// Copyright 2016 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package sha256_test import ( "crypto/sha256" "fmt" "io" "log" "os" ) func ExampleSum256() { sum := sha256.Sum256([]byte("hello world\n")) fmt.Printf("%x", sum) // Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447 } func ExampleNew() { h := sha256.New() h.Write([]byte("hello world\n")) fmt.Printf("%x", h.Sum(nil)) // Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447 } func ExampleNew_file() { f, err := os.Open("file.txt") if err != nil { log.Fatal(err) } defer f.Close() h := sha256.New() if _, err := io.Copy(h, f); err != nil { log.Fatal(err) } fmt.Printf("%x", h.Sum(nil)) }