ocrypto_aes_gcm_decrypt()

int ocrypto_aes_gcm_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	iv[12],
		const uint8_t *	aa,
		size_t	aa_len
	)

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

AES-GCM decryption.

Parameters

[out]	pt	Plaintext.
	tag	Authentication tag.
	tag_len	Authentication tag length, 0 < tag_len <= 16.
	ct	Ciphertext.
	ct_len	Ciphertext length, 0 < ct_len < 2^36-32 bytes.
	key	AES key.
	size	Key size (16, 24, or 32 bytes).
	iv	Initial vector.
	aa	Additional authentication data.
	aa_len	Additional authentication data length, 0 < aa_len < 2^61 bytes.

Remarks

ct may be same as pt.

Return values

0	If tag is valid.
-1	Otherwise.