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config.go
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config.go
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See the LICENSE file in builder/azure for license information.
package arm
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"math/big"
"net/http"
"time"
"github.com/Azure/azure-sdk-for-go/arm/compute"
"github.com/Azure/go-autorest/autorest/to"
"github.com/Azure/go-ntlmssp"
"github.com/mitchellh/packer/builder/azure/common/constants"
"github.com/mitchellh/packer/builder/azure/pkcs12"
"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/helper/communicator"
"github.com/mitchellh/packer/helper/config"
"github.com/mitchellh/packer/packer"
"github.com/mitchellh/packer/template/interpolate"
"github.com/Azure/go-autorest/autorest/azure"
"golang.org/x/crypto/ssh"
"strings"
)
const (
DefaultCloudEnvironmentName = "Public"
DefaultImageVersion = "latest"
DefaultUserName = "packer"
DefaultVMSize = "Standard_A1"
)
type Config struct {
common.PackerConfig `mapstructure:",squash"`
// Authentication via OAUTH
ClientID string `mapstructure:"client_id"`
ClientSecret string `mapstructure:"client_secret"`
ObjectID string `mapstructure:"object_id"`
TenantID string `mapstructure:"tenant_id"`
SubscriptionID string `mapstructure:"subscription_id"`
// Capture
CaptureNamePrefix string `mapstructure:"capture_name_prefix"`
CaptureContainerName string `mapstructure:"capture_container_name"`
// Compute
ImagePublisher string `mapstructure:"image_publisher"`
ImageOffer string `mapstructure:"image_offer"`
ImageSku string `mapstructure:"image_sku"`
ImageVersion string `mapstructure:"image_version"`
Location string `mapstructure:"location"`
VMSize string `mapstructure:"vm_size"`
// Deployment
ResourceGroupName string `mapstructure:"resource_group_name"`
StorageAccount string `mapstructure:"storage_account"`
storageAccountBlobEndpoint string
CloudEnvironmentName string `mapstructure:"cloud_environment_name"`
cloudEnvironment *azure.Environment
// OS
OSType string `mapstructure:"os_type"`
// Runtime Values
UserName string
Password string
tmpAdminPassword string
tmpCertificatePassword string
tmpResourceGroupName string
tmpComputeName string
tmpDeploymentName string
tmpKeyVaultName string
tmpOSDiskName string
tmpWinRMCertificateUrl string
useDeviceLogin bool
// Authentication with the VM via SSH
sshAuthorizedKey string
sshPrivateKey string
// Authentication with the VM via WinRM
winrmCertificate string
Comm communicator.Config `mapstructure:",squash"`
ctx *interpolate.Context
}
type keyVaultCertificate struct {
Data string `json:"data"`
DataType string `json:"dataType"`
Password string `json:"password,omitempty"`
}
// If we ever feel the need to support more templates consider moving this
// method to its own factory class.
func (c *Config) toTemplateParameters() *TemplateParameters {
templateParameters := &TemplateParameters{
AdminUsername: &TemplateParameter{c.UserName},
AdminPassword: &TemplateParameter{c.Password},
DnsNameForPublicIP: &TemplateParameter{c.tmpComputeName},
ImageOffer: &TemplateParameter{c.ImageOffer},
ImagePublisher: &TemplateParameter{c.ImagePublisher},
ImageSku: &TemplateParameter{c.ImageSku},
ImageVersion: &TemplateParameter{c.ImageVersion},
OSDiskName: &TemplateParameter{c.tmpOSDiskName},
StorageAccountBlobEndpoint: &TemplateParameter{c.storageAccountBlobEndpoint},
VMSize: &TemplateParameter{c.VMSize},
VMName: &TemplateParameter{c.tmpComputeName},
}
switch c.OSType {
case constants.Target_Linux:
templateParameters.SshAuthorizedKey = &TemplateParameter{c.sshAuthorizedKey}
case constants.Target_Windows:
templateParameters.TenantId = &TemplateParameter{c.TenantID}
templateParameters.ObjectId = &TemplateParameter{c.ObjectID}
templateParameters.KeyVaultName = &TemplateParameter{c.tmpKeyVaultName}
templateParameters.KeyVaultSecretValue = &TemplateParameter{c.winrmCertificate}
templateParameters.WinRMCertificateUrl = &TemplateParameter{c.tmpWinRMCertificateUrl}
}
return templateParameters
}
func (c *Config) toVirtualMachineCaptureParameters() *compute.VirtualMachineCaptureParameters {
return &compute.VirtualMachineCaptureParameters{
DestinationContainerName: &c.CaptureContainerName,
VhdPrefix: &c.CaptureNamePrefix,
OverwriteVhds: to.BoolPtr(false),
}
}
func (c *Config) createCertificate() (string, error) {
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
err := fmt.Errorf("Failed to Generate Private Key: %s", err)
return "", err
}
host := fmt.Sprintf("%s.cloudapp.net", c.tmpComputeName)
notBefore := time.Now()
notAfter := notBefore.Add(365 * 24 * time.Hour)
serialNumber, err := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 128))
if err != nil {
err := fmt.Errorf("Failed to Generate Serial Number: %v", err)
return "", err
}
template := x509.Certificate{
SerialNumber: serialNumber,
Issuer: pkix.Name{
CommonName: host,
},
Subject: pkix.Name{
CommonName: host,
},
NotBefore: notBefore,
NotAfter: notAfter,
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
}
derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &privateKey.PublicKey, privateKey)
if err != nil {
err = fmt.Errorf("Failed to Create Certificate: %s", err)
return "", err
}
pfxBytes, err := pkcs12.Encode(derBytes, privateKey, c.tmpCertificatePassword)
if err != nil {
err = fmt.Errorf("Failed to encode certificate as PFX: %s", err)
return "", err
}
keyVaultDescription := keyVaultCertificate{
Data: base64.StdEncoding.EncodeToString(pfxBytes),
DataType: "pfx",
Password: c.tmpCertificatePassword,
}
bytes, err := json.Marshal(keyVaultDescription)
if err != nil {
err = fmt.Errorf("Failed to marshal key vault description: %s", err)
return "", err
}
return base64.StdEncoding.EncodeToString(bytes), nil
}
func newConfig(raws ...interface{}) (*Config, []string, error) {
var c Config
err := config.Decode(&c, &config.DecodeOpts{
Interpolate: true,
InterpolateContext: c.ctx,
}, raws...)
if err != nil {
return nil, nil, err
}
provideDefaultValues(&c)
setRuntimeValues(&c)
setUserNamePassword(&c)
err = setCloudEnvironment(&c)
if err != nil {
return nil, nil, err
}
err = setSshValues(&c)
if err != nil {
return nil, nil, err
}
err = setWinRMCertificate(&c)
if err != nil {
return nil, nil, err
}
var errs *packer.MultiError
errs = packer.MultiErrorAppend(errs, c.Comm.Prepare(c.ctx)...)
assertRequiredParametersSet(&c, errs)
if errs != nil && len(errs.Errors) > 0 {
return nil, nil, errs
}
return &c, nil, nil
}
func setSshValues(c *Config) error {
if c.Comm.SSHTimeout == 0 {
c.Comm.SSHTimeout = 20 * time.Minute
}
if c.Comm.SSHPrivateKey != "" {
privateKeyBytes, err := ioutil.ReadFile(c.Comm.SSHPrivateKey)
if err != nil {
panic(err)
}
signer, err := ssh.ParsePrivateKey(privateKeyBytes)
if err != nil {
panic(err)
}
publicKey := signer.PublicKey()
c.sshAuthorizedKey = fmt.Sprintf("%s %s packer Azure Deployment%s",
publicKey.Type(),
base64.StdEncoding.EncodeToString(publicKey.Marshal()),
time.Now().Format(time.RFC3339))
c.sshPrivateKey = string(privateKeyBytes)
} else {
sshKeyPair, err := NewOpenSshKeyPair()
if err != nil {
return err
}
c.sshAuthorizedKey = sshKeyPair.AuthorizedKey()
c.sshPrivateKey = sshKeyPair.PrivateKey()
}
c.Comm.WinRMTransportDecorator = func(t *http.Transport) http.RoundTripper {
return &ntlmssp.Negotiator{RoundTripper: t}
}
return nil
}
func setWinRMCertificate(c *Config) error {
cert, err := c.createCertificate()
c.winrmCertificate = cert
return err
}
func setRuntimeValues(c *Config) {
var tempName = NewTempName()
c.tmpAdminPassword = tempName.AdminPassword
c.tmpCertificatePassword = tempName.CertificatePassword
c.tmpComputeName = tempName.ComputeName
c.tmpDeploymentName = tempName.DeploymentName
c.tmpResourceGroupName = tempName.ResourceGroupName
c.tmpOSDiskName = tempName.OSDiskName
c.tmpKeyVaultName = tempName.KeyVaultName
}
func setUserNamePassword(c *Config) {
if c.Comm.SSHUsername == "" {
c.Comm.SSHUsername = DefaultUserName
}
c.UserName = c.Comm.SSHUsername
if c.Comm.SSHPassword != "" {
c.Password = c.Comm.SSHPassword
} else {
c.Password = c.tmpAdminPassword
}
}
func setCloudEnvironment(c *Config) error {
name := strings.ToUpper(c.CloudEnvironmentName)
switch name {
case "CHINA", "CHINACLOUD", "AZURECHINACLOUD":
c.cloudEnvironment = &azure.ChinaCloud
case "PUBLIC", "PUBLICCLOUD", "AZUREPUBLICCLOUD":
c.cloudEnvironment = &azure.PublicCloud
case "USGOVERNMENT", "USGOVERNMENTCLOUD", "AZUREUSGOVERNMENTCLOUD":
c.cloudEnvironment = &azure.USGovernmentCloud
default:
return fmt.Errorf("There is no cloud envionment matching the name '%s'!", c.CloudEnvironmentName)
}
return nil
}
func provideDefaultValues(c *Config) {
if c.VMSize == "" {
c.VMSize = DefaultVMSize
}
if c.ImageVersion == "" {
c.ImageVersion = DefaultImageVersion
}
if c.CloudEnvironmentName == "" {
c.CloudEnvironmentName = DefaultCloudEnvironmentName
}
}
func assertRequiredParametersSet(c *Config, errs *packer.MultiError) {
/////////////////////////////////////////////
// Authentication via OAUTH
// Check if device login is being asked for, and is allowed.
//
// Device login is enabled if the user only defines SubscriptionID and not
// ClientID, ClientSecret, and TenantID.
//
// Device login is not enabled for Windows because the WinRM certificate is
// readable by the ObjectID of the App. There may be another way to handle
// this case, but I am not currently aware of it - send feedback.
isUseDeviceLogin := func(c *Config) bool {
if c.OSType == constants.Target_Windows {
return false
}
return c.SubscriptionID != "" &&
c.ClientID == "" &&
c.ClientSecret == "" &&
c.TenantID == ""
}
if isUseDeviceLogin(c) {
c.useDeviceLogin = true
} else {
if c.ClientID == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A client_id must be specified"))
}
if c.ClientSecret == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A client_secret must be specified"))
}
if c.TenantID == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A tenant_id must be specified"))
}
if c.SubscriptionID == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A subscription_id must be specified"))
}
}
/////////////////////////////////////////////
// Capture
if c.CaptureContainerName == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("An capture_container_name must be specified"))
}
if c.CaptureNamePrefix == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("An capture_name_prefix must be specified"))
}
/////////////////////////////////////////////
// Compute
if c.ImagePublisher == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A image_publisher must be specified"))
}
if c.ImageOffer == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A image_offer must be specified"))
}
if c.ImageSku == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A image_sku must be specified"))
}
if c.Location == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A location must be specified"))
}
/////////////////////////////////////////////
// Deployment
if c.StorageAccount == "" {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("A storage_account must be specified"))
}
/////////////////////////////////////////////
// OS
if c.OSType != constants.Target_Linux && c.OSType != constants.Target_Windows {
errs = packer.MultiErrorAppend(errs, fmt.Errorf("An os_type must be specified"))
}
}