Example of use:

  curvecpmakekey serverkey

  curvecpprintkey serverkey > serverkey.hex

  curvecpserver this.machine.name serverkey \
    127.0.0.1 10000 31415926535897932384626433832795 \
      curvecpmessage cat /usr/share/dict/words &

  curvecpclient this.machine.name $(cat serverkey.hex) \
    127.0.0.1 10000 31415926535897932384626433832795 \
      curvecpmessage -c sh -c 'shasum5.12 <&6'

  shasum5.12 < /usr/share/dict/words
