aesgcm_expandkey
if (aesgcm_expandkey(ctx, key, keylen, AUTHTAG_LEN)) {
int aesgcm_expandkey(struct aesgcm_ctx *ctx, const u8 *key,
EXPORT_SYMBOL(aesgcm_expandkey);
if (aesgcm_expandkey(&ctx, aesgcm_tv[i].key, aesgcm_tv[i].klen,