// 
// Decompiled by Procyon v0.6.0
// 

package org.bouncycastle.its.jcajce;

import org.bouncycastle.math.field.Polynomial;
import java.security.spec.ECFieldF2m;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.math.field.PolynomialExtensionField;
import java.security.spec.ECFieldFp;
import org.bouncycastle.math.ec.ECAlgorithms;
import java.security.spec.ECField;
import org.bouncycastle.math.field.FiniteField;
import java.security.spec.ECParameterSpec;
import org.bouncycastle.asn1.x9.X9ECParameters;
import java.security.spec.EllipticCurve;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECPoint;

class ECUtil
{
    static java.security.spec.ECPoint convertPoint(ECPoint normalize) {
        normalize = normalize.normalize();
        return new java.security.spec.ECPoint(normalize.getAffineXCoord().toBigInteger(), normalize.getAffineYCoord().toBigInteger());
    }
    
    public static EllipticCurve convertCurve(final ECCurve ecCurve, final byte[] array) {
        return new EllipticCurve(convertField(ecCurve.getField()), ecCurve.getA().toBigInteger(), ecCurve.getB().toBigInteger(), null);
    }
    
    public static ECParameterSpec convertToSpec(final X9ECParameters x9ECParameters) {
        return new ECParameterSpec(convertCurve(x9ECParameters.getCurve(), null), convertPoint(x9ECParameters.getG()), x9ECParameters.getN(), x9ECParameters.getH().intValue());
    }
    
    public static ECField convertField(final FiniteField finiteField) {
        if (ECAlgorithms.isFpField(finiteField)) {
            return new ECFieldFp(finiteField.getCharacteristic());
        }
        final Polynomial minimalPolynomial = ((PolynomialExtensionField)finiteField).getMinimalPolynomial();
        final int[] exponentsPresent = minimalPolynomial.getExponentsPresent();
        return new ECFieldF2m(minimalPolynomial.getDegree(), Arrays.reverseInPlace(Arrays.copyOfRange(exponentsPresent, 1, exponentsPresent.length - 1)));
    }
}