1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build !ts_omit_tailnetlock
package tka
import (
"bytes"
"encoding/hex"
"errors"
"testing"
"github.com/fxamacker/cbor/v2"
"github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
)
func fromHex(in string) []byte {
out, err := hex.DecodeString(in)
if err != nil {
panic(err)
}
return out
}
func hashFromHex(in string) *AUMHash {
var out AUMHash
copy(out[:], fromHex(in))
return &out
}
func TestCloneState(t *testing.T) {
tcs := []struct {
Name string
State State
}{
{
"Empty",
State{},
},
{
"Key",
State{
Keys: []Key{{Kind: Key25519, Votes: 2, Public: []byte{5, 6, 7, 8}, Meta: map[string]string{"a": "b"}}},
},
},
{
"StateID",
State{
StateID1: 42,
StateID2: 22,
},
},
{
"DisablementSecrets",
State{
DisablementSecrets: [][]byte{
{1, 2, 3, 4},
{5, 6, 7, 8},
},
},
},
}
for _, tc := range tcs {
t.Run(tc.Name, func(t *testing.T) {
if diff := cmp.Diff(tc.State, tc.State.Clone()); diff != "" {
t.Errorf("output state differs (-want, +got):\n%s", diff)
}
// Make sure the cloned State is the same even after
// an encode + decode into + from CBOR.
t.Run("cbor", func(t *testing.T) {
out := bytes.NewBuffer(nil)
encoder, err := cbor.CTAP2EncOptions().EncMode()
if err != nil {
t.Fatal(err)
}
if err := encoder.NewEncoder(out).Encode(tc.State.Clone()); err != nil {
t.Fatal(err)
}
var decodedState State
if err := cbor.Unmarshal(out.Bytes(), &decodedState); err != nil {
t.Fatalf("Unmarshal failed: %v", err)
}
if diff := cmp.Diff(tc.State, decodedState); diff != "" {
t.Errorf("decoded state differs (-want, +got):\n%s", diff)
}
})
})
}
}
func TestApplyUpdatesChain(t *testing.T) {
intOne := uint(1)
tcs := []struct {
Name string
Updates []AUM
Start State
End State
}{
{
"AddKey",
[]AUM{{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
State{},
State{
Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
LastAUMHash: hashFromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03"),
},
},
{
"RemoveKey",
[]AUM{{MessageKind: AUMRemoveKey, KeyID: []byte{1, 2, 3, 4}, PrevAUMHash: fromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03")}},
State{
Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
LastAUMHash: hashFromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03"),
},
State{
LastAUMHash: hashFromHex("15d65756abfafbb592279503f40759898590c9c59056be1e2e9f02684c15ba4b"),
},
},
{
"UpdateKey",
[]AUM{{MessageKind: AUMUpdateKey, KeyID: []byte{1, 2, 3, 4}, Votes: &intOne, Meta: map[string]string{"a": "b"}, PrevAUMHash: fromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03")}},
State{
Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
LastAUMHash: hashFromHex("53898e4311d0b6087fcbb871563868a16c629d9267df851fcfa7b52b31d2bd03"),
},
State{
LastAUMHash: hashFromHex("d55458a9c3ed6997439ba5a18b9b62d2c6e5e0c1bb4c61409e92a1281a3b458d"),
Keys: []Key{{Kind: Key25519, Votes: 1, Meta: map[string]string{"a": "b"}, Public: []byte{1, 2, 3, 4}}},
},
},
{
"ChainedKeyUpdates",
[]AUM{
{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
{MessageKind: AUMRemoveKey, KeyID: []byte{1, 2, 3, 4}, PrevAUMHash: fromHex("f09bda3bb7cf6756ea9adc25770aede4b3ca8142949d6ef5ca0add29af912fd4")},
},
State{
Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
},
State{
Keys: []Key{{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
LastAUMHash: hashFromHex("218165fe5f757304b9deaff4ac742890364f5f509e533c74e80e0ce35e44ee1d"),
},
},
{
"Checkpoint",
[]AUM{
{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
{MessageKind: AUMCheckpoint, State: &State{
Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
}, PrevAUMHash: fromHex("f09bda3bb7cf6756ea9adc25770aede4b3ca8142949d6ef5ca0add29af912fd4")},
},
State{DisablementSecrets: [][]byte{{1, 2, 3, 4}}},
State{
Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
LastAUMHash: hashFromHex("57343671da5eea3cfb502954e976e8028bffd3540b50a043b2a65a8d8d8217d0"),
},
},
}
for _, tc := range tcs {
t.Run(tc.Name, func(t *testing.T) {
state := tc.Start
for i := range tc.Updates {
var err error
// t.Logf("update[%d] start-state = %+v", i, state)
state, err = state.applyVerifiedAUM(tc.Updates[i])
if err != nil {
t.Fatalf("Apply message[%d] failed: %v", i, err)
}
// t.Logf("update[%d] end-state = %+v", i, state)
updateHash := tc.Updates[i].Hash()
if got, want := *state.LastAUMHash, updateHash[:]; !bytes.Equal(got[:], want) {
t.Errorf("expected state.LastAUMHash = %x (update %d), got %x", want, i, got)
}
}
if diff := cmp.Diff(tc.End, state, cmpopts.EquateEmpty()); diff != "" {
t.Errorf("output state differs (+got, -want):\n%s", diff)
}
})
}
}
func TestApplyUpdateErrors(t *testing.T) {
tooLargeVotes := uint(99999)
tcs := []struct {
Name string
Updates []AUM
Start State
Error error
}{
{
"AddKey exists",
[]AUM{{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
State{Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
errors.New("key already exists"),
},
{
"RemoveKey notfound",
[]AUM{{MessageKind: AUMRemoveKey, Key: &Key{Kind: Key25519, Public: []byte{1, 2, 3, 4}}}},
State{},
ErrNoSuchKey,
},
{
"UpdateKey notfound",
[]AUM{{MessageKind: AUMUpdateKey, KeyID: []byte{1}}},
State{},
ErrNoSuchKey,
},
{
"UpdateKey now fails validation",
[]AUM{{MessageKind: AUMUpdateKey, KeyID: []byte{1}, Votes: &tooLargeVotes}},
State{Keys: []Key{{Kind: Key25519, Public: []byte{1}}}},
errors.New("updated key fails validation: excessive key weight: 99999 > 4096"),
},
{
"Bad lastAUMHash",
[]AUM{
{MessageKind: AUMAddKey, Key: &Key{Kind: Key25519, Public: []byte{5, 6, 7, 8}}},
{MessageKind: AUMRemoveKey, KeyID: []byte{1, 2, 3, 4}, PrevAUMHash: fromHex("1234")},
},
State{
Keys: []Key{{Kind: Key25519, Public: []byte{1, 2, 3, 4}}},
},
errors.New("parent AUMHash mismatch"),
},
{
"Bad StateID",
[]AUM{{MessageKind: AUMCheckpoint, State: &State{StateID1: 1}}},
State{Keys: []Key{{Kind: Key25519, Public: []byte{1}}}, StateID1: 42},
errors.New("checkpointed state has an incorrect stateID"),
},
}
for _, tc := range tcs {
t.Run(tc.Name, func(t *testing.T) {
state := tc.Start
for i := range tc.Updates {
var err error
// t.Logf("update[%d] start-state = %+v", i, state)
state, err = state.applyVerifiedAUM(tc.Updates[i])
if err != nil {
if err.Error() != tc.Error.Error() {
t.Errorf("state[%d].Err = %v, want %v", i, err, tc.Error)
} else {
return
}
}
// t.Logf("update[%d] end-state = %+v", i, state)
}
t.Errorf("did not error, expected %v", tc.Error)
})
}
}
|
