mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-11-03 23:40:03 +00:00
348 lines
9.6 KiB
Go
348 lines
9.6 KiB
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 apiserver
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"net/http/httptest"
|
|
"reflect"
|
|
"sync"
|
|
"testing"
|
|
|
|
"k8s.io/kubernetes/pkg/api"
|
|
authenticationapi "k8s.io/kubernetes/pkg/apis/authentication"
|
|
"k8s.io/kubernetes/pkg/auth/authorizer"
|
|
"k8s.io/kubernetes/pkg/auth/user"
|
|
)
|
|
|
|
type impersonateAuthorizer struct{}
|
|
|
|
func (impersonateAuthorizer) Authorize(a authorizer.Attributes) (authorized bool, reason string, err error) {
|
|
user := a.GetUser()
|
|
|
|
switch {
|
|
case user.GetName() == "system:admin":
|
|
return true, "", nil
|
|
|
|
case user.GetName() == "tester":
|
|
return false, "", fmt.Errorf("works on my machine")
|
|
|
|
case user.GetName() == "deny-me":
|
|
return false, "denied", nil
|
|
}
|
|
|
|
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "wheel" && a.GetVerb() == "impersonate" && a.GetResource() == "users" {
|
|
return true, "", nil
|
|
}
|
|
|
|
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "sa-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "serviceaccounts" {
|
|
return true, "", nil
|
|
}
|
|
|
|
if len(user.GetGroups()) > 0 && user.GetGroups()[0] == "regular-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "users" {
|
|
return true, "", nil
|
|
}
|
|
|
|
if len(user.GetGroups()) > 1 && user.GetGroups()[1] == "group-impersonater" && a.GetVerb() == "impersonate" && a.GetResource() == "groups" {
|
|
return true, "", nil
|
|
}
|
|
|
|
if len(user.GetGroups()) > 1 && user.GetGroups()[1] == "extra-setter-scopes" && a.GetVerb() == "impersonate" && a.GetResource() == "userextras" && a.GetSubresource() == "scopes" {
|
|
return true, "", 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" {
|
|
return true, "", nil
|
|
}
|
|
|
|
if len(user.GetGroups()) > 1 && user.GetGroups()[1] == "extra-setter-project" && a.GetVerb() == "impersonate" && a.GetResource() == "userextras" && a.GetSubresource() == "project" {
|
|
return true, "", nil
|
|
}
|
|
|
|
return false, "deny by default", nil
|
|
}
|
|
|
|
func TestImpersonationFilter(t *testing.T) {
|
|
testCases := []struct {
|
|
name string
|
|
user user.Info
|
|
impersonationUser string
|
|
impersonationGroups []string
|
|
impersonationUserExtras map[string][]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.StatusForbidden,
|
|
},
|
|
{
|
|
name: "impersonating-extra-without-user",
|
|
user: &user.DefaultInfo{
|
|
Name: "tester",
|
|
},
|
|
impersonationUserExtras: map[string][]string{"scopes": {"scope-a"}},
|
|
expectedUser: &user.DefaultInfo{
|
|
Name: "tester",
|
|
},
|
|
expectedCode: http.StatusForbidden,
|
|
},
|
|
{
|
|
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"},
|
|
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{},
|
|
Extra: map[string][]string{"scopes": {"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{},
|
|
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"},
|
|
Extra: map[string][]string{},
|
|
},
|
|
expectedCode: http.StatusOK,
|
|
},
|
|
}
|
|
|
|
requestContextMapper = api.NewRequestContextMapper()
|
|
var ctx api.Context
|
|
var actualUser user.Info
|
|
var lock sync.Mutex
|
|
|
|
doNothingHandler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
|
|
currentCtx, _ := requestContextMapper.Get(req)
|
|
user, exists := api.UserFrom(currentCtx)
|
|
if !exists {
|
|
actualUser = nil
|
|
return
|
|
}
|
|
|
|
actualUser = user
|
|
})
|
|
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()
|
|
requestContextMapper.Update(req, ctx)
|
|
currentCtx, _ := requestContextMapper.Get(req)
|
|
|
|
user, exists := api.UserFrom(currentCtx)
|
|
if !exists {
|
|
actualUser = nil
|
|
return
|
|
} else {
|
|
actualUser = user
|
|
}
|
|
|
|
delegate.ServeHTTP(w, req)
|
|
})
|
|
}(WithImpersonation(doNothingHandler, requestContextMapper, impersonateAuthorizer{}))
|
|
handler, _ = api.NewRequestContextFilter(requestContextMapper, handler)
|
|
|
|
server := httptest.NewServer(handler)
|
|
defer server.Close()
|
|
|
|
for _, tc := range testCases {
|
|
func() {
|
|
lock.Lock()
|
|
defer lock.Unlock()
|
|
ctx = api.WithUser(api.NewContext(), tc.user)
|
|
}()
|
|
|
|
req, err := http.NewRequest("GET", server.URL, nil)
|
|
if err != nil {
|
|
t.Errorf("%s: unexpected error: %v", tc.name, err)
|
|
continue
|
|
}
|
|
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)
|
|
}
|
|
}
|
|
|
|
resp, err := http.DefaultClient.Do(req)
|
|
if err != nil {
|
|
t.Errorf("%s: unexpected error: %v", tc.name, err)
|
|
continue
|
|
}
|
|
if resp.StatusCode != tc.expectedCode {
|
|
t.Errorf("%s: expected %v, actual %v", tc.name, tc.expectedCode, resp.StatusCode)
|
|
continue
|
|
}
|
|
|
|
if !reflect.DeepEqual(actualUser, tc.expectedUser) {
|
|
t.Errorf("%s: expected %#v, actual %#v", tc.name, tc.expectedUser, actualUser)
|
|
continue
|
|
}
|
|
}
|
|
}
|