This example uses the PSA Crypto API to perform symmetric key operations on the supported device.
The example redirects standard I/O to the virtual serial port (VCOM) of the kit. By default, the serial port setting is 115200 bps and 8-N-1 configuration.
Except for the Series 1 Cortex-M0+ device, the example has been instrumented with code to count the number of clock cycles spent in different operations. The results are printed on the VCOM serial port console. This feature can be disabled by defining PSA_CRYPTO_PRINT=0
(default is 1) in the IDE setting (Preprocessor->Defined symbols
).
The following key storages are supported in this example:
The following key sizes are supported in this example:
The following key usages can be selected in this example:
PSA_KEY_USAGE_EXPORT
PSA_KEY_USAGE_COPY
The following symmetric key algorithms are supported in this example:
PSA_ALG_ECB_NO_PADDING
PSA_ALG_CBC_NO_PADDING
PSA_ALG_CFB
PSA_ALG_CTR
PSA_ALG_CCM
PSA_ALG_GCM
PSA_ALG_CHACHA20
PSA_ALG_CHACHA20_POLY1305
PSA_ALG_CMAC
PSA_ALG_HMAC(hash_alg)
PSA_ALG_HKDF(hash_alg)
The default derived key algorithm is PSA_ALG_CTR
, it is defined in app_process.h
.<br>
The PSA_ALG_CHACHA20
and PSA_ALG_CHACHA20_POLY1305
can only use a 256-bit key.
The following PSA Crypto APIs are used in this example:
psa_crypto_init
psa_key_attributes_init
psa_set_key_type
psa_set_key_bits
psa_set_key_usage_flags
psa_set_key_algorithm
psa_set_key_id
psa_set_key_lifetime
psa_generate_key
psa_import_key
psa_copy_key
psa_reset_key_attributes
psa_export_key
psa_destroy_key
mbedtls_psa_crypto_free
Adapter Firmware
under General Device Information in Simplicity Studio 5 Users Guide).Secure Firmware
under General Device Information in Simplicity Studio 5 Users Guide).Device Console
in Simplicity Studio 5, Line terminator:
must be set to None
).Platform()
checkbox to browse the platform examples).PERSISTENT_KEY_ID
and PERSISTENT_COPY_KEY_ID
values in app_process.h
if these key IDs had already existed in NVM3.PSA_KEY_USAGE_COPY
policy does not apply to the wrapped key.Optimize for debugging (-Og)
on Simplicity IDE and None
on IAR Embedded Workbench.