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rubyprng

Seedable CSPRNG in Ruby

Does Ruby provide functionality to run a seedable CSPRNG? From the standard library, OpenSSL/SecureRandom is cryptographically secure, but not seedable. Random is seedable, but not cryptographically secure.

Alternatively, what is a secure way to instantiate a cryptographically secure PRNG in Ruby using only OpenSSL APIs?

Solution

  • I ended up implementing DRBG_HMAC in Ruby. The code can be found here: https://github.com/cryodex/drbg-rb