C# Class Warcraft.MPQ.Crypto.MPQCrypt

ファイルを表示 Open project: Nihlus/libwarcraft

Public Methods

Method	Description
DecryptData ( byte data, uint key ) : byte[]	Decrypts the given input data. Bytes outside of an even 4-byte boundary are not decrypted, and are considered not encrypted.
DecryptSectorOffsetTable ( BinaryReader br, List &sectorOffsets, uint blockSize, uint key ) : void	Decrypts the sector offset table using rolling decryption - it starts where the input BinaryReader is, reads and decrypts offsets until the decrypted offset equals the input block size.
EncryptData ( byte data, uint key ) : byte[]	Encrypts the given input data. Bytes outside of an even 4-byte boundary are not encrypted, and are simply appended at the end of the data block.
GetFileKey ( string fileName, bool isAdjusted = false, uint blockOffset, uint fileSize ) : uint	Calculates the decryption key for a file sector.
Hash ( string inputString, HashType hashType ) : uint	Hashes an input string, given a hash type. This function is case-insensitive, and treats all input as being in ALL UPPER CASE.
VerifySectorChecksum ( byte sector, uint checksum ) : bool	Verifies the integrity of a file sector using an adler32 checksum.

Private Methods

Method	Description
InitializeEncryptionTable ( ) : void	Initializes the encryption table.
InternalEncryptDecrypt ( byte data, uint key ) : byte[]	Internal XOR function that encrypts and decrypts a block of data.
MPQCrypt ( ) : System

Method Details

DecryptData() public static method

Decrypts the given input data. Bytes outside of an even 4-byte boundary are not decrypted, and are considered not encrypted.

public static DecryptData ( byte data, uint key ) : byte[]
data	byte	Data to be decrypted.
key	uint	The decryption key to use.
return	byte[]

DecryptSectorOffsetTable() public static method

Decrypts the sector offset table using rolling decryption - it starts where the input BinaryReader is, reads and decrypts offsets until the decrypted offset equals the input block size.

public static DecryptSectorOffsetTable ( BinaryReader br, List &sectorOffsets, uint blockSize, uint key ) : void
br	System.IO.BinaryReader	The archive's BinaryReader
sectorOffsets	List	The output sector offsets.
blockSize	uint	The size of the block to be decrypted.
key	uint	The decryption key for the offset table.
return	void

EncryptData() public static method

Encrypts the given input data. Bytes outside of an even 4-byte boundary are not encrypted, and are simply appended at the end of the data block.

public static EncryptData ( byte data, uint key ) : byte[]
data	byte	Data to be encrypted.
key	uint	The encryption key to use.
return	byte[]

GetFileKey() public static method

Calculates the decryption key for a file sector.

public static GetFileKey ( string fileName, bool isAdjusted = false, uint blockOffset, uint fileSize ) : uint
fileName	string	The name of the file the sector belongs to
isAdjusted	bool	If set to true, the key is adjusted by the given block offset and file size.
blockOffset	uint	The block offset of the file.
fileSize	uint	The size of the file.
return	uint

Hash() public static method

Hashes an input string, given a hash type. This function is case-insensitive, and treats all input as being in ALL UPPER CASE.

public static Hash ( string inputString, HashType hashType ) : uint
inputString	string	Input string.
hashType	HashType	Hash type.
return	uint

VerifySectorChecksum() public static method

Verifies the integrity of a file sector using an adler32 checksum.

public static VerifySectorChecksum ( byte sector, uint checksum ) : bool
sector	byte	Sector data.
checksum	uint	Sector checksum.
return	bool