feat: add crd gen

Signed-off-by: runzexia <runzexia@yunify.com>

vendor/k8s.io/apiserver/pkg/audit/policy/checker.go

@@ -0,0 +1,219 @@
+/*
+Copyright 2017 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 policy
+
+import (
+	"strings"
+
+	"k8s.io/apiserver/pkg/apis/audit"
+	"k8s.io/apiserver/pkg/authorization/authorizer"
+)
+
+const (
+	// DefaultAuditLevel is the default level to audit at, if no policy rules are matched.
+	DefaultAuditLevel = audit.LevelNone
+)
+
+// Checker exposes methods for checking the policy rules.
+type Checker interface {
+	// Check the audit level for a request with the given authorizer attributes.
+	LevelAndStages(authorizer.Attributes) (audit.Level, []audit.Stage)
+}
+
+// NewChecker creates a new policy checker.
+func NewChecker(policy *audit.Policy) Checker {
+	for i, rule := range policy.Rules {
+		policy.Rules[i].OmitStages = unionStages(policy.OmitStages, rule.OmitStages)
+	}
+	return &policyChecker{*policy}
+}
+
+func unionStages(stageLists ...[]audit.Stage) []audit.Stage {
+	m := make(map[audit.Stage]bool)
+	for _, sl := range stageLists {
+		for _, s := range sl {
+			m[s] = true
+		}
+	}
+	result := make([]audit.Stage, 0, len(m))
+	for key := range m {
+		result = append(result, key)
+	}
+	return result
+}
+
+// FakeChecker creates a checker that returns a constant level for all requests (for testing).
+func FakeChecker(level audit.Level, stage []audit.Stage) Checker {
+	return &fakeChecker{level, stage}
+}
+
+type policyChecker struct {
+	audit.Policy
+}
+
+func (p *policyChecker) LevelAndStages(attrs authorizer.Attributes) (audit.Level, []audit.Stage) {
+	for _, rule := range p.Rules {
+		if ruleMatches(&rule, attrs) {
+			return rule.Level, rule.OmitStages
+		}
+	}
+	return DefaultAuditLevel, p.OmitStages
+}
+
+// Check whether the rule matches the request attrs.
+func ruleMatches(r *audit.PolicyRule, attrs authorizer.Attributes) bool {
+	user := attrs.GetUser()
+	if len(r.Users) > 0 {
+		if user == nil || !hasString(r.Users, user.GetName()) {
+			return false
+		}
+	}
+	if len(r.UserGroups) > 0 {
+		if user == nil {
+			return false
+		}
+		matched := false
+		for _, group := range user.GetGroups() {
+			if hasString(r.UserGroups, group) {
+				matched = true
+				break
+			}
+		}
+		if !matched {
+			return false
+		}
+	}
+	if len(r.Verbs) > 0 {
+		if !hasString(r.Verbs, attrs.GetVerb()) {
+			return false
+		}
+	}
+
+	if len(r.Namespaces) > 0 || len(r.Resources) > 0 {
+		return ruleMatchesResource(r, attrs)
+	}
+
+	if len(r.NonResourceURLs) > 0 {
+		return ruleMatchesNonResource(r, attrs)
+	}
+
+	return true
+}
+
+// Check whether the rule's non-resource URLs match the request attrs.
+func ruleMatchesNonResource(r *audit.PolicyRule, attrs authorizer.Attributes) bool {
+	if attrs.IsResourceRequest() {
+		return false
+	}
+
+	path := attrs.GetPath()
+	for _, spec := range r.NonResourceURLs {
+		if pathMatches(path, spec) {
+			return true
+		}
+	}
+
+	return false
+}
+
+// Check whether the path matches the path specification.
+func pathMatches(path, spec string) bool {
+	// Allow wildcard match
+	if spec == "*" {
+		return true
+	}
+	// Allow exact match
+	if spec == path {
+		return true
+	}
+	// Allow a trailing * subpath match
+	if strings.HasSuffix(spec, "*") && strings.HasPrefix(path, strings.TrimRight(spec, "*")) {
+		return true
+	}
+	return false
+}
+
+// Check whether the rule's resource fields match the request attrs.
+func ruleMatchesResource(r *audit.PolicyRule, attrs authorizer.Attributes) bool {
+	if !attrs.IsResourceRequest() {
+		return false
+	}
+
+	if len(r.Namespaces) > 0 {
+		if !hasString(r.Namespaces, attrs.GetNamespace()) { // Non-namespaced resources use the empty string.
+			return false
+		}
+	}
+	if len(r.Resources) == 0 {
+		return true
+	}
+
+	apiGroup := attrs.GetAPIGroup()
+	resource := attrs.GetResource()
+	subresource := attrs.GetSubresource()
+	combinedResource := resource
+	// If subresource, the resource in the policy must match "(resource)/(subresource)"
+	if subresource != "" {
+		combinedResource = resource + "/" + subresource
+	}
+
+	name := attrs.GetName()
+
+	for _, gr := range r.Resources {
+		if gr.Group == apiGroup {
+			if len(gr.Resources) == 0 {
+				return true
+			}
+			for _, res := range gr.Resources {
+				if len(gr.ResourceNames) == 0 || hasString(gr.ResourceNames, name) {
+					// match "*"
+					if res == combinedResource || res == "*" {
+						return true
+					}
+					// match "*/subresource"
+					if len(subresource) > 0 && strings.HasPrefix(res, "*/") && subresource == strings.TrimLeft(res, "*/") {
+						return true
+					}
+					// match "resource/*"
+					if strings.HasSuffix(res, "/*") && resource == strings.TrimRight(res, "/*") {
+						return true
+					}
+				}
+			}
+		}
+	}
+	return false
+}
+
+// Utility function to check whether a string slice contains a string.
+func hasString(slice []string, value string) bool {
+	for _, s := range slice {
+		if s == value {
+			return true
+		}
+	}
+	return false
+}
+
+type fakeChecker struct {
+	level audit.Level
+	stage []audit.Stage
+}
+
+func (f *fakeChecker) LevelAndStages(_ authorizer.Attributes) (audit.Level, []audit.Stage) {
+	return f.level, f.stage
+}

vendor/k8s.io/apiserver/pkg/audit/policy/dynamic.go

@@ -0,0 +1,54 @@
+/*
+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 policy
+
+import (
+	"k8s.io/api/auditregistration/v1alpha1"
+	"k8s.io/apiserver/pkg/apis/audit"
+	"k8s.io/apiserver/pkg/authorization/authorizer"
+)
+
+// ConvertDynamicPolicyToInternal constructs an internal policy type from a
+// v1alpha1 dynamic type
+func ConvertDynamicPolicyToInternal(p *v1alpha1.Policy) *audit.Policy {
+	stages := make([]audit.Stage, len(p.Stages))
+	for i, stage := range p.Stages {
+		stages[i] = audit.Stage(stage)
+	}
+	return &audit.Policy{
+		Rules: []audit.PolicyRule{
+			{
+				Level: audit.Level(p.Level),
+			},
+		},
+		OmitStages: InvertStages(stages),
+	}
+}
+
+// NewDynamicChecker returns a new dynamic policy checker
+func NewDynamicChecker() Checker {
+	return &dynamicPolicyChecker{}
+}
+
+type dynamicPolicyChecker struct{}
+
+// LevelAndStages returns returns a fixed level of the full event, this is so that the downstream policy
+// can be applied per sink.
+// TODO: this needs benchmarking before the API moves to beta to determine the effect this has on the apiserver
+func (d *dynamicPolicyChecker) LevelAndStages(authorizer.Attributes) (audit.Level, []audit.Stage) {
+	return audit.LevelRequestResponse, []audit.Stage{}
+}

vendor/k8s.io/apiserver/pkg/audit/policy/enforce.go

@@ -0,0 +1,53 @@
+/*
+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 policy
+
+import (
+	"fmt"
+
+	"k8s.io/apiserver/pkg/apis/audit"
+)
+
+// EnforcePolicy drops any part of the event that doesn't conform to a policy level
+// or omitStages and sets the event level accordingly
+func EnforcePolicy(event *audit.Event, level audit.Level, omitStages []audit.Stage) (*audit.Event, error) {
+	for _, stage := range omitStages {
+		if event.Stage == stage {
+			return nil, nil
+		}
+	}
+	return enforceLevel(event, level)
+}
+
+func enforceLevel(event *audit.Event, level audit.Level) (*audit.Event, error) {
+	switch level {
+	case audit.LevelMetadata:
+		event.Level = audit.LevelMetadata
+		event.ResponseObject = nil
+		event.RequestObject = nil
+	case audit.LevelRequest:
+		event.Level = audit.LevelRequest
+		event.ResponseObject = nil
+	case audit.LevelRequestResponse:
+		event.Level = audit.LevelRequestResponse
+	case audit.LevelNone:
+		return nil, nil
+	default:
+		return nil, fmt.Errorf("level unknown: %s", level)
+	}
+	return event, nil
+}

vendor/k8s.io/apiserver/pkg/audit/policy/reader.go

@@ -0,0 +1,90 @@
+/*
+Copyright 2017 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 policy
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	auditinternal "k8s.io/apiserver/pkg/apis/audit"
+	auditv1 "k8s.io/apiserver/pkg/apis/audit/v1"
+	auditv1alpha1 "k8s.io/apiserver/pkg/apis/audit/v1alpha1"
+	auditv1beta1 "k8s.io/apiserver/pkg/apis/audit/v1beta1"
+	"k8s.io/apiserver/pkg/apis/audit/validation"
+	"k8s.io/apiserver/pkg/audit"
+
+	"k8s.io/klog"
+)
+
+var (
+	apiGroupVersions = []schema.GroupVersion{
+		auditv1beta1.SchemeGroupVersion,
+		auditv1alpha1.SchemeGroupVersion,
+		auditv1.SchemeGroupVersion,
+	}
+	apiGroupVersionSet = map[schema.GroupVersion]bool{}
+)
+
+func init() {
+	for _, gv := range apiGroupVersions {
+		apiGroupVersionSet[gv] = true
+	}
+}
+
+func LoadPolicyFromFile(filePath string) (*auditinternal.Policy, error) {
+	if filePath == "" {
+		return nil, fmt.Errorf("file path not specified")
+	}
+	policyDef, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read file path %q: %+v", filePath, err)
+	}
+
+	ret, err := LoadPolicyFromBytes(policyDef)
+	if err != nil {
+		return nil, fmt.Errorf("%v: from file %v", err.Error(), filePath)
+	}
+
+	return ret, nil
+}
+
+func LoadPolicyFromBytes(policyDef []byte) (*auditinternal.Policy, error) {
+	policy := &auditinternal.Policy{}
+	decoder := audit.Codecs.UniversalDecoder(apiGroupVersions...)
+
+	_, gvk, err := decoder.Decode(policyDef, nil, policy)
+	if err != nil {
+		return nil, fmt.Errorf("failed decoding: %v", err)
+	}
+
+	// Ensure the policy file contained an apiVersion and kind.
+	if !apiGroupVersionSet[schema.GroupVersion{Group: gvk.Group, Version: gvk.Version}] {
+		return nil, fmt.Errorf("unknown group version field %v in policy", gvk)
+	}
+
+	if err := validation.ValidatePolicy(policy); err != nil {
+		return nil, err.ToAggregate()
+	}
+
+	policyCnt := len(policy.Rules)
+	if policyCnt == 0 {
+		return nil, fmt.Errorf("loaded illegal policy with 0 rules")
+	}
+	klog.V(4).Infof("Loaded %d audit policy rules", policyCnt)
+	return policy, nil
+}

vendor/k8s.io/apiserver/pkg/audit/policy/util.go

@@ -0,0 +1,68 @@
+/*
+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 policy
+
+import (
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/apiserver/pkg/apis/audit"
+)
+
+// AllStages returns all possible stages
+func AllStages() sets.String {
+	return sets.NewString(
+		audit.StageRequestReceived,
+		audit.StageResponseStarted,
+		audit.StageResponseComplete,
+		audit.StagePanic,
+	)
+}
+
+// AllLevels returns all possible levels
+func AllLevels() sets.String {
+	return sets.NewString(
+		string(audit.LevelNone),
+		string(audit.LevelMetadata),
+		string(audit.LevelRequest),
+		string(audit.LevelRequestResponse),
+	)
+}
+
+// InvertStages subtracts the given array of stages from all stages
+func InvertStages(stages []audit.Stage) []audit.Stage {
+	s := ConvertStagesToStrings(stages)
+	a := AllStages()
+	a.Delete(s...)
+	return ConvertStringSetToStages(a)
+}
+
+// ConvertStagesToStrings converts an array of stages to a string array
+func ConvertStagesToStrings(stages []audit.Stage) []string {
+	s := make([]string, len(stages))
+	for i, stage := range stages {
+		s[i] = string(stage)
+	}
+	return s
+}
+
+// ConvertStringSetToStages converts a string set to an array of stages
+func ConvertStringSetToStages(set sets.String) []audit.Stage {
+	stages := make([]audit.Stage, len(set))
+	for i, stage := range set.List() {
+		stages[i] = audit.Stage(stage)
+	}
+	return stages
+}