ocrypto_aes_ccm_init()

void ocrypto_aes_ccm_init	(	ocrypto_aes_ccm_ctx *	ctx,
		const uint8_t *	key,
		size_t	size,
		const uint8_t *	nonce,
		size_t	n_len,
		size_t	tag_len,
		size_t	pt_len,
		size_t	aa_len
	)

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

AES-CCM initialization.

The context ctx is initialized using the given key key and nonce nonce.

Parameters

[out]	ctx	Context.
	key	AES key. May be NULL.
	size	Key size (16, 24, or 32 bytes).
	nonce	Nonce. May be NULL.
	n_len	Nonce length, 7 <= n_len <= 13.
	tag_len	Tag length (4, 6, 8, 10, 12, 14, or 16).
	pt_len	Plaintext length, 0 <= pt_len < 2^(8*(15-n_len)).
	aa_len	Additional authentication data length.

Remarks

If key is NULL only nonce and lengths are set. If nonce is NULL only key is set. Both key and nonce must be set before update is called.