Add support for SSH Key Authentication with ESX builder

builder/vmware/iso/builder.go

@@ -57,6 +57,7 @@ type Config struct {
 	RemotePort           uint   `mapstructure:"remote_port"`
 	RemoteUser           string `mapstructure:"remote_username"`
 	RemotePassword       string `mapstructure:"remote_password"`
+	RemotePrivateKey     string `mapstructure:"remote_private_key_file"`
 
 	ctx interpolate.Context
 }

builder/vmware/iso/driver.go

@@ -21,6 +21,7 @@ func NewDriver(config *Config) (vmwcommon.Driver, error) {
 			Port:           config.RemotePort,
 			Username:       config.RemoteUser,
 			Password:       config.RemotePassword,
+			PrivateKey:     config.RemotePrivateKey,
 			Datastore:      config.RemoteDatastore,
 			CacheDatastore: config.RemoteCacheDatastore,
 			CacheDirectory: config.RemoteCacheDirectory,

builder/vmware/iso/driver_esx5.go

@@ -15,6 +15,7 @@ import (
 	"time"
 
 	"github.com/mitchellh/multistep"
+	commonssh "github.com/mitchellh/packer/common/ssh"
 	"github.com/mitchellh/packer/communicator/ssh"
 	"github.com/mitchellh/packer/packer"
 	gossh "golang.org/x/crypto/ssh"
@@ -27,6 +28,7 @@ type ESX5Driver struct {
 	Port           uint
 	Username       string
 	Password       string
+	PrivateKey     string
 	Datastore      string
 	CacheDatastore string
 	CacheDirectory string
@@ -340,7 +342,15 @@ func (d *ESX5Driver) connect() error {
 			ssh.PasswordKeyboardInteractive(d.Password)),
 	}
 
-	// TODO(dougm) KeyPath support
+	if d.PrivateKey != "" {
+		signer, err := commonssh.FileSigner(d.PrivateKey)
+		if err != nil {
+			return err
+		}
+
+		auth = append(auth, gossh.PublicKeys(signer))
+	}
+
 	sshConfig := &ssh.Config{
 		Connection: ssh.ConnectFunc("tcp", address),
 		SSHConfig: &gossh.ClientConfig{