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
|
package otr3
import (
"crypto/rand"
"testing"
)
func Test_receiveDecoded_resolveProtocolVersion(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.Policies = policies(allowV3)
_, _, err := c.receiveDecoded(fixtureDHCommitMsg())
assertNil(t, err)
assertEquals(t, c.version, otrV3{})
c = &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.Policies = policies(allowV2)
_, _, err = c.receiveDecoded(fixtureDHCommitMsgV2())
assertNil(t, err)
assertEquals(t, c.version, otrV2{})
}
func Test_receiveDecoded_checkMessageVersion(t *testing.T) {
cV2 := &Conversation{version: otrV2{}}
cV2.SetOurKeys([]PrivateKey{bobPrivateKey})
msgV2, _ := cV2.wrapMessageHeader(msgTypeDHCommit, nil)
cV3 := &Conversation{version: otrV3{}}
cV3.SetOurKeys([]PrivateKey{bobPrivateKey})
msgV3, _ := cV3.wrapMessageHeader(msgTypeDHCommit, nil)
_, _, err := cV2.receiveDecoded(msgV3)
assertEquals(t, err, errWrongProtocolVersion)
_, _, err = cV3.receiveDecoded(msgV2)
assertEquals(t, err, errWrongProtocolVersion)
}
func Test_receiveDecoded_returnsErrorIfTheMessageIsCorrupt(t *testing.T) {
cV3 := &Conversation{version: otrV3{}}
cV3.SetOurKeys([]PrivateKey{bobPrivateKey})
cV3.ourInstanceTag = 0x101
cV3.theirInstanceTag = 0x102
_, _, err := cV3.receiveDecoded([]byte{})
assertEquals(t, err, errInvalidOTRMessage)
_, _, err = cV3.receiveDecoded([]byte{0x00, 0x00})
assertEquals(t, err, errWrongProtocolVersion)
_, _, err = cV3.receiveDecoded([]byte{0x00, 0x03, 0x56, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x01, 0x01})
assertDeepEquals(t, err, newOtrError("unknown message type 0x56"))
}
func Test_receivePlaintext_signalsAMessageEventThatItWasUnencryptedIfNotInPlaintextMessageMode(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.msgState = encrypted
c.expectMessageEvent(t, func() {
c.receivePlaintext(ValidMessage("Hello world"))
}, MessageEventReceivedMessageUnencrypted, []byte("Hello world"), nil)
}
func Test_receivePlaintext_signalsAMessageEventThatItWasUnencryptedIfRequiringEncryption(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.msgState = plainText
c.Policies = policies(requireEncryption)
c.expectMessageEvent(t, func() {
c.receivePlaintext(ValidMessage("Hello world"))
}, MessageEventReceivedMessageUnencrypted, []byte("Hello world"), nil)
}
func Test_receivePlaintext_doesntSignalAMessageEventThatItWasUnencryptedIfNotInPlaintextMessageModeIfNotRequiringEncryption(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.msgState = plainText
c.doesntExpectMessageEvent(t, func() {
c.receivePlaintext(ValidMessage("Hello world"))
})
}
func Test_receiveTaggedPlaintext_signalsAMessageEventThatItWasUnencryptedIfNotInPlaintextMessageMode(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.msgState = encrypted
c.expectMessageEvent(t, func() {
c.receiveTaggedPlaintext(ValidMessage("Hello \t \t\t\t\t \t \t \t world"))
}, MessageEventReceivedMessageUnencrypted, []byte("Hello world"), nil)
}
func Test_receiveTaggedPlaintext_signalsAMessageEventThatItWasUnencryptedIfRequiringEncryption(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.msgState = plainText
c.Policies = policies(requireEncryption)
c.expectMessageEvent(t, func() {
c.receiveTaggedPlaintext(ValidMessage("Hello \t \t\t\t\t \t \t \t world"))
}, MessageEventReceivedMessageUnencrypted, []byte("Hello world"), nil)
}
func Test_receiveTaggedPlaintext_doesntSignalAMessageEventThatItWasUnencryptedIfNotInPlaintextMessageModeIfNotRequiringEncryption(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.msgState = plainText
c.doesntExpectMessageEvent(t, func() {
c.receiveTaggedPlaintext(ValidMessage("Hello \t \t\t\t\t \t \t \t world"))
})
}
func Test_Receive_signalsAMessageEventWhenWeReceiveAMessageThatLooksLikeAnOTRMessageButWeCantUnderstandIt(t *testing.T) {
c := &Conversation{}
c.SetOurKeys([]PrivateKey{bobPrivateKey})
c.Policies = policies(allowV3)
c.expectMessageEvent(t, func() {
c.Receive(ValidMessage("?OTR Something: strange"))
}, MessageEventReceivedMessageUnrecognized, nil, nil)
}
func Test_Receive_signalsAMessageEventWhenWeReceiveADataMessageForAnotherInstance(t *testing.T) {
alice := &Conversation{Rand: rand.Reader}
alice.ourInstanceTag = 0x201
alice.theirInstanceTag = 0x301
alice.SetOurKeys([]PrivateKey{alicePrivateKey})
alice.ourCurrentKey = alicePrivateKey
alice.Policies = policies(allowV3)
alice.theirKey = bobPrivateKey.PublicKey()
bob := &Conversation{Rand: rand.Reader}
bob.ourInstanceTag = 0x301
bob.theirInstanceTag = 0x201
bob.SetOurKeys([]PrivateKey{bobPrivateKey})
bob.ourCurrentKey = bobPrivateKey
bob.Policies = policies(allowV3)
bob.theirKey = alicePrivateKey.PublicKey()
var toSend []ValidMessage
msg := alice.QueryMessage()
_, toSend, _ = bob.Receive(msg)
encoded := toSend[0][5 : len(toSend[0])-1]
decoded, _ := b64decode(encoded)
decoded[6] = 0x02 // Change the instance tag low byte
reencoded := append(append(msgMarker, b64encode(decoded)...), '.')
alice.expectMessageEvent(t, func() {
alice.Receive(reencoded)
}, MessageEventReceivedMessageForOtherInstance, nil, nil)
decoded[6] = 0x01
decoded[10] = 0x05
reencoded = append(append(msgMarker, b64encode(decoded)...), '.')
alice.expectMessageEvent(t, func() {
alice.Receive(reencoded)
}, MessageEventReceivedMessageForOtherInstance, nil, nil)
}
func Test_Receive_NoFragments(t *testing.T) {
alice := aliceContextAfterAKE()
alice.msgState = encrypted
bob := bobContextAfterAKE()
bob.msgState = encrypted
fragments, _, _ := alice.createSerializedDataMessage(MessagePlaintext("hello!"), messageFlagNormal, []tlv{})
plain, _, err := bob.Receive(fragments[0])
assertNil(t, err)
assertDeepEquals(t, plain, MessagePlaintext("hello!"))
}
func Test_Receive_Fragments(t *testing.T) {
alice := aliceContextAfterAKE()
alice.msgState = encrypted
alice.SetFragmentSize(200)
bob := bobContextAfterAKE()
bob.msgState = encrypted
fragments, _, _ := alice.createSerializedDataMessage(MessagePlaintext("hello!"), messageFlagNormal, []tlv{})
var err error
var plain MessagePlaintext
for _, fragment := range fragments {
plain, _, err = bob.Receive(fragment)
assertNil(t, err)
}
assertDeepEquals(t, plain, MessagePlaintext("hello!"))
}
func Test_receiveErrorMessage_updateMayRetransmitToRetransmitWithPrefix(t *testing.T) {
c := aliceContextAfterAKE()
c.msgState = encrypted
m := []byte("?OTR Error:error msg")
c.receiveErrorMessage(m)
assertEquals(t, c.resend.mayRetransmit, retransmitWithPrefix)
}
func Test_receiveErrorMessage_willSignalAnEventWithTheErrorMessage(t *testing.T) {
c := aliceContextAfterAKE()
c.msgState = encrypted
m := []byte("?OTR Error:error msg")
c.expectMessageEvent(t, func() {
c.receiveErrorMessage(m)
}, MessageEventReceivedMessageGeneralError, []byte("error msg"), nil)
}
func Test_receiveErrorMessage_willSignalAnEventWithTheErrorMessageWithoutLeadingSpace(t *testing.T) {
c := aliceContextAfterAKE()
c.msgState = encrypted
m := []byte("?OTR Error: an error msg")
c.expectMessageEvent(t, func() {
c.receiveErrorMessage(m)
}, MessageEventReceivedMessageGeneralError, []byte("an error msg"), nil)
}
func Test_Receive_returnsAnErrorIfWeReceiveARequestToStartAVersion1KeyExchange(t *testing.T) {
c := &Conversation{}
c.Policies = policies(allowV3)
_, _, err := c.Receive(ValidMessage("?OTR:AAEK"))
assertEquals(t, err, errUnsupportedOTRVersion)
}
func Test_Receive_willResetFragmentationContextIfWeReceiveAnUnfragmentedMessage(t *testing.T) {
c := aliceContextAfterAKE()
c.fragmentationContext = fragmentationContext{[]byte("hello"), 2, 5}
c.Receive(ValidMessage("Hello World"))
assertNil(t, c.fragmentationContext.frag)
assertEquals(t, c.fragmentationContext.currentIndex, uint16(0))
assertEquals(t, c.fragmentationContext.currentLen, uint16(0))
}
|
