in reply to decompile perlapp 4.1

This works on standard compressed exes from PerlApp 5.3.0, although it's extremely slow (~20KByte/sec) and not hugely helpful (since it doesn't bother reading the filenames), and may not work on PerlApp 4.1; but it does usually work for me, and is marginally better than nothing. 
use strict;
use warnings;

use Compress::Zlib;

++$|;

open IN, 'test.exe' or die $!;
binmode IN;
read IN, my $data, 1e8;

my $piecenum=0;

my $progress = progress(length $data);
my $piecedata;
for (0..length($data)-1) {
    $progress->($_);
    $piecedata = uncompress("\x78\x9c" . substr $data, $_);
    if (defined $piecedata) {
        print "\nFound piece at $_\n";
        open OUT, sprintf('>piece_%03d.txt', $piecenum++) or die $!; b
+inmode OUT;
        print OUT $piecedata ^ chr(0xAA) x length $piecedata;
    }
}

sub progress {
    my $max = $_[0];
    my $last = 0;
    return sub { print $last = int(100*$_[0]/$max), "%... " if $last !
+= int(100*$_[0]/$max) };
}

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Re^2: decompile perlapp 4.1
by sorenb (Novice) on Sep 29, 2004 at 10:23 UTC
    Thanks a million times Excors. You have just made me a very happy man! It works perfectly and slow or fast is not a problem for me, I would gladly wait a month to get the code back. ActiveState would not help me at all, so I'm glad you were there to save my life :) And... I will never work on local perl copies anymore, that's for sure! Best regards Soren
[reply]
Re^2: decompile perlapp 4.1
by Anonymous Monk on Dec 04, 2009 at 12:56 UTC
    made it a bit faster. You need Tie::CharArray, but it is worth the speedup. 
    use strict;
use warnings;
use Tie::CharArray;
use Compress::Zlib;

++$|;

my $filename = $ARGV[0] || die "usage: need a filename";
if ( ! -f "$filename" ) {
    print STDERR "couldn't open: $filename\n";
    exit(-1);
}

open IN, $filename or die $!;
binmode IN;
read IN, my $stringdata, 1e8;

tie my @data, 'Tie::CharArray', $stringdata;

my $piecenum=0;

my $progress = progress(length $stringdata);
my $piecedata;
for (0..length($stringdata)-1) {
    $progress->($_);
    shift(@data);
    $data[0] = "\x78";
    $data[1] = "\x9c";
    ( $piecedata = uncompress($stringdata)) || next;
    print "\nFound piece at $_\n";
    open OUT, sprintf('>piece_%03d.txt', $piecenum++) or die $!; binmo
+de OUT;
    print OUT $piecedata ^ chr(0xAA) x length $piecedata;
}

sub progress {
    my $max = $_[0];
    my $last = 0;
    return sub { print $last = int(100*$_[0]/$max), "%... " if $last !
+= int(100*$_[0]/$max) };
}

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[d/l]
Re^2: decompile perlapp 4.1
by Anonymous Monk on Jul 14, 2010 at 07:46 UTC
    You are just wonderful!
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