86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
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/* ctc_hmac.h
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*
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* Copyright (C) 2006-2011 Sawtooth Consulting Ltd.
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*
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* This file is part of CyaSSL.
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*
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* CyaSSL 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 2 of the License, or
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* (at your option) any later version.
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*
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* CyaSSL 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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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifndef NO_HMAC
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#ifndef CTAO_CRYPT_HMAC_H
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#define CTAO_CRYPT_HMAC_H
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#include "ctc_md5.h"
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#include "ctc_sha.h"
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#ifndef NO_SHA256
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#include "sha256.h"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum {
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IPAD = 0x36,
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OPAD = 0x5C,
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#ifndef NO_SHA256
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INNER_HASH_SIZE = SHA256_DIGEST_SIZE,
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#else
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INNER_HASH_SIZE = SHA_DIGEST_SIZE,
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SHA256 = 2, /* hash type unique */
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#endif
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HMAC_BLOCK_SIZE = MD5_BLOCK_SIZE
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};
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/* hash union */
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typedef union {
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Md5 md5;
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Sha sha;
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#ifndef NO_SHA256
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Sha256 sha256;
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#endif
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} Hash;
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/* Hmac digest */
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typedef struct Hmac {
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Hash hash;
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word32 ipad[HMAC_BLOCK_SIZE / sizeof(word32)]; /* same block size all*/
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word32 opad[HMAC_BLOCK_SIZE / sizeof(word32)];
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word32 innerHash[INNER_HASH_SIZE / sizeof(word32)]; /* max size */
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byte macType; /* md5 sha or sha256 */
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byte innerHashKeyed; /* keyed flag */
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} Hmac;
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void HmacSetKey(Hmac*, int type, const byte* key, word32 keySz); /* does init */
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void HmacUpdate(Hmac*, const byte*, word32);
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void HmacFinal(Hmac*, byte*);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* CTAO_CRYPT_HMAC_H */
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#endif /* NO_HMAC */
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