question: public static boolean checkpw ( byte [ ] plaintext0 , final String hashed ) { byte hashed_bytes [ ] ; byte try_bytes [ ] ; try { final String try_pw = hashpw ( plaintext0 , hashed ) ; hashed_bytes = hashed . getBytes ( "UTF-8" ) ; try_bytes = try_pw . getBytes ( "UTF-8" ) ; } catch ( final UnsupportedEncodingException uee ) { return false ; } finally { if ( plaintext0 != null ) { Arrays . fill ( plaintext0 , ( byte ) '\0' ) ; plaintext0 = null ; } } if ( hashed_bytes . length != try_bytes . length ) { return false ; } byte ret = 0 ; for ( int i = 0 ; i < try_bytes . length ; i ++ ) { ret |= hashed_bytes [ i ] ^ try_bytes [ i ] ; } return ret == 0 ; }
target:  Check that a plaintext password matches a previously hashed one