aesCtrParams.counter


计数器块的初始值。长度必须正好为16字节。

【The initial value of the counter block. This must be exactly 16 bytes long.】

AES-CTR 方法使用块的最右边 length 位作为计数器,剩余的位作为随机数。

【The AES-CTR method uses the rightmost length bits of the block as the counter and the remaining bits as the nonce.】