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Requires single name for list and watch

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This commit is contained in:
wojtekt 2018-05-06 15:15:32 +02:00
parent dc62a73742
commit f344c5c062
7 changed files with 252 additions and 21 deletions
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22
plugin/pkg/auth/authorizer/node/node_authorizer.go
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@ -91,9 +91,9 @@ func (r *NodeAuthorizer) Authorize(attrs authorizer.Attributes) (authorizer.Deci
requestResource := schema.GroupResource{Group: attrs.GetAPIGroup(), Resource: attrs.GetResource()}
switch requestResource {
case secretResource:
return r.authorizeGet(nodeName, secretVertexType, attrs)
return r.authorizeReadNamespacedObject(nodeName, secretVertexType, attrs)
case configMapResource:
return r.authorizeGet(nodeName, configMapVertexType, attrs)
return r.authorizeReadNamespacedObject(nodeName, configMapVertexType, attrs)
case pvcResource:
if r.features.Enabled(features.ExpandPersistentVolumes) {
if attrs.GetSubresource() == "status" {
@ -154,6 +154,24 @@ func (r *NodeAuthorizer) authorizeGet(nodeName string, startingType vertexType,
return r.authorize(nodeName, startingType, attrs)
}
// authorizeReadNamespacedObject authorizes "get", "list" and "watch" requests to single objects of a
// specified types if they are related to the specified node.
func (r *NodeAuthorizer) authorizeReadNamespacedObject(nodeName string, startingType vertexType, attrs authorizer.Attributes) (authorizer.Decision, string, error) {
if attrs.GetVerb() != "get" && attrs.GetVerb() != "list" && attrs.GetVerb() != "watch" {
glog.V(2).Infof("NODE DENY: %s %#v", nodeName, attrs)
return authorizer.DecisionNoOpinion, "can only read resources of this type", nil
}
if len(attrs.GetSubresource()) > 0 {
glog.V(2).Infof("NODE DENY: %s %#v", nodeName, attrs)
return authorizer.DecisionNoOpinion, "cannot read subresource", nil
}
if len(attrs.GetNamespace()) == 0 {
glog.V(2).Infof("NODE DENY: %s %#v", nodeName, attrs)
return authorizer.DecisionNoOpinion, "can only read namespaced object of this type", nil
}
return r.authorize(nodeName, startingType, attrs)
}
func (r *NodeAuthorizer) authorize(nodeName string, startingType vertexType, attrs authorizer.Attributes) (authorizer.Decision, string, error) {
if len(attrs.GetName()) == 0 {
glog.V(2).Infof("NODE DENY: %s %#v", nodeName, attrs)

25
plugin/pkg/auth/authorizer/node/node_authorizer_test.go
View File

@ -104,6 +104,31 @@ func TestAuthorizer(t *testing.T) {
attrs: authorizer.AttributesRecord{User: node0, ResourceRequest: true, Verb: "get", Resource: "secrets", Name: "secret0-pod0-node0", Namespace: "ns0"},
expect: authorizer.DecisionAllow,
},
{
name: "list allowed secret via pod",
attrs: authorizer.AttributesRecord{User: node0, ResourceRequest: true, Verb: "list", Resource: "secrets", Name: "secret0-pod0-node0", Namespace: "ns0"},
expect: authorizer.DecisionAllow,
},
{
name: "watch allowed secret via pod",
attrs: authorizer.AttributesRecord{User: node0, ResourceRequest: true, Verb: "watch", Resource: "secrets", Name: "secret0-pod0-node0", Namespace: "ns0"},
expect: authorizer.DecisionAllow,
},
{
name: "disallowed list many secrets",
attrs: authorizer.AttributesRecord{User: node0, ResourceRequest: true, Verb: "list", Resource: "secrets", Name: "", Namespace: "ns0"},
expect: authorizer.DecisionNoOpinion,
},
{
name: "disallowed watch many secrets",
attrs: authorizer.AttributesRecord{User: node0, ResourceRequest: true, Verb: "watch", Resource: "secrets", Name: "", Namespace: "ns0"},
expect: authorizer.DecisionNoOpinion,
},
{
name: "disallowed list secrets from all namespaces with name",
attrs: authorizer.AttributesRecord{User: node0, ResourceRequest: true, Verb: "list", Resource: "secrets", Name: "secret0-pod0-node0", Namespace: ""},
expect: authorizer.DecisionNoOpinion,
},
{
name: "allowed shared secret via pod",
attrs: authorizer.AttributesRecord{User: node0, ResourceRequest: true, Verb: "get", Resource: "secrets", Name: "secret0-shared", Namespace: "ns0"},

26
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/get.go
View File

@ -208,19 +208,25 @@ func ListResource(r rest.Lister, rw rest.Watcher, scope RequestScope, forceWatch
if hasName {
// metadata.name is the canonical internal name.
// SelectionPredicate will notice that this is
// a request for a single object and optimize the
// storage query accordingly.
// SelectionPredicate will notice that this is a request for
// a single object and optimize the storage query accordingly.
nameSelector := fields.OneTermEqualSelector("metadata.name", name)
// Note that fieldSelector setting explicitly the "metadata.name"
// will result in reaching this branch (as the value of that field
// is propagated to requestInfo as the name parameter.
// That said, the allowed field selectors in this branch are:
// nil, fields.Everything and field selector matching metadata.name
// for our name.
if opts.FieldSelector != nil && !opts.FieldSelector.Empty() {
// It doesn't make sense to ask for both a name
// and a field selector, since just the name is
// sufficient to narrow down the request to a
// single object.
scope.err(errors.NewBadRequest("both a name and a field selector provided; please provide one or the other."), w, req)
return
selectedName, ok := opts.FieldSelector.RequiresExactMatch("metadata.name")
if !ok || name != selectedName {
scope.err(errors.NewBadRequest("fieldSelector metadata.name doesn't match requested name"), w, req)
return
}
} else {
opts.FieldSelector = nameSelector
}
opts.FieldSelector = nameSelector
}
if opts.Watch || forceWatch {

3
staging/src/k8s.io/apiserver/pkg/endpoints/request/BUILD
View File

@ -30,6 +30,9 @@ go_library(
],
importpath = "k8s.io/apiserver/pkg/endpoints/request",
deps = [
"//vendor/github.com/golang/glog:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/api/validation/path:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/apis/meta/internalversion:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",

38
staging/src/k8s.io/apiserver/pkg/endpoints/request/requestinfo.go
View File

@ -22,8 +22,12 @@ import (
"net/http"
"strings"
"k8s.io/apimachinery/pkg/api/validation/path"
metainternalversion "k8s.io/apimachinery/pkg/apis/meta/internalversion"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
"github.com/golang/glog"
)
// LongRunningRequestCheck is a predicate which is true for long-running http requests.
@ -203,19 +207,35 @@ func (r *RequestInfoFactory) NewRequestInfo(req *http.Request) (*RequestInfo, er
// if there's no name on the request and we thought it was a get before, then the actual verb is a list or a watch
if len(requestInfo.Name) == 0 && requestInfo.Verb == "get" {
// Assumes v1.ListOptions
// Any query value that is not 0 or false is considered true
// see apimachinery/pkg/runtime/conversion.go Convert_Slice_string_To_bool
if values := req.URL.Query()["watch"]; len(values) > 0 {
switch strings.ToLower(values[0]) {
case "false", "0":
requestInfo.Verb = "list"
default:
requestInfo.Verb = "watch"
opts := metainternalversion.ListOptions{}
if err := metainternalversion.ParameterCodec.DecodeParameters(req.URL.Query(), metav1.SchemeGroupVersion, &opts); err != nil {
// An error in parsing request will result in default to "list" and not setting "name" field.
glog.Errorf("Couldn't parse request %#v: %v", req.URL.Query(), err)
// Reset opts to not rely on partial results from parsing.
// However, if watch is set, let's report it.
opts = metainternalversion.ListOptions{}
if values := req.URL.Query()["watch"]; len(values) > 0 {
switch strings.ToLower(values[0]) {
case "false", "0":
default:
opts.Watch = true
}
}
}
if opts.Watch {
requestInfo.Verb = "watch"
} else {
requestInfo.Verb = "list"
}
if opts.FieldSelector != nil {
if name, ok := opts.FieldSelector.RequiresExactMatch("metadata.name"); ok {
if len(path.IsValidPathSegmentName(name)) == 0 {
requestInfo.Name = name
}
}
}
}
// if there's no name on the request and we thought it was a delete before, then the actual verb is deletecollection
if len(requestInfo.Name) == 0 && requestInfo.Verb == "delete" {

76
staging/src/k8s.io/apiserver/pkg/endpoints/request/requestinfo_test.go
View File

@ -17,8 +17,10 @@ limitations under the License.
package request
import (
"fmt"
"net/http"
"reflect"
"strings"
"testing"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@ -187,3 +189,77 @@ func newTestRequestInfoResolver() *RequestInfoFactory {
GrouplessAPIPrefixes: sets.NewString("api"),
}
}
func TestFieldSelectorParsing(t *testing.T) {
tests := []struct {
name string
url string
expectedName string
expectedErr error
expectedVerb string
}{
{
name: "no selector",
url: "/apis/group/version/resource",
expectedVerb: "list",
},
{
name: "metadata.name selector",
url: "/apis/group/version/resource?fieldSelector=metadata.name=name1",
expectedName: "name1",
expectedVerb: "list",
},
{
name: "metadata.name selector with watch",
url: "/apis/group/version/resource?watch=true&fieldSelector=metadata.name=name1",
expectedName: "name1",
expectedVerb: "watch",
},
{
name: "random selector",
url: "/apis/group/version/resource?fieldSelector=foo=bar",
expectedName: "",
expectedVerb: "list",
},
{
name: "invalid selector with metadata.name",
url: "/apis/group/version/resource?fieldSelector=metadata.name=name1,foo",
expectedName: "",
expectedErr: fmt.Errorf("invalid selector"),
expectedVerb: "list",
},
{
name: "invalid selector with metadata.name with watch",
url: "/apis/group/version/resource?fieldSelector=metadata.name=name1,foo&watch=true",
expectedName: "",
expectedErr: fmt.Errorf("invalid selector"),
expectedVerb: "watch",
},
{
name: "invalid selector with metadata.name with watch false",
url: "/apis/group/version/resource?fieldSelector=metadata.name=name1,foo&watch=false",
expectedName: "",
expectedErr: fmt.Errorf("invalid selector"),
expectedVerb: "list",
},
}
resolver := newTestRequestInfoResolver()
for _, tc := range tests {
req, _ := http.NewRequest("GET", tc.url, nil)
apiRequestInfo, err := resolver.NewRequestInfo(req)
if err != nil {
if tc.expectedErr == nil || !strings.Contains(err.Error(), tc.expectedErr.Error()) {
t.Errorf("%s: Unexpected error %v", tc.name, err)
}
}
if e, a := tc.expectedName, apiRequestInfo.Name; e != a {
t.Errorf("%s: expected %v, actual %v", tc.name, e, a)
}
if e, a := tc.expectedVerb, apiRequestInfo.Verb; e != a {
t.Errorf("%s: expected verb %v, actual %v", tc.name, e, a)
}
}
}

83
test/integration/apiserver/apiserver_test.go
View File

@ -238,3 +238,86 @@ func TestAPIListChunking(t *testing.T) {
t.Errorf("unexpected items: %#v", list)
}
}
func makeSecret(name string) *v1.Secret {
return &v1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: name,
},
Data: map[string][]byte{
"key": []byte("value"),
},
}
}
func TestNameInFieldSelector(t *testing.T) {
s, clientSet, closeFn := setup(t)
defer closeFn()
numNamespaces := 3
namespaces := make([]*v1.Namespace, 0, numNamespaces)
for i := 0; i < 3; i++ {
ns := framework.CreateTestingNamespace(fmt.Sprintf("ns%d", i), s, t)
defer framework.DeleteTestingNamespace(ns, s, t)
namespaces = append(namespaces, ns)
_, err := clientSet.CoreV1().Secrets(ns.Name).Create(makeSecret("foo"))
if err != nil {
t.Errorf("Couldn't create secret: %v", err)
}
_, err = clientSet.CoreV1().Secrets(ns.Name).Create(makeSecret("bar"))
if err != nil {
t.Errorf("Couldn't create secret: %v", err)
}
}
testcases := []struct {
namespace string
selector string
expectedSecrets int
}{
{
namespace: "",
selector: "metadata.name=foo",
expectedSecrets: numNamespaces,
},
{
namespace: "",
selector: "metadata.name=foo,metadata.name=bar",
expectedSecrets: 0,
},
{
namespace: "",
selector: "metadata.name=foo,metadata.namespace=ns1",
expectedSecrets: 1,
},
{
namespace: "ns1",
selector: "metadata.name=foo,metadata.namespace=ns1",
expectedSecrets: 1,
},
{
namespace: "ns1",
selector: "metadata.name=foo,metadata.namespace=ns2",
expectedSecrets: 0,
},
{
namespace: "ns1",
selector: "metadata.name=foo,metadata.namespace=",
expectedSecrets: 0,
},
}
for _, tc := range testcases {
opts := metav1.ListOptions{
FieldSelector: tc.selector,
}
secrets, err := clientSet.CoreV1().Secrets(tc.namespace).List(opts)
if err != nil {
t.Errorf("%s: Unexpected error: %v", tc.selector, err)
}
if len(secrets.Items) != tc.expectedSecrets {
t.Errorf("%s: Unexpected number of secrets: %d, expected: %d", tc.selector, len(secrets.Items), tc.expectedSecrets)
}
}
}