Add support for NTLM the WinRM communicator.

WinRM exposes an HTTP transport decorator that can be used for different
authentication schemes.  Windows on Azures requires this if one is to use
the out of the box configuration.

Godeps/Godeps.json

@@ -329,7 +329,7 @@
 		},
 		{
 			"ImportPath": "github.com/packer-community/winrmcp/winrmcp",
-			"Rev": "3d184cea22ee1c41ec1697e0d830ff0c78f7ea97"
+			"Rev": "f1bcf36a69fa2945e65dd099eee11b560fbd3346"
 		},
 		{
 			"ImportPath": "github.com/pierrec/lz4",

communicator/winrm/communicator.go

@@ -41,6 +41,11 @@ func New(config *Config) (*Communicator, error) {
 
 	// Create the client
 	params := winrm.DefaultParameters()
+
+	if config.TransportDecorator != nil {
+		params.TransportDecorator = config.TransportDecorator
+	}
+
 	params.Timeout = formatDuration(config.Timeout)
 	client, err := winrm.NewClientWithParameters(
 		endpoint, config.Username, config.Password, params)
@@ -155,5 +160,6 @@ func (c *Communicator) newCopyClient() (*winrmcp.Winrmcp, error) {
 		Insecure:              c.config.Insecure,
 		OperationTimeout:      c.config.Timeout,
 		MaxOperationsPerShell: 15, // lowest common denominator
+		TransportDecorator:    c.config.TransportDecorator,
 	})
 }

communicator/winrm/config.go

@@ -1,16 +1,18 @@
 package winrm
 
 import (
+	"net/http"
 	"time"
 )
 
 // Config is used to configure the WinRM connection
 type Config struct {
-	Host     string
-	Port     int
-	Username string
-	Password string
-	Timeout  time.Duration
-	Https    bool
-	Insecure bool
+	Host               string
+	Port               int
+	Username           string
+	Password           string
+	Timeout            time.Duration
+	Https              bool
+	Insecure           bool
+	TransportDecorator func(*http.Transport) http.RoundTripper
 }

helper/communicator/config.go

@@ -3,6 +3,7 @@ package communicator
 import (
 	"errors"
 	"fmt"
+	"net/http"
 	"os"
 	"time"
 
@@ -32,13 +33,14 @@ type Config struct {
 	SSHFileTransferMethod string        `mapstructure:"ssh_file_transfer_method"`
 
 	// WinRM
-	WinRMUser     string        `mapstructure:"winrm_username"`
-	WinRMPassword string        `mapstructure:"winrm_password"`
-	WinRMHost     string        `mapstructure:"winrm_host"`
-	WinRMPort     int           `mapstructure:"winrm_port"`
-	WinRMTimeout  time.Duration `mapstructure:"winrm_timeout"`
-	WinRMUseSSL   bool          `mapstructure:"winrm_use_ssl"`
-	WinRMInsecure bool          `mapstructure:"winrm_insecure"`
+	WinRMUser               string        `mapstructure:"winrm_username"`
+	WinRMPassword           string        `mapstructure:"winrm_password"`
+	WinRMHost               string        `mapstructure:"winrm_host"`
+	WinRMPort               int           `mapstructure:"winrm_port"`
+	WinRMTimeout            time.Duration `mapstructure:"winrm_timeout"`
+	WinRMUseSSL             bool          `mapstructure:"winrm_use_ssl"`
+	WinRMInsecure           bool          `mapstructure:"winrm_insecure"`
+	WinRMTransportDecorator func(*http.Transport) http.RoundTripper
 }
 
 // Port returns the port that will be used for access based on config.

helper/communicator/step_connect_winrm.go

@@ -124,13 +124,14 @@ func (s *StepConnectWinRM) waitForWinRM(state multistep.StateBag, cancel <-chan
 
 		log.Println("[INFO] Attempting WinRM connection...")
 		comm, err = winrm.New(&winrm.Config{
-			Host:     host,
-			Port:     port,
-			Username: user,
-			Password: password,
-			Timeout:  s.Config.WinRMTimeout,
-			Https:    s.Config.WinRMUseSSL,
-			Insecure: s.Config.WinRMInsecure,
+			Host:               host,
+			Port:               port,
+			Username:           user,
+			Password:           password,
+			Timeout:            s.Config.WinRMTimeout,
+			Https:              s.Config.WinRMUseSSL,
+			Insecure:           s.Config.WinRMInsecure,
+			TransportDecorator: s.Config.WinRMTransportDecorator,
 		})
 		if err != nil {
 			log.Printf("[ERROR] WinRM connection err: %s", err)