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Diffstat (limited to 'bcprov/src/main/java/org/bouncycastle/pqc/jcajce/spec/McElieceCCA2PrivateKeySpec.java')
-rw-r--r-- | bcprov/src/main/java/org/bouncycastle/pqc/jcajce/spec/McElieceCCA2PrivateKeySpec.java | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/pqc/jcajce/spec/McElieceCCA2PrivateKeySpec.java b/bcprov/src/main/java/org/bouncycastle/pqc/jcajce/spec/McElieceCCA2PrivateKeySpec.java new file mode 100644 index 0000000..efb27b5 --- /dev/null +++ b/bcprov/src/main/java/org/bouncycastle/pqc/jcajce/spec/McElieceCCA2PrivateKeySpec.java @@ -0,0 +1,161 @@ +package org.bouncycastle.pqc.jcajce.spec; + +import java.security.spec.KeySpec; + +import org.bouncycastle.pqc.math.linearalgebra.GF2Matrix; +import org.bouncycastle.pqc.math.linearalgebra.GF2mField; +import org.bouncycastle.pqc.math.linearalgebra.Permutation; +import org.bouncycastle.pqc.math.linearalgebra.PolynomialGF2mSmallM; + +/** + * This class provides a specification for a McEliece CCA2 private key. + * + * @see JDKMcElieceCCA2PrivateKey + */ +public class McElieceCCA2PrivateKeySpec + implements KeySpec +{ + + // 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> + */ + public McElieceCCA2PrivateKeySpec(String oid, int n, int k, GF2mField field, + PolynomialGF2mSmallM gp, Permutation p, GF2Matrix h, + PolynomialGF2mSmallM[] qInv) + { + 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> + */ + public McElieceCCA2PrivateKeySpec(String oid, int n, int k, byte[] encFieldPoly, + byte[] encGoppaPoly, byte[] encP, byte[] encH, byte[][] encQInv) + { + 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 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; + + } + +} |