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SourceVuESP-IDF Framework and ExamplesmbedTLSpsa_parse_key_data_from_storage()

psa_parse_key_data_from_storage() function

Parses persistent storage data into key data and metadata

Syntax

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Summary

Declaration

Definition

from psa_crypto_storage.h:185

psa_status_t psa_parse_key_data_from_storage(const uint8_t *storage_data, size_t storage_data_length, uint8_t **key_data, size_t *key_data_length, psa_key_attributes_t *attr);

Implemented in psa_crypto_storage.c:266

Arguments

Argument

Description

storage_data

Buffer for the storage data.

storage_data_length

Length of the storage data buffer

key_data

On output, pointer to a newly allocated buffer containing the key data. This must be freed using psa_free_persistent_key_data()

key_data_length

Length of the key data buffer

attr

On success, the attribute structure is filled with the loaded key metadata.

Return value

#PSA_SUCCESS \emptydescription #PSA_ERROR_INSUFFICIENT_MEMORY \emptydescription #PSA_ERROR_DATA_INVALID \emptydescription

References

Code

Location

Referrer

psa_status_t psa_parse_key_data_from_storage(const uint8_t *storage_data,

psa_crypto_storage.c:266

psa_status_t psa_parse_key_data_from_storage(const uint8_t *storage_data,

psa_crypto_storage.h:185

status = psa_parse_key_data_from_storage(loaded_data, storage_data_length,

psa_crypto_storage.c:380

psa_load_persistent_key()

Call Tree

psa_parse_key_data_from_storage() is called by 1 function and calls 4 functions:

psa_load_persistent_key()

psa_parse_key_data_from_storage()

mbedtls_calloc()

mbedtls_get_unaligned_uint16()

mbedtls_get_unaligned_uint32()

check_magic_header()

Data Use

psa_parse_key_data_from_storage() reads 8 variables and writes 6 variables:

psa_key_attributes_s::policy

psa_persistent_key_storage_format::version

psa_persistent_key_storage_format::lifetime

psa_persistent_key_storage_format::type

psa_persistent_key_storage_format::bits

psa_persistent_key_storage_format::policy

psa_persistent_key_storage_format::data_len

psa_persistent_key_storage_format::key_data

psa_parse_key_data_from_storage()

psa_key_policy_s::usage

psa_key_policy_s::alg

psa_key_policy_s::alg2

psa_key_attributes_s::type

psa_key_attributes_s::bits

psa_key_attributes_s::lifetime

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Lifecycle

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