dovecot - Jul 2015 - ldap attribute modifiers. how to lowercase non ASCII

hi all,

I encountered some problem with lowercasing chars like an "?"

with user_attrs like this:

user_attrs = uid=home=/mail/%Lu, =myvar=%L{ldap:uid}

the ? doesnt get lower cased in both cases


# doveadm user BL?TULA
field	value
user	bl?tula
uid	vmail
gid	vmail
home	/mail/bl?tula
mail	maildir:~/Maildir:LAYOUT=fs:INBOX=~/Maildir/INBOX
myvar	bl?tula


somebody knows if there a fix for that?


Greetz Matze

update of investigation...

I encountered a different behavior in %Lu and %L{ldap:uid} when doing
the search with lower cased user.

# doveadm user bl?tula

field	value
uid	vmail
gid	vmail
home	/var/data/vmail/private/bl?tula
mail	maildir:~/Maildir:LAYOUT=fs:INBOX=~/Maildir/INBOX
spuser	private/bl?tula


so in this case. the name gets lowered in the %Lu but not the
%L{ldap:uid} case.

- The user in ldap is all upper case.
- system locale is en_US.UTF-8


log of the above doveadm query:


mail.debug: Jul 29 12:45:28 dovecot: auth: Debug: master in: USER	1
bl?tula	service=doveadm
mail.debug: Jul 29 12:45:28 dovecot: auth: Debug: ldap(bl?tula): userdb
cache miss
mail.debug: Jul 29 12:45:28 dovecot: auth: Debug: ldap(bl?tula): user
search: base=ou=users, dc=uma,dc=local scope=subtree
filter=(&(objectClass=inetOrgPerson)(uid=bl?tula)) fields=uid,uid
mail.debug: Jul 29 12:45:28 dovecot: auth: Debug: ldap(bl?tula): result:
uid=BL?TULA; uid unused
mail.debug: Jul 29 12:45:28 dovecot: auth: Debug: ldap(bl?tula): result:
uid=BL?TULA
mail.debug: Jul 29 12:45:28 dovecot: auth: Debug: userdb out: USER	1
bl?tula	home=/var/data/vmail/private/bl?tulaspuser=private/bl?tula






On 07/28/2015 05:15 PM, matthias lay wrote:
> hi all,
> 
> I encountered some problem with lowercasing chars like an "?"
> 
> with user_attrs like this:
> 
> user_attrs = uid=home=/mail/%Lu, =myvar=%L{ldap:uid}
> 
> the ? doesnt get lower cased in both cases
> 
> 
> # doveadm user BL?TULA
> field	value
> user	bl?tula
> uid	vmail
> gid	vmail
> home	/mail/bl?tula
> mail	maildir:~/Maildir:LAYOUT=fs:INBOX=~/Maildir/INBOX
> myvar	bl?tula
> 
> 
> somebody knows if there a fix for that?
> 
> 
> Greetz Matze
>

On 28 Jul 2015, at 18:15, matthias lay <matthias.lay at securepoint.de>
wrote:
> 
> hi all,
> 
> I encountered some problem with lowercasing chars like an "?"
> 
> with user_attrs like this:
> 
> user_attrs = uid=home=/mail/%Lu, =myvar=%L{ldap:uid}
> 
> the ? doesnt get lower cased in both cases
There are various different algorithms to lowercase non-ASCII characters.
Dovecot even has some code to do it if libicu is compiled in. Still, I'm not
planning changing %L behavior anytime soon. Non-ASCII usernames don't work
especially well now and I don't even want to try to support them well right
now. That would require bigger design changes.