#! /bin/sh
###
### Collect the value of a newly created keeper nub
###
### (c) 2012 Mark Wooding
###

###----- Licensing notice ---------------------------------------------------
###
### This file is part of the distorted.org.uk key management suite.
###
### distorted-keys is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
###
### distorted-keys is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with distorted-keys; if not, write to the Free Software Foundation,
### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

set -e
case "${KEYSLIB+t}" in t) ;; *) echo >&2 "$0: KEYSLIB unset"; exit 1 ;; esac
. "$KEYSLIB"/keyfunc.sh

defhelp <<HELP
KEEPER I
Write the nub for private key I of the keeper set KEEPER to standard output.

The nub is read from the safe but temporary place where \`keys new-keeper'
left them.
HELP

## Parse the command line.
case $# in 2) ;; *) usage_err ;; esac
keeper=$1 index=$2
checkword "keeper label" "$keeper"
checknumber "index" "$index"

## Find out about the set.
if [ ! -f $KEYS/keeper/$keeper/meta ]; then
  echo >&2 "$quis: unknown keeper set \`$keeper'"
  exit 1
fi
read n hunoz <$KEYS/keeper/$keeper/meta

if [ $index -ge $n ]; then
  echo >&2 "$quis: index $index out of range (must be less than $n)"
  exit 1
fi

## Check that nubs are available for the keeper set.
reqsafe
if [ ! -d $SAFE/keys.keeper/$keeper/ ]; then
  echo >&2 "$quis: no nubs available for keeper set \`$keeper'"
  exit 1
fi

## Done.
cat $SAFE/keys.keeper/$keeper/$index

###----- That's all, folks --------------------------------------------------