Utilities

There are some helpful functions for performing common tasks in cryptography. These include random data generation (for example, for key material) using the operating system random source and constant-time comparisons of strings, to avoid exposing information through timing attacks.

# random strings
Crypto::Random.random_bytes(32)
#=> 32 bytes of randomness, from the OS

# constant time comparisons.
Crypto::Util.verify32(string_one, string_two)
#=> true/false.  See also verify16