119 lines
3.8 KiB
C
119 lines
3.8 KiB
C
/* sha1.h */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file sha1.h
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* \author Daniel Otte
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* \email daniel.otte@rub.de
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* \date 2006-10-08
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* \license GPLv3 or later
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* \brief SHA-1 declaration.
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* \ingroup SHA-1
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*
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*/
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#ifndef SHA1_H_
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#define SHA1_H_
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#include <stdint.h>
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/** \def SHA1_HASH_BITS
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* definees the size of a SHA-1 hash in bits
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*/
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/** \def SHA1_HASH_BYTES
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* definees the size of a SHA-1 hash in bytes
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*/
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/** \def SHA1_BLOCK_BITS
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* definees the size of a SHA-1 input block in bits
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*/
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/** \def SHA1_BLOCK_BYTES
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* definees the size of a SHA-1 input block in bytes
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*/
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#define SHA1_HASH_BITS 160
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#define SHA1_HASH_BYTES (SHA1_HASH_BITS/8)
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#define SHA1_BLOCK_BITS 512
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#define SHA1_BLOCK_BYTES (SHA1_BLOCK_BITS/8)
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/** \typedef sha1_ctx_t
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* \brief SHA-1 context type
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*
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* A vatiable of this type may hold the state of a SHA-1 hashing process
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*/
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typedef struct {
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uint32_t h[5];
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uint64_t length;
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} sha1_ctx_t;
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/** \typedef sha1_hash_t
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* \brief hash value type
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* A variable of this type may hold a SHA-1 hash value
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*/
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/*
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typedef uint8_t sha1_hash_t[SHA1_HASH_BITS/8];
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*/
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/** \fn sha1_init(sha1_ctx_t *state)
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* \brief initializes a SHA-1 context
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* This function sets a ::sha1_ctx_t variable to the initialization vector
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* for SHA-1 hashing.
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* \param state pointer to the SHA-1 context variable
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*/
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void sha1_init(sha1_ctx_t *state);
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/** \fn sha1_nextBlock(sha1_ctx_t *state, const void* block)
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* \brief process one input block
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* This function processes one input block and updates the hash context
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* accordingly
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* \param state pointer to the state variable to update
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* \param block pointer to the message block to process
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*/
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void sha1_nextBlock (sha1_ctx_t *state, const void* block);
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/** \fn sha1_lastBlock(sha1_ctx_t *state, const void* block, uint16_t length_b)
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* \brief processes the given block and finalizes the context
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* This function processes the last block in a SHA-1 hashing process.
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* The block should have a maximum length of a single input block.
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* \param state pointer to the state variable to update and finalize
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* \param block pointer to themessage block to process
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* \param length_b length of the message block in bits
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*/
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void sha1_lastBlock (sha1_ctx_t *state, const void* block, uint16_t length_b);
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/** \fn sha1_ctx2hash(sha1_hash_t *dest, sha1_ctx_t *state)
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* \brief convert a state variable into an actual hash value
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* Writes the hash value corresponding to the state to the memory pointed by dest.
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* \param dest pointer to the hash value destination
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* \param state pointer to the hash context
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*/
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void sha1_ctx2hash (void *dest, sha1_ctx_t *state);
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/** \fn sha1(sha1_hash_t *dest, const void* msg, uint32_t length_b)
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* \brief hashing a message which in located entirely in RAM
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* This function automatically hashes a message which is entirely in RAM with
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* the SHA-1 hashing algorithm.
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* \param dest pointer to the hash value destination
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* \param msg pointer to the message which should be hashed
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* \param length_b length of the message in bits
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*/
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void sha1(void *dest, const void* msg, uint32_t length_b);
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#endif /*SHA1_H_*/
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