systems.crigges.jmpq3

Class MpqCrypto

java.lang.Object

systems.crigges.jmpq3.MpqCrypto

public class MpqCrypto
extends java.lang.Object

The Class MpqCrypto.

Field Summary

Fields

Modifier and Type	Field and Description
static int	MPQ_HASH_FILE_KEY The Constant MPQ_HASH_FILE_KEY.
static int	MPQ_HASH_KEY2_MIX The Constant MPQ_HASH_KEY2_MIX.
static int	MPQ_HASH_NAME_A The Constant MPQ_HASH_NAME_A.
static int	MPQ_HASH_NAME_B The Constant MPQ_HASH_NAME_B.
static int	MPQ_HASH_TABLE_INDEX The Constant MPQ_HASH_TABLE_INDEX.
static int	MPQ_KEY_BLOCK_TABLE The Constant MPQ_KEY_BLOCK_TABLE.
static int	MPQ_KEY_HASH_TABLE The Constant MPQ_KEY_HASH_TABLE.

Constructor Summary

Constructors

Constructor and Description
MpqCrypto() Instantiates a new mpq crypto.

Method Summary

Modifier and Type	Method and Description
byte[]	decryptBlock(byte[] block, int key) Decrypt block.
byte[]	decryptBlock(java.nio.ByteBuffer buf, int length, int key) Decrypt block.
byte[]	encryptMpqBlock(byte[] bytes, int length, int key) Encrypt mpq block.
byte[]	encryptMpqBlock(java.nio.ByteBuffer buf, int length, int dwKey1) Encrypt mpq block.
int	hash(java.lang.String fileName, int hashType) This is a port of unsigned long HashString(char *lpszFileName, unsigned long dwHashType) which is described in http://www.zezula.net/en/mpq/techinfo.html#hashes The implementation there uses 'long' which is a 32 bit int on Windows, so here we have to use int...
static void	main(java.lang.String[] args) The main method.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MPQ_HASH_TABLE_INDEX

public static final int MPQ_HASH_TABLE_INDEX

The Constant MPQ_HASH_TABLE_INDEX.

See Also:

Constant Field Values

MPQ_HASH_NAME_A

public static final int MPQ_HASH_NAME_A

The Constant MPQ_HASH_NAME_A.

See Also:

Constant Field Values

MPQ_HASH_NAME_B

public static final int MPQ_HASH_NAME_B

The Constant MPQ_HASH_NAME_B.

See Also:

Constant Field Values

MPQ_HASH_FILE_KEY

public static final int MPQ_HASH_FILE_KEY

The Constant MPQ_HASH_FILE_KEY.

See Also:

Constant Field Values

MPQ_HASH_KEY2_MIX

public static final int MPQ_HASH_KEY2_MIX

The Constant MPQ_HASH_KEY2_MIX.

See Also:

Constant Field Values

MPQ_KEY_HASH_TABLE

public static final int MPQ_KEY_HASH_TABLE

The Constant MPQ_KEY_HASH_TABLE.

See Also:

Constant Field Values

MPQ_KEY_BLOCK_TABLE

public static final int MPQ_KEY_BLOCK_TABLE

The Constant MPQ_KEY_BLOCK_TABLE.

See Also:

Constant Field Values

Constructor Detail

MpqCrypto

public MpqCrypto()

Instantiates a new mpq crypto.

Method Detail

hash

public int hash(java.lang.String fileName,
                int hashType)

This is a port of unsigned long HashString(char *lpszFileName, unsigned long dwHashType) which is described in http://www.zezula.net/en/mpq/techinfo.html#hashes The implementation there uses 'long' which is a 32 bit int on Windows, so here we have to use int...

Parameters:

fileName - the file name

hashType - the hash type

Returns:

the int

decryptBlock

public byte[] decryptBlock(byte[] block,
                           int key)

Decrypt block.

Parameters:

block - the block

key - the key

Returns:

the byte[]

decryptBlock

public byte[] decryptBlock(java.nio.ByteBuffer buf,
                           int length,
                           int key)

Decrypt block.

Parameters:

buf - the buf

length - the length

key - the key

Returns:

the byte[]

encryptMpqBlock

public byte[] encryptMpqBlock(java.nio.ByteBuffer buf,
                              int length,
                              int dwKey1)

Encrypt mpq block.

Parameters:

buf - the buf

length - the length

dwKey1 - the dw key1

Returns:

the byte[]

main

public static void main(java.lang.String[] args)

The main method.

Parameters:

args - the arguments

encryptMpqBlock

public byte[] encryptMpqBlock(byte[] bytes,
                              int length,
                              int key)

Encrypt mpq block.

Parameters:

bytes - the bytes

length - the length

key - the key

Returns:

the byte[]