ECDSA with self defined key

RE: ECDSA with self defined key

Einar Thorsrud — Wed, 19 May 2021 09:14:18 GMT

Hi MLai,

The raw key which is used in the nrf_crypto APIs is raw hex, not base 64 format. (There are no nrf_crypto API's that wark on base 64.)

RE: ECDSA with self defined key

MLai — Tue, 18 May 2021 18:38:07 GMT

Hi Einar,

I am now testing on the key generated from both openssl and nrfutil, but I am facing the problem in this thread. And I am a little bit confuse that the hash generated is in what format, is it (r|s) or in other format, as I see normally the hash are in base 64 format which should more than 64 bytes. Thanks a lot.

Best regards,

MLai

RE: ECDSA with self defined key

Einar Thorsrud — Tue, 18 May 2021 12:40:07 GMT

Hi MLai,

The nrf_crypto library can only import and export raw keys, and not certificates (like .pem files). So you can use the private key you have allready generated, but you need to export it to raw using some tool of your choice, and then import it to nrf_crypto using nrf_crypto_ecc_private_key_from_raw().