* [Security] Use a CSPRNG for salts, tokens, and RNG seeding
Password salts and activation tokens were generated with the global SFMT
RNG, which was seeded from a 32-bit timestamp, making registration
salts and activation tokens predictable. The game RNG used the same
timestamp seed across restarts.
Add CryptoUtil backed by OpenSSL RAND_bytes and use it for salt/token
generation and to seed RNG_SFMT with a 64-bit CSPRNG value in both the
client and server. Link libcockatrice_utility against OpenSSL::Crypto.
Took 30 seconds
Took 25 minutes
* Lint.
Took 4 minutes
Took 36 seconds
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Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
