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Diffstat (limited to 'core/src/main/java/org/spongycastle/pqc/crypto/mceliece/McElieceCCA2PrivateKeyParameters.java')
-rw-r--r-- | core/src/main/java/org/spongycastle/pqc/crypto/mceliece/McElieceCCA2PrivateKeyParameters.java | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/pqc/crypto/mceliece/McElieceCCA2PrivateKeyParameters.java b/core/src/main/java/org/spongycastle/pqc/crypto/mceliece/McElieceCCA2PrivateKeyParameters.java new file mode 100644 index 00000000..a19a267b --- /dev/null +++ b/core/src/main/java/org/spongycastle/pqc/crypto/mceliece/McElieceCCA2PrivateKeyParameters.java @@ -0,0 +1,172 @@ +package org.spongycastle.pqc.crypto.mceliece; + + +import org.spongycastle.pqc.math.linearalgebra.GF2Matrix; +import org.spongycastle.pqc.math.linearalgebra.GF2mField; +import org.spongycastle.pqc.math.linearalgebra.Permutation; +import org.spongycastle.pqc.math.linearalgebra.PolynomialGF2mSmallM; + +/** + * + * + * + */ +public class McElieceCCA2PrivateKeyParameters + extends McElieceCCA2KeyParameters +{ + + // the OID of the algorithm + private String oid; + + // 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 <tt>GF(2<sup>m</sup>)</tt> + * @param gp the irreducible Goppa polynomial + * @param p the permutation + * @param h the canonical check matrix + * @param qInv the matrix used to compute square roots in + * <tt>(GF(2^m))^t</tt> + * @param params McElieceCCA2Parameters + */ + public McElieceCCA2PrivateKeyParameters(String oid, int n, int k, GF2mField field, + PolynomialGF2mSmallM gp, Permutation p, GF2Matrix h, + PolynomialGF2mSmallM[] qInv, McElieceCCA2Parameters params) + { + super(true, params); + this.oid = oid; + this.n = n; + this.k = k; + this.field = field; + this.goppaPoly = gp; + this.p = p; + this.h = h; + this.qInv = qInv; + } + + /** + * Constructor used by the {@link McElieceKeyFactory}. + * + * @param n the length of the code + * @param k the dimension of the code + * @param encFieldPoly the encoded field polynomial defining the finite field + * <tt>GF(2<sup>m</sup>)</tt> + * @param encGoppaPoly the encoded irreducible Goppa polynomial + * @param encP the encoded permutation + * @param encH the encoded canonical check matrix + * @param encQInv the encoded matrix used to compute square roots in + * <tt>(GF(2^m))^t</tt> + * @param params McElieceCCA2Parameters + */ + public McElieceCCA2PrivateKeyParameters(String oid, int n, int k, byte[] encFieldPoly, + byte[] encGoppaPoly, byte[] encP, byte[] encH, byte[][] encQInv, McElieceCCA2Parameters params) + { + super(true, params); + this.oid = oid; + this.n = n; + this.k = k; + field = new GF2mField(encFieldPoly); + goppaPoly = new PolynomialGF2mSmallM(field, encGoppaPoly); + p = new Permutation(encP); + h = new GF2Matrix(encH); + qInv = new PolynomialGF2mSmallM[encQInv.length]; + for (int i = 0; i < encQInv.length; i++) + { + qInv[i] = new PolynomialGF2mSmallM(field, encQInv[i]); + } + } + + /** + * @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 <tt>(GF(2^m))^t</tt> + */ + public PolynomialGF2mSmallM[] getQInv() + { + return qInv; + } + + public String getOIDString() + { + return oid; + + } + +} |