DSS Public Key Certificate

[Tarun Upadhyay]

I am currently implementing TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA ciphersuite.
While sending server certificates during handshake, I hit on two issues:
a) DHE_DSS requires DSS Public Key to be sent in certificate. Where is this
key typically available on the server? Is it available as X.509v3 signed
certificate or in some other format which needs to be encoded in X.509?
b) If the answer to the first question is "some other format", do we have
open source APIs (say, in other gnupg projects) available for encoding to
X.509, ASN.1 etc.?

Regards
Tarun