Function AES_GMAC_Final

freebsd/opencrypto/gmac.c:115–131

}

void
AES_GMAC_Final(uint8_t *digest, void *ctx)
{
	struct aes_gmac_ctx *agc;
	uint8_t enccntr[GMAC_BLOCK_LEN];
	struct gf128 a;

	/* XXX - zero additional bytes? */
	agc = ctx;
	agc->counter[GMAC_BLOCK_LEN - 1] = 1;

	rijndaelEncrypt(agc->keysched, agc->rounds, agc->counter, enccntr);
	a = gf128_add(agc->hash, gf128_read(enccntr));
	gf128_write(a, digest);

	explicit_bzero(enccntr, sizeof enccntr);
}