108 lines
3.0 KiB
Go
108 lines
3.0 KiB
Go
package common
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import (
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"context"
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"fmt"
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"os"
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"github.com/hashicorp/packer/helper/communicator"
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"github.com/hashicorp/packer/helper/communicator/ssh"
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"github.com/hashicorp/packer/packer"
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"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
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"github.com/hashicorp/packer/packer-plugin-sdk/uuid"
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)
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// StepSshKeyPair executes the business logic for setting the SSH key pair in
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// the specified communicator.Config.
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type StepSshKeyPair struct {
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Debug bool
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DebugKeyPath string
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Comm *communicator.Config
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}
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func (s *StepSshKeyPair) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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if s.Comm.SSHPassword != "" {
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return multistep.ActionContinue
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}
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ui := state.Get("ui").(packer.Ui)
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if s.Comm.SSHPrivateKeyFile != "" {
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ui.Say("Using existing SSH private key for the communicator...")
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privateKeyBytes, err := s.Comm.ReadSSHPrivateKeyFile()
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if err != nil {
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state.Put("error", err)
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return multistep.ActionHalt
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}
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kp, err := ssh.KeyPairFromPrivateKey(ssh.FromPrivateKeyConfig{
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RawPrivateKeyPemBlock: privateKeyBytes,
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Comment: fmt.Sprintf("packer_%s", uuid.TimeOrderedUUID()),
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})
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if err != nil {
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state.Put("error", err)
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return multistep.ActionHalt
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}
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s.Comm.SSHPrivateKey = privateKeyBytes
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s.Comm.SSHKeyPairName = kp.Comment
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s.Comm.SSHTemporaryKeyPairName = kp.Comment
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s.Comm.SSHPublicKey = kp.PublicKeyAuthorizedKeysLine
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return multistep.ActionContinue
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}
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if s.Comm.SSHAgentAuth {
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ui.Say("Using local SSH Agent to authenticate connections for the communicator...")
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return multistep.ActionContinue
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}
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ui.Say("Creating ephemeral key pair for SSH communicator...")
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kp, err := ssh.NewKeyPair(ssh.CreateKeyPairConfig{
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Comment: fmt.Sprintf("packer_%s", uuid.TimeOrderedUUID()),
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})
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if err != nil {
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state.Put("error", fmt.Errorf("Error creating temporary keypair: %s", err))
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return multistep.ActionHalt
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}
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s.Comm.SSHKeyPairName = kp.Comment
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s.Comm.SSHTemporaryKeyPairName = kp.Comment
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s.Comm.SSHPrivateKey = kp.PrivateKeyPemBlock
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s.Comm.SSHPublicKey = kp.PublicKeyAuthorizedKeysLine
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s.Comm.SSHClearAuthorizedKeys = true
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ui.Say("Created ephemeral SSH key pair for communicator")
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// If we're in debug mode, output the private key to the working
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// directory.
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if s.Debug {
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ui.Message(fmt.Sprintf("Saving communicator private key for debug purposes: %s", s.DebugKeyPath))
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f, err := os.OpenFile(s.DebugKeyPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
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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(kp.PrivateKeyPemBlock); 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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}
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return multistep.ActionContinue
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}
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func (s *StepSshKeyPair) Cleanup(state multistep.StateBag) {
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if s.Debug {
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if err := os.Remove(s.DebugKeyPath); err != nil {
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ui := state.Get("ui").(packer.Ui)
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ui.Error(fmt.Sprintf(
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"Error removing debug key '%s': %s", s.DebugKeyPath, err))
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}
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}
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}
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