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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "remoting/host/security_key/security_key_message.h" | 5 #include "remoting/host/security_key/security_key_message.h" |
| 6 | 6 |
| 7 #include <cstdint> | 7 #include <cstdint> |
| 8 #include <memory> | 8 #include <memory> |
| 9 #include <string> | 9 #include <string> |
| 10 #include <utility> | 10 #include <utility> |
| 11 | 11 |
| 12 #include "base/callback.h" | 12 #include "base/callback.h" |
| 13 #include "base/logging.h" | 13 #include "base/logging.h" |
| 14 | 14 |
| 15 namespace { | 15 namespace { |
| 16 | 16 |
| 17 // Limit security key messages to 256KB. | 17 // Limit remote security key messages to 256KB. |
| 18 const uint32_t kMaxSecurityKeyMessageByteCount = 256 * 1024; | 18 const uint32_t kMaxSecurityKeyMessageByteCount = 256 * 1024; |
| 19 | 19 |
| 20 } // namespace | 20 } // namespace |
| 21 | 21 |
| 22 namespace remoting { | 22 namespace remoting { |
| 23 | 23 |
| 24 const int SecurityKeyMessage::kHeaderSizeBytes = 4; | 24 const int SecurityKeyMessage::kHeaderSizeBytes = 4; |
| 25 | 25 |
| 26 const int SecurityKeyMessage::kMessageTypeSizeBytes = 1; | 26 const int SecurityKeyMessage::kMessageTypeSizeBytes = 1; |
| 27 | 27 |
| 28 SecurityKeyMessage::SecurityKeyMessage() {} | 28 SecurityKeyMessage::SecurityKeyMessage() {} |
| 29 | 29 |
| 30 SecurityKeyMessage::~SecurityKeyMessage() {} | 30 SecurityKeyMessage::~SecurityKeyMessage() {} |
| 31 | 31 |
| 32 bool SecurityKeyMessage::IsValidMessageSize(uint32_t message_size) { | 32 bool SecurityKeyMessage::IsValidMessageSize(uint32_t message_size) { |
| 33 return message_size > 0 && message_size <= kMaxSecurityKeyMessageByteCount; | 33 return message_size > 0 && message_size <= kMaxSecurityKeyMessageByteCount; |
| 34 } | 34 } |
| 35 | 35 |
| 36 SecurityKeyMessageType SecurityKeyMessage::MessageTypeFromValue(int value) { | 36 RemoteSecurityKeyMessageType SecurityKeyMessage::MessageTypeFromValue( |
| 37 int value) { |
| 37 // Note: The static_cast from enum value to int should be safe since the enum | 38 // Note: The static_cast from enum value to int should be safe since the enum |
| 38 // type is an unsigned 8bit value. | 39 // type is an unsigned 8bit value. |
| 39 switch (value) { | 40 switch (value) { |
| 40 case static_cast<int>(SecurityKeyMessageType::CONNECT): | 41 case static_cast<int>(RemoteSecurityKeyMessageType::CONNECT): |
| 41 case static_cast<int>(SecurityKeyMessageType::CONNECT_RESPONSE): | 42 case static_cast<int>(RemoteSecurityKeyMessageType::CONNECT_RESPONSE): |
| 42 case static_cast<int>(SecurityKeyMessageType::CONNECT_ERROR): | 43 case static_cast<int>(RemoteSecurityKeyMessageType::CONNECT_ERROR): |
| 43 case static_cast<int>(SecurityKeyMessageType::REQUEST): | 44 case static_cast<int>(RemoteSecurityKeyMessageType::REQUEST): |
| 44 case static_cast<int>(SecurityKeyMessageType::REQUEST_RESPONSE): | 45 case static_cast<int>(RemoteSecurityKeyMessageType::REQUEST_RESPONSE): |
| 45 case static_cast<int>(SecurityKeyMessageType::REQUEST_ERROR): | 46 case static_cast<int>(RemoteSecurityKeyMessageType::REQUEST_ERROR): |
| 46 case static_cast<int>(SecurityKeyMessageType::UNKNOWN_COMMAND): | 47 case static_cast<int>(RemoteSecurityKeyMessageType::UNKNOWN_COMMAND): |
| 47 case static_cast<int>(SecurityKeyMessageType::UNKNOWN_ERROR): | 48 case static_cast<int>(RemoteSecurityKeyMessageType::UNKNOWN_ERROR): |
| 48 case static_cast<int>(SecurityKeyMessageType::INVALID): | 49 case static_cast<int>(RemoteSecurityKeyMessageType::INVALID): |
| 49 return static_cast<SecurityKeyMessageType>(value); | 50 return static_cast<RemoteSecurityKeyMessageType>(value); |
| 50 | 51 |
| 51 default: | 52 default: |
| 52 LOG(ERROR) << "Unknown message type passed in: " << value; | 53 LOG(ERROR) << "Unknown message type passed in: " << value; |
| 53 return SecurityKeyMessageType::INVALID; | 54 return RemoteSecurityKeyMessageType::INVALID; |
| 54 } | 55 } |
| 55 } | 56 } |
| 56 | 57 |
| 57 std::unique_ptr<SecurityKeyMessage> SecurityKeyMessage::CreateMessageForTest( | 58 std::unique_ptr<SecurityKeyMessage> SecurityKeyMessage::CreateMessageForTest( |
| 58 SecurityKeyMessageType type, | 59 RemoteSecurityKeyMessageType type, |
| 59 const std::string& payload) { | 60 const std::string& payload) { |
| 60 std::unique_ptr<SecurityKeyMessage> message(new SecurityKeyMessage()); | 61 std::unique_ptr<SecurityKeyMessage> message(new SecurityKeyMessage()); |
| 61 message->type_ = type; | 62 message->type_ = type; |
| 62 message->payload_ = payload; | 63 message->payload_ = payload; |
| 63 | 64 |
| 64 return message; | 65 return message; |
| 65 } | 66 } |
| 66 | 67 |
| 67 bool SecurityKeyMessage::ParseMessage(const std::string& message_data) { | 68 bool SecurityKeyMessage::ParseMessage(const std::string& message_data) { |
| 68 if (!IsValidMessageSize(message_data.size())) { | 69 if (!IsValidMessageSize(message_data.size())) { |
| 69 return false; | 70 return false; |
| 70 } | 71 } |
| 71 | 72 |
| 72 // The first char of the message is the message type. | 73 // The first char of the message is the message type. |
| 73 type_ = MessageTypeFromValue(message_data[0]); | 74 type_ = MessageTypeFromValue(message_data[0]); |
| 74 if (type_ == SecurityKeyMessageType::INVALID) { | 75 if (type_ == RemoteSecurityKeyMessageType::INVALID) { |
| 75 return false; | 76 return false; |
| 76 } | 77 } |
| 77 | 78 |
| 78 payload_.clear(); | 79 payload_.clear(); |
| 79 if (message_data.size() > kMessageTypeSizeBytes) { | 80 if (message_data.size() > kMessageTypeSizeBytes) { |
| 80 payload_ = message_data.substr(1); | 81 payload_ = message_data.substr(1); |
| 81 } | 82 } |
| 82 | 83 |
| 83 return true; | 84 return true; |
| 84 } | 85 } |
| 85 | 86 |
| 86 } // namespace remoting | 87 } // namespace remoting |
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