Pass type of requested key in the callback credential set

src/libstrongswan/credentials/sets/callback_cred.h

@@ -28,12 +28,14 @@ typedef struct callback_cred_t callback_cred_t;
 /**
  * Callback function to get shared keys.
  *
+ * @param type			type of requested shared key
  * @param me			own identity
  * @param other			other identity
  * @param match_me		match result of own identity
  * @param match_other	match result of other identity
  */
-typedef shared_key_t* (*callback_cred_shared_cb_t)(void *data,
+typedef shared_key_t* (*callback_cred_shared_cb_t)(
+								void *data, shared_key_type_t type,
 								identification_t *me, identification_t *other,
 								id_match_t *match_me, id_match_t *match_other);