respond-agent stays unlocked in memory to allow multiple challenges

!!! DO NOT SUSPEND/HIBERNATE WHILE OPEN !!!


- ratbox-respond -
------------------
ratbox-respond takes the challenge from the server and creates a valid 
response to pass back to the server.

ratbox-respond will run either interactively, or can have input piped to it
through stdin.

- Compiling -
-------------
Run:
	./configure
	make

This will generate a 'ratbox-respond' binary, which you may place wherever
you like. If configure does not detect your openssl installation, you may
pass it the directory where it is installed to via --enable-openssl, this
should be the base directory which has lib/ and include/openssl/ within it:
	./configure --enable-openssl=/path/to/opensslbase


- ratbox-respond usage -
------------------------
ratbox-respond takes only one argument, the path to your private key:
	./ratbox-respond /path/to/private.key


- Interactive mode -
--------------------
ratbox-respond runs in interactive mode when it detects theres a tty
attached (eg, you run ./ratbox-respond from a normal shell).  This will
prompt for keyphrases and the challenge, and will generate the output to be
given to ircd.


- Non-interactive mode -
------------------------
To allow for ratbox-respond to be called from a script, input may be piped
to ratbox-respond through stdin.  The format of the input is:
	keyphrase\nchallenge\n

If there is no keyphrase, the \n preceding the challenge from ircd must
still be sent.  Output will be given on stdout, and will be just the
response needed to be sent back to ircd.

It is required that input is piped for security reasons, as allowing the
keyphrase to appear in ps is insecure.

An example to illustrate this is:
	echo "keyphrase\nchallenge" | /path/to/ratbox-respond /path/to/key
Though this is equally insecure, as the echo will appear in process lists.
It can be done better in perl for example, by using the open2() function,
see client-scripts/challenge-xchat.pl for an implementation.

-- 
- $Id: README 21696 2006-01-14 22:30:32Z leeh $ -