All files functions are available under Crypto package. They can be used by importing the package in the script or using package name before the function name. Package name together with function name used in documentation.
Example with import:
Example
import Crypto;
println(MD5("Some text")); //Will print "9DB5682A4D778CA2CB79580BDB67083F"
Example without import:
Example
println(Crypto::MD5("Some text")); //Will print "9DB5682A4D778CA2CB79580BDB67083F"