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265 lines
12 KiB
C
265 lines
12 KiB
C
/*
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* PSA MAC 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 OR GPL-2.0-or-later
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*/
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#ifndef PSA_CRYPTO_MAC_H
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#define PSA_CRYPTO_MAC_H
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#include <psa/crypto.h>
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/** Calculate the MAC (message authentication code) of a message using Mbed TLS.
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*
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* \note The signature of this function is that of a PSA driver mac_compute
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* entry point. This function behaves as a mac_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[in] attributes The attributes of the key to use for the
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* operation.
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* \param[in] key_buffer The buffer containing the key to use for
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* computing the MAC. This buffer contains the key
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* in export representation as defined by
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* psa_export_key() (i.e. the raw key bytes).
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* \param key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param alg The MAC algorithm to use (\c PSA_ALG_XXX value
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* such that #PSA_ALG_IS_MAC(\p alg) is true).
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* \param[in] input Buffer containing the input message.
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* \param input_length Size of the \p input buffer in bytes.
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* \param[out] mac Buffer where the MAC value is to be written.
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* \param mac_size Size of the \p mac buffer in bytes.
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* \param[out] mac_length On success, the number of bytes
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* that make up the MAC value.
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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 mac_size is too small
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_mac_compute(
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const psa_key_attributes_t *attributes,
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const uint8_t *key_buffer,
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size_t key_buffer_size,
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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 *mac,
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size_t mac_size,
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size_t *mac_length);
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/** Set up a multipart MAC calculation operation using Mbed TLS.
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*
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* \note The signature of this function is that of a PSA driver mac_sign_setup
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* entry point. This function behaves as a mac_sign_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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* \param[in,out] operation The operation object to set up. It must have
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* been initialized and not yet in use.
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* \param[in] attributes The attributes of the key to use for the
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* operation.
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* \param[in] key_buffer The buffer containing the key to use for
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* computing the MAC. This buffer contains the key
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* in export representation as defined by
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* psa_export_key() (i.e. the raw key bytes).
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* \param key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param alg The MAC algorithm to use (\c PSA_ALG_XXX value
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* such that #PSA_ALG_IS_MAC(\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_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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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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*/
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psa_status_t mbedtls_psa_mac_sign_setup(
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mbedtls_psa_mac_operation_t *operation,
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const psa_key_attributes_t *attributes,
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const uint8_t *key_buffer,
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size_t key_buffer_size,
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psa_algorithm_t alg);
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/** Set up a multipart MAC verification operation using Mbed TLS.
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*
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* \note The signature of this function is that of a PSA driver mac_verify_setup
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* entry point. This function behaves as a mac_verify_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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* \param[in,out] operation The operation object to set up. It must have
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* been initialized and not yet in use.
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* \param[in] attributes The attributes of the key to use for the
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* operation.
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* \param[in] key_buffer The buffer containing the key to use for
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* computing the MAC. This buffer contains the key
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* in export representation as defined by
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* psa_export_key() (i.e. the raw key bytes).
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* \param key_buffer_size Size of the \p key_buffer buffer in bytes.
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* \param alg The MAC algorithm to use (\c PSA_ALG_XXX value
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* such that #PSA_ALG_IS_MAC(\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_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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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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*/
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psa_status_t mbedtls_psa_mac_verify_setup(
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mbedtls_psa_mac_operation_t *operation,
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const psa_key_attributes_t *attributes,
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const uint8_t *key_buffer,
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size_t key_buffer_size,
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psa_algorithm_t alg);
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/** Add a message fragment to a multipart MAC operation using Mbed TLS.
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*
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* \note The signature of this function is that of a PSA driver mac_update
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* entry point. This function behaves as a mac_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 PSA core calls mbedtls_psa_mac_sign_setup() or
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* mbedtls_psa_mac_verify_setup() before calling this function.
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*
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* If this function returns an error status, the PSA core aborts the
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* operation by calling mbedtls_psa_mac_abort().
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*
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* \param[in,out] operation Active MAC operation.
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* \param[in] input Buffer containing the message fragment to add to
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* the MAC calculation.
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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 \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_mac_update(
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mbedtls_psa_mac_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 MAC of a message using Mbed TLS.
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*
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* \note The signature of this function is that of a PSA driver mac_sign_finish
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* entry point. This function behaves as a mac_sign_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 PSA core calls mbedtls_psa_mac_sign_setup() before calling this function.
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* This function calculates the MAC of the message formed by concatenating
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* the inputs passed to preceding calls to mbedtls_psa_mac_update().
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*
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* Whether this function returns successfully or not, the PSA core subsequently
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* aborts the operation by calling mbedtls_psa_mac_abort().
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*
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* \param[in,out] operation Active MAC operation.
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* \param[out] mac Buffer where the MAC value is to be written.
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* \param mac_size Output size requested for the MAC algorithm. The PSA
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* core guarantees this is a valid MAC length for the
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* algorithm and key combination passed to
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* mbedtls_psa_mac_sign_setup(). It also guarantees the
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* \p mac buffer is large enough to contain the
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* requested output size.
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* \param[out] mac_length On success, the number of bytes output to buffer
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* \p mac, which will be equal to the requested length
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* \p mac_size.
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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 an active mac sign
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* operation).
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* \retval #PSA_ERROR_BUFFER_TOO_SMALL
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* The size of the \p mac buffer is too small. A sufficient buffer size
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* can be determined by calling PSA_MAC_LENGTH().
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_mac_sign_finish(
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mbedtls_psa_mac_operation_t *operation,
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uint8_t *mac,
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size_t mac_size,
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size_t *mac_length);
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/** Finish the calculation of the MAC of a message and compare it with
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* an expected value using Mbed TLS.
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*
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* \note The signature of this function is that of a PSA driver
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* mac_verify_finish entry point. This function behaves as a
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* mac_verify_finish entry point as defined in the PSA driver interface
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* specification for transparent drivers.
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*
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* The PSA core calls mbedtls_psa_mac_verify_setup() before calling this
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* function. This function calculates the MAC of the message formed by
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* concatenating the inputs passed to preceding calls to
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* mbedtls_psa_mac_update(). It then compares the calculated MAC with the
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* expected MAC passed as a parameter to this function.
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*
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* Whether this function returns successfully or not, the PSA core subsequently
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* aborts the operation by calling mbedtls_psa_mac_abort().
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*
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* \param[in,out] operation Active MAC operation.
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* \param[in] mac Buffer containing the expected MAC value.
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* \param mac_length Length in bytes of the expected MAC value. The PSA
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* core guarantees that this length is a valid MAC
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* length for the algorithm and key combination passed
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* to mbedtls_psa_mac_verify_setup().
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*
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* \retval #PSA_SUCCESS
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* The expected MAC is identical to the actual MAC of the message.
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* \retval #PSA_ERROR_INVALID_SIGNATURE
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* The MAC of the message was calculated successfully, but it
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* differs from the expected MAC.
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* \retval #PSA_ERROR_BAD_STATE
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* The operation state is not valid (it must be an active mac verify
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* operation).
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* \retval #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_mac_verify_finish(
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mbedtls_psa_mac_operation_t *operation,
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const uint8_t *mac,
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size_t mac_length);
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/** Abort a MAC operation using Mbed TLS.
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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_mac_sign_setup() or mbedtls_psa_mac_verify_setup() again.
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*
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* The PSA core may call this function any time after the operation object has
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* been initialized by one of the methods described in
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* #mbedtls_psa_mac_operation_t.
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*
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* In particular, calling mbedtls_psa_mac_abort() after the operation has been
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* terminated by a call to mbedtls_psa_mac_abort(),
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* mbedtls_psa_mac_sign_finish() or mbedtls_psa_mac_verify_finish() is safe and
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* has no effect.
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*
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* \param[in,out] operation Initialized MAC operation.
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*
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* \retval #PSA_SUCCESS \emptydescription
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* \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription
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*/
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psa_status_t mbedtls_psa_mac_abort(
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mbedtls_psa_mac_operation_t *operation);
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#endif /* PSA_CRYPTO_MAC_H */
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