119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
package hcloud
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import (
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"context"
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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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"log"
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"os"
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"runtime"
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"github.com/hashicorp/packer/common/uuid"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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"github.com/hetznercloud/hcloud-go/hcloud"
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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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keyId int
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}
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func (s *stepCreateSSHKey) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
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client := state.Get("hcloudClient").(*hcloud.Client)
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ui := state.Get("ui").(packer.Ui)
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c := state.Get("config").(*Config)
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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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// ASN.1 DER encoded form
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privDER := x509.MarshalPKCS1PrivateKey(priv)
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privBLK := pem.Block{
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Type: "RSA PRIVATE KEY",
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Headers: nil,
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Bytes: privDER,
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}
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// Set the private key in the config for later
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c.Comm.SSHPrivateKey = pem.EncodeToMemory(&privBLK)
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// Marshal the public key into SSH compatible format
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// TODO properly handle the public key error
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pub, _ := ssh.NewPublicKey(&priv.PublicKey)
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pubSSHFormat := string(ssh.MarshalAuthorizedKey(pub))
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// The name of the public key on the Hetzner Cloud
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name := fmt.Sprintf("packer-%s", uuid.TimeOrderedUUID())
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// Create the key!
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key, _, err := client.SSHKey.Create(context.TODO(), hcloud.SSHKeyCreateOpts{
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Name: name,
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PublicKey: pubSSHFormat,
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})
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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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// We use this to check cleanup
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s.keyId = key.ID
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log.Printf("temporary ssh key name: %s", name)
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// Remember some state for the future
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state.Put("ssh_key_id", key.ID)
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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(&privBLK)); 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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// If no key id is set, then we never created it, so just return
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if s.keyId == 0 {
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return
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}
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client := state.Get("hcloudClient").(*hcloud.Client)
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ui := state.Get("ui").(packer.Ui)
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ui.Say("Deleting temporary ssh key...")
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_, err := client.SSHKey.Delete(context.TODO(), &hcloud.SSHKey{ID: s.keyId})
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if err != nil {
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log.Printf("Error cleaning up ssh key: %s", err)
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ui.Error(fmt.Sprintf(
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"Error cleaning up ssh key. Please delete the key manually: %s", err))
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}
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}
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