PKCS7Encoder类中，amount_to_pad == 0不会发生 代码如下： amount_to_pad = self.block_size - (text_length % self.block_size) if amount_to_pad == 0: amount_to_pad = self.block_size
PKCS7Encoder类中，amount_to_pad == 0不会发生
代码如下：
amount_to_pad = self.block_size - (text_length % self.block_size)
if amount_to_pad == 0:
amount_to_pad = self.block_size