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

    Decoded SILC Public Key identifier.  Note that some of the fields
    may be NULL.  This context is allocated by the function
    silc_pkcs_decode_identifier and freed by silc_pkcs_free_identifier.
    The identifier in SilcPublicKey is the `identifier' field, which
    can be given as argument to silc_pkcs_decode_identifier.

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