types/netmap: remove PrivateKey from NetworkMap

It's an unnecessary nuisance having it. We go out of our way to redact
it in so many places when we don't even need it there anyway.

Updates #12639

Change-Id: I5fc72e19e9cf36caeb42cf80ba430873f67167c3
Signed-off-by: Brad Fitzpatrick <[email protected]>

client/systray/systray.go

@@ -512,7 +512,7 @@ func (menu *Menu) watchIPNBus() {
 }
 
 func (menu *Menu) watchIPNBusInner() error {
-	watcher, err := menu.lc.WatchIPNBus(menu.bgCtx, ipn.NotifyNoPrivateKeys)
+	watcher, err := menu.lc.WatchIPNBus(menu.bgCtx, 0)
 	if err != nil {
 		return fmt.Errorf("watching ipn bus: %w", err)
 	}

cmd/sniproxy/sniproxy.go

@@ -141,7 +141,7 @@ func run(ctx context.Context, ts *tsnet.Server, wgPort int, hostname string, pro
 	// in the netmap.
 	// We set the NotifyInitialNetMap flag so we will always get woken with the
 	// current netmap, before only being woken on changes.
-	bus, err := lc.WatchIPNBus(ctx, ipn.NotifyWatchEngineUpdates|ipn.NotifyInitialNetMap|ipn.NotifyNoPrivateKeys)
+	bus, err := lc.WatchIPNBus(ctx, ipn.NotifyWatchEngineUpdates|ipn.NotifyInitialNetMap)
 	if err != nil {
 		log.Fatalf("watching IPN bus: %v", err)
 	}

cmd/stund/depaware.txt

@@ -82,8 +82,9 @@ tailscale.com/cmd/stund dependencies: (generated by github.com/tailscale/depawar
         tailscale.com/util/mak                                       from tailscale.com/syncs+
         tailscale.com/util/nocasemaps                                from tailscale.com/types/ipproto
         tailscale.com/util/rands                                     from tailscale.com/tsweb
+        tailscale.com/util/set                                       from tailscale.com/types/key
         tailscale.com/util/slicesx                                   from tailscale.com/tailcfg
-        tailscale.com/util/testenv                                   from tailscale.com/types/logger
+        tailscale.com/util/testenv                                   from tailscale.com/types/logger+
         tailscale.com/util/vizerror                                  from tailscale.com/tailcfg+
         tailscale.com/version                                        from tailscale.com/envknob+
         tailscale.com/version/distro                                 from tailscale.com/envknob
@@ -94,7 +95,7 @@ tailscale.com/cmd/stund dependencies: (generated by github.com/tailscale/depawar
         golang.org/x/crypto/nacl/box                                 from tailscale.com/types/key
         golang.org/x/crypto/nacl/secretbox                           from golang.org/x/crypto/nacl/box
         golang.org/x/crypto/salsa20/salsa                            from golang.org/x/crypto/nacl/box+
-        golang.org/x/exp/constraints                                 from tailscale.com/tsweb/varz
+        golang.org/x/exp/constraints                                 from tailscale.com/tsweb/varz+
         golang.org/x/sys/cpu                                         from golang.org/x/crypto/blake2b+
   LD    golang.org/x/sys/unix                                        from github.com/prometheus/procfs+
    W    golang.org/x/sys/windows                                     from github.com/prometheus/client_golang/prometheus

cmd/tailscale/cli/debug.go

@@ -258,7 +258,6 @@ func debugCmd() *ffcli.Command {
 					fs.BoolVar(&watchIPNArgs.netmap, "netmap", true, "include netmap in messages")
 					fs.BoolVar(&watchIPNArgs.initial, "initial", false, "include initial status")
 					fs.BoolVar(&watchIPNArgs.rateLimit, "rate-limit", true, "rate limit messags")
-					fs.BoolVar(&watchIPNArgs.showPrivateKey, "show-private-key", false, "include node private key in printed netmap")
 					fs.IntVar(&watchIPNArgs.count, "count", 0, "exit after printing this many statuses, or 0 to keep going forever")
 					return fs
 				})(),
@@ -270,7 +269,6 @@ func debugCmd() *ffcli.Command {
 				ShortHelp:  "Print the current network map",
 				FlagSet: (func() *flag.FlagSet {
 					fs := newFlagSet("netmap")
-					fs.BoolVar(&netmapArgs.showPrivateKey, "show-private-key", false, "include node private key in printed netmap")
 					return fs
 				})(),
 			},
@@ -614,11 +612,10 @@ func runPrefs(ctx context.Context, args []string) error {
 }
 
 var watchIPNArgs struct {
-	netmap         bool
-	initial        bool
-	showPrivateKey bool
-	rateLimit      bool
-	count          int
+	netmap    bool
+	initial   bool
+	rateLimit bool
+	count     int
 }
 
 func runWatchIPN(ctx context.Context, args []string) error {
@@ -626,9 +623,6 @@ func runWatchIPN(ctx context.Context, args []string) error {
 	if watchIPNArgs.initial {
 		mask = ipn.NotifyInitialState | ipn.NotifyInitialPrefs | ipn.NotifyInitialNetMap
 	}
-	if !watchIPNArgs.showPrivateKey {
-		mask |= ipn.NotifyNoPrivateKeys
-	}
 	if watchIPNArgs.rateLimit {
 		mask |= ipn.NotifyRateLimit
 	}
@@ -652,18 +646,11 @@ func runWatchIPN(ctx context.Context, args []string) error {
 	return nil
 }
 
-var netmapArgs struct {
-	showPrivateKey bool
-}
-
 func runNetmap(ctx context.Context, args []string) error {
 	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
 	defer cancel()
 
 	var mask ipn.NotifyWatchOpt = ipn.NotifyInitialNetMap
-	if !netmapArgs.showPrivateKey {
-		mask |= ipn.NotifyNoPrivateKeys
-	}
 	watcher, err := localClient.WatchIPNBus(ctx, mask)
 	if err != nil {
 		return err

cmd/tailscale/cli/serve_v2.go

@@ -475,7 +475,7 @@ func (e *serveEnv) runServeCombined(subcmd serveMode) execFunc {
 			// if foreground mode, create a WatchIPNBus session
 			// and use the nested config for all following operations
 			// TODO(marwan-at-work): nested-config validations should happen here or previous to this point.
-			watcher, err = e.lc.WatchIPNBus(ctx, ipn.NotifyInitialState|ipn.NotifyNoPrivateKeys)
+			watcher, err = e.lc.WatchIPNBus(ctx, ipn.NotifyInitialState)
 			if err != nil {
 				return err
 			}

cmd/tsidp/tsidp.go

@@ -287,7 +287,7 @@ func serveOnLocalTailscaled(ctx context.Context, lc *local.Client, st *ipnstate.
 	// We watch the IPN bus just to get a session ID. The session expires
 	// when we stop watching the bus, and that auto-deletes the foreground
 	// serve/funnel configs we are creating below.
-	watcher, err := lc.WatchIPNBus(ctx, ipn.NotifyInitialState|ipn.NotifyNoPrivateKeys)
+	watcher, err := lc.WatchIPNBus(ctx, ipn.NotifyInitialState)
 	if err != nil {
 		return nil, nil, fmt.Errorf("could not set up ipn bus watcher: %v", err)
 	}

control/controlclient/map.go

@@ -867,7 +867,6 @@ func (ms *mapSession) netmap() *netmap.NetworkMap {
 
 	nm := &netmap.NetworkMap{
 		NodeKey:           ms.publicNodeKey,
-		PrivateKey:        ms.privateNodeKey,
 		MachineKey:        ms.machinePubKey,
 		Peers:             peerViews,
 		UserProfiles:      make(map[tailcfg.UserID]tailcfg.UserProfileView),

ipn/backend.go

@@ -74,7 +74,7 @@ const (
 	NotifyInitialPrefs  NotifyWatchOpt = 1 << 2 // if set, the first Notify message (sent immediately) will contain the current Prefs
 	NotifyInitialNetMap NotifyWatchOpt = 1 << 3 // if set, the first Notify message (sent immediately) will contain the current NetMap
 
-	NotifyNoPrivateKeys        NotifyWatchOpt = 1 << 4 // if set, private keys that would normally be sent in updates are zeroed out
+	NotifyNoPrivateKeys        NotifyWatchOpt = 1 << 4 // (no-op) it used to redact private keys; now they always are and this does nothing
 	NotifyInitialDriveShares   NotifyWatchOpt = 1 << 5 // if set, the first Notify message (sent immediately) will contain the current Taildrive Shares
 	NotifyInitialOutgoingFiles NotifyWatchOpt = 1 << 6 // if set, the first Notify message (sent immediately) will contain the current Taildrop OutgoingFiles
 

ipn/ipnlocal/c2n.go

@@ -179,7 +179,6 @@ func handleC2NDebugNetMap(b *LocalBackend, w http.ResponseWriter, r *http.Reques
 			}
 			field.SetZero()
 		}
-		nm, _ = redactNetmapPrivateKeys(nm)
 		return json.Marshal(nm)
 	}
 

ipn/ipnlocal/c2n_test.go

@@ -13,21 +13,17 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
-	"strings"
 	"testing"
 	"time"
 
 	"tailscale.com/ipn/store/mem"
 	"tailscale.com/tailcfg"
 	"tailscale.com/tstest"
-	"tailscale.com/types/ipproto"
 	"tailscale.com/types/key"
 	"tailscale.com/types/logger"
 	"tailscale.com/types/netmap"
 	"tailscale.com/types/views"
 	"tailscale.com/util/must"
-	"tailscale.com/util/set"
-	"tailscale.com/wgengine/filter/filtertype"
 
 	gcmp "github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
@@ -144,338 +140,6 @@ func TestHandleC2NTLSCertStatus(t *testing.T) {
 
 }
 
-// eachStructField calls cb for each struct field in struct type tp, recursively.
-func eachStructField(tp reflect.Type, cb func(reflect.Type, reflect.StructField)) {
-	if !strings.HasPrefix(tp.PkgPath(), "tailscale.com/") {
-		// Stop traversing when we reach a non-tailscale type.
-		return
-	}
-
-	for i := range tp.NumField() {
-		cb(tp, tp.Field(i))
-
-		switch tp.Field(i).Type.Kind() {
-		case reflect.Struct:
-			eachStructField(tp.Field(i).Type, cb)
-		case reflect.Slice, reflect.Array, reflect.Ptr, reflect.Map:
-			if tp.Field(i).Type.Elem().Kind() == reflect.Struct {
-				eachStructField(tp.Field(i).Type.Elem(), cb)
-			}
-		}
-	}
-}
-
-// eachStructValue calls cb for each struct field in the struct value v, recursively.
-func eachStructValue(v reflect.Value, cb func(reflect.Type, reflect.StructField, reflect.Value)) {
-	if v.IsZero() {
-		return
-	}
-
-	for i := range v.NumField() {
-		cb(v.Type(), v.Type().Field(i), v.Field(i))
-
-		switch v.Type().Field(i).Type.Kind() {
-		case reflect.Struct:
-			eachStructValue(v.Field(i), cb)
-		case reflect.Slice, reflect.Array, reflect.Ptr, reflect.Map:
-			if v.Field(i).Type().Elem().Kind() == reflect.Struct {
-				eachStructValue(v.Field(i).Addr().Elem(), cb)
-			}
-		}
-	}
-}
-
-// TestRedactNetmapPrivateKeys tests that redactNetmapPrivateKeys redacts all private keys
-// and other private fields from a netmap.NetworkMap, and only those fields.
-func TestRedactNetmapPrivateKeys(t *testing.T) {
-	type field struct {
-		t reflect.Type
-		f string
-	}
-	f := func(t any, f string) field {
-		return field{reflect.TypeOf(t), f}
-	}
-	// fields is a map of all struct fields in netmap.NetworkMap and its
-	// sub-structs, marking each field as private (true) or public (false).
-	// If you add a new field to netmap.NetworkMap or its sub-structs,
-	// you must add it to this list, marking it as private or public.
-	fields := map[field]bool{
-		// Private fields to be redacted.
-		f(netmap.NetworkMap{}, "PrivateKey"): true,
-
-		// All other fields are public.
-		f(netmap.NetworkMap{}, "AllCaps"):                  false,
-		f(netmap.NetworkMap{}, "CollectServices"):          false,
-		f(netmap.NetworkMap{}, "DERPMap"):                  false,
-		f(netmap.NetworkMap{}, "DNS"):                      false,
-		f(netmap.NetworkMap{}, "DisplayMessages"):          false,
-		f(netmap.NetworkMap{}, "Domain"):                   false,
-		f(netmap.NetworkMap{}, "DomainAuditLogID"):         false,
-		f(netmap.NetworkMap{}, "Expiry"):                   false,
-		f(netmap.NetworkMap{}, "MachineKey"):               false,
-		f(netmap.NetworkMap{}, "Name"):                     false,
-		f(netmap.NetworkMap{}, "NodeKey"):                  false,
-		f(netmap.NetworkMap{}, "PacketFilter"):             false,
-		f(netmap.NetworkMap{}, "PacketFilterRules"):        false,
-		f(netmap.NetworkMap{}, "Peers"):                    false,
-		f(netmap.NetworkMap{}, "SSHPolicy"):                false,
-		f(netmap.NetworkMap{}, "SelfNode"):                 false,
-		f(netmap.NetworkMap{}, "TKAEnabled"):               false,
-		f(netmap.NetworkMap{}, "TKAHead"):                  false,
-		f(netmap.NetworkMap{}, "UserProfiles"):             false,
-		f(filtertype.CapMatch{}, "Cap"):                    false,
-		f(filtertype.CapMatch{}, "Dst"):                    false,
-		f(filtertype.CapMatch{}, "Values"):                 false,
-		f(filtertype.Match{}, "Caps"):                      false,
-		f(filtertype.Match{}, "Dsts"):                      false,
-		f(filtertype.Match{}, "IPProto"):                   false,
-		f(filtertype.Match{}, "SrcCaps"):                   false,
-		f(filtertype.Match{}, "Srcs"):                      false,
-		f(filtertype.Match{}, "SrcsContains"):              false,
-		f(filtertype.NetPortRange{}, "Net"):                false,
-		f(filtertype.NetPortRange{}, "Ports"):              false,
-		f(filtertype.PortRange{}, "First"):                 false,
-		f(filtertype.PortRange{}, "Last"):                  false,
-		f(key.DiscoPublic{}, "k"):                          false,
-		f(key.MachinePublic{}, "k"):                        false,
-		f(key.NodePrivate{}, "_"):                          false,
-		f(key.NodePrivate{}, "k"):                          false,
-		f(key.NodePublic{}, "k"):                           false,
-		f(tailcfg.CapGrant{}, "CapMap"):                    false,
-		f(tailcfg.CapGrant{}, "Caps"):                      false,
-		f(tailcfg.CapGrant{}, "Dsts"):                      false,
-		f(tailcfg.DERPHomeParams{}, "RegionScore"):         false,
-		f(tailcfg.DERPMap{}, "HomeParams"):                 false,
-		f(tailcfg.DERPMap{}, "OmitDefaultRegions"):         false,
-		f(tailcfg.DERPMap{}, "Regions"):                    false,
-		f(tailcfg.DNSConfig{}, "CertDomains"):              false,
-		f(tailcfg.DNSConfig{}, "Domains"):                  false,
-		f(tailcfg.DNSConfig{}, "ExitNodeFilteredSet"):      false,
-		f(tailcfg.DNSConfig{}, "ExtraRecords"):             false,
-		f(tailcfg.DNSConfig{}, "FallbackResolvers"):        false,
-		f(tailcfg.DNSConfig{}, "Nameservers"):              false,
-		f(tailcfg.DNSConfig{}, "Proxied"):                  false,
-		f(tailcfg.DNSConfig{}, "Resolvers"):                false,
-		f(tailcfg.DNSConfig{}, "Routes"):                   false,
-		f(tailcfg.DNSConfig{}, "TempCorpIssue13969"):       false,
-		f(tailcfg.DNSRecord{}, "Name"):                     false,
-		f(tailcfg.DNSRecord{}, "Type"):                     false,
-		f(tailcfg.DNSRecord{}, "Value"):                    false,
-		f(tailcfg.DisplayMessageAction{}, "Label"):         false,
-		f(tailcfg.DisplayMessageAction{}, "URL"):           false,
-		f(tailcfg.DisplayMessage{}, "ImpactsConnectivity"): false,
-		f(tailcfg.DisplayMessage{}, "PrimaryAction"):       false,
-		f(tailcfg.DisplayMessage{}, "Severity"):            false,
-		f(tailcfg.DisplayMessage{}, "Text"):                false,
-		f(tailcfg.DisplayMessage{}, "Title"):               false,
-		f(tailcfg.FilterRule{}, "CapGrant"):                false,
-		f(tailcfg.FilterRule{}, "DstPorts"):                false,
-		f(tailcfg.FilterRule{}, "IPProto"):                 false,
-		f(tailcfg.FilterRule{}, "SrcBits"):                 false,
-		f(tailcfg.FilterRule{}, "SrcIPs"):                  false,
-		f(tailcfg.HostinfoView{}, "ж"):                     false,
-		f(tailcfg.Hostinfo{}, "AllowsUpdate"):              false,
-		f(tailcfg.Hostinfo{}, "App"):                       false,
-		f(tailcfg.Hostinfo{}, "AppConnector"):              false,
-		f(tailcfg.Hostinfo{}, "BackendLogID"):              false,
-		f(tailcfg.Hostinfo{}, "Cloud"):                     false,
-		f(tailcfg.Hostinfo{}, "Container"):                 false,
-		f(tailcfg.Hostinfo{}, "Desktop"):                   false,
-		f(tailcfg.Hostinfo{}, "DeviceModel"):               false,
-		f(tailcfg.Hostinfo{}, "Distro"):                    false,
-		f(tailcfg.Hostinfo{}, "DistroCodeName"):            false,
-		f(tailcfg.Hostinfo{}, "DistroVersion"):             false,
-		f(tailcfg.Hostinfo{}, "Env"):                       false,
-		f(tailcfg.Hostinfo{}, "ExitNodeID"):                false,
-		f(tailcfg.Hostinfo{}, "FrontendLogID"):             false,
-		f(tailcfg.Hostinfo{}, "GoArch"):                    false,
-		f(tailcfg.Hostinfo{}, "GoArchVar"):                 false,
-		f(tailcfg.Hostinfo{}, "GoVersion"):                 false,
-		f(tailcfg.Hostinfo{}, "Hostname"):                  false,
-		f(tailcfg.Hostinfo{}, "IPNVersion"):                false,
-		f(tailcfg.Hostinfo{}, "IngressEnabled"):            false,
-		f(tailcfg.Hostinfo{}, "Location"):                  false,
-		f(tailcfg.Hostinfo{}, "Machine"):                   false,
-		f(tailcfg.Hostinfo{}, "NetInfo"):                   false,
-		f(tailcfg.Hostinfo{}, "NoLogsNoSupport"):           false,
-		f(tailcfg.Hostinfo{}, "OS"):                        false,
-		f(tailcfg.Hostinfo{}, "OSVersion"):                 false,
-		f(tailcfg.Hostinfo{}, "Package"):                   false,
-		f(tailcfg.Hostinfo{}, "PushDeviceToken"):           false,
-		f(tailcfg.Hostinfo{}, "RequestTags"):               false,
-		f(tailcfg.Hostinfo{}, "RoutableIPs"):               false,
-		f(tailcfg.Hostinfo{}, "SSH_HostKeys"):              false,
-		f(tailcfg.Hostinfo{}, "Services"):                  false,
-		f(tailcfg.Hostinfo{}, "ServicesHash"):              false,
-		f(tailcfg.Hostinfo{}, "ShareeNode"):                false,
-		f(tailcfg.Hostinfo{}, "ShieldsUp"):                 false,
-		f(tailcfg.Hostinfo{}, "StateEncrypted"):            false,
-		f(tailcfg.Hostinfo{}, "TPM"):                       false,
-		f(tailcfg.Hostinfo{}, "Userspace"):                 false,
-		f(tailcfg.Hostinfo{}, "UserspaceRouter"):           false,
-		f(tailcfg.Hostinfo{}, "WireIngress"):               false,
-		f(tailcfg.Hostinfo{}, "WoLMACs"):                   false,
-		f(tailcfg.Location{}, "City"):                      false,
-		f(tailcfg.Location{}, "CityCode"):                  false,
-		f(tailcfg.Location{}, "Country"):                   false,
-		f(tailcfg.Location{}, "CountryCode"):               false,
-		f(tailcfg.Location{}, "Latitude"):                  false,
-		f(tailcfg.Location{}, "Longitude"):                 false,
-		f(tailcfg.Location{}, "Priority"):                  false,
-		f(tailcfg.NetInfo{}, "DERPLatency"):                false,
-		f(tailcfg.NetInfo{}, "FirewallMode"):               false,
-		f(tailcfg.NetInfo{}, "HavePortMap"):                false,
-		f(tailcfg.NetInfo{}, "LinkType"):                   false,
-		f(tailcfg.NetInfo{}, "MappingVariesByDestIP"):      false,
-		f(tailcfg.NetInfo{}, "OSHasIPv6"):                  false,
-		f(tailcfg.NetInfo{}, "PCP"):                        false,
-		f(tailcfg.NetInfo{}, "PMP"):                        false,
-		f(tailcfg.NetInfo{}, "PreferredDERP"):              false,
-		f(tailcfg.NetInfo{}, "UPnP"):                       false,
-		f(tailcfg.NetInfo{}, "WorkingICMPv4"):              false,
-		f(tailcfg.NetInfo{}, "WorkingIPv6"):                false,
-		f(tailcfg.NetInfo{}, "WorkingUDP"):                 false,
-		f(tailcfg.NetPortRange{}, "Bits"):                  false,
-		f(tailcfg.NetPortRange{}, "IP"):                    false,
-		f(tailcfg.NetPortRange{}, "Ports"):                 false,
-		f(tailcfg.NetPortRange{}, "_"):                     false,
-		f(tailcfg.NodeView{}, "ж"):                         false,
-		f(tailcfg.Node{}, "Addresses"):                     false,
-		f(tailcfg.Node{}, "AllowedIPs"):                    false,
-		f(tailcfg.Node{}, "Cap"):                           false,
-		f(tailcfg.Node{}, "CapMap"):                        false,
-		f(tailcfg.Node{}, "Capabilities"):                  false,
-		f(tailcfg.Node{}, "ComputedName"):                  false,
-		f(tailcfg.Node{}, "ComputedNameWithHost"):          false,
-		f(tailcfg.Node{}, "Created"):                       false,
-		f(tailcfg.Node{}, "DataPlaneAuditLogID"):           false,
-		f(tailcfg.Node{}, "DiscoKey"):                      false,
-		f(tailcfg.Node{}, "Endpoints"):                     false,
-		f(tailcfg.Node{}, "ExitNodeDNSResolvers"):          false,
-		f(tailcfg.Node{}, "Expired"):                       false,
-		f(tailcfg.Node{}, "HomeDERP"):                      false,
-		f(tailcfg.Node{}, "Hostinfo"):                      false,
-		f(tailcfg.Node{}, "ID"):                            false,
-		f(tailcfg.Node{}, "IsJailed"):                      false,
-		f(tailcfg.Node{}, "IsWireGuardOnly"):               false,
-		f(tailcfg.Node{}, "Key"):                           false,
-		f(tailcfg.Node{}, "KeyExpiry"):                     false,
-		f(tailcfg.Node{}, "KeySignature"):                  false,
-		f(tailcfg.Node{}, "LastSeen"):                      false,
-		f(tailcfg.Node{}, "LegacyDERPString"):              false,
-		f(tailcfg.Node{}, "Machine"):                       false,
-		f(tailcfg.Node{}, "MachineAuthorized"):             false,
-		f(tailcfg.Node{}, "Name"):                          false,
-		f(tailcfg.Node{}, "Online"):                        false,
-		f(tailcfg.Node{}, "PrimaryRoutes"):                 false,
-		f(tailcfg.Node{}, "SelfNodeV4MasqAddrForThisPeer"): false,
-		f(tailcfg.Node{}, "SelfNodeV6MasqAddrForThisPeer"): false,
-		f(tailcfg.Node{}, "Sharer"):                        false,
-		f(tailcfg.Node{}, "StableID"):                      false,
-		f(tailcfg.Node{}, "Tags"):                          false,
-		f(tailcfg.Node{}, "UnsignedPeerAPIOnly"):           false,
-		f(tailcfg.Node{}, "User"):                          false,
-		f(tailcfg.Node{}, "computedHostIfDifferent"):       false,
-		f(tailcfg.PortRange{}, "First"):                    false,
-		f(tailcfg.PortRange{}, "Last"):                     false,
-		f(tailcfg.SSHPolicy{}, "Rules"):                    false,
-		f(tailcfg.Service{}, "Description"):                false,
-		f(tailcfg.Service{}, "Port"):                       false,
-		f(tailcfg.Service{}, "Proto"):                      false,
-		f(tailcfg.Service{}, "_"):                          false,
-		f(tailcfg.TPMInfo{}, "FamilyIndicator"):            false,
-		f(tailcfg.TPMInfo{}, "FirmwareVersion"):            false,
-		f(tailcfg.TPMInfo{}, "Manufacturer"):               false,
-		f(tailcfg.TPMInfo{}, "Model"):                      false,
-		f(tailcfg.TPMInfo{}, "SpecRevision"):               false,
-		f(tailcfg.TPMInfo{}, "Vendor"):                     false,
-		f(tailcfg.UserProfileView{}, "ж"):                  false,
-		f(tailcfg.UserProfile{}, "DisplayName"):            false,
-		f(tailcfg.UserProfile{}, "ID"):                     false,
-		f(tailcfg.UserProfile{}, "LoginName"):              false,
-		f(tailcfg.UserProfile{}, "ProfilePicURL"):          false,
-		f(views.Slice[ipproto.Proto]{}, "ж"):               false,
-		f(views.Slice[tailcfg.FilterRule]{}, "ж"):          false,
-	}
-
-	t.Run("field_list_is_complete", func(t *testing.T) {
-		seen := set.Set[field]{}
-		eachStructField(reflect.TypeOf(netmap.NetworkMap{}), func(rt reflect.Type, sf reflect.StructField) {
-			f := field{rt, sf.Name}
-			seen.Add(f)
-			if _, ok := fields[f]; !ok {
-				// Fail the test if netmap has a field not in the list. If you see this test
-				// failure, please add the new field to the fields map above, marking it as private or public.
-				t.Errorf("netmap field has not been declared as private or public: %v.%v", rt, sf.Name)
-			}
-		})
-
-		for want := range fields {
-			if !seen.Contains(want) {
-				// Fail the test if the list has a field not in netmap. If you see this test
-				// failure, please remove the field from the fields map above.
-				t.Errorf("field declared that has not been found in netmap: %v.%v", want.t, want.f)
-			}
-		}
-	})
-
-	// tests is a list of test cases, each with a non-redacted netmap and the expected redacted netmap.
-	// If you add a new private field to netmap.NetworkMap or its sub-structs, please add a test case
-	// here that has that field set in nm, and the expected redacted value in wantRedacted.
-	tests := []struct {
-		name         string
-		nm           *netmap.NetworkMap
-		wantRedacted *netmap.NetworkMap
-	}{
-		{
-			name: "redact_private_key",
-			nm: &netmap.NetworkMap{
-				PrivateKey: key.NewNode(),
-			},
-			wantRedacted: &netmap.NetworkMap{},
-		},
-	}
-
-	// confirmedRedacted is a set of all private fields that have been covered by the tests above.
-	confirmedRedacted := set.Set[field]{}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-
-			// Record which of the private fields are set in the non-redacted netmap.
-			eachStructValue(reflect.ValueOf(tt.nm).Elem(), func(tt reflect.Type, sf reflect.StructField, v reflect.Value) {
-				f := field{tt, sf.Name}
-				if shouldRedact := fields[f]; shouldRedact && !v.IsZero() {
-					confirmedRedacted.Add(f)
-				}
-			})
-
-			got, _ := redactNetmapPrivateKeys(tt.nm)
-			if !reflect.DeepEqual(got, tt.wantRedacted) {
-				t.Errorf("unexpected redacted netmap: %+v", got)
-			}
-
-			// Check that all private fields in the redacted netmap are zero.
-			eachStructValue(reflect.ValueOf(got).Elem(), func(tt reflect.Type, sf reflect.StructField, v reflect.Value) {
-				f := field{tt, sf.Name}
-				if shouldRedact := fields[f]; shouldRedact && !v.IsZero() {
-					t.Errorf("field not redacted: %v.%v", tt, sf.Name)
-				}
-			})
-		})
-	}
-
-	// Check that all private fields in netmap.NetworkMap and its sub-structs
-	// are covered by the tests above. If you see a test failure here,
-	// please add a test case above that has that field set in nm.
-	for f, shouldRedact := range fields {
-		if shouldRedact {
-			if !confirmedRedacted.Contains(f) {
-				t.Errorf("field not covered by tests: %v.%v", f.t, f.f)
-			}
-		}
-	}
-}
-
 func TestHandleC2NDebugNetmap(t *testing.T) {
 	nm := &netmap.NetworkMap{
 		Name: "myhost",
@@ -495,10 +159,7 @@ func TestHandleC2NDebugNetmap(t *testing.T) {
 				Hostinfo: (&tailcfg.Hostinfo{Hostname: "peer1"}).View(),
 			}).View(),
 		},
-		PrivateKey: key.NewNode(),
 	}
-	withoutPrivateKey := *nm
-	withoutPrivateKey.PrivateKey = key.NodePrivate{}
 
 	for _, tt := range []struct {
 		name string
@@ -507,12 +168,12 @@ func TestHandleC2NDebugNetmap(t *testing.T) {
 	}{
 		{
 			name: "simple_get",
-			want: &withoutPrivateKey,
+			want: nm,
 		},
 		{
 			name: "post_no_omit",
 			req:  &tailcfg.C2NDebugNetmapRequest{},
-			want: &withoutPrivateKey,
+			want: nm,
 		},
 		{
 			name: "post_omit_peers_and_name",
@@ -524,7 +185,7 @@ func TestHandleC2NDebugNetmap(t *testing.T) {
 		{
 			name: "post_omit_nonexistent_field",
 			req:  &tailcfg.C2NDebugNetmapRequest{OmitFields: []string{"ThisFieldDoesNotExist"}},
-			want: &withoutPrivateKey,
+			want: nm,
 		},
 	} {
 		t.Run(tt.name, func(t *testing.T) {

ipn/ipnlocal/local.go

@@ -3052,9 +3052,6 @@ func (b *LocalBackend) WatchNotifications(ctx context.Context, mask ipn.NotifyWa
 func (b *LocalBackend) WatchNotificationsAs(ctx context.Context, actor ipnauth.Actor, mask ipn.NotifyWatchOpt, onWatchAdded func(), fn func(roNotify *ipn.Notify) (keepGoing bool)) {
 	ch := make(chan *ipn.Notify, 128)
 	sessionID := rands.HexString(16)
-	if mask&ipn.NotifyNoPrivateKeys != 0 {
-		fn = filterPrivateKeys(fn)
-	}
 	if mask&ipn.NotifyHealthActions == 0 {
 		// if UI does not support PrimaryAction in health warnings, append
 		// action URLs to the warning text instead.
@@ -3154,39 +3151,6 @@ func (b *LocalBackend) WatchNotificationsAs(ctx context.Context, actor ipnauth.A
 	sender.Run(ctx, ch)
 }
 
-// filterPrivateKeys returns an IPN listener func that wraps the supplied IPN
-// listener and zeroes out the PrivateKey in the NetMap passed to the wrapped
-// listener.
-func filterPrivateKeys(fn func(roNotify *ipn.Notify) (keepGoing bool)) func(*ipn.Notify) bool {
-	return func(n *ipn.Notify) bool {
-		redacted, changed := redactNetmapPrivateKeys(n.NetMap)
-		if !changed {
-			return fn(n)
-		}
-
-		// The netmap in n is shared across all watchers, so to mutate it for a
-		// single watcher we have to clone the notify and the netmap. We can
-		// make shallow clones, at least.
-		n2 := *n
-		n2.NetMap = redacted
-		return fn(&n2)
-	}
-}
-
-// redactNetmapPrivateKeys returns a copy of nm with private keys zeroed out.
-// If no change was needed, it returns nm unmodified.
-func redactNetmapPrivateKeys(nm *netmap.NetworkMap) (redacted *netmap.NetworkMap, changed bool) {
-	if nm == nil || nm.PrivateKey.IsZero() {
-		return nm, false
-	}
-
-	// The netmap might be shared across watchers, so make at least a shallow
-	// clone before mutating it.
-	nm2 := *nm
-	nm2.PrivateKey = key.NodePrivate{}
-	return &nm2, true
-}
-
 // appendHealthActions returns an IPN listener func that wraps the supplied IPN
 // listener func and transforms health messages passed to the wrapped listener.
 // If health messages with PrimaryActions are present, it appends the label &
@@ -5087,7 +5051,12 @@ func (b *LocalBackend) authReconfigLocked() {
 		}
 	}
 
-	cfg, err := nmcfg.WGCfg(nm, b.logf, flags, prefs.ExitNodeID())
+	priv := b.pm.CurrentPrefs().Persist().PrivateNodeKey()
+	if !priv.IsZero() && priv.Public() != nm.NodeKey {
+		priv = key.NodePrivate{}
+	}
+
+	cfg, err := nmcfg.WGCfg(priv, nm, b.logf, flags, prefs.ExitNodeID())
 	if err != nil {
 		b.logf("wgcfg: %v", err)
 		return

ipn/ipnlocal/local_test.go

@@ -20,6 +20,7 @@ import (
 	"slices"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"testing"
 	"time"
 
@@ -49,6 +50,7 @@ import (
 	"tailscale.com/tsd"
 	"tailscale.com/tstest"
 	"tailscale.com/tstest/deptest"
+	"tailscale.com/tstest/typewalk"
 	"tailscale.com/types/appctype"
 	"tailscale.com/types/dnstype"
 	"tailscale.com/types/ipproto"
@@ -57,6 +59,7 @@ import (
 	"tailscale.com/types/logid"
 	"tailscale.com/types/netmap"
 	"tailscale.com/types/opt"
+	"tailscale.com/types/persist"
 	"tailscale.com/types/ptr"
 	"tailscale.com/types/views"
 	"tailscale.com/util/dnsname"
@@ -7112,3 +7115,104 @@ func eqUpdate(want appctype.RouteUpdate) func(appctype.RouteUpdate) error {
 		return nil
 	}
 }
+
+type fakeAttestationKey struct{ key.HardwareAttestationKey }
+
+func (f *fakeAttestationKey) Clone() key.HardwareAttestationKey {
+	return &fakeAttestationKey{}
+}
+
+// TestStripKeysFromPrefs tests that LocalBackend's [stripKeysFromPrefs] (as used
+// by sendNotify etc) correctly removes all private keys from an ipn.Notify.
+//
+// It does so by testing the the two ways that Notifys are sent: via sendNotify,
+// and via extension hooks.
+func TestStripKeysFromPrefs(t *testing.T) {
+	// genNotify generates a sample ipn.Notify with various private keys set
+	// at a certain path through the Notify data structure.
+	genNotify := map[string]func() ipn.Notify{
+		"Notify.Prefs.ж.Persist.PrivateNodeKey": func() ipn.Notify {
+			return ipn.Notify{
+				Prefs: ptr.To((&ipn.Prefs{
+					Persist: &persist.Persist{PrivateNodeKey: key.NewNode()},
+				}).View()),
+			}
+		},
+		"Notify.Prefs.ж.Persist.OldPrivateNodeKey": func() ipn.Notify {
+			return ipn.Notify{
+				Prefs: ptr.To((&ipn.Prefs{
+					Persist: &persist.Persist{OldPrivateNodeKey: key.NewNode()},
+				}).View()),
+			}
+		},
+		"Notify.Prefs.ж.Persist.NetworkLockKey": func() ipn.Notify {
+			return ipn.Notify{
+				Prefs: ptr.To((&ipn.Prefs{
+					Persist: &persist.Persist{NetworkLockKey: key.NewNLPrivate()},
+				}).View()),
+			}
+		},
+		"Notify.Prefs.ж.Persist.AttestationKey": func() ipn.Notify {
+			return ipn.Notify{
+				Prefs: ptr.To((&ipn.Prefs{
+					Persist: &persist.Persist{AttestationKey: new(fakeAttestationKey)},
+				}).View()),
+			}
+		},
+	}
+
+	private := key.PrivateTypesForTest()
+
+	for path := range typewalk.MatchingPaths(reflect.TypeFor[ipn.Notify](), private.Contains) {
+		t.Run(path.Name, func(t *testing.T) {
+			gen, ok := genNotify[path.Name]
+			if !ok {
+				t.Fatalf("no genNotify function for path %q", path.Name)
+			}
+			withKey := gen()
+
+			if path.Walk(reflect.ValueOf(withKey)).IsZero() {
+				t.Fatalf("generated notify does not have non-zero value at path %q", path.Name)
+			}
+
+			h := &ExtensionHost{}
+			ch := make(chan *ipn.Notify, 1)
+			b := &LocalBackend{
+				extHost: h,
+				notifyWatchers: map[string]*watchSession{
+					"test": {ch: ch},
+				},
+			}
+
+			var okay atomic.Int32
+			testNotify := func(via string) func(*ipn.Notify) {
+				return func(n *ipn.Notify) {
+					if n == nil {
+						t.Errorf("notify from %s is nil", via)
+						return
+					}
+					if !path.Walk(reflect.ValueOf(*n)).IsZero() {
+						t.Errorf("notify from %s has non-zero value at path %q; key not stripped", via, path.Name)
+					} else {
+						okay.Add(1)
+					}
+				}
+			}
+
+			h.Hooks().MutateNotifyLocked.Add(testNotify("MutateNotifyLocked hook"))
+
+			b.send(withKey)
+
+			select {
+			case n := <-ch:
+				testNotify("watchSession")(n)
+			default:
+				t.Errorf("no notify sent to watcher channel")
+			}
+
+			if got := okay.Load(); got != 2 {
+				t.Errorf("notify passed validation %d times; want 2", got)
+			}
+		})
+	}
+}

ipn/ipnlocal/profiles.go

@@ -24,6 +24,7 @@ import (
 	"tailscale.com/types/persist"
 	"tailscale.com/util/clientmetric"
 	"tailscale.com/util/eventbus"
+	"tailscale.com/util/testenv"
 )
 
 var debug = envknob.RegisterBool("TS_DEBUG_PROFILES")
@@ -849,6 +850,7 @@ func (pm *profileManager) CurrentPrefs() ipn.PrefsView {
 
 // ReadStartupPrefsForTest reads the startup prefs from disk. It is only used for testing.
 func ReadStartupPrefsForTest(logf logger.Logf, store ipn.StateStore) (ipn.PrefsView, error) {
+	testenv.AssertInTest()
 	bus := eventbus.New()
 	defer bus.Close()
 	ht := health.NewTracker(bus) // in tests, don't care about the health status

ipn/localapi/localapi.go

@@ -877,14 +877,6 @@ func (h *Handler) serveWatchIPNBus(w http.ResponseWriter, r *http.Request) {
 		}
 		mask = ipn.NotifyWatchOpt(v)
 	}
-	// Users with only read access must request private key filtering. If they
-	// don't filter out private keys, require write access.
-	if (mask & ipn.NotifyNoPrivateKeys) == 0 {
-		if !h.PermitWrite {
-			http.Error(w, "watch IPN bus access denied, must set ipn.NotifyNoPrivateKeys when not running as admin/root or operator", http.StatusForbidden)
-			return
-		}
-	}
 
 	w.Header().Set("Content-Type", "application/json")
 	ctx := r.Context()

ipn/localapi/localapi_test.go

@@ -263,13 +263,17 @@ func TestShouldDenyServeConfigForGOOSAndUserContext(t *testing.T) {
 	})
 }
 
+// TestServeWatchIPNBus used to test that various WatchIPNBus mask flags
+// changed the permissions required to access the endpoint.
+// However, since the removal of the NotifyNoPrivateKeys flag requirement
+// for read-only users, this test now only verifies that the endpoint
+// behaves correctly based on the PermitRead and PermitWrite settings.
 func TestServeWatchIPNBus(t *testing.T) {
 	tstest.Replace(t, &validLocalHostForTesting, true)
 
 	tests := []struct {
 		desc                    string
 		permitRead, permitWrite bool
-		mask                    ipn.NotifyWatchOpt // extra bits in addition to ipn.NotifyInitialState
 		wantStatus              int
 	}{
 		{
@@ -279,20 +283,13 @@ func TestServeWatchIPNBus(t *testing.T) {
 			wantStatus:  http.StatusForbidden,
 		},
 		{
-			desc:        "read-initial-state",
+			desc:        "read-only",
 			permitRead:  true,
 			permitWrite: false,
-			wantStatus:  http.StatusForbidden,
-		},
-		{
-			desc:        "read-initial-state-no-private-keys",
-			permitRead:  true,
-			permitWrite: false,
-			mask:        ipn.NotifyNoPrivateKeys,
 			wantStatus:  http.StatusOK,
 		},
 		{
-			desc:        "read-initial-state-with-private-keys",
+			desc:        "read-and-write",
 			permitRead:  true,
 			permitWrite: true,
 			wantStatus:  http.StatusOK,
@@ -311,7 +308,7 @@ func TestServeWatchIPNBus(t *testing.T) {
 			c := s.Client()
 
 			ctx, cancel := context.WithCancel(context.Background())
-			req, err := http.NewRequestWithContext(ctx, "GET", fmt.Sprintf("%s/localapi/v0/watch-ipn-bus?mask=%d", s.URL, ipn.NotifyInitialState|tt.mask), nil)
+			req, err := http.NewRequestWithContext(ctx, "GET", fmt.Sprintf("%s/localapi/v0/watch-ipn-bus?mask=%d", s.URL, ipn.NotifyInitialState), nil)
 			if err != nil {
 				t.Fatal(err)
 			}

tsconsensus/monitor.go

@@ -102,15 +102,13 @@ func (m *monitor) handleSummaryStatus(w http.ResponseWriter, r *http.Request) {
 }
 
 func (m *monitor) handleNetmap(w http.ResponseWriter, r *http.Request) {
-	var mask ipn.NotifyWatchOpt = ipn.NotifyInitialNetMap
-	mask |= ipn.NotifyNoPrivateKeys
 	lc, err := m.ts.LocalClient()
 	if err != nil {
 		log.Printf("monitor: error LocalClient: %v", err)
 		http.Error(w, "", http.StatusInternalServerError)
 		return
 	}
-	watcher, err := lc.WatchIPNBus(r.Context(), mask)
+	watcher, err := lc.WatchIPNBus(r.Context(), ipn.NotifyInitialNetMap)
 	if err != nil {
 		log.Printf("monitor: error WatchIPNBus: %v", err)
 		http.Error(w, "", http.StatusInternalServerError)

tsnet/tsnet.go

@@ -350,7 +350,7 @@ func (s *Server) Up(ctx context.Context) (*ipnstate.Status, error) {
 		return nil, fmt.Errorf("tsnet.Up: %w", err)
 	}
 
-	watcher, err := lc.WatchIPNBus(ctx, ipn.NotifyInitialState|ipn.NotifyNoPrivateKeys)
+	watcher, err := lc.WatchIPNBus(ctx, ipn.NotifyInitialState)
 	if err != nil {
 		return nil, fmt.Errorf("tsnet.Up: %w", err)
 	}

tstest/integration/integration_test.go

@@ -2128,16 +2128,10 @@ func TestC2NDebugNetmap(t *testing.T) {
 		var current netmap.NetworkMap
 		must.Do(json.Unmarshal(resp.Current, &current))
 
-		if !current.PrivateKey.IsZero() {
-			t.Errorf("current netmap has non-zero private key: %v", current.PrivateKey)
-		}
 		// Check candidate netmap if we sent a map response.
 		if cand != nil {
 			var candidate netmap.NetworkMap
 			must.Do(json.Unmarshal(resp.Candidate, &candidate))
-			if !candidate.PrivateKey.IsZero() {
-				t.Errorf("candidate netmap has non-zero private key: %v", candidate.PrivateKey)
-			}
 			if diff := cmp.Diff(current.SelfNode, candidate.SelfNode); diff != "" {
 				t.Errorf("SelfNode differs (-current +candidate):\n%s", diff)
 			}

tstest/typewalk/typewalk.go

@@ -0,0 +1,106 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package typewalk provides utilities to walk Go types using reflection.
+package typewalk
+
+import (
+	"iter"
+	"reflect"
+	"strings"
+)
+
+// Path describes a path via a type where a private key may be found,
+// along with a function to test whether a reflect.Value at that path is
+// non-zero.
+type Path struct {
+	// Name is the path from the root type, suitable for using as a t.Run name.
+	Name string
+
+	// Walk returns the reflect.Value at the end of the path, given a root
+	// reflect.Value.
+	Walk func(root reflect.Value) (leaf reflect.Value)
+}
+
+// MatchingPaths returns a sequence of [Path] for all paths
+// within the given type that end in a type matching match.
+func MatchingPaths(rt reflect.Type, match func(reflect.Type) bool) iter.Seq[Path] {
+	// valFromRoot is a function that, given a reflect.Value of the root struct,
+	// returns the reflect.Value at some path within it.
+	type valFromRoot func(reflect.Value) reflect.Value
+
+	return func(yield func(Path) bool) {
+		var walk func(reflect.Type, valFromRoot)
+		var path []string
+		var done bool
+		seen := map[reflect.Type]bool{}
+
+		walk = func(t reflect.Type, getV valFromRoot) {
+			if seen[t] {
+				return
+			}
+			seen[t] = true
+			defer func() { seen[t] = false }()
+			if done {
+				return
+			}
+			if match(t) {
+				if !yield(Path{
+					Name: strings.Join(path, "."),
+					Walk: getV,
+				}) {
+					done = true
+				}
+				return
+			}
+			switch t.Kind() {
+			case reflect.Ptr, reflect.Slice, reflect.Array:
+				walk(t.Elem(), func(root reflect.Value) reflect.Value {
+					v := getV(root)
+					return v.Elem()
+				})
+			case reflect.Struct:
+				for i := range t.NumField() {
+					sf := t.Field(i)
+					fieldName := sf.Name
+					if fieldName == "_" {
+						continue
+					}
+					path = append(path, fieldName)
+					walk(sf.Type, func(root reflect.Value) reflect.Value {
+						return getV(root).FieldByName(fieldName)
+					})
+					path = path[:len(path)-1]
+					if done {
+						return
+					}
+				}
+			case reflect.Map:
+				walk(t.Elem(), func(root reflect.Value) reflect.Value {
+					v := getV(root)
+					if v.Len() == 0 {
+						return reflect.Zero(t.Elem())
+					}
+					iter := v.MapRange()
+					iter.Next()
+					return iter.Value()
+				})
+				if done {
+					return
+				}
+				walk(t.Key(), func(root reflect.Value) reflect.Value {
+					v := getV(root)
+					if v.Len() == 0 {
+						return reflect.Zero(t.Key())
+					}
+					iter := v.MapRange()
+					iter.Next()
+					return iter.Key()
+				})
+			}
+		}
+
+		path = append(path, rt.Name())
+		walk(rt, func(v reflect.Value) reflect.Value { return v })
+	}
+}

types/key/util.go

@@ -10,9 +10,12 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"reflect"
 	"slices"
 
 	"go4.org/mem"
+	"tailscale.com/util/set"
+	"tailscale.com/util/testenv"
 )
 
 // rand fills b with cryptographically strong random bytes. Panics if
@@ -115,3 +118,18 @@ func debug32(k [32]byte) string {
 	dst[6] = ']'
 	return string(dst[:7])
 }
+
+// PrivateTypesForTest returns the set of private key types
+// in this package, for testing purposes.
+func PrivateTypesForTest() set.Set[reflect.Type] {
+	testenv.AssertInTest()
+	return set.Of(
+		reflect.TypeFor[ChallengePrivate](),
+		reflect.TypeFor[ControlPrivate](),
+		reflect.TypeFor[DiscoPrivate](),
+		reflect.TypeFor[MachinePrivate](),
+		reflect.TypeFor[NodePrivate](),
+		reflect.TypeFor[NLPrivate](),
+		reflect.TypeFor[HardwareAttestationKey](),
+	)
+}

types/netmap/netmap.go

@@ -26,11 +26,10 @@ import (
 // The fields should all be considered read-only. They might
 // alias parts of previous NetworkMap values.
 type NetworkMap struct {
-	SelfNode   tailcfg.NodeView
-	AllCaps    set.Set[tailcfg.NodeCapability] // set version of SelfNode.Capabilities + SelfNode.CapMap
-	NodeKey    key.NodePublic
-	PrivateKey key.NodePrivate
-	Expiry     time.Time
+	SelfNode tailcfg.NodeView
+	AllCaps  set.Set[tailcfg.NodeCapability] // set version of SelfNode.Capabilities + SelfNode.CapMap
+	NodeKey  key.NodePublic
+	Expiry   time.Time
 	// Name is the DNS name assigned to this node.
 	// It is the MapResponse.Node.Name value and ends with a period.
 	Name string

types/netmap/netmap_test.go

@@ -6,11 +6,13 @@ package netmap
 import (
 	"encoding/hex"
 	"net/netip"
+	"reflect"
 	"testing"
 
 	"go4.org/mem"
 	"tailscale.com/net/netaddr"
 	"tailscale.com/tailcfg"
+	"tailscale.com/tstest/typewalk"
 	"tailscale.com/types/key"
 )
 
@@ -316,3 +318,10 @@ func TestPeerIndexByNodeID(t *testing.T) {
 		}
 	}
 }
+
+func TestNoPrivateKeyMaterial(t *testing.T) {
+	private := key.PrivateTypesForTest()
+	for path := range typewalk.MatchingPaths(reflect.TypeFor[NetworkMap](), private.Contains) {
+		t.Errorf("NetworkMap contains private key material at path: %q", path.Name)
+	}
+}

wgengine/bench/wg.go

@@ -111,9 +111,8 @@ func setupWGTest(b *testing.B, logf logger.Logf, traf *TrafficGen, a1, a2 netip.
 			Endpoints:  epFromTyped(st.LocalAddrs),
 		}
 		e2.SetNetworkMap(&netmap.NetworkMap{
-			NodeKey:    k2.Public(),
-			PrivateKey: k2,
-			Peers:      []tailcfg.NodeView{n.View()},
+			NodeKey: k2.Public(),
+			Peers:   []tailcfg.NodeView{n.View()},
 		})
 
 		p := wgcfg.Peer{
@@ -143,9 +142,8 @@ func setupWGTest(b *testing.B, logf logger.Logf, traf *TrafficGen, a1, a2 netip.
 			Endpoints:  epFromTyped(st.LocalAddrs),
 		}
 		e1.SetNetworkMap(&netmap.NetworkMap{
-			NodeKey:    k1.Public(),
-			PrivateKey: k1,
-			Peers:      []tailcfg.NodeView{n.View()},
+			NodeKey: k1.Public(),
+			Peers:   []tailcfg.NodeView{n.View()},
 		})
 
 		p := wgcfg.Peer{

wgengine/magicsock/magicsock_test.go

@@ -308,8 +308,7 @@ func meshStacks(logf logger.Logf, mutateNetmap func(idx int, nm *netmap.NetworkM
 	buildNetmapLocked := func(myIdx int) *netmap.NetworkMap {
 		me := ms[myIdx]
 		nm := &netmap.NetworkMap{
-			PrivateKey: me.privateKey,
-			NodeKey:    me.privateKey.Public(),
+			NodeKey: me.privateKey.Public(),
 			SelfNode: (&tailcfg.Node{
 				Addresses: []netip.Prefix{netip.PrefixFrom(netaddr.IPv4(1, 0, 0, byte(myIdx+1)), 32)},
 			}).View(),
@@ -356,7 +355,7 @@ func meshStacks(logf logger.Logf, mutateNetmap func(idx int, nm *netmap.NetworkM
 				peerSet.Add(peer.Key())
 			}
 			m.conn.UpdatePeers(peerSet)
-			wg, err := nmcfg.WGCfg(nm, logf, 0, "")
+			wg, err := nmcfg.WGCfg(ms[i].privateKey, nm, logf, 0, "")
 			if err != nil {
 				// We're too far from the *testing.T to be graceful,
 				// blow up. Shouldn't happen anyway.
@@ -2201,9 +2200,8 @@ func TestIsWireGuardOnlyPeer(t *testing.T) {
 	defer m.Close()
 
 	nm := &netmap.NetworkMap{
-		Name:       "ts",
-		PrivateKey: m.privateKey,
-		NodeKey:    m.privateKey.Public(),
+		Name:    "ts",
+		NodeKey: m.privateKey.Public(),
 		SelfNode: (&tailcfg.Node{
 			Addresses: []netip.Prefix{tsaip},
 		}).View(),
@@ -2224,7 +2222,7 @@ func TestIsWireGuardOnlyPeer(t *testing.T) {
 	}
 	m.conn.onNodeViewsUpdate(nv)
 
-	cfg, err := nmcfg.WGCfg(nm, t.Logf, netmap.AllowSubnetRoutes, "")
+	cfg, err := nmcfg.WGCfg(m.privateKey, nm, t.Logf, netmap.AllowSubnetRoutes, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -2266,9 +2264,8 @@ func TestIsWireGuardOnlyPeerWithMasquerade(t *testing.T) {
 	defer m.Close()
 
 	nm := &netmap.NetworkMap{
-		Name:       "ts",
-		PrivateKey: m.privateKey,
-		NodeKey:    m.privateKey.Public(),
+		Name:    "ts",
+		NodeKey: m.privateKey.Public(),
 		SelfNode: (&tailcfg.Node{
 			Addresses: []netip.Prefix{tsaip},
 		}).View(),
@@ -2290,7 +2287,7 @@ func TestIsWireGuardOnlyPeerWithMasquerade(t *testing.T) {
 	}
 	m.conn.onNodeViewsUpdate(nv)
 
-	cfg, err := nmcfg.WGCfg(nm, t.Logf, netmap.AllowSubnetRoutes, "")
+	cfg, err := nmcfg.WGCfg(m.privateKey, nm, t.Logf, netmap.AllowSubnetRoutes, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -2334,7 +2331,7 @@ func applyNetworkMap(t *testing.T, m *magicStack, nm *netmap.NetworkMap) {
 	m.conn.noV6.Store(true)
 
 	// Turn the network map into a wireguard config (for the tailscale internal wireguard device).
-	cfg, err := nmcfg.WGCfg(nm, t.Logf, netmap.AllowSubnetRoutes, "")
+	cfg, err := nmcfg.WGCfg(m.privateKey, nm, t.Logf, netmap.AllowSubnetRoutes, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -2403,9 +2400,8 @@ func TestIsWireGuardOnlyPickEndpointByPing(t *testing.T) {
 	wgEpV6 := netip.MustParseAddrPort(v6.LocalAddr().String())
 
 	nm := &netmap.NetworkMap{
-		Name:       "ts",
-		PrivateKey: m.privateKey,
-		NodeKey:    m.privateKey.Public(),
+		Name:    "ts",
+		NodeKey: m.privateKey.Public(),
 		SelfNode: (&tailcfg.Node{
 			Addresses: []netip.Prefix{tsaip},
 		}).View(),

wgengine/wgcfg/nmcfg/nmcfg.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 
 	"tailscale.com/tailcfg"
+	"tailscale.com/types/key"
 	"tailscale.com/types/logger"
 	"tailscale.com/types/logid"
 	"tailscale.com/types/netmap"
@@ -41,9 +42,9 @@ func cidrIsSubnet(node tailcfg.NodeView, cidr netip.Prefix) bool {
 }
 
 // WGCfg returns the NetworkMaps's WireGuard configuration.
-func WGCfg(nm *netmap.NetworkMap, logf logger.Logf, flags netmap.WGConfigFlags, exitNode tailcfg.StableNodeID) (*wgcfg.Config, error) {
+func WGCfg(pk key.NodePrivate, nm *netmap.NetworkMap, logf logger.Logf, flags netmap.WGConfigFlags, exitNode tailcfg.StableNodeID) (*wgcfg.Config, error) {
 	cfg := &wgcfg.Config{
-		PrivateKey: nm.PrivateKey,
+		PrivateKey: pk,
 		Addresses:  nm.GetAddresses().AsSlice(),
 		Peers:      make([]wgcfg.Peer, 0, len(nm.Peers)),
 	}