[Dovecot] Migarting password scheme

[Timo Sirainen]

On 21.3.2013, at 18.51, lst_hoe02 at kwsoft.de wrote:

> Hello,
> 
> by the move to Dovecot we try to alter the password encryption stored in the database from MD5 to CRYPT-SHA256 along the Guide at http://wiki2.dovecot.org/HowTo/ConvertPasswordSchemes. It's mostly working but i still have not found out how to pass the cleartext password to the re-encrypting script. According to the HowTo it should be enough to add "'%w' AS userdb_plain_pass" to the passdb query, to get a environment variable $PLAIN_PASS in the post-login script to pass along.
> This does not work eg. PLAIN_PASS is always empty. This is Dovecot 2.0.19 from Ubuntu 12.04 LTS.

userdb_plain_pass method requires that you use userdb prefetch.

And Daryl's method of using %w in regular userdb .. I'm not really sure how well that works. Could easily be that different Dovecot versions behave differently.