8; l>=0; l-=8)
107			{
108		1324	c2l(in,tin0); tin[0]=tin0;
109		1324	c2l(in,tin1); tin[1]=tin1;
110		1324	RC2_decrypt(tin,ks);
111		1324	tout0=tin[0]^xor0;
112		1324	tout1=tin[1]^xor1;
113		1324	l2c(tout0,out);
114		1324	l2c(tout1,out);
115			xor0=tin0;
116			xor1=tin1;
117			}
118	✗✓	140	if (l != -8)
119			{
120			c2l(in,tin0); tin[0]=tin0;
121			c2l(in,tin1); tin[1]=tin1;
122			RC2_decrypt(tin,ks);
123			tout0=tin[0]^xor0;
124			tout1=tin[1]^xor1;
125			l2cn(tout0,tout1,out,l+8);
126			xor0=tin0;
127			xor1=tin1;
128			}
129		140	l2c(xor0,iv);
130		140	l2c(xor1,iv);
131			}
132			tin0=tin1=tout0=tout1=xor0=xor1=0;
133		348	tin[0]=tin[1]=0;
134		348	}
135
136			void RC2_encrypt(unsigned long d, RC2_KEY key)
137			{
138			int i,n;
139			RC2_INT p0,p1;
140			RC2_INT x0,x1,x2,x3,t;
141			unsigned long l;
142
143		7052	l=d[0];
144		3526	x0=(RC2_INT)l&0xffff;
145		3526	x1=(RC2_INT)(l>>16L);
146		3526	l=d[1];
147		3526	x2=(RC2_INT)l&0xffff;
148		3526	x3=(RC2_INT)(l>>16L);
149
150			n=3;
151			i=5;
152
153		3526	p0=p1= &(key->data[0]);
154		56416	for (;;)
155			{
156		56416	t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff;
157		56416	x0=(t<<1)\|(t>>15);
158		56416	t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff;
159		56416	x1=(t<<2)\|(t>>14);
160		56416	t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff;
161		56416	x2=(t<<3)\|(t>>13);
162		56416	t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff;
163		56416	x3=(t<<5)\|(t>>11);
164
165	✓✓	56416	if (--i == 0)
166			{
167	✓✓	10578	if (--n == 0) break;
168		7052	i=(n == 2)?6:5;
169
170		7052	x0+=p1[x3&0x3f];
171		7052	x1+=p1[x0&0x3f];
172		7052	x2+=p1[x1&0x3f];
173		7052	x3+=p1[x2&0x3f];
174		7052	}
175			}
176
177		3526	d[0]=(unsigned long)(x0&0xffff)\|((unsigned long)(x1&0xffff)<<16L);
178		3526	d[1]=(unsigned long)(x2&0xffff)\|((unsigned long)(x3&0xffff)<<16L);
179		3526	}
180
181			void RC2_decrypt(unsigned long d, RC2_KEY key)
182			{
183			int i,n;
184			RC2_INT p0,p1;
185			RC2_INT x0,x1,x2,x3,t;
186			unsigned long l;
187
188		3548	l=d[0];
189		1774	x0=(RC2_INT)l&0xffff;
190		1774	x1=(RC2_INT)(l>>16L);
191		1774	l=d[1];
192		1774	x2=(RC2_INT)l&0xffff;
193		1774	x3=(RC2_INT)(l>>16L);
194
195			n=3;
196			i=5;
197
198		1774	p0= &(key->data[63]);
199		1774	p1= &(key->data[0]);
200		28384	for (;;)
201			{
202		28384	t=((x3<<11)\|(x3>>5))&0xffff;
203		28384	x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff;
204		28384	t=((x2<<13)\|(x2>>3))&0xffff;
205		28384	x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff;
206		28384	t=((x1<<14)\|(x1>>2))&0xffff;
207		28384	x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff;
208		28384	t=((x0<<15)\|(x0>>1))&0xffff;
209		28384	x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff;
210
211	✓✓	28384	if (--i == 0)
212			{
213	✓✓	5322	if (--n == 0) break;
214		3548	i=(n == 2)?6:5;
215
216		3548	x3=(x3-p1[x2&0x3f])&0xffff;
217		3548	x2=(x2-p1[x1&0x3f])&0xffff;
218		3548	x1=(x1-p1[x0&0x3f])&0xffff;
219		3548	x0=(x0-p1[x3&0x3f])&0xffff;
220		3548	}
221			}
222
223		1774	d[0]=(unsigned long)(x0&0xffff)\|((unsigned long)(x1&0xffff)<<16L);
224		1774	d[1]=(unsigned long)(x2&0xffff)\|((unsigned long)(x3&0xffff)<<16L);
225		1774	}
226