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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8 with debug enabled.
package org.bouncycastle.pqc.crypto.mceliece;
import org.bouncycastle.pqc.math.linearalgebra.GF2Matrix;
import org.bouncycastle.pqc.math.linearalgebra.GF2mField;
import org.bouncycastle.pqc.math.linearalgebra.GoppaCode;
import org.bouncycastle.pqc.math.linearalgebra.Permutation;
import org.bouncycastle.pqc.math.linearalgebra.PolynomialGF2mSmallM;
import org.bouncycastle.pqc.math.linearalgebra.PolynomialRingGF2m;
/**
*
*
*
*/
public class McElieceCCA2PrivateKeyParameters
extends McElieceCCA2KeyParameters
{
// the length of the code
private int n;
// the dimension of the code
private int k;
// the finte field GF(2^m)
private GF2mField field;
// the irreducible Goppa polynomial
private PolynomialGF2mSmallM goppaPoly;
// the permutation
private Permutation p;
// the canonical check matrix
private GF2Matrix h;
// the matrix used to compute square roots in (GF(2^m))^t
private PolynomialGF2mSmallM[] qInv;
/**
* Constructor.
*
* @param n the length of the code
* @param k the dimension of the code
* @param field the finite field GF(2m)
* @param gp the irreducible Goppa polynomial
* @param p the permutation
* @param digest name of digest algorithm
*/
public McElieceCCA2PrivateKeyParameters(int n, int k, GF2mField field,
PolynomialGF2mSmallM gp, Permutation p, String digest)
{
this(n, k, field, gp, GoppaCode.createCanonicalCheckMatrix(field, gp), p, digest);
}
/**
* Constructor.
*
* @param n the length of the code
* @param k the dimension of the code
* @param field the finite field GF(2m)
* @param gp the irreducible Goppa polynomial
* @param canonicalCheckMatrix the canonical check matrix
* @param p the permutation
* @param digest name of digest algorithm
*/
public McElieceCCA2PrivateKeyParameters(int n, int k, GF2mField field, PolynomialGF2mSmallM gp,
GF2Matrix canonicalCheckMatrix, Permutation p, String digest)
{
super(true, digest);
this.n = n;
this.k = k;
this.field = field;
this.goppaPoly = gp;
this.h = canonicalCheckMatrix;
this.p = p;
PolynomialRingGF2m ring = new PolynomialRingGF2m(field, gp);
// matrix for computing square roots in (GF(2^m))^t
this.qInv = ring.getSquareRootMatrix();
}
/**
* @return the length of the code
*/
public int getN()
{
return n;
}
/**
* @return the dimension of the code
*/
public int getK()
{
return k;
}
/**
* @return the degree of the Goppa polynomial (error correcting capability)
*/
public int getT()
{
return goppaPoly.getDegree();
}
/**
* @return the finite field
*/
public GF2mField getField()
{
return field;
}
/**
* @return the irreducible Goppa polynomial
*/
public PolynomialGF2mSmallM getGoppaPoly()
{
return goppaPoly;
}
/**
* @return the permutation P
*/
public Permutation getP()
{
return p;
}
/**
* @return the canonical check matrix H
*/
public GF2Matrix getH()
{
return h;
}
/**
* @return the matrix used to compute square roots in (GF(2^m))^t
*/
public PolynomialGF2mSmallM[] getQInv()
{
return qInv;
}
}
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