public AuthorityKeyIdentifierExtension() throws Exception {
super();
setOID(new ASN1ObjectIdentifier(ID_CE_AUTHORITY_KEY_IDENTIFIER));
setCritical(false);
keyIdentifier = new ASN1OctetString();
keyIdentifierTag = new ASN1TaggedType(KEY_IDENTIFIER_TYPE,
keyIdentifier, false, true);
authorityKeyIdentifier.add(keyIdentifierTag);
certIssuer = new ASN1SequenceOf(GeneralName.class);