From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 11 Nov 1995 10:44:56 -0500
From: G. David Butler gdb@dbSystems.com
Subject: /sys/src/libc/port/crypt.c
Topicbox-Message-UUID: 33c0dbe6-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19951111154456.NSQCAVAz5JS7ngKOi0yUnegTWLAimv9zi4GnZ99h3Bc@z>

Because of export restrictions, I assume, the source to the encrypt()
and decrypt() functions (/sys/src/libc/port/crypt.c) are not on the CD-ROM.

I have used the code base that Pace Willisson <pace@blitz.com> made
available for authenication on UNIX to recreate crypt.c.

Even though I was more careful using unsigned declarations throughout
the code, I am concerned about character size problems.  From what I
can tell, the caller of encrypt/decrypt will handle the conversion of
whatever to blocks of bytes for encryption, but is this sufficient?

An added bonus is general purpose encryption in libc.a.  This
provides functionality to enable fast encrypted data streams.  My idea
is to encrypt all data on the wire.  Am I being unreasonable?

For a sanity check, are there any restrictions for routines in libc.a?

One last question, is it possible to get the original code from Bell Labs
if you are a US citizen?

Thanks for your attention.

David Butler
gdb@dbSystems.com