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Diffstat (limited to 'include/psa/crypto_se_driver.h')
| -rw-r--r-- | include/psa/crypto_se_driver.h | 1383 |
1 files changed, 0 insertions, 1383 deletions
diff --git a/include/psa/crypto_se_driver.h b/include/psa/crypto_se_driver.h deleted file mode 100644 index 9ce14bb..0000000 --- a/include/psa/crypto_se_driver.h +++ /dev/null @@ -1,1383 +0,0 @@ -/** - * \file psa/crypto_se_driver.h - * \brief PSA external cryptoprocessor driver module - * - * This header declares types and function signatures for cryptography - * drivers that access key material via opaque references. - * This is meant for cryptoprocessors that have a separate key storage from the - * space in which the PSA Crypto implementation runs, typically secure - * elements (SEs). - * - * This file is part of the PSA Crypto Driver HAL (hardware abstraction layer), - * containing functions for driver developers to implement to enable hardware - * to be called in a standardized way by a PSA Cryptography API - * implementation. The functions comprising the driver HAL, which driver - * authors implement, are not intended to be called by application developers. - */ - -/* - * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later - */ -#ifndef PSA_CRYPTO_SE_DRIVER_H -#define PSA_CRYPTO_SE_DRIVER_H -#include "mbedtls/private_access.h" - -#include "crypto_driver_common.h" - -#ifdef __cplusplus -extern "C" { -#endif - -/** \defgroup se_init Secure element driver initialization - */ -/**@{*/ - -/** \brief Driver context structure - * - * Driver functions receive a pointer to this structure. - * Each registered driver has one instance of this structure. - * - * Implementations must include the fields specified here and - * may include other fields. - */ -typedef struct { - /** A read-only pointer to the driver's persistent data. - * - * Drivers typically use this persistent data to keep track of - * which slot numbers are available. This is only a guideline: - * drivers may use the persistent data for any purpose, keeping - * in mind the restrictions on when the persistent data is saved - * to storage: the persistent data is only saved after calling - * certain functions that receive a writable pointer to the - * persistent data. - * - * The core allocates a memory buffer for the persistent data. - * The pointer is guaranteed to be suitably aligned for any data type, - * like a pointer returned by `malloc` (but the core can use any - * method to allocate the buffer, not necessarily `malloc`). - * - * The size of this buffer is in the \c persistent_data_size field of - * this structure. - * - * Before the driver is initialized for the first time, the content of - * the persistent data is all-bits-zero. After a driver upgrade, if the - * size of the persistent data has increased, the original data is padded - * on the right with zeros; if the size has decreased, the original data - * is truncated to the new size. - * - * This pointer is to read-only data. Only a few driver functions are - * allowed to modify the persistent data. These functions receive a - * writable pointer. These functions are: - * - psa_drv_se_t::p_init - * - psa_drv_se_key_management_t::p_allocate - * - psa_drv_se_key_management_t::p_destroy - * - * The PSA Cryptography core saves the persistent data from one - * session to the next. It does this before returning from API functions - * that call a driver method that is allowed to modify the persistent - * data, specifically: - * - psa_crypto_init() causes a call to psa_drv_se_t::p_init, and may call - * psa_drv_se_key_management_t::p_destroy to complete an action - * that was interrupted by a power failure. - * - Key creation functions cause a call to - * psa_drv_se_key_management_t::p_allocate, and may cause a call to - * psa_drv_se_key_management_t::p_destroy in case an error occurs. - * - psa_destroy_key() causes a call to - * psa_drv_se_key_management_t::p_destroy. - */ - const void *const MBEDTLS_PRIVATE(persistent_data); - - /** The size of \c persistent_data in bytes. - * - * This is always equal to the value of the `persistent_data_size` field - * of the ::psa_drv_se_t structure when the driver is registered. - */ - const size_t MBEDTLS_PRIVATE(persistent_data_size); - - /** Driver transient data. - * - * The core initializes this value to 0 and does not read or modify it - * afterwards. The driver may store whatever it wants in this field. - */ - uintptr_t MBEDTLS_PRIVATE(transient_data); -} psa_drv_se_context_t; - -/** \brief A driver initialization function. - * - * \param[in,out] drv_context The driver context structure. - * \param[in,out] persistent_data A pointer to the persistent data - * that allows writing. - * \param location The location value for which this driver - * is registered. The driver will be invoked - * for all keys whose lifetime is in this - * location. - * - * \retval #PSA_SUCCESS - * The driver is operational. - * The core will update the persistent data in storage. - * \return - * Any other return value prevents the driver from being used in - * this session. - * The core will NOT update the persistent data in storage. - */ -typedef psa_status_t (*psa_drv_se_init_t)(psa_drv_se_context_t *drv_context, - void *persistent_data, - psa_key_location_t location); - -#if defined(__DOXYGEN_ONLY__) || !defined(MBEDTLS_PSA_CRYPTO_SE_C) -/* Mbed TLS with secure element support enabled defines this type in - * crypto_types.h because it is also visible to applications through an - * implementation-specific extension. - * For the PSA Cryptography specification, this type is only visible - * via crypto_se_driver.h. */ -/** An internal designation of a key slot between the core part of the - * PSA Crypto implementation and the driver. The meaning of this value - * is driver-dependent. */ -typedef uint64_t psa_key_slot_number_t; -#endif /* __DOXYGEN_ONLY__ || !MBEDTLS_PSA_CRYPTO_SE_C */ - -/**@}*/ - -/** \defgroup se_mac Secure Element Message Authentication Codes - * Generation and authentication of Message Authentication Codes (MACs) using - * a secure element can be done either as a single function call (via the - * `psa_drv_se_mac_generate_t` or `psa_drv_se_mac_verify_t` functions), or in - * parts using the following sequence: - * - `psa_drv_se_mac_setup_t` - * - `psa_drv_se_mac_update_t` - * - `psa_drv_se_mac_update_t` - * - ... - * - `psa_drv_se_mac_finish_t` or `psa_drv_se_mac_finish_verify_t` - * - * If a previously started secure element MAC operation needs to be terminated, - * it should be done so by the `psa_drv_se_mac_abort_t`. Failure to do so may - * result in allocated resources not being freed or in other undefined - * behavior. - */ -/**@{*/ -/** \brief A function that starts a secure element MAC operation for a PSA - * Crypto Driver implementation - * - * \param[in,out] drv_context The driver context structure. - * \param[in,out] op_context A structure that will contain the - * hardware-specific MAC context - * \param[in] key_slot The slot of the key to be used for the - * operation - * \param[in] algorithm The algorithm to be used to underly the MAC - * operation - * - * \retval #PSA_SUCCESS - * Success. - */ -typedef psa_status_t (*psa_drv_se_mac_setup_t)(psa_drv_se_context_t *drv_context, - void *op_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t algorithm); - -/** \brief A function that continues a previously started secure element MAC - * operation - * - * \param[in,out] op_context A hardware-specific structure for the - * previously-established MAC operation to be - * updated - * \param[in] p_input A buffer containing the message to be appended - * to the MAC operation - * \param[in] input_length The size in bytes of the input message buffer - */ -typedef psa_status_t (*psa_drv_se_mac_update_t)(void *op_context, - const uint8_t *p_input, - size_t input_length); - -/** \brief a function that completes a previously started secure element MAC - * operation by returning the resulting MAC. - * - * \param[in,out] op_context A hardware-specific structure for the - * previously started MAC operation to be - * finished - * \param[out] p_mac A buffer where the generated MAC will be - * placed - * \param[in] mac_size The size in bytes of the buffer that has been - * allocated for the `output` buffer - * \param[out] p_mac_length After completion, will contain the number of - * bytes placed in the `p_mac` buffer - * - * \retval #PSA_SUCCESS - * Success. - */ -typedef psa_status_t (*psa_drv_se_mac_finish_t)(void *op_context, - uint8_t *p_mac, - size_t mac_size, - size_t *p_mac_length); - -/** \brief A function that completes a previously started secure element MAC - * operation by comparing the resulting MAC against a provided value - * - * \param[in,out] op_context A hardware-specific structure for the previously - * started MAC operation to be finished - * \param[in] p_mac The MAC value against which the resulting MAC - * will be compared against - * \param[in] mac_length The size in bytes of the value stored in `p_mac` - * - * \retval #PSA_SUCCESS - * The operation completed successfully and the MACs matched each - * other - * \retval #PSA_ERROR_INVALID_SIGNATURE - * The operation completed successfully, but the calculated MAC did - * not match the provided MAC - */ -typedef psa_status_t (*psa_drv_se_mac_finish_verify_t)(void *op_context, - const uint8_t *p_mac, - size_t mac_length); - -/** \brief A function that aborts a previous started secure element MAC - * operation - * - * \param[in,out] op_context A hardware-specific structure for the previously - * started MAC operation to be aborted - */ -typedef psa_status_t (*psa_drv_se_mac_abort_t)(void *op_context); - -/** \brief A function that performs a secure element MAC operation in one - * command and returns the calculated MAC - * - * \param[in,out] drv_context The driver context structure. - * \param[in] p_input A buffer containing the message to be MACed - * \param[in] input_length The size in bytes of `p_input` - * \param[in] key_slot The slot of the key to be used - * \param[in] alg The algorithm to be used to underlie the MAC - * operation - * \param[out] p_mac A buffer where the generated MAC will be - * placed - * \param[in] mac_size The size in bytes of the `p_mac` buffer - * \param[out] p_mac_length After completion, will contain the number of - * bytes placed in the `output` buffer - * - * \retval #PSA_SUCCESS - * Success. - */ -typedef psa_status_t (*psa_drv_se_mac_generate_t)(psa_drv_se_context_t *drv_context, - const uint8_t *p_input, - size_t input_length, - psa_key_slot_number_t key_slot, - psa_algorithm_t alg, - uint8_t *p_mac, - size_t mac_size, - size_t *p_mac_length); - -/** \brief A function that performs a secure element MAC operation in one - * command and compares the resulting MAC against a provided value - * - * \param[in,out] drv_context The driver context structure. - * \param[in] p_input A buffer containing the message to be MACed - * \param[in] input_length The size in bytes of `input` - * \param[in] key_slot The slot of the key to be used - * \param[in] alg The algorithm to be used to underlie the MAC - * operation - * \param[in] p_mac The MAC value against which the resulting MAC will - * be compared against - * \param[in] mac_length The size in bytes of `mac` - * - * \retval #PSA_SUCCESS - * The operation completed successfully and the MACs matched each - * other - * \retval #PSA_ERROR_INVALID_SIGNATURE - * The operation completed successfully, but the calculated MAC did - * not match the provided MAC - */ -typedef psa_status_t (*psa_drv_se_mac_verify_t)(psa_drv_se_context_t *drv_context, - const uint8_t *p_input, - size_t input_length, - psa_key_slot_number_t key_slot, - psa_algorithm_t alg, - const uint8_t *p_mac, - size_t mac_length); - -/** \brief A struct containing all of the function pointers needed to - * perform secure element MAC operations - * - * PSA Crypto API implementations should populate the table as appropriate - * upon startup. - * - * If one of the functions is not implemented (such as - * `psa_drv_se_mac_generate_t`), it should be set to NULL. - * - * Driver implementers should ensure that they implement all of the functions - * that make sense for their hardware, and that they provide a full solution - * (for example, if they support `p_setup`, they should also support - * `p_update` and at least one of `p_finish` or `p_finish_verify`). - * - */ -typedef struct { - /**The size in bytes of the hardware-specific secure element MAC context - * structure - */ - size_t MBEDTLS_PRIVATE(context_size); - /** Function that performs a MAC setup operation - */ - psa_drv_se_mac_setup_t MBEDTLS_PRIVATE(p_setup); - /** Function that performs a MAC update operation - */ - psa_drv_se_mac_update_t MBEDTLS_PRIVATE(p_update); - /** Function that completes a MAC operation - */ - psa_drv_se_mac_finish_t MBEDTLS_PRIVATE(p_finish); - /** Function that completes a MAC operation with a verify check - */ - psa_drv_se_mac_finish_verify_t MBEDTLS_PRIVATE(p_finish_verify); - /** Function that aborts a previously started MAC operation - */ - psa_drv_se_mac_abort_t MBEDTLS_PRIVATE(p_abort); - /** Function that performs a MAC operation in one call - */ - psa_drv_se_mac_generate_t MBEDTLS_PRIVATE(p_mac); - /** Function that performs a MAC and verify operation in one call - */ - psa_drv_se_mac_verify_t MBEDTLS_PRIVATE(p_mac_verify); -} psa_drv_se_mac_t; -/**@}*/ - -/** \defgroup se_cipher Secure Element Symmetric Ciphers - * - * Encryption and Decryption using secure element keys in block modes other - * than ECB must be done in multiple parts, using the following flow: - * - `psa_drv_se_cipher_setup_t` - * - `psa_drv_se_cipher_set_iv_t` (optional depending upon block mode) - * - `psa_drv_se_cipher_update_t` - * - `psa_drv_se_cipher_update_t` - * - ... - * - `psa_drv_se_cipher_finish_t` - * - * If a previously started secure element Cipher operation needs to be - * terminated, it should be done so by the `psa_drv_se_cipher_abort_t`. Failure - * to do so may result in allocated resources not being freed or in other - * undefined behavior. - * - * In situations where a PSA Cryptographic API implementation is using a block - * mode not-supported by the underlying hardware or driver, it can construct - * the block mode itself, while calling the `psa_drv_se_cipher_ecb_t` function - * for the cipher operations. - */ -/**@{*/ - -/** \brief A function that provides the cipher setup function for a - * secure element driver - * - * \param[in,out] drv_context The driver context structure. - * \param[in,out] op_context A structure that will contain the - * hardware-specific cipher context. - * \param[in] key_slot The slot of the key to be used for the - * operation - * \param[in] algorithm The algorithm to be used in the cipher - * operation - * \param[in] direction Indicates whether the operation is an encrypt - * or decrypt - * - * \retval #PSA_SUCCESS \emptydescription - * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription - */ -typedef psa_status_t (*psa_drv_se_cipher_setup_t)(psa_drv_se_context_t *drv_context, - void *op_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t algorithm, - psa_encrypt_or_decrypt_t direction); - -/** \brief A function that sets the initialization vector (if - * necessary) for a secure element cipher operation - * - * Rationale: The `psa_se_cipher_*` operation in the PSA Cryptographic API has - * two IV functions: one to set the IV, and one to generate it internally. The - * generate function is not necessary for the drivers to implement as the PSA - * Crypto implementation can do the generation using its RNG features. - * - * \param[in,out] op_context A structure that contains the previously set up - * hardware-specific cipher context - * \param[in] p_iv A buffer containing the initialization vector - * \param[in] iv_length The size (in bytes) of the `p_iv` buffer - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_cipher_set_iv_t)(void *op_context, - const uint8_t *p_iv, - size_t iv_length); - -/** \brief A function that continues a previously started secure element cipher - * operation - * - * \param[in,out] op_context A hardware-specific structure for the - * previously started cipher operation - * \param[in] p_input A buffer containing the data to be - * encrypted/decrypted - * \param[in] input_size The size in bytes of the buffer pointed to - * by `p_input` - * \param[out] p_output The caller-allocated buffer where the - * output will be placed - * \param[in] output_size The allocated size in bytes of the - * `p_output` buffer - * \param[out] p_output_length After completion, will contain the number - * of bytes placed in the `p_output` buffer - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_cipher_update_t)(void *op_context, - const uint8_t *p_input, - size_t input_size, - uint8_t *p_output, - size_t output_size, - size_t *p_output_length); - -/** \brief A function that completes a previously started secure element cipher - * operation - * - * \param[in,out] op_context A hardware-specific structure for the - * previously started cipher operation - * \param[out] p_output The caller-allocated buffer where the output - * will be placed - * \param[in] output_size The allocated size in bytes of the `p_output` - * buffer - * \param[out] p_output_length After completion, will contain the number of - * bytes placed in the `p_output` buffer - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_cipher_finish_t)(void *op_context, - uint8_t *p_output, - size_t output_size, - size_t *p_output_length); - -/** \brief A function that aborts a previously started secure element cipher - * operation - * - * \param[in,out] op_context A hardware-specific structure for the - * previously started cipher operation - */ -typedef psa_status_t (*psa_drv_se_cipher_abort_t)(void *op_context); - -/** \brief A function that performs the ECB block mode for secure element - * cipher operations - * - * Note: this function should only be used with implementations that do not - * provide a needed higher-level operation. - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key_slot The slot of the key to be used for the operation - * \param[in] algorithm The algorithm to be used in the cipher operation - * \param[in] direction Indicates whether the operation is an encrypt or - * decrypt - * \param[in] p_input A buffer containing the data to be - * encrypted/decrypted - * \param[in] input_size The size in bytes of the buffer pointed to by - * `p_input` - * \param[out] p_output The caller-allocated buffer where the output - * will be placed - * \param[in] output_size The allocated size in bytes of the `p_output` - * buffer - * - * \retval #PSA_SUCCESS \emptydescription - * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription - */ -typedef psa_status_t (*psa_drv_se_cipher_ecb_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t algorithm, - psa_encrypt_or_decrypt_t direction, - const uint8_t *p_input, - size_t input_size, - uint8_t *p_output, - size_t output_size); - -/** - * \brief A struct containing all of the function pointers needed to implement - * cipher operations using secure elements. - * - * PSA Crypto API implementations should populate instances of the table as - * appropriate upon startup or at build time. - * - * If one of the functions is not implemented (such as - * `psa_drv_se_cipher_ecb_t`), it should be set to NULL. - */ -typedef struct { - /** The size in bytes of the hardware-specific secure element cipher - * context structure - */ - size_t MBEDTLS_PRIVATE(context_size); - /** Function that performs a cipher setup operation */ - psa_drv_se_cipher_setup_t MBEDTLS_PRIVATE(p_setup); - /** Function that sets a cipher IV (if necessary) */ - psa_drv_se_cipher_set_iv_t MBEDTLS_PRIVATE(p_set_iv); - /** Function that performs a cipher update operation */ - psa_drv_se_cipher_update_t MBEDTLS_PRIVATE(p_update); - /** Function that completes a cipher operation */ - psa_drv_se_cipher_finish_t MBEDTLS_PRIVATE(p_finish); - /** Function that aborts a cipher operation */ - psa_drv_se_cipher_abort_t MBEDTLS_PRIVATE(p_abort); - /** Function that performs ECB mode for a cipher operation - * (Danger: ECB mode should not be used directly by clients of the PSA - * Crypto Client API) - */ - psa_drv_se_cipher_ecb_t MBEDTLS_PRIVATE(p_ecb); -} psa_drv_se_cipher_t; - -/**@}*/ - -/** \defgroup se_asymmetric Secure Element Asymmetric Cryptography - * - * Since the amount of data that can (or should) be encrypted or signed using - * asymmetric keys is limited by the key size, asymmetric key operations using - * keys in a secure element must be done in single function calls. - */ -/**@{*/ - -/** - * \brief A function that signs a hash or short message with a private key in - * a secure element - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key_slot Key slot of an asymmetric key pair - * \param[in] alg A signature algorithm that is compatible - * with the type of `key` - * \param[in] p_hash The hash to sign - * \param[in] hash_length Size of the `p_hash` buffer in bytes - * \param[out] p_signature Buffer where the signature is to be written - * \param[in] signature_size Size of the `p_signature` buffer in bytes - * \param[out] p_signature_length On success, the number of bytes - * that make up the returned signature value - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_asymmetric_sign_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t alg, - const uint8_t *p_hash, - size_t hash_length, - uint8_t *p_signature, - size_t signature_size, - size_t *p_signature_length); - -/** - * \brief A function that verifies the signature a hash or short message using - * an asymmetric public key in a secure element - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key_slot Key slot of a public key or an asymmetric key - * pair - * \param[in] alg A signature algorithm that is compatible with - * the type of `key` - * \param[in] p_hash The hash whose signature is to be verified - * \param[in] hash_length Size of the `p_hash` buffer in bytes - * \param[in] p_signature Buffer containing the signature to verify - * \param[in] signature_length Size of the `p_signature` buffer in bytes - * - * \retval #PSA_SUCCESS - * The signature is valid. - */ -typedef psa_status_t (*psa_drv_se_asymmetric_verify_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t alg, - const uint8_t *p_hash, - size_t hash_length, - const uint8_t *p_signature, - size_t signature_length); - -/** - * \brief A function that encrypts a short message with an asymmetric public - * key in a secure element - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key_slot Key slot of a public key or an asymmetric key - * pair - * \param[in] alg An asymmetric encryption algorithm that is - * compatible with the type of `key` - * \param[in] p_input The message to encrypt - * \param[in] input_length Size of the `p_input` buffer in bytes - * \param[in] p_salt A salt or label, if supported by the - * encryption algorithm - * If the algorithm does not support a - * salt, pass `NULL`. - * If the algorithm supports an optional - * salt and you do not want to pass a salt, - * pass `NULL`. - * For #PSA_ALG_RSA_PKCS1V15_CRYPT, no salt is - * supported. - * \param[in] salt_length Size of the `p_salt` buffer in bytes - * If `p_salt` is `NULL`, pass 0. - * \param[out] p_output Buffer where the encrypted message is to - * be written - * \param[in] output_size Size of the `p_output` buffer in bytes - * \param[out] p_output_length On success, the number of bytes that make up - * the returned output - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_asymmetric_encrypt_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t alg, - const uint8_t *p_input, - size_t input_length, - const uint8_t *p_salt, - size_t salt_length, - uint8_t *p_output, - size_t output_size, - size_t *p_output_length); - -/** - * \brief A function that decrypts a short message with an asymmetric private - * key in a secure element. - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key_slot Key slot of an asymmetric key pair - * \param[in] alg An asymmetric encryption algorithm that is - * compatible with the type of `key` - * \param[in] p_input The message to decrypt - * \param[in] input_length Size of the `p_input` buffer in bytes - * \param[in] p_salt A salt or label, if supported by the - * encryption algorithm - * If the algorithm does not support a - * salt, pass `NULL`. - * If the algorithm supports an optional - * salt and you do not want to pass a salt, - * pass `NULL`. - * For #PSA_ALG_RSA_PKCS1V15_CRYPT, no salt is - * supported. - * \param[in] salt_length Size of the `p_salt` buffer in bytes - * If `p_salt` is `NULL`, pass 0. - * \param[out] p_output Buffer where the decrypted message is to - * be written - * \param[in] output_size Size of the `p_output` buffer in bytes - * \param[out] p_output_length On success, the number of bytes - * that make up the returned output - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_asymmetric_decrypt_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t alg, - const uint8_t *p_input, - size_t input_length, - const uint8_t *p_salt, - size_t salt_length, - uint8_t *p_output, - size_t output_size, - size_t *p_output_length); - -/** - * \brief A struct containing all of the function pointers needed to implement - * asymmetric cryptographic operations using secure elements. - * - * PSA Crypto API implementations should populate instances of the table as - * appropriate upon startup or at build time. - * - * If one of the functions is not implemented, it should be set to NULL. - */ -typedef struct { - /** Function that performs an asymmetric sign operation */ - psa_drv_se_asymmetric_sign_t MBEDTLS_PRIVATE(p_sign); - /** Function that performs an asymmetric verify operation */ - psa_drv_se_asymmetric_verify_t MBEDTLS_PRIVATE(p_verify); - /** Function that performs an asymmetric encrypt operation */ - psa_drv_se_asymmetric_encrypt_t MBEDTLS_PRIVATE(p_encrypt); - /** Function that performs an asymmetric decrypt operation */ - psa_drv_se_asymmetric_decrypt_t MBEDTLS_PRIVATE(p_decrypt); -} psa_drv_se_asymmetric_t; - -/**@}*/ - -/** \defgroup se_aead Secure Element Authenticated Encryption with Additional Data - * Authenticated Encryption with Additional Data (AEAD) operations with secure - * elements must be done in one function call. While this creates a burden for - * implementers as there must be sufficient space in memory for the entire - * message, it prevents decrypted data from being made available before the - * authentication operation is complete and the data is known to be authentic. - */ -/**@{*/ - -/** \brief A function that performs a secure element authenticated encryption - * operation - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key_slot Slot containing the key to use. - * \param[in] algorithm The AEAD algorithm to compute - * (\c PSA_ALG_XXX value such that - * #PSA_ALG_IS_AEAD(`alg`) is true) - * \param[in] p_nonce Nonce or IV to use - * \param[in] nonce_length Size of the `p_nonce` buffer in bytes - * \param[in] p_additional_data Additional data that will be - * authenticated but not encrypted - * \param[in] additional_data_length Size of `p_additional_data` in bytes - * \param[in] p_plaintext Data that will be authenticated and - * encrypted - * \param[in] plaintext_length Size of `p_plaintext` in bytes - * \param[out] p_ciphertext Output buffer for the authenticated and - * encrypted data. The additional data is - * not part of this output. For algorithms - * where the encrypted data and the - * authentication tag are defined as - * separate outputs, the authentication - * tag is appended to the encrypted data. - * \param[in] ciphertext_size Size of the `p_ciphertext` buffer in - * bytes - * \param[out] p_ciphertext_length On success, the size of the output in - * the `p_ciphertext` buffer - * - * \retval #PSA_SUCCESS - * Success. - */ -typedef psa_status_t (*psa_drv_se_aead_encrypt_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t algorithm, - const uint8_t *p_nonce, - size_t nonce_length, - const uint8_t *p_additional_data, - size_t additional_data_length, - const uint8_t *p_plaintext, - size_t plaintext_length, - uint8_t *p_ciphertext, - size_t ciphertext_size, - size_t *p_ciphertext_length); - -/** A function that performs a secure element authenticated decryption operation - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key_slot Slot containing the key to use - * \param[in] algorithm The AEAD algorithm to compute - * (\c PSA_ALG_XXX value such that - * #PSA_ALG_IS_AEAD(`alg`) is true) - * \param[in] p_nonce Nonce or IV to use - * \param[in] nonce_length Size of the `p_nonce` buffer in bytes - * \param[in] p_additional_data Additional data that has been - * authenticated but not encrypted - * \param[in] additional_data_length Size of `p_additional_data` in bytes - * \param[in] p_ciphertext Data that has been authenticated and - * encrypted. - * For algorithms where the encrypted data - * and the authentication tag are defined - * as separate inputs, the buffer must - * contain the encrypted data followed by - * the authentication tag. - * \param[in] ciphertext_length Size of `p_ciphertext` in bytes - * \param[out] p_plaintext Output buffer for the decrypted data - * \param[in] plaintext_size Size of the `p_plaintext` buffer in - * bytes - * \param[out] p_plaintext_length On success, the size of the output in - * the `p_plaintext` buffer - * - * \retval #PSA_SUCCESS - * Success. - */ -typedef psa_status_t (*psa_drv_se_aead_decrypt_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - psa_algorithm_t algorithm, - const uint8_t *p_nonce, - size_t nonce_length, - const uint8_t *p_additional_data, - size_t additional_data_length, - const uint8_t *p_ciphertext, - size_t ciphertext_length, - uint8_t *p_plaintext, - size_t plaintext_size, - size_t *p_plaintext_length); - -/** - * \brief A struct containing all of the function pointers needed to implement - * secure element Authenticated Encryption with Additional Data operations - * - * PSA Crypto API implementations should populate instances of the table as - * appropriate upon startup. - * - * If one of the functions is not implemented, it should be set to NULL. - */ -typedef struct { - /** Function that performs the AEAD encrypt operation */ - psa_drv_se_aead_encrypt_t MBEDTLS_PRIVATE(p_encrypt); - /** Function that performs the AEAD decrypt operation */ - psa_drv_se_aead_decrypt_t MBEDTLS_PRIVATE(p_decrypt); -} psa_drv_se_aead_t; -/**@}*/ - -/** \defgroup se_key_management Secure Element Key Management - * Currently, key management is limited to importing keys in the clear, - * destroying keys, and exporting keys in the clear. - * Whether a key may be exported is determined by the key policies in place - * on the key slot. - */ -/**@{*/ - -/** An enumeration indicating how a key is created. - */ -typedef enum { - PSA_KEY_CREATION_IMPORT, /**< During psa_import_key() */ - PSA_KEY_CREATION_GENERATE, /**< During psa_generate_key() */ - PSA_KEY_CREATION_DERIVE, /**< During psa_key_derivation_output_key() */ - PSA_KEY_CREATION_COPY, /**< During psa_copy_key() */ - -#ifndef __DOXYGEN_ONLY__ - /** A key is being registered with mbedtls_psa_register_se_key(). - * - * The core only passes this value to - * psa_drv_se_key_management_t::p_validate_slot_number, not to - * psa_drv_se_key_management_t::p_allocate. The call to - * `p_validate_slot_number` is not followed by any other call to the - * driver: the key is considered successfully registered if the call to - * `p_validate_slot_number` succeeds, or if `p_validate_slot_number` is - * null. - * - * With this creation method, the driver must return #PSA_SUCCESS if - * the given attributes are compatible with the existing key in the slot, - * and #PSA_ERROR_DOES_NOT_EXIST if the driver can determine that there - * is no key with the specified slot number. - * - * This is an Mbed TLS extension. - */ - PSA_KEY_CREATION_REGISTER, -#endif -} psa_key_creation_method_t; - -/** \brief A function that allocates a slot for a key. - * - * To create a key in a specific slot in a secure element, the core - * first calls this function to determine a valid slot number, - * then calls a function to create the key material in that slot. - * In nominal conditions (that is, if no error occurs), - * the effect of a call to a key creation function in the PSA Cryptography - * API with a lifetime that places the key in a secure element is the - * following: - * -# The core calls psa_drv_se_key_management_t::p_allocate - * (or in some implementations - * psa_drv_se_key_management_t::p_validate_slot_number). The driver - * selects (or validates) a suitable slot number given the key attributes - * and the state of the secure element. - * -# The core calls a key creation function in the driver. - * - * The key creation functions in the PSA Cryptography API are: - * - psa_import_key(), which causes - * a call to `p_allocate` with \p method = #PSA_KEY_CREATION_IMPORT - * then a call to psa_drv_se_key_management_t::p_import. - * - psa_generate_key(), which causes - * a call to `p_allocate` with \p method = #PSA_KEY_CREATION_GENERATE - * then a call to psa_drv_se_key_management_t::p_import. - * - psa_key_derivation_output_key(), which causes - * a call to `p_allocate` with \p method = #PSA_KEY_CREATION_DERIVE - * then a call to psa_drv_se_key_derivation_t::p_derive. - * - psa_copy_key(), which causes - * a call to `p_allocate` with \p method = #PSA_KEY_CREATION_COPY - * then a call to psa_drv_se_key_management_t::p_export. - * - * In case of errors, other behaviors are possible. - * - If the PSA Cryptography subsystem dies after the first step, - * for example because the device has lost power abruptly, - * the second step may never happen, or may happen after a reset - * and re-initialization. Alternatively, after a reset and - * re-initialization, the core may call - * psa_drv_se_key_management_t::p_destroy on the slot number that - * was allocated (or validated) instead of calling a key creation function. - * - If an error occurs, the core may call - * psa_drv_se_key_management_t::p_destroy on the slot number that - * was allocated (or validated) instead of calling a key creation function. - * - * Errors and system resets also have an impact on the driver's persistent - * data. If a reset happens before the overall key creation process is - * completed (before or after the second step above), it is unspecified - * whether the persistent data after the reset is identical to what it - * was before or after the call to `p_allocate` (or `p_validate_slot_number`). - * - * \param[in,out] drv_context The driver context structure. - * \param[in,out] persistent_data A pointer to the persistent data - * that allows writing. - * \param[in] attributes Attributes of the key. - * \param method The way in which the key is being created. - * \param[out] key_slot Slot where the key will be stored. - * This must be a valid slot for a key of the - * chosen type. It must be unoccupied. - * - * \retval #PSA_SUCCESS - * Success. - * The core will record \c *key_slot as the key slot where the key - * is stored and will update the persistent data in storage. - * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription - * \retval #PSA_ERROR_INSUFFICIENT_STORAGE \emptydescription - */ -typedef psa_status_t (*psa_drv_se_allocate_key_t)( - psa_drv_se_context_t *drv_context, - void *persistent_data, - const psa_key_attributes_t *attributes, - psa_key_creation_method_t method, - psa_key_slot_number_t *key_slot); - -/** \brief A function that determines whether a slot number is valid - * for a key. - * - * To create a key in a specific slot in a secure element, the core - * first calls this function to validate the choice of slot number, - * then calls a function to create the key material in that slot. - * See the documentation of #psa_drv_se_allocate_key_t for more details. - * - * As of the PSA Cryptography API specification version 1.0, there is no way - * for applications to trigger a call to this function. However some - * implementations offer the capability to create or declare a key in - * a specific slot via implementation-specific means, generally for the - * sake of initial device provisioning or onboarding. Such a mechanism may - * be added to a future version of the PSA Cryptography API specification. - * - * This function may update the driver's persistent data through - * \p persistent_data. The core will save the updated persistent data at the - * end of the key creation process. See the description of - * ::psa_drv_se_allocate_key_t for more information. - * - * \param[in,out] drv_context The driver context structure. - * \param[in,out] persistent_data A pointer to the persistent data - * that allows writing. - * \param[in] attributes Attributes of the key. - * \param method The way in which the key is being created. - * \param[in] key_slot Slot where the key is to be stored. - * - * \retval #PSA_SUCCESS - * The given slot number is valid for a key with the given - * attributes. - * \retval #PSA_ERROR_INVALID_ARGUMENT - * The given slot number is not valid for a key with the - * given attributes. This includes the case where the slot - * number is not valid at all. - * \retval #PSA_ERROR_ALREADY_EXISTS - * There is already a key with the specified slot number. - * Drivers may choose to return this error from the key - * creation function instead. - */ -typedef psa_status_t (*psa_drv_se_validate_slot_number_t)( - psa_drv_se_context_t *drv_context, - void *persistent_data, - const psa_key_attributes_t *attributes, - psa_key_creation_method_t method, - psa_key_slot_number_t key_slot); - -/** \brief A function that imports a key into a secure element in binary format - * - * This function can support any output from psa_export_key(). Refer to the - * documentation of psa_export_key() for the format for each key type. - * - * \param[in,out] drv_context The driver context structure. - * \param key_slot Slot where the key will be stored. - * This must be a valid slot for a key of the - * chosen type. It must be unoccupied. - * \param[in] attributes The key attributes, including the lifetime, - * the key type and the usage policy. - * Drivers should not access the key size stored - * in the attributes: it may not match the - * data passed in \p data. - * Drivers can call psa_get_key_lifetime(), - * psa_get_key_type(), - * psa_get_key_usage_flags() and - * psa_get_key_algorithm() to access this - * information. - * \param[in] data Buffer containing the key data. - * \param[in] data_length Size of the \p data buffer in bytes. - * \param[out] bits On success, the key size in bits. The driver - * must determine this value after parsing the - * key according to the key type. - * This value is not used if the function fails. - * - * \retval #PSA_SUCCESS - * Success. - */ -typedef psa_status_t (*psa_drv_se_import_key_t)( - psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - const psa_key_attributes_t *attributes, - const uint8_t *data, - size_t data_length, - size_t *bits); - -/** - * \brief A function that destroys a secure element key and restore the slot to - * its default state - * - * This function destroys the content of the key from a secure element. - * Implementations shall make a best effort to ensure that any previous content - * of the slot is unrecoverable. - * - * This function returns the specified slot to its default state. - * - * \param[in,out] drv_context The driver context structure. - * \param[in,out] persistent_data A pointer to the persistent data - * that allows writing. - * \param key_slot The key slot to erase. - * - * \retval #PSA_SUCCESS - * The slot's content, if any, has been erased. - */ -typedef psa_status_t (*psa_drv_se_destroy_key_t)( - psa_drv_se_context_t *drv_context, - void *persistent_data, - psa_key_slot_number_t key_slot); - -/** - * \brief A function that exports a secure element key in binary format - * - * The output of this function can be passed to psa_import_key() to - * create an equivalent object. - * - * If a key is created with `psa_import_key()` and then exported with - * this function, it is not guaranteed that the resulting data is - * identical: the implementation may choose a different representation - * of the same key if the format permits it. - * - * This function should generate output in the same format that - * `psa_export_key()` does. Refer to the - * documentation of `psa_export_key()` for the format for each key type. - * - * \param[in,out] drv_context The driver context structure. - * \param[in] key Slot whose content is to be exported. This must - * be an occupied key slot. - * \param[out] p_data Buffer where the key data is to be written. - * \param[in] data_size Size of the `p_data` buffer in bytes. - * \param[out] p_data_length On success, the number of bytes - * that make up the key data. - * - * \retval #PSA_SUCCESS \emptydescription - * \retval #PSA_ERROR_DOES_NOT_EXIST \emptydescription - * \retval #PSA_ERROR_NOT_PERMITTED \emptydescription - * \retval #PSA_ERROR_NOT_SUPPORTED \emptydescription - * \retval #PSA_ERROR_COMMUNICATION_FAILURE \emptydescription - * \retval #PSA_ERROR_HARDWARE_FAILURE \emptydescription - * \retval #PSA_ERROR_CORRUPTION_DETECTED \emptydescription - */ -typedef psa_status_t (*psa_drv_se_export_key_t)(psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key, - uint8_t *p_data, - size_t data_size, - size_t *p_data_length); - -/** - * \brief A function that generates a symmetric or asymmetric key on a secure - * element - * - * If the key type \c type recorded in \p attributes - * is asymmetric (#PSA_KEY_TYPE_IS_ASYMMETRIC(\c type) = 1), - * the driver may export the public key at the time of generation, - * in the format documented for psa_export_public_key() by writing it - * to the \p pubkey buffer. - * This is optional, intended for secure elements that output the - * public key at generation time and that cannot export the public key - * later. Drivers that do not need this feature should leave - * \p *pubkey_length set to 0 and should - * implement the psa_drv_key_management_t::p_export_public function. - * Some implementations do not support this feature, in which case - * \p pubkey is \c NULL and \p pubkey_size is 0. - * - * \param[in,out] drv_context The driver context structure. - * \param key_slot Slot where the key will be stored. - * This must be a valid slot for a key of the - * chosen type. It must be unoccupied. - * \param[in] attributes The key attributes, including the lifetime, - * the key type and size, and the usage policy. - * Drivers can call psa_get_key_lifetime(), - * psa_get_key_type(), psa_get_key_bits(), - * psa_get_key_usage_flags() and - * psa_get_key_algorithm() to access this - * information. - * \param[out] pubkey A buffer where the driver can write the - * public key, when generating an asymmetric - * key pair. - * This is \c NULL when generating a symmetric - * key or if the core does not support - * exporting the public key at generation time. - * \param pubkey_size The size of the `pubkey` buffer in bytes. - * This is 0 when generating a symmetric - * key or if the core does not support - * exporting the public key at generation time. - * \param[out] pubkey_length On entry, this is always 0. - * On success, the number of bytes written to - * \p pubkey. If this is 0 or unchanged on return, - * the core will not read the \p pubkey buffer, - * and will instead call the driver's - * psa_drv_key_management_t::p_export_public - * function to export the public key when needed. - */ -typedef psa_status_t (*psa_drv_se_generate_key_t)( - psa_drv_se_context_t *drv_context, - psa_key_slot_number_t key_slot, - const psa_key_attributes_t *attributes, - uint8_t *pubkey, size_t pubkey_size, size_t *pubkey_length); - -/** - * \brief A struct containing all of the function pointers needed to for secure - * element key management - * - * PSA Crypto API implementations should populate instances of the table as - * appropriate upon startup or at build time. - * - * If one of the functions is not implemented, it should be set to NULL. - */ -typedef struct { - /** Function that allocates a slot for a key. */ - psa_drv_se_allocate_key_t MBEDTLS_PRIVATE(p_allocate); - /** Function that checks the validity of a slot for a key. */ - psa_drv_se_validate_slot_number_t MBEDTLS_PRIVATE(p_validate_slot_number); - /** Function that performs a key import operation */ - psa_drv_se_import_key_t MBEDTLS_PRIVATE(p_import); - /** Function that performs a generation */ - psa_drv_se_generate_key_t MBEDTLS_PRIVATE(p_generate); - /** Function that performs a key destroy operation */ - psa_drv_se_destroy_key_t MBEDTLS_PRIVATE(p_destroy); - /** Function that performs a key export operation */ - psa_drv_se_export_key_t MBEDTLS_PRIVATE(p_export); - /** Function that performs a public key export operation */ - psa_drv_se_export_key_t MBEDTLS_PRIVATE(p_export_public); -} psa_drv_se_key_management_t; - -/**@}*/ - -/** \defgroup driver_derivation Secure Element Key Derivation and Agreement - * Key derivation is the process of generating new key material using an - * existing key and additional parameters, iterating through a basic - * cryptographic function, such as a hash. - * Key agreement is a part of cryptographic protocols that allows two parties - * to agree on the same key value, but starting from different original key - * material. - * The flows are similar, and the PSA Crypto Driver Model uses the same functions - * for both of the flows. - * - * There are two different final functions for the flows, - * `psa_drv_se_key_derivation_derive` and `psa_drv_se_key_derivation_export`. - * `psa_drv_se_key_derivation_derive` is used when the key material should be - * placed in a slot on the hardware and not exposed to the caller. - * `psa_drv_se_key_derivation_export` is used when the key material should be - * returned to the PSA Cryptographic API implementation. - * - * Different key derivation algorithms require a different number of inputs. - * Instead of having an API that takes as input variable length arrays, which - * can be problematic to manage on embedded platforms, the inputs are passed - * to the driver via a function, `psa_drv_se_key_derivation_collateral`, that - * is called multiple times with different `collateral_id`s. Thus, for a key - * derivation algorithm that required 3 parameter inputs, the flow would look - * something like: - * ~~~~~~~~~~~~~{.c} - * psa_drv_se_key_derivation_setup(kdf_algorithm, source_key, dest_key_size_bytes); - * psa_drv_se_key_derivation_collateral(kdf_algorithm_collateral_id_0, - * p_collateral_0, - * collateral_0_size); - * psa_drv_se_key_derivation_collateral(kdf_algorithm_collateral_id_1, - * p_collateral_1, - * collateral_1_size); - * psa_drv_se_key_derivation_collateral(kdf_algorithm_collateral_id_2, - * p_collateral_2, - * collateral_2_size); - * psa_drv_se_key_derivation_derive(); - * ~~~~~~~~~~~~~ - * - * key agreement example: - * ~~~~~~~~~~~~~{.c} - * psa_drv_se_key_derivation_setup(alg, source_key. dest_key_size_bytes); - * psa_drv_se_key_derivation_collateral(DHE_PUBKEY, p_pubkey, pubkey_size); - * psa_drv_se_key_derivation_export(p_session_key, - * session_key_size, - * &session_key_length); - * ~~~~~~~~~~~~~ - */ -/**@{*/ - -/** \brief A function that Sets up a secure element key derivation operation by - * specifying the algorithm and the source key sot - * - * \param[in,out] drv_context The driver context structure. - * \param[in,out] op_context A hardware-specific structure containing any - * context information for the implementation - * \param[in] kdf_alg The algorithm to be used for the key derivation - * \param[in] source_key The key to be used as the source material for - * the key derivation - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_key_derivation_setup_t)(psa_drv_se_context_t *drv_context, - void *op_context, - psa_algorithm_t kdf_alg, - psa_key_slot_number_t source_key); - -/** \brief A function that provides collateral (parameters) needed for a secure - * element key derivation or key agreement operation - * - * Since many key derivation algorithms require multiple parameters, it is - * expected that this function may be called multiple times for the same - * operation, each with a different algorithm-specific `collateral_id` - * - * \param[in,out] op_context A hardware-specific structure containing any - * context information for the implementation - * \param[in] collateral_id An ID for the collateral being provided - * \param[in] p_collateral A buffer containing the collateral data - * \param[in] collateral_size The size in bytes of the collateral - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_key_derivation_collateral_t)(void *op_context, - uint32_t collateral_id, - const uint8_t *p_collateral, - size_t collateral_size); - -/** \brief A function that performs the final secure element key derivation - * step and place the generated key material in a slot - * - * \param[in,out] op_context A hardware-specific structure containing any - * context information for the implementation - * \param[in] dest_key The slot where the generated key material - * should be placed - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_key_derivation_derive_t)(void *op_context, - psa_key_slot_number_t dest_key); - -/** \brief A function that performs the final step of a secure element key - * agreement and place the generated key material in a buffer - * - * \param[out] p_output Buffer in which to place the generated key - * material - * \param[in] output_size The size in bytes of `p_output` - * \param[out] p_output_length Upon success, contains the number of bytes of - * key material placed in `p_output` - * - * \retval #PSA_SUCCESS \emptydescription - */ -typedef psa_status_t (*psa_drv_se_key_derivation_export_t)(void *op_context, - uint8_t *p_output, - size_t output_size, - size_t *p_output_length); - -/** - * \brief A struct containing all of the function pointers needed to for secure - * element key derivation and agreement - * - * PSA Crypto API implementations should populate instances of the table as - * appropriate upon startup. - * - * If one of the functions is not implemented, it should be set to NULL. - */ -typedef struct { - /** The driver-specific size of the key derivation context */ - size_t MBEDTLS_PRIVATE(context_size); - /** Function that performs a key derivation setup */ - psa_drv_se_key_derivation_setup_t MBEDTLS_PRIVATE(p_setup); - /** Function that sets key derivation collateral */ - psa_drv_se_key_derivation_collateral_t MBEDTLS_PRIVATE(p_collateral); - /** Function that performs a final key derivation step */ - psa_drv_se_key_derivation_derive_t MBEDTLS_PRIVATE(p_derive); - /** Function that performs a final key derivation or agreement and - * exports the key */ - psa_drv_se_key_derivation_export_t MBEDTLS_PRIVATE(p_export); -} psa_drv_se_key_derivation_t; - -/**@}*/ - -/** \defgroup se_registration Secure element driver registration - */ -/**@{*/ - -/** A structure containing pointers to all the entry points of a - * secure element driver. - * - * Future versions of this specification may add extra substructures at - * the end of this structure. - */ -typedef struct { - /** The version of the driver HAL that this driver implements. - * This is a protection against loading driver binaries built against - * a different version of this specification. - * Use #PSA_DRV_SE_HAL_VERSION. - */ - uint32_t MBEDTLS_PRIVATE(hal_version); - - /** The size of the driver's persistent data in bytes. - * - * This can be 0 if the driver does not need persistent data. - * - * See the documentation of psa_drv_se_context_t::persistent_data - * for more information about why and how a driver can use - * persistent data. - */ - size_t MBEDTLS_PRIVATE(persistent_data_size); - - /** The driver initialization function. - * - * This function is called once during the initialization of the - * PSA Cryptography subsystem, before any other function of the - * driver is called. If this function returns a failure status, - * the driver will be unusable, at least until the next system reset. - * - * If this field is \c NULL, it is equivalent to a function that does - * nothing and returns #PSA_SUCCESS. - */ - psa_drv_se_init_t MBEDTLS_PRIVATE(p_init); - - const psa_drv_se_key_management_t *MBEDTLS_PRIVATE(key_management); - const psa_drv_se_mac_t *MBEDTLS_PRIVATE(mac); - const psa_drv_se_cipher_t *MBEDTLS_PRIVATE(cipher); - const psa_drv_se_aead_t *MBEDTLS_PRIVATE(aead); - const psa_drv_se_asymmetric_t *MBEDTLS_PRIVATE(asymmetric); - const psa_drv_se_key_derivation_t *MBEDTLS_PRIVATE(derivation); -} psa_drv_se_t; - -/** The current version of the secure element driver HAL. - */ -/* 0.0.0 patchlevel 5 */ -#define PSA_DRV_SE_HAL_VERSION 0x00000005 - -/** Register an external cryptoprocessor (secure element) driver. - * - * This function is only intended to be used by driver code, not by - * application code. In implementations with separation between the - * PSA cryptography module and applications, this function should - * only be available to callers that run in the same memory space as - * the cryptography module, and should not be exposed to applications - * running in a different memory space. - * - * This function may be called before psa_crypto_init(). It is - * implementation-defined whether this function may be called - * after psa_crypto_init(). - * - * \note Implementations store metadata about keys including the lifetime - * value, which contains the driver's location indicator. Therefore, - * from one instantiation of the PSA Cryptography - * library to the next one, if there is a key in storage with a certain - * lifetime value, you must always register the same driver (or an - * updated version that communicates with the same secure element) - * with the same location value. - * - * \param location The location value through which this driver will - * be exposed to applications. - * This driver will be used for all keys such that - * `location == #PSA_KEY_LIFETIME_GET_LOCATION( lifetime )`. - * The value #PSA_KEY_LOCATION_LOCAL_STORAGE is reserved - * and may not be used for drivers. Implementations - * may reserve other values. - * \param[in] methods The method table of the driver. This structure must - * remain valid for as long as the cryptography - * module keeps running. It is typically a global - * constant. - * - * \return #PSA_SUCCESS - * The driver was successfully registered. Applications can now - * use \p location to access keys through the methods passed to - * this function. - * \return #PSA_ERROR_BAD_STATE - * This function was called after the initialization of the - * cryptography module, and this implementation does not support - * driver registration at this stage. - * \return #PSA_ERROR_ALREADY_EXISTS - * There is already a registered driver for this value of \p location. - * \return #PSA_ERROR_INVALID_ARGUMENT - * \p location is a reserved value. - * \return #PSA_ERROR_NOT_SUPPORTED - * `methods->hal_version` is not supported by this implementation. - * \return #PSA_ERROR_INSUFFICIENT_MEMORY - * \return #PSA_ERROR_NOT_PERMITTED - * \return #PSA_ERROR_STORAGE_FAILURE - * \return #PSA_ERROR_DATA_CORRUPT - */ -psa_status_t psa_register_se_driver( - psa_key_location_t location, - const psa_drv_se_t *methods); - -/**@}*/ - -#ifdef __cplusplus -} -#endif - -#endif /* PSA_CRYPTO_SE_DRIVER_H */ |