- fixed some docu issues

Source/charon/transforms/hmac.h

@@ -70,7 +70,7 @@ struct hmac_t {
 	 * @param data			chunk of data to authenticate
 	 * @param [out]chunk	chunk which will hold generated bytes
 	 * @return				
-	 * 						- SUCCESS in any case
+	 * 						- SUCCESS, or
 	 * 						- OUT_OF_RES if space could not be allocated
 	 */
 	status_t (*allocate_mac) (hmac_t *this, chunk_t data, chunk_t *chunk);
@@ -90,9 +90,10 @@ struct hmac_t {
 	 * 
 	 * @param this			calling hmac
 	 * @param key			key to set
-	 * @return				block size in bytes
+	 * @return				
+	 * 						- SUCCESS in any case
 	 */
-	size_t (*set_key) (hmac_t *this, chunk_t key);
+	status_t (*set_key) (hmac_t *this, chunk_t key);
 	
 	/**
 	 * @brief Destroys a hmac object.