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Source file src/crypto/sha256/example_test.go

Documentation: crypto/sha256

  // 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))
  }
  

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