diff options
author | Alexander Harkness <bearbin@gmail.com> | 2013-07-29 13:13:03 +0200 |
---|---|---|
committer | Alexander Harkness <bearbin@gmail.com> | 2013-07-29 13:13:03 +0200 |
commit | 53e22b11857fed62e2313d6d84d90f88ed412ffb (patch) | |
tree | c61e56725da7dff0154d566722651e2c39c9d6c6 /source/Protocol/Protocol132.cpp | |
parent | WebAdmin: Removed the duplicate memory usage querying (diff) | |
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Diffstat (limited to 'source/Protocol/Protocol132.cpp')
-rw-r--r-- | source/Protocol/Protocol132.cpp | 1804 |
1 files changed, 902 insertions, 902 deletions
diff --git a/source/Protocol/Protocol132.cpp b/source/Protocol/Protocol132.cpp index f34401b55..9a985ec1f 100644 --- a/source/Protocol/Protocol132.cpp +++ b/source/Protocol/Protocol132.cpp @@ -1,902 +1,902 @@ -
-// Protocol132.cpp
-
-// Implements the cProtocol132 class representing the release 1.3.2 protocol (#39)
-
-#include "Globals.h"
-#include "Protocol132.h"
-#include "../Root.h"
-#include "../Server.h"
-#include "../ClientHandle.h"
-#include "../../CryptoPP/randpool.h"
-#include "../Item.h"
-#include "ChunkDataSerializer.h"
-#include "../Player.h"
-#include "../Mobs/Monster.h"
-#include "../UI/Window.h"
-#include "../Pickup.h"
-#include "../WorldStorage/FastNBT.h"
-#include "../StringCompression.h"
-
-
-
-
-
-#define HANDLE_PACKET_READ(Proc, Type, Var) \
- Type Var; \
- { \
- if (!m_ReceivedData.Proc(Var)) \
- { \
- m_ReceivedData.CheckValid(); \
- return PARSE_INCOMPLETE; \
- } \
- m_ReceivedData.CheckValid(); \
- }
-
-
-
-
-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_COLLECT_PICKUP = 0x16,
- PACKET_SPAWN_MOB = 0x18,
- PACKET_DESTROY_ENTITIES = 0x1d,
- PACKET_CHUNK_DATA = 0x33,
- PACKET_BLOCK_CHANGE = 0x35,
- PACKET_BLOCK_ACTION = 0x36,
- PACKET_BLOCK_BREAK_ANIM = 0x37,
- PACKET_SOUND_EFFECT = 0x3e,
- PACKET_SOUND_PARTICLE_EFFECT = 0x3d,
- PACKET_LOCALE_VIEW_DISTANCE = 0xcc,
- PACKET_CLIENT_STATUSES = 0xcd,
- PACKET_ENCRYPTION_KEY_RESP = 0xfc,
-} ;
-
-
-
-
-
-// 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::SendBlockBreakAnim(int a_entityID, int a_BlockX, int a_BlockY, int a_BlockZ, char stage)
-{
- cCSLock Lock(m_CSPacket);
- WriteByte (PACKET_BLOCK_BREAK_ANIM);
- WriteInt (a_entityID);
- WriteInt (a_BlockX);
- WriteInt (a_BlockY);
- WriteInt (a_BlockZ);
- WriteByte (stage);
- 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::SendCollectPickup(const cPickup & a_Pickup, const cPlayer & a_Player)
-{
- cCSLock Lock(m_CSPacket);
- WriteByte(PACKET_COLLECT_PICKUP);
- WriteInt (a_Pickup.GetUniqueID());
- WriteInt (a_Player.GetUniqueID());
- Flush();
-
- // Also send the "pop" sound effect with a somewhat random pitch (fast-random using EntityID ;)
- SendSoundEffect(
- "random.pop",
- (int)(a_Pickup.GetPosX() * 8), (int)(a_Pickup.GetPosY() * 8), (int)(a_Pickup.GetPosZ() * 8),
- 0.5, (float)(0.75 + ((float)((a_Pickup.GetUniqueID() * 23) % 32)) / 64)
- );
-}
-
-
-
-
-
-void cProtocol132::SendDestroyEntity(const cEntity & a_Entity)
-{
- if (a_Entity.GetUniqueID() == m_Client->GetPlayer()->GetUniqueID())
- {
- // Do not send "destroy self" to the client, the client would crash (FS #254)
- return;
- }
-
- 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::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 ((Byte)(a_World.GetDimension()));
- 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::SendSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data)
-{
- cCSLock Lock(m_CSPacket);
- WriteByte(PACKET_SOUND_PARTICLE_EFFECT);
- WriteInt (a_EffectID);
- WriteInt (a_SrcX / 8);
- WriteByte(a_SrcY / 8);
- WriteInt (a_SrcZ / 8);
- WriteInt (a_Data);
- 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 ((Byte)((a_Mob.GetRotation() / 360.f) * 256));
- WriteByte ((Byte)((a_Mob.GetPitch() / 360.f) * 256));
- WriteByte ((Byte)((a_Mob.GetHeadYaw() / 360.f) * 256));
- WriteShort ((short)(a_Mob.GetSpeedX() * 400));
- WriteShort ((short)(a_Mob.GetSpeedY() * 400));
- WriteShort ((short)(a_Mob.GetSpeedZ() * 400));
- 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
-
- // Send the entire window:
- super::SendWholeInventory(a_Window);
-
- // Send the player inventory and hotbar:
- const cInventory & Inventory = m_Client->GetPlayer()->GetInventory();
- int BaseOffset = a_Window.GetNumSlots() - (cInventory::invNumSlots - cInventory::invInventoryOffset); // Number of non-inventory slots
- char WindowID = a_Window.GetWindowID();
- for (int i = 0; i < cInventory::invInventoryCount; i++)
- {
- SendInventorySlot(WindowID, BaseOffset + i, Inventory.GetInventorySlot(i));
- } // for i - Inventory[]
- BaseOffset += cInventory::invInventoryCount;
- for (int i = 0; i < cInventory::invHotbarCount; i++)
- {
- SendInventorySlot(WindowID, BaseOffset + i, Inventory.GetHotbarSlot(i));
- } // for i - Hotbar[]
-
- // 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 PACKET_LOCALE_VIEW_DISTANCE: return ParseLocaleViewDistance();
- case PACKET_CLIENT_STATUSES: return ParseClientStatuses();
- case PACKET_ENCRYPTION_KEY_RESP: 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, BlockFace);
-
- 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->HandleRightClick(PosX, PosY, PosZ, BlockFace, CursorX, CursorY, CursorZ, 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);
- if ((Status & 1) == 0)
- {
- m_Client->HandleLogin(39, m_Username);
- }
- else
- {
- m_Client->HandleRespawn();
- }
- 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);
-
- if (a_Item.m_Enchantments.IsEmpty())
- {
- WriteShort(-1);
- return;
- }
-
- // Send the enchantments:
- cFastNBTWriter Writer;
- const char * TagName = (a_Item.m_ItemType == E_ITEM_BOOK) ? "StoredEnchantments" : "ench";
- a_Item.m_Enchantments.WriteToNBTCompound(Writer, TagName);
- Writer.Finish();
- AString Compressed;
- CompressStringGZIP(Writer.GetResult().data(), Writer.GetResult().size(), Compressed);
- WriteShort(Compressed.size());
- SendData(Compressed.data(), Compressed.size());
-}
-
-
-
-
-
-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, MetadataLength);
- if (MetadataLength <= 0)
- {
- return PARSE_OK;
- }
-
- // Read the metadata
- AString Metadata;
- Metadata.resize(MetadataLength);
- if (!m_ReceivedData.ReadBuf((void *)Metadata.data(), MetadataLength))
- {
- return PARSE_INCOMPLETE;
- }
-
- return ParseItemMetadata(a_Item, Metadata);
-}
-
-
-
-
-
-int cProtocol132::ParseItemMetadata(cItem & a_Item, const AString & a_Metadata)
-{
- // Uncompress the GZIPped data:
- AString Uncompressed;
- if (UncompressStringGZIP(a_Metadata.data(), a_Metadata.size(), Uncompressed) != Z_OK)
- {
- AString HexDump;
- CreateHexDump(HexDump, a_Metadata.data(), a_Metadata.size(), 16);
- LOG("Cannot unGZIP item metadata:\n%s", HexDump.c_str());
- return PARSE_ERROR;
- }
-
- // Parse into NBT:
- cParsedNBT NBT(Uncompressed.data(), Uncompressed.size());
- if (!NBT.IsValid())
- {
- AString HexDump;
- CreateHexDump(HexDump, Uncompressed.data(), Uncompressed.size(), 16);
- LOG("Cannot parse NBT item metadata:\n%s", HexDump.c_str());
- return PARSE_ERROR;
- }
-
- // Load enchantments from the NBT:
- for (int tag = NBT.GetFirstChild(NBT.GetRoot()); tag >= 0; tag = NBT.GetNextSibling(tag))
- {
- if (
- (NBT.GetType(tag) == TAG_List) &&
- (
- (NBT.GetName(tag) == "ench") ||
- (NBT.GetName(tag) == "StoredEnchantments")
- )
- )
- {
- a_Item.m_Enchantments.ParseFromNBT(NBT, tag);
- }
- }
-
- 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<PKCS1v15>::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);
-}
-
-
-
-
+ +// Protocol132.cpp + +// Implements the cProtocol132 class representing the release 1.3.2 protocol (#39) + +#include "Globals.h" +#include "Protocol132.h" +#include "../Root.h" +#include "../Server.h" +#include "../ClientHandle.h" +#include "../../CryptoPP/randpool.h" +#include "../Item.h" +#include "ChunkDataSerializer.h" +#include "../Player.h" +#include "../Mobs/Monster.h" +#include "../UI/Window.h" +#include "../Pickup.h" +#include "../WorldStorage/FastNBT.h" +#include "../StringCompression.h" + + + + + +#define HANDLE_PACKET_READ(Proc, Type, Var) \ + Type Var; \ + { \ + if (!m_ReceivedData.Proc(Var)) \ + { \ + m_ReceivedData.CheckValid(); \ + return PARSE_INCOMPLETE; \ + } \ + m_ReceivedData.CheckValid(); \ + } + + + + +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_COLLECT_PICKUP = 0x16, + PACKET_SPAWN_MOB = 0x18, + PACKET_DESTROY_ENTITIES = 0x1d, + PACKET_CHUNK_DATA = 0x33, + PACKET_BLOCK_CHANGE = 0x35, + PACKET_BLOCK_ACTION = 0x36, + PACKET_BLOCK_BREAK_ANIM = 0x37, + PACKET_SOUND_EFFECT = 0x3e, + PACKET_SOUND_PARTICLE_EFFECT = 0x3d, + PACKET_LOCALE_VIEW_DISTANCE = 0xcc, + PACKET_CLIENT_STATUSES = 0xcd, + PACKET_ENCRYPTION_KEY_RESP = 0xfc, +} ; + + + + + +// 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::SendBlockBreakAnim(int a_entityID, int a_BlockX, int a_BlockY, int a_BlockZ, char stage) +{ + cCSLock Lock(m_CSPacket); + WriteByte (PACKET_BLOCK_BREAK_ANIM); + WriteInt (a_entityID); + WriteInt (a_BlockX); + WriteInt (a_BlockY); + WriteInt (a_BlockZ); + WriteByte (stage); + 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::SendCollectPickup(const cPickup & a_Pickup, const cPlayer & a_Player) +{ + cCSLock Lock(m_CSPacket); + WriteByte(PACKET_COLLECT_PICKUP); + WriteInt (a_Pickup.GetUniqueID()); + WriteInt (a_Player.GetUniqueID()); + Flush(); + + // Also send the "pop" sound effect with a somewhat random pitch (fast-random using EntityID ;) + SendSoundEffect( + "random.pop", + (int)(a_Pickup.GetPosX() * 8), (int)(a_Pickup.GetPosY() * 8), (int)(a_Pickup.GetPosZ() * 8), + 0.5, (float)(0.75 + ((float)((a_Pickup.GetUniqueID() * 23) % 32)) / 64) + ); +} + + + + + +void cProtocol132::SendDestroyEntity(const cEntity & a_Entity) +{ + if (a_Entity.GetUniqueID() == m_Client->GetPlayer()->GetUniqueID()) + { + // Do not send "destroy self" to the client, the client would crash (FS #254) + return; + } + + 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::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 ((Byte)(a_World.GetDimension())); + 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::SendSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data) +{ + cCSLock Lock(m_CSPacket); + WriteByte(PACKET_SOUND_PARTICLE_EFFECT); + WriteInt (a_EffectID); + WriteInt (a_SrcX / 8); + WriteByte(a_SrcY / 8); + WriteInt (a_SrcZ / 8); + WriteInt (a_Data); + 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 ((Byte)((a_Mob.GetRotation() / 360.f) * 256)); + WriteByte ((Byte)((a_Mob.GetPitch() / 360.f) * 256)); + WriteByte ((Byte)((a_Mob.GetHeadYaw() / 360.f) * 256)); + WriteShort ((short)(a_Mob.GetSpeedX() * 400)); + WriteShort ((short)(a_Mob.GetSpeedY() * 400)); + WriteShort ((short)(a_Mob.GetSpeedZ() * 400)); + 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 + + // Send the entire window: + super::SendWholeInventory(a_Window); + + // Send the player inventory and hotbar: + const cInventory & Inventory = m_Client->GetPlayer()->GetInventory(); + int BaseOffset = a_Window.GetNumSlots() - (cInventory::invNumSlots - cInventory::invInventoryOffset); // Number of non-inventory slots + char WindowID = a_Window.GetWindowID(); + for (int i = 0; i < cInventory::invInventoryCount; i++) + { + SendInventorySlot(WindowID, BaseOffset + i, Inventory.GetInventorySlot(i)); + } // for i - Inventory[] + BaseOffset += cInventory::invInventoryCount; + for (int i = 0; i < cInventory::invHotbarCount; i++) + { + SendInventorySlot(WindowID, BaseOffset + i, Inventory.GetHotbarSlot(i)); + } // for i - Hotbar[] + + // 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 PACKET_LOCALE_VIEW_DISTANCE: return ParseLocaleViewDistance(); + case PACKET_CLIENT_STATUSES: return ParseClientStatuses(); + case PACKET_ENCRYPTION_KEY_RESP: 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, BlockFace); + + 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->HandleRightClick(PosX, PosY, PosZ, BlockFace, CursorX, CursorY, CursorZ, 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); + if ((Status & 1) == 0) + { + m_Client->HandleLogin(39, m_Username); + } + else + { + m_Client->HandleRespawn(); + } + 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); + + if (a_Item.m_Enchantments.IsEmpty()) + { + WriteShort(-1); + return; + } + + // Send the enchantments: + cFastNBTWriter Writer; + const char * TagName = (a_Item.m_ItemType == E_ITEM_BOOK) ? "StoredEnchantments" : "ench"; + a_Item.m_Enchantments.WriteToNBTCompound(Writer, TagName); + Writer.Finish(); + AString Compressed; + CompressStringGZIP(Writer.GetResult().data(), Writer.GetResult().size(), Compressed); + WriteShort(Compressed.size()); + SendData(Compressed.data(), Compressed.size()); +} + + + + + +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, MetadataLength); + if (MetadataLength <= 0) + { + return PARSE_OK; + } + + // Read the metadata + AString Metadata; + Metadata.resize(MetadataLength); + if (!m_ReceivedData.ReadBuf((void *)Metadata.data(), MetadataLength)) + { + return PARSE_INCOMPLETE; + } + + return ParseItemMetadata(a_Item, Metadata); +} + + + + + +int cProtocol132::ParseItemMetadata(cItem & a_Item, const AString & a_Metadata) +{ + // Uncompress the GZIPped data: + AString Uncompressed; + if (UncompressStringGZIP(a_Metadata.data(), a_Metadata.size(), Uncompressed) != Z_OK) + { + AString HexDump; + CreateHexDump(HexDump, a_Metadata.data(), a_Metadata.size(), 16); + LOG("Cannot unGZIP item metadata:\n%s", HexDump.c_str()); + return PARSE_ERROR; + } + + // Parse into NBT: + cParsedNBT NBT(Uncompressed.data(), Uncompressed.size()); + if (!NBT.IsValid()) + { + AString HexDump; + CreateHexDump(HexDump, Uncompressed.data(), Uncompressed.size(), 16); + LOG("Cannot parse NBT item metadata:\n%s", HexDump.c_str()); + return PARSE_ERROR; + } + + // Load enchantments from the NBT: + for (int tag = NBT.GetFirstChild(NBT.GetRoot()); tag >= 0; tag = NBT.GetNextSibling(tag)) + { + if ( + (NBT.GetType(tag) == TAG_List) && + ( + (NBT.GetName(tag) == "ench") || + (NBT.GetName(tag) == "StoredEnchantments") + ) + ) + { + a_Item.m_Enchantments.ParseFromNBT(NBT, tag); + } + } + + 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<PKCS1v15>::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); +} + + + + |