C# Class Hugula.Update.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

ファイルを表示 Open project: tenvick/hugula

Public Methods

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

Protected Methods

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

Private Methods

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

Method Details

Compute() public static method

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

Compute() public static method

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

Compute() public static method

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

Crc32() public method

public Crc32 ( ) : System
return	System

Crc32() public method

public Crc32 ( uint polynomial, uint seed ) : System
polynomial	uint
seed	uint
return	System

GetHashResult() public method

public GetHashResult ( ) : uint
return	uint

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