Re: Testing use of krb5 and gssapi in PostgreSQL?

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On 16.10.19 10:43, Michael Stahl wrote:
On 16.10.19 08:46, Stephan Bergmann wrote:
On 14/10/2019 13:33, Lionel Élie Mamane wrote:
On Mon, Oct 14, 2019 at 11:05:32AM +0200, Stephan Bergmann wrote:
The only use of WITH_KRB5 and WITH_GSSAPI in LO appears to be the PostgreSQL
support (see connectivity/Library_postgresql-sdbc-impl.mk and
external/postgresql/ExternalProject_postgresql.mk).  Is there some
documentation how to test whether the use of krb5 and gssapi in the
PostgreSQL support actually works?

Try to connect to a PostgreSQL support with GSSAPI and Kerberos?

For the record:  Found a PostgreSQL server inside RH that I could access with my RH Kerberos credentials.  What I tested was "File - New - Database", then on the wizard's first "Select database" page "Connect to an existing database: PostgreSQL", on the second "Connection settings" page specify "host=... port=5433 dbname=public sslmode=require", and on the third "Set up user authentication" page leave everything blank and click "Test Connection".  This worked with a local Linux LO build, announcing a successful test of the connection.

For both the current LO 6.3.2 Flathub build against org.freedesktop.Sdk//18.08 (where krb5 is included in the runtime), as well as for a local LO 6.3.2 Flatpak build of <https://github.com/flathub/org.libreoffice.LibreOffice/pull/104> "Freedesktop19.08" (against org.freedesktop.Sdk//19.08, where krb5 is no longer included in the runtime, but where I bundle it with LO), it worked as follows:

The test failed to access my Kerberos ticket from outside the Flatpak sandbox (the connection test reporting an error ending in "GSSAPI continuation error: No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_1000)").  But it worked when I explicitly obtained a ticket inside the sandbox first (`flatpak run --command=bash org.libreoffice.LibreOffice`, then in the sandbox `kinit ... && /app/libreoffice/program/soffice`).

guess FILE and DIR credential cache won't work out of the box, err i mean inside the (sand-)box, but there's another one the KEYRING which stores it in the Linux kernel - i wonder if that is available inside the sandbox?  might be a question for people who actually know something about kerberos :)

https://web.mit.edu/kerberos/krb5-1.12/doc/basic/ccache_def.html

on the other hand it's a very obscure feature probably, maybe not worth investing any effort in it...

oh, there's even another one specifically developed for containers now:

https://fedoraproject.org/wiki/Changes/KerberosKCMCache

wonder why it's not used in your case when it's claimed to be the default, did you install pre-Fedora27 and retain an older default?

got this here, but of course no kerberos server to test...
/etc/krb5.conf.d/kcm_default_ccache:    default_ccache_name = KCM:
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