C# Class Org.BouncyCastle.Crypto.Macs.SipHash

Implementation of SipHash as specified in "SipHash: a fast short-input PRF", by Jean-Philippe Aumasson and Daniel J. Bernstein (https://131002.net/siphash/siphash.pdf).

"SipHash is a family of PRFs SipHash-c-d where the integer parameters c and d are the number of compression rounds and the number of finalization rounds. A compression round is identical to a finalization round and this round function is called SipRound. Given a 128-bit key k and a (possibly empty) byte string m, SipHash-c-d returns a 64-bit value..."

Inheritance: IMac

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Protected Properties

Property	Type	Description
buf	byte[]
bufPos	int
c	int
k0	long
v0	long
wordCount	int

Public Methods

Method	Description
BlockUpdate ( byte input, int offset, int length ) : void
DoFinal ( byte output, int outOff ) : int
DoFinal ( ) : long
GetMacSize ( ) : int
Init ( ICipherParameters parameters ) : void
Reset ( ) : void
SipHash ( ) : System	SipHash-2-4
SipHash ( int c, int d ) : System	SipHash-c-d
Update ( byte input ) : void

Protected Methods

Method	Description
ApplySipRounds ( int n ) : void
ProcessMessageWord ( ) : void
RotateLeft ( long x, int n ) : long

Method Details

ApplySipRounds() protected method

protected ApplySipRounds ( int n ) : void
n	int
return	void

BlockUpdate() public method

public BlockUpdate ( byte input, int offset, int length ) : void
input	byte
offset	int
length	int
return	void

DoFinal() public method

public DoFinal ( byte output, int outOff ) : int
output	byte
outOff	int
return	int

DoFinal() public method

public DoFinal ( ) : long
return	long

GetMacSize() public method

public GetMacSize ( ) : int
return	int

Init() public method

public Init ( ICipherParameters parameters ) : void
parameters	ICipherParameters
return	void

ProcessMessageWord() protected method

protected ProcessMessageWord ( ) : void
return	void

Reset() public method

public Reset ( ) : void
return	void

RotateLeft() protected static method

protected static RotateLeft ( long x, int n ) : long
x	long
n	int
return	long

SipHash() public method

SipHash-2-4

public SipHash ( ) : System
return	System

SipHash() public method

SipHash-c-d

public SipHash ( int c, int d ) : System
c	int	the number of compression rounds
d	int	the number of finalization rounds
return	System

Update() public method

public Update ( byte input ) : void
input	byte
return	void

Property Details

buf protected_oe property

protected byte[] buf
return	byte[]

bufPos protected_oe property

protected int bufPos
return	int

c protected_oe property

protected int c
return	int

k0 protected_oe property

protected long k0
return	long

v0 protected_oe property

protected long v0
return	long

wordCount protected_oe property

protected int wordCount
return	int