On 9/19/19 3:30 AM, Matthias Apitz wrote: > > Hello, > > Our software, a huge ILS, is running on Linux with DBS Sybase. To > connect to the Sybase server (over the network, even on localhost), > credentials must be known: a user (say 'sisis') and its password. > > For Sybase we have them stored on the disk of the system in a file > syb.npw as: > > $ cat /opt/lib/sisis/etc/syb/syb.npw > sisis:e53902b9923ab2fb > sa:64406def48efca8c > > for the user 'sisis' and the administrator 'sa'. Our software has as > shared library a blob which knows how to decrypt the password hash above > shown as 'e53902b9923ab2fb' into clear text which is then used in the > ESQL/C or Java layer to connect to the Sybase server. > > For PostgreSQL the password must be typed in (for pgsql) or can be > provided in an environment variable PGPASSWORD=blabla > > Is there somehow an API in PG to use ciphered passwords and provide as a > shared library the blob to decrypt it? If not, we will use the mechanism same as
There is not and I am not sure that would be much use even if it did exist. You would be right back at someone being able to grab the credentials from a file and feeding them to the database for access.
The system you currently have at least seems to limit access to a specific program external to Postgres.
> we use for Sybase. Or any other idea to not make detectable the > credentials? This was a request of our customers some years ago. > > matthias > >
