#!/usr/bin/perl

#
# mask.pl v0.1_alpha by X-3mE
# generate perl Obfu with a code
# file and a mask
#
# released under GNU GPL terms
#

my $file=shift @ARGV; # code file name
my $mask=shift @ARGV; # mask/image file
my $dot=shift @ARGV;  # dot (the symbol
                      # used in the image
                      # file)
my $codestr;          # string containing
                      # the entire perl code

# check the args existance
unless($file or $mask) {
	die "Usage: $0 file obfu_mask [dot]\n"
}

# checking dot arg existance:
# if not, the std dot is '#'
unless($dot) {
	$dot='#'
}

# open the source code file
open(FILE,"<$file") or die "Error: file $file\n";

# kill \n's, \t's, spaces and so on
# if you want a space in your code, use ^'s

while($f=<FILE>) {
	$f=~s/\s//g;
	$codestr.=$f
}
close(FILE);

# put the "clean" code in a temp file
open(FILE,">$file.tmp") or die "Error: temp file $file\n";
print FILE $codestr;
close(FILE);
open(FILE,"<$file.tmp") or die "Error: temp file $file\n";

open(MASK,"<$mask") or die "Error: file $mask\n";

my $c;
print '$_=q%'."\n";

# apply code to the mask
while(<MASK>) {
	while(/$dot/) {
		$c=getc(FILE);
		s/$dot/$c/e
	}
	print
}
# print exceeding code chars
unless(eof(FILE)) {
	while(!eof(FILE)) {
		$c=getc(FILE);
		print $c
	}
}
# print final instructions
print "\n";

# old one was:
#print '%;'."\n\n".'s/\s//g;'."\n".'s/\^/ /g;'."\n";
print '%;'."\n\n".'s/\s+//g;'."\n".'s/\^/ /g;'."\n";

# add other substitution code here
print "\neval\n";
close(MASK);
unlink("$file.tmp") # remove temp file

# in old code it was so:
# system("rm -rf $file.tmp")


# end #