modem_attest_token.h

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/*
 * Copyright (c) 2021 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
 
#ifndef MODEM_ATTEST_TOKEN_H__
#define MODEM_ATTEST_TOKEN_H__
 
#include <zephyr/types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct nrf_attestation_token {
        char *attest;
        size_t attest_sz;
 
        char *cose;
        size_t cose_sz;
};
 
enum nrf_id_srvc_msg_type {
        NRF_ID_SRVC_MSG_TYPE_INVALID = -1,
        NRF_ID_SRVC_MSG_TYPE_ID_V1 = 1,
        NRF_ID_SRVC_MSG_TYPE_PROV_RESP_V1 = 5,
        NRF_ID_SRVC_MSG_TYPE_PUB_KEY_V2 = 8,
        NRF_ID_SRVC_MSG_TYPE_CSR_V2 = 9,
};
 
enum nrf_device_type {
        NRF_DEVICE_TYPE_INVALID = -1,
        NRF_DEVICE_TYPE_9160_SIAA = 1,
        NRF_DEVICE_TYPE_9160_SIBA = 2,
        NRF_DEVICE_TYPE_9160_SICA = 3,
};
 
#define NRF_UUID_BYTE_SZ        16
#define NRF_DEVICE_UUID_SZ      NRF_UUID_BYTE_SZ
#define NRF_MODEM_FW_UUID_SZ    NRF_UUID_BYTE_SZ
#define NRF_ATTEST_NONCE_SZ     16
 
/* UUID v4 format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx */
#define NRF_UUID_V4_STR_LEN             ((NRF_UUID_BYTE_SZ * 2) + 4)
#define NRF_DEVICE_UUID_STR_LEN         NRF_UUID_V4_STR_LEN
#define NRF_MODEM_FW_UUID_STR_LEN       NRF_UUID_V4_STR_LEN
 
struct nrf_attestation_data {
        enum nrf_id_srvc_msg_type msg_type;
        enum nrf_device_type dev_type;
 
        char device_uuid[NRF_DEVICE_UUID_SZ];
        char fw_uuid[NRF_MODEM_FW_UUID_SZ];
        char nonce[NRF_ATTEST_NONCE_SZ];
};
 
struct nrf_device_uuid {
        char str[NRF_DEVICE_UUID_STR_LEN + 1];
};
 
struct nrf_modem_fw_uuid {
        char str[NRF_MODEM_FW_UUID_STR_LEN + 1];
};
 
int modem_attest_token_get(struct nrf_attestation_token *const token);
 
void modem_attest_token_free(struct nrf_attestation_token *const token);
 
int modem_attest_token_parse(struct nrf_attestation_token const *const token_in,
                             struct nrf_attestation_data *const data_out);
 
int modem_attest_token_get_uuids(struct nrf_device_uuid *dev,
                                 struct nrf_modem_fw_uuid *mfw);
 
#ifdef __cplusplus
}
#endif
 
#endif /* MODEM_ATTEST_TOKEN_H__ */