Some UNIX shell scripts for using RC5a
	      =====================================

			 Reinhard Wobst
		      wobst@ifw-dresden.de
			  Feb 2, 1996


Here are  some shell scripts  for Bourne- and  Kornshell under UNIX with
which  you  can use my  rc5a program. They  are free, and  no warranty is
implied.

Fcrypt, Fdecrypt:

	encrypt/decrypt one or more  files which are  given as args. The
	password  needs  to  be entered  for  the first  file  only.  On
	encoding, you must enter the  password twice,  on decoding, only
	once. If the decryption password is false, Fdecrypt aborts.

	The password is stored in CRYPTKEY, the plaintext in a temporary
	file of mode 600. Hacker attacks are theoretically possible.

	Fdecrypt is a link to Fcrypt.

Ccrypt, Cdecrypt:

	A number  of files  and  directory trees  are  stored in  a cpio
	archive  which is  then encrypted.  On success,  all  files  and
	directories are then  removed  recursively (besides the  archive
	itself,  of  course).  The  password  entry is  provided by  rc5a
	itself.

	Cdecrypt is a link to Ccrypt.

vix:

	A simple  script to edit  encrypted compressed files. Initially,
	you must generate the file by

	gzip <file | rc5a >tmp_; mv tmp_ file

	The script invokes the editor  vi (or $EDITOR,  if defined) on a
	temporary  file. If the file  is empty when  leaving vi, nothing
	will be changed.

	The password is stored in CRYPTKEY, the plaintext in a temporary
	file of mode 600. Hacker attacks are theoretically possible.