feat: add strip_email_domain to normalization of namespace

app.go

@@ -107,9 +107,10 @@ type Config struct {
 }
 
 type OIDCConfig struct {
-	Issuer       string
-	ClientID     string
-	ClientSecret string
+	Issuer           string
+	ClientID         string
+	ClientSecret     string
+	StripEmaildomain bool
 }
 
 type DERPConfig struct {

cmd/headscale/cli/utils.go

@@ -63,6 +63,8 @@ func LoadConfig(path string) error {
 	viper.SetDefault("cli.timeout", "5s")
 	viper.SetDefault("cli.insecure", false)
 
+	viper.SetDefault("oidc.strip_email_domain", true)
+
 	if err := viper.ReadInConfig(); err != nil {
 		return fmt.Errorf("fatal error reading config file: %w", err)
 	}
@@ -323,9 +325,10 @@ func getHeadscaleConfig() headscale.Config {
 		UnixSocketPermission: GetFileMode("unix_socket_permission"),
 
 		OIDC: headscale.OIDCConfig{
-			Issuer:       viper.GetString("oidc.issuer"),
-			ClientID:     viper.GetString("oidc.client_id"),
-			ClientSecret: viper.GetString("oidc.client_secret"),
+			Issuer:           viper.GetString("oidc.issuer"),
+			ClientID:         viper.GetString("oidc.client_id"),
+			ClientSecret:     viper.GetString("oidc.client_secret"),
+			StripEmaildomain: viper.GetBool("oidc.strip_email_domain"),
 		},
 
 		CLI: headscale.CLIConfig{

config-example.yaml

@@ -180,3 +180,9 @@ unix_socket_permission: "0770"
 #   client_id: "your-oidc-client-id"
 #   client_secret: "your-oidc-client-secret"
 #
+#   If `strip_email_domain` is set to `true`, the domain part of the username email address will be removed.
+#   This will transform `first-name.last-name@example.com` to the namespace `first-name.last-name`
+#   If `strip_email_domain` is set to `false` the domain part will NOT be removed resulting to the following
+#   namespace: `first-name.last-name.example.com`
+#
+#   strip_email_domain: true

namespaces.go

@@ -268,10 +268,15 @@ func (n *Namespace) toProto() *v1.Namespace {
 
 // 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) {
+func NormalizeNamespaceName(name string, stripEmailDomain bool) (string, error) {
 	name = strings.ToLower(name)
-	name = strings.ReplaceAll(name, "@", ".")
 	name = strings.ReplaceAll(name, "'", "")
+	if stripEmailDomain {
+		idx := strings.Index(name, "@")
+		name = name[:idx]
+	} else {
+		name = strings.ReplaceAll(name, "@", ".")
+	}
 	name = invalidCharsInNamespaceRegex.ReplaceAllString(name, "-")
 
 	for _, elt := range strings.Split(name, ".") {

namespaces_test.go

@@ -244,7 +244,8 @@ func (s *Suite) TestGetMapResponseUserProfiles(c *check.C) {
 
 func TestNormalizeNamespaceName(t *testing.T) {
 	type args struct {
-		name string
+		name             string
+		stripEmailDomain bool
 	}
 	tests := []struct {
 		name    string
@@ -253,39 +254,63 @@ func TestNormalizeNamespaceName(t *testing.T) {
 		wantErr bool
 	}{
 		{
-			name:    "normalize simple name",
-			args:    args{name: "normalize-simple.name"},
+			name: "normalize simple name",
+			args: args{
+				name:             "normalize-simple.name",
+				stripEmailDomain: false,
+			},
 			want:    "normalize-simple.name",
 			wantErr: false,
 		},
 		{
-			name:    "normalize an email",
-			args:    args{name: "foo.bar@example.com"},
+			name: "normalize an email",
+			args: args{
+				name:             "foo.bar@example.com",
+				stripEmailDomain: false,
+			},
 			want:    "foo.bar.example.com",
 			wantErr: false,
 		},
 		{
-			name:    "normalize complex email",
-			args:    args{name: "foo.bar+complex-email@example.com"},
+			name: "normalize an email domain should be removed",
+			args: args{
+				name:             "foo.bar@example.com",
+				stripEmailDomain: true,
+			},
+			want:    "foo.bar",
+			wantErr: false,
+		},
+		{
+			name: "normalize complex email",
+			args: args{
+				name:             "foo.bar+complex-email@example.com",
+				stripEmailDomain: false,
+			},
 			want:    "foo.bar-complex-email.example.com",
 			wantErr: false,
 		},
 		{
-			name:    "namespace name with space",
-			args:    args{name: "name space"},
+			name: "namespace name with space",
+			args: args{
+				name:             "name space",
+				stripEmailDomain: false,
+			},
 			want:    "name-space",
 			wantErr: false,
 		},
 		{
-			name:    "namespace with quote",
-			args:    args{name: "Jamie's iPhone 5"},
+			name: "namespace with quote",
+			args: args{
+				name:             "Jamie's iPhone 5",
+				stripEmailDomain: false,
+			},
 			want:    "jamies-iphone-5",
 			wantErr: false,
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got, err := NormalizeNamespaceName(tt.args.name)
+			got, err := NormalizeNamespaceName(tt.args.name, tt.args.stripEmailDomain)
 			if (err != nil) != tt.wantErr {
 				t.Errorf(
 					"NormalizeNamespaceName() error = %v, wantErr %v",

oidc.go

@@ -281,7 +281,7 @@ func (h *Headscale) OIDCCallback(ctx *gin.Context) {
 
 	now := time.Now().UTC()
 
-	namespaceName, err := NormalizeNamespaceName(claims.Email)
+	namespaceName, err := NormalizeNamespaceName(claims.Email, h.cfg.OIDC.StripEmaildomain)
 	if err != nil {
 		log.Error().Err(err).Caller().Msgf("couldn't normalize email")
 		ctx.String(