Initial MSVC 2008 projects workspace

l2packets/login/L2LoginPacket.h

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+#ifndef H_L2LOGINPACKET
+#define H_L2LOGINPACKET
+
+#include "../base/L2BasePacket.h"
+
+/** \class L2LoginPacket
+ * A base class for all login server communication packets.
+ * Includes functions to handle Blowfish encryption/decryption and checksum calculations. */
+
+class L2LoginPacket: public L2BasePacket
+{
+public:
+	/** Default constructor */
+	L2LoginPacket();
+	/** Constructs object and calls setBytes() with parameters bytes, length
+	 * \param bytes data to set
+	 * \param length data size */
+	L2LoginPacket( const unsigned char *bytes, unsigned int length );
+	virtual ~L2LoginPacket();
+public:
+	/** Does Blowfish decryption of packet data.
+	 * \param bUseStaticBFKey set to true to use static BF key, or false to dynamic.
+	          Dynamic BF key must be set before by setDynamicBFKey()
+	 * \return success status */
+	virtual bool         decodeBlowfish( bool bUseStaticBFKey );
+
+	/** Does Blowfish decryption of packet data.
+	 * \param blowfishKey - 16 bytes array, blowfish key to use to decrypt packet data
+	 * \return success status */
+	virtual bool         decodeBlowfish( unsigned char *blowfishKey );
+public:
+	/** Appends checksum to packet
+	 * \param append4bytes in Hellbound, set to true to keep packet data length 8-byte aligned */
+	virtual bool         appendChecksum( bool append4bytes = true );
+	/** Verifies data checksum, XORing count bytes starting from offset.\n
+	 * Checksum must be written at last 4 bytes of data, so data size must be >= 8 at least.
+	 * \param bytes data array
+	 * \param offset starting position
+	 * \param size data size in bytes (should be a multiple of 4)
+	 * \return true, if checksum is ok */
+	static bool          verifyBytesChecksum( const unsigned char *bytes, unsigned int offset, unsigned int size );
+	/** Verifies this packet checksum. */
+	virtual bool         verifyChecksum() const;
+	/** Does padding of packet data by zeroes to 8-byte border (before BF encryption) */
+	virtual bool         padPacketTo8ByteLen();
+	/** In Hellbound, packets are padded by more 8 zero bytes after adding checksum & 4 bytes */
+	virtual bool         appendMore8Bytes();
+	/** Sets dynamic Blowfish key (which is taken from Init packet)
+	 * \param newKey must point at 16 bytes buffer
+	 * \param newKeyLen currently must be = 16 */
+	virtual bool         setDynamicBFKey( unsigned char *newKey, unsigned int newKeyLen );
+	/** Does Blowfish encryption.
+	 * \param bUseStaticBFKey set to true to use static BF key, or false to dynamic.
+	          Dynamic BF key must be set before by setDynamicBFKey()
+	 * \return success status */
+	virtual bool         encodeBlowfish( bool bUseStaticBFKey );
+
+public:
+	/** Encrypts packet with Blowfish, does all padding, appends checksum - after that packet may be sent
+	 * \param blowfishKey - Blowfish key to use for encryption (16 bytes)
+	 * \param bfKeyLen - length of Blowfish key (default is 16)
+	 * \return success status */
+	virtual bool encodeAndPrepareToSend( unsigned char *blowfishKey, unsigned int bfKeyLen = 16 );
+
+protected:
+	/** Also initializes STATIC_BF_KEY, which is constant. */
+	virtual void _initNull();
+protected:
+	unsigned char STATIC_BLOWFISH_KEY[32]; ///< Static Blowfish key (First packet from login server is encrypted by this)
+	unsigned int  STATIC_BLOWFISH_KEY_LEN; ///< length of static BF key
+	unsigned char NEW_BLOWFISH_KEY[64]; ///< Buffer to hold dynamic blowfish key
+	unsigned int  NEW_BLOWFISH_KEY_LEN; ///< Dynamic BF key size
+	unsigned int  xor_key; ///< current XOR key (for Init packet)
+};
+
+#endif /* H_L2LOGINPACKET */