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281 lines
9.1 KiB
C
281 lines
9.1 KiB
C
/**
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* \file sha256.h
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*
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* \brief The SHA-224 and SHA-256 cryptographic hash function.
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*/
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/*
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* Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved
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* SPDX-License-Identifier: GPL-2.0
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*
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* This program 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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* This program 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* This file is part of Mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_SHA256_H
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#define MBEDTLS_SHA256_H
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#include <stddef.h>
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#include <stdint.h>
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#define MBEDTLS_ERR_SHA256_HW_ACCEL_FAILED -0x0037 /**< SHA-256 hardware accelerator failed */
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#if !defined(MBEDTLS_SHA256_ALT)
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// Regular implementation
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//
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief The SHA-256 context structure.
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*
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* The structure is used both for SHA-256 and for SHA-224
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* checksum calculations. The choice between these two is
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* made in the call to mbedtls_sha256_starts_ret().
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*/
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typedef struct
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{
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uint32_t total[2]; /*!< The number of Bytes processed. */
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uint32_t state[8]; /*!< The intermediate digest state. */
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unsigned char buffer[64]; /*!< The data block being processed. */
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int is224; /*!< Determines which function to use.
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<ul><li>0: Use SHA-256.</li>
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<li>1: Use SHA-224.</li></ul> */
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}
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mbedtls_sha256_context;
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/**
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* \brief This function initializes a SHA-256 context.
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*
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* \param ctx The SHA-256 context to initialize.
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*/
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void mbedtls_sha256_init( mbedtls_sha256_context *ctx );
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/**
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* \brief This function clears a SHA-256 context.
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*
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* \param ctx The SHA-256 context to clear.
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*/
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void mbedtls_sha256_free( mbedtls_sha256_context *ctx );
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/**
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* \brief This function clones the state of a SHA-256 context.
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*
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* \param dst The destination context.
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* \param src The context to clone.
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*/
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void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
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const mbedtls_sha256_context *src );
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/**
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* \brief This function starts a SHA-224 or SHA-256 checksum
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* calculation.
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*
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* \param ctx The context to initialize.
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* \param is224 Determines which function to use.
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* <ul><li>0: Use SHA-256.</li>
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* <li>1: Use SHA-224.</li></ul>
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*
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* \return \c 0 on success.
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*/
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int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 );
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/**
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* \brief This function feeds an input buffer into an ongoing
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* SHA-256 checksum calculation.
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*
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* \param ctx SHA-256 context
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* \param input buffer holding the data
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* \param ilen length of the input data
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*
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* \return \c 0 on success.
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*/
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int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
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const unsigned char *input,
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size_t ilen );
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/**
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* \brief This function finishes the SHA-256 operation, and writes
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* the result to the output buffer.
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*
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* \param ctx The SHA-256 context.
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* \param output The SHA-224 or SHA-256 checksum result.
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*
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* \return \c 0 on success.
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*/
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int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
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unsigned char output[32] );
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/**
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* \brief This function processes a single data block within
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* the ongoing SHA-256 computation. This function is for
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* internal use only.
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*
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* \param ctx The SHA-256 context.
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* \param data The buffer holding one block of data.
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*
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* \return \c 0 on success.
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*/
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int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
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const unsigned char data[64] );
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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#if defined(MBEDTLS_DEPRECATED_WARNING)
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#define MBEDTLS_DEPRECATED __attribute__((deprecated))
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#else
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#define MBEDTLS_DEPRECATED
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#endif
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/**
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* \brief This function starts a SHA-256 checksum calculation.
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*
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* \deprecated Superseded by mbedtls_sha256_starts_ret() in 2.7.0.
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*
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* \param ctx The SHA-256 context to initialize.
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* \param is224 Determines which function to use.
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* <ul><li>0: Use SHA-256.</li>
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* <li>1: Use SHA-224.</li></ul>
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*/
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MBEDTLS_DEPRECATED void mbedtls_sha256_starts( mbedtls_sha256_context *ctx,
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int is224 );
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/**
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* \brief This function feeds an input buffer into an ongoing
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* SHA-256 checksum calculation.
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*
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* \deprecated Superseded by mbedtls_sha256_update_ret() in 2.7.0.
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*
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* \param ctx The SHA-256 context to initialize.
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* \param input The buffer holding the data.
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* \param ilen The length of the input data.
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*/
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MBEDTLS_DEPRECATED void mbedtls_sha256_update( mbedtls_sha256_context *ctx,
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const unsigned char *input,
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size_t ilen );
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/**
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* \brief This function finishes the SHA-256 operation, and writes
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* the result to the output buffer.
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*
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* \deprecated Superseded by mbedtls_sha256_finish_ret() in 2.7.0.
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*
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* \param ctx The SHA-256 context.
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* \param output The SHA-224or SHA-256 checksum result.
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*/
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MBEDTLS_DEPRECATED void mbedtls_sha256_finish( mbedtls_sha256_context *ctx,
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unsigned char output[32] );
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/**
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* \brief This function processes a single data block within
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* the ongoing SHA-256 computation. This function is for
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* internal use only.
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*
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* \deprecated Superseded by mbedtls_internal_sha256_process() in 2.7.0.
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*
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* \param ctx The SHA-256 context.
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* \param data The buffer holding one block of data.
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*/
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MBEDTLS_DEPRECATED void mbedtls_sha256_process( mbedtls_sha256_context *ctx,
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const unsigned char data[64] );
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#undef MBEDTLS_DEPRECATED
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#endif /* !MBEDTLS_DEPRECATED_REMOVED */
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#ifdef __cplusplus
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}
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#endif
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#else /* MBEDTLS_SHA256_ALT */
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#include "sha256_alt.h"
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#endif /* MBEDTLS_SHA256_ALT */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief This function calculates the SHA-224 or SHA-256
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* checksum of a buffer.
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*
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* The function allocates the context, performs the
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* calculation, and frees the context.
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*
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* The SHA-256 result is calculated as
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* output = SHA-256(input buffer).
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*
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* \param input The buffer holding the input data.
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* \param ilen The length of the input data.
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* \param output The SHA-224 or SHA-256 checksum result.
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* \param is224 Determines which function to use.
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* <ul><li>0: Use SHA-256.</li>
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* <li>1: Use SHA-224.</li></ul>
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*/
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int mbedtls_sha256_ret( const unsigned char *input,
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size_t ilen,
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unsigned char output[32],
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int is224 );
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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#if defined(MBEDTLS_DEPRECATED_WARNING)
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#define MBEDTLS_DEPRECATED __attribute__((deprecated))
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#else
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#define MBEDTLS_DEPRECATED
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#endif
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/**
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* \brief This function calculates the SHA-224 or SHA-256 checksum
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* of a buffer.
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*
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* The function allocates the context, performs the
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* calculation, and frees the context.
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*
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* The SHA-256 result is calculated as
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* output = SHA-256(input buffer).
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*
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* \deprecated Superseded by mbedtls_sha256_ret() in 2.7.0.
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*
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* \param input The buffer holding the data.
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* \param ilen The length of the input data.
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* \param output The SHA-224 or SHA-256 checksum result.
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* \param is224 Determines which function to use.
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* <ul><li>0: Use SHA-256.</li>
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* <li>1: Use SHA-224.</li></ul>
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*/
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MBEDTLS_DEPRECATED void mbedtls_sha256( const unsigned char *input,
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size_t ilen,
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unsigned char output[32],
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int is224 );
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#undef MBEDTLS_DEPRECATED
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#endif /* !MBEDTLS_DEPRECATED_REMOVED */
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/**
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* \brief The SHA-224 and SHA-256 checkup routine.
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*
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* \return \c 0 on success, or \c 1 on failure.
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*/
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int mbedtls_sha256_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* mbedtls_sha256.h */
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