me@there>perl -V:.*?crypt.*?
crypt_r_proto='0';
cryptlib='';
d_crypt='define';
d_crypt_r='undef';
i_crypt='undef';
[download]

man crypt says,

 
NAME
     enigma, crypt -- very simple file encryption

SYNOPSIS
     enigma [-s] [-k] [password]
     crypt [-s] [-k] [password]

DESCRIPTION
     The enigma utility, also known as crypt is a very simple encrypti
+on pro-
     gram, working on a ``secret-key'' basis.  It operates as a filter
+, i.e.,
     it encrypts or decrypts a stream of data from standard input, and
+ writes
     the result to standard output.  Since its operation is fully symm
+etrical,
     feeding the encrypted data stream again through the engine (using
+ the
     same secret key) will decrypt it.
[..yadda yadda..]
[download]

Which is strange, and goes against what I just stated about blowfish.

Also, if you're interested:

 
me@there>uname -a
FreeBSD there.example.com 5.4-STABLE FreeBSD 5.4-STABLE #0: Thu Aug 25
+ 08:24:24 GMT 2005     root@there.example.com:/usr/obj/usr/src/sys/PE
+2850  i386
[download]