builder/vmware,virtualbox: checksum_type can be "none" [GH-471]

CHANGELOG.md

@@ -64,7 +64,9 @@ IMPROVEMENTS:
 * builder/virtualbox: Nice errors if Packer can't write to
   the output directory.
 * builder/virtualbox: ISO is ejected prior to export.
+* builder/virtualbox: Checksum type can be "none" [GH-471]
 * builder/vmware: Can now specify path to the Fusion application. [GH-677]
+* builder/vmware: Checksum type can be "none" [GH-471]
 * provisioner/puppet-masterless: Can now specify a `manifest_dir` to
   upload manifests to the remote machine for imports. [GH-655]
 

builder/virtualbox/iso/builder.go

@@ -187,10 +187,12 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 			errs, errors.New("The iso_checksum_type must be specified."))
 	} else {
 		b.config.ISOChecksumType = strings.ToLower(b.config.ISOChecksumType)
-		if h := common.HashForType(b.config.ISOChecksumType); h == nil {
+		if b.config.ISOChecksumType != "none" {
-			errs = packer.MultiErrorAppend(
+			if h := common.HashForType(b.config.ISOChecksumType); h == nil {
-				errs,
+				errs = packer.MultiErrorAppend(
-				fmt.Errorf("Unsupported checksum type: %s", b.config.ISOChecksumType))
+					errs,
+					fmt.Errorf("Unsupported checksum type: %s", b.config.ISOChecksumType))
+			}
 		}
 	}
 
@@ -236,6 +238,12 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 	}
 
 	// Warnings
+	if b.config.ISOChecksumType == "none" {
+		warnings = append(warnings,
+			"A checksum type of 'none' was specified. Since ISO files are so big,\n"+
+				"a checksum is highly recommended.")
+	}
+
 	if b.config.ShutdownCommand == "" {
 		warnings = append(warnings,
 			"A shutdown_command was not specified. Without a shutdown command, Packer\n"+

builder/virtualbox/iso/builder_test.go

@@ -383,6 +383,21 @@ func TestBuilderPrepare_ISOChecksumType(t *testing.T) {
 	if err == nil {
 		t.Fatal("should have error")
 	}
+
+	// Test none
+	config["iso_checksum_type"] = "none"
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) == 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.ISOChecksumType != "none" {
+		t.Fatalf("should've lowercased: %s", b.config.ISOChecksumType)
+	}
 }
 
 func TestBuilderPrepare_ISOUrl(t *testing.T) {

builder/vmware/iso/builder.go

@@ -218,10 +218,12 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 			errs, errors.New("The iso_checksum_type must be specified."))
 	} else {
 		b.config.ISOChecksumType = strings.ToLower(b.config.ISOChecksumType)
-		if h := common.HashForType(b.config.ISOChecksumType); h == nil {
+		if b.config.ISOChecksumType != "none" {
-			errs = packer.MultiErrorAppend(
+			if h := common.HashForType(b.config.ISOChecksumType); h == nil {
-				errs,
+				errs = packer.MultiErrorAppend(
-				fmt.Errorf("Unsupported checksum type: %s", b.config.ISOChecksumType))
+					errs,
+					fmt.Errorf("Unsupported checksum type: %s", b.config.ISOChecksumType))
+			}
 		}
 	}
 
@@ -270,6 +272,12 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 	}
 
 	// Warnings
+	if b.config.ISOChecksumType == "none" {
+		warnings = append(warnings,
+			"A checksum type of 'none' was specified. Since ISO files are so big,\n"+
+				"a checksum is highly recommended.")
+	}
+
 	if b.config.ShutdownCommand == "" {
 		warnings = append(warnings,
 			"A shutdown_command was not specified. Without a shutdown command, Packer\n"+

builder/vmware/iso/builder_test.go

@@ -98,7 +98,23 @@ func TestBuilderPrepare_ISOChecksumType(t *testing.T) {
 	if err == nil {
 		t.Fatal("should have error")
 	}
+
+	// Test none
+	config["iso_checksum_type"] = "none"
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) == 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.ISOChecksumType != "none" {
+		t.Fatalf("should've lowercased: %s", b.config.ISOChecksumType)
+	}
 }
+
 func TestBuilderPrepare_Defaults(t *testing.T) {
 	var b Builder
 	config := testConfig()

website/source/docs/builders/virtualbox-iso.html.markdown

@@ -54,7 +54,10 @@ Required:
   checksum is specified with `iso_checksum_type`, documented below.
 
 * `iso_checksum_type` (string) - The type of the checksum specified in
-  `iso_checksum`. Valid values are "md5", "sha1", "sha256", or "sha512" currently.
+  `iso_checksum`. Valid values are "none", "md5", "sha1", "sha256", or
+  "sha512" currently. While "none" will skip checksumming, this is not
+  recommended since ISO files are generally large and corruption does happen
+  from time to time.
 
 * `iso_url` (string) - A URL to the ISO containing the installation image.
   This URL can be either an HTTP URL or a file URL (or path to a file).

website/source/docs/builders/vmware-iso.html.markdown

@@ -55,7 +55,10 @@ Required:
   checksum is specified with `iso_checksum_type`, documented below.
 
 * `iso_checksum_type` (string) - The type of the checksum specified in
-  `iso_checksum`. Valid values are "md5", "sha1", "sha256", or "sha512" currently.
+  `iso_checksum`. Valid values are "none", "md5", "sha1", "sha256", or
+  "sha512" currently. While "none" will skip checksumming, this is not
+  recommended since ISO files are generally large and corruption does happen
+  from time to time.
 
 * `iso_url` (string) - A URL to the ISO containing the installation image.
   This URL can be either an HTTP URL or a file URL (or path to a file).