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一个使用des加密传输的unix下的login程序的服务器端和客户端

This package provides a network login service with more secure authentication
than telnet or rlogin.  Also, all data transmitted to and from the remote
host in encrypted using the DES.  Thus, this package allows you to use a 
remote host across untrusted networks without fear of network snooping.

The package creates two executables: a daemon which runs on the host you wish
to login to, and a client which runs on the host(s) you wish to login from.

To install, just follow the instructions in the Makefile.

To use, read the man pages for deslogin.1 and deslogind.1.  They provide 
many helpful hints and security tips.  The cipher program is included here
from my previous cipher distribution.

Dave Barrett
[e-mail]

deslogind tested on the following machines:
   UNICOS 8.0.2.1A  CRAY Y-MP   - under construction
   SunOS  5.3       sun4m sparc	- under construction (contact me if it works!)
   SunOS  5.4       sun4d sparc - tested as non-root user by barrett 25-Jan-95
   Dynix  3.2.0    sequent i386 - tested as non-root user by skrenta 25-Jan-95
   AIX    2 3       RS/6000     - client only [e-mail]
   IRIX   4.0.5MM   IP12 	- client OK; server can't get pty.
   IRIX   4.0.5     IP7		- same as IRIX?
   dgux   5.4R2.01  mc88100	- works, except tty modes incorrect
   Linux  1.0.9 #2  i486	- fully functional as of version 1.1
   Linux  1.1.11 #2 i486	- fully functional as of version 1.2
   HP-UX  B.09.00 B 9000/370	- fully functional except -w option
   OSF1   V2.0 240  alpha	- fully functional
   SunOS  4.1.1 1   sun4c	- fully functional
   ULTRIX 4.3 1     RISC  	- works, but /dev/tty inaccessable
   ULTRIX 4.2 0     RISC	- works, but /dev/tty inaccessable
				- ctrl-z aborts session.

Release 1.0 April 1994.

Release 1.1 14-June 1994:
   Added RHOSTNAME environment variable.
   Added -w option.
   Ported code to linux.  Now compiles with no changes.
   Incorporated the bug-fix patch for 1.0.
   Added logging to wtmp for correct login history.
   Minor fixes to clean up warnings with gcc -ansi -pedantic -Wall.

Release 1.2:
   Never happened.  Many fixes distributed over several months by 
   email to people who asked.
   I Was waiting for Solaris and SGI port which never happened.

Release 1.30 25-Jan-95:	 (alpha release only, never distributed via ftp)
   Added WRITE_RETRY_TIME to txfr.c
   Ported deslogind to SunOS 5.4
   Ported to Sequent Dynix i386
   Ported client and server to AIX 3.2.5 RS/6000

Release 1.32 03-Mar-95:
   Completely rewrote utmp.c and utmp.h to repair 
      various utmp problems (especially SOLARIS <utmpx.h>) (added -DUTMPX)
      This also fixed utmp problems with linux as well.  (tested 2-Mar-95)

DEC MIPS Ultrix Note:
   I think the problem may be related to POSIX/BSD implementation
   on the DEC MIPS machine.  The parent process had acquired
   the fd as a controlling terminal even though O_NOCTY was 
   specified.   The tcsetpgrp call returned success, but I'm not
   sure I believe it.  If anyone knows about controlling terminal
   stuff on the MIPS, please contact me.  I have comments in deslogind.c
   and tty.c on what I attempted.

Hewlett-Packard HP-UX Note:
   The wrapper option (-w) will not work with HP-UX yet.  
   The login program refuses to be run unless from a root shell; 
   I'm still working on it for the next release.

Solaris Notes:
   Solaris was a mess.  Had to add streams modules and hack like crazy
   on utmp.c.  deslogind now modifies utmp records correctly!  If you
   have problems with utmpx records, remove the -DUTMPX from CCFLAGS,
   athough this was stated as working by <[e-mail]>.  Independently
   of -DUTMPX, I've been told that the "idle time" shows up negative.

IRIX (SGI) Notes:
   I have been unable to obtain documentation on how to acquire a 
   controlling terminal reliably in a machine-independent way using 
   the AT&T streams modules.  Specifically, I don't have the documentation
   for the "ptem" or "ldterm" and "ttycompat" streams modules.  If you 
   know how to do this, please contact me.