Re: Newbie confused about pg_hba/md5 and password field

Well, if you store your passwords as encrypted in pg_shadow, then only
MD5 will work for authentication. If you don't encrypt them, you can
use any auth method like 'crypt' or 'password'.

I don't know what authlib is, but it is very possible it doesn't have
this md5 capability.

---------------------------------------------------------------------------

Scott Dunbar wrote:
> Bruce,
> Thanks for the information. On further testing I indeed cannot
> reproduce the issue with a standalone program, only with the authlib
> that I'm trying to get to work. I did learn that my thinking was wrong
> though. I thought the AUTH_TYPE in pg_hba.conf was for transport only,
> having nothing to do with the encryption used to encrypt passwords in
> pg_shadow. That does not appear to be the case as if you use md5 in
> your pg_shadow and just "password" in your pg_hba.conf file you'll get
> an error.
>
> I'll keep digging. I am confident that my libpg.so is correct as this
> is a new installation of everything.
>
> Thanks again for the feedback.
>
>
> Bruce Momjian wrote:
>
> >Sorry, this seems impossible: libpq's PQsetdbLogin() doesn't allow MD5
> >passwords? You shouldn't have to do anything special; it should just
> >accept the password.PQconnectdb() has the same handling as
> >PQsetdbLogin().
> >
> >Is it possible your libpq version is older than 7.2.1?
> >
> >---------------------------------------------------------------------------
> >
> >Scott Dunbar wrote:
> >
> >
> >>Hello,
> >>I'm pretty new to PostgreSQL in general and even newer to libpq. I am
> >>trying to get a C program working (the authpgsql module in courier-imap)
> >>that uses PQsetdbLogin(). I've got 7.2.1 installed and running and have
> >>had no problem accessing it via JDBC. I have encrypted passwords in
> >>pg_shadow and have "md5" set for the AUTH_TYPE in pg_hba.conf. However,
> >>when using PQsetdbLogin the only way I could get a login to work was to
> >>use unencrypted passwords in pg_shadow and change pg_hba.conf to use
> >>"password" instead of "md5" for the database I want access to through
> >>authpgsql.
> >>
> >>Why is this? Do I somehow have to md5 the clear text password before
> >>calling PQsetdbLogin()? Does PQconnectdb() handle this and I should
> >>update the code? I feel that the client code should be unaware of the
> >>over the wire encryption method used and the encryption method of the
> >>password in pg_shadow but I may be way off base on the underlying issue.
> >>
> >>Thanks in advance for any information.
> >>
> >>
> >>
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> >>
> >>
> >>
> >
> >
> >
>
>
>
>
>

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