mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-10 08:20:23 +00:00
414 lines
12 KiB
Go
414 lines
12 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 rbac
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
||
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
||
|
|
)
|
||
|
|
|
||
|
|
func RoleRefGroupKind(roleRef RoleRef) schema.GroupKind {
|
||
|
|
return schema.GroupKind{Group: roleRef.APIGroup, Kind: roleRef.Kind}
|
||
|
|
}
|
||
|
|
|
||
|
|
func VerbMatches(rule *PolicyRule, requestedVerb string) bool {
|
||
|
|
for _, ruleVerb := range rule.Verbs {
|
||
|
|
if ruleVerb == VerbAll {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
if ruleVerb == requestedVerb {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func APIGroupMatches(rule *PolicyRule, requestedGroup string) bool {
|
||
|
|
for _, ruleGroup := range rule.APIGroups {
|
||
|
|
if ruleGroup == APIGroupAll {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
if ruleGroup == requestedGroup {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func ResourceMatches(rule *PolicyRule, combinedRequestedResource, requestedSubresource string) bool {
|
||
|
|
for _, ruleResource := range rule.Resources {
|
||
|
|
// if everything is allowed, we match
|
||
|
|
if ruleResource == ResourceAll {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
// if we have an exact match, we match
|
||
|
|
if ruleResource == combinedRequestedResource {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
// We can also match a */subresource.
|
||
|
|
// if there isn't a subresource, then continue
|
||
|
|
if len(requestedSubresource) == 0 {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
// if the rule isn't in the format */subresource, then we don't match, continue
|
||
|
|
if len(ruleResource) == len(requestedSubresource)+2 &&
|
||
|
|
strings.HasPrefix(ruleResource, "*/") &&
|
||
|
|
strings.HasSuffix(ruleResource, requestedSubresource) {
|
||
|
|
return true
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func ResourceNameMatches(rule *PolicyRule, requestedName string) bool {
|
||
|
|
if len(rule.ResourceNames) == 0 {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, ruleName := range rule.ResourceNames {
|
||
|
|
if ruleName == requestedName {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func NonResourceURLMatches(rule *PolicyRule, requestedURL string) bool {
|
||
|
|
for _, ruleURL := range rule.NonResourceURLs {
|
||
|
|
if ruleURL == NonResourceAll {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
if ruleURL == requestedURL {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
if strings.HasSuffix(ruleURL, "*") && strings.HasPrefix(requestedURL, strings.TrimRight(ruleURL, "*")) {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// subjectsStrings returns users, groups, serviceaccounts, unknown for display purposes.
|
||
|
|
func SubjectsStrings(subjects []Subject) ([]string, []string, []string, []string) {
|
||
|
|
users := []string{}
|
||
|
|
groups := []string{}
|
||
|
|
sas := []string{}
|
||
|
|
others := []string{}
|
||
|
|
|
||
|
|
for _, subject := range subjects {
|
||
|
|
switch subject.Kind {
|
||
|
|
case ServiceAccountKind:
|
||
|
|
sas = append(sas, fmt.Sprintf("%s/%s", subject.Namespace, subject.Name))
|
||
|
|
|
||
|
|
case UserKind:
|
||
|
|
users = append(users, subject.Name)
|
||
|
|
|
||
|
|
case GroupKind:
|
||
|
|
groups = append(groups, subject.Name)
|
||
|
|
|
||
|
|
default:
|
||
|
|
others = append(others, fmt.Sprintf("%s/%s/%s", subject.Kind, subject.Namespace, subject.Name))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return users, groups, sas, others
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r PolicyRule) String() string {
|
||
|
|
return "PolicyRule" + r.CompactString()
|
||
|
|
}
|
||
|
|
|
||
|
|
// CompactString exposes a compact string representation for use in escalation error messages
|
||
|
|
func (r PolicyRule) CompactString() string {
|
||
|
|
formatStringParts := []string{}
|
||
|
|
formatArgs := []interface{}{}
|
||
|
|
if len(r.Resources) > 0 {
|
||
|
|
formatStringParts = append(formatStringParts, "Resources:%q")
|
||
|
|
formatArgs = append(formatArgs, r.Resources)
|
||
|
|
}
|
||
|
|
if len(r.NonResourceURLs) > 0 {
|
||
|
|
formatStringParts = append(formatStringParts, "NonResourceURLs:%q")
|
||
|
|
formatArgs = append(formatArgs, r.NonResourceURLs)
|
||
|
|
}
|
||
|
|
if len(r.ResourceNames) > 0 {
|
||
|
|
formatStringParts = append(formatStringParts, "ResourceNames:%q")
|
||
|
|
formatArgs = append(formatArgs, r.ResourceNames)
|
||
|
|
}
|
||
|
|
if len(r.APIGroups) > 0 {
|
||
|
|
formatStringParts = append(formatStringParts, "APIGroups:%q")
|
||
|
|
formatArgs = append(formatArgs, r.APIGroups)
|
||
|
|
}
|
||
|
|
if len(r.Verbs) > 0 {
|
||
|
|
formatStringParts = append(formatStringParts, "Verbs:%q")
|
||
|
|
formatArgs = append(formatArgs, r.Verbs)
|
||
|
|
}
|
||
|
|
formatString := "{" + strings.Join(formatStringParts, ", ") + "}"
|
||
|
|
return fmt.Sprintf(formatString, formatArgs...)
|
||
|
|
}
|
||
|
|
|
||
|
|
// +k8s:deepcopy-gen=false
|
||
|
|
// PolicyRuleBuilder let's us attach methods. A no-no for API types.
|
||
|
|
// We use it to construct rules in code. It's more compact than trying to write them
|
||
|
|
// out in a literal and allows us to perform some basic checking during construction
|
||
|
|
type PolicyRuleBuilder struct {
|
||
|
|
PolicyRule PolicyRule
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewRule(verbs ...string) *PolicyRuleBuilder {
|
||
|
|
return &PolicyRuleBuilder{
|
||
|
|
PolicyRule: PolicyRule{Verbs: sets.NewString(verbs...).List()},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *PolicyRuleBuilder) Groups(groups ...string) *PolicyRuleBuilder {
|
||
|
|
r.PolicyRule.APIGroups = combine(r.PolicyRule.APIGroups, groups)
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *PolicyRuleBuilder) Resources(resources ...string) *PolicyRuleBuilder {
|
||
|
|
r.PolicyRule.Resources = combine(r.PolicyRule.Resources, resources)
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *PolicyRuleBuilder) Names(names ...string) *PolicyRuleBuilder {
|
||
|
|
r.PolicyRule.ResourceNames = combine(r.PolicyRule.ResourceNames, names)
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *PolicyRuleBuilder) URLs(urls ...string) *PolicyRuleBuilder {
|
||
|
|
r.PolicyRule.NonResourceURLs = combine(r.PolicyRule.NonResourceURLs, urls)
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *PolicyRuleBuilder) RuleOrDie() PolicyRule {
|
||
|
|
ret, err := r.Rule()
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
return ret
|
||
|
|
}
|
||
|
|
|
||
|
|
func combine(s1, s2 []string) []string {
|
||
|
|
s := sets.NewString(s1...)
|
||
|
|
s.Insert(s2...)
|
||
|
|
return s.List()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *PolicyRuleBuilder) Rule() (PolicyRule, error) {
|
||
|
|
if len(r.PolicyRule.Verbs) == 0 {
|
||
|
|
return PolicyRule{}, fmt.Errorf("verbs are required: %#v", r.PolicyRule)
|
||
|
|
}
|
||
|
|
|
||
|
|
switch {
|
||
|
|
case len(r.PolicyRule.NonResourceURLs) > 0:
|
||
|
|
if len(r.PolicyRule.APIGroups) != 0 || len(r.PolicyRule.Resources) != 0 || len(r.PolicyRule.ResourceNames) != 0 {
|
||
|
|
return PolicyRule{}, fmt.Errorf("non-resource rule may not have apiGroups, resources, or resourceNames: %#v", r.PolicyRule)
|
||
|
|
}
|
||
|
|
case len(r.PolicyRule.Resources) > 0:
|
||
|
|
// resource rule may not have nonResourceURLs
|
||
|
|
|
||
|
|
if len(r.PolicyRule.APIGroups) == 0 {
|
||
|
|
// this a common bug
|
||
|
|
return PolicyRule{}, fmt.Errorf("resource rule must have apiGroups: %#v", r.PolicyRule)
|
||
|
|
}
|
||
|
|
// if resource names are set, then the verb must not be list, watch, create, or deletecollection
|
||
|
|
// since verbs are largely opaque, we don't want to accidentally prevent things like "impersonate", so
|
||
|
|
// we will backlist common mistakes, not whitelist acceptable options.
|
||
|
|
if len(r.PolicyRule.ResourceNames) != 0 {
|
||
|
|
illegalVerbs := []string{}
|
||
|
|
for _, verb := range r.PolicyRule.Verbs {
|
||
|
|
switch verb {
|
||
|
|
case "list", "watch", "create", "deletecollection":
|
||
|
|
illegalVerbs = append(illegalVerbs, verb)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if len(illegalVerbs) > 0 {
|
||
|
|
return PolicyRule{}, fmt.Errorf("verbs %v do not have names available: %#v", illegalVerbs, r.PolicyRule)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
return PolicyRule{}, fmt.Errorf("a rule must have either nonResourceURLs or resources: %#v", r.PolicyRule)
|
||
|
|
}
|
||
|
|
|
||
|
|
return r.PolicyRule, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// +k8s:deepcopy-gen=false
|
||
|
|
// ClusterRoleBindingBuilder let's us attach methods. A no-no for API types.
|
||
|
|
// We use it to construct bindings in code. It's more compact than trying to write them
|
||
|
|
// out in a literal.
|
||
|
|
type ClusterRoleBindingBuilder struct {
|
||
|
|
ClusterRoleBinding ClusterRoleBinding
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewClusterBinding(clusterRoleName string) *ClusterRoleBindingBuilder {
|
||
|
|
return &ClusterRoleBindingBuilder{
|
||
|
|
ClusterRoleBinding: ClusterRoleBinding{
|
||
|
|
ObjectMeta: metav1.ObjectMeta{Name: clusterRoleName},
|
||
|
|
RoleRef: RoleRef{
|
||
|
|
APIGroup: GroupName,
|
||
|
|
Kind: "ClusterRole",
|
||
|
|
Name: clusterRoleName,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *ClusterRoleBindingBuilder) Groups(groups ...string) *ClusterRoleBindingBuilder {
|
||
|
|
for _, group := range groups {
|
||
|
|
r.ClusterRoleBinding.Subjects = append(r.ClusterRoleBinding.Subjects, Subject{Kind: GroupKind, APIGroup: GroupName, Name: group})
|
||
|
|
}
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *ClusterRoleBindingBuilder) Users(users ...string) *ClusterRoleBindingBuilder {
|
||
|
|
for _, user := range users {
|
||
|
|
r.ClusterRoleBinding.Subjects = append(r.ClusterRoleBinding.Subjects, Subject{Kind: UserKind, APIGroup: GroupName, Name: user})
|
||
|
|
}
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *ClusterRoleBindingBuilder) SAs(namespace string, serviceAccountNames ...string) *ClusterRoleBindingBuilder {
|
||
|
|
for _, saName := range serviceAccountNames {
|
||
|
|
r.ClusterRoleBinding.Subjects = append(r.ClusterRoleBinding.Subjects, Subject{Kind: ServiceAccountKind, Namespace: namespace, Name: saName})
|
||
|
|
}
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *ClusterRoleBindingBuilder) BindingOrDie() ClusterRoleBinding {
|
||
|
|
ret, err := r.Binding()
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
return ret
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *ClusterRoleBindingBuilder) Binding() (ClusterRoleBinding, error) {
|
||
|
|
if len(r.ClusterRoleBinding.Subjects) == 0 {
|
||
|
|
return ClusterRoleBinding{}, fmt.Errorf("subjects are required: %#v", r.ClusterRoleBinding)
|
||
|
|
}
|
||
|
|
|
||
|
|
return r.ClusterRoleBinding, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// +k8s:deepcopy-gen=false
|
||
|
|
// RoleBindingBuilder let's us attach methods. It is similar to
|
||
|
|
// ClusterRoleBindingBuilder above.
|
||
|
|
type RoleBindingBuilder struct {
|
||
|
|
RoleBinding RoleBinding
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewRoleBinding creates a RoleBinding builder that can be used
|
||
|
|
// to define the subjects of a role binding. At least one of
|
||
|
|
// the `Groups`, `Users` or `SAs` method must be called before
|
||
|
|
// calling the `Binding*` methods.
|
||
|
|
func NewRoleBinding(roleName, namespace string) *RoleBindingBuilder {
|
||
|
|
return &RoleBindingBuilder{
|
||
|
|
RoleBinding: RoleBinding{
|
||
|
|
ObjectMeta: metav1.ObjectMeta{
|
||
|
|
Name: roleName,
|
||
|
|
Namespace: namespace,
|
||
|
|
},
|
||
|
|
RoleRef: RoleRef{
|
||
|
|
APIGroup: GroupName,
|
||
|
|
Kind: "Role",
|
||
|
|
Name: roleName,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewRoleBindingForClusterRole(roleName, namespace string) *RoleBindingBuilder {
|
||
|
|
return &RoleBindingBuilder{
|
||
|
|
RoleBinding: RoleBinding{
|
||
|
|
ObjectMeta: metav1.ObjectMeta{
|
||
|
|
Name: roleName,
|
||
|
|
Namespace: namespace,
|
||
|
|
},
|
||
|
|
RoleRef: RoleRef{
|
||
|
|
APIGroup: GroupName,
|
||
|
|
Kind: "ClusterRole",
|
||
|
|
Name: roleName,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Groups adds the specified groups as the subjects of the RoleBinding.
|
||
|
|
func (r *RoleBindingBuilder) Groups(groups ...string) *RoleBindingBuilder {
|
||
|
|
for _, group := range groups {
|
||
|
|
r.RoleBinding.Subjects = append(r.RoleBinding.Subjects, Subject{Kind: GroupKind, APIGroup: GroupName, Name: group})
|
||
|
|
}
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
// Users adds the specified users as the subjects of the RoleBinding.
|
||
|
|
func (r *RoleBindingBuilder) Users(users ...string) *RoleBindingBuilder {
|
||
|
|
for _, user := range users {
|
||
|
|
r.RoleBinding.Subjects = append(r.RoleBinding.Subjects, Subject{Kind: UserKind, APIGroup: GroupName, Name: user})
|
||
|
|
}
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
// SAs adds the specified service accounts as the subjects of the
|
||
|
|
// RoleBinding.
|
||
|
|
func (r *RoleBindingBuilder) SAs(namespace string, serviceAccountNames ...string) *RoleBindingBuilder {
|
||
|
|
for _, saName := range serviceAccountNames {
|
||
|
|
r.RoleBinding.Subjects = append(r.RoleBinding.Subjects, Subject{Kind: ServiceAccountKind, Namespace: namespace, Name: saName})
|
||
|
|
}
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
// BindingOrDie calls the binding method and panics if there is an error.
|
||
|
|
func (r *RoleBindingBuilder) BindingOrDie() RoleBinding {
|
||
|
|
ret, err := r.Binding()
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
return ret
|
||
|
|
}
|
||
|
|
|
||
|
|
// Binding builds and returns the RoleBinding API object from the builder
|
||
|
|
// object.
|
||
|
|
func (r *RoleBindingBuilder) Binding() (RoleBinding, error) {
|
||
|
|
if len(r.RoleBinding.Subjects) == 0 {
|
||
|
|
return RoleBinding{}, fmt.Errorf("subjects are required: %#v", r.RoleBinding)
|
||
|
|
}
|
||
|
|
|
||
|
|
return r.RoleBinding, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
type SortableRuleSlice []PolicyRule
|
||
|
|
|
||
|
|
func (s SortableRuleSlice) Len() int { return len(s) }
|
||
|
|
func (s SortableRuleSlice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
|
||
|
|
func (s SortableRuleSlice) Less(i, j int) bool {
|
||
|
|
return strings.Compare(s[i].String(), s[j].String()) < 0
|
||
|
|
}
|