146 lines
4.3 KiB
Go
146 lines
4.3 KiB
Go
/*
|
|
*
|
|
* Copyright 2020 The KubeSphere 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 authorizerfactory
|
|
|
|
import (
|
|
"context"
|
|
"github.com/open-policy-agent/opa/rego"
|
|
"kubesphere.io/kubesphere/pkg/apiserver/authorization/authorizer"
|
|
"kubesphere.io/kubesphere/pkg/models/iam/am"
|
|
)
|
|
|
|
type opaAuthorizer struct {
|
|
am am.AccessManagementInterface
|
|
}
|
|
|
|
// Make decision by request attributes
|
|
func (o *opaAuthorizer) Authorize(attr authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
|
|
|
|
// Make decisions based on the authorization policy of different levels of roles
|
|
platformRole, err := o.am.GetPlatformRole(attr.GetUser().GetName())
|
|
if err != nil {
|
|
return authorizer.DecisionDeny, "", err
|
|
}
|
|
|
|
// check platform role policy rules
|
|
if authorized, reason, err = makeDecision(platformRole, attr); authorized == authorizer.DecisionAllow {
|
|
return authorized, reason, err
|
|
}
|
|
|
|
// it's not in cluster resource, permission denied
|
|
if attr.GetCluster() == "" {
|
|
return authorizer.DecisionDeny, "permission undefined", nil
|
|
}
|
|
|
|
clusterRole, err := o.am.GetClusterRole(attr.GetCluster(), attr.GetUser().GetName())
|
|
if err != nil {
|
|
return authorizer.DecisionDeny, "", err
|
|
}
|
|
|
|
// check cluster role policy rules
|
|
if a, r, e := makeDecision(clusterRole, attr); a == authorizer.DecisionAllow {
|
|
return a, r, e
|
|
}
|
|
|
|
// it's not in cluster resource, permission denied
|
|
if attr.GetWorkspace() == "" && attr.GetNamespace() == "" {
|
|
return authorizer.DecisionDeny, "permission undefined", nil
|
|
}
|
|
|
|
workspaceRole, err := o.am.GetWorkspaceRole(attr.GetWorkspace(), attr.GetUser().GetName())
|
|
if err != nil {
|
|
return authorizer.DecisionDeny, "", err
|
|
}
|
|
|
|
// check workspace role policy rules
|
|
if a, r, e := makeDecision(workspaceRole, attr); a == authorizer.DecisionAllow {
|
|
return a, r, e
|
|
}
|
|
|
|
// it's not in workspace resource, permission denied
|
|
if attr.GetNamespace() == "" {
|
|
return authorizer.DecisionDeny, "permission undefined", nil
|
|
}
|
|
|
|
if attr.GetNamespace() != "" {
|
|
namespaceRole, err := o.am.GetNamespaceRole(attr.GetCluster(), attr.GetNamespace(), attr.GetUser().GetName())
|
|
if err != nil {
|
|
return authorizer.DecisionDeny, "", err
|
|
}
|
|
// check namespace role policy rules
|
|
if a, r, e := makeDecision(namespaceRole, attr); a == authorizer.DecisionAllow {
|
|
return a, r, e
|
|
}
|
|
}
|
|
|
|
return authorizer.DecisionDeny, "", nil
|
|
}
|
|
|
|
// Make decision base on role
|
|
func makeDecision(role am.Role, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
|
|
|
|
// Call the rego.New function to create an object that can be prepared or evaluated
|
|
// After constructing a new rego.Rego object you can call PrepareForEval() to obtain an executable query
|
|
query, err := rego.New(rego.Query("data.authz.allow"), rego.Module("authz.rego", role.GetRego())).PrepareForEval(context.Background())
|
|
|
|
if err != nil {
|
|
return authorizer.DecisionDeny, "", err
|
|
}
|
|
|
|
// data example
|
|
//{
|
|
// "User": {
|
|
// "Name": "admin",
|
|
// "UID": "0",
|
|
// "Groups": [
|
|
// "admin"
|
|
// ],
|
|
// "Extra": null
|
|
// },
|
|
// "Verb": "list",
|
|
// "Cluster": "cluster1",
|
|
// "Workspace": "",
|
|
// "Namespace": "",
|
|
// "APIGroup": "",
|
|
// "APIVersion": "v1",
|
|
// "Resource": "nodes",
|
|
// "Subresource": "",
|
|
// "Name": "",
|
|
// "KubernetesRequest": true,
|
|
// "ResourceRequest": true,
|
|
// "Path": "/api/v1/nodes"
|
|
//}
|
|
// The policy decision is contained in the results returned by the Eval() call. You can inspect the decision and handle it accordingly.
|
|
results, err := query.Eval(context.Background(), rego.EvalInput(a))
|
|
|
|
if err != nil {
|
|
return authorizer.DecisionDeny, "", err
|
|
}
|
|
|
|
if len(results) > 0 && results[0].Expressions[0].Value == true {
|
|
return authorizer.DecisionAllow, "", nil
|
|
}
|
|
|
|
return authorizer.DecisionDeny, "permission undefined", nil
|
|
}
|
|
|
|
func NewOPAAuthorizer(am am.AccessManagementInterface) *opaAuthorizer {
|
|
return &opaAuthorizer{am: am}
|
|
}
|