Multiple key types, key profiles, and user key storage.

[distorted-keys] / cryptop.recover

diff --git a/cryptop.recover b/cryptop.recover
new file mode 100644 (file)
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--- /dev/null
+++ b/cryptop.recover
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+#! /bin/sh
+###
+### Recover a user key nub
+###
+### (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
+KEY RECOV
+Recover the named user KEY using a blob protected using the recovery key
+RECOV; it is an error if RECOV is not currently revealed.
+HELP
+
+case $# in 2) ;; *) usage_err ;; esac
+key=$1 recov=$2
+parse_keylabel "$key"
+if [ ! -d $kdir ]; then echo >&2 "$quis: unknown key \`$key'"; exit 1; fi
+checkword "recovery key label" "$recov"
+
+mktmp
+nubid=$(cat $kdir/nubid)
+readmeta $kdir
+read_profile "$profile"
+if [ -f $knub ]; then
+  nubbin=$(nubid <$knub)
+  case "$nubbin" in
+    "$nubid")
+      echo >&2 "$quis: key \`$key' doesn't need recovery"
+      exit 1
+      ;;
+  esac
+fi
+
+umask 077
+recover $recov $kowner/$klabel >$knub.new
+nubbin=$(nubid <$knub.new)
+case "$nubbin" in
+  "$nubid") ;;
+  *)
+    echo >&2 "$quis: recovery produced incorrect nub"
+    exit 1
+    ;;
+esac
+mv $knub.new $knub
+
+###----- That's all, folks --------------------------------------------------