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

 
MODULE SHA256;
IMPORT
  Crypto:SHA256,
  Crypto:Utils,
  Strings,
  Out;
VAR
  h: SHA256.Hash;
  str: ARRAY 128 OF CHAR;
 
BEGIN
  h := SHA256.NewHash();
  h.Initialize;
  str := "Rosetta code";
  h.Update(str,0,Strings.Length(str));
  h.GetHash(str,0);
  Out.String("SHA256: ");Utils.PrintHex(str,0,h.size);Out.Ln
END SHA256.
 