105186eeee
(Including all changes for FreeBSD - importing the original eBones distribution would be too complex at this stage, since I don't have access to Piero's CVS.) (If you want to include eBones in your system, don't forget to include MAKE_EBONES in /etc/make.conf.) (This stuff is now also suppable from braae.ru.ac.za.) Bones originally from MIT SIPB. Original port to FreeBSD 1.x by Piero Serini. Moved to FreeBSD 2.0 by Doug Rabson and Geoff Rehmet. Nice bug fixes from Doug Rabson.
95 lines
1.7 KiB
C
95 lines
1.7 KiB
C
/* enc_writ.c */
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/* Copyright (C) 1993 Eric Young - see README for more details */
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/*-
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* $Id: enc_writ.c,v 1.2 1994/07/19 19:21:56 g89r4222 Exp $
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*/
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#include <errno.h>
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#include "des_locl.h"
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int des_enc_write(fd,buf,len,sched,iv)
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int fd;
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char *buf;
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int len;
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des_key_schedule sched;
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des_cblock *iv;
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{
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long rnum;
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int i,j,k,outnum;
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char outbuf[BSIZE+HDRSIZE];
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char shortbuf[8];
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char *p;
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static int start=1;
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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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srandom(time(NULL));
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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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p=shortbuf;
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bcopy(buf,shortbuf,len);
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for (i=len; i<8; i++)
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shortbuf[i]=random();
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rnum=8;
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}
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else
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{
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p=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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pcbc_encrypt((des_cblock *)p,(des_cblock *)&(outbuf[HDRSIZE]),
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(long)((len<8)?8:len),sched,iv,DES_ENCRYPT);
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else
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cbc_encrypt((des_cblock *)p,(des_cblock *)&(outbuf[HDRSIZE]),
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(long)((len<8)?8:len),sched,iv,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 upto. */
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i=write(fd,&(outbuf[j]),(int)(outnum-j));
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if (i == -1)
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{
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if (errno == EINTR)
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i=0;
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else /* 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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}
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