lprng uses private Kerberos Functions?

Patrick Powell papowell at astart.com
Wed Feb 20 08:27:01 EST 2002

> From hua-ying at usa.net Tue Feb 19 23:23:33 2002
> Date: Wed, 20 Feb 2002 02:23:31 -0500
> From: Hua Ying Ling <hua-ying at usa.net>
> To: papowell at lprng.com
> Subject: lprng uses private Kerberos Functions?
> Hi,
> I got several link errors while compiling LPRNG for Mac OS X.
> I've attached the response from krbdev about these errors.  Any
> thoughts on the best, most portable solution for these
> problems?
> PS. Tried posting to the lprng at egroups.com
> Thanks
> ~Hua Ying
> http://diswww.mit.edu:8008/menelaus.mit.edu/krb5dev/6890

Your original email ended up in my Spam Collection Sack, and this
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Patrick Powell                 Astart Technologies,
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> incase link doesn't work ...
> ==============================
> >I'm trying to compile LPRNG with Kerberos support for MacOS X but
> >I'm getting an undefined symbols for _krb5_read_message
> >_krb5_write_message _krb5_xfree _valid_cksumtype.  I have included
> >the Kerberos5Core framework which seems to have these symbols
> >defined.  This is the prototype found in the code, are they
> >different from the version of Kerberos for the Mac?

Try downloading the latest Kerberos release from MIT, install
it,  then use:

./configure --with-ldopts="-L/usr/local/lib" \
  --with-cppopts="-I/usr/local/include" --enable-kerberos

> krb5_read_message, krb5_write_message, krb5_xfree, valid_cksumtype
> are private functions internal to the Kerberos 5 library.  As a
> result, they are not exported by the Kerberos framework, and you
> should not be calling them.  Yes, I realize that they are in the
> krb5.h header file, but they shouldn't be.

Ummm... have you heard of 'legacy software support?'

The various kerberized utilities use them,  and I ripped the
code out of the kerberos utilities :-)

> krb5_read_message and krb5_write_message just send and receive data
> on the network.  You should be able to replace these functions with
> your own versions fairly easily.
> krb5_xfree is deprecated because there are now krb5_free_<type>
> functions for all krb5 types allocated inside the library.  You
> should check the krb5 type you are passing into krb5_xfree and find
> the appropriate free function in krb5.h.

Right.  Good idea!  I will look at this.

> valid_cksumtype is a krb5 crypto API.  I'm not sure how you should go
> about replacing this function.  I'll leave that to other folks on the
> krbdev list.
> Hope this helps,
> --lxs
> --
> -----------------------------------------------------------------------------
> Alexandra Ellwood
> <lxs at mit.edu>
> MIT Information Systems
> http://mit.edu/lxs/www/
> -----------------------------------------------------------------------------
> --
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