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
|
// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cast/receiver/channel/device_auth_namespace_handler.h"
#include "cast/common/channel/cast_socket.h"
#include "cast/common/channel/message_util.h"
#include "cast/common/channel/proto/cast_channel.pb.h"
#include "cast/common/channel/test/fake_cast_socket.h"
#include "cast/common/channel/test/mock_socket_error_handler.h"
#include "cast/common/channel/virtual_connection_manager.h"
#include "cast/common/channel/virtual_connection_router.h"
#include "cast/receiver/channel/testing/device_auth_test_helpers.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "testing/util/read_file.h"
namespace cast {
namespace channel {
namespace {
using ::testing::_;
using ::testing::ElementsAreArray;
using ::testing::Invoke;
class DeviceAuthNamespaceHandlerTest : public ::testing::Test {
public:
void SetUp() override {
socket_ = fake_cast_socket_pair_.socket.get();
router_.TakeSocket(&mock_error_handler_,
std::move(fake_cast_socket_pair_.socket));
router_.AddHandlerForLocalId(kPlatformReceiverId, &auth_handler_);
}
protected:
FakeCastSocketPair fake_cast_socket_pair_;
MockSocketErrorHandler mock_error_handler_;
CastSocket* socket_;
StaticCredentialsProvider creds_;
VirtualConnectionManager manager_;
VirtualConnectionRouter router_{&manager_};
DeviceAuthNamespaceHandler auth_handler_{&creds_};
};
} // namespace
#define TEST_DATA_PREFIX OPENSCREEN_TEST_DATA_DIR "cast/receiver/channel/"
// The tests in this file use a pre-recorded AuthChallenge as input and a
// matching pre-recorded AuthResponse for verification. This is to make it
// easier to keep sender and receiver code separate, because the code that would
// really generate an AuthChallenge and verify an AuthResponse is under
// //cast/sender. The pre-recorded messages come from an integration test which
// _does_ properly call both sender and receiver sides, but can optionally
// record the messages for use in these unit tests. That test is currently
// under //cast/test. See //cast/test/README.md for more information.
//
// The tests generally follow this procedure:
// 1. Read a fake device certificate chain + TLS certificate from disk.
// 2. Read a pre-recorded CastMessage proto containing an AuthChallenge.
// 3. Send this CastMessage over a CastSocket to a DeviceAuthNamespaceHandler.
// 4. Catch the CastMessage response and check that it has an AuthResponse.
// 5. Check the AuthResponse against another pre-recorded protobuf.
TEST_F(DeviceAuthNamespaceHandlerTest, AuthResponse) {
InitStaticCredentialsFromFiles(
&creds_, nullptr, nullptr, TEST_DATA_PREFIX "device_key.pem",
TEST_DATA_PREFIX "device_chain.pem", TEST_DATA_PREFIX "device_tls.pem");
// Send an auth challenge. |auth_handler_| will automatically respond via
// |router_| and we will catch the result in |challenge_reply|.
CastMessage auth_challenge;
const std::string auth_challenge_string =
openscreen::ReadEntireFileToString(TEST_DATA_PREFIX "auth_challenge.pb");
ASSERT_TRUE(auth_challenge.ParseFromString(auth_challenge_string));
CastMessage challenge_reply;
EXPECT_CALL(fake_cast_socket_pair_.mock_peer_client, OnMessage(_, _))
.WillOnce(
Invoke([&challenge_reply](CastSocket* socket, CastMessage message) {
challenge_reply = std::move(message);
}));
fake_cast_socket_pair_.peer_socket->SendMessage(std::move(auth_challenge));
const std::string auth_response_string =
openscreen::ReadEntireFileToString(TEST_DATA_PREFIX "auth_response.pb");
AuthResponse expected_auth_response;
ASSERT_TRUE(expected_auth_response.ParseFromString(auth_response_string));
DeviceAuthMessage auth_message;
ASSERT_EQ(challenge_reply.payload_type(), CastMessage_PayloadType_BINARY);
ASSERT_TRUE(auth_message.ParseFromString(challenge_reply.payload_binary()));
ASSERT_TRUE(auth_message.has_response());
ASSERT_FALSE(auth_message.has_challenge());
ASSERT_FALSE(auth_message.has_error());
const AuthResponse& auth_response = auth_message.response();
EXPECT_EQ(expected_auth_response.signature(), auth_response.signature());
EXPECT_EQ(expected_auth_response.client_auth_certificate(),
auth_response.client_auth_certificate());
EXPECT_EQ(expected_auth_response.signature_algorithm(),
auth_response.signature_algorithm());
EXPECT_EQ(expected_auth_response.sender_nonce(),
auth_response.sender_nonce());
EXPECT_EQ(expected_auth_response.hash_algorithm(),
auth_response.hash_algorithm());
EXPECT_EQ(expected_auth_response.crl(), auth_response.crl());
EXPECT_THAT(
auth_response.intermediate_certificate(),
ElementsAreArray(expected_auth_response.intermediate_certificate()));
}
TEST_F(DeviceAuthNamespaceHandlerTest, BadNonce) {
InitStaticCredentialsFromFiles(
&creds_, nullptr, nullptr, TEST_DATA_PREFIX "device_key.pem",
TEST_DATA_PREFIX "device_chain.pem", TEST_DATA_PREFIX "device_tls.pem");
// Send an auth challenge. |auth_handler_| will automatically respond via
// |router_| and we will catch the result in |challenge_reply|.
CastMessage auth_challenge;
const std::string auth_challenge_string =
openscreen::ReadEntireFileToString(TEST_DATA_PREFIX "auth_challenge.pb");
ASSERT_TRUE(auth_challenge.ParseFromString(auth_challenge_string));
// Change the nonce to be different from what was used to record the correct
// response originally.
DeviceAuthMessage msg;
ASSERT_EQ(auth_challenge.payload_type(), CastMessage_PayloadType_BINARY);
ASSERT_TRUE(msg.ParseFromString(auth_challenge.payload_binary()));
ASSERT_TRUE(msg.has_challenge());
std::string* nonce = msg.mutable_challenge()->mutable_sender_nonce();
(*nonce)[0] = ~(*nonce)[0];
std::string new_payload;
ASSERT_TRUE(msg.SerializeToString(&new_payload));
auth_challenge.set_payload_binary(new_payload);
CastMessage challenge_reply;
EXPECT_CALL(fake_cast_socket_pair_.mock_peer_client, OnMessage(_, _))
.WillOnce(
Invoke([&challenge_reply](CastSocket* socket, CastMessage message) {
challenge_reply = std::move(message);
}));
fake_cast_socket_pair_.peer_socket->SendMessage(std::move(auth_challenge));
const std::string auth_response_string =
openscreen::ReadEntireFileToString(TEST_DATA_PREFIX "auth_response.pb");
AuthResponse expected_auth_response;
ASSERT_TRUE(expected_auth_response.ParseFromString(auth_response_string));
DeviceAuthMessage auth_message;
ASSERT_EQ(challenge_reply.payload_type(), CastMessage_PayloadType_BINARY);
ASSERT_TRUE(auth_message.ParseFromString(challenge_reply.payload_binary()));
ASSERT_TRUE(auth_message.has_response());
ASSERT_FALSE(auth_message.has_challenge());
ASSERT_FALSE(auth_message.has_error());
const AuthResponse& auth_response = auth_message.response();
// NOTE: This is the ultimate result of the nonce-mismatch.
EXPECT_NE(expected_auth_response.signature(), auth_response.signature());
}
TEST_F(DeviceAuthNamespaceHandlerTest, UnsupportedSignatureAlgorithm) {
InitStaticCredentialsFromFiles(
&creds_, nullptr, nullptr, TEST_DATA_PREFIX "device_key.pem",
TEST_DATA_PREFIX "device_chain.pem", TEST_DATA_PREFIX "device_tls.pem");
// Send an auth challenge. |auth_handler_| will automatically respond via
// |router_| and we will catch the result in |challenge_reply|.
CastMessage auth_challenge;
const std::string auth_challenge_string =
openscreen::ReadEntireFileToString(TEST_DATA_PREFIX "auth_challenge.pb");
ASSERT_TRUE(auth_challenge.ParseFromString(auth_challenge_string));
// Change the signature algorithm an unsupported value.
DeviceAuthMessage msg;
ASSERT_EQ(auth_challenge.payload_type(), CastMessage_PayloadType_BINARY);
ASSERT_TRUE(msg.ParseFromString(auth_challenge.payload_binary()));
ASSERT_TRUE(msg.has_challenge());
msg.mutable_challenge()->set_signature_algorithm(
SignatureAlgorithm::RSASSA_PSS);
std::string new_payload;
ASSERT_TRUE(msg.SerializeToString(&new_payload));
auth_challenge.set_payload_binary(new_payload);
CastMessage challenge_reply;
EXPECT_CALL(fake_cast_socket_pair_.mock_peer_client, OnMessage(_, _))
.WillOnce(
Invoke([&challenge_reply](CastSocket* socket, CastMessage message) {
challenge_reply = std::move(message);
}));
fake_cast_socket_pair_.peer_socket->SendMessage(std::move(auth_challenge));
DeviceAuthMessage auth_message;
ASSERT_EQ(challenge_reply.payload_type(), CastMessage_PayloadType_BINARY);
ASSERT_TRUE(auth_message.ParseFromString(challenge_reply.payload_binary()));
ASSERT_FALSE(auth_message.has_response());
ASSERT_FALSE(auth_message.has_challenge());
ASSERT_TRUE(auth_message.has_error());
}
} // namespace channel
} // namespace cast
|
