libgo/go/encoding/pem/example_test.go

   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 pem_test
   6
   7 import (
   8         "crypto/x509"
   9         "encoding/pem"
  10         "fmt"
  11         "log"
  12         "os"
  13 )
  14
  15 func ExampleDecode() {
  16         var pubPEMData = []byte(`
  17 -----BEGIN PUBLIC KEY-----
  18 MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAlRuRnThUjU8/prwYxbty
  19 WPT9pURI3lbsKMiB6Fn/VHOKE13p4D8xgOCADpdRagdT6n4etr9atzDKUSvpMtR3
  20 CP5noNc97WiNCggBjVWhs7szEe8ugyqF23XwpHQ6uV1LKH50m92MbOWfCtjU9p/x
  21 qhNpQQ1AZhqNy5Gevap5k8XzRmjSldNAFZMY7Yv3Gi+nyCwGwpVtBUwhuLzgNFK/
  22 yDtw2WcWmUU7NuC8Q6MWvPebxVtCfVp/iQU6q60yyt6aGOBkhAX0LpKAEhKidixY
  23 nP9PNVBvxgu3XZ4P36gZV6+ummKdBVnc3NqwBLu5+CcdRdusmHPHd5pHf4/38Z3/
  24 6qU2a/fPvWzceVTEgZ47QjFMTCTmCwNt29cvi7zZeQzjtwQgn4ipN9NibRH/Ax/q
  25 TbIzHfrJ1xa2RteWSdFjwtxi9C20HUkjXSeI4YlzQMH0fPX6KCE7aVePTOnB69I/
  26 a9/q96DiXZajwlpq3wFctrs1oXqBp5DVrCIj8hU2wNgB7LtQ1mCtsYz//heai0K9
  27 PhE4X6hiE0YmeAZjR0uHl8M/5aW9xCoJ72+12kKpWAa0SFRWLy6FejNYCYpkupVJ
  28 yecLk/4L1W0l6jQQZnWErXZYe0PNFcmwGXy1Rep83kfBRNKRy5tvocalLlwXLdUk
  29 AIU+2GKjyT3iMuzZxxFxPFMCAwEAAQ==
  30 -----END PUBLIC KEY-----
  31 and some more`)
  32
  33         block, rest := pem.Decode(pubPEMData)
  34         if block == nil || block.Type != "PUBLIC KEY" {
  35                 log.Fatal("failed to decode PEM block containing public key")
  36         }
  37
  38         pub, err := x509.ParsePKIXPublicKey(block.Bytes)
  39         if err != nil {
  40                 log.Fatal(err)
  41         }
  42
  43         fmt.Printf("Got a %T, with remaining data: %q", pub, rest)
  44         // Output: Got a *rsa.PublicKey, with remaining data: "and some more"
  45 }
  46
  47 func ExampleEncode() {
  48         block := &pem.Block{
  49                 Type: "MESSAGE",
  50                 Headers: map[string]string{
  51                         "Animal": "Gopher",
  52                 },
  53                 Bytes: []byte("test"),
  54         }
  55
  56         if err := pem.Encode(os.Stdout, block); err != nil {
  57                 log.Fatal(err)
  58         }
  59         // Output:
  60         // -----BEGIN MESSAGE-----
  61         // Animal: Gopher
  62         //
  63         // dGVzdA==
  64         // -----END MESSAGE-----
  65 }