func newAuthenticator(config configapi.MasterConfig, etcdHelper storage.Interface, tokenGetter serviceaccount.ServiceAccountTokenGetter, apiClientCAs *x509.CertPool, groupMapper identitymapper.UserToGroupMapper) authenticator.Request {
authenticators := []authenticator.Request{}
// ServiceAccount token
if len(config.ServiceAccountConfig.PublicKeyFiles) > 0 {
publicKeys := []*rsa.PublicKey{}
for _, keyFile := range config.ServiceAccountConfig.PublicKeyFiles {
publicKey, err := serviceaccount.ReadPublicKey(keyFile)
if err != nil {
glog.Fatalf("Error reading service account key file %s: %v", keyFile, err)
}
publicKeys = append(publicKeys, publicKey)
}
tokenAuthenticator := serviceaccount.JWTTokenAuthenticator(publicKeys, true, tokenGetter)
authenticators = append(authenticators, bearertoken.New(tokenAuthenticator, true))
}
// OAuth token
if config.OAuthConfig != nil {
tokenAuthenticator := getEtcdTokenAuthenticator(etcdHelper, groupMapper)
authenticators = append(authenticators, bearertoken.New(tokenAuthenticator, true))
// Allow token as access_token param for WebSockets
authenticators = append(authenticators, paramtoken.New("access_token", tokenAuthenticator, true))
}
if configapi.UseTLS(config.ServingInfo.ServingInfo) {
// build cert authenticator
// TODO: add "system:" prefix in authenticator, limit cert to username
// TODO: add "system:" prefix to groups in authenticator, limit cert to group name
opts := x509request.DefaultVerifyOptions()
opts.Roots = apiClientCAs
certauth := x509request.New(opts, x509request.SubjectToUserConversion)
authenticators = append(authenticators, certauth)
}
// TODO: make anonymous auth optional?
ret := &unionrequest.Authenticator{
FailOnError: true,
Handlers: []authenticator.Request{
group.NewGroupAdder(unionrequest.NewUnionAuthentication(authenticators...), []string{bootstrappolicy.AuthenticatedGroup}),
authenticator.RequestFunc(func(req *http.Request) (user.Info, bool, error) {
return &user.DefaultInfo{Name: unauthenticatedUsername, Groups: []string{bootstrappolicy.UnauthenticatedGroup}}, true, nil
}),
},
}
return ret
}
// newServiceAccountAuthenticator returns an authenticator.Request or an error
func newServiceAccountAuthenticator(keyfile string, lookup bool, helper tools.EtcdHelper) (authenticator.Request, error) {
publicKey, err := serviceaccount.ReadPublicKey(keyfile)
if err != nil {
return nil, err
}
var serviceAccountGetter serviceaccount.ServiceAccountTokenGetter
if lookup {
// If we need to look up service accounts and tokens,
// go directly to etcd to avoid recursive auth insanity
serviceAccountGetter = serviceaccount.NewGetterFromEtcdHelper(helper)
}
tokenAuthenticator := serviceaccount.JWTTokenAuthenticator([]*rsa.PublicKey{publicKey}, lookup, serviceAccountGetter)
return bearertoken.New(tokenAuthenticator), nil
}
// startServiceAccountTestServer returns a started server
// It is the responsibility of the caller to ensure the returned stopFunc is called
func startServiceAccountTestServer(t *testing.T) (*client.Client, client.Config, func()) {
deleteAllEtcdKeys()
// Etcd
helper, err := master.NewEtcdHelper(newEtcdClient(), testapi.Version(), etcdtest.PathPrefix())
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
// Listener
var m *master.Master
apiServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
m.Handler.ServeHTTP(w, req)
}))
// Anonymous client config
clientConfig := client.Config{Host: apiServer.URL, Version: testapi.Version()}
// Root client
rootClient := client.NewOrDie(&client.Config{Host: apiServer.URL, Version: testapi.Version(), BearerToken: rootToken})
// Set up two authenticators:
// 1. A token authenticator that maps the rootToken to the "root" user
// 2. A ServiceAccountToken authenticator that validates ServiceAccount tokens
rootTokenAuth := authenticator.TokenFunc(func(token string) (user.Info, bool, error) {
if token == rootToken {
return &user.DefaultInfo{rootUserName, "", []string{}}, true, nil
}
return nil, false, nil
})
serviceAccountKey, err := rsa.GenerateKey(rand.Reader, 2048)
serviceAccountTokenGetter := serviceaccount.NewGetterFromClient(rootClient)
serviceAccountTokenAuth := serviceaccount.JWTTokenAuthenticator([]*rsa.PublicKey{&serviceAccountKey.PublicKey}, true, serviceAccountTokenGetter)
authenticator := union.New(
bearertoken.New(rootTokenAuth),
bearertoken.New(serviceAccountTokenAuth),
)
// Set up a stub authorizer:
// 1. The "root" user is allowed to do anything
// 2. ServiceAccounts named "ro" are allowed read-only operations in their namespace
// 3. ServiceAccounts named "rw" are allowed any operation in their namespace
authorizer := authorizer.AuthorizerFunc(func(attrs authorizer.Attributes) error {
username := attrs.GetUserName()
ns := attrs.GetNamespace()
// If the user is "root"...
if username == rootUserName {
// allow them to do anything
return nil
}
// If the user is a service account...
if serviceAccountNamespace, serviceAccountName, err := serviceaccount.SplitUsername(username); err == nil {
// Limit them to their own namespace
if serviceAccountNamespace == ns {
switch serviceAccountName {
case readOnlyServiceAccountName:
if attrs.IsReadOnly() {
return nil
}
case readWriteServiceAccountName:
return nil
}
}
}
return fmt.Errorf("User %s is denied (ns=%s, readonly=%v, resource=%s)", username, ns, attrs.IsReadOnly(), attrs.GetResource())
})
// Set up admission plugin to auto-assign serviceaccounts to pods
serviceAccountAdmission := serviceaccountadmission.NewServiceAccount(rootClient)
// Create a master and install handlers into mux.
m = master.New(&master.Config{
EtcdHelper: helper,
KubeletClient: client.FakeKubeletClient{},
EnableLogsSupport: false,
EnableUISupport: false,
EnableIndex: true,
APIPrefix: "/api",
Authenticator: authenticator,
Authorizer: authorizer,
AdmissionControl: serviceAccountAdmission,
})
// Start the service account and service account token controllers
tokenController := serviceaccount.NewTokensController(rootClient, serviceaccount.DefaultTokenControllerOptions(serviceaccount.JWTTokenGenerator(serviceAccountKey)))
tokenController.Run()
serviceAccountController := serviceaccount.NewServiceAccountsController(rootClient, serviceaccount.DefaultServiceAccountsControllerOptions())
serviceAccountController.Run()
// Start the admission plugin reflectors
serviceAccountAdmission.Run()
stop := func() {
tokenController.Stop()
serviceAccountController.Stop()
serviceAccountAdmission.Stop()
apiServer.Close()
}
return rootClient, clientConfig, stop
}