init protocol login

src/framework/net/connection.cpp

@@ -40,16 +40,26 @@ void Connection::poll()
     ioService.reset();
 }
 
-void Connection::connect(const std::string& host, uint16 port, const SimpleCallback& callback)
+void Connection::connect(const std::string& host, uint16 port, const SimpleCallback& connectCallback)
 {
-    m_connectCallback = callback;
+    m_connectCallback = connectCallback;
     m_connectionState = CONNECTION_STATE_RESOLVING;
 
     boost::asio::ip::tcp::resolver::query query(host, convert_cast<std::string>(port));
-    m_resolver.async_resolve(query, boost::bind(&Connection::onResolve, this, boost::asio::placeholders::error, boost::asio::placeholders::iterator));
+    m_resolver.async_resolve(query, boost::bind(&Connection::onResolve, shared_from_this(), boost::asio::placeholders::error, boost::asio::placeholders::iterator));
 
     m_timer.expires_from_now(boost::posix_time::seconds(2));
-    m_timer.async_wait(boost::bind(&Connection::onTimeout, this, boost::asio::placeholders::error));
+    m_timer.async_wait(boost::bind(&Connection::onTimeout, shared_from_this(), boost::asio::placeholders::error));
+}
+
+void Connection::send(OutputMessage *outputMessage)
+{
+    boost::asio::async_write(m_socket,
+                             boost::asio::buffer(outputMessage->getBuffer(), outputMessage->getMessageSize()),
+                             boost::bind(&Connection::onSend, shared_from_this(), boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
+
+    m_timer.expires_from_now(boost::posix_time::seconds(2));
+    m_timer.async_wait(boost::bind(&Connection::onTimeout, shared_from_this(), boost::asio::placeholders::error));
 }
 
 void Connection::onTimeout(const boost::system::error_code& error)
@@ -65,14 +75,15 @@ void Connection::onResolve(const boost::system::error_code& error, boost::asio::
     m_timer.cancel();
 
     if(error) {
-        g_dispatcher.addTask(boost::bind(m_errorCallback, error));
+        if(m_errorCallback)
+            g_dispatcher.addTask(boost::bind(m_errorCallback, error));
         return;
     }
 
-    m_socket.async_connect(*endpointIterator, boost::bind(&Connection::onConnect, this, boost::asio::placeholders::error));
+    m_socket.async_connect(*endpointIterator, boost::bind(&Connection::onConnect, shared_from_this(), boost::asio::placeholders::error));
 
     m_timer.expires_from_now(boost::posix_time::seconds(2));
-    m_timer.async_wait(boost::bind(&Connection::onTimeout, this, boost::asio::placeholders::error));
+    m_timer.async_wait(boost::bind(&Connection::onTimeout, shared_from_this(), boost::asio::placeholders::error));
 }
 
 void Connection::onConnect(const boost::system::error_code& error)
@@ -82,9 +93,73 @@ void Connection::onConnect(const boost::system::error_code& error)
     m_timer.cancel();
 
     if(error) {
-        g_dispatcher.addTask(boost::bind(m_errorCallback, error));
+        if(m_errorCallback)
+            g_dispatcher.addTask(boost::bind(m_errorCallback, error));
         return;
     }
 
     g_dispatcher.addTask(m_connectCallback);
+
+    // Start listening.
+    InputMessage *inputMessage = new InputMessage;
+    boost::asio::async_read(m_socket,
+                            boost::asio::buffer(inputMessage->getBuffer(), InputMessage::HEADER_LENGTH),
+                            boost::bind(&Connection::onRecvHeader, shared_from_this(), boost::asio::placeholders::error, inputMessage));
+}
+
+void Connection::onSend(const boost::system::error_code& error, size_t)
+{
+    logTrace();
+
+    m_timer.cancel();
+
+    if(error) {
+        if(m_errorCallback)
+            g_dispatcher.addTask(boost::bind(m_errorCallback, error));
+        return;
+    }
+}
+
+void Connection::onRecvHeader(const boost::system::error_code& error, InputMessage *inputMessage)
+{
+    logTrace();
+
+    if(error) {
+        if(m_errorCallback)
+            g_dispatcher.addTask(boost::bind(m_errorCallback, error));
+        return;
+    }
+
+    uint16 messageSize = inputMessage->getU16();
+    inputMessage->setMessageSize(messageSize);
+
+    boost::asio::async_read(m_socket,
+                            boost::asio::buffer(inputMessage->getBuffer() + InputMessage::CHECKSUM_POS, messageSize),
+                            boost::bind(&Connection::onRecvData, shared_from_this(), boost::asio::placeholders::error, inputMessage));
+}
+
+void Connection::onRecvData(const boost::system::error_code& error, InputMessage *inputMessage)
+{
+    logTrace();
+
+    if(error) {
+        if(m_errorCallback)
+            g_dispatcher.addTask(boost::bind(m_errorCallback, error));
+        return;
+    }
+
+    // call callback
+    if(m_recvCallback)
+        g_dispatcher.addTask(boost::bind(m_recvCallback, inputMessage));
+
+    // FIXME:
+    // TODO declare inside class? call onRecvHeader.
+    // this needs a remake
+    /*delete inputMessage;
+
+    inputMessage = new InputMessage;
+    boost::asio::async_read(m_socket,
+                            boost::asio::buffer(inputMessage->getBuffer(), InputMessage::HEADER_LENGTH),
+                            boost::bind(&Connection::onRecvHeader, shared_from_this(), boost::asio::placeholders::error, inputMessage));*/
+
 }

src/framework/net/connection.h

@@ -25,24 +25,33 @@
 #ifndef CONNECTION_H
 #define CONNECTION_H
 
+#include <net/inputmessage.h>
+#include <net/outputmessage.h>
 #include <prerequisites.h>
 #include <boost/asio.hpp>
 
 typedef boost::function<void(boost::system::error_code&)> ErrorCallback;
+typedef boost::function<void(InputMessage*)> RecvCallback;
 
-class Connection
+class Connection : public boost::enable_shared_from_this<Connection>, boost::noncopyable
 {
 public:
     Connection();
 
     static void poll();
 
-    void connect(const std::string& host, uint16 port, const SimpleCallback& callback);
+    void connect(const std::string& host, uint16 port, const SimpleCallback& connectCallback);
+    void send(OutputMessage *outputMessage);
+
     void setErrorCallback(const ErrorCallback& errorCallback) { m_errorCallback = errorCallback; }
+    void setRecvCallback(const RecvCallback& recvCallback) { m_recvCallback = recvCallback; }
 
     void onTimeout(const boost::system::error_code& error);
     void onResolve(const boost::system::error_code& error, boost::asio::ip::tcp::resolver::iterator endpointIterator);
     void onConnect(const boost::system::error_code& error);
+    void onSend(const boost::system::error_code& error, size_t);
+    void onRecvHeader(const boost::system::error_code& error, InputMessage *inputMessage);
+    void onRecvData(const boost::system::error_code& error, InputMessage *inputMessage);
 
     enum ConnectionState_t {
         CONNECTION_STATE_IDLE = 0,
@@ -53,6 +62,7 @@ public:
 
 private:
     ErrorCallback m_errorCallback;
+    RecvCallback m_recvCallback;
     SimpleCallback m_connectCallback;
     ConnectionState_t m_connectionState;
 

src/framework/net/inputmessage.cpp

@@ -32,7 +32,7 @@ InputMessage::InputMessage()
 void InputMessage::reset()
 {
     m_readPos = 0;
-    m_messageSize = 0;
+    m_messageSize = 2;
 }
 
 uint8 InputMessage::getU8()

src/framework/net/inputmessage.h

@@ -32,8 +32,12 @@ class InputMessage
 public:
     enum {
         BUFFER_MAXSIZE = 256,
+        HEADER_POS = 0,
         HEADER_LENGTH = 2,
-        CHECKSUM_LENGTH = 4
+        CHECKSUM_POS = 2,
+        CHECKSUM_LENGTH = 4,
+        DATA_POS = 6,
+        UNENCRYPTED_DATA_POS = 8
     };
 
     InputMessage();
@@ -46,13 +50,17 @@ public:
     uint64 getU64();
     std::string getString();
 
+    uint8 *getBuffer() { return m_buffer; }
+    uint16 getMessageSize() { return m_messageSize; }
+    void setMessageSize(uint16 messageSize) { m_messageSize = messageSize; }
+    bool end() { return m_readPos == m_messageSize; }
 
 private:
     bool canRead(int bytes);
 
-    uint16_t m_readPos;
+    uint16 m_readPos;
-    uint16_t m_messageSize;
+    uint16 m_messageSize;
-    uint8_t m_buffer[BUFFER_MAXSIZE];
+    uint8 m_buffer[BUFFER_MAXSIZE];
 };
 
 #endif

src/framework/net/outputmessage.cpp

@@ -31,7 +31,7 @@ OutputMessage::OutputMessage()
 
 void OutputMessage::reset()
 {
-    m_writePos = 0;
+    m_writePos = DATA_POS;
     m_messageSize = 0;
 }
 
@@ -92,6 +92,16 @@ void OutputMessage::addString(const std::string &value)
     addString(value.c_str());
 }
 
+void OutputMessage::addPaddingBytes(int bytes, uint8 byte)
+{
+    if(!canWrite(bytes))
+        return;
+
+    memset((void*)&m_buffer[m_writePos], byte, bytes);
+    m_writePos += bytes;
+    m_messageSize += bytes;
+}
+
 bool OutputMessage::canWrite(int bytes)
 {
     return (m_writePos + bytes <= BUFFER_MAXSIZE);

src/framework/net/outputmessage.h

@@ -31,7 +31,12 @@ class OutputMessage
 {
 public:
     enum {
-        BUFFER_MAXSIZE = 1024
+        BUFFER_MAXSIZE = 1024,
+        HEADER_POS = 0,
+        HEADER_LENGTH = 2,
+        CHECKSUM_POS = 2,
+        CHECKSUM_LENGTH = 4,
+        DATA_POS = 6
     };
 
     OutputMessage();
@@ -44,13 +49,18 @@ public:
     void addU64(uint64 value);
     void addString(const char* value);
     void addString(const std::string &value);
+    void addPaddingBytes(int bytes, uint8 byte = 0);
+
+    uint8 *getBuffer() { return m_buffer; }
+    uint16 getMessageSize() { return m_messageSize; }
+    void setWritePos(uint16 writePos) { m_writePos = writePos; }
 
 private:
     bool canWrite(int bytes);
 
-    uint16_t m_writePos;
+    uint16 m_writePos;
-    uint16_t m_messageSize;
+    uint16 m_messageSize;
-    uint8_t m_buffer[BUFFER_MAXSIZE];
+    uint8 m_buffer[BUFFER_MAXSIZE];
 };
 
 #endif

src/framework/net/protocol.cpp

@@ -28,6 +28,8 @@ Protocol::Protocol() :
         m_connection(new Connection)
 {
     m_connection->setErrorCallback(boost::bind(&Protocol::onError, this, _1));
+    m_connection->setRecvCallback(boost::bind(&Protocol::onRecv, this, _1));
+    m_xteaEncryptionEnabled = false;
 }
 
 void Protocol::connect(const std::string& host, uint16 port, const SimpleCallback& callback)
@@ -35,12 +37,128 @@ void Protocol::connect(const std::string& host, uint16 port, const SimpleCallbac
     m_connection->connect(host, port, callback);
 }
 
+void Protocol::send(OutputMessage *outputMessage)
+{
+    // Encrypt
+    if(m_xteaEncryptionEnabled)
+        xteaEncrypt(outputMessage);
+
+    // Set checksum
+    uint32 checksum = getAdlerChecksum(outputMessage->getBuffer() + OutputMessage::DATA_POS, outputMessage->getMessageSize());
+    outputMessage->setWritePos(OutputMessage::CHECKSUM_POS);
+    outputMessage->addU32(checksum);
+
+    // Set size
+    uint16 messageSize = outputMessage->getMessageSize();
+    outputMessage->setWritePos(OutputMessage::HEADER_POS);
+    outputMessage->addU16(messageSize);
+
+    // Send
+    m_connection->send(outputMessage);
+}
+
+void Protocol::onRecv(InputMessage *inputMessage)
+{
+    uint32 checksum = getAdlerChecksum(inputMessage->getBuffer() + InputMessage::DATA_POS, inputMessage->getMessageSize() - InputMessage::CHECKSUM_LENGTH);
+    if(inputMessage->getU32() != checksum) {
+        // error
+        logError("Checksum is invalid.");
+        return;
+    }
+
+    if(m_xteaEncryptionEnabled)
+        xteaDecrypt(inputMessage);
+}
+
 void Protocol::onError(const boost::system::error_code& error)
 {
-    flogError("PROTOCOL ERROR: ", error.message());
+    flogError("PROTOCOL ERROR: %s", error.message());
 
     // invalid hostname
     // connection timeouted
 
     // displays a dialog, finish protocol
 }
+
+bool Protocol::xteaDecrypt(InputMessage *inputMessage)
+{
+    // FIXME: this function has not been tested yet
+    uint16 messageSize = inputMessage->getMessageSize() - InputMessage::CHECKSUM_LENGTH;
+    if(messageSize % 8 != 0) {
+        //LOG_TRACE_DEBUG("not valid encrypted message size")
+        return false;
+    }
+
+    uint32 *buffer = (uint32*)(inputMessage->getBuffer() + InputMessage::DATA_POS);
+    int readPos = 0;
+
+    while(readPos < messageSize/4) {
+        uint32 v0 = buffer[readPos], v1 = buffer[readPos + 1];
+        uint32 delta = 0x61C88647;
+        uint32 sum = 0xC6EF3720;
+
+        for(int32 i = 0; i < 32; i++) {
+            v1 -= ((v0 << 4 ^ v0 >> 5) + v0) ^ (sum + m_xteaKey[sum>>11 & 3]);
+            sum += delta;
+            v0 -= ((v1 << 4 ^ v1 >> 5) + v1) ^ (sum + m_xteaKey[sum & 3]);
+        }
+        buffer[readPos] = v0; buffer[readPos + 1] = v1;
+        readPos = readPos + 2;
+    }
+
+    int tmp = inputMessage->getU16();
+    if(tmp > inputMessage->getMessageSize() - 4) {
+        //LOG_TRACE_DEBUG("not valid unencrypted message size")
+        return false;
+    }
+
+    inputMessage->setMessageSize(tmp + InputMessage::UNENCRYPTED_DATA_POS);
+    return true;
+}
+
+void Protocol::xteaEncrypt(OutputMessage *outputMessage)
+{
+    uint16 messageLength = outputMessage->getMessageSize();
+
+    //add bytes until reach 8 multiple
+    if((messageLength % 8) != 0) {
+        uint16 n = 8 - (messageLength % 8);
+        outputMessage->addPaddingBytes(n);
+        messageLength += n;
+    }
+
+    int readPos = 0;
+    uint32 *buffer = (uint32*)outputMessage->getBuffer() + OutputMessage::DATA_POS;
+    while(readPos < messageLength / 4) {
+        uint32 v0 = buffer[readPos], v1 = buffer[readPos + 1];
+        uint32 delta = 0x61C88647;
+        uint32 sum = 0;
+
+        for(int32 i = 0; i < 32; i++) {
+            v0 += ((v1 << 4 ^ v1 >> 5) + v1) ^ (sum + m_xteaKey[sum & 3]);
+            sum -= delta;
+            v1 += ((v0 << 4 ^ v0 >> 5) + v0) ^ (sum + m_xteaKey[sum>>11 & 3]);
+        }
+        buffer[readPos] = v0; buffer[readPos + 1] = v1;
+        readPos = readPos + 2;
+    }
+}
+
+uint32 Protocol::getAdlerChecksum(uint8 *buffer, uint16 size)
+{
+    uint32 a = 1, b = 0;
+    while (size > 0) {
+        size_t tlen = size > 5552 ? 5552 : size;
+        size -= tlen;
+        do {
+            a += *buffer++;
+            b += a;
+        } while (--tlen);
+
+        a %= 65521;
+        b %= 65521;
+    }
+
+    return (b << 16) | a;
+}
+

src/framework/net/protocol.h

@@ -26,6 +26,16 @@
 #define PROTOCOL_H
 
 #include <net/connection.h>
+#include <net/inputmessage.h>
+#include <net/outputmessage.h>
+
+#define CIPSOFT_PUBLIC_RSA "1321277432058722840622950990822933849527763264961655079678763618" \
+                           "4334395343554449668205332383339435179772895415509701210392836078" \
+                           "6959821132214473291575712138800495033169914814069637740318278150" \
+                           "2907336840325241747827401343576296990629870233111328210165697754" \
+                           "88792221429527047321331896351555606801473202394175817"
+
+//#define RSA "109120132967399429278860960508995541528237502902798129123468757937266291492576446330739696001110603907230888610072655818825358503429057592827629436413108566029093628212635953836686562675849720620786279431090218017681061521755056710823876476444260558147179707119674283982419152118103759076030616683978566631413"
 
 class Protocol
 {
@@ -33,10 +43,20 @@ public:
     Protocol();
 
     void connect(const std::string& host, uint16 port, const SimpleCallback& callback);
+    void send(OutputMessage *outputMessage);
 
+    virtual void onRecv(InputMessage *inputMessage);
     virtual void onError(const boost::system::error_code& error);
 
+protected:
+    uint32 m_xteaKey[4];
+    bool m_xteaEncryptionEnabled;
+
 private:
+    bool xteaDecrypt(InputMessage *inputMessage);
+    void xteaEncrypt(OutputMessage *outputMessage);
+    uint32 getAdlerChecksum(uint8 *buffer, uint16 size);
+
     ConnectionPtr m_connection;
 };
 

src/main.cpp

@@ -32,6 +32,8 @@
 #include <script/luascript.h>
 #include <ui/uicontainer.h>
 
+#include "protocollogin.h"
+
 void signal_handler(int sig)
 {
     static bool stopping = false;
@@ -83,6 +85,9 @@ int main(int argc, const char *argv[])
         args.push_back(argv[i]);
 #endif
 
+    ProtocolLogin login;
+    login.login("tibialua0", "lua123456");
+
     logInfo("OTClient 0.2.0");
 
     // install exit signal handler

src/protocollogin.cpp

@@ -21,20 +21,24 @@
  * THE SOFTWARE.
  */
 
-
 #include "protocollogin.h"
+#include <net/outputmessage.h>
+#include <util/rsa.h>
 
 ProtocolLogin::ProtocolLogin()
 {
 
 }
 
-void ProtocolLogin::login(const std::string& accountName, const std::string& password)
+void ProtocolLogin::login(const std::string& accountName, const std::string& accountPassword)
 {
-    // return error if acc or password is empty or any other condition
+    if(accountName.empty() || accountPassword.empty()) {
+        // shows error dialog
+        return;
+    }
 
     m_accountName = accountName;
-    m_password = password;
+    m_accountPassword = accountPassword;
 
     static const char hosts[][32] = {
         "login01.tibia.com",
@@ -49,8 +53,9 @@ void ProtocolLogin::login(const std::string& accountName, const std::string& pas
         "tibia05.cipsoft.com"
     };
 
-    const std::string host = hosts[rand() % 10];
+    std::string host = hosts[rand() % 10];
-    const uint16 port = 7171;
+    //std::string host = "tecserver.zapto.org";
+    uint16 port = 7171;
 
     connect(host, port, boost::bind(&ProtocolLogin::onConnect, this));
 }
@@ -63,5 +68,89 @@ void ProtocolLogin::onConnect()
 
 void ProtocolLogin::sendPacket()
 {
+    OutputMessage oMsg;
 
+    oMsg.addU8(0x01); // Protocol id
+    oMsg.addU16(0x02);  // OS
+    oMsg.addU16(874); // Client version
+
+    oMsg.addU32(0x4DBAA20B); // Data Signature
+    oMsg.addU32(0x4DAD1A32); // Sprite Signature
+    oMsg.addU32(0x4DA2D2B5); // Picture Signature
+
+    oMsg.addU8(0); // First RSA byte must be 0x00 // 1
+
+    // Generete xtea key.
+    m_xteaKey[0] = 432324;
+    m_xteaKey[1] = 24324;
+    m_xteaKey[2] = 423432;
+    m_xteaKey[3] = 234324;
+
+    // Add xtea key
+    oMsg.addU32(m_xteaKey[0]); // 5
+    oMsg.addU32(m_xteaKey[1]); // 9
+    oMsg.addU32(m_xteaKey[2]); // 13
+    oMsg.addU32(m_xteaKey[3]); // 17
+
+    oMsg.addString(m_accountName); // Account Name // 19
+    oMsg.addString(m_accountPassword); // Password // 21
+
+    // Packet data must have since byte 0, start, 128 bytes
+    oMsg.addPaddingBytes(128 - (21 + m_accountName.length() + m_accountPassword.length()));
+
+    // Encrypt msg with RSA
+    if(!Rsa::encrypt((char*)oMsg.getBuffer() + 6 + oMsg.getMessageSize() - 128, 128, CIPSOFT_PUBLIC_RSA))
+        return;
+
+    send(&oMsg);
+
+    m_xteaEncryptionEnabled = true;
+}
+
+void ProtocolLogin::onRecv(InputMessage *inputMessage)
+{
+    Protocol::onRecv(inputMessage);
+
+    while(!inputMessage->end()) {
+        uint8 opt = inputMessage->getU8();
+        flogError("%d", (int)opt);
+        switch(opt) {
+        case 0x0A:
+            parseError(inputMessage);
+            break;
+        case 0x14:
+            parseMOTD(inputMessage);
+            break;
+        case 0x64:
+            parseCharacterList(inputMessage);
+            break;
+        }
+    }
+}
+
+void ProtocolLogin::parseError(InputMessage *inputMessage)
+{
+    std::string error = inputMessage->getString();
+    logError(error.c_str());
+}
+
+void ProtocolLogin::parseMOTD(InputMessage *inputMessage)
+{
+    std::string motd = inputMessage->getString();
+    logError(motd.c_str());
+}
+
+void ProtocolLogin::parseCharacterList(InputMessage *inputMessage)
+{
+    uint8 characters = inputMessage->getU8();
+    for(int i = 0; i < characters; ++i) {
+        std::string name = inputMessage->getString();
+        std::string world = inputMessage->getString();
+        uint32 ip = inputMessage->getU32();
+        uint16 port = inputMessage->getU16();
+
+        flogError("%s %s %d %d", name.c_str() % world.c_str() % ip % port);
+    }
+    uint16 premiumDays = inputMessage->getU16();
+    flogError("%d", premiumDays);
 }

src/protocollogin.h

@@ -32,14 +32,19 @@ class ProtocolLogin : public Protocol
 public:
     ProtocolLogin();
 
-    void login(const std::string& accountName, const std::string& password);
+    void login(const std::string& accountName, const std::string& accountPassword);
 
     void onConnect();
 
     void sendPacket();
+    void onRecv(InputMessage *inputMessage);
 
 private:
-    std::string m_accountName, m_password;
+    void parseError(InputMessage *inputMessage);
+    void parseMOTD(InputMessage *inputMessage);
+    void parseCharacterList(InputMessage *inputMessage);
+
+    std::string m_accountName, m_accountPassword;
 
 };