refactor!: MbedTLS on Windows, switch to uint32

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 */