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

// The following will return a list of all the cipher 
// algorithms supported by the installation of Lasso
cipher_list
 
// With a -digest parameter the method will limit the returned list
// to all of the digest algorithms supported by the installation of Lasso
cipher_list(-digest)
 
// return the SHA-256 digest. Dependant on SHA-256 being an available digest method
cipher_digest('Rosetta Code', -digest='SHA-256',-hex=true)
 