General Description

Anti-rollback counter manipulation definitions.

Functions
ifx_se_status_t	ifx_se_get_rollback_counter (ifx_se_fih_t number, ifx_se_fih_ptr_t value, void *ctx)
	This function reads the Anti-rollback counter. More...

ifx_se_status_t	ifx_se_update_rollback_counter (ifx_se_fih_t number, ifx_se_fih_t value, void *ctx)
	Updates the anti-rollback counter to a higher value only. More...

ifx_se_status_t	ifx_se_get_usage_limit_counter (ifx_se_key_id_fih_t key, ifx_se_fih_ptr_t value, void *ctx)
	This function reads the usage limit counter value for the given key. More...

Function Documentation

ifx_se_status_t ifx_se_get_rollback_counter	(	ifx_se_fih_t	number,
		ifx_se_fih_ptr_t	value,
		void *	ctx
	)

This function reads the Anti-rollback counter.

Parameters

[in]	number	Anti-rollback counter number (0-15).
[out]	value	The pointer to the counter value of ifx_se_fih_uint type.
[in]	ctx	The pointer to the SE syscall context that contain a special syscall data (IPC release callback etc).

Note: For OTP counters if the function is called in concurrent environment and RRAM controller is locked by another PC, the function immediately returns an error.

ifx_se_status_t ifx_se_update_rollback_counter	(	ifx_se_fih_t	number,
		ifx_se_fih_t	value,
		void *	ctx
	)

Updates the anti-rollback counter to a higher value only.

Counters 0...7 are stored in OTP. Counters 8...15 are stored in SFLASH.

Parameters

[in]	number	Anti-rollback counter number (0-15).
[in]	value	A new 32-bit counter value.
[in]	ctx	The pointer to the SE syscall context that contain a special syscall data (IPC release callback etc).

Note: For OTP counters if the function is called in concurrent environment and RRAM controller is locked by another PC, the function immediately returns an error.

ifx_se_status_t ifx_se_get_usage_limit_counter	(	ifx_se_key_id_fih_t	key,
		ifx_se_fih_ptr_t	value,
		void *	ctx
	)

This function reads the usage limit counter value for the given key.

Parameters

[in]	key	Identifier of the key which usage limit counter to read.
[out]	value	The pointer to the 32-bit counter value.
[in]	ctx	The pointer to the SE syscall context that contain a special syscall data (IPC release callback etc).