NaCl(1)                     General Commands Manual                    NaCl(1)

       CurveCP — Message-handling programs

       curvecpmessage [-q (optional)]  [-Q (optional)]  [-v (optional)]  [-c
       (optional)]  [-C (optional)]  [-s (optional)]  [prog]

       This manual page documents briefly the CurveCP commands.

       A traditional UNIX-style server such as ftpd handles just one network
       connection, reading input from stdin and writing output to stdout. A
       "superserver" such as inetd or tcpserver listens for network
       connections and starts a separate server process for each connection.

       The CurveCP command-line tools have an extra level of modularity. The
       curvecpserver  superserver listens for network connections. For each
       connection, curvecpserver starts the curvecpmessage message handler;
       curvecpmessage then starts a server such as ftpd.  Then ftpd sends a
       stream of data to curvecpmessage, which in turn sends messages to
       curvecpserver, which encrypts and authenticates the messages and sends
       them inside network packets. At the same time curvecpclient receives
       network packets, verifies and decrypts messages inside the packets, and
       passes the messages to curvecpmessage; curvecpmessage sends a stream of
       data to ftpd.  The same curvecpmessage tool is also used by

       curvecpserver and curvecpclient can use programs other than
       curvecpmessage. Those programs can directly generate messages in the
       CurveCP message format without talking to separate tools such as ftpd;
       or they can support a completely different protocol that reuses
       CurveCP's cryptographic layer but transmits different kinds of

       How to use curvecpmessage:

       -q           optional
                 no error messages

       -Q           optional
                 print error messages (default)

       -v           optional
                 print extra information

       -c           optional
                 program is a client; server starts first

       -C           optional
                 program is a client that starts first

       -s           optional
                 program is a server (default)

       prog      run this server

       curvecpserver (1), curvecpclient (1), inetd (8), tcpserver (1).

       This manual page was written by Sergiusz Pawlowicz for the Debian system (and may be used by
       others). The source of this page is a webpage .  Permission is granted to copy,
       distribute and/or modify this document under public domain.

       This manual page was rewritten for the Debian distribution because the
       original program does not have a manual page.