ocrypto_hmac_sha256()

void ocrypto_hmac_sha256	(	uint8_t	r[(32)],
		const uint8_t *	key,
		size_t	key_len,
		const uint8_t *	in,
		size_t	in_len )

#include <crypto/nrf_oberon/include/ocrypto_hmac_sha256.h>

HMAC-SHA256 algorithm.

The input message in is authenticated using the key key. The computed authenticator is put into r. To verify the authenticator, the recipient needs to recompute the HMAC authenticator and can then compare it with the received authenticator.

Parameters

[out]	r	HMAC output.
	key	HMAC key.
	key_len	Length of key.
	in	Input data.
	in_len	Length of in.