#!/bin/bash

# Unsecure implementation of a simple encrypted file editor
# The file is saved IN PLAIN TEXT when editing,
# this script only takes care of storing the file 
# encrypted


if [ ! -f "$1" ]
then
	echo "Give me an encrypted text file"
    exit 1
fi
unc=($(echo "$1" | sed 's/.gpg$//'))
if [ "$1" = "$unc" ]
then 
   echo "source is not .gpg"
   exit 1
fi
if [ -e "$unc" ]
then echo "$unc already exists. exiting"
     exit 1
fi

gpg --decrypt "$1" > "$unc"

edit=`date +%s -r $unc`
if [ -s "$unc" ]
then vim -i NONE -n "$unc"    
else echo Error in decrypting
     rm "$unc"
     exit 1
fi

afteredit=`date +%s -r "$unc"`

if (( $edit != $afteredit )) 
then
	cat "$unc" | gpg -ca > "$1".tmp
    if [ -s "$1".tmp ]
    then mv "$1" "$1".old
         mv "$1".tmp "$1"
    fi
fi
rm "$unc"