C# Class DS4Windows.Crc32Algorithm

Implements a 32-bit CRC hash algorithm compatible with Zip etc.

Crc32 should only be used for backward compatibility with older file formats and algorithms. It is not secure enough for new applications. If you need to call multiple times for the same data either use the HashAlgorithm interface or remember that the result of one Compute call needs to be ~ (XOR) before being passed in as the seed for the next Compute call.

Inheritance: HashAlgorithm

显示文件 Open project: Yohoki/DS4WindowsEx Class Usage Examples

Public Methods

Method	Description
CalculateBasicHash ( uint &seed, Array &buffer, int offset, int size ) : uint
CalculateFasterBT78Hash ( uint &seed, Array &buffer, int &start, int &size ) : uint	More optimized CRC-32 algorithm that only works with 78 byte arrays
Compute ( Array buffer ) : uint
Compute ( uint seed, Array buffer ) : uint
Compute ( uint polynomial, uint seed, Array buffer ) : uint
Crc32Algorithm ( ) : System
Crc32Algorithm ( uint polynomial, uint seed ) : System
Initialize ( ) : void
InitializeTable ( uint polynomial ) : uint[]

Protected Methods

Method	Description
HashCore ( Array buffer, int start, int length ) : void
HashFinal ( ) : byte[]

Private Methods

Method	Description
CalculateHash ( Array table, uint seed, Array buffer, int start, int size ) : uint
UintToBigEndianBytes ( uint uint32 ) : byte[]

Method Details

CalculateBasicHash() public static method

public static CalculateBasicHash ( uint &seed, Array &buffer, int offset, int size ) : uint
seed	uint
buffer	Array
offset	int
size	int
return	uint

CalculateFasterBT78Hash() public static method

More optimized CRC-32 algorithm that only works with 78 byte arrays

public static CalculateFasterBT78Hash ( uint &seed, Array &buffer, int &start, int &size ) : uint
seed	uint
buffer	Array
start	int
size	int
return	uint

Compute() public static method

public static Compute ( Array buffer ) : uint
buffer	Array
return	uint

Compute() public static method

public static Compute ( uint seed, Array buffer ) : uint
seed	uint
buffer	Array
return	uint

Compute() public static method

public static Compute ( uint polynomial, uint seed, Array buffer ) : uint
polynomial	uint
seed	uint
buffer	Array
return	uint

Crc32Algorithm() public method

public Crc32Algorithm ( ) : System
return	System

Crc32Algorithm() public method

public Crc32Algorithm ( uint polynomial, uint seed ) : System
polynomial	uint
seed	uint
return	System

HashCore() protected method

protected HashCore ( Array buffer, int start, int length ) : void
buffer	Array
start	int
length	int
return	void

HashFinal() protected method

protected HashFinal ( ) : byte[]
return	byte[]

Initialize() public method

public Initialize ( ) : void
return	void

InitializeTable() public static method

public static InitializeTable ( uint polynomial ) : uint[]
polynomial	uint
return	uint[]