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check_capabilities_restricted_test.go
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check_capabilities_restricted_test.go
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/*
Copyright 2021 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 (
"testing"
corev1 "k8s.io/api/core/v1"
)
func TestCapabilitiesRestricted_1_25(t *testing.T) {
tests := []struct {
name string
pod *corev1.Pod
expectReason string
expectDetail string
allowed bool
}{
{
name: "multiple containers",
pod: &corev1.Pod{Spec: corev1.PodSpec{
Containers: []corev1.Container{
{Name: "a", SecurityContext: &corev1.SecurityContext{Capabilities: &corev1.Capabilities{Add: []corev1.Capability{"FOO", "BAR"}}}},
{Name: "b", SecurityContext: &corev1.SecurityContext{Capabilities: &corev1.Capabilities{Add: []corev1.Capability{"BAR", "BAZ"}}}},
{Name: "c", SecurityContext: &corev1.SecurityContext{Capabilities: &corev1.Capabilities{Add: []corev1.Capability{"NET_BIND_SERVICE", "CHOWN"}, Drop: []corev1.Capability{"ALL", "FOO"}}}},
}}},
expectReason: `unrestricted capabilities`,
expectDetail: `containers "a", "b" must set securityContext.capabilities.drop=["ALL"]; containers "a", "b", "c" must not include "BAR", "BAZ", "CHOWN", "FOO" in securityContext.capabilities.add`,
},
{
name: "windows pod, admit without checking capabilities",
pod: &corev1.Pod{Spec: corev1.PodSpec{
OS: &corev1.PodOS{Name: corev1.Windows},
Containers: []corev1.Container{
{Name: "a"},
}}},
allowed: true,
},
{
name: "linux pod, reject if security context is not set",
pod: &corev1.Pod{Spec: corev1.PodSpec{
OS: &corev1.PodOS{Name: corev1.Linux},
Containers: []corev1.Container{
{Name: "a"},
}}},
expectReason: `unrestricted capabilities`,
expectDetail: `container "a" must set securityContext.capabilities.drop=["ALL"]`,
allowed: false,
},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
result := capabilitiesRestricted_1_25(&tc.pod.ObjectMeta, &tc.pod.Spec)
if result.Allowed && !tc.allowed {
t.Fatal("expected disallowed")
}
if e, a := tc.expectReason, result.ForbiddenReason; e != a {
t.Errorf("expected\n%s\ngot\n%s", e, a)
}
if e, a := tc.expectDetail, result.ForbiddenDetail; e != a {
t.Errorf("expected\n%s\ngot\n%s", e, a)
}
})
}
}
func TestCapabilitiesRestricted_1_22(t *testing.T) {
tests := []struct {
name string
pod *corev1.Pod
expectReason string
expectDetail string
}{
{
name: "multiple containers",
pod: &corev1.Pod{Spec: corev1.PodSpec{
Containers: []corev1.Container{
{Name: "a", SecurityContext: &corev1.SecurityContext{Capabilities: &corev1.Capabilities{Add: []corev1.Capability{"FOO", "BAR"}}}},
{Name: "b", SecurityContext: &corev1.SecurityContext{Capabilities: &corev1.Capabilities{Add: []corev1.Capability{"BAR", "BAZ"}}}},
{Name: "c", SecurityContext: &corev1.SecurityContext{Capabilities: &corev1.Capabilities{Add: []corev1.Capability{"NET_BIND_SERVICE", "CHOWN"}, Drop: []corev1.Capability{"ALL", "FOO"}}}},
}}},
expectReason: `unrestricted capabilities`,
expectDetail: `containers "a", "b" must set securityContext.capabilities.drop=["ALL"]; containers "a", "b", "c" must not include "BAR", "BAZ", "CHOWN", "FOO" in securityContext.capabilities.add`,
},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
result := capabilitiesRestricted_1_22(&tc.pod.ObjectMeta, &tc.pod.Spec)
if result.Allowed {
t.Fatal("expected disallowed")
}
if e, a := tc.expectReason, result.ForbiddenReason; e != a {
t.Errorf("expected\n%s\ngot\n%s", e, a)
}
if e, a := tc.expectDetail, result.ForbiddenDetail; e != a {
t.Errorf("expected\n%s\ngot\n%s", e, a)
}
})
}
}