secure_fw/services/initial_attestation/tfm_attestation.c

/*
 * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */

#include "tfm_api.h"
#include "tfm_secure_api.h"
#include "attestation.h"
#include "psa/initial_attestation.h"
#include "bl2/include/tfm_boot_status.h"

#ifdef TFM_PSA_API
extern int32_t g_attest_caller_id;
#endif

enum psa_attest_err_t
attest_check_memory_access(void *addr,
                           uint32_t size,
                           enum attest_memory_access_t access)
{
    enum psa_attest_err_t attest_res = PSA_ATTEST_ERR_SUCCESS;
#ifndef TFM_PSA_API
    int32_t tfm_res;

    tfm_res = tfm_core_memory_permission_check(addr, size, (int32_t)access);
    if (tfm_res) {
        attest_res = PSA_ATTEST_ERR_INVALID_INPUT;
    }
#endif

    return attest_res;
}

enum psa_attest_err_t
attest_get_caller_client_id(int32_t *caller_id)
{
    enum psa_attest_err_t attest_res = PSA_ATTEST_ERR_SUCCESS;
#ifndef TFM_PSA_API
    int32_t tfm_res;

    tfm_res = tfm_core_get_caller_client_id(caller_id);
    if (tfm_res) {
        attest_res = PSA_ATTEST_ERR_CLAIM_UNAVAILABLE;
    }
#else
    *caller_id = g_attest_caller_id;
#endif

    return attest_res;
}

enum psa_attest_err_t
attest_get_boot_data(uint8_t major_type,
                     struct tfm_boot_data *boot_data,
                     uint32_t len)
{
    enum psa_attest_err_t attest_res = PSA_ATTEST_ERR_SUCCESS;
    int32_t tfm_res;

    tfm_res = tfm_core_get_boot_data(major_type, boot_data, len);
    if (tfm_res != (int32_t)TFM_SUCCESS) {
        attest_res =  PSA_ATTEST_ERR_INIT_FAILED;
    }

    return attest_res;
}