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104 lines
3 KiB
C
104 lines
3 KiB
C
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/*
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---------------------------------------------------------------------------
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Copyright (c) 2002, Dr Brian Gladman, Worcester, UK. All rights reserved.
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LICENSE TERMS
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The free distribution and use of this software in both source and binary
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form is allowed (with or without changes) provided that:
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1. distributions of this source code include the above copyright
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notice, this list of conditions and the following disclaimer;
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2. distributions in binary form include the above copyright
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notice, this list of conditions and the following disclaimer
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in the documentation and/or other associated materials;
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3. the copyright holder's name is not used to endorse products
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built using this software without specific written permission.
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ALTERNATIVELY, provided that this notice is retained in full, this product
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may be distributed under the terms of the GNU General Public License (GPL),
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in which case the provisions of the GPL apply INSTEAD OF those given above.
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DISCLAIMER
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This software is provided 'as is' with no explicit or implied warranties
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in respect of its properties, including, but not limited to, correctness
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and/or fitness for purpose.
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---------------------------------------------------------------------------
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Issue Date: 26/08/2003
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This is an implementation of HMAC, the FIPS standard keyed hash function
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*/
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#ifndef _HMAC_H
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#define _HMAC_H
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#include <memory.h>
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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#define USE_SHA1
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#if !defined(USE_SHA1) && !defined(USE_SHA256)
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#error define USE_SHA1 or USE_SHA256 to set the HMAC hash algorithm
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#endif
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#ifdef USE_SHA1
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#include "sha1.h"
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#define HASH_INPUT_SIZE SHA1_BLOCK_SIZE
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#define HASH_OUTPUT_SIZE SHA1_DIGEST_SIZE
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#define sha_ctx sha1_ctx
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#define sha_begin sha1_begin
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#define sha_hash sha1_hash
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#define sha_end sha1_end
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#endif
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#ifdef USE_SHA256
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#include "sha2.h"
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#define HASH_INPUT_SIZE SHA256_BLOCK_SIZE
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#define HASH_OUTPUT_SIZE SHA256_DIGEST_SIZE
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#define sha_ctx sha256_ctx
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#define sha_begin sha256_begin
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#define sha_hash sha256_hash
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#define sha_end sha256_end
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#endif
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#define HMAC_OK 0
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#define HMAC_BAD_MODE -1
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#define HMAC_IN_DATA 0xffffffff
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typedef struct
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{ unsigned char key[HASH_INPUT_SIZE];
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sha_ctx ctx[1];
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unsigned long klen;
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} hmac_ctx;
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void hmac_sha_begin(hmac_ctx cx[1]);
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int hmac_sha_key(const unsigned char key[], unsigned long key_len, hmac_ctx cx[1]);
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void hmac_sha_data(const unsigned char data[], unsigned long data_len, hmac_ctx cx[1]);
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void hmac_sha_end(unsigned char mac[], unsigned long mac_len, hmac_ctx cx[1]);
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void hmac_sha(const unsigned char key[], unsigned long key_len,
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const unsigned char data[], unsigned long data_len,
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unsigned char mac[], unsigned long mac_len);
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#if defined(__cplusplus)
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}
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#endif
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#endif
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