# W0PR wargame

# curl --silent --output wargame.html http://w0pr.net
# sed -n 's/.*<script>\(.*\)<\/script>.*/\1/p' wargame.html > source.js
# cat dehieroglyphy
#!/bin/bash

ifile="$1"
ofile="$ifile.decoded"

cp $ifile $ofile

function escape(){
        echo $* | sed -e "s/\[/\\\[/g" -e "s/\]/\\\]/g" -e "s/ /\\\ /g"
}

number_0='+[]'
number_1='+!![]'
number_2='!+[]+!![]'
number_3='!+[]+!![]+!![]'
number_4='!+[]+!![]+!![]+!![]'
number_5='!+[]+!![]+!![]+!![]+!![]'
number_6='!+[]+!![]+!![]+!![]+!![]+!![]'
number_7='!+[]+!![]+!![]+!![]+!![]+!![]+!![]'
number_8='!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]'
number_9='!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+!![]'

character_0="($number_0+[])"
character_1="($number_1+[])"
character_2="($number_2+[])"
character_3="($number_3+[])"
character_4="($number_4+[])"
character_5="($number_5+[])"
character_6="($number_6+[])"
character_7="($number_7+[])"
character_8="($number_8+[])"
character_9="($number_9+[])"

_object_Object='[]+{}'
_NaN='+{}+[]'
_true='!![]+[]'
_false='![]+[]'
_undefined='[][[]]+[]'

character_blank="($_object_Object)[$number_7]"
character_leftsquarebracket="($_object_Object)[$number_0]"
character_rightsquarebracket="($_object_Object)[$character_1+$character_4]"
character_a="($_NaN)[$number_1]"
character_b="($_object_Object)[$number_2]"
character_c="($_object_Object)[$number_5]"
character_d="($_undefined)[$number_2]"
character_e="($_undefined)[$number_3]"
character_f="($_undefined)[$number_4]"
character_i="($_undefined)[$number_5]"
character_j="($_object_Object)[$number_3]"
character_l="($_false)[$number_2]"
character_n="($_undefined)[$number_1]"
character_o="($_object_Object)[$number_1]"
character_r="($_true)[$number_1]"
character_s="($_false)[$number_3]"
character_t="($_true)[$number_0]"
character_u="($_undefined)[$number_0]"
character_N="($_NaN)[$number_0]"
character_O="($_object_Object)[$number_8]"

_Infinity="+($number_1+$character_e+$character_1+$character_0+$character_0+$character_0)+[]"

character_y="($_Infinity)[$number_7]"
character_I="($_Infinity)[$number_0]"

_1e100="+($number_1+$character_e+$character_1+$character_0+$character_0)+[]"
character_plus="($_1e100)[$number_2]"

sed -i "s/`escape $character_plus`/+/g" $ofile
sed -i "s/`escape $character_I`/I/g" $ofile
sed -i "s/`escape $character_y`/y/g" $ofile
sed -i "s/`escape $character_O`/O/g" $ofile
sed -i "s/`escape $character_N`/N/g" $ofile
sed -i "s/`escape $character_u`/u/g" $ofile
sed -i "s/`escape $character_t`/t/g" $ofile
sed -i "s/`escape $character_s`/s/g" $ofile
sed -i "s/`escape $character_r`/r/g" $ofile
sed -i "s/`escape $character_o`/o/g" $ofile
sed -i "s/`escape $character_n`/n/g" $ofile
sed -i "s/`escape $character_l`/l/g" $ofile
sed -i "s/`escape $character_j`/j/g" $ofile
sed -i "s/`escape $character_i`/i/g" $ofile
sed -i "s/`escape $character_f`/f/g" $ofile
sed -i "s/`escape $character_e`/e/g" $ofile
sed -i "s/`escape $character_d`/d/g" $ofile
sed -i "s/`escape $character_c`/c/g" $ofile
sed -i "s/`escape $character_b`/b/g" $ofile
sed -i "s/`escape $character_a`/a/g" $ofile
sed -i "s/`escape $character_rightsquarebracket`/]/g" $ofile
sed -i "s/`escape $character_leftsquarebracket`/[/g" $ofile
sed -i "s/`escape $character_blank`/ /g" $ofile
sed -i "s/`escape $character_9`/9/g" $ofile
sed -i "s/`escape $character_8`/8/g" $ofile
sed -i "s/`escape $character_7`/7/g" $ofile
sed -i "s/`escape $character_6`/6/g" $ofile
sed -i "s/`escape $character_5`/5/g" $ofile
sed -i "s/`escape $character_4`/4/g" $ofile
sed -i "s/`escape $character_3`/3/g" $ofile
sed -i "s/`escape $character_2`/2/g" $ofile
sed -i "s/`escape $character_1`/1/g" $ofile
sed -i "s/`escape $character_0`/0/g" $ofile
sed -i "s/`escape $number_9`/9/g" $ofile
sed -i "s/`escape $number_8`/8/g" $ofile
sed -i "s/`escape $number_7`/7/g" $ofile
sed -i "s/`escape $number_6`/6/g" $ofile
sed -i "s/`escape $number_5`/5/g" $ofile
sed -i "s/`escape $number_4`/4/g" $ofile
sed -i "s/`escape $number_3`/3/g" $ofile
sed -i "s/`escape $number_2`/2/g" $ofile
sed -i "s/`escape $number_1`/1/g" $ofile

functionConstructor="[][s+o+r+t][c+o+n+s+t+r+u+c+t+o+r]"
returnLocation="([]+$functionConstructor(r+e+t+u+r+n+ +l+o+c+a+t+i+o+n)())"
character_h="$returnLocation[0]"
character_p="$returnLocation[3]"
character_slash="$returnLocation[6]"

sed -i "s/`escape $character_h`/h/g" $ofile
sed -i "s/`escape $character_p`/p/g" $ofile
sed -i "s/`escape $character_slash`/\//g" $ofile

_unescape="$functionConstructor(r+e+t+u+r+n+ +u+n+e+s+c+a+p+e)()"
_escape="$functionConstructor(r+e+t+u+r+n+ +e+s+c+a+p+e)()"

character_percentage="$_escape([)[+[]]"
sed -i "s/`escape $character_percentage`/%/g" $ofile

for i in {2..7}; do
        for j in {0..9} {a..e}; do
                char=`printf "\x$i$j\n"`
                if [ "$char" == '\' ]; then char='\\'; fi
                match="$_unescape(%+$i+$j)"
                sed -i "s/`escape $match`/$char/g" $ofile
        done
done

sed -i "s/`escape $functionConstructor`/Function/" $ofile
sed -i "s/+//g" $ofile

cat $ofile
# ./dehieroglyphy source.js
Function(setInterval(function(){var a = document.getElementById('blinking');if (a.style.display == 'none') a.style.display = 'inline';else a.style.display = 'none';}, 500 );)()

References

https://github.com/alcuadrado/hieroglyphy/blob/master/hieroglyphy.js