From 251c961eea640e18a90aaddc6c787d999dca09dd Mon Sep 17 00:00:00 2001 From: "madmaxoft@gmail.com" Date: Sun, 23 Sep 2012 20:03:26 +0000 Subject: Source files cleanup: Protocol-related files in a separate subfolder git-svn-id: http://mc-server.googlecode.com/svn/trunk@880 0a769ca7-a7f5-676a-18bf-c427514a06d6 --- source/Protocol/Protocol132.cpp | 769 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 769 insertions(+) create mode 100644 source/Protocol/Protocol132.cpp (limited to 'source/Protocol/Protocol132.cpp') diff --git a/source/Protocol/Protocol132.cpp b/source/Protocol/Protocol132.cpp new file mode 100644 index 000000000..33f404113 --- /dev/null +++ b/source/Protocol/Protocol132.cpp @@ -0,0 +1,769 @@ + +// Protocol132.cpp + +// Implements the cProtocol132 class representing the release 1.3.2 protocol (#39) + +#include "Globals.h" +#include "Protocol132.h" +#include "../cRoot.h" +#include "../cServer.h" +#include "../cClientHandle.h" +#include "../../CryptoPP/randpool.h" +#include "../cItem.h" +#include "../ChunkDataSerializer.h" +#include "../cPlayer.h" +#include "../cMonster.h" +#include "../UI/Window.h" + + + + + +#define HANDLE_PACKET_READ(Proc, Type, Var) \ + Type Var; \ + { \ + if (!m_ReceivedData.Proc(Var)) \ + { \ + return PARSE_INCOMPLETE; \ + } \ + } + + + + +typedef unsigned char Byte; + + + + + +using namespace CryptoPP; + + + + + +const int MAX_ENC_LEN = 512; // Maximum size of the encrypted message; should be 128, but who knows... + + + + + +enum +{ + PACKET_KEEP_ALIVE = 0x00, + PACKET_LOGIN = 0x01, + PACKET_ENTITY_EQUIPMENT = 0x05, + PACKET_COMPASS = 0x06, + PACKET_PLAYER_SPAWN = 0x14, + PACKET_SPAWN_MOB = 0x18, + PACKET_DESTROY_ENTITIES = 0x1d, + PACKET_CHUNK_DATA = 0x33, + PACKET_BLOCK_CHANGE = 0x35, + PACKET_BLOCK_ACTION = 0x36, + PACKET_SOUND_EFFECT = 0x3e +} ; + + + + + +// Converts a raw 160-bit SHA1 digest into a Java Hex representation +// According to http://wiki.vg/wiki/index.php?title=Protocol_Encryption&oldid=2802 +static void DigestToJava(byte a_Digest[20], AString & a_Out) +{ + bool IsNegative = (a_Digest[0] >= 0x80); + if (IsNegative) + { + // Two's complement: + bool carry = true; // Add one to the whole number + for (int i = 19; i >= 0; i--) + { + a_Digest[i] = ~a_Digest[i]; + if (carry) + { + carry = (a_Digest[i] == 0xff); + a_Digest[i]++; + } + } + } + a_Out.clear(); + a_Out.reserve(40); + for (int i = 0; i < 20; i++) + { + AppendPrintf(a_Out, "%02x", a_Digest[i]); + } + while ((a_Out.length() > 0) && (a_Out[0] == '0')) + { + a_Out.erase(0, 1); + } + if (IsNegative) + { + a_Out.insert(0, "-"); + } +} + + + + + +/* +// Self-test the hash formatting for known values: +// sha1(Notch) : 4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48 +// sha1(jeb_) : -7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1 +// sha1(simon) : 88e16a1019277b15d58faf0541e11910eb756f6 + +class Test +{ +public: + Test(void) + { + AString DigestNotch, DigestJeb, DigestSimon; + byte Digest[20]; + CryptoPP::SHA1 Checksum; + Checksum.Update((const byte *)"Notch", 5); + Checksum.Final(Digest); + DigestToJava(Digest, DigestNotch); + Checksum.Restart(); + Checksum.Update((const byte *)"jeb_", 4); + Checksum.Final(Digest); + DigestToJava(Digest, DigestJeb); + Checksum.Restart(); + Checksum.Update((const byte *)"simon", 5); + Checksum.Final(Digest); + DigestToJava(Digest, DigestSimon); + printf("Notch: \"%s\"", DigestNotch.c_str()); + printf("jeb_: \"%s\"", DigestJeb.c_str()); + printf("simon: \"%s\"", DigestSimon.c_str()); + } +} test; +*/ + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cProtocol132: + +cProtocol132::cProtocol132(cClientHandle * a_Client) : + super(a_Client), + m_IsEncrypted(false) +{ +} + + + + + +cProtocol132::~cProtocol132() +{ + if (!m_DataToSend.empty()) + { + LOGD("There are %d unsent bytes while deleting cProtocol132", m_DataToSend.size()); + } +} + + + + + +void cProtocol132::DataReceived(const char * a_Data, int a_Size) +{ + if (m_IsEncrypted) + { + byte Decrypted[512]; + while (a_Size > 0) + { + int NumBytes = (a_Size > sizeof(Decrypted)) ? sizeof(Decrypted) : a_Size; + m_Decryptor.ProcessData(Decrypted, (byte *)a_Data, NumBytes); + super::DataReceived((const char *)Decrypted, NumBytes); + a_Size -= NumBytes; + a_Data += NumBytes; + } + } + else + { + super::DataReceived(a_Data, a_Size); + } +} + + + + + +void cProtocol132::SendBlockAction(int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType) +{ + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_BLOCK_ACTION); + WriteInt (a_BlockX); + WriteShort((short)a_BlockY); + WriteInt (a_BlockZ); + WriteByte (a_Byte1); + WriteByte (a_Byte2); + WriteShort(a_BlockType); + Flush(); +} + + + + + +void cProtocol132::SendBlockChange(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) +{ + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_BLOCK_CHANGE); + WriteInt (a_BlockX); + WriteByte ((unsigned char)a_BlockY); + WriteInt (a_BlockZ); + WriteShort(a_BlockType); + WriteByte (a_BlockMeta); + Flush(); +} + + + + + +void cProtocol132::SendChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer) +{ + cCSLock Lock(m_CSPacket); + + // Pre-chunk not used in 1.3.2. Finally. + + // Send the chunk data: + AString Serialized = a_Serializer.Serialize(cChunkDataSerializer::RELEASE_1_3_2); + WriteByte(PACKET_CHUNK_DATA); + WriteInt (a_ChunkX); + WriteInt (a_ChunkZ); + SendData(Serialized.data(), Serialized.size()); + Flush(); +} + + + + + +void cProtocol132::SendDestroyEntity(const cEntity & a_Entity) +{ + cCSLock Lock(m_CSPacket); + WriteByte(PACKET_DESTROY_ENTITIES); + WriteByte(1); // entity count + WriteInt (a_Entity.GetUniqueID()); + Flush(); +} + + + + + +void cProtocol132::SendEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item) +{ + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_ENTITY_EQUIPMENT); + WriteInt (a_Entity.GetUniqueID()); + WriteShort(a_SlotNum); + WriteItem (a_Item); + Flush(); +} + + + + + +void cProtocol132::SendKeepAlive(int a_PingID) +{ + cCSLock Lock(m_CSPacket); + WriteByte(PACKET_KEEP_ALIVE); + WriteInt (a_PingID); + Flush(); +} + + + + + +void cProtocol132::SendLogin(const cPlayer & a_Player, const cWorld & a_World) +{ + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_LOGIN); + WriteInt (a_Player.GetUniqueID()); // EntityID of the player + WriteString("default"); // Level type + WriteByte ((int)a_Player.GetGameMode()); + WriteByte (0); // TODO: Dimension (Nether / Overworld / End) + WriteByte (2); // TODO: Difficulty + WriteByte (0); // Unused, used to be world height + WriteByte (8); // Client list width or something + Flush(); + + SendCompass(a_World); + + // Send the initial position (so that confirmation works, FS #245): + SendPlayerMoveLook(); +} + + + + + +void cProtocol132::SendPlayerSpawn(const cPlayer & a_Player) +{ + const cItem & HeldItem = a_Player.GetEquippedItem(); + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_PLAYER_SPAWN); + WriteInt (a_Player.GetUniqueID()); + WriteString(a_Player.GetName()); + WriteInt ((int)(a_Player.GetPosX() * 32)); + WriteInt ((int)(a_Player.GetPosY() * 32)); + WriteInt ((int)(a_Player.GetPosZ() * 32)); + WriteByte ((char)((a_Player.GetRot().x / 360.f) * 256)); + WriteByte ((char)((a_Player.GetRot().y / 360.f) * 256)); + WriteShort (HeldItem.IsEmpty() ? 0 : HeldItem.m_ItemType); + // Player metadata: just use a default metadata value, since the client doesn't like starting without any metadata: + WriteByte (0); // Index 0, byte (flags) + WriteByte (0); // Flags, empty + WriteByte (0x7f); // End of metadata + Flush(); +} + + + + + +void cProtocol132::SendSoundEffect(const AString & a_SoundName, int a_SrcX, int a_SrcY, int a_SrcZ, float a_Volume, float a_Pitch) +{ + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_SOUND_EFFECT); + WriteString (a_SoundName); + WriteInt (a_SrcX); + WriteInt (a_SrcY); + WriteInt (a_SrcZ); + WriteFloat (a_Volume); + WriteByte ((char)(a_Pitch * 63.0f)); + Flush(); +} + + + + + +void cProtocol132::SendSpawnMob(const cMonster & a_Mob) +{ + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_SPAWN_MOB); + WriteInt (a_Mob.GetUniqueID()); + WriteByte (a_Mob.GetMobType()); + WriteVectorI((Vector3i)(a_Mob.GetPosition() * 32)); + WriteByte (0); // yaw + WriteByte (0); // pitch + WriteByte (0); // head yaw + WriteShort (0); // Velocity Z + WriteShort (0); // Velocity X + WriteShort (0); // Velocity Y + AString MetaData = GetEntityMetaData(a_Mob); + SendData (MetaData.data(), MetaData.size()); + Flush(); +} + + + + + +void cProtocol132::SendUnloadChunk(int a_ChunkX, int a_ChunkZ) +{ + // Not used in 1.3.2 + // Does it unload chunks on its own? +} + + + + + +void cProtocol132::SendWholeInventory(const cWindow & a_Window) +{ + // 1.3.2 requires player inventory slots to be sent as SetSlot packets, + // otherwise it sometimes fails to update the window + super::SendWholeInventory(a_Window); + const cItem * Slots = m_Client->GetPlayer()->GetInventory().GetSlots(); + int BaseOffset = a_Window.GetNumSlots() - cInventory::c_NumSlots + cInventory::c_MainOffset; // the number of non-inventory slots the window has; inventory follows + char WindowID = a_Window.GetWindowID(); + for (int i = 0; i < cInventory::c_NumSlots - cInventory::c_MainOffset; i++) + { + SendInventorySlot(WindowID, BaseOffset + i, Slots[i + cInventory::c_MainOffset]); + } // for i - Slots[] + // Send even the item being dragged: + SendInventorySlot(-1, -1, m_Client->GetPlayer()->GetDraggingItem()); +} + + + + + +AString cProtocol132::GetAuthServerID(void) +{ + // http://wiki.vg/wiki/index.php?title=Session&oldid=2615 + // Server uses SHA1 to mix ServerID, Client secret and server public key together + // The mixing is done in StartEncryption, the result is in m_AuthServerID + + return m_AuthServerID; +} + + + + + +int cProtocol132::ParsePacket(unsigned char a_PacketType) +{ + switch (a_PacketType) + { + default: return super::ParsePacket(a_PacketType); // off-load previously known packets into cProtocol125 + case 0xcc: return ParseLocaleViewDistance(); + case 0xcd: return ParseClientStatuses(); + case 0xfc: return ParseEncryptionKeyResponse(); + } +} + + + + + +int cProtocol132::ParseBlockPlace(void) +{ + HANDLE_PACKET_READ(ReadBEInt, int, PosX); + HANDLE_PACKET_READ(ReadByte, Byte, PosY); + HANDLE_PACKET_READ(ReadBEInt, int, PosZ); + HANDLE_PACKET_READ(ReadChar, char, Direction); + + cItem HeldItem; + int res = ParseItem(HeldItem); + if (res < 0) + { + return res; + } + + HANDLE_PACKET_READ(ReadChar, char, CursorX); + HANDLE_PACKET_READ(ReadChar, char, CursorY); + HANDLE_PACKET_READ(ReadChar, char, CursorZ); + + m_Client->HandleBlockPlace(PosX, PosY, PosZ, Direction, HeldItem); + return PARSE_OK; +} + + + + + +int cProtocol132::ParseHandshake(void) +{ + HANDLE_PACKET_READ(ReadByte, Byte, ProtocolVersion); + HANDLE_PACKET_READ(ReadBEUTF16String16, AString, Username); + HANDLE_PACKET_READ(ReadBEUTF16String16, AString, ServerHost); + HANDLE_PACKET_READ(ReadBEInt, int, ServerPort); + m_Username = Username; + + if (!m_Client->HandleHandshake( m_Username )) + { + return PARSE_OK; // Player is not allowed into the server + } + + // Send a 0xFD Encryption Key Request http://wiki.vg/Protocol#0xFD + CryptoPP::StringSink sink(m_ServerPublicKey); // GCC won't allow inline instantiation in the following line, damned temporary refs + cRoot::Get()->GetServer()->GetPublicKey().Save(sink); + SendEncryptionKeyRequest(); + + return PARSE_OK; +} + + + + + +int cProtocol132::ParseClientStatuses(void) +{ + HANDLE_PACKET_READ(ReadByte, byte, Status); + m_Client->HandleLogin(39, m_Username); + return PARSE_OK; +} + + + + + +int cProtocol132::ParseEncryptionKeyResponse(void) +{ + HANDLE_PACKET_READ(ReadBEShort, short, EncKeyLength); + AString EncKey; + if (!m_ReceivedData.ReadString(EncKey, EncKeyLength)) + { + return PARSE_INCOMPLETE; + } + HANDLE_PACKET_READ(ReadBEShort, short, EncNonceLength); + AString EncNonce; + if (!m_ReceivedData.ReadString(EncNonce, EncNonceLength)) + { + return PARSE_INCOMPLETE; + } + if ((EncKeyLength > MAX_ENC_LEN) || (EncNonceLength > MAX_ENC_LEN)) + { + LOGD("Too long encryption"); + m_Client->Kick("Hacked client"); + return PARSE_OK; + } + + HandleEncryptionKeyResponse(EncKey, EncNonce); + return PARSE_OK; +} + + + + + +int cProtocol132::ParseLocaleViewDistance(void) +{ + HANDLE_PACKET_READ(ReadBEUTF16String16, AString, Locale); + HANDLE_PACKET_READ(ReadChar, char, ViewDistance); + HANDLE_PACKET_READ(ReadChar, char, ChatFlags); + HANDLE_PACKET_READ(ReadChar, char, ClientDifficulty); + // TODO: m_Client->HandleLocale(Locale); + // TODO: m_Client->HandleViewDistance(ViewDistance); + // TODO: m_Client->HandleChatFlags(ChatFlags); + // Ignoring client difficulty + return PARSE_OK; +} + + + + + +int cProtocol132::ParseLogin(void) +{ + // Login packet not used in 1.3.2 + return PARSE_ERROR; +} + + + + + +int cProtocol132::ParsePlayerAbilities(void) +{ + HANDLE_PACKET_READ(ReadBool, bool, Flags); + HANDLE_PACKET_READ(ReadChar, char, FlyingSpeed); + HANDLE_PACKET_READ(ReadChar, char, WalkingSpeed); + // TODO: m_Client->HandlePlayerAbilities(...); + return PARSE_OK; +} + + + + + +void cProtocol132::SendData(const char * a_Data, int a_Size) +{ + m_DataToSend.append(a_Data, a_Size); +} + + + + + +void cProtocol132::Flush(void) +{ + ASSERT(m_CSPacket.IsLockedByCurrentThread()); // Did all packets lock the CS properly? + + if (m_DataToSend.empty()) + { + LOGD("Flushing empty"); + return; + } + const char * a_Data = m_DataToSend.data(); + int a_Size = m_DataToSend.size(); + if (m_IsEncrypted) + { + byte Encrypted[8192]; // Larger buffer, we may be sending lots of data (chunks) + while (a_Size > 0) + { + int NumBytes = (a_Size > sizeof(Encrypted)) ? sizeof(Encrypted) : a_Size; + m_Encryptor.ProcessData(Encrypted, (byte *)a_Data, NumBytes); + super::SendData((const char *)Encrypted, NumBytes); + a_Size -= NumBytes; + a_Data += NumBytes; + } + } + else + { + super::SendData(a_Data, a_Size); + } + m_DataToSend.clear(); +} + + + + + +void cProtocol132::WriteItem(const cItem & a_Item) +{ + short ItemType = a_Item.m_ItemType; + ASSERT(ItemType >= -1); // Check validity of packets in debug runtime + if (ItemType <= 0) + { + // Fix, to make sure no invalid values are sent. + ItemType = -1; + } + + if (a_Item.IsEmpty()) + { + WriteShort(-1); + return; + } + + WriteShort(ItemType); + WriteByte (a_Item.m_ItemCount); + WriteShort(a_Item.m_ItemDamage); + + // TODO: Implement enchantments + WriteShort(-1); +} + + + + + +int cProtocol132::ParseItem(cItem & a_Item) +{ + HANDLE_PACKET_READ(ReadBEShort, short, ItemType); + + if (ItemType <= -1) + { + a_Item.Empty(); + return PARSE_OK; + } + a_Item.m_ItemType = ItemType; + + HANDLE_PACKET_READ(ReadChar, char, ItemCount); + HANDLE_PACKET_READ(ReadBEShort, short, ItemDamage); + a_Item.m_ItemCount = ItemCount; + // a_Item.m_ItemDamage = ItemDamage; + if (ItemCount <= 0) + { + a_Item.Empty(); + } + + HANDLE_PACKET_READ(ReadBEShort, short, EnchantNumBytes); + if (EnchantNumBytes <= 0) + { + return PARSE_OK; + } + + // TODO: Enchantment not implemented yet! + if (!m_ReceivedData.SkipRead(EnchantNumBytes)) + { + return PARSE_INCOMPLETE; + } + + return PARSE_OK; +} + + + + + +void cProtocol132::SendCompass(const cWorld & a_World) +{ + cCSLock Lock(m_CSPacket); + WriteByte(PACKET_COMPASS); + WriteInt((int)(a_World.GetSpawnX())); + WriteInt((int)(a_World.GetSpawnY())); + WriteInt((int)(a_World.GetSpawnZ())); + Flush(); +} + + + + + +void cProtocol132::SendEncryptionKeyRequest(void) +{ + cCSLock Lock(m_CSPacket); + WriteByte((char)0xfd); + WriteString(cRoot::Get()->GetServer()->GetServerID()); + WriteShort((short)m_ServerPublicKey.size()); + SendData(m_ServerPublicKey.data(), m_ServerPublicKey.size()); + WriteShort(4); + WriteInt((int)(intptr_t)this); // Using 'this' as the cryptographic nonce, so that we don't have to generate one each time :) + Flush(); +} + + + + + +void cProtocol132::HandleEncryptionKeyResponse(const AString & a_EncKey, const AString & a_EncNonce) +{ + // Decrypt EncNonce using privkey + RSAES::Decryptor rsaDecryptor(cRoot::Get()->GetServer()->GetPrivateKey()); + time_t CurTime = time(NULL); + CryptoPP::RandomPool rng; + rng.Put((const byte *)&CurTime, sizeof(CurTime)); + byte DecryptedNonce[MAX_ENC_LEN]; + DecodingResult res = rsaDecryptor.Decrypt(rng, (const byte *)a_EncNonce.data(), a_EncNonce.size(), DecryptedNonce); + if (!res.isValidCoding || (res.messageLength != 4)) + { + LOGD("Bad nonce length"); + m_Client->Kick("Hacked client"); + return; + } + if (ntohl(*((int *)DecryptedNonce)) != (unsigned)(uintptr_t)this) + { + LOGD("Bad nonce value"); + m_Client->Kick("Hacked client"); + return; + } + + // Decrypt the symmetric encryption key using privkey: + byte DecryptedKey[MAX_ENC_LEN]; + res = rsaDecryptor.Decrypt(rng, (const byte *)a_EncKey.data(), a_EncKey.size(), DecryptedKey); + if (!res.isValidCoding || (res.messageLength != 16)) + { + LOGD("Bad key length"); + m_Client->Kick("Hacked client"); + return; + } + + { + // Send encryption key response: + cCSLock Lock(m_CSPacket); + WriteByte((char)0xfc); + WriteShort(0); + WriteShort(0); + Flush(); + } + + StartEncryption(DecryptedKey); + return; +} + + + + + +void cProtocol132::StartEncryption(const byte * a_Key) +{ + m_Encryptor.SetKey(a_Key, 16, MakeParameters(Name::IV(), ConstByteArrayParameter(a_Key, 16))(Name::FeedbackSize(), 1)); + m_Decryptor.SetKey(a_Key, 16, MakeParameters(Name::IV(), ConstByteArrayParameter(a_Key, 16))(Name::FeedbackSize(), 1)); + m_IsEncrypted = true; + + // Prepare the m_AuthServerID: + CryptoPP::SHA1 Checksum; + AString ServerID = cRoot::Get()->GetServer()->GetServerID(); + Checksum.Update((const byte *)ServerID.c_str(), ServerID.length()); + Checksum.Update(a_Key, 16); + Checksum.Update((const byte *)m_ServerPublicKey.c_str(), m_ServerPublicKey.length()); + byte Digest[20]; + Checksum.Final(Digest); + DigestToJava(Digest, m_AuthServerID); +} + + + + -- cgit v1.2.3