BSD 4_3_Net_2 release

[unix-history] / usr / src / usr.bin / rlogin / des_rw.c

diff --git a/usr/src/usr.bin/rlogin/des_rw.c b/usr/src/usr.bin/rlogin/des_rw.c
index ddddd75..2d7aa56 100644 (file)
--- a/usr/src/usr.bin/rlogin/des_rw.c
+++ b/usr/src/usr.bin/rlogin/des_rw.c
@@ -2,170 +2,36 @@
  * Copyright (c) 1989 The Regents of the University of California.
  * All rights reserved.
  *
  * Copyright (c) 1989 The Regents of the University of California.
  * All rights reserved.
  *

- * Redistribution and use in source and binary forms are permitted
- * provided that: (1) source distributions retain this entire copyright
- * notice and comment, and (2) distributions including binaries display
- * the following acknowledgement:  ``This product includes software
- * developed by the University of California, Berkeley and its contributors''
- * in the documentation or other materials provided with the distribution
- * and in all advertising materials mentioning features or use of this
- * software. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 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 above 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 software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.

  */
 
 #ifndef lint
  */
 
 #ifndef lint

-static char sccsid[] = "@(#)des_rw.c   5.5 (Berkeley) 6/1/90";
+static char sccsid[] = "@(#)des_rw.c   5.7.1.1 (Berkeley) 10/21/90";

 #endif /* not lint */
 
 #endif /* not lint */
 

-#include <sys/param.h>
-#include <kerberosIV/des.h>
-#include <kerberosIV/krb.h>
-
-extern long            random();
-static unsigned char   des_inbuf[10240], storage[10240], *store_ptr;
-static bit_64          *key;
-static u_char          *key_schedule;
-
-/*
- * NB: These routines will not function properly if NBIO
- *     is set
- */
-
-/*
- * des_set_key
- *
- * Set des encryption/decryption key for use by the des_read and
- * des_write routines
- *
- * The inkey parameter is actually the DES initial vector,
- * and the insched is the DES Key unwrapped for faster decryption
- */
-
-void
-des_set_key(inkey, insched)
-       bit_64          *inkey;
-       u_char          *insched;
-{
-       key = inkey;
-       key_schedule = insched;
-}
-
-void
-des_clear_key()
-{
-       bzero((char *) key, sizeof(C_Block));
-       bzero((char *) key_schedule, sizeof(Key_schedule));
-}
-       
-
-int
-des_read(fd, buf, len)
-       int fd;
-       register char *buf;
-       int len;
-{
-       int nreturned = 0;
-       long net_len, rd_len;
-       int nstored = 0;
-
-       if (nstored >= len) {
-               (void) bcopy(store_ptr, buf, len);
-               store_ptr += len;
-               nstored -= len;
-               return(len);
-       } else if (nstored) {
-               (void) bcopy(store_ptr, buf, nstored);
-               nreturned += nstored;
-               buf += nstored;
-               len -= nstored;
-               nstored = 0;
-       }
-       
-       if (krb_net_read(fd, &net_len, sizeof(net_len)) != sizeof(net_len)) {
-               /* XXX can't read enough, pipe
-                  must have closed */
-               return(0);
-       }
-       net_len = ntohl(net_len);
-       if (net_len <= 0 || net_len > sizeof(des_inbuf)) {
-               /* preposterous length; assume out-of-sync; only
-                  recourse is to close connection, so return 0 */
-               return(0);
-       }
-       /* the writer tells us how much real data we are getting, but
-          we need to read the pad bytes (8-byte boundary) */
-       rd_len = roundup(net_len, 8);
-       if (krb_net_read(fd, des_inbuf, rd_len) != rd_len) {
-               /* pipe must have closed, return 0 */
-               return(0);
-       }
-       (void) des_pcbc_encrypt(des_inbuf,      /* inbuf */
-                           storage,            /* outbuf */
-                           net_len,            /* length */
-                           key_schedule,       /* DES key */
-                           key,                /* IV */
-                           DECRYPT);           /* direction */
-
-       if(net_len < 8)
-               store_ptr = storage + 8 - net_len;
-       else
-               store_ptr = storage;
-
-       nstored = net_len;
-       if (nstored > len) {
-               (void) bcopy(store_ptr, buf, len);
-               nreturned += len;
-               store_ptr += len;
-               nstored -= len;
-       } else {
-               (void) bcopy(store_ptr, buf, nstored);
-               nreturned += nstored;
-               nstored = 0;
-       }
-       
-       return(nreturned);
-}
-
-static unsigned char des_outbuf[10240];        /* > longest write */
-
-int
-des_write(fd, buf, len)
-       int fd;
-       char *buf;
-       int len;
-{
-       static  int     seeded = 0;
-       static  char    garbage_buf[8];
-       long net_len, garbage;
-
-       if(len < 8) {
-               if(!seeded) {
-                       seeded = 1;
-                       srandom((int) time((long *)0));
-               }
-               garbage = random();
-               /* insert random garbage */
-               (void) bcopy(&garbage, garbage_buf, MIN(sizeof(long),8));
-               /* this "right-justifies" the data in the buffer */
-               (void) bcopy(buf, garbage_buf + 8 - len, len);
-       }
-       /* pcbc_encrypt outputs in 8-byte (64 bit) increments */
-
-       (void) des_pcbc_encrypt((len < 8) ? garbage_buf : buf,
-                           des_outbuf,
-                           (len < 8) ? 8 : len,
-                           key_schedule,       /* DES key */
-                           key,                /* IV */
-                           ENCRYPT);
-
-       /* tell the other end the real amount, but send an 8-byte padded
-          packet */
-       net_len = htonl(len);
-       (void) write(fd, &net_len, sizeof(net_len));
-       (void) write(fd, des_outbuf, roundup(len,8));
-       return(len);
-}