in reply to gettin back crypted password

There shouldn't be. But there is, because when crypt was designed nobody envisioned it being attacked with the kind of computing power that is now routine. However you aren't supposed to do that.

Therefore the answer is that you should use better cryptography and accept that the answer is "no".

UPDATE I got confused about which crypt Perl uses internally. The crypt program on Unix is easily broken. The crypt library call is not. However most people pick bad passwords, so it is easy to just brute-force through likely passwords and you'll successfully "decrypt" a lot of passwords.

In Section Seekers of Perl Wisdom