Geek Outpost

I was working on a web interface to ease the addition of users/domains, aliases and forwards to my Postfix-sasl-smtp_auth mysql setup. I knew that the passwords were using mysql’s encypt() function, and this was the only way I was able to get postfix to authenticate and play nice with encrypted passwords. On the PHP side I was using PDO and I was looking for a way to encrypt the passwords using php, that would still allow users to authenticate when sending mail.

$salt = substr($_POST['postfix_mailbox_password'], 0, 2);
$password = crypt($_POST['postfix_mailbox_password'], $salt);

After much trial and error I finally had a working solution, by taking the first two characters of the password and using them as the salt value, I could then use PHP’s crypt() with the salt value to encrypt the password.

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