This example uses the PSA Crypto API to perform Authenticated Encryption with Associated Data (AEAD) 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 payload sizes are supported in this example:
PLAIN_MSG_SIZE/16PLAIN_MSG_SIZE/4PLAIN_MSG_SIZEThe default PLAIN_MSG_SIZE is 4096, it is defined in app_psa_crypto_aead.h.
The following AEAD algorithms are supported in this example:
PSA_ALG_CCM (single-part)PSA_ALG_GCM (single-part)PSA_ALG_CHACHA20_POLY1305 (single-part)The PSA_ALG_CHACHA20_POLY1305 can only use a 256-bit key.
The following PSA Crypto APIs are used in this example:
psa_crypto_initpsa_key_attributes_initpsa_set_key_typepsa_set_key_bitspsa_set_key_usage_flagspsa_set_key_algorithmpsa_set_key_idpsa_set_key_lifetimepsa_generate_keypsa_get_key_attributespsa_get_key_algorithmpsa_reset_key_attributespsa_destroy_keypsa_generate_randompsa_hash_computepsa_hash_comparepsa_aead_encryptpsa_aead_decryptmbedtls_psa_crypto_freeAdapter 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 value in app_process.h if this key ID had already existed in NVM3.Optimize for debugging (-Og) on Simplicity IDE and None on IAR Embedded Workbench.