X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=sha256.h;h=ec1dac0045d73b61b37c486912d6010b94677cfe;hb=37d550b5d03ebe6cc51c6e7bbc897f9520ea7422;hp=5f2f275c5e8353eaa196f22e0012c594a059a92e;hpb=79c9a6582ba071646a3062175715f59ebe210603;p=avr-crypto-lib.git

diff --git a/sha256.h b/sha256.h
index 5f2f275..ec1dac0 100644
--- a/sha256.h
+++ b/sha256.h
@@ -1,3 +1,21 @@
+/* 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-asm.h
  * \author		Daniel Otte 
@@ -17,7 +35,9 @@
 
 
 #define SHA256_HASH_BITS  256
+#define SHA256_HASH_BYTES (SHA256_HASH_BITS/8)
 #define SHA256_BLOCK_BITS 512
+#define SHA256_BLOCK_BYTES (SHA256_BLOCK_BITS/8)
 
 /**
  * \brief sha256 context type
@@ -28,19 +48,19 @@ typedef struct {
 	uint64_t length;
 } sha256_ctx_t;
 
-typedef uint8_t sha256_hash_t[SHA256_HASH_BITS/8];
+typedef uint8_t sha256_hash_t[SHA256_HASH_BYTES];
 
 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_nextBlock (sha256_ctx_t *state, const void* block);
+void sha256_lastBlock(sha256_ctx_t *state, const void* block, uint16_t length_b);
 
-void sha256_ctx2hash(sha256_hash_t *dest, sha256_ctx_t *state);
+void sha256_ctx2hash(sha256_hash_t *dest, const sha256_ctx_t *state);
 
 /*
  * length in bits!
  */
-void sha256(sha256_hash_t *dest, void* msg, uint32_t length);
+void sha256(sha256_hash_t *dest, const void* msg, uint32_t length_b);
 uint32_t change_endian32(uint32_t x);