Cockatrice/libcockatrice_utility/libcockatrice/utility/cryptoutil.h
Lukas Brübach a01dca4f6c
[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
2026-08-29 15:58:56 +02:00

13 lines
202 B
C++

#ifndef CRYPTOUTIL_H
#define CRYPTOUTIL_H
#include <QByteArray>
#include <QtGlobal>
namespace CryptoUtil
{
QByteArray randomBytes(int count);
quint64 randomUInt64();
} // namespace CryptoUtil
#endif