org.bouncycastle.crypto.generators
Class GOST3410ParametersGenerator

java.lang.Object
  org.bouncycastle.crypto.generators.GOST3410ParametersGenerator

public class GOST3410ParametersGenerator
extends java.lang.Object

generate suitable parameters for GOST3410.

Field Summary

private java.security.SecureRandom	init_random
private static java.math.BigInteger	ONE
private int	size
private static java.math.BigInteger	TWO
private int	typeproc

Constructor Summary

GOST3410ParametersGenerator()

Method Summary

GOST3410Parameters	generateParameters() which generates the p , q and a values from the given parameters, returning the GOST3410Parameters object.
void	init(int size, int typeproc, java.security.SecureRandom random) initialise the key generator.
private int	procedure_A(int x0, int c, java.math.BigInteger[] pq, int size)
private long	procedure_Aa(long x0, long c, java.math.BigInteger[] pq, int size)
private void	procedure_B(int x0, int c, java.math.BigInteger[] pq)
private void	procedure_Bb(long x0, long c, java.math.BigInteger[] pq)
private java.math.BigInteger	procedure_C(java.math.BigInteger p, java.math.BigInteger q) Procedure C procedure generates the a value from the given p,q, returning the a value.

Methods inherited from class java.lang.Object

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

Field Detail

size

private int size

typeproc

private int typeproc

init_random

private java.security.SecureRandom init_random

ONE

private static final java.math.BigInteger ONE

TWO

private static final java.math.BigInteger TWO

Constructor Detail

GOST3410ParametersGenerator

public GOST3410ParametersGenerator()

Method Detail

init

public void init(int size,
                 int typeproc,
                 java.security.SecureRandom random)

initialise the key generator.

Parameters:

size - size of the key

typeproc - type procedure A,B = 1; A',B' - else

random - random byte source.

procedure_A

private int procedure_A(int x0,
                        int c,
                        java.math.BigInteger[] pq,
                        int size)

procedure_Aa

private long procedure_Aa(long x0,
                          long c,
                          java.math.BigInteger[] pq,
                          int size)

procedure_B

private void procedure_B(int x0,
                         int c,
                         java.math.BigInteger[] pq)

procedure_Bb

private void procedure_Bb(long x0,
                          long c,
                          java.math.BigInteger[] pq)

procedure_C

private java.math.BigInteger procedure_C(java.math.BigInteger p,
                                         java.math.BigInteger q)

Procedure C procedure generates the a value from the given p,q, returning the a value.

generateParameters

public GOST3410Parameters generateParameters()

which generates the p , q and a values from the given parameters, returning the GOST3410Parameters object.