poly1305.h

00001 /* poly1305.h
00002  *
00003  * Copyright (C) 2006-2017 wolfSSL Inc.
00004  *
00005  * This file is part of wolfSSL.
00006  *
00007  * wolfSSL is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * wolfSSL is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
00020  */
00021 
00022 /*!
00023     \file wolfssl/wolfcrypt/poly1305.h
00024 */
00025 
00026 #ifndef WOLF_CRYPT_POLY1305_H
00027 #define WOLF_CRYPT_POLY1305_H
00028 
00029 #include <wolfcrypt/types.h>
00030 
00031 #ifdef HAVE_POLY1305
00032 
00033 #ifdef __cplusplus
00034     extern "C" {
00035 #endif
00036 
00037 /* auto detect between 32bit / 64bit */
00038 #if defined(__SIZEOF_INT128__) && defined(__LP64__)
00039 #define WC_HAS_SIZEOF_INT128_64BIT
00040 #endif
00041 
00042 #if defined(_MSC_VER) && defined(_M_X64)
00043 #define WC_HAS_MSVC_64BIT
00044 #endif
00045 
00046 #if (defined(__GNUC__) && defined(__LP64__) && \
00047         ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 4))))
00048 #define WC_HAS_GCC_4_4_64BIT
00049 #endif
00050 
00051 #ifdef USE_INTEL_SPEEDUP
00052 #elif (defined(WC_HAS_SIZEOF_INT128_64BIT) || defined(WC_HAS_MSVC_64BIT) ||  \
00053        defined(WC_HAS_GCC_4_4_64BIT))
00054 #define POLY130564
00055 #else
00056 #define POLY130532
00057 #endif
00058 
00059 enum {
00060     POLY1305 = 7,
00061     POLY1305_BLOCK_SIZE = 16,
00062     POLY1305_DIGEST_SIZE = 16,
00063 };
00064 
00065 #define WC_POLY1305_PAD_SZ 16
00066 #define WC_POLY1305_MAC_SZ 16
00067 
00068 /* Poly1305 state */
00069 typedef struct Poly1305 {
00070 #ifdef USE_INTEL_SPEEDUP
00071     word64 r[3];
00072     word64 h[3];
00073     word64 pad[2];
00074     word64 hh[20];
00075     word32 r1[8];
00076     word32 r2[8];
00077     word32 r3[8];
00078     word32 r4[8];
00079     word64 hm[16];
00080     unsigned char buffer[8*POLY1305_BLOCK_SIZE];
00081     size_t leftover;
00082     unsigned char finished;
00083     unsigned char started;
00084 #else
00085 #if defined(POLY130564)
00086     word64 r[3];
00087     word64 h[3];
00088     word64 pad[2];
00089 #else
00090     word32 r[5];
00091     word32 h[5];
00092     word32 pad[4];
00093 #endif
00094     size_t leftover;
00095     unsigned char buffer[POLY1305_BLOCK_SIZE];
00096     unsigned char finished;
00097 #endif
00098 } Poly1305;
00099 
00100 /* does init */
00101 
00102 WOLFSSL_API int wc_Poly1305SetKey(Poly1305* poly1305, const byte* key,
00103                                   word32 kySz);
00104 WOLFSSL_API int wc_Poly1305Update(Poly1305* poly1305, const byte*, word32);
00105 WOLFSSL_API int wc_Poly1305Final(Poly1305* poly1305, byte* tag);
00106 WOLFSSL_API int wc_Poly1305_MAC(Poly1305* ctx, byte* additional, word32 addSz,
00107                                byte* input, word32 sz, byte* tag, word32 tagSz);
00108 #ifdef __cplusplus
00109     } /* extern "C" */
00110 #endif
00111 
00112 #endif /* HAVE_POLY1305 */
00113 #endif /* WOLF_CRYPT_POLY1305_H */
00114 
00115