mirror of https://github.com/status-im/consul.git
694 lines
20 KiB
Go
694 lines
20 KiB
Go
package certmon
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import (
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"context"
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"crypto/tls"
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"fmt"
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"net"
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"sync"
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"testing"
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"time"
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"github.com/hashicorp/consul/agent/cache"
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cachetype "github.com/hashicorp/consul/agent/cache-types"
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"github.com/hashicorp/consul/agent/connect"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/agent/token"
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"github.com/hashicorp/consul/sdk/testutil"
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"github.com/hashicorp/consul/sdk/testutil/retry"
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"github.com/hashicorp/consul/tlsutil"
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"github.com/hashicorp/go-uuid"
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"github.com/stretchr/testify/mock"
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"github.com/stretchr/testify/require"
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)
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type mockFallback struct {
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mock.Mock
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}
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func (m *mockFallback) fallback(ctx context.Context) (*structs.SignedResponse, error) {
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ret := m.Called()
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resp, _ := ret.Get(0).(*structs.SignedResponse)
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return resp, ret.Error(1)
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}
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type mockWatcher struct {
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ch chan<- cache.UpdateEvent
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done <-chan struct{}
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}
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type mockCache struct {
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mock.Mock
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lock sync.Mutex
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watchers map[string][]mockWatcher
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}
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func (m *mockCache) Notify(ctx context.Context, t string, r cache.Request, correlationID string, ch chan<- cache.UpdateEvent) error {
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m.lock.Lock()
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key := r.CacheInfo().Key
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m.watchers[key] = append(m.watchers[key], mockWatcher{ch: ch, done: ctx.Done()})
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m.lock.Unlock()
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ret := m.Called(t, r, correlationID)
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return ret.Error(0)
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}
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func (m *mockCache) Prepopulate(t string, result cache.FetchResult, dc string, token string, key string) error {
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ret := m.Called(t, result, dc, token, key)
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return ret.Error(0)
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}
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func (m *mockCache) sendNotification(ctx context.Context, key string, u cache.UpdateEvent) bool {
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m.lock.Lock()
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defer m.lock.Unlock()
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watchers, ok := m.watchers[key]
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if !ok || len(m.watchers) < 1 {
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return false
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}
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var newWatchers []mockWatcher
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for _, watcher := range watchers {
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select {
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case watcher.ch <- u:
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newWatchers = append(newWatchers, watcher)
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case <-watcher.done:
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// do nothing, this watcher will be removed from the list
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case <-ctx.Done():
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// return doesn't matter here really, the test is being cancelled
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return true
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}
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}
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// this removes any already cancelled watches from being sent to
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m.watchers[key] = newWatchers
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return true
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}
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func newMockCache(t *testing.T) *mockCache {
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mcache := mockCache{watchers: make(map[string][]mockWatcher)}
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mcache.Test(t)
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return &mcache
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}
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func waitForChan(timer *time.Timer, ch <-chan struct{}) bool {
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select {
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case <-timer.C:
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return false
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case <-ch:
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return true
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}
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}
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func waitForChans(timeout time.Duration, chans ...<-chan struct{}) bool {
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timer := time.NewTimer(timeout)
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defer timer.Stop()
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for _, ch := range chans {
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if !waitForChan(timer, ch) {
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return false
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}
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}
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return true
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}
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func testTLSConfigurator(t *testing.T) *tlsutil.Configurator {
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t.Helper()
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logger := testutil.Logger(t)
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cfg, err := tlsutil.NewConfigurator(tlsutil.Config{AutoTLS: true}, logger)
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require.NoError(t, err)
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return cfg
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}
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func newLeaf(t *testing.T, ca *structs.CARoot, idx uint64, expiration time.Duration) *structs.IssuedCert {
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t.Helper()
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pub, priv, err := connect.TestAgentLeaf(t, "node", "foo", ca, expiration)
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require.NoError(t, err)
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cert, err := connect.ParseCert(pub)
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require.NoError(t, err)
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spiffeID, err := connect.ParseCertURI(cert.URIs[0])
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require.NoError(t, err)
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agentID, ok := spiffeID.(*connect.SpiffeIDAgent)
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require.True(t, ok, "certificate doesn't have an agent leaf cert URI")
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return &structs.IssuedCert{
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SerialNumber: cert.SerialNumber.String(),
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CertPEM: pub,
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PrivateKeyPEM: priv,
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ValidAfter: cert.NotBefore,
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ValidBefore: cert.NotAfter,
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Agent: agentID.Agent,
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AgentURI: agentID.URI().String(),
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EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
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RaftIndex: structs.RaftIndex{
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CreateIndex: idx,
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ModifyIndex: idx,
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},
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}
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}
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type testCertMonitor struct {
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monitor *CertMonitor
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mcache *mockCache
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tls *tlsutil.Configurator
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tokens *token.Store
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fallback *mockFallback
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extraCACerts []string
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initialCert *structs.IssuedCert
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initialRoots *structs.IndexedCARoots
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// these are some variables that the CertMonitor was created with
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datacenter string
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nodeName string
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dns []string
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ips []net.IP
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verifyServerHostname bool
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}
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func newTestCertMonitor(t *testing.T) testCertMonitor {
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t.Helper()
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tlsConfigurator := testTLSConfigurator(t)
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tokens := new(token.Store)
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id, err := uuid.GenerateUUID()
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require.NoError(t, err)
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tokens.UpdateAgentToken(id, token.TokenSourceConfig)
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ca := connect.TestCA(t, nil)
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manualCA := connect.TestCA(t, nil)
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// this cert is setup to not expire quickly. this will prevent
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// the test from accidentally running the fallback routine
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// before we want to force that to happen.
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issued := newLeaf(t, ca, 1, 10*time.Minute)
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indexedRoots := structs.IndexedCARoots{
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ActiveRootID: ca.ID,
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TrustDomain: connect.TestClusterID,
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Roots: []*structs.CARoot{
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ca,
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},
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QueryMeta: structs.QueryMeta{
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Index: 1,
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},
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}
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initialCerts := &structs.SignedResponse{
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ConnectCARoots: indexedRoots,
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IssuedCert: *issued,
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ManualCARoots: []string{manualCA.RootCert},
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VerifyServerHostname: true,
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}
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dnsSANs := []string{"test.dev"}
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ipSANs := []net.IP{net.IPv4(198, 18, 0, 1)}
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// this chan should be unbuffered so we can detect when the fallback func has been called.
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fallback := &mockFallback{}
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mcache := newMockCache(t)
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rootRes := cache.FetchResult{Value: &indexedRoots, Index: 1}
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rootsReq := structs.DCSpecificRequest{Datacenter: "foo"}
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mcache.On("Prepopulate", cachetype.ConnectCARootName, rootRes, "foo", "", rootsReq.CacheInfo().Key).Return(nil).Once()
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leafReq := cachetype.ConnectCALeafRequest{
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Token: tokens.AgentToken(),
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Agent: "node",
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Datacenter: "foo",
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DNSSAN: dnsSANs,
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IPSAN: ipSANs,
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}
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leafRes := cache.FetchResult{
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Value: issued,
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Index: 1,
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State: cachetype.ConnectCALeafSuccess(ca.SigningKeyID),
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}
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mcache.On("Prepopulate", cachetype.ConnectCALeafName, leafRes, "foo", tokens.AgentToken(), leafReq.Key()).Return(nil).Once()
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// we can assert more later but this should always be done.
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defer mcache.AssertExpectations(t)
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cfg := new(Config).
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WithCache(mcache).
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WithLogger(testutil.Logger(t)).
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WithTLSConfigurator(tlsConfigurator).
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WithTokens(tokens).
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WithFallback(fallback.fallback).
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WithDNSSANs(dnsSANs).
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WithIPSANs(ipSANs).
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WithDatacenter("foo").
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WithNodeName("node").
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WithFallbackLeeway(time.Nanosecond).
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WithFallbackRetry(time.Millisecond)
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monitor, err := New(cfg)
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require.NoError(t, err)
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require.NotNil(t, monitor)
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require.NoError(t, monitor.Update(initialCerts))
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return testCertMonitor{
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monitor: monitor,
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tls: tlsConfigurator,
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tokens: tokens,
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mcache: mcache,
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fallback: fallback,
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extraCACerts: []string{manualCA.RootCert},
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initialCert: issued,
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initialRoots: &indexedRoots,
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datacenter: "foo",
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nodeName: "node",
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dns: dnsSANs,
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ips: ipSANs,
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verifyServerHostname: true,
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}
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}
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func tlsCertificateFromIssued(t *testing.T, issued *structs.IssuedCert) *tls.Certificate {
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t.Helper()
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cert, err := tls.X509KeyPair([]byte(issued.CertPEM), []byte(issued.PrivateKeyPEM))
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require.NoError(t, err)
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return &cert
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}
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// convenience method to get a TLS Certificate from the intial issued certificate and priv key
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func (cm *testCertMonitor) initialTLSCertificate(t *testing.T) *tls.Certificate {
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t.Helper()
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return tlsCertificateFromIssued(t, cm.initialCert)
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}
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// just a convenience method to get a list of all the CA pems that we set up regardless
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// of manual vs connect.
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func (cm *testCertMonitor) initialCACerts() []string {
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pems := cm.extraCACerts
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for _, root := range cm.initialRoots.Roots {
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pems = append(pems, root.RootCert)
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}
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return pems
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}
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func (cm *testCertMonitor) assertExpectations(t *testing.T) {
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cm.mcache.AssertExpectations(t)
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cm.fallback.AssertExpectations(t)
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}
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func TestCertMonitor_InitialCerts(t *testing.T) {
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// this also ensures that the cache was prepopulated properly
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cm := newTestCertMonitor(t)
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// verify that the certificate was injected into the TLS configurator correctly
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require.Equal(t, cm.initialTLSCertificate(t), cm.tls.Cert())
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// verify that the CA certs (both Connect and manual ones) were injected correctly
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require.ElementsMatch(t, cm.initialCACerts(), cm.tls.CAPems())
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// verify that the auto-tls verify server hostname setting was injected correctly
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require.Equal(t, cm.verifyServerHostname, cm.tls.VerifyServerHostname())
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}
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func TestCertMonitor_GoRoutineManagement(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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cm := newTestCertMonitor(t)
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// ensure that the monitor is not running
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require.False(t, cm.monitor.IsRunning())
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// ensure that nothing bad happens and that it reports as stopped
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require.False(t, cm.monitor.Stop())
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// we will never send notifications so these just ignore everything
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cm.mcache.On("Notify", cachetype.ConnectCARootName, &structs.DCSpecificRequest{Datacenter: cm.datacenter}, rootsWatchID).Return(nil).Times(2)
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cm.mcache.On("Notify", cachetype.ConnectCALeafName,
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&cachetype.ConnectCALeafRequest{
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Token: cm.tokens.AgentToken(),
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Datacenter: cm.datacenter,
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Agent: cm.nodeName,
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DNSSAN: cm.dns,
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IPSAN: cm.ips,
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},
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leafWatchID,
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).Return(nil).Times(2)
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done, err := cm.monitor.Start(ctx)
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require.NoError(t, err)
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require.True(t, cm.monitor.IsRunning())
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_, err = cm.monitor.Start(ctx)
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testutil.RequireErrorContains(t, err, "the CertMonitor is already running")
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require.True(t, cm.monitor.Stop())
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require.True(t, waitForChans(100*time.Millisecond, done), "monitor didn't shut down")
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require.False(t, cm.monitor.IsRunning())
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done, err = cm.monitor.Start(ctx)
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require.NoError(t, err)
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// ensure that context cancellation causes us to stop as well
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cancel()
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require.True(t, waitForChans(100*time.Millisecond, done))
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cm.assertExpectations(t)
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}
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func startedCertMonitor(t *testing.T) (context.Context, testCertMonitor) {
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ctx, cancel := context.WithCancel(context.Background())
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t.Cleanup(cancel)
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cm := newTestCertMonitor(t)
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rootsCtx, rootsCancel := context.WithCancel(ctx)
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defer rootsCancel()
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leafCtx, leafCancel := context.WithCancel(ctx)
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defer leafCancel()
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// initial roots watch
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cm.mcache.On("Notify", cachetype.ConnectCARootName,
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&structs.DCSpecificRequest{
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Datacenter: cm.datacenter,
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},
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rootsWatchID).
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Return(nil).
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Once().
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Run(func(_ mock.Arguments) {
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rootsCancel()
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})
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// the initial watch after starting the monitor
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cm.mcache.On("Notify", cachetype.ConnectCALeafName,
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&cachetype.ConnectCALeafRequest{
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Token: cm.tokens.AgentToken(),
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Datacenter: cm.datacenter,
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Agent: cm.nodeName,
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DNSSAN: cm.dns,
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IPSAN: cm.ips,
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},
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leafWatchID).
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Return(nil).
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Once().
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Run(func(_ mock.Arguments) {
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leafCancel()
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})
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done, err := cm.monitor.Start(ctx)
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require.NoError(t, err)
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// this prevents logs after the test finishes
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t.Cleanup(func() {
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cm.monitor.Stop()
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<-done
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})
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require.True(t,
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waitForChans(100*time.Millisecond, rootsCtx.Done(), leafCtx.Done()),
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"not all watches were started within the alotted time")
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return ctx, cm
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}
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// This test ensures that the cache watches are restarted with the updated
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// token after receiving a token update
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func TestCertMonitor_TokenUpdate(t *testing.T) {
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ctx, cm := startedCertMonitor(t)
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rootsCtx, rootsCancel := context.WithCancel(ctx)
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defer rootsCancel()
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leafCtx, leafCancel := context.WithCancel(ctx)
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defer leafCancel()
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newToken := "8e4fe8db-162d-42d8-81ca-710fb2280ad0"
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// we expect a new roots watch because when the leaf cert watch is restarted so is the root cert watch
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cm.mcache.On("Notify", cachetype.ConnectCARootName,
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&structs.DCSpecificRequest{
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Datacenter: cm.datacenter,
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},
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rootsWatchID).
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Return(nil).
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Once().
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Run(func(_ mock.Arguments) {
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rootsCancel()
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})
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secondWatch := &cachetype.ConnectCALeafRequest{
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Token: newToken,
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Datacenter: cm.datacenter,
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Agent: cm.nodeName,
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DNSSAN: cm.dns,
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IPSAN: cm.ips,
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}
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// the new watch after updating the token
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cm.mcache.On("Notify", cachetype.ConnectCALeafName, secondWatch, leafWatchID).
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Return(nil).
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Once().
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Run(func(args mock.Arguments) {
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leafCancel()
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})
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cm.tokens.UpdateAgentToken(newToken, token.TokenSourceAPI)
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require.True(t,
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waitForChans(100*time.Millisecond, rootsCtx.Done(), leafCtx.Done()),
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"not all watches were restarted within the alotted time")
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cm.assertExpectations(t)
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}
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func TestCertMonitor_RootsUpdate(t *testing.T) {
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ctx, cm := startedCertMonitor(t)
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secondCA := connect.TestCA(t, cm.initialRoots.Roots[0])
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secondRoots := structs.IndexedCARoots{
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ActiveRootID: secondCA.ID,
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TrustDomain: connect.TestClusterID,
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Roots: []*structs.CARoot{
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secondCA,
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cm.initialRoots.Roots[0],
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},
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QueryMeta: structs.QueryMeta{
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Index: 99,
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},
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}
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// assert value of the CA certs prior to updating
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require.ElementsMatch(t, cm.initialCACerts(), cm.tls.CAPems())
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req := structs.DCSpecificRequest{Datacenter: cm.datacenter}
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require.True(t, cm.mcache.sendNotification(ctx, req.CacheInfo().Key, cache.UpdateEvent{
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CorrelationID: rootsWatchID,
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Result: &secondRoots,
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Meta: cache.ResultMeta{
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Index: secondRoots.Index,
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},
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}))
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expectedCAs := append(cm.extraCACerts, secondCA.RootCert, cm.initialRoots.Roots[0].RootCert)
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// this will wait up to 200ms (8 x 25 ms waits between the 9 requests)
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retry.RunWith(&retry.Counter{Count: 9, Wait: 25 * time.Millisecond}, t, func(r *retry.R) {
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require.ElementsMatch(r, expectedCAs, cm.tls.CAPems())
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})
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cm.assertExpectations(t)
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}
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func TestCertMonitor_CertUpdate(t *testing.T) {
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ctx, cm := startedCertMonitor(t)
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secondCert := newLeaf(t, cm.initialRoots.Roots[0], 100, 10*time.Minute)
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// assert value of cert prior to updating the leaf
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require.Equal(t, cm.initialTLSCertificate(t), cm.tls.Cert())
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key := cm.monitor.leafReq.CacheInfo().Key
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// send the new certificate - this notifies only the watchers utilizing
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// the new ACL token
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require.True(t, cm.mcache.sendNotification(ctx, key, cache.UpdateEvent{
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CorrelationID: leafWatchID,
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Result: secondCert,
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Meta: cache.ResultMeta{
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Index: secondCert.ModifyIndex,
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},
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}))
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tlsCert := tlsCertificateFromIssued(t, secondCert)
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// this will wait up to 200ms (8 x 25 ms waits between the 9 requests)
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retry.RunWith(&retry.Counter{Count: 9, Wait: 25 * time.Millisecond}, t, func(r *retry.R) {
|
|
require.Equal(r, tlsCert, cm.tls.Cert())
|
|
})
|
|
|
|
cm.assertExpectations(t)
|
|
}
|
|
|
|
func TestCertMonitor_Fallback(t *testing.T) {
|
|
ctx, cm := startedCertMonitor(t)
|
|
|
|
// at this point everything is operating normally and the monitor is just
|
|
// waiting for events. We are going to send a new cert that is basically
|
|
// already expired and then allow the fallback routine to kick in.
|
|
secondCert := newLeaf(t, cm.initialRoots.Roots[0], 100, time.Nanosecond)
|
|
secondCA := connect.TestCA(t, cm.initialRoots.Roots[0])
|
|
secondRoots := structs.IndexedCARoots{
|
|
ActiveRootID: secondCA.ID,
|
|
TrustDomain: connect.TestClusterID,
|
|
Roots: []*structs.CARoot{
|
|
secondCA,
|
|
cm.initialRoots.Roots[0],
|
|
},
|
|
QueryMeta: structs.QueryMeta{
|
|
Index: 101,
|
|
},
|
|
}
|
|
thirdCert := newLeaf(t, secondCA, 102, 10*time.Minute)
|
|
|
|
// inject a fallback routine error to check that we rerun it quickly
|
|
cm.fallback.On("fallback").Return(nil, fmt.Errorf("induced error")).Once()
|
|
|
|
// expect the fallback routine to be executed and setup the return
|
|
cm.fallback.On("fallback").Return(&structs.SignedResponse{
|
|
ConnectCARoots: secondRoots,
|
|
IssuedCert: *thirdCert,
|
|
ManualCARoots: cm.extraCACerts,
|
|
VerifyServerHostname: true,
|
|
}, nil).Once()
|
|
|
|
// Add another roots cache prepopulation expectation which should happen
|
|
// in response to executing the fallback mechanism
|
|
rootRes := cache.FetchResult{Value: &secondRoots, Index: 101}
|
|
rootsReq := structs.DCSpecificRequest{Datacenter: cm.datacenter}
|
|
cm.mcache.On("Prepopulate", cachetype.ConnectCARootName, rootRes, cm.datacenter, "", rootsReq.CacheInfo().Key).Return(nil).Once()
|
|
|
|
// add another leaf cert cache prepopulation expectation which should happen
|
|
// in response to executing the fallback mechanism
|
|
leafReq := cachetype.ConnectCALeafRequest{
|
|
Token: cm.tokens.AgentToken(),
|
|
Agent: cm.nodeName,
|
|
Datacenter: cm.datacenter,
|
|
DNSSAN: cm.dns,
|
|
IPSAN: cm.ips,
|
|
}
|
|
leafRes := cache.FetchResult{
|
|
Value: thirdCert,
|
|
Index: 101,
|
|
State: cachetype.ConnectCALeafSuccess(secondCA.SigningKeyID),
|
|
}
|
|
cm.mcache.On("Prepopulate", cachetype.ConnectCALeafName, leafRes, leafReq.Datacenter, leafReq.Token, leafReq.Key()).Return(nil).Once()
|
|
|
|
// nothing in the monitor should be looking at this as its only done
|
|
// in response to sending token updates, no need to synchronize
|
|
key := cm.monitor.leafReq.CacheInfo().Key
|
|
// send the new certificate - this notifies only the watchers utilizing
|
|
// the new ACL token
|
|
require.True(t, cm.mcache.sendNotification(ctx, key, cache.UpdateEvent{
|
|
CorrelationID: leafWatchID,
|
|
Result: secondCert,
|
|
Meta: cache.ResultMeta{
|
|
Index: secondCert.ModifyIndex,
|
|
},
|
|
}))
|
|
|
|
// if all went well we would have updated the first certificate which was pretty much expired
|
|
// causing the fallback handler to be invoked almost immediately. The fallback routine will
|
|
// return the response containing the third cert and second CA roots so now we should wait
|
|
// a little while and ensure they were applied to the TLS Configurator
|
|
tlsCert := tlsCertificateFromIssued(t, thirdCert)
|
|
expectedCAs := append(cm.extraCACerts, secondCA.RootCert, cm.initialRoots.Roots[0].RootCert)
|
|
|
|
// this will wait up to 200ms (8 x 25 ms waits between the 9 requests)
|
|
retry.RunWith(&retry.Counter{Count: 9, Wait: 25 * time.Millisecond}, t, func(r *retry.R) {
|
|
require.Equal(r, tlsCert, cm.tls.Cert())
|
|
require.ElementsMatch(r, expectedCAs, cm.tls.CAPems())
|
|
})
|
|
|
|
cm.assertExpectations(t)
|
|
}
|
|
|
|
func TestCertMonitor_New_Errors(t *testing.T) {
|
|
type testCase struct {
|
|
cfg Config
|
|
err string
|
|
}
|
|
|
|
fallback := func(_ context.Context) (*structs.SignedResponse, error) {
|
|
return nil, fmt.Errorf("Unimplemented")
|
|
}
|
|
|
|
tokens := new(token.Store)
|
|
|
|
cases := map[string]testCase{
|
|
"no-cache": {
|
|
cfg: Config{
|
|
TLSConfigurator: testTLSConfigurator(t),
|
|
Fallback: fallback,
|
|
Tokens: tokens,
|
|
Datacenter: "foo",
|
|
NodeName: "bar",
|
|
},
|
|
err: "CertMonitor creation requires a Cache",
|
|
},
|
|
"no-tls-configurator": {
|
|
cfg: Config{
|
|
Cache: cache.New(cache.Options{}),
|
|
Fallback: fallback,
|
|
Tokens: tokens,
|
|
Datacenter: "foo",
|
|
NodeName: "bar",
|
|
},
|
|
err: "CertMonitor creation requires a TLS Configurator",
|
|
},
|
|
"no-fallback": {
|
|
cfg: Config{
|
|
Cache: cache.New(cache.Options{}),
|
|
TLSConfigurator: testTLSConfigurator(t),
|
|
Tokens: tokens,
|
|
Datacenter: "foo",
|
|
NodeName: "bar",
|
|
},
|
|
err: "CertMonitor creation requires specifying a FallbackFunc",
|
|
},
|
|
"no-tokens": {
|
|
cfg: Config{
|
|
Cache: cache.New(cache.Options{}),
|
|
TLSConfigurator: testTLSConfigurator(t),
|
|
Fallback: fallback,
|
|
Datacenter: "foo",
|
|
NodeName: "bar",
|
|
},
|
|
err: "CertMonitor creation requires specifying a token store",
|
|
},
|
|
"no-datacenter": {
|
|
cfg: Config{
|
|
Cache: cache.New(cache.Options{}),
|
|
TLSConfigurator: testTLSConfigurator(t),
|
|
Fallback: fallback,
|
|
Tokens: tokens,
|
|
NodeName: "bar",
|
|
},
|
|
err: "CertMonitor creation requires specifying the datacenter",
|
|
},
|
|
"no-node-name": {
|
|
cfg: Config{
|
|
Cache: cache.New(cache.Options{}),
|
|
TLSConfigurator: testTLSConfigurator(t),
|
|
Fallback: fallback,
|
|
Tokens: tokens,
|
|
Datacenter: "foo",
|
|
},
|
|
err: "CertMonitor creation requires specifying the agent's node name",
|
|
},
|
|
}
|
|
|
|
for name, tcase := range cases {
|
|
t.Run(name, func(t *testing.T) {
|
|
monitor, err := New(&tcase.cfg)
|
|
testutil.RequireErrorContains(t, err, tcase.err)
|
|
require.Nil(t, monitor)
|
|
})
|
|
}
|
|
}
|