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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
//go:build !plan9
package apiproxy
import (
"net/http"
"net/netip"
"reflect"
"testing"
"github.com/google/go-cmp/cmp"
"go.uber.org/zap"
"tailscale.com/client/tailscale/apitype"
"tailscale.com/tailcfg"
"tailscale.com/util/must"
)
func TestImpersonationHeaders(t *testing.T) {
zl, err := zap.NewDevelopment()
if err != nil {
t.Fatal(err)
}
tests := []struct {
name string
emailish string
tags []string
capMap tailcfg.PeerCapMap
wantHeaders http.Header
}{
{
name: "user",
emailish: "foo@example.com",
wantHeaders: http.Header{
"Impersonate-User": {"foo@example.com"},
},
},
{
name: "tagged",
emailish: "tagged-device",
tags: []string{"tag:foo", "tag:bar"},
wantHeaders: http.Header{
"Impersonate-User": {"node.ts.net"},
"Impersonate-Group": {"tag:foo", "tag:bar"},
},
},
{
name: "user-with-cap",
emailish: "foo@example.com",
capMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityKubernetes: {
tailcfg.RawMessage(`{"impersonate":{"groups":["group1","group2"]}}`),
tailcfg.RawMessage(`{"impersonate":{"groups":["group1","group3"]}}`), // One group is duplicated.
tailcfg.RawMessage(`{"impersonate":{"groups":["group4"]}}`),
tailcfg.RawMessage(`{"impersonate":{"groups":["group2"]}}`), // duplicate
// These should be ignored, but should parse correctly.
tailcfg.RawMessage(`{}`),
tailcfg.RawMessage(`{"impersonate":{}}`),
tailcfg.RawMessage(`{"impersonate":{"groups":[]}}`),
},
},
wantHeaders: http.Header{
"Impersonate-Group": {"group1", "group2", "group3", "group4"},
"Impersonate-User": {"foo@example.com"},
},
},
{
name: "tagged-with-cap",
emailish: "tagged-device",
tags: []string{"tag:foo", "tag:bar"},
capMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityKubernetes: {
tailcfg.RawMessage(`{"impersonate":{"groups":["group1"]}}`),
},
},
wantHeaders: http.Header{
"Impersonate-Group": {"group1"},
"Impersonate-User": {"node.ts.net"},
},
},
{
name: "mix-of-caps",
emailish: "tagged-device",
tags: []string{"tag:foo", "tag:bar"},
capMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityKubernetes: {
tailcfg.RawMessage(`{"impersonate":{"groups":["group1"]},"recorder":["tag:foo"],"enforceRecorder":true}`),
},
},
wantHeaders: http.Header{
"Impersonate-Group": {"group1"},
"Impersonate-User": {"node.ts.net"},
},
},
{
name: "bad-cap",
emailish: "tagged-device",
tags: []string{"tag:foo", "tag:bar"},
capMap: tailcfg.PeerCapMap{
tailcfg.PeerCapabilityKubernetes: {
tailcfg.RawMessage(`[]`),
},
},
wantHeaders: http.Header{},
},
}
for _, tc := range tests {
r := must.Get(http.NewRequest("GET", "https://op.ts.net/api/foo", nil))
r = r.WithContext(whoIsKey.WithValue(r.Context(), &apitype.WhoIsResponse{
Node: &tailcfg.Node{
Name: "node.ts.net",
Tags: tc.tags,
},
UserProfile: &tailcfg.UserProfile{
LoginName: tc.emailish,
},
CapMap: tc.capMap,
}))
addImpersonationHeaders(r, zl.Sugar())
if d := cmp.Diff(tc.wantHeaders, r.Header); d != "" {
t.Errorf("unexpected header (-want +got):\n%s", d)
}
}
}
func Test_determineRecorderConfig(t *testing.T) {
addr1, addr2 := netip.MustParseAddrPort("[fd7a:115c:a1e0:ab12:4843:cd96:626b:628b]:80"), netip.MustParseAddrPort("100.99.99.99:80")
tests := []struct {
name string
wantFailOpen bool
wantRecorderAddresses []netip.AddrPort
who *apitype.WhoIsResponse
}{
{
name: "two_ips_fail_closed",
who: whoResp(map[string][]string{string(tailcfg.PeerCapabilityKubernetes): {`{"recorderAddrs":["[fd7a:115c:a1e0:ab12:4843:cd96:626b:628b]:80","100.99.99.99:80"],"enforceRecorder":true}`}}),
wantRecorderAddresses: []netip.AddrPort{addr1, addr2},
},
{
name: "two_ips_fail_open",
who: whoResp(map[string][]string{string(tailcfg.PeerCapabilityKubernetes): {`{"recorderAddrs":["[fd7a:115c:a1e0:ab12:4843:cd96:626b:628b]:80","100.99.99.99:80"]}`}}),
wantRecorderAddresses: []netip.AddrPort{addr1, addr2},
wantFailOpen: true,
},
{
name: "odd_rule_combination_fail_closed",
who: whoResp(map[string][]string{string(tailcfg.PeerCapabilityKubernetes): {`{"recorderAddrs":["100.99.99.99:80"],"enforceRecorder":false}`, `{"recorderAddrs":["[fd7a:115c:a1e0:ab12:4843:cd96:626b:628b]:80"]}`, `{"enforceRecorder":true,"impersonate":{"groups":["system:masters"]}}`}}),
wantRecorderAddresses: []netip.AddrPort{addr2, addr1},
},
{
name: "no_caps",
who: whoResp(map[string][]string{}),
wantFailOpen: true,
},
{
name: "no_recorder_caps",
who: whoResp(map[string][]string{"foo": {`{"x":"y"}`}, string(tailcfg.PeerCapabilityKubernetes): {`{"impersonate":{"groups":["system:masters"]}}`}}),
wantFailOpen: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c, err := determineRecorderConfig(tt.who)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if c.failOpen != tt.wantFailOpen {
t.Errorf("determineRecorderConfig() gotFailOpen = %v, want %v", c.failOpen, tt.wantFailOpen)
}
if !reflect.DeepEqual(c.recorderAddresses, tt.wantRecorderAddresses) {
t.Errorf("determineRecorderConfig() gotRecorderAddresses = %v, want %v", c.recorderAddresses, tt.wantRecorderAddresses)
}
})
}
}
func whoResp(capMap map[string][]string) *apitype.WhoIsResponse {
resp := &apitype.WhoIsResponse{
CapMap: tailcfg.PeerCapMap{},
}
for cap, rules := range capMap {
resp.CapMap[tailcfg.PeerCapability(cap)] = raw(rules...)
}
return resp
}
func raw(in ...string) []tailcfg.RawMessage {
var out []tailcfg.RawMessage
for _, i := range in {
out = append(out, tailcfg.RawMessage(i))
}
return out
}
|
