mirror of https://github.com/k3s-io/k3s
68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
|
/*
|
||
|
|
Copyright 2018 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 path
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
||
|
|
"k8s.io/apiserver/pkg/authorization/authorizer"
|
||
|
|
)
|
||
|
|
|
||
|
|
// NewAuthorizer returns an authorizer which accepts a given set of paths.
|
||
|
|
// Each path is either a fully matching path or it ends in * in case a prefix match is done. A leading / is optional.
|
||
|
|
func NewAuthorizer(alwaysAllowPaths []string) (authorizer.Authorizer, error) {
|
||
|
|
var prefixes []string
|
||
|
|
paths := sets.NewString()
|
||
|
|
for _, p := range alwaysAllowPaths {
|
||
|
|
p = strings.TrimPrefix(p, "/")
|
||
|
|
if len(p) == 0 {
|
||
|
|
// matches "/"
|
||
|
|
paths.Insert(p)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if strings.ContainsRune(p[:len(p)-1], '*') {
|
||
|
|
return nil, fmt.Errorf("only trailing * allowed in %q", p)
|
||
|
|
}
|
||
|
|
if strings.HasSuffix(p, "*") {
|
||
|
|
prefixes = append(prefixes, p[:len(p)-1])
|
||
|
|
} else {
|
||
|
|
paths.Insert(p)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return authorizer.AuthorizerFunc(func(a authorizer.Attributes) (authorizer.Decision, string, error) {
|
||
|
|
if a.IsResourceRequest() {
|
||
|
|
return authorizer.DecisionNoOpinion, "", nil
|
||
|
|
}
|
||
|
|
|
||
|
|
pth := strings.TrimPrefix(a.GetPath(), "/")
|
||
|
|
if paths.Has(pth) {
|
||
|
|
return authorizer.DecisionAllow, "", nil
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, prefix := range prefixes {
|
||
|
|
if strings.HasPrefix(pth, prefix) {
|
||
|
|
return authorizer.DecisionAllow, "", nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return authorizer.DecisionNoOpinion, "", nil
|
||
|
|
}), nil
|
||
|
|
}
|