#!/bin/bash
PASSFILE='/home/valio/passes/passes'

function genpasswd () {
USER=$1
PASS=$2
DESC=$3
PASSWRDINT=`echo $PASS | openssl enc -aes-256-cbc -a -salt -pass pass:$SALT`
echo "$USER:$PASSWRDINT:$DESC" >> $PASSFILE
return 1
}

function getpasswd () {
PASS=`grep -i $1 $PASSFILE | cut -d':' -f2`
echo -n "User: "; echo `grep -i $1 $PASSFILE | cut -d':' -f1`
echo -n "Password: "; echo $PASS | openssl enc -aes-256-cbc -a -d -salt -pass pass:$SALT
echo "Description: " `grep -i $1 $PASSFILE | cut -d':' -f3`
}

function listpasswd () {
{ echo "Available users:"
while IFS=':' read user pass desc
do
echo "$user / $desc"
done } < $PASSFILE
}

function usage () {
echo "Usage:
-p | --genpasswd - Generate password for the user. It takes 3 arguements. Example: passes -p <USER> <PASSWORD> <DESCRIPTION>
-g | --getpasswd - Get decrypted password for the user. Example: passes -g <DESC>
-l | --list - List available users and their descriptions
"
}
if [ "$1" == "-h" ]
then
        usage
elif [ $1 == "-l" ]
then
	listpasswd
else
        read -s -p "Passphrase: " SALT
fi

while [ "$1" != "" ];do
	case $1 in
		-p | --genpasswd )	shift
					genpasswd $1 $2 $3
					;;
		-g | --getpasswd )	shift
					getpasswd $1
					;;
		-l | --list )		shift
					listpasswd
					;;

		-h | --help )		usage
					exit
					;;
		"" )			usage
					exit
					;;
	esac
	shift
done