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podsecurity: added ValidatePodSecurityConfiguration
This commit is contained in:
Samuel Roth
parent
e67979eaf6
commit
a6b30e9629
@ -17,12 +17,111 @@ limitations under the License.
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package validation
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import (
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"strings"
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machinery "k8s.io/apimachinery/pkg/api/validation"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/pod-security-admission/admission/api"
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admissionapi "k8s.io/pod-security-admission/admission/api"
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"k8s.io/pod-security-admission/api"
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)
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func ValidatePodSecurityConfiguration(configuration *api.PodSecurityConfiguration) field.ErrorList {
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// ValidatePodSecurityConfiguration validates a given PodSecurityConfiguration.
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func ValidatePodSecurityConfiguration(configuration *admissionapi.PodSecurityConfiguration) field.ErrorList {
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allErrs := field.ErrorList{}
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// TODO: validate default levels and versions
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// validate defaults
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allErrs = append(allErrs, validateLevel(field.NewPath("defaults", "enforce"), configuration.Defaults.Enforce)...)
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allErrs = append(allErrs, validateVersion(field.NewPath("defaults", "enforce-version"), configuration.Defaults.EnforceVersion)...)
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allErrs = append(allErrs, validateLevel(field.NewPath("defaults", "warn"), configuration.Defaults.Warn)...)
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allErrs = append(allErrs, validateVersion(field.NewPath("defaults", "warn-version"), configuration.Defaults.WarnVersion)...)
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allErrs = append(allErrs, validateLevel(field.NewPath("defaults", "audit"), configuration.Defaults.Audit)...)
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allErrs = append(allErrs, validateVersion(field.NewPath("defaults", "audit-version"), configuration.Defaults.AuditVersion)...)
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// validate exemptions
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allErrs = append(allErrs, validateNamespaces(configuration)...)
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allErrs = append(allErrs, validateRuntimeClasses(configuration)...)
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allErrs = append(allErrs, validateUsernames(configuration)...)
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return allErrs
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}
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// validateLevel validates a level
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func validateLevel(p *field.Path, value string) field.ErrorList {
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errs := field.ErrorList{}
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_, err := api.ParseLevel(value)
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if err != nil {
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errs = append(errs, field.Invalid(p, value, err.Error()))
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}
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return errs
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}
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// validateVersion validates a version
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func validateVersion(p *field.Path, value string) field.ErrorList {
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errs := field.ErrorList{}
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_, err := api.ParseVersion(value)
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if err != nil {
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errs = append(errs, field.Invalid(p, value, err.Error()))
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}
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return errs
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}
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func validateNamespaces(configuration *admissionapi.PodSecurityConfiguration) field.ErrorList {
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errs := field.ErrorList{}
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validSet := sets.NewString()
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for i, ns := range configuration.Exemptions.Namespaces {
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err := machinery.ValidateNamespaceName(ns, false)
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if len(err) > 0 {
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path := field.NewPath("exemptions", "namespaces").Index(i)
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errs = append(errs, field.Invalid(path, ns, strings.Join(err, ", ")))
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continue
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}
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if validSet.Has(ns) {
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path := field.NewPath("exemptions", "namespaces").Index(i)
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errs = append(errs, field.Duplicate(path, ns))
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continue
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}
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validSet.Insert(ns)
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}
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return errs
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}
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func validateRuntimeClasses(configuration *admissionapi.PodSecurityConfiguration) field.ErrorList {
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errs := field.ErrorList{}
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validSet := sets.NewString()
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for i, rc := range configuration.Exemptions.RuntimeClasses {
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err := machinery.NameIsDNSSubdomain(rc, false)
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if len(err) > 0 {
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path := field.NewPath("exemptions", "runtimeClasses").Index(i)
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errs = append(errs, field.Invalid(path, rc, strings.Join(err, ", ")))
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continue
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}
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if validSet.Has(rc) {
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path := field.NewPath("exemptions", "runtimeClasses").Index(i)
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errs = append(errs, field.Duplicate(path, rc))
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continue
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}
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validSet.Insert(rc)
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}
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return errs
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}
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func validateUsernames(configuration *admissionapi.PodSecurityConfiguration) field.ErrorList {
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errs := field.ErrorList{}
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validSet := sets.NewString()
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for i, uname := range configuration.Exemptions.Usernames {
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if uname == "" {
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path := field.NewPath("exemptions", "usernames").Index(i)
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errs = append(errs, field.Invalid(path, uname, "username must not be empty"))
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continue
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}
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if validSet.Has(uname) {
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path := field.NewPath("exemptions", "usernames").Index(i)
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errs = append(errs, field.Duplicate(path, uname))
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continue
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}
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validSet.Insert(uname)
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}
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return errs
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}
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@ -15,3 +15,129 @@ limitations under the License.
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*/
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package validation
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import (
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"testing"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/pod-security-admission/admission/api"
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)
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type (
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test struct {
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configuration api.PodSecurityConfiguration
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expectedErrList field.ErrorList
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}
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)
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const (
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invalidValueUppercase = "TEST"
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invalidValueChars = "_&$%#"
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invalidValueTooLong = "testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttest"
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invalidValueEmpty = ""
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validValue = "testing"
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)
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func TestValidatePodSecurityConfiguration(t *testing.T) {
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tests := []test{
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// defaults
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{
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expectedErrList: field.ErrorList{
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field.Invalid(exemptionsPath("namespaces", 0), invalidValueEmpty, "..."),
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field.Invalid(exemptionsPath("namespaces", 1), invalidValueChars, "..."),
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field.Invalid(exemptionsPath("namespaces", 2), invalidValueUppercase, "..."),
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field.Invalid(exemptionsPath("namespaces", 3), invalidValueTooLong, "..."),
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field.Duplicate(exemptionsPath("namespaces", 5), validValue),
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field.Invalid(exemptionsPath("runtimeClasses", 0), invalidValueEmpty, "..."),
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field.Invalid(exemptionsPath("runtimeClasses", 1), invalidValueChars, "..."),
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field.Invalid(exemptionsPath("runtimeClasses", 2), invalidValueUppercase, "..."),
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field.Duplicate(exemptionsPath("runtimeClasses", 4), validValue),
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field.Invalid(exemptionsPath("usernames", 0), invalidValueEmpty, "..."),
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field.Duplicate(exemptionsPath("usernames", 2), validValue),
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},
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configuration: api.PodSecurityConfiguration{
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Defaults: api.PodSecurityDefaults{
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Enforce: "privileged",
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EnforceVersion: "v1.22",
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Audit: "baseline",
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AuditVersion: "v1.25",
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Warn: "restricted",
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WarnVersion: "latest",
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},
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Exemptions: api.PodSecurityExemptions{
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Namespaces: []string{
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invalidValueEmpty,
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invalidValueChars,
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invalidValueUppercase,
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invalidValueTooLong,
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validValue,
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validValue,
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},
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RuntimeClasses: []string{
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invalidValueEmpty,
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invalidValueChars,
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invalidValueUppercase,
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validValue,
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validValue,
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},
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Usernames: []string{
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invalidValueEmpty,
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validValue,
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validValue,
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},
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},
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},
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},
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{
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expectedErrList: field.ErrorList{
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field.Invalid(defaultsPath("enforce"), "baslein", "..."),
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field.Invalid(defaultsPath("enforce-version"), "v.122", "..."),
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field.Invalid(defaultsPath("warn"), "", "..."),
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field.Invalid(defaultsPath("warn-version"), "", "..."),
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field.Invalid(defaultsPath("audit"), "lorum", "..."),
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field.Invalid(defaultsPath("audit-version"), "ipsum", "..."),
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},
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configuration: api.PodSecurityConfiguration{
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Defaults: api.PodSecurityDefaults{
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Enforce: "baslein",
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EnforceVersion: "v.122",
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Audit: "lorum",
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AuditVersion: "ipsum",
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Warn: "",
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WarnVersion: "",
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},
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Exemptions: api.PodSecurityExemptions{},
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},
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},
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}
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for _, test := range tests {
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errList := ValidatePodSecurityConfiguration(&test.configuration)
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if len(errList) != len(test.expectedErrList) {
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t.Errorf("expected %d errs, got %d", len(test.expectedErrList), len(errList))
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}
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for i, expected := range test.expectedErrList {
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if expected.Type.String() != errList[i].Type.String() {
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t.Errorf("expected err type %s, got %s",
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expected.Type.String(),
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errList[i].Type.String())
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}
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if expected.BadValue != errList[i].BadValue {
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t.Errorf("expected bad value '%s', got '%s'",
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expected.BadValue,
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errList[i].BadValue)
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}
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}
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}
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}
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// defaultsPath returns the appropriate defaults path
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func defaultsPath(child string) *field.Path {
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return field.NewPath("defaults", child)
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}
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// exemptionsPath returns the appropriate defaults path
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func exemptionsPath(child string, i int) *field.Path {
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return field.NewPath("exemptions", child).Index(i)
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}
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