SHA-256 is the recommended stronger alternative to SHA-1. See FIPS PUB 180-4 for implementation details.

Either by using a dedicated library or implementing the algorithm in your language, show that the SHA-256 digest of the string "Rosetta code" is: 764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf

 
class ShaHash {
   function : Main(args : String[]) ~ Nil {
      hash:= Encryption.Hash->SHA256("Rosetta code"->ToByteArray());
      str := hash->ToHexString()->ToLower();
      str->PrintLine();
      str->Equals("764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf")->PrintLine();
   }
}
 