transform.h File Reference

The secure storage ITS transform module. More...

#include <zephyr/secure_storage/its/common.h>

Go to the source code of this file.

Macros
#define	SECURE_STORAGE_ITS_TRANSFORM_DATA_SIZE(stored_data_len)

Enumerations
enum	{ SECURE_STORAGE_ITS_TRANSFORM_MAX_STORED_DATA_SIZE }
	The maximum size, in bytes, of an entry's data after it has been transformed for storage. More...

Functions
psa_status_t	secure_storage_its_transform_to_store (secure_storage_its_uid_t uid, size_t data_len, const void *data, secure_storage_packed_create_flags_t create_flags, uint8_t stored_data[static SECURE_STORAGE_ITS_TRANSFORM_MAX_STORED_DATA_SIZE], size_t *stored_data_len)
	Transforms the data of an ITS entry for storage.
psa_status_t	secure_storage_its_transform_from_store (secure_storage_its_uid_t uid, size_t stored_data_len, const uint8_t stored_data[static SECURE_STORAGE_ITS_TRANSFORM_MAX_STORED_DATA_SIZE], size_t data_size, void *data, size_t *data_len, psa_storage_create_flags_t *create_flags)
	Transforms and validates the stored data of an ITS entry for use.

Detailed Description

The secure storage ITS transform module.

The functions declared in this header implement the ITS transform module. They are meant to be called only by the ITS implementation. This header may be included when providing a custom implementation of the ITS transform module (

CONFIG_SECURE_STORAGE_ITS_TRANSFORM_IMPLEMENTATION_CUSTOM 

).

Macro Definition Documentation

SECURE_STORAGE_ITS_TRANSFORM_DATA_SIZE

#define SECURE_STORAGE_ITS_TRANSFORM_DATA_SIZE

(

stored_data_len

)

Value:

        (stored_data_len - (SECURE_STORAGE_ITS_TRANSFORM_MAX_STORED_DATA_SIZE \
                            - CONFIG_SECURE_STORAGE_ITS_MAX_DATA_SIZE))

Enumeration Type Documentation

anonymous enum

anonymous enum

The maximum size, in bytes, of an entry's data after it has been transformed for storage.

Enumerator
SECURE_STORAGE_ITS_TRANSFORM_MAX_STORED_DATA_SIZE

Function Documentation

secure_storage_its_transform_from_store()

psa_status_t secure_storage_its_transform_from_store	(	secure_storage_its_uid_t	uid,
		size_t	stored_data_len,
		const uint8_t	stored_data[static SECURE_STORAGE_ITS_TRANSFORM_MAX_STORED_DATA_SIZE],
		size_t	data_size,
		void *	data,
		size_t *	data_len,
		psa_storage_create_flags_t *	create_flags )

Transforms and validates the stored data of an ITS entry for use.

Parameters

[in]	uid	The entry's UID.
[in]	stored_data_len	The number of bytes in stored_data.
[in]	stored_data	The stored data to transform for use.
[in]	data_size	The size of data in bytes.
[out]	data	The buffer to which the transformed data is written.
[out]	data_len	On success, the number of bytes written to stored_data.
[out]	create_flags	On success, the entry's create flags.

Returns

PSA_SUCCESS on success, anything else on failure.

secure_storage_its_transform_to_store()

psa_status_t secure_storage_its_transform_to_store	(	secure_storage_its_uid_t	uid,
		size_t	data_len,
		const void *	data,
		secure_storage_packed_create_flags_t	create_flags,
		uint8_t	stored_data[static SECURE_STORAGE_ITS_TRANSFORM_MAX_STORED_DATA_SIZE],
		size_t *	stored_data_len )

Transforms the data of an ITS entry for storage.

Parameters

[in]	uid	The entry's UID.
[in]	data_len	The number of bytes in data.
[in]	data	The data to transform for storage.
[in]	create_flags	The entry's create flags. It must contain only valid PSA_STORAGE_FLAG_* values. It gets stored as part of stored_data.
[out]	stored_data	The buffer to which the transformed data is written.
[out]	stored_data_len	On success, the number of bytes written to stored_data.

Returns

PSA_SUCCESS on success, anything else on failure.