/** * \file sha2.h * * \brief SHA-224 and SHA-256 cryptographic hash function * * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * * This file is part of mbed TLS (https://polarssl.org) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef POLARSSL_SHA2_H #define POLARSSL_SHA2_H #include "config.h" #include #ifdef _MSC_VER #include typedef UINT32 uint32_t; #else #include #endif #define POLARSSL_ERR_SHA2_FILE_IO_ERROR -0x0078 /**< Read/write error in file. */ #if !defined(POLARSSL_SHA2_ALT) // Regular implementation // /** * \brief SHA-256 context structure */ typedef struct { uint32_t total[2]; /*!< number of bytes processed */ uint32_t state[8]; /*!< intermediate digest state */ unsigned char buffer[64]; /*!< data block being processed */ unsigned char ipad[64]; /*!< HMAC: inner padding */ unsigned char opad[64]; /*!< HMAC: outer padding */ int is224; /*!< 0 => SHA-256, else SHA-224 */ } sha2_context; #ifdef __cplusplus extern "C" { #endif /** * \brief SHA-256 context setup * * \param ctx context to be initialized * \param is224 0 = use SHA256, 1 = use SHA224 */ void sha2_starts( sha2_context *ctx, int is224 ); /** * \brief SHA-256 process buffer * * \param ctx SHA-256 context * \param input buffer holding the data * \param ilen length of the input data */ void sha2_update( sha2_context *ctx, const unsigned char *input, size_t ilen ); /** * \brief SHA-256 final digest * * \param ctx SHA-256 context * \param output SHA-224/256 checksum result */ void sha2_finish( sha2_context *ctx, unsigned char output[32] ); /* Internal use */ void sha2_process( sha2_context *ctx, const unsigned char data[64] ); #ifdef __cplusplus } #endif #else /* POLARSSL_SHA2_ALT */ #include "sha2_alt.h" #endif /* POLARSSL_SHA2_ALT */ #ifdef __cplusplus extern "C" { #endif /** * \brief Output = SHA-256( input buffer ) * * \param input buffer holding the data * \param ilen length of the input data * \param output SHA-224/256 checksum result * \param is224 0 = use SHA256, 1 = use SHA224 */ void sha2( const unsigned char *input, size_t ilen, unsigned char output[32], int is224 ); /** * \brief Output = SHA-256( file contents ) * * \param path input file name * \param output SHA-224/256 checksum result * \param is224 0 = use SHA256, 1 = use SHA224 * * \return 0 if successful, or POLARSSL_ERR_SHA2_FILE_IO_ERROR */ int sha2_file( const char *path, unsigned char output[32], int is224 ); /** * \brief SHA-256 HMAC context setup * * \param ctx HMAC context to be initialized * \param key HMAC secret key * \param keylen length of the HMAC key * \param is224 0 = use SHA256, 1 = use SHA224 */ void sha2_hmac_starts( sha2_context *ctx, const unsigned char *key, size_t keylen, int is224 ); /** * \brief SHA-256 HMAC process buffer * * \param ctx HMAC context * \param input buffer holding the data * \param ilen length of the input data */ void sha2_hmac_update( sha2_context *ctx, const unsigned char *input, size_t ilen ); /** * \brief SHA-256 HMAC final digest * * \param ctx HMAC context * \param output SHA-224/256 HMAC checksum result */ void sha2_hmac_finish( sha2_context *ctx, unsigned char output[32] ); /** * \brief SHA-256 HMAC context reset * * \param ctx HMAC context to be reset */ void sha2_hmac_reset( sha2_context *ctx ); /** * \brief Output = HMAC-SHA-256( hmac key, input buffer ) * * \param key HMAC secret key * \param keylen length of the HMAC key * \param input buffer holding the data * \param ilen length of the input data * \param output HMAC-SHA-224/256 result * \param is224 0 = use SHA256, 1 = use SHA224 */ void sha2_hmac( const unsigned char *key, size_t keylen, const unsigned char *input, size_t ilen, unsigned char output[32], int is224 ); /** * \brief Checkup routine * * \return 0 if successful, or 1 if the test failed */ int sha2_self_test( int verbose ); #ifdef __cplusplus } #endif #endif /* sha2.h */