CODEWITHSUNDEEP
c++openssltls-psk
wasp256
wasp256

Reputation: 6242

How to use pre-shared keys in OpenSSL

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? I'm not talking about Public Keys like RSA, but 2 pre-shared keys that get handed over to the two parties!

I'd have to implement that in C++, so if possible I'd need a working solution for that.

Upvotes: 0

Views: 5145

Answers (1)

viraptor
viraptor

Reputation: 34145

Yes, it's possible. What you seem to be looking for is the symmetric-key encryption.

In that case, the key is usually just a required number of random bytes. Any cryptographically secure RNG source is ok for that. If you're going to use openssl afterwards, RAND_bytes() will work.

Also see AES Encryption -Key Generation with OpenSSL

Upvotes: 3

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