Re: Postgresql security checks

On Wed, Sep 1, 2010 at 5:02 AM, Thom Brown <thom@linux.com> wrote:

> SELECT usename
> FROM pg_shadow
> WHERE passwd = 'md5' || md5(usename)
> OR passwd = 'md5' || md5('company_password');

I think this query should be:

  SELECT usename
    FROM pg_shadow
    WHERE passwd = 'md5' || md5(usename || usename) OR
                   passwd = 'md5' || md5('company_password' || usename);

Since the md5 passwords in pg_shadow (and pg_authid) are created as:
  MD5(password || username)

By the way, the documentation pages for pg_authid and pg_shadow don't
mention that md5 passwords are stored in this fashion, perhaps they
should? Or is this fact documented somewhere else I'm not seeing?

Josh