如何使用Bouncy Castle生成对称密钥? [英] How to generate a symmetric key with Bouncy Castle?

问题描述

如何使用Bouncy Castle生成对称密钥? PrivateKeyFactory 和 PublicKeyFactory 似乎与

How can I generate a symmetric key with Bouncy Castle? Both PrivateKeyFactory and PublicKeyFactory seem related to AsymmetricKeyParameter.

我不想知道任何JCA/JCE API，相反，我只对Bouncy Castle特定的API感兴趣.

I don't want to know any JCA/JCE API - instead I'm only interested in Bouncy Castle specific API.

(可以)我可以生成一个随机字节吗?

Can (should) I just generate a random bytes?

推荐答案

AES没有任何弱密钥，因此直接生成随机数应该没问题.

AES does not have any weak keys, so a straightforward random generation should be fine.

// SecureRandom is expensive to initialize (takes several milliseconds) –
// consider keeping the instance around if you are generating many keys.
SecureRandom random = new SecureRandom();
byte[] keyBytes = new byte[16];
random.nextBytes(keyBytes);
SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");

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