Add an internal-representation no-op function.

[u/mdw/catacomb] / sha.h

diff --git a/sha.h b/sha.h
index c231da0..97003ef 100644 (file)
--- a/sha.h
+++ b/sha.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: sha.h,v 1.3 1999/12/10 23:20:03 mdw Exp $
+ * $Id: sha.h,v 1.5 2000/10/15 19:09:20 mdw Exp $
  *
  * Implementation of the SHA-1 hash function
  *
@@ -30,6 +30,13 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: sha.h,v $
+ * Revision 1.5  2000/10/15 19:09:20  mdw
+ * Support HMAC mode for hash functions which need to store more state than
+ * the hash output size.
+ *
+ * Revision 1.4  2000/06/17 11:32:52  mdw
+ * Change buffer offset to be unsigned.
+ *
  * Revision 1.3  1999/12/10 23:20:03  mdw
  * New hash interface requirements.
  *
@@ -69,13 +76,14 @@
 
 #define SHA_BUFSZ 64
 #define SHA_HASHSZ 20
+#define SHA_STATESZ 20
 
 /*----- Data structures ---------------------------------------------------*/
 
 typedef struct sha_ctx {
   uint32 a, b, c, d, e;                        /* Chaining variables */
   uint32 nl, nh;                       /* Byte count so far */
-  int off;                             /* Offset into buffer */
+  unsigned off;                                /* Offset into buffer */
   octet buf[SHA_BUFSZ];                        /* Accumulation buffer */
 } sha_ctx;