mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-10 01:30:19 +00:00
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
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#include <stdint.h>
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#include "secbool.h"
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#define SECRET_HEADER_MAGIC "TRZS"
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#define SECRET_HEADER_LEN 16
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#define SECRET_OPTIGA_KEY_OFFSET 16
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#define SECRET_OPTIGA_KEY_LEN 32
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#define SECRET_MONOTONIC_COUNTER_OFFSET 48
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#define SECRET_MONOTONIC_COUNTER_LEN 1024
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#define SECRET_BHK_OFFSET (1024 * 8)
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#define SECRET_BHK_LEN 32
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// Checks if bootloader is locked, that is the secret storage contains optiga
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// pairing secret on platforms where access to the secret storage cannot be
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// restricted for unofficial firmware
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secbool secret_bootloader_locked(void);
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// Writes data to the secret storage
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void secret_write(const uint8_t* data, uint32_t offset, uint32_t len);
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// Reads data from the secret storage
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secbool secret_read(uint8_t* data, uint32_t offset, uint32_t len);
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// Checks if the secret storage has been wiped
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secbool secret_wiped(void);
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// Verifies that the secret storage has correct header
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secbool secret_verify_header(void);
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// Checks that the secret storage is initialized and initializes it if not
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secbool secret_ensure_initialized(void);
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// Erases the entire secret storage
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void secret_erase(void);
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// Disables access to the secret storage until next reset
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void secret_hide(void);
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// Writes the secret header to the secret storage
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void secret_write_header(void);
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// Writes optiga pairing secret to the secret storage
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// Encrypts the secret if encryption is available on the platform
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// Returns true if the secret was written successfully
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secbool secret_optiga_set(const uint8_t secret[SECRET_OPTIGA_KEY_LEN]);
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// Reads optiga pairing secret
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// Decrypts the secret if encryption is available on the platform
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// Returns true if the secret was read successfully
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// Reading can fail if optiga is not paired, the pairing secret was not
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// provisioned to the firmware (by calling secret_optiga_backup), or the secret
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// was made unavailable by calling secret_optiga_hide
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secbool secret_optiga_get(uint8_t dest[SECRET_OPTIGA_KEY_LEN]);
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// Backs up the optiga pairing secret from the secret storage to the backup
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// register
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void secret_optiga_backup(void);
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// Deletes the optiga pairing secret from the register
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void secret_optiga_hide(void);
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// Locks the BHK register. Once locked, the BHK register can't be accessed by
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// the software. BHK is made available to the SAES peripheral
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void secret_bhk_lock(void);
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// Verifies that access to the register has been disabled
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secbool secret_bhk_locked(void);
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// Regenerates the BHK and writes it to the secret storage
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void secret_bhk_regenerate(void);
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// Provision the secret BHK from the secret storage to the BHK register
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// which makes the BHK usable for encryption by the firmware, without having
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// read access to it.
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void secret_bhk_provision(void);
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// Checks that the optiga pairing secret is present in the secret storage.
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// This functions only works when software has access to the secret storage,
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// i.e. in bootloader. Access to secret storage is restricted by calling
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// secret_hide.
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secbool secret_optiga_present(void);
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