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client/web: only check policy caps for tagged nodes

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For user-owned nodes, only the owner is ever allowed to manage the
node.

Updates tailscale/corp#16695

Signed-off-by: Sonia Appasamy <sonia@tailscale.com>
This commit is contained in:
Sonia Appasamy 2024-02-09 17:51:05 -05:00 committed by Sonia Appasamy
parent 6f6383f69e
commit 2bb837a9cf
3 changed files with 61 additions and 12 deletions
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17
client/web/auth.go
View File

@ -269,11 +269,22 @@ type capRule struct {
// toPeerCapabilities parses out the web ui capabilities from the
// given whois response.
func toPeerCapabilities(whois *apitype.WhoIsResponse) (peerCapabilities, error) {
caps := peerCapabilities{}
func toPeerCapabilities(status *ipnstate.Status, whois *apitype.WhoIsResponse) (peerCapabilities, error) {
if whois == nil {
return caps, nil
return peerCapabilities{}, nil
}
if !status.Self.IsTagged() {
// User owned nodes are only ever manageable by the owner.
if status.Self.UserID != whois.UserProfile.ID {
return peerCapabilities{}, nil
} else {
return peerCapabilities{capFeatureAll: true}, nil // owner can edit all features
}
}
// For tagged nodes, we actually look at the granted capabilities.
caps := peerCapabilities{}
rules, err := tailcfg.UnmarshalCapJSON[capRule](whois.CapMap, tailcfg.PeerCapabilityWebUI)
if err != nil {
return nil, fmt.Errorf("failed to unmarshal capability: %v", err)

2
client/web/web.go
View File

@ -477,7 +477,7 @@ func (s *Server) serveAPIAuth(w http.ResponseWriter, r *http.Request) {
session, whois, status, sErr := s.getSession(r)
if whois != nil {
caps, err := toPeerCapabilities(whois)
caps, err := toPeerCapabilities(status, whois)
if err != nil {
http.Error(w, sErr.Error(), http.StatusInternalServerError)
return

54
client/web/web_test.go
View File

@ -450,7 +450,7 @@ func TestServeAuth(t *testing.T) {
NodeName: remoteNode.Node.Name,
NodeIP: remoteIP,
ProfilePicURL: user.ProfilePicURL,
Capabilities: peerCapabilities{},
Capabilities: peerCapabilities{capFeatureAll: true},
}
testControlURL := &defaultControlURL
@ -1099,19 +1099,52 @@ func TestRequireTailscaleIP(t *testing.T) {
}
func TestPeerCapabilities(t *testing.T) {
userOwnedStatus := &ipnstate.Status{Self: &ipnstate.PeerStatus{UserID: tailcfg.UserID(1)}}
tags := views.SliceOf[string]([]string{"tag:server"})
tagOwnedStatus := &ipnstate.Status{Self: &ipnstate.PeerStatus{Tags: &tags}}
// Testing web.toPeerCapabilities
toPeerCapsTests := []struct {
name string
status *ipnstate.Status
whois *apitype.WhoIsResponse
wantCaps peerCapabilities
}{
{
name: "empty-whois",
status: userOwnedStatus,
whois: nil,
wantCaps: peerCapabilities{},
},
{
name: "no-webui-caps",
name: "user-owned-node-non-owner-caps-ignored",
status: userOwnedStatus,
whois: &apitype.WhoIsResponse{
UserProfile: &tailcfg.UserProfile{ID: tailcfg.UserID(2)},
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityWebUI: []tailcfg.RawMessage{
"{\"canEdit\":[\"ssh\",\"subnet\"]}",
},
},
},
wantCaps: peerCapabilities{},
},
{
name: "user-owned-node-owner-caps-ignored",
status: userOwnedStatus,
whois: &apitype.WhoIsResponse{
UserProfile: &tailcfg.UserProfile{ID: tailcfg.UserID(1)},
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityWebUI: []tailcfg.RawMessage{
"{\"canEdit\":[\"ssh\",\"subnet\"]}",
},
},
},
wantCaps: peerCapabilities{capFeatureAll: true}, // should just have wildcard
},
{
name: "tag-owned-no-webui-caps",
status: tagOwnedStatus,
whois: &apitype.WhoIsResponse{
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityDebugPeer: []tailcfg.RawMessage{},
@ -1120,7 +1153,8 @@ func TestPeerCapabilities(t *testing.T) {
wantCaps: peerCapabilities{},
},
{
name: "one-webui-cap",
name: "tag-owned-one-webui-cap",
status: tagOwnedStatus,
whois: &apitype.WhoIsResponse{
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityWebUI: []tailcfg.RawMessage{
@ -1134,7 +1168,8 @@ func TestPeerCapabilities(t *testing.T) {
},
},
{
name: "multiple-webui-cap",
name: "tag-owned-multiple-webui-cap",
status: tagOwnedStatus,
whois: &apitype.WhoIsResponse{
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityWebUI: []tailcfg.RawMessage{
@ -1151,7 +1186,8 @@ func TestPeerCapabilities(t *testing.T) {
},
},
{
name: "case=insensitive-caps",
name: "tag-owned-case-insensitive-caps",
status: tagOwnedStatus,
whois: &apitype.WhoIsResponse{
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityWebUI: []tailcfg.RawMessage{
@ -1165,7 +1201,8 @@ func TestPeerCapabilities(t *testing.T) {
},
},
{
name: "random-canEdit-contents-dont-error",
name: "tag-owned-random-canEdit-contents-dont-error",
status: tagOwnedStatus,
whois: &apitype.WhoIsResponse{
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityWebUI: []tailcfg.RawMessage{
@ -1178,7 +1215,8 @@ func TestPeerCapabilities(t *testing.T) {
},
},
{
name: "no-canEdit-section",
name: "tag-owned-no-canEdit-section",
status: tagOwnedStatus,
whois: &apitype.WhoIsResponse{
CapMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityWebUI: []tailcfg.RawMessage{
@ -1191,7 +1229,7 @@ func TestPeerCapabilities(t *testing.T) {
}
for _, tt := range toPeerCapsTests {
t.Run("toPeerCapabilities-"+tt.name, func(t *testing.T) {
got, err := toPeerCapabilities(tt.whois)
got, err := toPeerCapabilities(tt.status, tt.whois)
if err != nil {
t.Fatalf("unexpected: %v", err)
}