kubernetes impersonation_test 源码
kubernetes impersonation_test 代码
文件路径：/staging/src/k8s.io/apiserver/pkg/endpoints/filters/impersonation_test.go
/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package filters
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"reflect"
"strings"
"sync"
"testing"
authenticationapi "k8s.io/api/authentication/v1"
"k8s.io/apimachinery/pkg/runtime"
serializer "k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/apiserver/pkg/authentication/user"
"k8s.io/apiserver/pkg/authorization/authorizer"
"k8s.io/apiserver/pkg/endpoints/request"
)
type impersonateAuthorizer struct{}
func (impersonateAuthorizer) Authorize(ctx context.Context, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
user := a.GetUser()
switch {
case user.GetName() == "system:admin":
return authorizer.DecisionAllow, "", nil
case user.GetName() == "tester":
return authorizer.DecisionNoOpinion, "", fmt.Errorf("works on my machine")
case user.GetName() == "deny-me":
return authorizer.DecisionNoOpinion, "denied", nil
}
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "wheel" && a.GetVerb() == "impersonate" && a.GetResource() == "users" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "sa-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "serviceaccounts" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "regular-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "users" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 1 && user.GetGroups()[1] == "group-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "groups" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 1 && user.GetGroups()[1] == "extra-setter-scopes" && a.GetVerb() == "impersonate" && a.GetResource() == "userextras" && a.GetSubresource() == "scopes" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 1 && (user.GetGroups()[1] == "escaped-scopes" || user.GetGroups()[1] == "almost-escaped-scopes") {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 1 && user.GetGroups()[1] == "extra-setter-particular-scopes" &&
a.GetVerb() == "impersonate" && a.GetResource() == "userextras" && a.GetSubresource() == "scopes" && a.GetName() == "scope-a" && a.GetAPIGroup() == "authentication.k8s.io" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 1 && user.GetGroups()[1] == "extra-setter-project" && a.GetVerb() == "impersonate" && a.GetResource() == "userextras" && a.GetSubresource() == "project" && a.GetAPIGroup() == "authentication.k8s.io" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "everything-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "users" && a.GetAPIGroup() == "" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "everything-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "uids" && a.GetName() == "some-uid" && a.GetAPIGroup() == "authentication.k8s.io" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "everything-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "groups" && a.GetAPIGroup() == "" {
return authorizer.DecisionAllow, "", nil
}
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "everything-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "userextras" && a.GetSubresource() == "scopes" && a.GetAPIGroup() == "authentication.k8s.io" {
return authorizer.DecisionAllow, "", nil
}
return authorizer.DecisionNoOpinion, "deny by default", nil
}
func TestImpersonationFilter(t *testing.T) {
testCases := []struct {
name string
user user.Info
impersonationUser string
impersonationGroups []string
impersonationUserExtras map[string][]string
impersonationUid string
expectedUser user.Info
expectedCode int
}{
{
name: "not-impersonating",
user: &user.DefaultInfo{
Name: "tester",
},
expectedUser: &user.DefaultInfo{
Name: "tester",
},
expectedCode: http.StatusOK,
},
{
name: "impersonating-error",
user: &user.DefaultInfo{
Name: "tester",
},
impersonationUser: "anyone",
expectedUser: &user.DefaultInfo{
Name: "tester",
},
expectedCode: http.StatusForbidden,
},
{
name: "impersonating-group-without-user",
user: &user.DefaultInfo{
Name: "tester",
},
impersonationGroups: []string{"some-group"},
expectedUser: &user.DefaultInfo{
Name: "tester",
},
expectedCode: http.StatusInternalServerError,
},
{
name: "impersonating-extra-without-user",
user: &user.DefaultInfo{
Name: "tester",
},
impersonationUserExtras: map[string][]string{"scopes": {"scope-a"}},
expectedUser: &user.DefaultInfo{
Name: "tester",
},
expectedCode: http.StatusInternalServerError,
},
{
name: "impersonating-uid-without-user",
user: &user.DefaultInfo{
Name: "tester",
},
impersonationUid: "some-uid",
expectedUser: &user.DefaultInfo{
Name: "tester",
},
expectedCode: http.StatusInternalServerError,
},
{
name: "disallowed-group",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel"},
},
impersonationUser: "system:admin",
impersonationGroups: []string{"some-group"},
expectedUser: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel"},
},
expectedCode: http.StatusForbidden,
},
{
name: "allowed-group",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "group-impersonater"},
},
impersonationUser: "system:admin",
impersonationGroups: []string{"some-group"},
expectedUser: &user.DefaultInfo{
Name: "system:admin",
Groups: []string{"some-group", "system:authenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "disallowed-userextra-1",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel"},
},
impersonationUser: "system:admin",
impersonationGroups: []string{"some-group"},
impersonationUserExtras: map[string][]string{"scopes": {"scope-a"}},
expectedUser: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel"},
},
expectedCode: http.StatusForbidden,
},
{
name: "disallowed-userextra-2",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "extra-setter-project"},
},
impersonationUser: "system:admin",
impersonationGroups: []string{"some-group"},
impersonationUserExtras: map[string][]string{"scopes": {"scope-a"}},
expectedUser: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "extra-setter-project"},
},
expectedCode: http.StatusForbidden,
},
{
name: "disallowed-userextra-3",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "extra-setter-particular-scopes"},
},
impersonationUser: "system:admin",
impersonationGroups: []string{"some-group"},
impersonationUserExtras: map[string][]string{"scopes": {"scope-a", "scope-b"}},
expectedUser: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "extra-setter-particular-scopes"},
},
expectedCode: http.StatusForbidden,
},
{
name: "allowed-userextras",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "extra-setter-scopes"},
},
impersonationUser: "system:admin",
impersonationUserExtras: map[string][]string{"scopes": {"scope-a", "scope-b"}},
expectedUser: &user.DefaultInfo{
Name: "system:admin",
Groups: []string{"system:authenticated"},
Extra: map[string][]string{"scopes": {"scope-a", "scope-b"}},
},
expectedCode: http.StatusOK,
},
{
name: "percent-escaped-userextras",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "escaped-scopes"},
},
impersonationUser: "system:admin",
impersonationUserExtras: map[string][]string{"example.com%2fescaped%e1%9b%84scopes": {"scope-a", "scope-b"}},
expectedUser: &user.DefaultInfo{
Name: "system:admin",
Groups: []string{"system:authenticated"},
Extra: map[string][]string{"example.com/escapedᛄscopes": {"scope-a", "scope-b"}},
},
expectedCode: http.StatusOK,
},
{
name: "almost-percent-escaped-userextras",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "almost-escaped-scopes"},
},
impersonationUser: "system:admin",
impersonationUserExtras: map[string][]string{"almost%zzpercent%xxencoded": {"scope-a", "scope-b"}},
expectedUser: &user.DefaultInfo{
Name: "system:admin",
Groups: []string{"system:authenticated"},
Extra: map[string][]string{"almost%zzpercent%xxencoded": {"scope-a", "scope-b"}},
},
expectedCode: http.StatusOK,
},
{
name: "allowed-users-impersonation",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"regular-impersonater"},
},
impersonationUser: "tester",
expectedUser: &user.DefaultInfo{
Name: "tester",
Groups: []string{"system:authenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "disallowed-impersonating",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"sa-impersonater"},
},
impersonationUser: "tester",
expectedUser: &user.DefaultInfo{
Name: "dev",
Groups: []string{"sa-impersonater"},
},
expectedCode: http.StatusForbidden,
},
{
name: "allowed-sa-impersonating",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"sa-impersonater"},
Extra: map[string][]string{},
},
impersonationUser: "system:serviceaccount:foo:default",
expectedUser: &user.DefaultInfo{
Name: "system:serviceaccount:foo:default",
Groups: []string{"system:serviceaccounts", "system:serviceaccounts:foo", "system:authenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "anonymous-username-prevents-adding-authenticated-group",
user: &user.DefaultInfo{
Name: "system:admin",
},
impersonationUser: "system:anonymous",
expectedUser: &user.DefaultInfo{
Name: "system:anonymous",
Groups: []string{"system:unauthenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "unauthenticated-group-prevents-adding-authenticated-group",
user: &user.DefaultInfo{
Name: "system:admin",
},
impersonationUser: "unknown",
impersonationGroups: []string{"system:unauthenticated"},
expectedUser: &user.DefaultInfo{
Name: "unknown",
Groups: []string{"system:unauthenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "unauthenticated-group-prevents-double-adding-authenticated-group",
user: &user.DefaultInfo{
Name: "system:admin",
},
impersonationUser: "unknown",
impersonationGroups: []string{"system:authenticated"},
expectedUser: &user.DefaultInfo{
Name: "unknown",
Groups: []string{"system:authenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "specified-authenticated-group-prevents-double-adding-authenticated-group",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{"wheel", "group-impersonater"},
},
impersonationUser: "system:admin",
impersonationGroups: []string{"some-group", "system:authenticated"},
expectedUser: &user.DefaultInfo{
Name: "system:admin",
Groups: []string{"some-group", "system:authenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "anonymous-user-should-include-unauthenticated-group",
user: &user.DefaultInfo{
Name: "system:admin",
},
impersonationUser: "system:anonymous",
expectedUser: &user.DefaultInfo{
Name: "system:anonymous",
Groups: []string{"system:unauthenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "anonymous-user-prevents-double-adding-unauthenticated-group",
user: &user.DefaultInfo{
Name: "system:admin",
},
impersonationUser: "system:anonymous",
impersonationGroups: []string{"system:unauthenticated"},
expectedUser: &user.DefaultInfo{
Name: "system:anonymous",
Groups: []string{"system:unauthenticated"},
Extra: map[string][]string{},
},
expectedCode: http.StatusOK,
},
{
name: "allowed-user-impersonation-with-uid",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{
"everything-impersonater",
},
},
impersonationUser: "tester",
impersonationUid: "some-uid",
expectedUser: &user.DefaultInfo{
Name: "tester",
Groups: []string{"system:authenticated"},
Extra: map[string][]string{},
UID: "some-uid",
},
expectedCode: http.StatusOK,
},
{
name: "disallowed-user-impersonation-with-uid",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{
"everything-impersonater",
},
},
impersonationUser: "tester",
impersonationUid: "disallowed-uid",
expectedUser: &user.DefaultInfo{
Name: "dev",
Groups: []string{"everything-impersonater"},
},
expectedCode: http.StatusForbidden,
},
{
name: "allowed-impersonation-with-all-headers",
user: &user.DefaultInfo{
Name: "dev",
Groups: []string{
"everything-impersonater",
},
},
impersonationUser: "tester",
impersonationUid: "some-uid",
impersonationGroups: []string{"system:authenticated"},
impersonationUserExtras: map[string][]string{"scopes": {"scope-a", "scope-b"}},
expectedUser: &user.DefaultInfo{
Name: "tester",
Groups: []string{"system:authenticated"},
UID: "some-uid",
Extra: map[string][]string{"scopes": {"scope-a", "scope-b"}},
},
expectedCode: http.StatusOK,
},
}
var ctx context.Context
var actualUser user.Info
var lock sync.Mutex
doNothingHandler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
currentCtx := req.Context()
user, exists := request.UserFrom(currentCtx)
if !exists {
actualUser = nil
return
}
actualUser = user
if _, ok := req.Header[authenticationapi.ImpersonateUserHeader]; ok {
t.Fatal("user header still present")
}
if _, ok := req.Header[authenticationapi.ImpersonateGroupHeader]; ok {
t.Fatal("group header still present")
}
for key := range req.Header {
if strings.HasPrefix(key, authenticationapi.ImpersonateUserExtraHeaderPrefix) {
t.Fatalf("extra header still present: %v", key)
}
}
if _, ok := req.Header[authenticationapi.ImpersonateUIDHeader]; ok {
t.Fatal("uid header still present")
}
})
handler := func(delegate http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
defer func() {
if r := recover(); r != nil {
t.Errorf("Recovered %v", r)
}
}()
lock.Lock()
defer lock.Unlock()
req = req.WithContext(ctx)
currentCtx := req.Context()
user, exists := request.UserFrom(currentCtx)
if !exists {
actualUser = nil
return
} else {
actualUser = user
}
delegate.ServeHTTP(w, req)
})
}(WithImpersonation(doNothingHandler, impersonateAuthorizer{}, serializer.NewCodecFactory(runtime.NewScheme())))
server := httptest.NewServer(handler)
defer server.Close()
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
func() {
lock.Lock()
defer lock.Unlock()
ctx = request.WithUser(request.NewContext(), tc.user)
}()
req, err := http.NewRequest("GET", server.URL, nil)
if err != nil {
t.Errorf("%s: unexpected error: %v", tc.name, err)
return
}
if len(tc.impersonationUser) > 0 {
req.Header.Add(authenticationapi.ImpersonateUserHeader, tc.impersonationUser)
}
for _, group := range tc.impersonationGroups {
req.Header.Add(authenticationapi.ImpersonateGroupHeader, group)
}
for extraKey, values := range tc.impersonationUserExtras {
for _, value := range values {
req.Header.Add(authenticationapi.ImpersonateUserExtraHeaderPrefix+extraKey, value)
}
}
if len(tc.impersonationUid) > 0 {
req.Header.Add(authenticationapi.ImpersonateUIDHeader, tc.impersonationUid)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
t.Errorf("%s: unexpected error: %v", tc.name, err)
return
}
if resp.StatusCode != tc.expectedCode {
t.Errorf("%s: expected %v, actual %v", tc.name, tc.expectedCode, resp.StatusCode)
return
}
if !reflect.DeepEqual(actualUser, tc.expectedUser) {
t.Errorf("%s: expected %#v, actual %#v", tc.name, tc.expectedUser, actualUser)
return
}
})
}
}
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