#! /bin/sh
###
### Construct a new set of keeper keys
###
### (c) 2011 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
[-f] [-p PROFILE] KEEPER N [OPTION=VALUE ...]
Create a new set of keeper keys.

The key nubs are stored in a safe but temporary place where they can be
extracted using \`keys keeper-nub'.
HELP

## Parse the command line.
force=nil
profile=${keeper_profile-keeper}
while getopts "fp:" opt; do
  case "$opt" in
    f) force=t ;;
    p) profile=$OPTARG ;;
    *) usage_err ;;
  esac
done
shift $(( $OPTIND - 1 ))
case $# in 0 | 1) usage_err ;; esac
keeper=$1 n=$2; shift 2
checkword "keeper set label" "$keeper"
checknumber "set size" "$n"
checkword "profile label" "$profile"

## Preflight checking.
reqsafe
case $force in
  nil)
    if [ -e $KEYS/keeper/$keeper ]; then
      echo >&2 "$quis: keeper set \`$keeper' already exists"
      exit 1
    fi
    if [ -e $SAFE/keys.keeper/$keeper ]; then
      echo >&2 "$quis: destination \`$keeper' already exists"
      exit 1
    fi
    ;;
  t)
    rm -rf $KEYS/keeper/$keeper
    rm -rf $SAFE/keys.keeper/$keeper/
    ;;
esac

## Generate the private keys, one per file, and compute the public keys.
mktmp
mkdir -m700 -p $SAFE/keys.keeper/
cd $SAFE/keys.keeper/
rm -rf $keeper.new
mkdir -m700 $keeper.new
mkdir -p -m755 $KEYS/keeper/$keeper.new
echo $n >$KEYS/keeper/$keeper.new/meta
i=0
while [ $i -lt $n ]; do
  c_gensyskey $profile \
    $KEYS/keeper/$keeper.new/$i \
    $keeper.new/$i \
    keeper="$keeper" seq="$i" tot="$n" "$@"
  i=$(( $i + 1 ))
done
mv $keeper.new $keeper
mv $KEYS/keeper/$keeper.new $KEYS/keeper/$keeper

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