d297157fe8
Now that descriptions of error codes no longer have to be on the same line for the sake of generate_errors.pl, move them to their own line before the definition. This aligns them with what we do for other definitions, and means that we no longer need to have very long lines containing both the C definition and the comment. ``` perl -i -pe 's~^(#define +MBEDTLS_ERR_\w+ +-\w+) */\*[*!]<(.*)\*/~/**$2*/\n$1~' include/mbedtls/*.h ``` This commit does not change the output of generate_errors.pl. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
192 lines
6.6 KiB
C
192 lines
6.6 KiB
C
/**
|
|
* \file sha256.h
|
|
*
|
|
* \brief This file contains SHA-224 and SHA-256 definitions and functions.
|
|
*
|
|
* The Secure Hash Algorithms 224 and 256 (SHA-224 and SHA-256) cryptographic
|
|
* hash functions are defined in <em>FIPS 180-4: Secure Hash Standard (SHS)</em>.
|
|
*/
|
|
/*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
#ifndef MBEDTLS_SHA256_H
|
|
#define MBEDTLS_SHA256_H
|
|
#include "mbedtls/private_access.h"
|
|
|
|
#include "mbedtls/build_info.h"
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
/** SHA-256 input data was malformed. */
|
|
#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA -0x0074
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_SHA256_ALT)
|
|
// Regular implementation
|
|
//
|
|
|
|
/**
|
|
* \brief The SHA-256 context structure.
|
|
*
|
|
* The structure is used both for SHA-256 and for SHA-224
|
|
* checksum calculations. The choice between these two is
|
|
* made in the call to mbedtls_sha256_starts().
|
|
*/
|
|
typedef struct mbedtls_sha256_context
|
|
{
|
|
uint32_t MBEDTLS_PRIVATE(total)[2]; /*!< The number of Bytes processed. */
|
|
uint32_t MBEDTLS_PRIVATE(state)[8]; /*!< The intermediate digest state. */
|
|
unsigned char MBEDTLS_PRIVATE(buffer)[64]; /*!< The data block being processed. */
|
|
int MBEDTLS_PRIVATE(is224); /*!< Determines which function to use:
|
|
0: Use SHA-256, or 1: Use SHA-224. */
|
|
}
|
|
mbedtls_sha256_context;
|
|
|
|
#else /* MBEDTLS_SHA256_ALT */
|
|
#include "sha256_alt.h"
|
|
#endif /* MBEDTLS_SHA256_ALT */
|
|
|
|
/**
|
|
* \brief This function initializes a SHA-256 context.
|
|
*
|
|
* \param ctx The SHA-256 context to initialize. This must not be \c NULL.
|
|
*/
|
|
void mbedtls_sha256_init( mbedtls_sha256_context *ctx );
|
|
|
|
/**
|
|
* \brief This function clears a SHA-256 context.
|
|
*
|
|
* \param ctx The SHA-256 context to clear. This may be \c NULL, in which
|
|
* case this function returns immediately. If it is not \c NULL,
|
|
* it must point to an initialized SHA-256 context.
|
|
*/
|
|
void mbedtls_sha256_free( mbedtls_sha256_context *ctx );
|
|
|
|
/**
|
|
* \brief This function clones the state of a SHA-256 context.
|
|
*
|
|
* \param dst The destination context. This must be initialized.
|
|
* \param src The context to clone. This must be initialized.
|
|
*/
|
|
void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
|
|
const mbedtls_sha256_context *src );
|
|
|
|
/**
|
|
* \brief This function starts a SHA-224 or SHA-256 checksum
|
|
* calculation.
|
|
*
|
|
* \param ctx The context to use. This must be initialized.
|
|
* \param is224 This determines which function to use. This must be
|
|
* either \c 0 for SHA-256, or \c 1 for SHA-224.
|
|
*
|
|
* \return \c 0 on success.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 );
|
|
|
|
/**
|
|
* \brief This function feeds an input buffer into an ongoing
|
|
* SHA-256 checksum calculation.
|
|
*
|
|
* \param ctx The SHA-256 context. This must be initialized
|
|
* and have a hash operation started.
|
|
* \param input The buffer holding the data. This must be a readable
|
|
* buffer of length \p ilen Bytes.
|
|
* \param ilen The length of the input data in Bytes.
|
|
*
|
|
* \return \c 0 on success.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_sha256_update( mbedtls_sha256_context *ctx,
|
|
const unsigned char *input,
|
|
size_t ilen );
|
|
|
|
/**
|
|
* \brief This function finishes the SHA-256 operation, and writes
|
|
* the result to the output buffer.
|
|
*
|
|
* \param ctx The SHA-256 context. This must be initialized
|
|
* and have a hash operation started.
|
|
* \param output The SHA-224 or SHA-256 checksum result.
|
|
* This must be a writable buffer of length \c 32 bytes
|
|
* for SHA-256, \c 28 bytes for SHA-224.
|
|
*
|
|
* \return \c 0 on success.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_sha256_finish( mbedtls_sha256_context *ctx,
|
|
unsigned char *output );
|
|
|
|
/**
|
|
* \brief This function processes a single data block within
|
|
* the ongoing SHA-256 computation. This function is for
|
|
* internal use only.
|
|
*
|
|
* \param ctx The SHA-256 context. This must be initialized.
|
|
* \param data The buffer holding one block of data. This must
|
|
* be a readable buffer of length \c 64 Bytes.
|
|
*
|
|
* \return \c 0 on success.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
|
|
const unsigned char data[64] );
|
|
|
|
/**
|
|
* \brief This function calculates the SHA-224 or SHA-256
|
|
* checksum of a buffer.
|
|
*
|
|
* The function allocates the context, performs the
|
|
* calculation, and frees the context.
|
|
*
|
|
* The SHA-256 result is calculated as
|
|
* output = SHA-256(input buffer).
|
|
*
|
|
* \param input The buffer holding the data. This must be a readable
|
|
* buffer of length \p ilen Bytes.
|
|
* \param ilen The length of the input data in Bytes.
|
|
* \param output The SHA-224 or SHA-256 checksum result.
|
|
* This must be a writable buffer of length \c 32 bytes
|
|
* for SHA-256, \c 28 bytes for SHA-224.
|
|
* \param is224 Determines which function to use. This must be
|
|
* either \c 0 for SHA-256, or \c 1 for SHA-224.
|
|
*/
|
|
int mbedtls_sha256( const unsigned char *input,
|
|
size_t ilen,
|
|
unsigned char *output,
|
|
int is224 );
|
|
|
|
#if defined(MBEDTLS_SELF_TEST)
|
|
|
|
/**
|
|
* \brief The SHA-224 and SHA-256 checkup routine.
|
|
*
|
|
* \return \c 0 on success.
|
|
* \return \c 1 on failure.
|
|
*/
|
|
int mbedtls_sha256_self_test( int verbose );
|
|
|
|
#endif /* MBEDTLS_SELF_TEST */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* mbedtls_sha256.h */
|