github.com/supr/packer@v0.3.10-0.20131015195147-7b09e24ac3c1/builder/digitalocean/step_create_ssh_key.go (about)

     1  package digitalocean
     2  
     3  import (
     4  	"cgl.tideland.biz/identifier"
     5  	"code.google.com/p/go.crypto/ssh"
     6  	"crypto/rand"
     7  	"crypto/rsa"
     8  	"crypto/x509"
     9  	"encoding/hex"
    10  	"encoding/pem"
    11  	"fmt"
    12  	"github.com/mitchellh/multistep"
    13  	"github.com/mitchellh/packer/packer"
    14  	"log"
    15  )
    16  
    17  type stepCreateSSHKey struct {
    18  	keyId uint
    19  }
    20  
    21  func (s *stepCreateSSHKey) Run(state multistep.StateBag) multistep.StepAction {
    22  	client := state.Get("client").(*DigitalOceanClient)
    23  	ui := state.Get("ui").(packer.Ui)
    24  
    25  	ui.Say("Creating temporary ssh key for droplet...")
    26  
    27  	priv, err := rsa.GenerateKey(rand.Reader, 2014)
    28  
    29  	// ASN.1 DER encoded form
    30  	priv_der := x509.MarshalPKCS1PrivateKey(priv)
    31  	priv_blk := pem.Block{
    32  		Type:    "RSA PRIVATE KEY",
    33  		Headers: nil,
    34  		Bytes:   priv_der,
    35  	}
    36  
    37  	// Set the private key in the statebag for later
    38  	state.Put("privateKey", string(pem.EncodeToMemory(&priv_blk)))
    39  
    40  	// Marshal the public key into SSH compatible format
    41  	// TODO properly handle the public key error
    42  	pub, _ := ssh.NewPublicKey(&priv.PublicKey)
    43  	pub_sshformat := string(ssh.MarshalAuthorizedKey(pub))
    44  
    45  	// The name of the public key on DO
    46  	name := fmt.Sprintf("packer-%s", hex.EncodeToString(identifier.NewUUID().Raw()))
    47  
    48  	// Create the key!
    49  	keyId, err := client.CreateKey(name, pub_sshformat)
    50  	if err != nil {
    51  		err := fmt.Errorf("Error creating temporary SSH key: %s", err)
    52  		state.Put("error", err)
    53  		ui.Error(err.Error())
    54  		return multistep.ActionHalt
    55  	}
    56  
    57  	// We use this to check cleanup
    58  	s.keyId = keyId
    59  
    60  	log.Printf("temporary ssh key name: %s", name)
    61  
    62  	// Remember some state for the future
    63  	state.Put("ssh_key_id", keyId)
    64  
    65  	return multistep.ActionContinue
    66  }
    67  
    68  func (s *stepCreateSSHKey) Cleanup(state multistep.StateBag) {
    69  	// If no key name is set, then we never created it, so just return
    70  	if s.keyId == 0 {
    71  		return
    72  	}
    73  
    74  	client := state.Get("client").(*DigitalOceanClient)
    75  	ui := state.Get("ui").(packer.Ui)
    76  	c := state.Get("config").(config)
    77  
    78  	ui.Say("Deleting temporary ssh key...")
    79  	err := client.DestroyKey(s.keyId)
    80  
    81  	curlstr := fmt.Sprintf("curl '%v/ssh_keys/%v/destroy?client_id=%v&api_key=%v'",
    82  		DIGITALOCEAN_API_URL, s.keyId, c.ClientID, c.APIKey)
    83  
    84  	if err != nil {
    85  		log.Printf("Error cleaning up ssh key: %v", err.Error())
    86  		ui.Error(fmt.Sprintf(
    87  			"Error cleaning up ssh key. Please delete the key manually: %v", curlstr))
    88  	}
    89  }