#!/bin/bash

function testFile(){
if [ ! -r $1 ] ; then
echo "file $1 isn't readable..."
exit 2
fi
}



echo "This is a script witch perform a dictionnary attac on crypted"
echo "it uses the following tools:"
echo

ccrypt --version
echo

if [ -z $2 ] ; then

echo "usage: $0 dictionnaryFile cipherText"
echo " you may use absolute pathname, current pathname is:"
echo " "`pwd`
exit 1;

fi

################################################################################

# verify if files exist
testFile $1
testFile $2

tmp1file=".$1.tmp1.words"
tmp2file=".$1.tmp2.words"

echo "create $tmp1file and $tmp2file as tempory files"
echo

#for next step, word separators may be \n and not space as human do
sed -e 'y/\t /\n\n/' $1 > $tmp1file

#useless to test a word twice
sort -u $tmp1file > $tmp2file


################################################################################

echo "please wait while trying the dictionnary.."
echo

i=0;

while read lineWitchIsAWord
do
ccrypt --tmpfiles -d --key $lineWitchIsAWord $2 &> /dev/null

if [ $? -eq 0 ];then
rm -v $tmp1file $tmp2file
echo

echo "found ! ($i before), cypher is now removed"
echo $lineWitchIsAWord

exit 0;
fi

i=$(($i+1))
done < $tmp2file

rm -v $tmp1file $tmp2file
echo

echo "not found, sorry"
exit 1