maria-developers team mailing list archive

[Denis Scherbakov <8525.2354@xxxxxxxxxxx>]

Hello Sergei,

Thank you for your clarification question.

I thought about it and came to a conclusion that having security_ctx 
empty is an unusual case that lead me to thinking that MariaDB version 
was the cause.

I upgraded my server version from 5.5.65 to 10.5.4 and the UDFs started 
to work, security_ctx was no longer empty and I could extract a 
username.

Thank you!

Best regards,
Denis



On 2020-07-31 18:07, Sergei Golubchik wrote:
> Hi, Denis!
>
> On Jul 31, Denis Scherbakov wrote:
> > Hello guys,
> >
> > I am building a set of MariaDB UDFs that require to know a name of a
> > user who called them in each and every call. Users should not be able 
> > to
> > pretend as someone else, hence usernames as an argument cannot be 
> > used.
> >
> > I compile UDFs against MariaDB headers and I was able to obtain the
> > current_thd, but the security_ctx pointer inside is NULL.
> >
> > Could somebody give me a hint what I am doing wrong?
> >
> > Thank you for your answers!
>
> Can you show a stack trace from where you see security_ctx being NULL 
> in
> your UDF?
>
> Regards,
> Sergei
> VP of MariaDB Server Engineering
> and security@xxxxxxxxxxx