mirror of https://github.com/ARMmbed/mbed-os.git
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/* Copyright (c) 2018 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __SECURE_TIME_INTERNAL_H__
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#define __SECURE_TIME_INTERNAL_H__
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*< Maximal allowed blob size in bytes. */
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#define SECURE_TIME_MAX_BLOB_SIZE_BYTES (10 * 1024UL)
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/*< Timestamp size in bytes. */
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#define SECURE_TIME_TIMESTAMP_SIZE_BYTES (8UL)
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/*< Nonce size in bytes. */
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#define SECURE_TIME_NONCE_SIZE_BYTES (8UL)
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/*< The size of delegation length in bytes. */
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#define SECURE_TIME_DELEGATION_LENGTH_SIZE_BYTES (2UL)
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/*< The size of public key length field in bytes. */
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#define SECURE_TIME_PUBKEY_LENGTH_SIZE_BYTES (2UL)
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/*< The size of signature length field in bytes. */
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#define SECURE_TIME_SIGNATURE_LENGTH_SIZE_BYTES (2UL)
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/*< The size of public key length field in bytes. */
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#define SECURE_TIME_PUBKEY_LENGTH_SIZE_BYTES (2UL)
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/*< The size of the constant length blob header. */
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#define SECURE_TIME_BLOB_HEADER_SIZE_BYTES \
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( \
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SECURE_TIME_TIMESTAMP_SIZE_BYTES + \
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SECURE_TIME_NONCE_SIZE_BYTES + \
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SECURE_TIME_DELEGATION_LENGTH_SIZE_BYTES \
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)
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/*< The location of the delegation length field in the blob. */
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#define SECURE_TIME_DELEGATION_LENGTH_OFFSET \
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( \
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SECURE_TIME_TIMESTAMP_SIZE_BYTES + \
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SECURE_TIME_NONCE_SIZE_BYTES \
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)
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#define SECURE_TIME_MIN_RTC_LATENCY_SEC (100UL)
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/*
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* Return the device boot time in seconds since EPOCH.
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*
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* @return 64-bit value of seconds.
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*/
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uint64_t secure_time_get_boot_time(void);
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/*
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* Update the device boot time according to the new time.
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*
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* @param[in] new_time Time value in seconds since EPOCH to update boot time.\n
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* updated_boot_time = new_time - seconds_since_last_boot
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*/
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void secure_time_update_boot_time(uint64_t new_time);
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/*
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* Return how many seconds have passed since last boot.
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*
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* @return 64-bit value of seconds.
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*/
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uint64_t secure_time_get_seconds_since_boot(void);
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/*
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* Update the device RTC time according to the new time.
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*
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* @param[in] new_time Time value in seconds since EPOCH.
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*/
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void secure_time_update_rtc_time(uint64_t new_time);
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/*
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* Return the device RTC time in seconds since EPOCH.
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*
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* @return 64-bit value of seconds, 0 if RTC not supported.
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*/
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uint64_t secure_time_get_rtc_time(void);
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#ifdef __cplusplus
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}
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#endif
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#endif // __SECURE_TIME_INTERNAL_H__
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