Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/des/cfb64ede.c	Lines:	40	105	38.1 %
Date:	2017-11-07	Branches:	10	70	14.3 %


/* $OpenBSD: cfb64ede.c,v 1.9 2015/02/07 13:19:15 doug 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"

/* The input and output encrypted as though 64bit cfb mode is being
 * used.  The extra state information to record how much of the
 * 64bit block we have used is contained in *num;
 */

void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out,
			    long length, DES_key_schedule *ks1,
			    DES_key_schedule *ks2, DES_key_schedule *ks3,
			    DES_cblock *ivec, int *num, int enc)
	{
	DES_LONG v0,v1;
	long l=length;
	int n= *num;
	DES_LONG ti[2];
	unsigned char *iv,c,cc;

	iv=&(*ivec)[0];
	if (enc)
		{
		while (l--)
			{
			if (n == 0)
				{
				c2l(iv,v0);
				c2l(iv,v1);

				ti[0]=v0;
				ti[1]=v1;
				DES_encrypt3(ti,ks1,ks2,ks3);
				v0=ti[0];
				v1=ti[1];

				iv = &(*ivec)[0];
				l2c(v0,iv);
				l2c(v1,iv);
				iv = &(*ivec)[0];
				}
			c= *(in++)^iv[n];
			*(out++)=c;
			iv[n]=c;
			n=(n+1)&0x07;
			}
		}
	else
		{
		while (l--)
			{
			if (n == 0)
				{
				c2l(iv,v0);
				c2l(iv,v1);

				ti[0]=v0;
				ti[1]=v1;
				DES_encrypt3(ti,ks1,ks2,ks3);
				v0=ti[0];
				v1=ti[1];

				iv = &(*ivec)[0];
				l2c(v0,iv);
				l2c(v1,iv);
				iv = &(*ivec)[0];
				}
			cc= *(in++);
			c=iv[n];
			iv[n]=cc;
			*(out++)=c^cc;
			n=(n+1)&0x07;
			}
		}
	v0=v1=ti[0]=ti[1]=c=cc=0;
	*num=n;
	}

/* This is compatible with the single key CFB-r for DES, even thought that's
 * not what EVP needs.
 */

void DES_ede3_cfb_encrypt(const unsigned char *in,unsigned char *out,
			  int numbits,long length,DES_key_schedule *ks1,
			  DES_key_schedule *ks2,DES_key_schedule *ks3,
			  DES_cblock *ivec,int enc)
	{
	DES_LONG d0,d1,v0,v1;
	unsigned long l=length,n=((unsigned int)numbits+7)/8;
	int num=numbits,i;
	DES_LONG ti[2];
	unsigned char *iv;
	unsigned char ovec[16];

	if (num > 64) return;
	iv = &(*ivec)[0];
	c2l(iv,v0);
	c2l(iv,v1);
	if (enc)
		{
		while (l >= n)
			{
			l-=n;
			ti[0]=v0;
			ti[1]=v1;
			DES_encrypt3(ti,ks1,ks2,ks3);
			c2ln(in,d0,d1,n);
			in+=n;
			d0^=ti[0];
			d1^=ti[1];
			l2cn(d0,d1,out,n);
			out+=n;
			/* 30-08-94 - eay - changed because l>>32 and
			 * l<<32 are bad under gcc :-( */
			if (num == 32)
				{ v0=v1; v1=d0; }
			else if (num == 64)
				{ v0=d0; v1=d1; }
			else
				{
				iv=&ovec[0];
				l2c(v0,iv);
				l2c(v1,iv);
				l2c(d0,iv);
				l2c(d1,iv);
				/* shift ovec left most of the bits... */
				memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0));
				/* now the remaining bits */
				if(num%8 != 0)
					for(i=0 ; i < 8 ; ++i)
						{
						ovec[i]<<=num%8;
						ovec[i]|=ovec[i+1]>>(8-num%8);
						}
				iv=&ovec[0];
				c2l(iv,v0);
				c2l(iv,v1);
				}
			}
		}
	else
		{
		while (l >= n)
			{
			l-=n;
			ti[0]=v0;
			ti[1]=v1;
			DES_encrypt3(ti,ks1,ks2,ks3);
			c2ln(in,d0,d1,n);
			in+=n;
			/* 30-08-94 - eay - changed because l>>32 and
			 * l<<32 are bad under gcc :-( */
			if (num == 32)
				{ v0=v1; v1=d0; }
			else if (num == 64)
				{ v0=d0; v1=d1; }
			else
				{
				iv=&ovec[0];
				l2c(v0,iv);
				l2c(v1,iv);
				l2c(d0,iv);
				l2c(d1,iv);
				/* shift ovec left most of the bits... */
				memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0));
				/* now the remaining bits */
				if(num%8 != 0)
					for(i=0 ; i < 8 ; ++i)
						{
						ovec[i]<<=num%8;
						ovec[i]|=ovec[i+1]>>(8-num%8);
						}
				iv=&ovec[0];
				c2l(iv,v0);
				c2l(iv,v1);
				}
			d0^=ti[0];
			d1^=ti[1];
			l2cn(d0,d1,out,n);
			out+=n;
			}
		}
	iv = &(*ivec)[0];
	l2c(v0,iv);
	l2c(v1,iv);
	v0=v1=d0=d1=ti[0]=ti[1]=0;
	}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cfb64ede.c,v 1.9 2015/02/07 13:19:15 doug 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			/* The input and output encrypted as though 64bit cfb mode is being
62			* used. The extra state information to record how much of the
63			* 64bit block we have used is contained in *num;
64			*/
65
66			void DES_ede3_cfb64_encrypt(const unsigned char in, unsigned char out,
67			long length, DES_key_schedule *ks1,
68			DES_key_schedule ks2, DES_key_schedule ks3,
69			DES_cblock ivec, int num, int enc)
70			{
71			DES_LONG v0,v1;
72			long l=length;
73		288	int n= *num;
74		144	DES_LONG ti[2];
75			unsigned char *iv,c,cc;
76
77		144	iv=&(*ivec)[0];
78	✓✓	144	if (enc)
79			{
80	✓✓	14344	while (l--)
81			{
82	✓✓	7132	if (n == 0)
83			{
84		894	c2l(iv,v0);
85		894	c2l(iv,v1);
86
87		894	ti[0]=v0;
88		894	ti[1]=v1;
89		894	DES_encrypt3(ti,ks1,ks2,ks3);
90		894	v0=ti[0];
91		894	v1=ti[1];
92
93			iv = &(*ivec)[0];
94		894	l2c(v0,iv);
95		894	l2c(v1,iv);
96			iv = &(*ivec)[0];
97		894	}
98		7132	c= *(in++)^iv[n];
99		7132	*(out++)=c;
100		7132	iv[n]=c;
101		7132	n=(n+1)&0x07;
102			}
103			}
104			else
105			{
106	✓✓	14328	while (l--)
107			{
108	✓✓	7132	if (n == 0)
109			{
110		894	c2l(iv,v0);
111		894	c2l(iv,v1);
112
113		894	ti[0]=v0;
114		894	ti[1]=v1;
115		894	DES_encrypt3(ti,ks1,ks2,ks3);
116		894	v0=ti[0];
117		894	v1=ti[1];
118
119			iv = &(*ivec)[0];
120		894	l2c(v0,iv);
121		894	l2c(v1,iv);
122			iv = &(*ivec)[0];
123		894	}
124		7132	cc= *(in++);
125		7132	c=iv[n];
126		7132	iv[n]=cc;
127		7132	*(out++)=c^cc;
128		7132	n=(n+1)&0x07;
129			}
130			}
131		144	v0=v1=ti[0]=ti[1]=c=cc=0;
132		144	*num=n;
133		144	}
134
135			/* This is compatible with the single key CFB-r for DES, even thought that's
136			* not what EVP needs.
137			*/
138
139			void DES_ede3_cfb_encrypt(const unsigned char in,unsigned char out,
140			int numbits,long length,DES_key_schedule *ks1,
141			DES_key_schedule ks2,DES_key_schedule ks3,
142			DES_cblock *ivec,int enc)
143			{
144			DES_LONG d0,d1,v0,v1;
145			unsigned long l=length,n=((unsigned int)numbits+7)/8;
146			int num=numbits,i;
147			DES_LONG ti[2];
148			unsigned char *iv;
149			unsigned char ovec[16];
150
151			if (num > 64) return;
152			iv = &(*ivec)[0];
153			c2l(iv,v0);
154			c2l(iv,v1);
155			if (enc)
156			{
157			while (l >= n)
158			{
159			l-=n;
160			ti[0]=v0;
161			ti[1]=v1;
162			DES_encrypt3(ti,ks1,ks2,ks3);
163			c2ln(in,d0,d1,n);
164			in+=n;
165			d0^=ti[0];
166			d1^=ti[1];
167			l2cn(d0,d1,out,n);
168			out+=n;
169			/* 30-08-94 - eay - changed because l>>32 and
170			* l<<32 are bad under gcc :-( */
171			if (num == 32)
172			{ v0=v1; v1=d0; }
173			else if (num == 64)
174			{ v0=d0; v1=d1; }
175			else
176			{
177			iv=&ovec[0];
178			l2c(v0,iv);
179			l2c(v1,iv);
180			l2c(d0,iv);
181			l2c(d1,iv);
182			/* shift ovec left most of the bits... */
183			memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0));
184			/* now the remaining bits */
185			if(num%8 != 0)
186			for(i=0 ; i < 8 ; ++i)
187			{
188			ovec[i]<<=num%8;
189			ovec[i]\|=ovec[i+1]>>(8-num%8);
190			}
191			iv=&ovec[0];
192			c2l(iv,v0);
193			c2l(iv,v1);
194			}
195			}
196			}
197			else
198			{
199			while (l >= n)
200			{
201			l-=n;
202			ti[0]=v0;
203			ti[1]=v1;
204			DES_encrypt3(ti,ks1,ks2,ks3);
205			c2ln(in,d0,d1,n);
206			in+=n;
207			/* 30-08-94 - eay - changed because l>>32 and
208			* l<<32 are bad under gcc :-( */
209			if (num == 32)
210			{ v0=v1; v1=d0; }
211			else if (num == 64)
212			{ v0=d0; v1=d1; }
213			else
214			{
215			iv=&ovec[0];
216			l2c(v0,iv);
217			l2c(v1,iv);
218			l2c(d0,iv);
219			l2c(d1,iv);
220			/* shift ovec left most of the bits... */
221			memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0));
222			/* now the remaining bits */
223			if(num%8 != 0)
224			for(i=0 ; i < 8 ; ++i)
225			{
226			ovec[i]<<=num%8;
227			ovec[i]\|=ovec[i+1]>>(8-num%8);
228			}
229			iv=&ovec[0];
230			c2l(iv,v0);
231			c2l(iv,v1);
232			}
233			d0^=ti[0];
234			d1^=ti[1];
235			l2cn(d0,d1,out,n);
236			out+=n;
237			}
238			}
239			iv = &(*ivec)[0];
240			l2c(v0,iv);
241			l2c(v1,iv);
242			v0=v1=d0=d1=ti[0]=ti[1]=0;
243			}
244