我试图从 AES 实现代码中理解这条评论:
/**
* This program generates a AES key, retrieves its raw bytes, and
* then reinstantiates a AES key from the key bytes.
* The reinstantiated key is used to initialize a AES cipher for
* encryption and decryption.
*/
我不明白以下几点:
- AES 密钥的原始字节是什么意思?
- 从密钥字节重新实例化 AES 密钥是什么意思?