example_test.go

Documentation: crypto/sha256

		 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
View as plain text