C# Class LSLib.Granny.Crc32

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: System.Security.Cryptography.HashAlgorithm

Mostra file Open project: Norbyte/lslib

Public Methods

Method	Description
Compute ( UInt32 polynomial, UInt32 seed, byte buffer ) : UInt32
Compute ( UInt32 seed, byte buffer ) : UInt32
Compute ( byte buffer ) : UInt32
Crc32 ( ) : System
Crc32 ( UInt32 polynomial, UInt32 seed ) : System
Initialize ( ) : void

Protected Methods

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

Private Methods

Method	Description
CalculateHash ( UInt32 table, UInt32 seed, IList buffer, int start, int size ) : UInt32
InitializeTable ( UInt32 polynomial ) : System.UInt32[]
UInt32ToBigEndianBytes ( UInt32 uint32 ) : byte[]

Method Details

Compute() public static method

public static Compute ( UInt32 polynomial, UInt32 seed, byte buffer ) : UInt32
polynomial	System.UInt32
seed	System.UInt32
buffer	byte
return	System.UInt32

Compute() public static method

public static Compute ( UInt32 seed, byte buffer ) : UInt32
seed	System.UInt32
buffer	byte
return	System.UInt32

Compute() public static method

public static Compute ( byte buffer ) : UInt32
buffer	byte
return	System.UInt32

Crc32() public method

public Crc32 ( ) : System
return	System

Crc32() public method

public Crc32 ( UInt32 polynomial, UInt32 seed ) : System
polynomial	System.UInt32
seed	System.UInt32
return	System

HashCore() protected method

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

HashFinal() protected method

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

Initialize() public method

public Initialize ( ) : void
return	void