1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package sha256_test 6 7 import ( 8 "crypto/sha256" 9 "fmt" 10 "io" 11 "log" 12 "os" 13 ) 14 15 func ExampleSum256() { 16 sum := sha256.Sum256([]byte("hello world\n")) 17 fmt.Printf("%x", sum) 18 // Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447 19 } 20 21 func ExampleNew() { 22 h := sha256.New() 23 h.Write([]byte("hello world\n")) 24 fmt.Printf("%x", h.Sum(nil)) 25 // Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447 26 } 27 28 func ExampleNew_file() { 29 f, err := os.Open("file.txt") 30 if err != nil { 31 log.Fatal(err) 32 } 33 defer f.Close() 34 35 h := sha256.New() 36 if _, err := io.Copy(h, f); err != nil { 37 log.Fatal(err) 38 } 39 40 fmt.Printf("%x", h.Sum(nil)) 41 } 42
