ocrypto_ecdsa_p256k1_sign_hash()

int ocrypto_ecdsa_p256k1_sign_hash	(	uint8_t	sig[64],
		const uint8_t	hash[32],
		const uint8_t	sk[32],
		const uint8_t	ek[32] )

#include <crypto/nrf_oberon/include/ocrypto_ecdsa_p256k1.h>

ECDSA secp256k1 signature generation from SHA256 hash.

The message hash hash is signed using the secret key sk and the ephemeral session key ek. The signature is put into sig.

Parameters

[out]	sig	Generated signature.
	hash	Input hash.
	sk	Secret key.
	ek	Session key.

Return values

0	If ek is a valid session key.
-1	Otherwise.