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Implement object deep inspector #8456
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| Copyright 2022 The Kubernetes Authors. | ||
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| 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 | ||
|
|
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| 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 inspector | ||
|
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| import ( | ||
| "fmt" | ||
|
|
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| networking "k8s.io/api/networking/v1" | ||
| ) | ||
|
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| // InspectIngress is used to do the deep inspection of an ingress object, walking through all | ||
| // of the spec fields and checking for matching strings and configurations that may represent | ||
| // an attempt to escape configs | ||
| func InspectIngress(ingress *networking.Ingress) error { | ||
| for _, rule := range ingress.Spec.Rules { | ||
| if rule.Host != "" { | ||
| if err := CheckRegex(rule.Host); err != nil { | ||
| return fmt.Errorf("invalid host in ingress %s/%s: %s", ingress.Namespace, ingress.Name, err) | ||
| } | ||
| } | ||
| if rule.HTTP != nil { | ||
| if err := inspectIngressRule(rule.HTTP); err != nil { | ||
| return fmt.Errorf("invalid rule in ingress %s/%s: %s", ingress.Namespace, ingress.Name, err) | ||
| } | ||
| } | ||
| } | ||
|
|
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| for _, tls := range ingress.Spec.TLS { | ||
| if err := CheckRegex(tls.SecretName); err != nil { | ||
| return fmt.Errorf("invalid secret in ingress %s/%s: %s", ingress.Namespace, ingress.Name, err) | ||
| } | ||
| for _, host := range tls.Hosts { | ||
| if err := CheckRegex(host); err != nil { | ||
| return fmt.Errorf("invalid host in ingress tls config %s/%s: %s", ingress.Namespace, ingress.Name, err) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| func inspectIngressRule(httprule *networking.HTTPIngressRuleValue) error { | ||
| for _, path := range httprule.Paths { | ||
| if err := CheckRegex(path.Path); err != nil { | ||
| return fmt.Errorf("invalid http path: %s", err) | ||
| } | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /* | ||
| Copyright 2022 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 inspector | ||
|
|
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| import ( | ||
| "testing" | ||
|
|
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| networking "k8s.io/api/networking/v1" | ||
| v1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| ) | ||
|
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| func makeSimpleIngress(hostname string, paths ...string) *networking.Ingress { | ||
|
|
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| newIngress := networking.Ingress{ | ||
| ObjectMeta: v1.ObjectMeta{ | ||
| Name: "test1", | ||
| Namespace: "default", | ||
| }, | ||
| Spec: networking.IngressSpec{ | ||
| Rules: []networking.IngressRule{ | ||
| { | ||
| Host: hostname, | ||
| IngressRuleValue: networking.IngressRuleValue{ | ||
| HTTP: &networking.HTTPIngressRuleValue{ | ||
| Paths: []networking.HTTPIngressPath{}, | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
|
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| prefix := networking.PathTypePrefix | ||
| for _, path := range paths { | ||
| newPath := networking.HTTPIngressPath{ | ||
| Path: path, | ||
| PathType: &prefix, | ||
| } | ||
| newIngress.Spec.Rules[0].IngressRuleValue.HTTP.Paths = append(newIngress.Spec.Rules[0].IngressRuleValue.HTTP.Paths, newPath) | ||
| } | ||
| return &newIngress | ||
| } | ||
|
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| func TestInspectIngress(t *testing.T) { | ||
| tests := []struct { | ||
| name string | ||
| hostname string | ||
| path []string | ||
| wantErr bool | ||
| }{ | ||
| { | ||
| name: "invalid-path-etc", | ||
| hostname: "invalid.etc.com", | ||
| path: []string{ | ||
| "/var/run/secrets", | ||
| "/mypage", | ||
| }, | ||
| wantErr: true, | ||
| }, | ||
| { | ||
| name: "invalid-path-etc", | ||
| hostname: "invalid.etc.com", | ||
| path: []string{ | ||
| "/etc/nginx", | ||
| }, | ||
| wantErr: true, | ||
| }, | ||
| { | ||
| name: "invalid-path-etc", | ||
| hostname: "invalid.etc.com", | ||
| path: []string{ | ||
| "/mypage", | ||
| }, | ||
| wantErr: false, | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| ingress := makeSimpleIngress(tt.hostname, tt.path...) | ||
| if err := InspectIngress(ingress); (err != nil) != tt.wantErr { | ||
| t.Errorf("InspectIngress() error = %v, wantErr %v", err, tt.wantErr) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
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Maybe the name can be changed