/** * @return the dimension of the code */ public int getK() { return params.getK(); }
private void initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey) { this.messDigest = Utils.getDigest(privKey.getDigest()); n = privKey.getN(); k = privKey.getK(); t = privKey.getT(); }
public void initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey) { this.messDigest = privKey.getParameters().getDigest(); n = privKey.getN(); k = privKey.getK(); t = privKey.getT(); }
private void initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey) { this.messDigest = Utils.getDigest(privKey.getDigest()); n = privKey.getN(); k = privKey.getK(); t = privKey.getT(); }
public void initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey) { this.messDigest = privKey.getParameters().getDigest(); n = privKey.getN(); k = privKey.getK(); t = privKey.getT(); }
/** * @return the hash code of this key */ public int hashCode() { int code = params.getK(); code = code * 37 + params.getN(); code = code * 37 + params.getField().hashCode(); code = code * 37 + params.getGoppaPoly().hashCode(); code = code * 37 + params.getP().hashCode(); return code * 37 + params.getH().hashCode(); }
public static GF2Vector[] decryptionPrimitive( McElieceCCA2PrivateKeyParameters privKey, GF2Vector c) { // obtain values from private key int k = privKey.getK(); Permutation p = privKey.getP(); GF2mField field = privKey.getField(); PolynomialGF2mSmallM gp = privKey.getGoppaPoly(); GF2Matrix h = privKey.getH(); PolynomialGF2mSmallM[] q = privKey.getQInv(); // compute inverse permutation P^-1 Permutation pInv = p.computeInverse(); // multiply c with permutation P^-1 GF2Vector cPInv = (GF2Vector)c.multiply(pInv); // compute syndrome of cP^-1 GF2Vector syndVec = (GF2Vector)h.rightMultiply(cPInv); // decode syndrome GF2Vector errors = GoppaCode.syndromeDecode(syndVec, field, gp, q); GF2Vector mG = (GF2Vector)cPInv.add(errors); // multiply codeword and error vector with P mG = (GF2Vector)mG.multiply(p); errors = (GF2Vector)errors.multiply(p); // extract plaintext vector (last k columns of mG) GF2Vector m = mG.extractRightVector(k); // return vectors return new GF2Vector[]{m, errors}; }
int k = privKey.getK(); Permutation p = privKey.getP(); GF2mField field = privKey.getField();
int k = privKey.getK(); Permutation p = privKey.getP(); GF2mField field = privKey.getField();