X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=sha256.h;h=b76aa5f40c46acb7d90bb6aec3b862e1fef8ef96;hb=96ebafd201c9e8441c7677577b24aa402c1defc6;hp=80970ff3a9f03cf1bbc02ff24f8424a8947728e9;hpb=3c995d0a8faeb9d37927d48e20fc45d839e066ea;p=avr-crypto-lib.git

diff --git a/sha256.h b/sha256.h
index 80970ff..b76aa5f 100644
--- a/sha256.h
+++ b/sha256.h
@@ -1,8 +1,27 @@
+/* sha256.h */
+/*
+    This file is part of the Crypto-avr-lib/microcrypt-lib.
+    Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
 /**
- * File:		sha256.h
- * Author:	Daniel Otte 
- * Date:		16.05.2006
- * License:	GPL
+ * \file		sha256-asm.h
+ * \author		Daniel Otte 
+ * \date		2006-05-16
+ * \par License	
+ * GPL
  * 
  */
 
@@ -18,6 +37,10 @@
 #define SHA256_HASH_BITS  256
 #define SHA256_BLOCK_BITS 512
 
+/**
+ * \brief sha256 context type
+ * 
+ */
 typedef struct {
 	uint32_t h[8];
 	uint64_t length;
@@ -26,11 +49,16 @@ typedef struct {
 typedef uint8_t sha256_hash_t[SHA256_HASH_BITS/8];
 
 void sha256_init(sha256_ctx_t *state);
-void sha256_nextBlock (sha256_ctx_t *state, void* block);
-void sha256_lastBlock(sha256_ctx_t *state, void* block, uint16_t length);
 
-void sha256_ctx2hash(sha256_hash_t *dest, sha256_ctx_t *state);
-void sha256(sha256_hash_t *dest, void* msg, uint32_t length);
+void sha256_nextBlock (sha256_ctx_t *state, const void* block);
+void sha256_lastBlock(sha256_ctx_t *state, const void* block, uint16_t length);
+
+void sha256_ctx2hash(sha256_hash_t *dest, const sha256_ctx_t *state);
+
+/*
+ * length in bits!
+ */
+void sha256(sha256_hash_t *dest, const void* msg, uint32_t length);
 uint32_t change_endian32(uint32_t x);