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DESDOS.ARJ
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1990-08-29
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Late breaking news:
Versions of uuencode and uudecode now included, which are helpful
for using this package to send/receive encrypted mail.
Phil asked me to clean this up slightly and package it for distribution.
I've got it running on my Symmetric 4.2bsd system, Phil reports it runs fine
on a variety of systems at Bellcore. Note that getopt is required but not
provided, as there is already a getopt package in the mod.sources archives.
Bdale Garbee, N3EUA 870401
winfree!bdale aka bdale%winfree.uucp@flash.bellcore.com
- - - - -
This package contains a DES subroutine library based on the original public
domain code by James Gillogly, but made faster and more flexible. Commands
using this library have been added for testing and for encrypting and
decrypting files (compatible with the DES command under Sun UNIX), among
other things.
Run make. That will compile everything and run test data (from the NBS
certification suite) through it. It runs as-is under UNIX. It will run
under MS-DOS with a few minor changes: make sure you define LITTLE_ENDIAN
when compiling des.c, and change the name of the console in getpass.c
[see note below]. If you have the byte order flag set wrong, you will
get ENCRYPT FAIL messages when the descert test is run.
radlogin.c is an experimental program for secure UNIX login via insecure
channels (like amateur packet radio). Make it and set it up as the login
shell for a special, password-free login (e.g., "radio"). When it starts the
user will be asked his REAL login name, which is then looked up in
/etc/rkeys. (This file must be read protected since it contains DES keys).
The time of day is then printed in hex as a challenge. The user must encrypt
it using DES and his key and type the answer back. The user may use the
program "descalc" to perform his local calculation. All this is very clumsy;
it works, but after all it's only experimental.
Phil Karn, KA9Q
bellcore!karn aka karn@flash.bellcore.com
- - - - -
Subject: Re: rkeys file
rkeys:
karn 0123456789abcdef
uid des_key_in_hex
- - - - -
=============================================================================
Note on the MS-DOS port: contrary to what is indicated above, these
sources required substantial hacking before they would compile under
MS-DOS with MS C 5.1; in particular, the strategy in getpass.c had to be
completely changed, stdio had to be switched to binary mode, and various
minor adjustments had to be made. All these changes are #ifdef MSDOS, so
the original code is still available for UNIX. I've also provided a
makefile.dos which makes the MS-DOS version.
Also, again contrary to what is indicated above, getopt *is* provided.
richard reiner
rreiner@nexus.yorku.ca
28 aug 90