ocrypto_aes_ccm_decrypt()

int ocrypto_aes_ccm_decrypt	(	uint8_t *	pt,
		const uint8_t *	tag,
		size_t	tag_len,
		const uint8_t *	ct,
		size_t	ct_len,
		const uint8_t *	key,
		size_t	size,
		const uint8_t *	nonce,
		size_t	n_len,
		const uint8_t *	aa,
		size_t	aa_len
	)

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

AES-CCM decryption.

Parameters

[out]	pt	Plaintext.
	tag	Authentication tag.
	tag_len	Tag length (4, 6, 8, 10, 12, 14, or 16).
	ct	Ciphertext.
	ct_len	Ciphertext length, 0 <= ct_len < 2^(8*(15-n_len)).
	key	AES key.
	size	Key size (16, 24, or 32).
	nonce	Nonce.
	n_len	Nonce length, 7 <= n_len <= 13.
	aa	Additional authentication data.
	aa_len	Additional authentication data length.

Return values

0	If tag is valid.
-1	Otherwise.

Remarks

ct may be same as pt.