X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/57496a500309c335ff9c60d3462757c0c5f04801..25f3ce6a509ff9e3a354303023cb2028e9f83b95:/symm/poly1305.h

diff --git a/symm/poly1305.h b/symm/poly1305.h
index bcc81c29..2441ad05 100644
--- a/symm/poly1305.h
+++ b/symm/poly1305.h
@@ -69,6 +69,7 @@ extern const octet poly1305_keysz[];
 #define POLY1305_BLKSZ 16u
 #define POLY1305_KEYSZ 16u
 #define POLY1305_MASKSZ 16u
+#define POLY1305_TAGSZ 16u
 
 /*----- Data structures ---------------------------------------------------*/
 
@@ -178,6 +179,23 @@ extern void poly1305_hash(poly1305_ctx */*ctx*/,
 
 extern void poly1305_flush(poly1305_ctx */*ctx*/);
 
+/* --- @poly1305_flushzero@ --- *
+ *
+ * Arguments:	@poly1305_ctx *ctx@ = MAC context to flush
+ *
+ * Returns:	---
+ *
+ * Use:		Forces any buffered message data in the context to be
+ *		processed, by hashing between zero and fifteen additional
+ *		zero bytes.  Like @poly1305_flush@, this has no effect if the
+ *		the message processed so far is a whole number of blocks.
+ *		Unlike @poly1305_flush@, the behaviour if the message is not
+ *		a whole number of blocks is equivalent to actually hashing
+ *		some extra data.
+ */
+
+extern void poly1305_flushzero(poly1305_ctx */*ctx*/);
+
 /* --- @poly1305_concat@ --- *
  *
  * Arguments:	@poly1305_ctx *ctx@ = destination context