typedef struct { ... } SilcPrivateMessageKeys;

    Structure to hold the list of private message keys. The list of these
    structures is returned by the silc_client_list_private_message_keys
    function.

    typedef struct SilcPrivateMessageKeysStruct {
      SilcClientEntry client_entry;       /* The remote client entry */
      char *cipher;                       /* The cipher name */
      unsigned char *key;                 /* The original key, If the appliation
                                             provided it. This is NULL if
                                             the SKE key material was used. */
      SilcUInt32 key_len;                 /* The key length */
    } *SilcPrivateMessageKeys;