MIEName targ = new MIEName(this.gssContext.getTargName().export());

        ASN1ObjectIdentifier mech = ASN1ObjectIdentifier.getInstance(this.gssContext.getMech().getDER());
        for (KerberosTicket ticket : subject.getPrivateCredentials(KerberosTicket.class)) {
            MIEName client = new MIEName(mech, ticket.getClient().getName());

    // Format: TOK_ID(2 bytes) | OID_LEN(2 bytes) | OID_DER | NAME_LEN(4 bytes) | NAME(bytes)
    private static byte[] buildExportName(Oid mech, String name) throws GSSException {
        byte[] der = mech.getDER();
        byte[] nb = name.getBytes();
        int len = 2 + 2 + der.length + 4 + nb.length;
        byte[] out = new byte[len];
        int i = 0;
        out[i++] = 0x04; // TOK_ID[0]