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validation.go
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validation.go
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package validation
import (
"fmt"
"strings"
kapi "k8s.io/kubernetes/pkg/api"
unversionedvalidation "k8s.io/kubernetes/pkg/api/unversioned/validation"
"k8s.io/kubernetes/pkg/api/validation"
"k8s.io/kubernetes/pkg/api/validation/path"
kvalidation "k8s.io/kubernetes/pkg/util/validation"
"k8s.io/kubernetes/pkg/util/validation/field"
authorizationapi "github.com/openshift/origin/pkg/authorization/api"
uservalidation "github.com/openshift/origin/pkg/user/api/validation"
)
func ValidateSelfSubjectRulesReview(review *authorizationapi.SelfSubjectRulesReview) field.ErrorList {
return field.ErrorList{}
}
func ValidateSubjectRulesReview(rules *authorizationapi.SubjectRulesReview) field.ErrorList {
allErrs := field.ErrorList{}
if len(rules.Spec.Groups) == 0 && len(rules.Spec.User) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("user"), "at least one of user and groups must be specified"))
}
return allErrs
}
func validateCommonAccessReviewAction(fldPath *field.Path, action *authorizationapi.Action) field.ErrorList {
var allErrs field.ErrorList
if action.IsNonResourceURL {
if len(action.Path) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("path"), ""))
}
if len(action.Resource) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("resource"), action.Resource, "resource may not be specified with non resource URLs"))
}
if len(action.Group) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("group"), action.Group, "group may not be specified with non resource URLs"))
}
if len(action.Version) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("version"), action.Version, "version may not be specified with non resource URLs"))
}
if len(action.ResourceName) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("resourceName"), action.ResourceName, "resourceName may not be specified with non resource URLs"))
}
if len(action.Namespace) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("namespace"), action.Namespace, "namespace may not be specified with non resource URLs"))
}
if action.Content != nil {
allErrs = append(allErrs, field.Invalid(fldPath.Child("content"), nil, "content may not be specified with non resource URLs"))
}
} else {
if len(action.Resource) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("resource"), ""))
}
}
return allErrs
}
func ValidateSubjectAccessReview(review *authorizationapi.SubjectAccessReview) field.ErrorList {
allErrs := field.ErrorList{}
if len(review.Action.Verb) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("verb"), ""))
}
allErrs = append(allErrs, validateCommonAccessReviewAction(nil, &review.Action)...)
return allErrs
}
func ValidateResourceAccessReview(review *authorizationapi.ResourceAccessReview) field.ErrorList {
allErrs := field.ErrorList{}
if len(review.Action.Verb) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("verb"), ""))
}
allErrs = append(allErrs, validateCommonAccessReviewAction(nil, &review.Action)...)
return allErrs
}
func ValidateLocalSubjectAccessReview(review *authorizationapi.LocalSubjectAccessReview) field.ErrorList {
allErrs := field.ErrorList{}
if len(review.Action.Verb) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("verb"), ""))
}
allErrs = append(allErrs, validateCommonAccessReviewAction(nil, &review.Action)...)
return allErrs
}
func ValidateLocalResourceAccessReview(review *authorizationapi.LocalResourceAccessReview) field.ErrorList {
allErrs := field.ErrorList{}
if len(review.Action.Verb) == 0 {
allErrs = append(allErrs, field.Required(field.NewPath("verb"), ""))
}
allErrs = append(allErrs, validateCommonAccessReviewAction(nil, &review.Action)...)
return allErrs
}
func ValidatePolicyName(name string, prefix bool) []string {
if reasons := path.ValidatePathSegmentName(name, prefix); len(reasons) != 0 {
return reasons
}
if name != authorizationapi.PolicyName {
return []string{"name must be " + authorizationapi.PolicyName}
}
return nil
}
func ValidateLocalPolicy(policy *authorizationapi.Policy) field.ErrorList {
return ValidatePolicy(policy, true)
}
func ValidateLocalPolicyUpdate(policy *authorizationapi.Policy, oldPolicy *authorizationapi.Policy) field.ErrorList {
return ValidatePolicyUpdate(policy, oldPolicy, true)
}
func ValidateClusterPolicy(policy *authorizationapi.ClusterPolicy) field.ErrorList {
return ValidatePolicy(authorizationapi.ToPolicy(policy), false)
}
func ValidateClusterPolicyUpdate(policy *authorizationapi.ClusterPolicy, oldPolicy *authorizationapi.ClusterPolicy) field.ErrorList {
return ValidatePolicyUpdate(authorizationapi.ToPolicy(policy), authorizationapi.ToPolicy(oldPolicy), false)
}
func ValidatePolicy(policy *authorizationapi.Policy, isNamespaced bool) field.ErrorList {
return validatePolicy(policy, isNamespaced, false)
}
func validatePolicy(policy *authorizationapi.Policy, isNamespaced, skipRoleValidation bool) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&policy.ObjectMeta, isNamespaced, ValidatePolicyName, field.NewPath("metadata"))
rolePath := field.NewPath("roles")
for roleKey, role := range policy.Roles {
keyPath := rolePath.Key(roleKey)
if role == nil {
allErrs = append(allErrs, field.Required(keyPath, ""))
}
if roleKey != role.Name {
allErrs = append(allErrs, field.Invalid(keyPath.Child("metadata", "name"), role.Name, "must be "+roleKey))
}
if !skipRoleValidation {
allErrs = append(allErrs, validateRole(role, isNamespaced, keyPath)...) // policy creation validation is more strict
}
}
return allErrs
}
func ValidatePolicyUpdate(policy *authorizationapi.Policy, oldPolicy *authorizationapi.Policy, isNamespaced bool) field.ErrorList {
// We skip role validation here because we handle it below
// It needs to based on if the role is an existing one vs. a new one
allErrs := validatePolicy(policy, isNamespaced, true)
allErrs = append(allErrs, validation.ValidateObjectMetaUpdate(&policy.ObjectMeta, &oldPolicy.ObjectMeta, field.NewPath("metadata"))...)
rolePath := field.NewPath("roles")
for roleKey, role := range policy.Roles {
if role == nil {
continue // these cause errors in validatePolicy so we do not worry about them
}
keyPath := rolePath.Key(roleKey)
oldRole, isExistingRole := oldPolicy.Roles[roleKey]
if isExistingRole {
allErrs = append(allErrs, validateRoleUpdate(role, oldRole, isNamespaced, keyPath)...)
} else {
allErrs = append(allErrs, validateRole(role, isNamespaced, keyPath)...) // new roles have stricter validation
}
}
return allErrs
}
func PolicyBindingNameValidator(policyRefNamespace string) validation.ValidateNameFunc {
return func(name string, prefix bool) []string {
if reasons := path.ValidatePathSegmentName(name, prefix); len(reasons) != 0 {
return reasons
}
if name != authorizationapi.GetPolicyBindingName(policyRefNamespace) {
return []string{"name must be " + authorizationapi.GetPolicyBindingName(policyRefNamespace)}
}
return nil
}
}
func ValidateLocalPolicyBinding(policy *authorizationapi.PolicyBinding) field.ErrorList {
return ValidatePolicyBinding(policy, true)
}
func ValidateLocalPolicyBindingUpdate(policy *authorizationapi.PolicyBinding, oldPolicyBinding *authorizationapi.PolicyBinding) field.ErrorList {
return ValidatePolicyBindingUpdate(policy, oldPolicyBinding, true)
}
func ValidateClusterPolicyBinding(policy *authorizationapi.ClusterPolicyBinding) field.ErrorList {
return ValidatePolicyBinding(authorizationapi.ToPolicyBinding(policy), false)
}
func ValidateClusterPolicyBindingUpdate(policy *authorizationapi.ClusterPolicyBinding, oldPolicyBinding *authorizationapi.ClusterPolicyBinding) field.ErrorList {
return ValidatePolicyBindingUpdate(authorizationapi.ToPolicyBinding(policy), authorizationapi.ToPolicyBinding(oldPolicyBinding), false)
}
func ValidatePolicyBinding(policyBinding *authorizationapi.PolicyBinding, isNamespaced bool) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&policyBinding.ObjectMeta, isNamespaced, PolicyBindingNameValidator(policyBinding.PolicyRef.Namespace), field.NewPath("metadata"))
if !isNamespaced {
if len(policyBinding.PolicyRef.Namespace) > 0 {
allErrs = append(allErrs, field.Invalid(field.NewPath("policyRef", "namespace"), policyBinding.PolicyRef.Namespace, "may not reference another namespace"))
}
}
roleBindingsPath := field.NewPath("roleBindings")
for roleBindingKey, roleBinding := range policyBinding.RoleBindings {
keyPath := roleBindingsPath.Key(roleBindingKey)
if roleBinding == nil {
allErrs = append(allErrs, field.Required(keyPath, ""))
}
if roleBinding.RoleRef.Namespace != policyBinding.PolicyRef.Namespace {
allErrs = append(allErrs, field.Invalid(keyPath.Child("roleRef", "namespace"), policyBinding.PolicyRef.Namespace, "must be "+policyBinding.PolicyRef.Namespace))
}
if roleBindingKey != roleBinding.Name {
allErrs = append(allErrs, field.Invalid(keyPath.Child("metadata", "name"), roleBinding.Name, "must be "+roleBindingKey))
}
allErrs = append(allErrs, validateRoleBinding(roleBinding, isNamespaced, keyPath)...)
}
return allErrs
}
func ValidatePolicyBindingUpdate(policyBinding *authorizationapi.PolicyBinding, oldPolicyBinding *authorizationapi.PolicyBinding, isNamespaced bool) field.ErrorList {
allErrs := ValidatePolicyBinding(policyBinding, isNamespaced)
allErrs = append(allErrs, validation.ValidateObjectMetaUpdate(&policyBinding.ObjectMeta, &oldPolicyBinding.ObjectMeta, field.NewPath("metadata"))...)
if oldPolicyBinding.PolicyRef.Namespace != policyBinding.PolicyRef.Namespace {
allErrs = append(allErrs, field.Invalid(field.NewPath("policyRef", "namespace"), policyBinding.PolicyRef.Namespace, "cannot change policyRef"))
}
return allErrs
}
func ValidateLocalRole(policy *authorizationapi.Role) field.ErrorList {
return ValidateRole(policy, true)
}
func ValidateLocalRoleUpdate(policy *authorizationapi.Role, oldRole *authorizationapi.Role) field.ErrorList {
return ValidateRoleUpdate(policy, oldRole, true, nil)
}
func ValidateClusterRole(policy *authorizationapi.ClusterRole) field.ErrorList {
return ValidateRole(authorizationapi.ToRole(policy), false)
}
func ValidateClusterRoleUpdate(policy *authorizationapi.ClusterRole, oldRole *authorizationapi.ClusterRole) field.ErrorList {
return ValidateRoleUpdate(authorizationapi.ToRole(policy), authorizationapi.ToRole(oldRole), false, nil)
}
func ValidateRole(role *authorizationapi.Role, isNamespaced bool) field.ErrorList {
return validateRole(role, isNamespaced, nil)
}
func validateRole(role *authorizationapi.Role, isNamespaced bool, fldPath *field.Path) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&role.ObjectMeta, isNamespaced, path.ValidatePathSegmentName, fldPath.Child("metadata"))
rulesPath := fldPath.Child("rules")
for i, rule := range role.Rules {
if rule.AttributeRestrictions != nil {
allErrs = append(allErrs, field.Invalid(rulesPath.Index(i).Child("attributeRestrictions"), rule.AttributeRestrictions, "must be null"))
}
}
return allErrs
}
func ValidateRoleUpdate(role *authorizationapi.Role, oldRole *authorizationapi.Role, isNamespaced bool, fldPath *field.Path) field.ErrorList {
allErrs := validateRoleUpdate(role, oldRole, isNamespaced, fldPath)
// We can use ValidateObjectMetaUpdate here because we know that we are validating a single role, and not a role embedded inside a policy object
allErrs = append(allErrs, validation.ValidateObjectMetaUpdate(&role.ObjectMeta, &oldRole.ObjectMeta, fldPath.Child("metadata"))...)
return allErrs
}
func validateRoleUpdate(role *authorizationapi.Role, oldRole *authorizationapi.Role, isNamespaced bool, fldPath *field.Path) field.ErrorList {
// We use ValidateObjectMeta here because roles embedded inside of policy objects are not guaranteed to
// have a resource version and thus will fail the policy's validation if ValidateObjectMetaUpdate was used
allErrs := validation.ValidateObjectMeta(&role.ObjectMeta, isNamespaced, path.ValidatePathSegmentName, fldPath.Child("metadata"))
rulesPath := fldPath.Child("rules")
for i, rule := range role.Rules {
if rule.AttributeRestrictions != nil && isNewRule(rule, oldRole) {
allErrs = append(allErrs, field.Invalid(rulesPath.Index(i).Child("attributeRestrictions"), rule.AttributeRestrictions, "must be null"))
}
}
return allErrs
}
func isNewRule(rule authorizationapi.PolicyRule, oldRole *authorizationapi.Role) bool {
for _, r := range oldRole.Rules {
if r.AttributeRestrictions != nil && kapi.Semantic.DeepEqual(rule, r) { // only do expensive comparision against rules that have attribute restrictions
return false
}
}
return true
}
func ValidateLocalRoleBinding(policy *authorizationapi.RoleBinding) field.ErrorList {
return ValidateRoleBinding(policy, true)
}
func ValidateLocalRoleBindingUpdate(policy *authorizationapi.RoleBinding, oldRoleBinding *authorizationapi.RoleBinding) field.ErrorList {
return ValidateRoleBindingUpdate(policy, oldRoleBinding, true)
}
func ValidateClusterRoleBinding(policy *authorizationapi.ClusterRoleBinding) field.ErrorList {
return ValidateRoleBinding(authorizationapi.ToRoleBinding(policy), false)
}
func ValidateClusterRoleBindingUpdate(policy *authorizationapi.ClusterRoleBinding, oldRoleBinding *authorizationapi.ClusterRoleBinding) field.ErrorList {
return ValidateRoleBindingUpdate(authorizationapi.ToRoleBinding(policy), authorizationapi.ToRoleBinding(oldRoleBinding), false)
}
func ValidateRoleBinding(roleBinding *authorizationapi.RoleBinding, isNamespaced bool) field.ErrorList {
return validateRoleBinding(roleBinding, isNamespaced, nil)
}
func validateRoleBinding(roleBinding *authorizationapi.RoleBinding, isNamespaced bool, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, validation.ValidateObjectMeta(&roleBinding.ObjectMeta, isNamespaced, path.ValidatePathSegmentName, fldPath.Child("metadata"))...)
// roleRef namespace is empty when referring to global policy.
if (len(roleBinding.RoleRef.Namespace) > 0) && len(kvalidation.IsDNS1123Subdomain(roleBinding.RoleRef.Namespace)) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("roleRef", "namespace"), roleBinding.RoleRef.Namespace, "roleRef.namespace must be a valid subdomain"))
}
if len(roleBinding.RoleRef.Name) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("roleRef", "name"), ""))
} else {
if reasons := path.ValidatePathSegmentName(roleBinding.RoleRef.Name, false); len(reasons) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("roleRef", "name"), roleBinding.RoleRef.Name, strings.Join(reasons, ", ")))
}
}
subjectsPath := field.NewPath("subjects")
for i, subject := range roleBinding.Subjects {
allErrs = append(allErrs, validateRoleBindingSubject(subject, isNamespaced, subjectsPath.Index(i))...)
}
return allErrs
}
func validateRoleBindingSubject(subject kapi.ObjectReference, isNamespaced bool, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if len(subject.Name) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("name"), ""))
}
if len(subject.UID) != 0 {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("uid"), fmt.Sprintf("%v", subject.UID)))
}
if len(subject.APIVersion) != 0 {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("apiVersion"), subject.APIVersion))
}
if len(subject.ResourceVersion) != 0 {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("resourceVersion"), subject.ResourceVersion))
}
if len(subject.FieldPath) != 0 {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("fieldPath"), subject.FieldPath))
}
switch subject.Kind {
case authorizationapi.ServiceAccountKind:
if reasons := validation.ValidateServiceAccountName(subject.Name, false); len(subject.Name) > 0 && len(reasons) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), subject.Name, strings.Join(reasons, ", ")))
}
if !isNamespaced && len(subject.Namespace) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("namespace"), "Service account subjects for ClusterRoleBindings must have a namespace"))
}
case authorizationapi.UserKind:
if reasons := uservalidation.ValidateUserName(subject.Name, false); len(subject.Name) > 0 && len(reasons) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), subject.Name, strings.Join(reasons, ", ")))
}
case authorizationapi.GroupKind:
if reasons := uservalidation.ValidateGroupName(subject.Name, false); len(subject.Name) > 0 && len(reasons) != 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), subject.Name, strings.Join(reasons, ", ")))
}
case authorizationapi.SystemUserKind:
isValidSAName := len(validation.ValidateServiceAccountName(subject.Name, false)) == 0
isValidUserName := len(uservalidation.ValidateUserName(subject.Name, false)) == 0
if isValidSAName || isValidUserName {
allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), subject.Name, "conforms to User.name or ServiceAccount.name restrictions"))
}
case authorizationapi.SystemGroupKind:
if reasons := uservalidation.ValidateGroupName(subject.Name, false); len(subject.Name) > 0 && len(reasons) == 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("name"), subject.Name, "conforms to Group.name restrictions"))
}
default:
allErrs = append(allErrs, field.NotSupported(fldPath.Child("kind"), subject.Kind, []string{authorizationapi.ServiceAccountKind, authorizationapi.UserKind, authorizationapi.GroupKind, authorizationapi.SystemGroupKind, authorizationapi.SystemUserKind}))
}
return allErrs
}
func ValidateRoleBindingUpdate(roleBinding *authorizationapi.RoleBinding, oldRoleBinding *authorizationapi.RoleBinding, isNamespaced bool) field.ErrorList {
allErrs := ValidateRoleBinding(roleBinding, isNamespaced)
allErrs = append(allErrs, validation.ValidateObjectMetaUpdate(&roleBinding.ObjectMeta, &oldRoleBinding.ObjectMeta, field.NewPath("metadata"))...)
if oldRoleBinding.RoleRef != roleBinding.RoleRef {
allErrs = append(allErrs, field.Invalid(field.NewPath("roleRef"), roleBinding.RoleRef, "cannot change roleRef"))
}
return allErrs
}
func ValidateRoleBindingRestriction(rbr *authorizationapi.RoleBindingRestriction) field.ErrorList {
allErrs := validation.ValidateObjectMeta(&rbr.ObjectMeta, true,
validation.NameIsDNSSubdomain, field.NewPath("metadata"))
allErrs = append(allErrs,
ValidateRoleBindingRestrictionSpec(&rbr.Spec, field.NewPath("spec"))...)
return allErrs
}
func ValidateRoleBindingRestrictionUpdate(rbr, old *authorizationapi.RoleBindingRestriction) field.ErrorList {
allErrs := ValidateRoleBindingRestriction(rbr)
allErrs = append(allErrs, validation.ValidateObjectMetaUpdate(&rbr.ObjectMeta,
&old.ObjectMeta, field.NewPath("metadata"))...)
return allErrs
}
func ValidateRoleBindingRestrictionSpec(spec *authorizationapi.RoleBindingRestrictionSpec, fld *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
const invalidMsg = `must specify exactly one of userrestriction, grouprestriction, or serviceaccountrestriction`
if spec.UserRestriction != nil {
if spec.GroupRestriction != nil {
allErrs = append(allErrs, field.Invalid(fld.Child("grouprestriction"),
"both userrestriction and grouprestriction specified", invalidMsg))
}
if spec.ServiceAccountRestriction != nil {
allErrs = append(allErrs,
field.Invalid(fld.Child("serviceaccountrestriction"),
"both userrestriction and serviceaccountrestriction specified", invalidMsg))
}
} else if spec.GroupRestriction != nil {
if spec.ServiceAccountRestriction != nil {
allErrs = append(allErrs,
field.Invalid(fld.Child("serviceaccountrestriction"),
"both grouprestriction and serviceaccountrestriction specified", invalidMsg))
}
} else if spec.ServiceAccountRestriction == nil {
allErrs = append(allErrs, field.Required(fld.Child("userrestriction"),
invalidMsg))
}
if spec.UserRestriction != nil {
allErrs = append(allErrs, ValidateRoleBindingRestrictionUser(spec.UserRestriction, fld.Child("userrestriction"))...)
}
if spec.GroupRestriction != nil {
allErrs = append(allErrs, ValidateRoleBindingRestrictionGroup(spec.GroupRestriction, fld.Child("grouprestriction"))...)
}
if spec.ServiceAccountRestriction != nil {
allErrs = append(allErrs, ValidateRoleBindingRestrictionServiceAccount(spec.ServiceAccountRestriction, fld.Child("serviceaccountrestriction"))...)
}
return allErrs
}
func ValidateRoleBindingRestrictionUser(user *authorizationapi.UserRestriction, fld *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
const invalidMsg = `must specify at least one user, group, or label selector`
if !(len(user.Users) > 0 || len(user.Groups) > 0 || len(user.Selectors) > 0) {
allErrs = append(allErrs, field.Required(fld.Child("users"), invalidMsg))
}
for i, selector := range user.Selectors {
allErrs = append(allErrs,
unversionedvalidation.ValidateLabelSelector(&selector,
fld.Child("selector").Index(i))...)
}
return allErrs
}
func ValidateRoleBindingRestrictionGroup(group *authorizationapi.GroupRestriction, fld *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
const invalidMsg = `must specify at least one group or label selector`
if !(len(group.Groups) > 0 || len(group.Selectors) > 0) {
allErrs = append(allErrs, field.Required(fld.Child("groups"), invalidMsg))
}
for i, selector := range group.Selectors {
allErrs = append(allErrs,
unversionedvalidation.ValidateLabelSelector(&selector,
fld.Child("selector").Index(i))...)
}
return allErrs
}
func ValidateRoleBindingRestrictionServiceAccount(sa *authorizationapi.ServiceAccountRestriction, fld *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
const invalidMsg = `must specify at least one service account or namespace`
if !(len(sa.ServiceAccounts) > 0 || len(sa.Namespaces) > 0) {
allErrs = append(allErrs,
field.Required(fld.Child("serviceaccounts"), invalidMsg))
}
return allErrs
}