129 lines
3.8 KiB
Go
129 lines
3.8 KiB
Go
/*
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*
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* Copyright 2020 The KubeSphere Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* /
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*/
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package authorizerfactory
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import (
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"context"
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"github.com/open-policy-agent/opa/rego"
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"kubesphere.io/kubesphere/pkg/apiserver/authorization/authorizer"
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am2 "kubesphere.io/kubesphere/pkg/models/iam/am"
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)
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type opaAuthorizer struct {
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am am2.AccessManagementInterface
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}
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func (o *opaAuthorizer) Authorize(a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
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platformRole, err := o.am.GetPlatformRole(a.GetUser().GetName())
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if err != nil {
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return authorizer.DecisionDeny, "", err
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}
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// check platform role policy rules
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if a, r, e := o.roleAuthorize(platformRole, a); a == authorizer.DecisionAllow {
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return a, r, e
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}
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// it's not in cluster resource, permission denied
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// TODO declare implicit cluster info in request Info
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if a.GetCluster() == "" {
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return authorizer.DecisionDeny, "permission undefined", nil
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}
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clusterRole, err := o.am.GetClusterRole(a.GetCluster(), a.GetUser().GetName())
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if err != nil {
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return authorizer.DecisionDeny, "", err
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}
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// check cluster role policy rules
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if a, r, e := o.roleAuthorize(clusterRole, a); a == authorizer.DecisionAllow {
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return a, r, e
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}
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// it's not in cluster resource, permission denied
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if a.GetWorkspace() == "" && a.GetNamespace() == "" && a.GetDevopsProject() == "" {
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return authorizer.DecisionDeny, "permission undefined", nil
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}
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workspaceRole, err := o.am.GetWorkspaceRole(a.GetWorkspace(), a.GetUser().GetName())
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if err != nil {
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return authorizer.DecisionDeny, "", err
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}
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// check workspace role policy rules
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if a, r, e := o.roleAuthorize(workspaceRole, a); a == authorizer.DecisionAllow {
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return a, r, e
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}
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// it's not in workspace resource, permission denied
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if a.GetNamespace() == "" && a.GetDevopsProject() == "" {
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return authorizer.DecisionDeny, "permission undefined", nil
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}
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if a.GetNamespace() != "" {
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namespaceRole, err := o.am.GetNamespaceRole(a.GetNamespace(), a.GetUser().GetName())
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if err != nil {
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return authorizer.DecisionDeny, "", err
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}
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// check namespace role policy rules
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if a, r, e := o.roleAuthorize(namespaceRole, a); a == authorizer.DecisionAllow {
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return a, r, e
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}
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}
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if a.GetDevopsProject() != "" {
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devOpsRole, err := o.am.GetDevOpsRole(a.GetNamespace(), a.GetUser().GetName())
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if err != nil {
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return authorizer.DecisionDeny, "", err
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}
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// check devops role policy rules
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if a, r, e := o.roleAuthorize(devOpsRole, a); a == authorizer.DecisionAllow {
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return a, r, e
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}
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}
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return authorizer.DecisionDeny, "", nil
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}
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func (o *opaAuthorizer) roleAuthorize(role am2.Role, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
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query, err := rego.New(rego.Query("data.authz.allow"), rego.Module("authz.rego", role.GetRego())).PrepareForEval(context.Background())
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if err != nil {
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return authorizer.DecisionDeny, "", err
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}
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results, err := query.Eval(context.Background(), rego.EvalInput(a))
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if err != nil {
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return authorizer.DecisionDeny, "", err
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}
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if len(results) > 0 && results[0].Expressions[0].Value == true {
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return authorizer.DecisionAllow, "", nil
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}
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return authorizer.DecisionDeny, "permission undefined", nil
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}
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func NewOPAAuthorizer(am am2.AccessManagementInterface) *opaAuthorizer {
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return &opaAuthorizer{am: am}
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}
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