Please use @sheetbase/jsrsasign-server.
Using jsrsasign in Google Apps Script.
Jsrsasign homepage: https://kjur.github.io/jsrsasign/
Library ID: 1MCTN_wjd1T5SB6jr0S9HqgNnYsTmLATePrsp2-LrmhsrUlbxXOTPJ_3N
Select latest version, set Indentifier to Jsrsasign
.
Logger.log(Jsrsasign.KJUR.crypto.Util.md5('hello'));