feat(namespace): add normalization function for namespace

dns.go

@@ -165,11 +165,7 @@ func getMapResponseDNSConfig(
 			dnsConfig.Domains,
 			fmt.Sprintf(
 				"%s.%s",
-				strings.ReplaceAll(
-					machine.Namespace.Name,
-					"@",
-					".",
-				), // Replace @ with . for valid domain for machine
+				machine.Namespace.Name,
 				baseDomain,
 			),
 		)

machine.go

@@ -724,11 +724,7 @@ func (machine Machine) toNode(
 		hostname = fmt.Sprintf(
 			"%s.%s.%s",
 			machine.Name,
-			strings.ReplaceAll(
-				machine.Namespace.Name,
-				"@",
-				".",
-			), // Replace @ with . for valid domain for machine
+			machine.Namespace.Name,
 			baseDomain,
 		)
 	} else {

namespaces.go

@@ -2,7 +2,10 @@ package headscale
 
 import (
 	"errors"
+	"fmt"
+	"regexp"
 	"strconv"
+	"strings"
 	"time"
 
 	v1 "github.com/juanfont/headscale/gen/go/headscale/v1"
@@ -16,8 +19,11 @@ const (
 	errNamespaceExists          = Error("Namespace already exists")
 	errNamespaceNotFound        = Error("Namespace not found")
 	errNamespaceNotEmptyOfNodes = Error("Namespace not empty: node(s) found")
+	errInvalidNamespaceName     = Error("Invalid namespace name")
 )
 
+var normalizeNamespaceRegex = regexp.MustCompile("[^a-z0-9-.]+")
+
 // Namespace is the way Headscale implements the concept of users in Tailscale
 //
 // At the end of the day, users in Tailscale are some kind of 'bubbles' or namespaces
@@ -30,7 +36,12 @@ type Namespace struct {
 // CreateNamespace creates a new Namespace. Returns error if could not be created
 // or another namespace already exists.
 func (h *Headscale) CreateNamespace(name string) (*Namespace, error) {
+	var err error
 	namespace := Namespace{}
+	name, err = NormalizeNamespaceName(name)
+	if err != nil {
+		return nil, err
+	}
 	if err := h.db.Where("name = ?", name).First(&namespace).Error; err == nil {
 		return nil, errNamespaceExists
 	}
@@ -50,6 +61,10 @@ func (h *Headscale) CreateNamespace(name string) (*Namespace, error) {
 // DestroyNamespace destroys a Namespace. Returns error if the Namespace does
 // not exist or if there are machines associated with it.
 func (h *Headscale) DestroyNamespace(name string) error {
+	name, err := NormalizeNamespaceName(name)
+	if err != nil {
+		return err
+	}
 	namespace, err := h.GetNamespace(name)
 	if err != nil {
 		return errNamespaceNotFound
@@ -84,10 +99,15 @@ func (h *Headscale) DestroyNamespace(name string) error {
 // RenameNamespace renames a Namespace. Returns error if the Namespace does
 // not exist or if another Namespace exists with the new name.
 func (h *Headscale) RenameNamespace(oldName, newName string) error {
+	var err error
 	oldNamespace, err := h.GetNamespace(oldName)
 	if err != nil {
 		return err
 	}
+	newName, err = NormalizeNamespaceName(newName)
+	if err != nil {
+		return err
+	}
 	_, err = h.GetNamespace(newName)
 	if err == nil {
 		return errNamespaceExists
@@ -108,6 +128,10 @@ func (h *Headscale) RenameNamespace(oldName, newName string) error {
 // GetNamespace fetches a namespace by name.
 func (h *Headscale) GetNamespace(name string) (*Namespace, error) {
 	namespace := Namespace{}
+	name, err := NormalizeNamespaceName(name)
+	if err != nil {
+		return nil, err
+	}
 	if result := h.db.First(&namespace, "name = ?", name); errors.Is(
 		result.Error,
 		gorm.ErrRecordNotFound,
@@ -130,6 +154,10 @@ func (h *Headscale) ListNamespaces() ([]Namespace, error) {
 
 // ListMachinesInNamespace gets all the nodes in a given namespace.
 func (h *Headscale) ListMachinesInNamespace(name string) ([]Machine, error) {
+	name, err := NormalizeNamespaceName(name)
+	if err != nil {
+		return nil, err
+	}
 	namespace, err := h.GetNamespace(name)
 	if err != nil {
 		return nil, err
@@ -145,6 +173,10 @@ func (h *Headscale) ListMachinesInNamespace(name string) ([]Machine, error) {
 
 // ListSharedMachinesInNamespace returns all the machines that are shared to the specified namespace.
 func (h *Headscale) ListSharedMachinesInNamespace(name string) ([]Machine, error) {
+	name, err := NormalizeNamespaceName(name)
+	if err != nil {
+		return nil, err
+	}
 	namespace, err := h.GetNamespace(name)
 	if err != nil {
 		return nil, err
@@ -170,6 +202,10 @@ func (h *Headscale) ListSharedMachinesInNamespace(name string) ([]Machine, error
 
 // SetMachineNamespace assigns a Machine to a namespace.
 func (h *Headscale) SetMachineNamespace(machine *Machine, namespaceName string) error {
+	namespaceName, err := NormalizeNamespaceName(namespaceName)
+	if err != nil {
+		return err
+	}
 	namespace, err := h.GetNamespace(namespaceName)
 	if err != nil {
 		return err
@@ -233,3 +269,24 @@ func (n *Namespace) toProto() *v1.Namespace {
 		CreatedAt: timestamppb.New(n.CreatedAt),
 	}
 }
+
+// NormalizeNamespaceName will replace forbidden chars in namespace
+// it can also return an error if the namespace doesn't respect RFC 952 and 1123
+func NormalizeNamespaceName(name string) (string, error) {
+	name = strings.ToLower(name)
+	name = strings.ReplaceAll(name, "@", ".")
+	name = strings.ReplaceAll(name, "'", "")
+	name = normalizeNamespaceRegex.ReplaceAllString(name, "-")
+
+	for _, elt := range strings.Split(name, ".") {
+		if len(elt) > 63 {
+			return "", fmt.Errorf(
+				"label %v is more than 63 chars: %w",
+				elt,
+				errInvalidNamespaceName,
+			)
+		}
+	}
+
+	return name, nil
+}

namespaces_test.go

@@ -1,6 +1,8 @@
 package headscale
 
 import (
+	"testing"
+
 	"github.com/rs/zerolog/log"
 	"gopkg.in/check.v1"
 	"gorm.io/gorm"
@@ -239,3 +241,62 @@ func (s *Suite) TestGetMapResponseUserProfiles(c *check.C) {
 	}
 	c.Assert(found, check.Equals, true)
 }
+
+func TestNormalizeNamespaceName(t *testing.T) {
+	type args struct {
+		name string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    string
+		wantErr bool
+	}{
+		{
+			name:    "normalize simple name",
+			args:    args{name: "normalize-simple.name"},
+			want:    "normalize-simple.name",
+			wantErr: false,
+		},
+		{
+			name:    "normalize an email",
+			args:    args{name: "foo.bar@example.com"},
+			want:    "foo.bar.example.com",
+			wantErr: false,
+		},
+		{
+			name:    "normalize complex email",
+			args:    args{name: "foo.bar+complex-email@example.com"},
+			want:    "foo.bar-complex-email.example.com",
+			wantErr: false,
+		},
+		{
+			name:    "namespace name with space",
+			args:    args{name: "name space"},
+			want:    "name-space",
+			wantErr: false,
+		},
+		{
+			name:    "namespace with quote",
+			args:    args{name: "Jamie's iPhone 5"},
+			want:    "jamies-iphone-5",
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := NormalizeNamespaceName(tt.args.name)
+			if (err != nil) != tt.wantErr {
+				t.Errorf(
+					"NormalizeNamespaceName() error = %v, wantErr %v",
+					err,
+					tt.wantErr,
+				)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("NormalizeNamespaceName() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

oidc_test.go

@@ -1,180 +0,0 @@
-package headscale
-
-import (
-	"sync"
-	"testing"
-
-	"github.com/coreos/go-oidc/v3/oidc"
-	"github.com/patrickmn/go-cache"
-	"golang.org/x/oauth2"
-	"gorm.io/gorm"
-	"tailscale.com/tailcfg"
-	"tailscale.com/types/key"
-)
-
-func TestHeadscale_getNamespaceFromEmail(t *testing.T) {
-	type fields struct {
-		cfg             Config
-		db              *gorm.DB
-		dbString        string
-		dbType          string
-		dbDebug         bool
-		privateKey      *key.MachinePrivate
-		aclPolicy       *ACLPolicy
-		aclRules        []tailcfg.FilterRule
-		lastStateChange sync.Map
-		oidcProvider    *oidc.Provider
-		oauth2Config    *oauth2.Config
-		oidcStateCache  *cache.Cache
-	}
-	type args struct {
-		email string
-	}
-	tests := []struct {
-		name   string
-		fields fields
-		args   args
-		want   string
-		want1  bool
-	}{
-		{
-			name: "match all",
-			fields: fields{
-				cfg: Config{
-					OIDC: OIDCConfig{
-						MatchMap: map[string]string{
-							".*": "space",
-						},
-					},
-				},
-			},
-			args: args{
-				email: "test@example.no",
-			},
-			want:  "space",
-			want1: true,
-		},
-		{
-			name: "match user",
-			fields: fields{
-				cfg: Config{
-					OIDC: OIDCConfig{
-						MatchMap: map[string]string{
-							"specific@user\\.no": "user-namespace",
-						},
-					},
-				},
-			},
-			args: args{
-				email: "specific@user.no",
-			},
-			want:  "user-namespace",
-			want1: true,
-		},
-		{
-			name: "match domain",
-			fields: fields{
-				cfg: Config{
-					OIDC: OIDCConfig{
-						MatchMap: map[string]string{
-							".*@example\\.no": "example",
-						},
-					},
-				},
-			},
-			args: args{
-				email: "test@example.no",
-			},
-			want:  "example",
-			want1: true,
-		},
-		{
-			name: "multi match domain",
-			fields: fields{
-				cfg: Config{
-					OIDC: OIDCConfig{
-						MatchMap: map[string]string{
-							".*@example\\.no": "exammple",
-							".*@gmail\\.com":  "gmail",
-						},
-					},
-				},
-			},
-			args: args{
-				email: "someuser@gmail.com",
-			},
-			want:  "gmail",
-			want1: true,
-		},
-		{
-			name: "no match domain",
-			fields: fields{
-				cfg: Config{
-					OIDC: OIDCConfig{
-						MatchMap: map[string]string{
-							".*@dontknow.no": "never",
-						},
-					},
-				},
-			},
-			args: args{
-				email: "test@wedontknow.no",
-			},
-			want:  "",
-			want1: false,
-		},
-		{
-			name: "multi no match domain",
-			fields: fields{
-				cfg: Config{
-					OIDC: OIDCConfig{
-						MatchMap: map[string]string{
-							".*@dontknow.no":   "never",
-							".*@wedontknow.no": "other",
-							".*\\.no":          "stuffy",
-						},
-					},
-				},
-			},
-			args: args{
-				email: "tasy@nonofthem.com",
-			},
-			want:  "",
-			want1: false,
-		},
-	}
-	//nolint
-	for _, test := range tests {
-		t.Run(test.name, func(t *testing.T) {
-			app := &Headscale{
-				cfg:             test.fields.cfg,
-				db:              test.fields.db,
-				dbString:        test.fields.dbString,
-				dbType:          test.fields.dbType,
-				dbDebug:         test.fields.dbDebug,
-				privateKey:      test.fields.privateKey,
-				aclPolicy:       test.fields.aclPolicy,
-				aclRules:        test.fields.aclRules,
-				lastStateChange: test.fields.lastStateChange,
-				oidcProvider:    test.fields.oidcProvider,
-				oauth2Config:    test.fields.oauth2Config,
-				oidcStateCache:  test.fields.oidcStateCache,
-			}
-			got, got1 := app.getNamespaceFromEmail(test.args.email)
-			if got != test.want {
-				t.Errorf(
-					"Headscale.getNamespaceFromEmail() got = %v, want %v",
-					got,
-					test.want,
-				)
-			}
-			if got1 != test.want1 {
-				t.Errorf(
-					"Headscale.getNamespaceFromEmail() got1 = %v, want %v",
-					got1,
-					test.want1,
-				)
-			}
-		})
-	}
-}