106 lines
2.6 KiB
Go
106 lines
2.6 KiB
Go
package scaleway
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"runtime"
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"strings"
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"github.com/hashicorp/packer/packer"
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"github.com/mitchellh/multistep"
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"golang.org/x/crypto/ssh"
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)
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type stepCreateSSHKey struct {
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Debug bool
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DebugKeyPath string
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PrivateKeyFile string
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}
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func (s *stepCreateSSHKey) Run(state multistep.StateBag) multistep.StepAction {
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ui := state.Get("ui").(packer.Ui)
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if s.PrivateKeyFile != "" {
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ui.Say("Using existing SSH private key")
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privateKeyBytes, err := ioutil.ReadFile(s.PrivateKeyFile)
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if err != nil {
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state.Put("error", fmt.Errorf(
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"Error loading configured private key file: %s", err))
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return multistep.ActionHalt
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}
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state.Put("privateKey", string(privateKeyBytes))
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state.Put("ssh_pubkey", "")
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return multistep.ActionContinue
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}
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ui.Say("Creating temporary ssh key for server...")
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priv, err := rsa.GenerateKey(rand.Reader, 2014)
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if err != nil {
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err := fmt.Errorf("Error creating temporary SSH key: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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// ASN.1 DER encoded form
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priv_der := x509.MarshalPKCS1PrivateKey(priv)
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priv_blk := pem.Block{
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Type: "RSA PRIVATE KEY",
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Headers: nil,
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Bytes: priv_der,
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}
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// Set the private key in the statebag for later
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state.Put("privateKey", string(pem.EncodeToMemory(&priv_blk)))
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pub, _ := ssh.NewPublicKey(&priv.PublicKey)
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pub_sshformat := string(ssh.MarshalAuthorizedKey(pub))
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pub_sshformat = strings.Replace(pub_sshformat, " ", "_", -1)
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log.Printf("temporary ssh key created")
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// Remember some state for the future
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state.Put("ssh_pubkey", string(pub_sshformat))
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// If we're in debug mode, output the private key to the working directory.
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if s.Debug {
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ui.Message(fmt.Sprintf("Saving key for debug purposes: %s", s.DebugKeyPath))
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f, err := os.Create(s.DebugKeyPath)
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if err != nil {
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state.Put("error", fmt.Errorf("Error saving debug key: %s", err))
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return multistep.ActionHalt
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}
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defer f.Close()
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// Write the key out
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if _, err := f.Write(pem.EncodeToMemory(&priv_blk)); err != nil {
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state.Put("error", fmt.Errorf("Error saving debug key: %s", err))
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return multistep.ActionHalt
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}
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// Chmod it so that it is SSH ready
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if runtime.GOOS != "windows" {
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if err := f.Chmod(0600); err != nil {
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state.Put("error", fmt.Errorf("Error setting permissions of debug key: %s", err))
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return multistep.ActionHalt
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}
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}
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}
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return multistep.ActionContinue
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}
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func (s *stepCreateSSHKey) Cleanup(state multistep.StateBag) {
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// SSH key is passed via tag. Nothing to do here.
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return
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}
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