class SHA3::Digest::SHAKE_256

SHAKE_256 is an extendable-output function (XOF) that can produce hash values of any desired length.

Usage:

digest = SHA3::Digest::SHAKE_256.new
digest.update("message")
hash = digest.hexdigest(32)  # Get 32 bytes (64 hex chars) of output

# Or more simply:
hash = SHA3::Digest::SHAKE_256.hexdigest("message", 32)

See SHA3::Digest for complete API list and additional documentation.