How JRE translates oid number to it's name?

Question

Hello all.
I need to share a string with the issuer of a certificate with other systems.
The issuer has an attribute with "oid.1.2.840.113549.1.9.1" that is translated to "EMAILADDRESS" in IBM's Websphere's JRE , but in other implementations is translated to "E"
Where is hardcoded this translation? Can I programaticaly control this translation?
Best regards,
Rpr

Answer 1

java.security.cert.X509Certificate has two methods, getIssuerX500Principal() and getSubjectX500Principal() that return the issuer and subject as instances of class javax.security.auth.x500.X500Principal. This class has a method getName() that takes a map of OID strings to OID names. You could use customize a map for your needs, .e.g.
Map<String, String> oidMap = new HashMap<String, String>();
oidMap.put("1.2.840.113549.1.9.1", "EMAILADDRESS");
X500Principal subjName = myx509Cert.getSubjectX500Principal();
String subjName = subject.getName("RFC2253", oidMap);