xOf
Produces a new Xof (Extendable-Output Function) for CSHAKE128
Parameters
N
A function-name bit string, used by NIST to define functions based on CSHAKE. Usage should be avoided when not required.
S
A user selected customization bit string to define a variant of the function. When no customization is desired, S is set to an empty or null value. (e.g. "My Customization".encodeToByteArray())