github.com/amanya/packer@v0.12.1-0.20161117214323-902ac5ab2eb6/builder/profitbricks/step_create_ssh_key.go (about)

     1  package profitbricks
     2  
     3  import (
     4  	"crypto/rand"
     5  	"crypto/rsa"
     6  	"crypto/x509"
     7  	"encoding/pem"
     8  	"fmt"
     9  	"os"
    10  
    11  	"github.com/mitchellh/multistep"
    12  	"github.com/mitchellh/packer/packer"
    13  	"golang.org/x/crypto/ssh"
    14  	"io/ioutil"
    15  )
    16  
    17  type StepCreateSSHKey struct {
    18  	Debug        bool
    19  	DebugKeyPath string
    20  }
    21  
    22  func (s *StepCreateSSHKey) Run(state multistep.StateBag) multistep.StepAction {
    23  	ui := state.Get("ui").(packer.Ui)
    24  	c := state.Get("config").(*Config)
    25  
    26  	if c.SSHKey_path == "" {
    27  		ui.Say("Creating temporary SSH key for instance...")
    28  		priv, err := rsa.GenerateKey(rand.Reader, 2048)
    29  		if err != nil {
    30  			err := fmt.Errorf("Error creating temporary ssh key: %s", err)
    31  			state.Put("error", err)
    32  			ui.Error(err.Error())
    33  			return multistep.ActionHalt
    34  		}
    35  
    36  		priv_blk := pem.Block{
    37  			Type:    "RSA PRIVATE KEY",
    38  			Headers: nil,
    39  			Bytes:   x509.MarshalPKCS1PrivateKey(priv),
    40  		}
    41  
    42  		pub, err := ssh.NewPublicKey(&priv.PublicKey)
    43  		if err != nil {
    44  			err := fmt.Errorf("Error creating temporary ssh key: %s", err)
    45  			state.Put("error", err)
    46  			ui.Error(err.Error())
    47  			return multistep.ActionHalt
    48  		}
    49  		state.Put("privateKey", string(pem.EncodeToMemory(&priv_blk)))
    50  		state.Put("publicKey", string(ssh.MarshalAuthorizedKey(pub)))
    51  
    52  		ui.Message(fmt.Sprintf("Saving key to: %s", s.DebugKeyPath))
    53  		f, err := os.Create(s.DebugKeyPath)
    54  		if err != nil {
    55  			state.Put("error", fmt.Errorf("Error saving debug key: %s", err))
    56  			return multistep.ActionHalt
    57  		}
    58  
    59  		f.Chmod(os.FileMode(int(0700)))
    60  		err = pem.Encode(f, &priv_blk)
    61  		f.Close()
    62  		if err != nil {
    63  			state.Put("error", fmt.Errorf("Error saving debug key: %s", err))
    64  			return multistep.ActionHalt
    65  		}
    66  	} else {
    67  		ui.Say(c.SSHKey_path)
    68  		pemBytes, err := ioutil.ReadFile(c.SSHKey_path)
    69  
    70  		if err != nil {
    71  			ui.Error(err.Error())
    72  			return multistep.ActionHalt
    73  		}
    74  
    75  		block, _ := pem.Decode(pemBytes)
    76  
    77  		priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
    78  
    79  		if err != nil {
    80  			err := fmt.Errorf("Error creating temporary ssh key: %s", err)
    81  			state.Put("error", err)
    82  			ui.Error(err.Error())
    83  			return multistep.ActionHalt
    84  		}
    85  
    86  		priv_blk := pem.Block{
    87  			Type:    "RSA PRIVATE KEY",
    88  			Headers: nil,
    89  			Bytes:   x509.MarshalPKCS1PrivateKey(priv),
    90  		}
    91  
    92  		pub, err := ssh.NewPublicKey(&priv.PublicKey)
    93  		if err != nil {
    94  			err := fmt.Errorf("Error creating temporary ssh key: %s", err)
    95  			state.Put("error", err)
    96  			ui.Error(err.Error())
    97  			return multistep.ActionHalt
    98  		}
    99  		state.Put("privateKey", string(pem.EncodeToMemory(&priv_blk)))
   100  		state.Put("publicKey", string(ssh.MarshalAuthorizedKey(pub)))
   101  	}
   102  	return multistep.ActionContinue
   103  }
   104  
   105  func (s *StepCreateSSHKey) Cleanup(state multistep.StateBag) {}