如何在OpenSSL中使用预共享密钥
[英]How to use pre-shared keys in OpenSSL
问题描述
Is it possible to generate 2 pre-shared keys on on system, distribute them to two host A and B, so that A and B can then use those keys for the encrypted connection between them? 
是否可以在系统上生成2个预共享密钥，然后将它们分配给两个主机A和B，以便A和B然后可以将这些密钥用于它们之间的加密连接？ I'm not talking about Public Keys like RSA, but 2 pre-shared keys that get handed over to the two parties! 我不是在谈论像RSA这样的公钥，而是2个预共享的密钥，它们已经移交给了两方！
I'd have to implement that in C++, so if possible I'd need a working solution for that. 我必须在C ++中实现它，所以如果可能的话，我需要一个可行的解决方案。
1 个解决方案
解决方案1
1 已采纳 2017-01-14 10:13:07
Yes, it's possible. 是的，有可能。 What you seem to be looking for is the symmetric-key encryption. 您似乎正在寻找的是对称密钥加密。
In that case, the key is usually just a required number of random bytes. 在这种情况下，密钥通常只是所需数量的随机字节。 Any cryptographically secure RNG source is ok for that. 为此，任何加密安全的RNG源都是可以的。 If you're going to use openssl afterwards, RAND_bytes() will work. 如果以后要使用openssl，则RAND_bytes()将起作用。
Also see AES Encryption -Key Generation with OpenSSL 另请参阅AES加密-使用OpenSSL生成密钥
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