How to search for an object by class in the LDAP base?

Question

I'm trying to search an LDAP for an object of a specific class, but it always returns

result: 32 No such object

Background:

I'm trying to access a PGP Universal server at keyserver.pgp.com which is a PGP server with LDAP access. It has an object of class pgpServerInfo that holds some informatione about how the PGP keys can be retrieved.

I am not well versed with LDAP, so my approach may be completely wrong.

This is what I tried:

ldapsearch -v -x -H ldap://keyserver.pgp.com "(objectclass=pgpServerInfo)"

I've also tried to add -s base and -s one, but no difference.

This works:

ldapsearch -v -x -b "cn=PGPServerInfo" -H ldap://keyserver.pgp.com "(objectClass=pgpServerInfo)"

But by doing so, I have to assume the object's name which I would like to avoid.

What's the correct query to find the object?

Answer 1

If you want to avoid assuming a base name you can try the following:
ldapsearch -v -x -s base -H ldap://keyserver.pgp.com "(objectclass=*)" +

Note the + in the search. This will list "operational attributes".

This should provide you with a bunch of information including a number of "namingContexts". You can then choose the namingContexts until you get which one you're looking for.