A libabac keystore is a simple directory filled with some number of X509 identity and XML attribute certificates. It may optionally include RSA private keys. X509 identity certs are identified as files whose names end in _ID.der or _ID.pem. The part before the _ID.pem is irrelevant, though for the sake of convneince the libabac credential manager gives it the name of the CN you supplied. XML attribute certs are identified as files whose names end in _attr.xml. The portion before the _attr.xml is irrelevant.