lava.security.des.spec
Class DesSBoxes

java.lang.Object
  |
  +--lava.security.des.spec.DesSBoxes

public final class DesSBoxes

extends java.lang.Object

DES S boxes.

Details: This class contains the FIPS values for DES's S boxes, defined in FIPS PUB 46-2 as the primitive functions S₀, S₁, S₂, ..., S₈.

Since:

1999.08.04

Author:

Sharky

Field Summary

static int	COL_COUNT Columns per S box row.
static int	ROW_COUNT Rows per S box.
static int	SBOX_COUNT Number of S boxes.

Method Summary

static int

getFipsValue(int s, int row, int col) Returns FIPS S box value.

Methods inherited from class java.lang.Object

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

Field Detail

SBOX_COUNT

public static final int SBOX_COUNT

Number of S boxes.

Details: This is the number of S boxes defined in the specification and represented in this class: 8.

ROW_COUNT

public static final int ROW_COUNT

Rows per S box.

Details: This is the number of rows per S box: 4.

COL_COUNT

public static final int COL_COUNT

Columns per S box row.

Details: This is the number of columns per S box row: 16.

Method Detail

getFipsValue

public static final int getFipsValue(int s,
                                     int row,
                                     int col)

Returns FIPS S box value.

Details: This method returns the FIPS value from the given column of the given row of the given S box. This method uses the indexing convention as the spec.

Parameters:

s - the S box index (1-8)

row - the row index (0-3)

the - column index (0-15)