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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/des/enc_read.c	Lines:	0	51	0.0 %
Date:	2017-11-07	Branches:	0	48	0.0 %


/* $OpenBSD: enc_read.c,v 1.15 2015/02/12 03:54:07 jsing 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 <errno.h>
#include <stdio.h>

#include <openssl/opensslconf.h>

#include "des_locl.h"

/* This has some uglies in it but it works - even over sockets. */
/*extern int errno;*/
int DES_rw_mode = DES_PCBC_MODE;

/*
 * WARNINGS:
 *
 *  -  The data format used by DES_enc_write() and DES_enc_read()
 *     has a cryptographic weakness: When asked to write more
 *     than MAXWRITE bytes, DES_enc_write will split the data
 *     into several chunks that are all encrypted
 *     using the same IV.  So don't use these functions unless you
 *     are sure you know what you do (in which case you might
 *     not want to use them anyway).
 *
 *  -  This code cannot handle non-blocking sockets.
 *
 *  -  This function uses an internal state and thus cannot be
 *     used on multiple files.
 */


int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched,
		 DES_cblock *iv)
	{
	/* data to be unencrypted */
	int net_num=0;
	static unsigned char *net=NULL;
	/* extra unencrypted data
	 * for when a block of 100 comes in but is des_read one byte at
	 * a time. */
	static unsigned char *unnet=NULL;
	static int unnet_start=0;
	static int unnet_left=0;
	static unsigned char *tmpbuf=NULL;
	int i;
	long num=0,rnum;
	unsigned char *p;

	if (tmpbuf == NULL)
		{
		tmpbuf=malloc(BSIZE);
		if (tmpbuf == NULL) return(-1);
		}
	if (net == NULL)
		{
		net=malloc(BSIZE);
		if (net == NULL) return(-1);
		}
	if (unnet == NULL)
		{
		unnet=malloc(BSIZE);
		if (unnet == NULL) return(-1);
		}
	/* left over data from last decrypt */
	if (unnet_left != 0)
		{
		if (unnet_left < len)
			{
			/* we still still need more data but will return
			 * with the number of bytes we have - should always
			 * check the return value */
			memcpy(buf,&(unnet[unnet_start]),
			       unnet_left);
			/* eay 26/08/92 I had the next 2 lines
			 * reversed :-( */
			i=unnet_left;
			unnet_start=unnet_left=0;
			}
		else
			{
			memcpy(buf,&(unnet[unnet_start]),len);
			unnet_start+=len;
			unnet_left-=len;
			i=len;
			}
		return(i);
		}

	/* We need to get more data. */
	if (len > MAXWRITE) len=MAXWRITE;

	/* first - get the length */
	while (net_num < HDRSIZE)
		{
		i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
#ifdef EINTR
		if ((i == -1) && (errno == EINTR)) continue;
#endif
		if (i <= 0) return(0);
		net_num+=i;
		}

	/* we now have at net_num bytes in net */
	p=net;
	/* num=0;  */
	n2l(p,num);
	/* num should be rounded up to the next group of eight
	 * we make sure that we have read a multiple of 8 bytes from the net.
	 */
	if ((num > MAXWRITE) || (num < 0)) /* error */
		return(-1);
	rnum=(num < 8)?8:((num+7)/8*8);

	net_num=0;
	while (net_num < rnum)
		{
		i=read(fd,(void *)&(net[net_num]),rnum-net_num);
#ifdef EINTR
		if ((i == -1) && (errno == EINTR)) continue;
#endif
		if (i <= 0) return(0);
		net_num+=i;
		}

	/* Check if there will be data left over. */
	if (len < num)
		{
		if (DES_rw_mode & DES_PCBC_MODE)
			DES_pcbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
		else
			DES_cbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
		memcpy(buf,unnet,len);
		unnet_start=len;
		unnet_left=num-len;

		/* The following line is done because we return num
		 * as the number of bytes read. */
		num=len;
		}
	else
		{
		/* >output is a multiple of 8 byes, if len < rnum
		 * >we must be careful.  The user must be aware that this
		 * >routine will write more bytes than he asked for.
		 * >The length of the buffer must be correct.
		 * FIXED - Should be ok now 18-9-90 - eay */
		if (len < rnum)
			{

			if (DES_rw_mode & DES_PCBC_MODE)
				DES_pcbc_encrypt(net,tmpbuf,num,sched,iv,
						 DES_DECRYPT);
			else
				DES_cbc_encrypt(net,tmpbuf,num,sched,iv,
						DES_DECRYPT);

			/* eay 26/08/92 fix a bug that returned more
			 * bytes than you asked for (returned len bytes :-( */
			memcpy(buf,tmpbuf,num);
			}
		else
			{
			if (DES_rw_mode & DES_PCBC_MODE)
				DES_pcbc_encrypt(net,buf,num,sched,iv,
						 DES_DECRYPT);
			else
				DES_cbc_encrypt(net,buf,num,sched,iv,
						DES_DECRYPT);
			}
		}
	return num;
	}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: enc_read.c,v 1.15 2015/02/12 03:54:07 jsing 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 <errno.h>
60			#include <stdio.h>
61
62			#include <openssl/opensslconf.h>
63
64			#include "des_locl.h"
65
66			/* This has some uglies in it but it works - even over sockets. */
67			/extern int errno;/
68			int DES_rw_mode = DES_PCBC_MODE;
69
70			/*
71			* WARNINGS:
72			*
73			* - The data format used by DES_enc_write() and DES_enc_read()
74			* has a cryptographic weakness: When asked to write more
75			* than MAXWRITE bytes, DES_enc_write will split the data
76			* into several chunks that are all encrypted
77			* using the same IV. So don't use these functions unless you
78			* are sure you know what you do (in which case you might
79			* not want to use them anyway).
80			*
81			* - This code cannot handle non-blocking sockets.
82			*
83			* - This function uses an internal state and thus cannot be
84			* used on multiple files.
85			*/
86
87
88			int DES_enc_read(int fd, void buf, int len, DES_key_schedule sched,
89			DES_cblock *iv)
90			{
91			/* data to be unencrypted */
92			int net_num=0;
93			static unsigned char *net=NULL;
94			/* extra unencrypted data
95			* for when a block of 100 comes in but is des_read one byte at
96			* a time. */
97			static unsigned char *unnet=NULL;
98			static int unnet_start=0;
99			static int unnet_left=0;
100			static unsigned char *tmpbuf=NULL;
101			int i;
102			long num=0,rnum;
103			unsigned char *p;
104
105			if (tmpbuf == NULL)
106			{
107			tmpbuf=malloc(BSIZE);
108			if (tmpbuf == NULL) return(-1);
109			}
110			if (net == NULL)
111			{
112			net=malloc(BSIZE);
113			if (net == NULL) return(-1);
114			}
115			if (unnet == NULL)
116			{
117			unnet=malloc(BSIZE);
118			if (unnet == NULL) return(-1);
119			}
120			/* left over data from last decrypt */
121			if (unnet_left != 0)
122			{
123			if (unnet_left < len)
124			{
125			/* we still still need more data but will return
126			* with the number of bytes we have - should always
127			* check the return value */
128			memcpy(buf,&(unnet[unnet_start]),
129			unnet_left);
130			/* eay 26/08/92 I had the next 2 lines
131			* reversed :-( */
132			i=unnet_left;
133			unnet_start=unnet_left=0;
134			}
135			else
136			{
137			memcpy(buf,&(unnet[unnet_start]),len);
138			unnet_start+=len;
139			unnet_left-=len;
140			i=len;
141			}
142			return(i);
143			}
144
145			/* We need to get more data. */
146			if (len > MAXWRITE) len=MAXWRITE;
147
148			/* first - get the length */
149			while (net_num < HDRSIZE)
150			{
151			i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
152			#ifdef EINTR
153			if ((i == -1) && (errno == EINTR)) continue;
154			#endif
155			if (i <= 0) return(0);
156			net_num+=i;
157			}
158
159			/* we now have at net_num bytes in net */
160			p=net;
161			/* num=0; */
162			n2l(p,num);
163			/* num should be rounded up to the next group of eight
164			* we make sure that we have read a multiple of 8 bytes from the net.
165			*/
166			if ((num > MAXWRITE) \|\| (num < 0)) /* error */
167			return(-1);
168			rnum=(num < 8)?8:((num+7)/8*8);
169
170			net_num=0;
171			while (net_num < rnum)
172			{
173			i=read(fd,(void *)&(net[net_num]),rnum-net_num);
174			#ifdef EINTR
175			if ((i == -1) && (errno == EINTR)) continue;
176			#endif
177			if (i <= 0) return(0);
178			net_num+=i;
179			}
180
181			/* Check if there will be data left over. */
182			if (len < num)
183			{
184			if (DES_rw_mode & DES_PCBC_MODE)
185			DES_pcbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
186			else
187			DES_cbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
188			memcpy(buf,unnet,len);
189			unnet_start=len;
190			unnet_left=num-len;
191
192			/* The following line is done because we return num
193			* as the number of bytes read. */
194			num=len;
195			}
196			else
197			{
198			/* >output is a multiple of 8 byes, if len < rnum
199			* >we must be careful. The user must be aware that this
200			* >routine will write more bytes than he asked for.
201			* >The length of the buffer must be correct.
202			* FIXED - Should be ok now 18-9-90 - eay */
203			if (len < rnum)
204			{
205
206			if (DES_rw_mode & DES_PCBC_MODE)
207			DES_pcbc_encrypt(net,tmpbuf,num,sched,iv,
208			DES_DECRYPT);
209			else
210			DES_cbc_encrypt(net,tmpbuf,num,sched,iv,
211			DES_DECRYPT);
212
213			/* eay 26/08/92 fix a bug that returned more
214			* bytes than you asked for (returned len bytes :-( */
215			memcpy(buf,tmpbuf,num);
216			}
217			else
218			{
219			if (DES_rw_mode & DES_PCBC_MODE)
220			DES_pcbc_encrypt(net,buf,num,sched,iv,
221			DES_DECRYPT);
222			else
223			DES_cbc_encrypt(net,buf,num,sched,iv,
224			DES_DECRYPT);
225			}
226			}
227			return num;
228			}
229