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chore(core): add comments to secret.h functions

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tychovrahe 2024-04-05 09:14:56 +02:00 committed by TychoVrahe
parent 8a18cfe0d4
commit a873a7064e
1 changed files with 34 additions and 0 deletions
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34
core/embed/trezorhal/secret.h
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@ -13,38 +13,72 @@
#define SECRET_BHK_OFFSET (1024 * 8)
#define SECRET_BHK_LEN 32
// Checks if bootloader is locked, that is the secret storage contains optiga
// pairing secret on platforms where access to the secret storage cannot be
// restricted for unofficial firmware
secbool secret_bootloader_locked(void);
// Writes data to the secret storage
void secret_write(const uint8_t* data, uint32_t offset, uint32_t len);
// Reads data from the secret storage
secbool secret_read(uint8_t* data, uint32_t offset, uint32_t len);
// Checks if the secret storage has been wiped
secbool secret_wiped(void);
// Verifies that the secret storage has correct header
secbool secret_verify_header(void);
// Checks that the secret storage is initialized and initializes it if not
secbool secret_ensure_initialized(void);
// Erases the entire secret storage
void secret_erase(void);
// Disables access to the secret storage until next reset
void secret_hide(void);
// Writes the secret header to the secret storage
void secret_write_header(void);
// Writes optiga pairing secret to the secret storage
// Encrypts the secret if encryption is available on the platform
// Returns true if the secret was written successfully
secbool secret_optiga_set(const uint8_t secret[SECRET_OPTIGA_KEY_LEN]);
// Reads optiga pairing secret
// Decrypts the secret if encryption is available on the platform
// Returns true if the secret was read successfully
// Reading can fail if optiga is not paired, the pairing secret was not
// provisioned to the firmware (by calling secret_optiga_backup), or the secret
// was made unavailable by calling secret_optiga_hide
secbool secret_optiga_get(uint8_t dest[SECRET_OPTIGA_KEY_LEN]);
// Backs up the optiga pairing secret from the secret storage to the backup
// register
void secret_optiga_backup(void);
// Deletes the optiga pairing secret from the register
void secret_optiga_hide(void);
// Locks the BHK register. Once locked, the BHK register can't be accessed by
// the software. BHK is made available to the SAES peripheral
void secret_bhk_lock(void);
// Verifies that access to the register has been disabled
secbool secret_bhk_locked(void);
// Regenerates the BHK and writes it to the secret storage
void secret_bhk_regenerate(void);
// Provision the secret BHK from the secret storage to the BHK register
// which makes the BHK usable for encryption by the firmware, without having
// read access to it.
void secret_bhk_provision(void);
// Checks that the optiga pairing secret is present in the secret storage.
// This functions only works when software has access to the secret storage,
// i.e. in bootloader. Access to secret storage is restricted by calling
// secret_hide.
secbool secret_optiga_present(void);