question: public static byte [ ] hash ( byte [ ] data ) { try { MessageDigest md = MessageDigest . getInstance ( "SHA-256" ) ; md . update ( data ) ; return md . digest ( ) ; } catch ( Exception e ) { throw new RuntimeException ( "Unable to compute hash while signing request: " + e . getMessage ( ) , e ) ; } }
target:  Hashes the byte array using the SHA-256 algorithm.