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
|
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/quick_start/quick_start_message.h"
#include <memory>
#include "base/base64.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/types/expected.h"
#include "chromeos/ash/components/quick_start/quick_start_message_type.h"
#include "sandbox/policy/sandbox.h"
namespace {
constexpr char kSecondDeviceAuthPayloadKey[] = "secondDeviceAuthPayload";
constexpr char kBootstrapConfigurationsPayloadKey[] = "bootstrapConfigurations";
constexpr char kBootstrapOptionsPayloadKey[] = "bootstrapOptions";
constexpr char kQuickStartPayloadKey[] = "quickStartPayload";
constexpr char kBootstrapStateKey[] = "bootstrapState";
std::string GetStringKeyForQuickStartMessageType(
ash::quick_start::QuickStartMessageType message_type) {
switch (message_type) {
case ash::quick_start::QuickStartMessageType::kSecondDeviceAuthPayload:
return kSecondDeviceAuthPayloadKey;
case ash::quick_start::QuickStartMessageType::kBootstrapConfigurations:
// For BootstrapConfigurations, we use the top-level payload since
// multiple keys need to be set.
return std::string();
case ash::quick_start::QuickStartMessageType::kBootstrapOptions:
return kBootstrapOptionsPayloadKey;
case ash::quick_start::QuickStartMessageType::kQuickStartPayload:
return kQuickStartPayloadKey;
case ash::quick_start::QuickStartMessageType::kBootstrapState:
// For BootstrapState, use the top-level payload.
return std::string();
}
}
bool IsMessagePayloadBase64Encoded(
ash::quick_start::QuickStartMessageType message_type) {
switch (message_type) {
case ash::quick_start::QuickStartMessageType::kSecondDeviceAuthPayload:
case ash::quick_start::QuickStartMessageType::kBootstrapOptions:
case ash::quick_start::QuickStartMessageType::kBootstrapConfigurations:
case ash::quick_start::QuickStartMessageType::kBootstrapState:
return false;
case ash::quick_start::QuickStartMessageType::kQuickStartPayload:
return true;
}
}
} // namespace
namespace ash::quick_start {
// static
base::expected<std::unique_ptr<QuickStartMessage>, QuickStartMessage::ReadError>
QuickStartMessage::ReadMessage(std::vector<uint8_t> data) {
std::string str_data(data.begin(), data.end());
std::optional<base::Value> data_value = base::JSONReader::Read(str_data);
if (!data_value.has_value()) {
LOG(ERROR) << "Message is not JSON";
return base::unexpected(QuickStartMessage::ReadError::INVALID_JSON);
}
if (!data_value->is_dict()) {
LOG(ERROR) << "Message is not a JSON dictionary";
return base::unexpected(QuickStartMessage::ReadError::INVALID_JSON);
}
base::Value::Dict& message = data_value.value().GetDict();
base::Value::Dict* payload;
std::string* encoded_json_payload;
if (message.FindDict(kBootstrapConfigurationsPayloadKey)) {
// BootstrapConfigurations needs to have a higher precedence than
// QuickStartPayload since a BootstrapConfigurations message may also
// contain a QuickStartPayload.
return std::make_unique<QuickStartMessage>(
ash::quick_start::QuickStartMessageType::kBootstrapConfigurations,
message.Clone());
} else if ((encoded_json_payload =
message.FindString(kQuickStartPayloadKey))) {
std::string json_payload;
bool base64_decoding_succeeded =
base::Base64Decode(*encoded_json_payload, &json_payload,
base::Base64DecodePolicy::kForgiving);
if (!base64_decoding_succeeded) {
LOG(ERROR) << "quickStartPayload does not contain a valid base64 encoded "
"payload";
return base::unexpected(
QuickStartMessage::ReadError::BASE64_DESERIALIZATION_FAILURE);
}
std::optional<base::Value> json_reader_result =
base::JSONReader::Read(json_payload);
if (!json_reader_result.has_value()) {
LOG(ERROR) << "Unable to decode base64 encoded payload into JSON";
return base::unexpected(
QuickStartMessage::ReadError::BASE64_DESERIALIZATION_FAILURE);
}
payload = json_reader_result->GetIfDict();
if (payload == nullptr) {
LOG(ERROR) << "Payload is not a JSON dictionary";
return base::unexpected(
QuickStartMessage::ReadError::BASE64_DESERIALIZATION_FAILURE);
}
return std::make_unique<QuickStartMessage>(
ash::quick_start::QuickStartMessageType::kQuickStartPayload,
payload->Clone());
} else if ((payload = message.FindDict(kSecondDeviceAuthPayloadKey))) {
return std::make_unique<QuickStartMessage>(
ash::quick_start::QuickStartMessageType::kSecondDeviceAuthPayload,
payload->Clone());
} else if ((payload = message.FindDict(kBootstrapOptionsPayloadKey))) {
return std::make_unique<QuickStartMessage>(
ash::quick_start::QuickStartMessageType::kBootstrapOptions,
payload->Clone());
} else if (message.FindInt(kBootstrapStateKey)) {
// BootstrapState needs to have the lowest precedence since other messages
// may also contain a BootstrapState payload. The BootstrapState payload in
// those messages may be safely ignored.
return std::make_unique<QuickStartMessage>(
ash::quick_start::QuickStartMessageType::kBootstrapState,
message.Clone());
} else {
LOG(ERROR) << "Message does not contain known payload.";
return base::unexpected(
QuickStartMessage::ReadError::MISSING_MESSAGE_PAYLOAD);
}
}
// static
base::expected<std::unique_ptr<QuickStartMessage>, QuickStartMessage::ReadError>
QuickStartMessage::ReadMessage(std::vector<uint8_t> data,
QuickStartMessageType message_type) {
auto result = ReadMessage(data);
if (result.has_value() && result.value()->get_type() != message_type) {
LOG(ERROR) << "Unexpected message type: received="
<< result.value()->get_type() << ", expected=" << message_type;
return base::unexpected(
QuickStartMessage::ReadError::UNEXPECTED_MESSAGE_TYPE);
}
return result;
}
QuickStartMessage::QuickStartMessage(QuickStartMessageType message_type)
: message_type_(message_type) {
payload_ = base::Value::Dict();
}
QuickStartMessage::QuickStartMessage(QuickStartMessageType message_type,
base::Value::Dict payload)
: message_type_(message_type), payload_(std::move(payload)) {}
QuickStartMessage::~QuickStartMessage() = default;
base::Value::Dict* QuickStartMessage::GetPayload() {
return &payload_;
}
std::unique_ptr<base::Value::Dict> QuickStartMessage::GenerateEncodedMessage() {
std::unique_ptr<base::Value::Dict> message =
std::make_unique<base::Value::Dict>();
std::string str_payload_key =
GetStringKeyForQuickStartMessageType(message_type_);
if (str_payload_key.empty()) {
return std::make_unique<base::Value::Dict>(std::move(payload_));
}
bool base64_encoded_payload_ = IsMessagePayloadBase64Encoded(message_type_);
if (!base64_encoded_payload_) {
message->Set(str_payload_key, std::move(payload_));
} else {
std::string json;
bool json_writer_succeeded = base::JSONWriter::Write(payload_, &json);
if (!json_writer_succeeded) {
LOG(ERROR) << "Failed to write message payload to JSON.";
return nullptr;
}
std::string base64_payload = base::Base64Encode(json);
message->Set(str_payload_key, base64_payload);
}
return message;
}
} // namespace ash::quick_start
|
