module Random::Secure

Overview

Random::Secure generates random numbers from a secure source provided by the system.

It uses acryptographically secure pseudorandom number generator (CSPRNG) for cryptography and secure usages such as generating secret keys, or to seed another pseudorandom number generator (PRNG).

Random::Secure.rand(6)            # => 4
[1, 5, 6].shuffle(Random::Secure) # => [6, 1, 5]

On BSD-based systems and macOS/Darwin, it usesarc4random, on Linuxgetrandom, on WindowsRtlGenRandom, and falls back to reading from/dev/urandom on UNIX systems.

Extended Modules

• Random
• Random::Secure

Defined in:

random/secure.cr

Instance Method Summary

• #next_u
• #random_bytes(buf : Bytes) : Nil

Instance Method Detail