readme.linux

des算法实现源码

I've copied this file directly from the original README.linux.  Hopefully,
linux is now POSIX compliant.  If not, please let me know, and in the meantime,
try compiling with "CFLAGS=-D__BSD -D_LINUX_SOURCE", and tell me what flags CPP
automatically #defines so that I can change getkey.c to work by default.

See the README file for comments about why I don't reccomend calling the
executable "des" and new changes.

Dave Barrett<[e-mail]>

-----

Hmm, amazing how portable good code is. The only requirements were a couple
of DEFINEs in the Makefile and a change to use <bsd/sgtty.h> plus a newline
fix in getkey.c. Otherwise it's the same source as from comp.sources.misc.

to compile:

    make

to install, check the paths in the Makefile and type:

    make install

Then you have a very nice usable des. Ive been using the package for years on
a wide variety of systems with no problems at all. Hope you get the same
milage. I prefer to call my binary 'des' as opposed to 'cipher'.

I find the best and safest usage is to:

    des    < infile   > outfile.d    to encrypt
    des -d < infile.d > outfile      to decrypt

Otherwise your messing around with command line arguements that might disclose
information to someone trying to examine the files your encrypting.

Happy encrypting.
Mark
[e-mail]