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 %

Line Branch Exec Source
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/* $OpenBSD: enc_writ.c,v 1.14 2015/02/12 03:54:07 jsing Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.]
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 */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <openssl/opensslconf.h>
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#include "des_locl.h"
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/*
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 * WARNINGS:
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 *
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 *  -  The data format used by DES_enc_write() and DES_enc_read()
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 *     has a cryptographic weakness: When asked to write more
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 *     than MAXWRITE bytes, DES_enc_write will split the data
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 *     into several chunks that are all encrypted
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 *     using the same IV.  So don't use these functions unless you
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 *     are sure you know what you do (in which case you might
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 *     not want to use them anyway).
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 *
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 *  -  This code cannot handle non-blocking sockets.
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 */
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int DES_enc_write(int fd, const void *_buf, int len,
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		  DES_key_schedule *sched, DES_cblock *iv)
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	{
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#ifdef _LIBC
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	extern unsigned long time();
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	extern int write();
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#endif
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	const unsigned char *buf=_buf;
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	long rnum;
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	int i,j,k,outnum;
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	static unsigned char *outbuf=NULL;
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	unsigned char shortbuf[8];
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	unsigned char *p;
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	const unsigned char *cp;
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	static int start=1;
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	if (outbuf == NULL)
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		{
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		outbuf=malloc(BSIZE+HDRSIZE);
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		if (outbuf == NULL) return(-1);
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		}
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	/* If we are sending less than 8 bytes, the same char will look
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	 * the same if we don't pad it out with random bytes */
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	if (start)
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		{
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		start=0;
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		}
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	/* lets recurse if we want to send the data in small chunks */
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	if (len > MAXWRITE)
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		{
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		j=0;
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		for (i=0; i<len; i+=k)
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			{
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			k=DES_enc_write(fd,&(buf[i]),
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				((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv);
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			if (k < 0)
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				return(k);
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			else
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				j+=k;
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			}
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		return(j);
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		}
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	/* write length first */
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	p=outbuf;
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	l2n(len,p);
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	/* pad short strings */
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	if (len < 8)
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		{
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		cp=shortbuf;
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		memcpy(shortbuf,buf,len);
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		arc4random_buf(shortbuf+len, 8-len);
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		rnum=8;
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		}
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	else
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		{
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		cp=buf;
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		rnum=((len+7)/8*8); /* round up to nearest eight */
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		}
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	if (DES_rw_mode & DES_PCBC_MODE)
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		DES_pcbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
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				 DES_ENCRYPT);
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	else
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		DES_cbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv,
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				DES_ENCRYPT);
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	/* output */
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	outnum=rnum+HDRSIZE;
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	for (j=0; j<outnum; j+=i)
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		{
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		/* eay 26/08/92 I was not doing writing from where we
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		 * got up to. */
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		i=write(fd,(void *)&(outbuf[j]),outnum-j);
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		if (i == -1)
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			{
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#ifdef EINTR
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			if (errno == EINTR)
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				i=0;
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			else
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#endif
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			        /* This is really a bad error - very bad
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				 * It will stuff-up both ends. */
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				return(-1);
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			}
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		}
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	return(len);
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	}