mdw@git.distorted.org.uk Git - distorted-keys/blob - ktype.seccure

   1 ### -*-sh-*-
   2 ###
   3 ### Key type for B. Poettering's `Seccure' suite
   4 ###
   5 ### (c) 2011 Mark Wooding
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the distorted.org.uk key management suite.
  11 ###
  12 ### distorted-keys is free software; you can redistribute it and/or modify
  13 ### it under the terms of the GNU General Public License as published by
  14 ### the Free Software Foundation; either version 2 of the License, or
  15 ### (at your option) any later version.
  16 ###
  17 ### distorted-keys is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ### GNU General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with distorted-keys; if not, write to the Free Software Foundation,
  24 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 ###--------------------------------------------------------------------------
  27 ### Utility functions.
  28
  29 run_seccure () {
  30   op=$1; shift
  31   ## run_seccure OP ARG ...
  32   ##
  33   ## Run a Seccure program, ensuring that its stderr is reported if it had
  34   ## anything very interesting to say, but suppressed if it was boring.
  35
  36   set +e; seccure-$op "$@" 2>$tmp/seccure.out; rc=$?; set -e
  37   grep -v '^WARNING: Cannot obtain memory lock' $tmp/seccure.out >&2 || :
  38   return $rc
  39 }
  40
  41 ###--------------------------------------------------------------------------
  42 ### Key type definition.
  43
  44 defprops k_props <<EOF
  45 curve                   t       $R_LABEL
  46 tagsz                   t       $R_NUMERIC
  47 EOF
  48
  49 : ${kprop_curve=p256}
  50 : ${kprop_tagsz=128}
  51
  52 k_public () {
  53   nub=$2
  54   run_seccure key -q -c$kprop_curve -F"$nub"
  55 }
  56
  57 k_generate () {
  58   base=$1 nub=$2
  59   makenub >"$nub"
  60   k_public "$base" "$nub" >"$base/pub"
  61 }
  62
  63 k_check () {
  64   base=$1 nub=$2
  65   this=$(k_public "$base" "$nub")
  66   orig=$(cat "$base/pub")
  67   case "$orig" in "$this") return 0 ;; *) return 1 ;; esac
  68 }
  69
  70 k_encrypt () {
  71   base=$1
  72   run_seccure encrypt -q -c$kprop_curve -m$kprop_tagsz -F/dev/null -- \
  73     $(cat "$base/pub")
  74 }
  75
  76 k_decrypt () {
  77   nub=$2
  78   if ! run_seccure decrypt -q -c$kprop_curve -m$kprop_tagsz -F"$nub"; then
  79     echo >&2 "$quis: decryption failed"
  80     return 1
  81   fi
  82 }
  83
  84 k_sign () {
  85   nub=$2
  86   sig=$(run_seccure sign -q -c$kprop_curve -F"$nub" -s/dev/stdout)
  87   echo "$sig"
  88 }
  89
  90 k_verify () {
  91   base=$1 sig=$3
  92   if run_seccure verify -q -c$kprop_curve -F/dev/null -- \
  93     $(cat "$base/pub") "$sig"
  94   then :; else
  95     rc=$?
  96     echo >&2 "$quis: signature verification failed"
  97     return $rc
  98   fi
  99 }
 100
 101 ###----- That's all, folks --------------------------------------------------