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policy/v2: validate autogroup:interet only in dst (#2552)
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commit
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@ -382,13 +382,13 @@ func (p Prefix) Resolve(_ *Policy, _ types.Users, nodes types.Nodes) (*netipx.IP
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type AutoGroup string
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const (
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AutoGroupInternet = "autogroup:internet"
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AutoGroupInternet AutoGroup = "autogroup:internet"
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)
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var autogroups = []string{AutoGroupInternet}
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var autogroups = []AutoGroup{AutoGroupInternet}
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func (ag AutoGroup) Validate() error {
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if slices.Contains(autogroups, string(ag)) {
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if slices.Contains(autogroups, ag) {
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return nil
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}
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@ -412,6 +412,14 @@ func (ag AutoGroup) Resolve(_ *Policy, _ types.Users, _ types.Nodes) (*netipx.IP
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return nil, nil
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}
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func (ag *AutoGroup) Is(c AutoGroup) bool {
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if ag == nil {
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return false
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}
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return *ag == c
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}
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type Alias interface {
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Validate() error
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UnmarshalJSON([]byte) error
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@ -928,6 +936,32 @@ func (p *Policy) validate() error {
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if !p.Hosts.exist(*h) {
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errs = append(errs, fmt.Errorf(`Host %q is not defined in the Policy, please define or remove the reference to it`, *h))
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}
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case *AutoGroup:
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ag := src.(*AutoGroup)
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if ag.Is(AutoGroupInternet) {
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errs = append(errs, fmt.Errorf(`"autogroup:internet" used in source, it can only be used in ACL destinations`))
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}
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}
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}
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}
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for _, ssh := range p.SSHs {
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for _, src := range ssh.Sources {
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switch src.(type) {
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case *AutoGroup:
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ag := src.(*AutoGroup)
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if ag.Is(AutoGroupInternet) {
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errs = append(errs, fmt.Errorf(`"autogroup:internet" used in SSH source, it can only be used in ACL destinations`))
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}
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}
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}
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for _, dst := range ssh.Destinations {
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switch dst.(type) {
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case *AutoGroup:
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ag := dst.(*AutoGroup)
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if ag.Is(AutoGroupInternet) {
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errs = append(errs, fmt.Errorf(`"autogroup:internet" used in SSH destination, it can only be used in ACL destinations`))
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}
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}
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}
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}
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@ -420,6 +420,97 @@ func TestUnmarshalPolicy(t *testing.T) {
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},
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},
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},
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{
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name: "autogroup:internet-in-dst-allowed",
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input: `
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{
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"acls": [
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{
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"action": "accept",
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"src": [
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"10.0.0.1"
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],
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"dst": [
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"autogroup:internet:*"
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]
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}
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]
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}
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`,
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want: &Policy{
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ACLs: []ACL{
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{
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Action: "accept",
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Sources: Aliases{
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pp("10.0.0.1/32"),
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},
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Destinations: []AliasWithPorts{
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{
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Alias: ptr.To(AutoGroup("autogroup:internet")),
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Ports: []tailcfg.PortRange{tailcfg.PortRangeAny},
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},
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},
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},
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},
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},
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},
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{
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name: "autogroup:internet-in-src-not-allowed",
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input: `
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{
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"acls": [
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{
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"action": "accept",
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"src": [
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"autogroup:internet"
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],
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"dst": [
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"10.0.0.1:*"
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]
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}
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]
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}
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`,
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wantErr: `"autogroup:internet" used in source, it can only be used in ACL destinations`,
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},
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{
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name: "autogroup:internet-in-ssh-src-not-allowed",
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input: `
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{
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"ssh": [
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{
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"action": "accept",
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"src": [
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"autogroup:internet"
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],
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"dst": [
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"tag:test"
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]
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}
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]
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}
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`,
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wantErr: `"autogroup:internet" used in SSH source, it can only be used in ACL destinations`,
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},
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{
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name: "autogroup:internet-in-ssh-dst-not-allowed",
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input: `
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{
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"ssh": [
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{
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"action": "accept",
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"src": [
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"tag:test"
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],
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"dst": [
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"autogroup:internet"
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]
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}
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]
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}
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`,
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wantErr: `"autogroup:internet" used in SSH destination, it can only be used in ACL destinations`,
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},
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}
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cmps := append(util.Comparers, cmp.Comparer(func(x, y Prefix) bool {
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