psa_ps_get()

psa_status_t psa_ps_get	(	psa_storage_uid_t	uid,
		size_t	data_offset,
		size_t	data_size,
		void *	p_data,
		size_t *	p_data_length )

#include <subsys/trusted_storage/include/psa/protected_storage.h>

Retrieve data associated with a provided uid.

Retrieves up to data_size bytes of the data associated with uid, starting at data_offset bytes from the beginning of the data. Upon successful completion, the data will be placed in the p_data buffer, which must be at least data_size bytes in size. The length of the data returned will be in p_data_length. If data_size is 0, the contents of p_data_length will be set to zero.

Parameters

[in]	uid	The uid value
[in]	data_offset	The starting offset of the data requested
[in]	data_size	The amount of data requested
[out]	p_data	On success, the buffer where the data will be placed
[out]	p_data_length	On success, this will contain size of the data placed in p_data

Returns

A status indicating the success/failure of the operation

Return values

PSA_SUCCESS	The operation completed successfully
PSA_ERROR_INVALID_ARGUMENT	The operation failed because one of the provided arguments (p_data, p_data_length) is invalid, for example is NULL or references memory the caller cannot access. In addition, this can also happen if data_offset is larger than the size of the data associated with uid
PSA_ERROR_DOES_NOT_EXIST	The operation failed because the provided uid value was not found in the storage
PSA_ERROR_STORAGE_FAILURE	The operation failed because the physical storage has failed (Fatal error)
PSA_ERROR_GENERIC_ERROR	The operation failed because of an unspecified internal failure
PSA_ERROR_DATA_CORRUPT	The operation failed because the data associated with the UID was corrupt
PSA_ERROR_INVALID_SIGNATURE	The operation failed because the data associated with the UID failed authentication