nRF52840 CryptoCell Curve Support

[A Knecht]

Hi

Does the CryptoCell in the nRF52840 support secp256k1? In this documentation it says at one point Koblitz curves using fixed parameters, up to 256 bits, are supported, but then in the table below I don't see the curve listed.

Thanks

[Jørgen Holmefjord]

Hi,

Yes, this should be supported. Using nrf_crypto library you can use NRF_CRYPTO_CURVE_SECP256K1 from nrf_ecc_curve_type_t to use Koblitz 256-bit curves. If using the CC310 API directly, you should use CRYS_ECPKI_DomainID_secp256k1.

Best regards,

Jørgen