[Dovecot] Trying to building a customized auth plugin

[Antonio Perez-Aranda]

It take login user, pass and other dat from connection like remote ip
and send to a Java App with special security. If the result of Java
App is correct (more difficult to explain), then it pass ask to
standard courier ldap plugin.

2010/11/16 Alex Baule <alexwbaule at gmail.com>:
> What the preauthcustom.c does ? something special or setting some rights
> from users ?
>
> If was only auth, PAM is much more easy....
>
> 2010/11/16 Antonio Perez-Aranda <aperezaranda at yaco.es>
>
>> Maybe, but I haven't got any experience with PAM modules as with dovecot.
>>
>> I have a preauthcustom.c from courier which I have to migrate to dovecot.
>>
>> 2010/11/16 Alex Baule <alexwbaule at gmail.com>:
>> > Dovecot plugins works with hooks. This hooks allow you customize some
>> > actions.
>> >
>> > You need to find the authentication hook, and rewrite it's actions.
>> >
>> > Inside the userdb.c have it void userdbs_init(void), but you change the
>> > shared name, so you need to change inside your plugin too.
>> >
>> > But, you're trying to do something with auth, you can use PAM, it's more
>> > easy. (i think)
>> >
>> > 2010/11/16 Antonio Perez-Aranda <aperezaranda at yaco.es>
>> >
>> >> Well, all modules start with ifdef like this:
>> >>
>> >> #ifdef USERDB_CUSTOM
>> >>
>> >> And in this case, this isn't defined. I commet out this ifdef/else/if
>> >> block and then I have got more errors, I can continure.
>> >>
>> >> 2010/11/16 Antonio Perez-Aranda <aperezaranda at yaco.es>:
>> >> > Not, userdb-custom and passdb-custom are copies from
>> >> > userdb-passwd-file and passdb-passwd-file.
>> >> >
>> >> > I try with this function now, thanks.
>> >> >
>> >> > 2010/11/16 Alex Baule <alexwbaule at gmail.com>:
>> >> >> inside your plugin, have this function ? <authdb_custom_init>
>> >> >>
>> >> >> Every plugin must have a "init" function and it must call
>> >> "plugin-name_init"
>> >> >>
>> >> >>
>> >> >> 2010/11/16 Antonio Perez-Aranda <aperezaranda at yaco.es>
>> >> >>
>> >> >>> Is it needed to include custom db on usedb.c and passdb.c ?
>> >> >>>
>> >> >>> I can see at userdb.c:
>> >> >>>
>> >> >>> void userdbs_init(void)
>> >> >>>
>> >> >>> with all userdb registered, and similar at passdb.c
>> >> >>>
>> >> >>>
>> >> >>> At now, I get the follow line loading the module and trying to
>> access
>> >> >>> vía imap login
>> >> >>>
>> >> >>> Nov 16 17:54:28 auth: Error: module
>> >> >>> /usr/lib64/dovecot/auth/libauthdb_custom.so:
>> dlsym(authdb_custom_init)
>> >> >>> failed: /usr/lib64/dovecot/auth/libauthdb_custom.so: undefined
>> symbol:
>> >> >>> authdb_custom_init
>> >> >>> Nov 16 17:54:28 auth: Error: Module doesn't have init function:
>> >> >>> /usr/lib64/dovecot/auth/libauthdb_custom.so
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>> 2010/11/16 Antonio Perez-Aranda <aperezaranda at yaco.es>:
>> >> >>> > Well, I didn't execute ./configure on $DOVECOT path
>> >> >>> >
>> >> >>> > 2010/11/16 Antonio Perez-Aranda <aperezaranda at yaco.es>:
>> >> >>> >>  gcc -fPIC -shared -g -Wall \
>> >> >>> >>      -I$DOVECOT \
>> >> >>> >>      -I$DOVECOT/src/lib \
>> >> >>> >>      -I$DOVECOT/src/lib-auth  \
>> >> >>> >>      -I$DOVECOT/src/lib-sql \
>> >> >>> >>      -I$DOVECOT/src/lib-settings \
>> >> >>> >>      -I$DOVECOT/src/lib-ntlm \
>> >> >>> >>      -I$DOVECOT/src/lib-master \
>> >> >>> >>      -I$DOVECOT/src/auth \
>> >> >>> >>      -DHAVE_CONFIG_H \
>> >> >>> >>      -DAUTH_MODULE_DIR=\"passdb-custom\"\
>> >> >>> >>      passdb-custom.c -o passdb-custom.o
>> >> >>> >>
>> >> >>> >> With this I get:
>> >> >>> >>
>> >> >>> >> error on auth-common.h
>> >> >>> >> ...
>> >> >>> >> config.h Not found.
>> >> >>> >>
>> >> >>> >>
>> >> >>> >> But config.h are in $DOVECOT path
>> >> >>> >>
>> >> >>> >>
>> >> >>> >> 2010/11/15 Timo Sirainen <tss at iki.fi>:
>> >> >>> >>> On 15.11.2010, at 18.03, Antonio Perez-Aranda wrote:
>> >> >>> >>>
>> >> >>> >>>> gcc -fPIC -shared -g -Wall -I$DOVECOT \
>> >> >>> >>>>     -I$DOVECOT/src/lib \
>> >> >>> >>>>     -I$DOVECOT/src/lib-auth  \
>> >> >>> >>>>     -I$DOVECOT/src/lib-sql \
>> >> >>> >>>>     -I$DOVECOT/src/lib-settings \
>> >> >>> >>>>     -I$DOVECOT/src/lib-ntlm \
>> >> >>> >>>>     -I$DOVECOT/src/lib-master \
>> >> >>> >>>>     -I$DOVECOT/src/auth \
>> >> >>> >>>>     passdb-passwd-file.c -o passdb-passwd-file.o
>> >> >>> >>>>
>> >> >>> >>>> With this, I get errors relate with uoff_t
>> >> >>> >>>
>> >> >>> >>> You need to add -DHAVE_CONFIG_H
>> >> >>> >>>
>> >> >>> >>>
>> >> >>> >>
>> >> >>> >
>> >> >>>
>> >> >>
>> >> >
>> >>
>> >
>>
>