gistfile1.go

// standard interface
h := blake256.New() // or sha256.New(), or anything else
h.Write([]byte("hello"))
result := h.Sum(nil) // output 256-byte hash

// standard interface too
h := skein.NewHash(32)
h.Write([]byte("hello"))
result := h.Sum(nil) // output 256-byte hash
// but also any hash length via OutputReader
reader := h.OutputReader()
io.Copy(os.Stdout, reader) // output "infinite"-length hash to stdout until killed