2014-07-02 00:16:44 +04:00
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/* poly1305.h
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*
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* Copyright (C) 2006-2014 wolfSSL Inc.
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifdef HAVE_POLY1305
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#ifndef CTAO_CRYPT_POLY1305_H
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#define CTAO_CRYPT_POLY1305_H
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#include <cyassl/ctaocrypt/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* auto detect between 32bit / 64bit */
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#define HAS_SIZEOF_INT128_64BIT (defined(__SIZEOF_INT128__) && defined(__LP64__))
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#define HAS_MSVC_64BIT (defined(_MSC_VER) && defined(_M_X64))
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2014-07-25 04:59:39 +04:00
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#define HAS_GCC_4_4_64BIT (defined(__GNUC__) && defined(__LP64__) && \
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((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 4))))
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2014-07-02 00:16:44 +04:00
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#if (HAS_SIZEOF_INT128_64BIT || HAS_MSVC_64BIT || HAS_GCC_4_4_64BIT)
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#define POLY130564
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#else
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#define POLY130532
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#endif
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enum {
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POLY1305 = 7,
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POLY1305_BLOCK_SIZE = 16,
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POLY1305_DIGEST_SIZE = 16,
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POLY1305_PAD_SIZE = 56
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};
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/* Poly1305 state */
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typedef struct Poly1305 {
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2014-07-10 01:48:40 +04:00
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#if defined(POLY130564)
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2014-07-02 00:16:44 +04:00
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word64 r[3];
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word64 h[3];
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word64 pad[2];
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#else
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word32 r[5];
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word32 h[5];
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word32 pad[4];
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2014-07-10 01:48:40 +04:00
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#endif
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2014-07-02 00:16:44 +04:00
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size_t leftover;
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unsigned char buffer[POLY1305_BLOCK_SIZE];
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unsigned char final;
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} Poly1305;
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/* does init */
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CYASSL_API int Poly1305SetKey(Poly1305* poly1305, const byte* key, word32 kySz);
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CYASSL_API int Poly1305Update(Poly1305* poly1305, const byte*, word32);
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CYASSL_API int Poly1305Final(Poly1305* poly1305, byte* tag);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* CTAO_CRYPT_POLY1305_H */
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#endif /* HAVE_POLY1305 */
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