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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/des/enc_writ.c	Lines:	0	31	0.0 %
Date:	2017-11-07	Branches:	0	24	0.0 %


/* $OpenBSD: enc_writ.c,v 1.14 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 <stdlib.h>
#include <time.h>

#include <openssl/opensslconf.h>

#include "des_locl.h"

/*
 * 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.
 */

int DES_enc_write(int fd, const void *_buf, int len,
		  DES_key_schedule *sched, DES_cblock *iv)
	{
#ifdef _LIBC
	extern unsigned long time();
	extern int write();
#endif
	const unsigned char *buf=_buf;
	long rnum;
	int i,j,k,outnum;
	static unsigned char *outbuf=NULL;
	unsigned char shortbuf[8];
	unsigned char *p;
	const unsigned char *cp;
	static int start=1;

	if (outbuf == NULL)
		{
		outbuf=malloc(BSIZE+HDRSIZE);
		if (outbuf == NULL) return(-1);
		}
	/* If we are sending less than 8 bytes, the same char will look
	 * the same if we don't pad it out with random bytes */
	if (start)
		{
		start=0;
		}

	/* lets recurse if we want to send the data in small chunks */
	if (len > MAXWRITE)
		{
		j=0;
		for (i=0; i<len; i+=k)
			{
			k=DES_enc_write(fd,&(buf[i]),
				((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv);
			if (k < 0)
				return(k);
			else
				j+=k;
			}
		return(j);
		}

	/* write length first */
	p=outbuf;
	l2n(len,p);

	/* pad short strings */
	if (len < 8)
		{
		cp=shortbuf;
		memcpy(shortbuf,buf,len);
		arc4random_buf(shortbuf+len, 8-len);
		rnum=8;
		}
	else
		{
		cp=buf;
		rnum=((len+7)/8*8); /* round up to nearest eight */
		}

	if (DES_rw_mode & DES_PCBC_MODE)
		DES_pcbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
				 DES_ENCRYPT);
	else
		DES_cbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
				DES_ENCRYPT);

	/* output */
	outnum=rnum+HDRSIZE;

	for (j=0; j<outnum; j+=i)
		{
		/* eay 26/08/92 I was not doing writing from where we
		 * got up to. */
		i=write(fd,(void *)&(outbuf[j]),outnum-j);
		if (i == -1)
			{
#ifdef EINTR
			if (errno == EINTR)
				i=0;
			else
#endif
			        /* This is really a bad error - very bad
				 * It will stuff-up both ends. */
				return(-1);
			}
		}

	return(len);
	}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: enc_writ.c,v 1.14 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			#include <stdlib.h>
62			#include <time.h>
63
64			#include <openssl/opensslconf.h>
65
66			#include "des_locl.h"
67
68			/*
69			* WARNINGS:
70			*
71			* - The data format used by DES_enc_write() and DES_enc_read()
72			* has a cryptographic weakness: When asked to write more
73			* than MAXWRITE bytes, DES_enc_write will split the data
74			* into several chunks that are all encrypted
75			* using the same IV. So don't use these functions unless you
76			* are sure you know what you do (in which case you might
77			* not want to use them anyway).
78			*
79			* - This code cannot handle non-blocking sockets.
80			*/
81
82			int DES_enc_write(int fd, const void *_buf, int len,
83			DES_key_schedule sched, DES_cblock iv)
84			{
85			#ifdef _LIBC
86			extern unsigned long time();
87			extern int write();
88			#endif
89			const unsigned char *buf=_buf;
90			long rnum;
91			int i,j,k,outnum;
92			static unsigned char *outbuf=NULL;
93			unsigned char shortbuf[8];
94			unsigned char *p;
95			const unsigned char *cp;
96			static int start=1;
97
98			if (outbuf == NULL)
99			{
100			outbuf=malloc(BSIZE+HDRSIZE);
101			if (outbuf == NULL) return(-1);
102			}
103			/* If we are sending less than 8 bytes, the same char will look
104			* the same if we don't pad it out with random bytes */
105			if (start)
106			{
107			start=0;
108			}
109
110			/* lets recurse if we want to send the data in small chunks */
111			if (len > MAXWRITE)
112			{
113			j=0;
114			for (i=0; i<len; i+=k)
115			{
116			k=DES_enc_write(fd,&(buf[i]),
117			((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv);
118			if (k < 0)
119			return(k);
120			else
121			j+=k;
122			}
123			return(j);
124			}
125
126			/* write length first */
127			p=outbuf;
128			l2n(len,p);
129
130			/* pad short strings */
131			if (len < 8)
132			{
133			cp=shortbuf;
134			memcpy(shortbuf,buf,len);
135			arc4random_buf(shortbuf+len, 8-len);
136			rnum=8;
137			}
138			else
139			{
140			cp=buf;
141			rnum=((len+7)/88); / round up to nearest eight */
142			}
143
144			if (DES_rw_mode & DES_PCBC_MODE)
145			DES_pcbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
146			DES_ENCRYPT);
147			else
148			DES_cbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
149			DES_ENCRYPT);
150
151			/* output */
152			outnum=rnum+HDRSIZE;
153
154			for (j=0; j<outnum; j+=i)
155			{
156			/* eay 26/08/92 I was not doing writing from where we
157			* got up to. */
158			i=write(fd,(void *)&(outbuf[j]),outnum-j);
159			if (i == -1)
160			{
161			#ifdef EINTR
162			if (errno == EINTR)
163			i=0;
164			else
165			#endif
166			/* This is really a bad error - very bad
167			* It will stuff-up both ends. */
168			return(-1);
169			}
170			}
171
172			return(len);
173			}