235 lines
9.6 KiB
C
235 lines
9.6 KiB
C
/*
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* PSA hashing layer on top of Mbed TLS software crypto
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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 PSA_CRYPTO_HASH_H
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#define PSA_CRYPTO_HASH_H
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#include <psa/crypto.h>
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#include "md_wrap.h"
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/** Get Mbed TLS MD information of a hash algorithm given its PSA identifier
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*
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* \param[in] alg PSA hash algorithm identifier
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*
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* \return The Mbed TLS MD information of the hash algorithm. \c NULL if the
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* PSA hash algorithm is not supported.
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*/
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const mbedtls_md_info_t *mbedtls_md_info_from_psa( psa_algorithm_t alg );
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/** Calculate the hash (digest) of a message using Mbed TLS routines.
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*
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* \note The signature of this function is that of a PSA driver hash_compute
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* entry point. This function behaves as a hash_compute entry point as
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* defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* \param alg The hash algorithm to compute (\c PSA_ALG_XXX value
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* such that #PSA_ALG_IS_HASH(\p alg) is true).
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* \param[in] input Buffer containing the message to hash.
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* \param input_length Size of the \p input buffer in bytes.
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* \param[out] hash Buffer where the hash is to be written.
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* \param hash_size Size of the \p hash buffer in bytes.
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* \param[out] hash_length On success, the number of bytes
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* that make up the hash value. This is always
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* #PSA_HASH_LENGTH(\p alg).
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* \p alg is not supported
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* \p hash_size is too small
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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*/
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psa_status_t mbedtls_psa_hash_compute(
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psa_algorithm_t alg,
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const uint8_t *input,
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size_t input_length,
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uint8_t *hash,
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size_t hash_size,
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size_t *hash_length);
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/** Set up a multipart hash operation using Mbed TLS routines.
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*
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* \note The signature of this function is that of a PSA driver hash_setup
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* entry point. This function behaves as a hash_setup entry point as
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* defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* If an error occurs at any step after a call to mbedtls_psa_hash_setup(), the
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* operation will need to be reset by a call to mbedtls_psa_hash_abort(). The
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* core may call mbedtls_psa_hash_abort() at any time after the operation
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* has been initialized.
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*
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* After a successful call to mbedtls_psa_hash_setup(), the core must
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* eventually terminate the operation. The following events terminate an
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* operation:
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* - A successful call to mbedtls_psa_hash_finish() or mbedtls_psa_hash_verify().
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* - A call to mbedtls_psa_hash_abort().
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*
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* \param[in,out] operation The operation object to set up. It must have
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* been initialized to all-zero and not yet be in use.
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* \param alg The hash algorithm to compute (\c PSA_ALG_XXX value
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* such that #PSA_ALG_IS_HASH(\p alg) is true).
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_NOT_SUPPORTED
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* \p alg is not supported
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* \retval #PSA_ERROR_BAD_STATE
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* The operation state is not valid (it must be inactive).
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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*/
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psa_status_t mbedtls_psa_hash_setup(
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mbedtls_psa_hash_operation_t *operation,
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psa_algorithm_t alg );
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/** Clone an Mbed TLS hash operation.
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*
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* \note The signature of this function is that of a PSA driver hash_clone
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* entry point. This function behaves as a hash_clone entry point as
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* defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* This function copies the state of an ongoing hash operation to
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* a new operation object. In other words, this function is equivalent
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* to calling mbedtls_psa_hash_setup() on \p target_operation with the same
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* algorithm that \p source_operation was set up for, then
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* mbedtls_psa_hash_update() on \p target_operation with the same input that
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* that was passed to \p source_operation. After this function returns, the
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* two objects are independent, i.e. subsequent calls involving one of
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* the objects do not affect the other object.
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*
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* \param[in] source_operation The active hash operation to clone.
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* \param[in,out] target_operation The operation object to set up.
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* It must be initialized but not active.
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*
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* \retval #PSA_SUCCESS
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* \retval #PSA_ERROR_BAD_STATE
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* The \p source_operation state is not valid (it must be active).
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* \retval #PSA_ERROR_BAD_STATE
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* The \p target_operation state is not valid (it must be inactive).
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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*/
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psa_status_t mbedtls_psa_hash_clone(
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const mbedtls_psa_hash_operation_t *source_operation,
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mbedtls_psa_hash_operation_t *target_operation );
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/** Add a message fragment to a multipart Mbed TLS hash operation.
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*
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* \note The signature of this function is that of a PSA driver hash_update
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* entry point. This function behaves as a hash_update entry point as
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* defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* The application must call mbedtls_psa_hash_setup() before calling this function.
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*
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* If this function returns an error status, the operation enters an error
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* state and must be aborted by calling mbedtls_psa_hash_abort().
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*
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* \param[in,out] operation Active hash operation.
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* \param[in] input Buffer containing the message fragment to hash.
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* \param input_length Size of the \p input buffer in bytes.
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_BAD_STATE
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* The operation state is not valid (it must be active).
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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*/
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psa_status_t mbedtls_psa_hash_update(
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mbedtls_psa_hash_operation_t *operation,
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const uint8_t *input,
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size_t input_length );
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/** Finish the calculation of the Mbed TLS-calculated hash of a message.
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*
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* \note The signature of this function is that of a PSA driver hash_finish
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* entry point. This function behaves as a hash_finish entry point as
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* defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* The application must call mbedtls_psa_hash_setup() before calling this function.
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* This function calculates the hash of the message formed by concatenating
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* the inputs passed to preceding calls to mbedtls_psa_hash_update().
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*
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* When this function returns successfuly, the operation becomes inactive.
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* If this function returns an error status, the operation enters an error
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* state and must be aborted by calling mbedtls_psa_hash_abort().
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*
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* \param[in,out] operation Active hash operation.
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* \param[out] hash Buffer where the hash is to be written.
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* \param hash_size Size of the \p hash buffer in bytes.
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* \param[out] hash_length On success, the number of bytes
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* that make up the hash value. This is always
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* #PSA_HASH_LENGTH(\c alg) where \c alg is the
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* hash algorithm that is calculated.
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*
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* \retval #PSA_SUCCESS
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* Success.
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* \retval #PSA_ERROR_BAD_STATE
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* The operation state is not valid (it must be active).
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of the \p hash buffer is too small. You can determine a
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* sufficient buffer size by calling #PSA_HASH_LENGTH(\c alg)
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* where \c alg is the hash algorithm that is calculated.
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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*/
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psa_status_t mbedtls_psa_hash_finish(
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mbedtls_psa_hash_operation_t *operation,
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uint8_t *hash,
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size_t hash_size,
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size_t *hash_length );
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/** Abort an Mbed TLS hash operation.
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*
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* \note The signature of this function is that of a PSA driver hash_abort
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* entry point. This function behaves as a hash_abort entry point as
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* defined in the PSA driver interface specification for transparent
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* drivers.
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*
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* Aborting an operation frees all associated resources except for the
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* \p operation structure itself. Once aborted, the operation object
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* can be reused for another operation by calling
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* mbedtls_psa_hash_setup() again.
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*
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* You may call this function any time after the operation object has
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* been initialized by one of the methods described in #psa_hash_operation_t.
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*
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* In particular, calling mbedtls_psa_hash_abort() after the operation has been
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* terminated by a call to mbedtls_psa_hash_abort(), mbedtls_psa_hash_finish() or
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* mbedtls_psa_hash_verify() is safe and has no effect.
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*
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* \param[in,out] operation Initialized hash operation.
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*
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* \retval #PSA_SUCCESS
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* \retval #PSA_ERROR_CORRUPTION_DETECTED
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*/
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psa_status_t mbedtls_psa_hash_abort(
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mbedtls_psa_hash_operation_t *operation );
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#endif /* PSA_CRYPTO_HASH_H */
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