Distribute key fragments during remote backup

src/freedombone

@@ -3776,6 +3776,7 @@ function backup_to_friends_servers {
   # we just need to rsync it to each friend
 
   echo '# For each remote server' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo 'ctr=0' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo 'while read remote_server' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo 'do' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '  # Get the server and its password' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
@@ -3800,6 +3801,26 @@ function backup_to_friends_servers {
   echo -n '    echo "$NOW Starting backup to $REMOTE_SERVER" >> ' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo "$REMOTE_BACKUPS_LOG" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
 
+  echo "    if [ -d /home/$MY_USERNAME/.gnupg_fragments ]; then" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo "        cd /home/$MY_USERNAME/.gnupg_fragments" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '        no_of_fragments=$(ls -afq | wc -l)' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '        no_of_fragments=$((no_of_fragments - 2))' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '        if [[ ${no_of_fragments} > 0 ]]; then' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '            key_files=(/home/$MY_USERNAME/.gnupg_fragments/data*)' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '            key_filename=${key_files[ctr]}' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo "            mkdir -p /home/$MY_USERNAME/tempkey/.gnupg_fragments" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo "            cp $key_filename /home/$MY_USERNAME/tempkey/.gnupg_fragments" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo -n '            /usr/bin/sshpass -p $REMOTE_PASSWORD ' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo "scp -r -P $REMOTE_SSH_PORT /home/$MY_USERNAME/tempkey/.gnupg_fragments $REMOTE_SERVER" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo "            shred -zu /home/$MY_USERNAME/tempkey/.gnupg_fragments/*" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo "            rm -rf /home/$MY_USERNAME/tempkey" >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '            ctr=$((ctr + 1))' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '            if [[ ${ctr} >= ${no_of_fragments} ]]; then' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '                ctr=0' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '            fi' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '        fi' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+  echo '    fi' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
+
   echo -n '    rsync -ratlzv --rsh="/usr/bin/sshpass -p $REMOTE_PASSWORD ssh -p $REMOTE_SSH_PORT -o StrictHostKeyChecking=no" ' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '$SERVER_DIRECTORY/backup $REMOTE_SERVER' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME
   echo '    if [ ! "$?" = "0" ]; then' >> /usr/bin/$BACKUP_TO_FRIENDS_SCRIPT_NAME