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package hyperone
import (
"context"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"os"
"runtime"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
"golang.org/x/crypto/ssh"
)
type stepCreateSSHKey struct {
Debug bool
DebugKeyPath string
}
func (s *stepCreateSSHKey) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
ui := state.Get("ui").(packersdk.Ui)
c := state.Get("config").(*Config)
ui.Say("Creating a temporary ssh key for the VM...")
priv, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
state.Put("error", fmt.Errorf("error generating ssh key: %s", err))
return multistep.ActionHalt
}
privDER := x509.MarshalPKCS1PrivateKey(priv)
privBLK := pem.Block{
Type: "RSA PRIVATE KEY",
Headers: nil,
Bytes: privDER,
}
c.Comm.SSHPrivateKey = pem.EncodeToMemory(&privBLK)
pub, err := ssh.NewPublicKey(&priv.PublicKey)
if err != nil {
state.Put("error", fmt.Errorf("error getting public key: %s", err))
return multistep.ActionHalt
}
pubSSHFormat := string(ssh.MarshalAuthorizedKey(pub))
// Remember public SSH key for future connections
state.Put("ssh_public_key", pubSSHFormat)
// If we're in debug mode, output the private key to the working directory.
if s.Debug {
ui.Message(fmt.Sprintf("Saving key for debug purposes: %s", s.DebugKeyPath))
f, err := os.Create(s.DebugKeyPath)
if err != nil {
state.Put("error", fmt.Errorf("error saving debug key: %s", err))
return multistep.ActionHalt
}
defer f.Close()
// Write the key out
if _, err := f.Write(pem.EncodeToMemory(&privBLK)); err != nil {
state.Put("error", fmt.Errorf("error saving debug key: %s", err))
return multistep.ActionHalt
}
// Chmod it so that it is SSH ready
if runtime.GOOS != "windows" {
if err := f.Chmod(0600); err != nil {
state.Put("error", fmt.Errorf("error setting permissions of debug key: %s", err))
return multistep.ActionHalt
}
}
}
return multistep.ActionContinue
}
func (s *stepCreateSSHKey) Cleanup(state multistep.StateBag) {}
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