Okay, let's say you have to integrate with a third party product that can only deal with passwords in normal crypt(). What do you do then? (Rewrite third party

Okay, let's say you have to integrate with a third party product that can only deal with passwords in normal crypt(). What do you do then? (Rewrite third party product is not a valid answer). What if you're integrating with something like a Windows VPN w/RADIUS, which needs the plaintext password? Bcrypt, while trivial for many applications, is not the answer to everything.