note
Crackers2
<p>Hmm I'm not getting an issue with that particular example; it's coming out f234fgerg5g for me.</p>
<p>I did say it was a quick hack though :)</p>
<p>To really emulate php you'd probably want to create a new function, something like:</p>
<code>
sub php_xor {
my ($p1,$p2) = @_;
my $len = length($p1) < length($p2) ? length($p1) : length($p2);
return substr($p1,0,$len) ^ substr($p2,0,$len);
}
</code>
<p>and use that where you currently have ^, giving something like:</p>
<code>
use MIME::Base64;
use Digest::MD5 qw(md5 md5_hex md5_base64);
use strict;
sub php_xor {
my ($p1,$p2) = @_;
my $len = length($p1) < length($p2) ? length($p1) : length($p2);
return substr($p1,0,$len) ^ substr($p2,0,$len);
}
sub md5_decrypt
{
my $iv_len = 16;
my $enc_text = decode_base64(shift);
my $password = shift;
my $n = length($enc_text);
my $i = $iv_len;
my $plain_text;
my $iv = substr(php_xor($password,substr($enc_text,0,$iv_len)), 0, 512);
my $x;
while ($i < $n) {
my $block = substr($enc_text, $i, 16);
$plain_text .= $block ^ pack('H*', md5_hex($iv));
$iv = php_xor(substr($block . $iv, 0, 512),$password);
$i += 16;
}
#$plain_text =~ s/\x13\x00*$//;
return $plain_text;
}
print md5_decrypt('2EC0KFZ1aGghEdySB+5Y9nbAfMrk9ky/89vwlA4HyTU=', '34giu34hgiu34hg') . "\n";
</code>
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