X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/c850c0da81ad9f72315f8e6e26bdfbd98daf9d89..7fb0660b6d7237a7ec859459b2e511eebc0dcdb5:/sha256.h

diff --git a/sha256.h b/sha256.h
index 50d61fa..7b21dd2 100644
--- a/sha256.h
+++ b/sha256.h
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: sha256.h,v 1.2 2000/10/15 19:09:20 mdw Exp $
+ * $Id$
  *
  * Implementation of the SHA-256 hash function
  *
  * (c) 2000 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,31 +15,19 @@
  * it under the terms of the GNU Library General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
- * 
+ *
  * Catacomb is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Library General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Library General Public
  * License along with Catacomb; if not, write to the Free
  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: sha256.h,v $
- * Revision 1.2  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 1.1  2000/10/15 17:48:15  mdw
- * New SHA variants with longer outputs.
- *
- */
-
-/*----- Notes on the SHA-256 hash function ----------------------------------*
+/*----- Notes on the SHA-256 hash function --------------------------------*
  *
  * SHA-1 (Secure Hash Algorithm) was designed by the NSA, for use with the
  * Digital Signature Algorithm.  This is an evolution with a larger output
@@ -49,6 +37,7 @@
 
 #ifndef CATACOMB_SHA256_H
 #define CATACOMB_SHA256_H
+#define CATACOMB_SHA224_H
 
 #ifdef __cplusplus
   extern "C" {
@@ -68,6 +57,10 @@
 #define SHA256_HASHSZ 32
 #define SHA256_STATESZ 32
 
+#define SHA224_BUFSZ 64
+#define SHA224_HASHSZ 28
+#define SHA224_STATESZ 32
+
 /*----- Data structures ---------------------------------------------------*/
 
 typedef struct sha256_ctx {
@@ -75,11 +68,11 @@ typedef struct sha256_ctx {
   uint32 nl, nh;			/* Byte count so far */
   unsigned off;				/* Offset into buffer */
   octet buf[SHA256_BUFSZ];		/* Accumulation buffer */
-} sha256_ctx;
+} sha256_ctx, sha224_ctx;
 
 /*----- Functions provided ------------------------------------------------*/
 
-/* --- @sha256_compress@ --- *
+/* --- @sha256_compress@, @sha224_compress@ --- *
  *
  * Arguments:	@sha256_ctx *ctx@ = pointer to context block
  *		@const void *sbuf@ = pointer to buffer of appropriate size
@@ -90,8 +83,9 @@ typedef struct sha256_ctx {
  */
 
 extern void sha256_compress(sha256_ctx */*ctx*/, const void */*sbuf*/);
+#define sha224_compress sha256_compress
 
-/* --- @sha256_init@ --- *
+/* --- @sha256_init@, @sha224_init@ --- *
  *
  * Arguments:	@sha256_ctx *ctx@ = pointer to context block to initialize
  *
@@ -101,8 +95,9 @@ extern void sha256_compress(sha256_ctx */*ctx*/, const void */*sbuf*/);
  */
 
 extern void sha256_init(sha256_ctx */*ctx*/);
+extern void sha224_init(sha256_ctx */*ctx*/);
 
-/* --- @sha256_set@ --- *
+/* --- @sha256_set@, @sha224_set@ --- *
  *
  * Arguments:	@sha256_ctx *ctx@ = pointer to context block
  *		@const void *buf@ = pointer to state buffer
@@ -117,8 +112,9 @@ extern void sha256_init(sha256_ctx */*ctx*/);
 
 extern void sha256_set(sha256_ctx */*ctx*/, const void */*buf*/,
 		       unsigned long /*count*/);
+#define sha224_set sha256_set
 
-/* --- @sha256_hash@ --- *
+/* --- @sha256_hash@, @sha224_hash@ --- *
  *
  * Arguments:	@sha256_ctx *ctx@ = pointer to context block
  *		@const void *buf@ = buffer of data to hash
@@ -132,8 +128,9 @@ extern void sha256_set(sha256_ctx */*ctx*/, const void */*buf*/,
 
 extern void sha256_hash(sha256_ctx */*ctx*/,
 			const void */*buf*/, size_t /*sz*/);
+#define sha224_hash sha256_hash
 
-/* --- @sha256_done@ --- *
+/* --- @sha256_done@, @sha224_done@ --- *
  *
  * Arguments:	@sha256_ctx *ctx@ = pointer to context block
  *		@void *hash@ = pointer to output buffer
@@ -144,8 +141,9 @@ extern void sha256_hash(sha256_ctx */*ctx*/,
  */
 
 extern void sha256_done(sha256_ctx */*ctx*/, void */*hash*/);
+extern void sha224_done(sha256_ctx */*ctx*/, void */*hash*/);
 
-/* --- @sha256_state@ --- *
+/* --- @sha256_state@, @sha224_state@ --- *
  *
  * Arguments:	@sha256_ctx *ctx@ = pointer to context
  *		@void *state@ = pointer to buffer for current state
@@ -157,10 +155,12 @@ extern void sha256_done(sha256_ctx */*ctx*/, void */*hash*/);
  */
 
 extern unsigned long sha256_state(sha256_ctx */*ctx*/, void */*state*/);
+#define sha224_state sha256_state
 
 /*----- Generic hash interface --------------------------------------------*/
 
 extern const gchash sha256;
+extern const gchash sha224;
 
 /*----- That's all, folks -------------------------------------------------*/