libreoffice-gpg: move to office-gpg, add cfg file

[shutils.git] / office-gpg

diff --git a/office-gpg b/office-gpg
new file mode 100755 (executable)
index 0000000..1e97bbc
--- /dev/null
+++ b/office-gpg
@@ -0,0 +1,141 @@
+#!/bin/sh
+# Copyright (c) 2013 Stefan Huber
+#
+# Permission is hereby granted, free of charge, to any person
+# obtaining a copy of this software and associated documentation
+# files (the "Software"), to deal in the Software without
+# restriction, including without limitation the rights to use,
+# copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following
+# conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+
+# Author: Stefan Huber <shuber@sthu.org>
+
+#
+# This script does a decrypt-edit-encrypt cycle with gpg and OpenOffice resp.
+# LibreOffice files.
+
+
+SUMCMD="sha1sum"
+CRYPTID=""
+
+CMD="/usr/bin/libreoffice"
+[ -x ${CMD} ] || CMD="/usr/bin/ooffice"
+
+[ -f "$HOME/.office-gpg.cfg" ] && source "$HOME/.office-gpg.cfg"
+
+if [ -z "$CRYPTID" ]; then
+       echo "No CRYPTID set in $HOME/.office-gpg.cfg"
+       exit 1
+fi
+
+#No valid invocation
+if [ $# -ne 1 ]
+then
+       echo "Usage: $CMD-gpg <gpg-file>"
+       exit -1
+fi
+
+
+#The corresponding gpg-file
+gpgfile=$1
+
+if [ ! -f "$gpgfile" ]
+then
+       echo "\`$gpgfile\` does not exist..."
+else
+       echo "Opening \`$gpgfile\`..."
+fi
+
+
+
+#Search for filename to to encrypt file to...
+uncryptfilePost=${gpgfile%%.gpg}
+i=1
+uncryptfile="$i.$uncryptfilePost"
+
+while [ -f "$uncryptfile" ]
+do
+       let "i = $i + 1"
+       uncryptfile="$i.$uncryptfilePost"
+done
+
+
+echo "Uncrypt \`$gpgfile\` to  \`$uncryptfile\`..."
+
+
+
+#Decrypt file and get checksum...
+gpg  --output "$uncryptfile" --decrypt "$gpgfile"
+hsumpre=`$SUMCMD "$uncryptfile" | awk '{ print $1 }'`
+echo "Checksum is '$hsumpre'."
+
+
+#Edit file and get checksum of altered file
+$CMD "$uncryptfile"
+#pid=`lsof | grep "$uncryptfile" | cut -d ' ' -f 2`
+#echo "wait for pid: $pid"
+#while [ -n "`ps | grep "$pid"`" ] ; do
+#        sleep 1
+#done
+
+
+hsumpost=`$SUMCMD "$uncryptfile" | awk '{ print $1 }'`
+echo "Checksum is '$hsumpost'."
+
+
+#Check if file has been altered
+if [ "$hsumpost" != "$hsumpre" ]
+then
+       gpg --output "$gpgfile" -r "$CRYPTID" --encrypt "$uncryptfile" 
+
+       #Get checksum of crypted version
+       hsumcrypt=`gpg --decrypt $gpgfile | $SUMCMD | awk '{ print $1 }'`
+       echo "Checksum of crypted file is '$hsumcrypt'"
+
+       if [ "$hsumpost" != "$hsumcrypt" ]
+       then
+               echo ""
+               echo "*** WARNING ***"
+               echo "*** WARNING ***   Encrypted file \`$gpgfile\` leads to different checksum."
+               echo "*** WARNING ***   Not removing unencrypted file \`$uncryptfile\`."
+               echo "*** WARNING ***"
+               echo ""
+
+               exit -1
+       fi
+
+else
+       echo "No changes. Skip re-encrypting"
+fi
+
+
+
+
+#Remove old file...
+rm -i "$uncryptfile"
+
+
+#File not removed!?
+if [ -f "$uncryptfile" ]
+then
+       echo ""
+       echo "*** WARNING ***"
+       echo "*** WARNING ***   Unencrypted file \`$uncryptfile\` not removed!"
+       echo "*** WARNING ***"
+       echo ""
+fi
+