How catch x,y from nrf_crypto_ecc_public_key_t structure

[alireza11048]

Hi to all,

i am developing a device with NRF52840 soc and i am using cryptocell IP to create ecc key pair. as you know public key of an ECC alg is a point on spec curve. for implementing a spec protocl i need to catch X(32 byte),Y(32 byte) from nrf_crypto_ecc_public_key_t structure. i did not find any thing in document that indicate how can i done that. so can an one tell me that how can i catch X,Y from nrf_crypto_ecc_public_key_t structure?? it is look like that nrf_crypto_ecc_public_key_to_raw may done this but i am not sure.

thanks

[Einar Thorsrud]

Hi,

As you write the public key is the coordinates to a point on the curve, and this is the raw public key. Also as you suggest, you can get the raw public key (x, y coordinates) from the internal format by using nrf_crypto_ecc_public_key_to_raw(), which is the sole purpose of that function.