mirror of
https://github.com/tailscale/tailscale.git
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253 lines
7.1 KiB
Go
253 lines
7.1 KiB
Go
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tka
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import (
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"bytes"
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"encoding/hex"
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"errors"
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"testing"
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"github.com/fxamacker/cbor/v2"
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"github.com/google/go-cmp/cmp"
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"github.com/google/go-cmp/cmp/cmpopts"
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)
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func fromHex(in string) []byte {
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out, err := hex.DecodeString(in)
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if err != nil {
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panic(err)
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}
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return out
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}
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func hashFromHex(in string) *AUMHash {
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var out AUMHash
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copy(out[:], fromHex(in))
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return &out
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}
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func TestCloneState(t *testing.T) {
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tcs := []struct {
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Name string
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State State
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}{
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{
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"Empty",
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State{},
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},
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{
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"Key",
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State{
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Keys: []Key{{Kind: Key25519, Votes: 2, Public: []byte{5, 6, 7, 8}, Meta: map[string]string{"a": "b"}}},
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},
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},
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{
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"DisablementSecrets",
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State{
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DisablementSecrets: [][]byte{
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{1, 2, 3, 4},
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{5, 6, 7, 8},
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},
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},
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},
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}
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for _, tc := range tcs {
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t.Run(tc.Name, func(t *testing.T) {
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if diff := cmp.Diff(tc.State, tc.State.Clone()); diff != "" {
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t.Errorf("output state differs (-want, +got):\n%s", diff)
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}
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// Make sure the cloned State is the same even after
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// an encode + decode into + from CBOR.
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t.Run("cbor", func(t *testing.T) {
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out := bytes.NewBuffer(nil)
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encoder, err := cbor.CTAP2EncOptions().EncMode()
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if err != nil {
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t.Fatal(err)
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}
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if err := encoder.NewEncoder(out).Encode(tc.State.Clone()); err != nil {
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t.Fatal(err)
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}
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var decodedState State
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if err := cbor.Unmarshal(out.Bytes(), &decodedState); err != nil {
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t.Fatalf("Unmarshal failed: %v", err)
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}
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if diff := cmp.Diff(tc.State, decodedState); diff != "" {
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t.Errorf("decoded state differs (-want, +got):\n%s", diff)
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}
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})
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})
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}
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}
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func TestApplyUpdatesChain(t *testing.T) {
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intOne := uint(1)
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tcs := []struct {
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Name string
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Updates []AUM
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Start State
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End State
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}{
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{
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"AddKey",
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[]AUM{{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
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State{},
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State{
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Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
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LastAUMHash: hashFromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03"),
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},
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},
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{
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"RemoveKey",
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[]AUM{{MessageKind: AUMRemoveKey, KeyID: []byte{1, 2, 3, 4}, PrevAUMHash: fromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03")}},
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State{
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Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
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LastAUMHash: hashFromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03"),
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},
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State{
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LastAUMHash: hashFromHex("15d65756abfafbb592279503f40759898590c9c59056be1e2e9f02684c15ba4b"),
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},
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},
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{
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"UpdateKey",
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[]AUM{{MessageKind: AUMUpdateKey, KeyID: []byte{1, 2, 3, 4}, Votes: &intOne, Meta: map[string]string{"a": "b"}, PrevAUMHash: fromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03")}},
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State{
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Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
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LastAUMHash: hashFromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03"),
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},
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State{
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LastAUMHash: hashFromHex("828fe04c16032cf3e0b021abca0b4d79924b0a18b2e627b308347aa87ce7c21c"),
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Keys: []Key{{Kind: Key25519, Votes: 1, Meta: map[string]string{"a": "b"}, Public: []byte{1, 2, 3, 4}}},
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},
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},
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{
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"ChainedKeyUpdates",
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[]AUM{
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{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
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{MessageKind: AUMRemoveKey, KeyID: []byte{1, 2, 3, 4}, PrevAUMHash: fromHex("f09bda3bb7cf6756ea9adc25770aede4b3ca8142949d6ef5ca0add29af912fd4")},
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},
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State{
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Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
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},
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State{
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Keys: []Key{{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
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LastAUMHash: hashFromHex("218165fe5f757304b9deaff4ac742890364f5f509e533c74e80e0ce35e44ee1d"),
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},
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},
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{
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"Disablement",
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[]AUM{{MessageKind: AUMDisableNL, DisablementSecret: []byte{1, 2, 3, 4}, PrevAUMHash: fromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03")}},
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State{
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DisablementSecrets: [][]byte{disablementKDF([]byte{1, 2, 3, 4})},
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LastAUMHash: hashFromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03"),
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},
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State{},
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},
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{
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"Checkpoint",
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[]AUM{
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{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
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{MessageKind: AUMCheckpoint, State: &State{
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Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
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}, PrevAUMHash: fromHex("f09bda3bb7cf6756ea9adc25770aede4b3ca8142949d6ef5ca0add29af912fd4")},
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},
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State{DisablementSecrets: [][]byte{[]byte{1, 2, 3, 4}}},
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State{
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Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
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LastAUMHash: hashFromHex("2e34f7e21883c35c8e34ec06e735f7ed8a14c3ceeb11ccb18fcbc11d51c8dabb"),
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},
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},
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}
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for _, tc := range tcs {
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t.Run(tc.Name, func(t *testing.T) {
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state := tc.Start
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for i := range tc.Updates {
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var err error
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// t.Logf("update[%d] start-state = %+v", i, state)
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state, err = state.applyVerifiedAUM(tc.Updates[i])
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if err != nil {
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t.Fatalf("Apply message[%d] failed: %v", i, err)
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}
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// t.Logf("update[%d] end-state = %+v", i, state)
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updateHash := tc.Updates[i].Hash()
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if tc.Updates[i].MessageKind != AUMDisableNL {
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if got, want := *state.LastAUMHash, updateHash[:]; !bytes.Equal(got[:], want) {
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t.Errorf("expected state.LastAUMHash = %x (update %d), got %x", want, i, got)
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}
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}
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}
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if diff := cmp.Diff(tc.End, state, cmpopts.EquateEmpty()); diff != "" {
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t.Errorf("output state differs (+got, -want):\n%s", diff)
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}
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})
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}
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}
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func TestApplyUpdateErrors(t *testing.T) {
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tcs := []struct {
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Name string
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Updates []AUM
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Start State
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Error error
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}{
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{
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"AddKey exists",
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[]AUM{{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
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State{Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
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errors.New("key already exists"),
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},
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{
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"RemoveKey notfound",
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[]AUM{{MessageKind: AUMRemoveKey, Key: &Key{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
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State{},
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ErrNoSuchKey,
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},
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{
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"UpdateKey notfound",
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[]AUM{{MessageKind: AUMUpdateKey, KeyID: []byte{1}}},
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State{},
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ErrNoSuchKey,
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},
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{
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"Bad lastAUMHash",
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[]AUM{
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{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
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{MessageKind: AUMRemoveKey, KeyID: []byte{1, 2, 3, 4}, PrevAUMHash: fromHex("1234")},
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},
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State{
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Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
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},
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errors.New("parent AUMHash mismatch"),
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},
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}
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for _, tc := range tcs {
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t.Run(tc.Name, func(t *testing.T) {
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state := tc.Start
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for i := range tc.Updates {
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var err error
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// t.Logf("update[%d] start-state = %+v", i, state)
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state, err = state.applyVerifiedAUM(tc.Updates[i])
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if err != nil {
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if err.Error() != tc.Error.Error() {
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t.Errorf("state[%d].Err = %v, want %v", i, err, tc.Error)
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} else {
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return
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}
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}
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// t.Logf("update[%d] end-state = %+v", i, state)
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}
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t.Errorf("did not error, expected %v", tc.Error)
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})
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}
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}
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