X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/79ba130cb5776f994f6a3f0f87159d8cbc5ff129..3884054be9261b4607f5f3a2d0b79695f65b851f:/hmac.h

diff --git a/hmac.h b/hmac.h
index d64003f..e9c8d78 100644
--- a/hmac.h
+++ b/hmac.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: hmac.h,v 1.2 1999/12/10 23:17:39 mdw Exp $
+ * $Id: hmac.h,v 1.6 2001/04/19 18:24:45 mdw Exp $
  *
  * Generic code for HMAC and NMAC
  *
@@ -30,6 +30,19 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: hmac.h,v $
+ * Revision 1.6  2001/04/19 18:24:45  mdw
+ * Provide correct key sizes for NMAC, HMAC and SSLMAC.
+ *
+ * Revision 1.5  2001/04/03 19:35:45  mdw
+ * Support the SSL HMAC variant (untested).
+ *
+ * Revision 1.4  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 1.3  2000/06/17 11:23:57  mdw
+ * New key size interface.
+ *
  * Revision 1.2  1999/12/10 23:17:39  mdw
  * Split mode macros into interface and implementation.
  *
@@ -81,9 +94,9 @@
 /* --- An HMAC or NMAC key --- */					\
 									\
 typedef struct pre##_mackey {						\
-  octet ochain[PRE##_HASHSZ];		/* Chaining for outer hash */	\
+  octet ochain[PRE##_STATESZ];		/* Chaining for outer hash */	\
   unsigned ocount;			/* Byte count for outer hash */	\
-  octet ichain[PRE##_HASHSZ];		/* Chaining for inner hash */	\
+  octet ichain[PRE##_STATESZ];		/* Chaining for inner hash */	\
   unsigned icount;			/* Byte count for inner hash */	\
 } pre##_mackey;								\
 									\
@@ -91,10 +104,16 @@ typedef struct pre##_mackey {						\
 									\
 typedef struct pre##_macctx {						\
   pre##_ctx ctx;			/* Context for main hashing */	\
-  octet chain[PRE##_HASHSZ];		/* Chaining for outer hash */	\
+  octet chain[PRE##_STATESZ];		/* Chaining for outer hash */	\
   unsigned count;			/* Byte count for outer hash */	\
 } pre##_macctx;								\
 									\
+/* --- Other useful constants --- */					\
+									\
+extern const octet pre##_hmackeysz[];					\
+extern const octet pre##_nmackeysz[];					\
+extern const octet pre##_sslmackeysz[];					\
+									\
 /* --- @pre_nmacinit@ --- *						\
  *									\
  * Arguments:	@pre_macctx *key@ = pointer to a MAC key object		\
@@ -127,6 +146,21 @@ extern void pre##_nmacinit(pre##_mackey */*key*/,			\
 extern void pre##_hmacinit(pre##_mackey */*key*/, 			\
 			   const void */*k*/, size_t /*sz*/);		\
 									\
+/* --- @pre_sslmacinit@ --- *						\
+ *									\
+ * Arguments:	@pre_mackey *key@ = pointer to MAC key object		\
+ *		@const void *k@ = pointer to key to use			\
+ *		@size_t sz@ = size of key data				\
+ *									\
+ * Returns:	---							\
+ *									\
+ * Use:		Initializes a MAC key for doing hasing using the SSL3	\
+ *		variant of HMAC.					\
+ */									\
+									\
+extern void pre##_sslmacinit(pre##_mackey */*key*/,			\
+			     const void */*k*/, size_t /*sz*/);		\
+									\
 /* --- @pre_macinit@ --- *						\
  *									\
  * Arguments:	@pre_macctx *ctx@ = pointer to MAC context block	\
@@ -168,7 +202,9 @@ extern void pre##_macdone(pre##_macctx */*ctx*/, void */*mac*/);	\
 									\
 /* --- Generic MAC interface --- */					\
 									\
-extern const gcmac pre##_hmac;
+extern const gcmac pre##_hmac;						\
+extern const gcmac pre##_nmac;						\
+extern const gcmac pre##_sslmac;
 
 /*----- That's all, folks -------------------------------------------------*/