- * This function returns the OpenPGP packet containing a photo id from a
- * supplied key. index specifies which photo id should be returned. If
- * there's no such photo id NULL is returned.
+ * This function returns the photo data contained in a supplied key.
+ * index specifies which photo id should be returned. If there's no such
+ * photo id NULL is returned. The returned data pointer refers to the key
+ * data supplied rather than a copy of it.