ocrypto_aes_gcm_final_dec()

int ocrypto_aes_gcm_final_dec	(	ocrypto_aes_gcm_ctx *	ctx,
		const uint8_t *	tag,
		size_t	tag_len
	)

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

AES-GCM final decoder step.

The generator state ctx is used to finalize the decryption and check the tag.

Parameters

ctx	Generator state.
tag	Received authentication tag.
tag_len	Authentication tag length.

Return values

0	If tag is valid.
-1	Otherwise.