X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=sha1.h;h=6675d20a19182997addf152717d2f5dd44b19974;hb=b5a057d2dfa6b43f3850b3858c11a079eb9086f0;hp=4f54d88a08d9ebb9bc66b10d87c2500fc40af8bb;hpb=6e51024d966bd015cb8f9c8460c5c21da6a08f9e;p=avr-crypto-lib.git
diff --git a/sha1.h b/sha1.h
index 4f54d88..6675d20 100644
--- a/sha1.h
+++ b/sha1.h
@@ -1,10 +1,29 @@
+/* sha1.h */
+/*
+ This file is part of the AVR-Crypto-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 .
+*/
/**
- * \file sha1.c
+ * \file sha1.h
* \author Daniel Otte
- * \date 08.10.2006
- * \par License:
- * GPL
- * \brief SHA-1 declaration.
+ * \email daniel.otte@rub.de
+ * \date 2006-10-08
+ * \license GPLv3 or later
+ * \brief SHA-1 declaration.
+ * \ingroup SHA-1
*
*/
@@ -12,31 +31,86 @@
#define SHA1_H_
#include
+/** \def SHA1_HASH_BITS
+ * definees the size of a SHA-1 hash in bits
+ */
+/** \def SHA1_HASH_BYTES
+ * definees the size of a SHA-1 hash in bytes
+ */
+
+/** \def SHA1_BLOCK_BITS
+ * definees the size of a SHA-1 input block in bits
+ */
+/** \def SHA1_BLOCK_BYTES
+ * definees the size of a SHA-1 input block in bytes
+ */
#define SHA1_HASH_BITS 160
+#define SHA1_HASH_BYTES (SHA1_HASH_BITS/8)
#define SHA1_BLOCK_BITS 512
+#define SHA1_BLOCK_BYTES (SHA1_BLOCK_BITS/8)
-/**
+/** \typedef sha1_ctx_t
* \brief SHA-1 context type
*
+ * A vatiable of this type may hold the state of a SHA-1 hashing process
*/
typedef struct {
uint32_t h[5];
uint64_t length;
} sha1_ctx_t;
+/** \typedef sha1_hash_t
+ * \brief hash value type
+ * A variable of this type may hold a SHA-1 hash value
+ */
typedef uint8_t sha1_hash_t[SHA1_HASH_BITS/8];
+/** \fn sha1_init(sha1_ctx_t *state)
+ * \brief initializes a SHA-1 context
+ * This function sets a ::sha1_ctx_t variable to the initialization vector
+ * for SHA-1 hashing.
+ * \param state pointer to the SHA-1 context variable
+ */
void sha1_init(sha1_ctx_t *state);
-void sha1_nextBlock (sha1_ctx_t *state, void* block);
-void sha1_lastBlock (sha1_ctx_t *state, void* block, uint16_t length);
+/** \fn sha1_nextBlock(sha1_ctx_t *state, const void* block)
+ * \brief process one input block
+ * This function processes one input block and updates the hash context
+ * accordingly
+ * \param state pointer to the state variable to update
+ * \param block pointer to the message block to process
+ */
+void sha1_nextBlock (sha1_ctx_t *state, const void* block);
+
+/** \fn sha1_lastBlock(sha1_ctx_t *state, const void* block, uint16_t length_b)
+ * \brief processes the given block and finalizes the context
+ * This function processes the last block in a SHA-1 hashing process.
+ * The block should have a maximum length of a single input block.
+ * \param state pointer to the state variable to update and finalize
+ * \param block pointer to themessage block to process
+ * \param length_b length of the message block in bits
+ */
+void sha1_lastBlock (sha1_ctx_t *state, const void* block, uint16_t length_b);
+/** \fn sha1_ctx2hash(sha1_hash_t *dest, sha1_ctx_t *state)
+ * \brief convert a state variable into an actual hash value
+ * Writes the hash value corresponding to the state to the memory pointed by dest.
+ * \param dest pointer to the hash value destination
+ * \param state pointer to the hash context
+ */
void sha1_ctx2hash (sha1_hash_t *dest, sha1_ctx_t *state);
-void sha1 (sha1_hash_t *dest, void* msg, uint32_t length);
-//uint32_t change_endian32(uint32_t x);
+/** \fn sha1(sha1_hash_t *dest, const void* msg, uint32_t length_b)
+ * \brief hashing a message which in located entirely in RAM
+ * This function automatically hashes a message which is entirely in RAM with
+ * the SHA-1 hashing algorithm.
+ * \param dest pointer to the hash value destination
+ * \param msg pointer to the message which should be hashed
+ * \param length_b length of the message in bits
+ */
+void sha1(sha1_hash_t *dest, const void* msg, uint32_t length_b);