typedef struct { ... } *SilcPublicKeyIdentifier,
                            SilcPublicKeyIdentifierStruct;

    This structure contains the SILC Public Key identifier.  Note that
    some of the fields may be NULL.

    typedef struct SilcPublicKeyIdentifierObject {
      char *username;
      char *host;
      char *realname;
      char *email;
      char *org;
      char *country;
      char *version;
    } *SilcPublicKeyIdentifier, SilcPublicKeyIdentifierStruct;