psa_crypto_driver_wrappers.c

Go to the documentation of this file.

Go to the SVN repository for this file.

/*
 *  Functions to delegate cryptographic operations to an available
 *  and appropriate accelerator.
 *  Warning: This file will be auto-generated in the future.
 */
/*  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
 
#include "psa_crypto_aead.h"
#include "psa_crypto_cipher.h"
#include "psa_crypto_core.h"
#include "psa_crypto_driver_wrappers.h"
#include "psa_crypto_hash.h"
#include "psa_crypto_mac.h"
 
#include "mbedtls/platform.h"
 
#if defined(MBEDTLS_PSA_CRYPTO_C)
 
#if defined(MBEDTLS_PSA_CRYPTO_DRIVERS)
 
/* Include test driver definition when running tests */
#if defined(PSA_CRYPTO_DRIVER_TEST)
#ifndef PSA_CRYPTO_DRIVER_PRESENT
#define PSA_CRYPTO_DRIVER_PRESENT
#endif
#ifndef PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT
#define PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT
#endif
#include "test/drivers/test_driver.h"
#endif /* PSA_CRYPTO_DRIVER_TEST */
 
/* Repeat above block for each JSON-declared driver during autogeneration */
#endif /* MBEDTLS_PSA_CRYPTO_DRIVERS */
 
/* Auto-generated values depending on which drivers are registered.
 * ID 0 is reserved for unallocated operations.
 * ID 1 is reserved for the Mbed TLS software driver. */
#define PSA_CRYPTO_MBED_TLS_DRIVER_ID (1)
 
#if defined(PSA_CRYPTO_DRIVER_TEST)
#define PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID (2)
#define PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID (3)
#endif /* PSA_CRYPTO_DRIVER_TEST */
 
/* Support the 'old' SE interface when asked to */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
/* PSA_CRYPTO_DRIVER_PRESENT is defined when either a new-style or old-style
 * SE driver is present, to avoid unused argument errors at compile time. */
#ifndef PSA_CRYPTO_DRIVER_PRESENT
#define PSA_CRYPTO_DRIVER_PRESENT
#endif
#include "psa_crypto_se.h"
#endif
 
psa_status_t psa_driver_wrapper_init(void)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    status = psa_init_all_se_drivers();
    if (status != PSA_SUCCESS) {
        return status;
    }
#endif
 
#if defined(PSA_CRYPTO_DRIVER_TEST)
    status = mbedtls_test_transparent_init();
    if (status != PSA_SUCCESS) {
        return status;
    }
 
    status = mbedtls_test_opaque_init();
    if (status != PSA_SUCCESS) {
        return status;
    }
#endif
 
    (void) status;
    return PSA_SUCCESS;
}
 
void psa_driver_wrapper_free(void)
{
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    /* Unregister all secure element drivers, so that we restart from
     * a pristine state. */
    psa_unregister_all_se_drivers();
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
 
#if defined(PSA_CRYPTO_DRIVER_TEST)
    mbedtls_test_transparent_free();
    mbedtls_test_opaque_free();
#endif
}
 
/* Start delegation functions */
psa_status_t psa_driver_wrapper_sign_message(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer,
    size_t key_buffer_size,
    psa_algorithm_t alg,
    const uint8_t *input,
    size_t input_length,
    uint8_t *signature,
    size_t signature_size,
    size_t *signature_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_signature_sign_message(
                attributes,
                key_buffer,
                key_buffer_size,
                alg,
                input,
                input_length,
                signature,
                signature_size,
                signature_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
            break;
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            status = mbedtls_test_opaque_signature_sign_message(
                attributes,
                key_buffer,
                key_buffer_size,
                alg,
                input,
                input_length,
                signature,
                signature_size,
                signature_length);
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
            break;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            break;
    }
 
    return psa_sign_message_builtin(attributes,
                                    key_buffer,
                                    key_buffer_size,
                                    alg,
                                    input,
                                    input_length,
                                    signature,
                                    signature_size,
                                    signature_length);
}
 
psa_status_t psa_driver_wrapper_verify_message(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer,
    size_t key_buffer_size,
    psa_algorithm_t alg,
    const uint8_t *input,
    size_t input_length,
    const uint8_t *signature,
    size_t signature_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_signature_verify_message(
                attributes,
                key_buffer,
                key_buffer_size,
                alg,
                input,
                input_length,
                signature,
                signature_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
            break;
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_signature_verify_message(
                attributes,
                key_buffer,
                key_buffer_size,
                alg,
                input,
                input_length,
                signature,
                signature_length);
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
            break;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            break;
    }
 
    return psa_verify_message_builtin(attributes,
                                      key_buffer,
                                      key_buffer_size,
                                      alg,
                                      input,
                                      input_length,
                                      signature,
                                      signature_length);
}
 
psa_status_t psa_driver_wrapper_sign_hash(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
    uint8_t *signature, size_t signature_size, size_t *signature_length)
{
    /* Try dynamically-registered SE interface first */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    const psa_drv_se_t *drv;
    psa_drv_se_context_t *drv_context;
 
    if (psa_get_se_driver(attributes->core.lifetime, &drv, &drv_context)) {
        if (drv->asymmetric == NULL ||
            drv->asymmetric->p_sign == NULL) {
            /* Key is defined in SE, but we have no way to exercise it */
            return PSA_ERROR_NOT_SUPPORTED;
        }
        return drv->asymmetric->p_sign(
            drv_context, *((psa_key_slot_number_t *) key_buffer),
            alg, hash, hash_length,
            signature, signature_size, signature_length);
    }
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
 
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_signature_sign_hash(attributes,
                                                                  key_buffer,
                                                                  key_buffer_size,
                                                                  alg,
                                                                  hash,
                                                                  hash_length,
                                                                  signature,
                                                                  signature_size,
                                                                  signature_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
            /* Fell through, meaning no accelerator supports this operation */
            return psa_sign_hash_builtin(attributes,
                                         key_buffer,
                                         key_buffer_size,
                                         alg,
                                         hash,
                                         hash_length,
                                         signature,
                                         signature_size,
                                         signature_length);
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_signature_sign_hash(attributes,
                                                           key_buffer,
                                                           key_buffer_size,
                                                           alg,
                                                           hash,
                                                           hash_length,
                                                           signature,
                                                           signature_size,
                                                           signature_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_verify_hash(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    psa_algorithm_t alg, const uint8_t *hash, size_t hash_length,
    const uint8_t *signature, size_t signature_length)
{
    /* Try dynamically-registered SE interface first */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    const psa_drv_se_t *drv;
    psa_drv_se_context_t *drv_context;
 
    if (psa_get_se_driver(attributes->core.lifetime, &drv, &drv_context)) {
        if (drv->asymmetric == NULL ||
            drv->asymmetric->p_verify == NULL) {
            /* Key is defined in SE, but we have no way to exercise it */
            return PSA_ERROR_NOT_SUPPORTED;
        }
        return drv->asymmetric->p_verify(
            drv_context, *((psa_key_slot_number_t *) key_buffer),
            alg, hash, hash_length,
            signature, signature_length);
    }
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
 
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_signature_verify_hash(
                attributes,
                key_buffer,
                key_buffer_size,
                alg,
                hash,
                hash_length,
                signature,
                signature_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
            return psa_verify_hash_builtin(attributes,
                                           key_buffer,
                                           key_buffer_size,
                                           alg,
                                           hash,
                                           hash_length,
                                           signature,
                                           signature_length);
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_signature_verify_hash(attributes,
                                                             key_buffer,
                                                             key_buffer_size,
                                                             alg,
                                                             hash,
                                                             hash_length,
                                                             signature,
                                                             signature_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
/** Get the key buffer size required to store the key material of a key
 *  associated with an opaque driver without storage.
 *
 * \param[in] attributes  The key attributes.
 * \param[out] key_buffer_size  Minimum buffer size to contain the key material
 *
 * \retval #PSA_SUCCESS
 *         The minimum size for a buffer to contain the key material has been
 *         returned successfully.
 * \retval #PSA_ERROR_INVALID_ARGUMENT
 *         The size in bits of the key is not valid.
 * \retval #PSA_ERROR_NOT_SUPPORTED
 *         The type and/or the size in bits of the key or the combination of
 *         the two is not supported.
 */
psa_status_t psa_driver_wrapper_get_key_buffer_size(
    const psa_key_attributes_t *attributes,
    size_t *key_buffer_size)
{
    psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
    psa_key_type_t key_type = attributes->core.type;
    size_t key_bits = attributes->core.bits;
 
    *key_buffer_size = 0;
    switch (location) {
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
#if defined(MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS)
            /* Emulate property 'builtin_key_size' */
            if (psa_key_id_is_builtin(
                    MBEDTLS_SVC_KEY_ID_GET_KEY_ID(
                        psa_get_key_id(attributes)))) {
                *key_buffer_size = sizeof(psa_drv_slot_number_t);
                return PSA_SUCCESS;
            }
#endif /* MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS */
            *key_buffer_size = mbedtls_test_size_function(key_type, key_bits);
            return (*key_buffer_size != 0) ?
                   PSA_SUCCESS : PSA_ERROR_NOT_SUPPORTED;
#endif /* PSA_CRYPTO_DRIVER_TEST */
 
        default:
            (void) key_type;
            (void) key_bits;
            return PSA_ERROR_NOT_SUPPORTED;
    }
}
 
psa_status_t psa_driver_wrapper_generate_key(
    const psa_key_attributes_t *attributes,
    uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    /* Try dynamically-registered SE interface first */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    const psa_drv_se_t *drv;
    psa_drv_se_context_t *drv_context;
 
    if (psa_get_se_driver(attributes->core.lifetime, &drv, &drv_context)) {
        size_t pubkey_length = 0; /* We don't support this feature yet */
        if (drv->key_management == NULL ||
            drv->key_management->p_generate == NULL) {
            /* Key is defined as being in SE, but we have no way to generate it */
            return PSA_ERROR_NOT_SUPPORTED;
        }
        return drv->key_management->p_generate(
            drv_context,
            *((psa_key_slot_number_t *) key_buffer),
            attributes, NULL, 0, &pubkey_length);
    }
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
            /* Transparent drivers are limited to generating asymmetric keys */
            if (PSA_KEY_TYPE_IS_ASYMMETRIC(attributes->core.type)) {
                /* Cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_DRIVER_TEST)
                status = mbedtls_test_transparent_generate_key(
                    attributes, key_buffer, key_buffer_size,
                    key_buffer_length);
                /* Declared with fallback == true */
                if (status != PSA_ERROR_NOT_SUPPORTED) {
                    break;
                }
#endif /* PSA_CRYPTO_DRIVER_TEST */
            }
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
            /* Software fallback */
            status = psa_generate_key_internal(
                attributes, key_buffer, key_buffer_size, key_buffer_length);
            break;
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            status = mbedtls_test_opaque_generate_key(
                attributes, key_buffer, key_buffer_size, key_buffer_length);
            break;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
        default:
            /* Key is declared with a lifetime not known to us */
            status = PSA_ERROR_INVALID_ARGUMENT;
            break;
    }
 
    return status;
}
 
psa_status_t psa_driver_wrapper_import_key(
    const psa_key_attributes_t *attributes,
    const uint8_t *data,
    size_t data_length,
    uint8_t *key_buffer,
    size_t key_buffer_size,
    size_t *key_buffer_length,
    size_t *bits)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(
        psa_get_key_lifetime(attributes));
 
    /* Try dynamically-registered SE interface first */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    const psa_drv_se_t *drv;
    psa_drv_se_context_t *drv_context;
 
    if (psa_get_se_driver(attributes->core.lifetime, &drv, &drv_context)) {
        if (drv->key_management == NULL ||
            drv->key_management->p_import == NULL) {
            return PSA_ERROR_NOT_SUPPORTED;
        }
 
        /* The driver should set the number of key bits, however in
         * case it doesn't, we initialize bits to an invalid value. */
        *bits = PSA_MAX_KEY_BITS + 1;
        status = drv->key_management->p_import(
            drv_context,
            *((psa_key_slot_number_t *) key_buffer),
            attributes, data, data_length, bits);
 
        if (status != PSA_SUCCESS) {
            return status;
        }
 
        if ((*bits) > PSA_MAX_KEY_BITS) {
            return PSA_ERROR_NOT_SUPPORTED;
        }
 
        return PSA_SUCCESS;
    }
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_import_key(
                attributes,
                data, data_length,
                key_buffer, key_buffer_size,
                key_buffer_length, bits);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
            /* Fell through, meaning no accelerator supports this operation */
            return psa_import_key_into_slot(attributes,
                                            data, data_length,
                                            key_buffer, key_buffer_size,
                                            key_buffer_length, bits);
 
        default:
            /* Importing a key with external storage in not yet supported.
             * Return in error indicating that the lifetime is not valid. */
            (void) status;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
 
}
 
psa_status_t psa_driver_wrapper_export_key(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    uint8_t *data, size_t data_size, size_t *data_length)
 
{
    psa_status_t status = PSA_ERROR_INVALID_ARGUMENT;
    psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(
        psa_get_key_lifetime(attributes));
 
    /* Try dynamically-registered SE interface first */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    const psa_drv_se_t *drv;
    psa_drv_se_context_t *drv_context;
 
    if (psa_get_se_driver(attributes->core.lifetime, &drv, &drv_context)) {
        if ((drv->key_management == NULL) ||
            (drv->key_management->p_export == NULL)) {
            return PSA_ERROR_NOT_SUPPORTED;
        }
 
        return drv->key_management->p_export(
            drv_context,
            *((psa_key_slot_number_t *) key_buffer),
            data, data_size, data_length);
    }
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            return psa_export_key_internal(attributes,
                                           key_buffer,
                                           key_buffer_size,
                                           data,
                                           data_size,
                                           data_length);
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_export_key(attributes,
                                                  key_buffer,
                                                  key_buffer_size,
                                                  data,
                                                  data_size,
                                                  data_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            return status;
    }
}
 
psa_status_t psa_driver_wrapper_export_public_key(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    uint8_t *data, size_t data_size, size_t *data_length)
 
{
    psa_status_t status = PSA_ERROR_INVALID_ARGUMENT;
    psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(
        psa_get_key_lifetime(attributes));
 
    /* Try dynamically-registered SE interface first */
#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
    const psa_drv_se_t *drv;
    psa_drv_se_context_t *drv_context;
 
    if (psa_get_se_driver(attributes->core.lifetime, &drv, &drv_context)) {
        if ((drv->key_management == NULL) ||
            (drv->key_management->p_export_public == NULL)) {
            return PSA_ERROR_NOT_SUPPORTED;
        }
 
        return drv->key_management->p_export_public(
            drv_context,
            *((psa_key_slot_number_t *) key_buffer),
            data, data_size, data_length);
    }
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_export_public_key(
                attributes,
                key_buffer,
                key_buffer_size,
                data,
                data_size,
                data_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
            /* Fell through, meaning no accelerator supports this operation */
            return psa_export_public_key_internal(attributes,
                                                  key_buffer,
                                                  key_buffer_size,
                                                  data,
                                                  data_size,
                                                  data_length);
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_export_public_key(attributes,
                                                         key_buffer,
                                                         key_buffer_size,
                                                         data,
                                                         data_size,
                                                         data_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            return status;
    }
}
 
psa_status_t psa_driver_wrapper_get_builtin_key(
    psa_drv_slot_number_t slot_number,
    psa_key_attributes_t *attributes,
    uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length)
{
    psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
    switch (location) {
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_get_builtin_key(
                slot_number,
                attributes,
                key_buffer, key_buffer_size, key_buffer_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
        default:
            (void) slot_number;
            (void) key_buffer;
            (void) key_buffer_size;
            (void) key_buffer_length;
            return PSA_ERROR_DOES_NOT_EXIST;
    }
}
 
/*
 * Cipher functions
 */
psa_status_t psa_driver_wrapper_cipher_encrypt(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer,
    size_t key_buffer_size,
    psa_algorithm_t alg,
    const uint8_t *iv,
    size_t iv_length,
    const uint8_t *input,
    size_t input_length,
    uint8_t *output,
    size_t output_size,
    size_t *output_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_cipher_encrypt(attributes,
                                                             key_buffer,
                                                             key_buffer_size,
                                                             alg,
                                                             iv,
                                                             iv_length,
                                                             input,
                                                             input_length,
                                                             output,
                                                             output_size,
                                                             output_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
            return mbedtls_psa_cipher_encrypt(attributes,
                                              key_buffer,
                                              key_buffer_size,
                                              alg,
                                              iv,
                                              iv_length,
                                              input,
                                              input_length,
                                              output,
                                              output_size,
                                              output_length);
#else
            return PSA_ERROR_NOT_SUPPORTED;
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_cipher_encrypt(attributes,
                                                      key_buffer,
                                                      key_buffer_size,
                                                      alg,
                                                      iv,
                                                      iv_length,
                                                      input,
                                                      input_length,
                                                      output,
                                                      output_size,
                                                      output_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            (void) key_buffer;
            (void) key_buffer_size;
            (void) alg;
            (void) iv;
            (void) iv_length;
            (void) input;
            (void) input_length;
            (void) output;
            (void) output_size;
            (void) output_length;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_cipher_decrypt(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer,
    size_t key_buffer_size,
    psa_algorithm_t alg,
    const uint8_t *input,
    size_t input_length,
    uint8_t *output,
    size_t output_size,
    size_t *output_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_cipher_decrypt(attributes,
                                                             key_buffer,
                                                             key_buffer_size,
                                                             alg,
                                                             input,
                                                             input_length,
                                                             output,
                                                             output_size,
                                                             output_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
            return mbedtls_psa_cipher_decrypt(attributes,
                                              key_buffer,
                                              key_buffer_size,
                                              alg,
                                              input,
                                              input_length,
                                              output,
                                              output_size,
                                              output_length);
#else
            return PSA_ERROR_NOT_SUPPORTED;
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            return mbedtls_test_opaque_cipher_decrypt(attributes,
                                                      key_buffer,
                                                      key_buffer_size,
                                                      alg,
                                                      input,
                                                      input_length,
                                                      output,
                                                      output_size,
                                                      output_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            (void) key_buffer;
            (void) key_buffer_size;
            (void) alg;
            (void) input;
            (void) input_length;
            (void) output;
            (void) output_size;
            (void) output_length;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_cipher_encrypt_setup(
    psa_cipher_operation_t *operation,
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    psa_algorithm_t alg)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_cipher_encrypt_setup(
                &operation->ctx.transparent_test_driver_ctx,
                attributes,
                key_buffer,
                key_buffer_size,
                alg);
            /* Declared with fallback == true */
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID;
            }
 
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
            /* Fell through, meaning no accelerator supports this operation */
            status = mbedtls_psa_cipher_encrypt_setup(&operation->ctx.mbedtls_ctx,
                                                      attributes,
                                                      key_buffer,
                                                      key_buffer_size,
                                                      alg);
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_MBED_TLS_DRIVER_ID;
            }
 
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
            return PSA_ERROR_NOT_SUPPORTED;
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            status = mbedtls_test_opaque_cipher_encrypt_setup(
                &operation->ctx.opaque_test_driver_ctx,
                attributes,
                key_buffer, key_buffer_size,
                alg);
 
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID;
            }
 
            return status;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            (void) operation;
            (void) key_buffer;
            (void) key_buffer_size;
            (void) alg;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_cipher_decrypt_setup(
    psa_cipher_operation_t *operation,
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    psa_algorithm_t alg)
{
    psa_status_t status = PSA_ERROR_INVALID_ARGUMENT;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_cipher_decrypt_setup(
                &operation->ctx.transparent_test_driver_ctx,
                attributes,
                key_buffer,
                key_buffer_size,
                alg);
            /* Declared with fallback == true */
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID;
            }
 
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
            /* Fell through, meaning no accelerator supports this operation */
            status = mbedtls_psa_cipher_decrypt_setup(&operation->ctx.mbedtls_ctx,
                                                      attributes,
                                                      key_buffer,
                                                      key_buffer_size,
                                                      alg);
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_MBED_TLS_DRIVER_ID;
            }
 
            return status;
#else /* MBEDTLS_PSA_BUILTIN_CIPHER */
            return PSA_ERROR_NOT_SUPPORTED;
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            status = mbedtls_test_opaque_cipher_decrypt_setup(
                &operation->ctx.opaque_test_driver_ctx,
                attributes,
                key_buffer, key_buffer_size,
                alg);
 
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID;
            }
 
            return status;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            (void) operation;
            (void) key_buffer;
            (void) key_buffer_size;
            (void) alg;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_cipher_set_iv(
    psa_cipher_operation_t *operation,
    const uint8_t *iv,
    size_t iv_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_cipher_set_iv(&operation->ctx.mbedtls_ctx,
                                             iv,
                                             iv_length);
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_cipher_set_iv(
                &operation->ctx.transparent_test_driver_ctx,
                iv, iv_length);
 
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            return mbedtls_test_opaque_cipher_set_iv(
                &operation->ctx.opaque_test_driver_ctx,
                iv, iv_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
    }
 
    (void) iv;
    (void) iv_length;
 
    return PSA_ERROR_INVALID_ARGUMENT;
}
 
psa_status_t psa_driver_wrapper_cipher_update(
    psa_cipher_operation_t *operation,
    const uint8_t *input,
    size_t input_length,
    uint8_t *output,
    size_t output_size,
    size_t *output_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_cipher_update(&operation->ctx.mbedtls_ctx,
                                             input,
                                             input_length,
                                             output,
                                             output_size,
                                             output_length);
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_cipher_update(
                &operation->ctx.transparent_test_driver_ctx,
                input, input_length,
                output, output_size, output_length);
 
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            return mbedtls_test_opaque_cipher_update(
                &operation->ctx.opaque_test_driver_ctx,
                input, input_length,
                output, output_size, output_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
    }
 
    (void) input;
    (void) input_length;
    (void) output;
    (void) output_size;
    (void) output_length;
 
    return PSA_ERROR_INVALID_ARGUMENT;
}
 
psa_status_t psa_driver_wrapper_cipher_finish(
    psa_cipher_operation_t *operation,
    uint8_t *output,
    size_t output_size,
    size_t *output_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_cipher_finish(&operation->ctx.mbedtls_ctx,
                                             output,
                                             output_size,
                                             output_length);
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_cipher_finish(
                &operation->ctx.transparent_test_driver_ctx,
                output, output_size, output_length);
 
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            return mbedtls_test_opaque_cipher_finish(
                &operation->ctx.opaque_test_driver_ctx,
                output, output_size, output_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
    }
 
    (void) output;
    (void) output_size;
    (void) output_length;
 
    return PSA_ERROR_INVALID_ARGUMENT;
}
 
psa_status_t psa_driver_wrapper_cipher_abort(
    psa_cipher_operation_t *operation)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_CIPHER)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_cipher_abort(&operation->ctx.mbedtls_ctx);
#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            status = mbedtls_test_transparent_cipher_abort(
                &operation->ctx.transparent_test_driver_ctx);
            mbedtls_platform_zeroize(
                &operation->ctx.transparent_test_driver_ctx,
                sizeof(operation->ctx.transparent_test_driver_ctx));
            return status;
 
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            status = mbedtls_test_opaque_cipher_abort(
                &operation->ctx.opaque_test_driver_ctx);
            mbedtls_platform_zeroize(
                &operation->ctx.opaque_test_driver_ctx,
                sizeof(operation->ctx.opaque_test_driver_ctx));
            return status;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
    }
 
    (void) status;
    return PSA_ERROR_INVALID_ARGUMENT;
}
 
/*
 * Hashing functions
 */
psa_status_t psa_driver_wrapper_hash_compute(
    psa_algorithm_t alg,
    const uint8_t *input,
    size_t input_length,
    uint8_t *hash,
    size_t hash_size,
    size_t *hash_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 
    /* Try accelerators first */
#if defined(PSA_CRYPTO_DRIVER_TEST)
    status = mbedtls_test_transparent_hash_compute(
        alg, input, input_length, hash, hash_size, hash_length);
    if (status != PSA_ERROR_NOT_SUPPORTED) {
        return status;
    }
#endif
 
    /* If software fallback is compiled in, try fallback */
#if defined(MBEDTLS_PSA_BUILTIN_HASH)
    status = mbedtls_psa_hash_compute(alg, input, input_length,
                                      hash, hash_size, hash_length);
    if (status != PSA_ERROR_NOT_SUPPORTED) {
        return status;
    }
#endif
    (void) status;
    (void) alg;
    (void) input;
    (void) input_length;
    (void) hash;
    (void) hash_size;
    (void) hash_length;
 
    return PSA_ERROR_NOT_SUPPORTED;
}
 
psa_status_t psa_driver_wrapper_hash_setup(
    psa_hash_operation_t *operation,
    psa_algorithm_t alg)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
 
    /* Try setup on accelerators first */
#if defined(PSA_CRYPTO_DRIVER_TEST)
    status = mbedtls_test_transparent_hash_setup(
        &operation->ctx.test_driver_ctx, alg);
    if (status == PSA_SUCCESS) {
        operation->id = PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID;
    }
 
    if (status != PSA_ERROR_NOT_SUPPORTED) {
        return status;
    }
#endif
 
    /* If software fallback is compiled in, try fallback */
#if defined(MBEDTLS_PSA_BUILTIN_HASH)
    status = mbedtls_psa_hash_setup(&operation->ctx.mbedtls_ctx, alg);
    if (status == PSA_SUCCESS) {
        operation->id = PSA_CRYPTO_MBED_TLS_DRIVER_ID;
    }
 
    if (status != PSA_ERROR_NOT_SUPPORTED) {
        return status;
    }
#endif
    /* Nothing left to try if we fall through here */
    (void) status;
    (void) operation;
    (void) alg;
    return PSA_ERROR_NOT_SUPPORTED;
}
 
psa_status_t psa_driver_wrapper_hash_clone(
    const psa_hash_operation_t *source_operation,
    psa_hash_operation_t *target_operation)
{
    switch (source_operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_HASH)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            target_operation->id = PSA_CRYPTO_MBED_TLS_DRIVER_ID;
            return mbedtls_psa_hash_clone(&source_operation->ctx.mbedtls_ctx,
                                          &target_operation->ctx.mbedtls_ctx);
#endif
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            target_operation->id = PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID;
            return mbedtls_test_transparent_hash_clone(
                &source_operation->ctx.test_driver_ctx,
                &target_operation->ctx.test_driver_ctx);
#endif
        default:
            (void) target_operation;
            return PSA_ERROR_BAD_STATE;
    }
}
 
psa_status_t psa_driver_wrapper_hash_update(
    psa_hash_operation_t *operation,
    const uint8_t *input,
    size_t input_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_HASH)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_hash_update(&operation->ctx.mbedtls_ctx,
                                           input, input_length);
#endif
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_hash_update(
                &operation->ctx.test_driver_ctx,
                input, input_length);
#endif
        default:
            (void) input;
            (void) input_length;
            return PSA_ERROR_BAD_STATE;
    }
}
 
psa_status_t psa_driver_wrapper_hash_finish(
    psa_hash_operation_t *operation,
    uint8_t *hash,
    size_t hash_size,
    size_t *hash_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_HASH)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_hash_finish(&operation->ctx.mbedtls_ctx,
                                           hash, hash_size, hash_length);
#endif
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_hash_finish(
                &operation->ctx.test_driver_ctx,
                hash, hash_size, hash_length);
#endif
        default:
            (void) hash;
            (void) hash_size;
            (void) hash_length;
            return PSA_ERROR_BAD_STATE;
    }
}
 
psa_status_t psa_driver_wrapper_hash_abort(
    psa_hash_operation_t *operation)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_HASH)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_hash_abort(&operation->ctx.mbedtls_ctx);
#endif
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_hash_abort(
                &operation->ctx.test_driver_ctx);
#endif
        default:
            return PSA_ERROR_BAD_STATE;
    }
}
 
psa_status_t psa_driver_wrapper_aead_encrypt(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    psa_algorithm_t alg,
    const uint8_t *nonce, size_t nonce_length,
    const uint8_t *additional_data, size_t additional_data_length,
    const uint8_t *plaintext, size_t plaintext_length,
    uint8_t *ciphertext, size_t ciphertext_size, size_t *ciphertext_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_aead_encrypt(
                attributes, key_buffer, key_buffer_size,
                alg,
                nonce, nonce_length,
                additional_data, additional_data_length,
                plaintext, plaintext_length,
                ciphertext, ciphertext_size, ciphertext_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
            /* Fell through, meaning no accelerator supports this operation */
            return mbedtls_psa_aead_encrypt(
                attributes, key_buffer, key_buffer_size,
                alg,
                nonce, nonce_length,
                additional_data, additional_data_length,
                plaintext, plaintext_length,
                ciphertext, ciphertext_size, ciphertext_length);
 
        /* Add cases for opaque driver here */
 
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_aead_decrypt(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer, size_t key_buffer_size,
    psa_algorithm_t alg,
    const uint8_t *nonce, size_t nonce_length,
    const uint8_t *additional_data, size_t additional_data_length,
    const uint8_t *ciphertext, size_t ciphertext_length,
    uint8_t *plaintext, size_t plaintext_size, size_t *plaintext_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_aead_decrypt(
                attributes, key_buffer, key_buffer_size,
                alg,
                nonce, nonce_length,
                additional_data, additional_data_length,
                ciphertext, ciphertext_length,
                plaintext, plaintext_size, plaintext_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 
            /* Fell through, meaning no accelerator supports this operation */
            return mbedtls_psa_aead_decrypt(
                attributes, key_buffer, key_buffer_size,
                alg,
                nonce, nonce_length,
                additional_data, additional_data_length,
                ciphertext, ciphertext_length,
                plaintext, plaintext_size, plaintext_length);
 
        /* Add cases for opaque driver here */
 
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
 
/*
 * MAC functions
 */
psa_status_t psa_driver_wrapper_mac_compute(
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer,
    size_t key_buffer_size,
    psa_algorithm_t alg,
    const uint8_t *input,
    size_t input_length,
    uint8_t *mac,
    size_t mac_size,
    size_t *mac_length)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_mac_compute(
                attributes, key_buffer, key_buffer_size, alg,
                input, input_length,
                mac, mac_size, mac_length);
            /* Declared with fallback == true */
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
#if defined(MBEDTLS_PSA_BUILTIN_MAC)
            /* Fell through, meaning no accelerator supports this operation */
            status = mbedtls_psa_mac_compute(
                attributes, key_buffer, key_buffer_size, alg,
                input, input_length,
                mac, mac_size, mac_length);
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* MBEDTLS_PSA_BUILTIN_MAC */
            return PSA_ERROR_NOT_SUPPORTED;
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            status = mbedtls_test_opaque_mac_compute(
                attributes, key_buffer, key_buffer_size, alg,
                input, input_length,
                mac, mac_size, mac_length);
            return status;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) key_buffer;
            (void) key_buffer_size;
            (void) alg;
            (void) input;
            (void) input_length;
            (void) mac;
            (void) mac_size;
            (void) mac_length;
            (void) status;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_mac_sign_setup(
    psa_mac_operation_t *operation,
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer,
    size_t key_buffer_size,
    psa_algorithm_t alg)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_mac_sign_setup(
                &operation->ctx.transparent_test_driver_ctx,
                attributes,
                key_buffer, key_buffer_size,
                alg);
            /* Declared with fallback == true */
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID;
            }
 
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
#if defined(MBEDTLS_PSA_BUILTIN_MAC)
            /* Fell through, meaning no accelerator supports this operation */
            status = mbedtls_psa_mac_sign_setup(&operation->ctx.mbedtls_ctx,
                                                attributes,
                                                key_buffer, key_buffer_size,
                                                alg);
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_MBED_TLS_DRIVER_ID;
            }
 
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* MBEDTLS_PSA_BUILTIN_MAC */
            return PSA_ERROR_NOT_SUPPORTED;
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            status = mbedtls_test_opaque_mac_sign_setup(
                &operation->ctx.opaque_test_driver_ctx,
                attributes,
                key_buffer, key_buffer_size,
                alg);
 
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID;
            }
 
            return status;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            (void) operation;
            (void) key_buffer;
            (void) key_buffer_size;
            (void) alg;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_mac_verify_setup(
    psa_mac_operation_t *operation,
    const psa_key_attributes_t *attributes,
    const uint8_t *key_buffer,
    size_t key_buffer_size,
    psa_algorithm_t alg)
{
    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
    psa_key_location_t location =
        PSA_KEY_LIFETIME_GET_LOCATION(attributes->core.lifetime);
 
    switch (location) {
        case PSA_KEY_LOCATION_LOCAL_STORAGE:
            /* Key is stored in the slot in export representation, so
             * cycle through all known transparent accelerators */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
            status = mbedtls_test_transparent_mac_verify_setup(
                &operation->ctx.transparent_test_driver_ctx,
                attributes,
                key_buffer, key_buffer_size,
                alg);
            /* Declared with fallback == true */
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID;
            }
 
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
#if defined(MBEDTLS_PSA_BUILTIN_MAC)
            /* Fell through, meaning no accelerator supports this operation */
            status = mbedtls_psa_mac_verify_setup(&operation->ctx.mbedtls_ctx,
                                                  attributes,
                                                  key_buffer, key_buffer_size,
                                                  alg);
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_MBED_TLS_DRIVER_ID;
            }
 
            if (status != PSA_ERROR_NOT_SUPPORTED) {
                return status;
            }
#endif /* MBEDTLS_PSA_BUILTIN_MAC */
            return PSA_ERROR_NOT_SUPPORTED;
 
            /* Add cases for opaque driver here */
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TEST_DRIVER_LOCATION:
            status = mbedtls_test_opaque_mac_verify_setup(
                &operation->ctx.opaque_test_driver_ctx,
                attributes,
                key_buffer, key_buffer_size,
                alg);
 
            if (status == PSA_SUCCESS) {
                operation->id = PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID;
            }
 
            return status;
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            /* Key is declared with a lifetime not known to us */
            (void) status;
            (void) operation;
            (void) key_buffer;
            (void) key_buffer_size;
            (void) alg;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_mac_update(
    psa_mac_operation_t *operation,
    const uint8_t *input,
    size_t input_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_MAC)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_mac_update(&operation->ctx.mbedtls_ctx,
                                          input, input_length);
#endif /* MBEDTLS_PSA_BUILTIN_MAC */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_mac_update(
                &operation->ctx.transparent_test_driver_ctx,
                input, input_length);
 
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            return mbedtls_test_opaque_mac_update(
                &operation->ctx.opaque_test_driver_ctx,
                input, input_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            (void) input;
            (void) input_length;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_mac_sign_finish(
    psa_mac_operation_t *operation,
    uint8_t *mac,
    size_t mac_size,
    size_t *mac_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_MAC)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_mac_sign_finish(&operation->ctx.mbedtls_ctx,
                                               mac, mac_size, mac_length);
#endif /* MBEDTLS_PSA_BUILTIN_MAC */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_mac_sign_finish(
                &operation->ctx.transparent_test_driver_ctx,
                mac, mac_size, mac_length);
 
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            return mbedtls_test_opaque_mac_sign_finish(
                &operation->ctx.opaque_test_driver_ctx,
                mac, mac_size, mac_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            (void) mac;
            (void) mac_size;
            (void) mac_length;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_mac_verify_finish(
    psa_mac_operation_t *operation,
    const uint8_t *mac,
    size_t mac_length)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_MAC)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_mac_verify_finish(&operation->ctx.mbedtls_ctx,
                                                 mac, mac_length);
#endif /* MBEDTLS_PSA_BUILTIN_MAC */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_mac_verify_finish(
                &operation->ctx.transparent_test_driver_ctx,
                mac, mac_length);
 
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            return mbedtls_test_opaque_mac_verify_finish(
                &operation->ctx.opaque_test_driver_ctx,
                mac, mac_length);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            (void) mac;
            (void) mac_length;
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
psa_status_t psa_driver_wrapper_mac_abort(
    psa_mac_operation_t *operation)
{
    switch (operation->id) {
#if defined(MBEDTLS_PSA_BUILTIN_MAC)
        case PSA_CRYPTO_MBED_TLS_DRIVER_ID:
            return mbedtls_psa_mac_abort(&operation->ctx.mbedtls_ctx);
#endif /* MBEDTLS_PSA_BUILTIN_MAC */
 
#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
#if defined(PSA_CRYPTO_DRIVER_TEST)
        case PSA_CRYPTO_TRANSPARENT_TEST_DRIVER_ID:
            return mbedtls_test_transparent_mac_abort(
                &operation->ctx.transparent_test_driver_ctx);
        case PSA_CRYPTO_OPAQUE_TEST_DRIVER_ID:
            return mbedtls_test_opaque_mac_abort(
                &operation->ctx.opaque_test_driver_ctx);
#endif /* PSA_CRYPTO_DRIVER_TEST */
#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
        default:
            return PSA_ERROR_INVALID_ARGUMENT;
    }
}
 
#endif /* MBEDTLS_PSA_CRYPTO_C */