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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>
233 lines
7.9 KiB
C
233 lines
7.9 KiB
C
/**
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* \file sha1.h
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*
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* \brief This file contains SHA-1 definitions and functions.
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*
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* The Secure Hash Algorithm 1 (SHA-1) cryptographic hash function is defined in
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* <em>FIPS 180-4: Secure Hash Standard (SHS)</em>.
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*
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* \warning SHA-1 is considered a weak message digest and its use constitutes
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* a security risk. We recommend considering stronger message
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* digests instead.
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBEDTLS_SHA1_H
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#define MBEDTLS_SHA1_H
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#include "mbedtls/private_access.h"
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#include "mbedtls/build_info.h"
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#include <stddef.h>
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#include <stdint.h>
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/** SHA-1 input data was malformed. */
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#define MBEDTLS_ERR_SHA1_BAD_INPUT_DATA -0x0073
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !defined(MBEDTLS_SHA1_ALT)
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// Regular implementation
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//
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/**
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* \brief The SHA-1 context structure.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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typedef struct mbedtls_sha1_context
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{
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uint32_t MBEDTLS_PRIVATE(total)[2]; /*!< The number of Bytes processed. */
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uint32_t MBEDTLS_PRIVATE(state)[5]; /*!< The intermediate digest state. */
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unsigned char MBEDTLS_PRIVATE(buffer)[64]; /*!< The data block being processed. */
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}
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mbedtls_sha1_context;
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#else /* MBEDTLS_SHA1_ALT */
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#include "sha1_alt.h"
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#endif /* MBEDTLS_SHA1_ALT */
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/**
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* \brief This function initializes a SHA-1 context.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param ctx The SHA-1 context to initialize.
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* This must not be \c NULL.
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*
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*/
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void mbedtls_sha1_init( mbedtls_sha1_context *ctx );
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/**
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* \brief This function clears a SHA-1 context.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param ctx The SHA-1 context to clear. This may be \c NULL,
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* in which case this function does nothing. If it is
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* not \c NULL, it must point to an initialized
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* SHA-1 context.
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*
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*/
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void mbedtls_sha1_free( mbedtls_sha1_context *ctx );
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/**
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* \brief This function clones the state of a SHA-1 context.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param dst The SHA-1 context to clone to. This must be initialized.
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* \param src The SHA-1 context to clone from. This must be initialized.
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*
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*/
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void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
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const mbedtls_sha1_context *src );
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/**
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* \brief This function starts a SHA-1 checksum calculation.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param ctx The SHA-1 context to initialize. This must be initialized.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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*
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*/
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int mbedtls_sha1_starts( mbedtls_sha1_context *ctx );
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/**
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* \brief This function feeds an input buffer into an ongoing SHA-1
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* checksum calculation.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param ctx The SHA-1 context. This must be initialized
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* and have a hash operation started.
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* \param input The buffer holding the input data.
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* This must be a readable buffer of length \p ilen Bytes.
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* \param ilen The length of the input data \p input in Bytes.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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*/
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int mbedtls_sha1_update( mbedtls_sha1_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-1 operation, and writes
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* the result to the output buffer.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param ctx The SHA-1 context to use. This must be initialized and
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* have a hash operation started.
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* \param output The SHA-1 checksum result. This must be a writable
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* buffer of length \c 20 Bytes.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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*/
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int mbedtls_sha1_finish( mbedtls_sha1_context *ctx,
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unsigned char output[20] );
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/**
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* \brief SHA-1 process data block (internal use only).
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param ctx The SHA-1 context to use. This must be initialized.
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* \param data The data block being processed. This must be a
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* readable buffer of length \c 64 Bytes.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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*
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*/
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int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx,
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const unsigned char data[64] );
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/**
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* \brief This function calculates the SHA-1 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-1 result is calculated as
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* output = SHA-1(input buffer).
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \param input The buffer holding the input data.
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* This must be a readable buffer of length \p ilen Bytes.
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* \param ilen The length of the input data \p input in Bytes.
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* \param output The SHA-1 checksum result.
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* This must be a writable buffer of length \c 20 Bytes.
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*
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* \return \c 0 on success.
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* \return A negative error code on failure.
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*
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*/
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int mbedtls_sha1( const unsigned char *input,
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size_t ilen,
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unsigned char output[20] );
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#if defined(MBEDTLS_SELF_TEST)
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/**
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* \brief The SHA-1 checkup routine.
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*
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* \warning SHA-1 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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* \return \c 0 on success.
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* \return \c 1 on failure.
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*
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*/
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int mbedtls_sha1_self_test( int verbose );
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#endif /* MBEDTLS_SELF_TEST */
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#ifdef __cplusplus
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}
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#endif
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#endif /* mbedtls_sha1.h */
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