67 lines
2.9 KiB
Java
67 lines
2.9 KiB
Java
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package org.bouncycastle.jce.spec;
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import java.math.BigInteger;
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import java.security.spec.ECField;
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import java.security.spec.ECFieldF2m;
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import java.security.spec.ECFieldFp;
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import java.security.spec.ECPoint;
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import java.security.spec.EllipticCurve;
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import org.bouncycastle.math.ec.ECAlgorithms;
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import org.bouncycastle.math.ec.ECCurve;
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import org.bouncycastle.math.field.FiniteField;
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import org.bouncycastle.math.field.Polynomial;
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import org.bouncycastle.math.field.PolynomialExtensionField;
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import org.bouncycastle.util.Arrays;
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/* loaded from: classes6.dex */
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public class ECNamedCurveSpec extends java.security.spec.ECParameterSpec {
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private String name;
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public String getName() {
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return this.name;
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}
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private static ECPoint convertPoint(org.bouncycastle.math.ec.ECPoint eCPoint) {
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org.bouncycastle.math.ec.ECPoint normalize = eCPoint.normalize();
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return new ECPoint(normalize.getAffineXCoord().toBigInteger(), normalize.getAffineYCoord().toBigInteger());
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}
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private static ECField convertField(FiniteField finiteField) {
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if (ECAlgorithms.isFpField(finiteField)) {
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return new ECFieldFp(finiteField.getCharacteristic());
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}
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Polynomial minimalPolynomial = ((PolynomialExtensionField) finiteField).getMinimalPolynomial();
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int[] exponentsPresent = minimalPolynomial.getExponentsPresent();
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return new ECFieldF2m(minimalPolynomial.getDegree(), Arrays.reverse(Arrays.copyOfRange(exponentsPresent, 1, exponentsPresent.length - 1)));
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}
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private static EllipticCurve convertCurve(ECCurve eCCurve, byte[] bArr) {
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return new EllipticCurve(convertField(eCCurve.getField()), eCCurve.getA().toBigInteger(), eCCurve.getB().toBigInteger(), bArr);
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}
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public ECNamedCurveSpec(String str, ECCurve eCCurve, org.bouncycastle.math.ec.ECPoint eCPoint, BigInteger bigInteger, BigInteger bigInteger2, byte[] bArr) {
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super(convertCurve(eCCurve, bArr), convertPoint(eCPoint), bigInteger, bigInteger2.intValue());
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this.name = str;
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}
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public ECNamedCurveSpec(String str, ECCurve eCCurve, org.bouncycastle.math.ec.ECPoint eCPoint, BigInteger bigInteger, BigInteger bigInteger2) {
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super(convertCurve(eCCurve, null), convertPoint(eCPoint), bigInteger, bigInteger2.intValue());
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this.name = str;
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}
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public ECNamedCurveSpec(String str, ECCurve eCCurve, org.bouncycastle.math.ec.ECPoint eCPoint, BigInteger bigInteger) {
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super(convertCurve(eCCurve, null), convertPoint(eCPoint), bigInteger, 1);
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this.name = str;
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}
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public ECNamedCurveSpec(String str, EllipticCurve ellipticCurve, ECPoint eCPoint, BigInteger bigInteger, BigInteger bigInteger2) {
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super(ellipticCurve, eCPoint, bigInteger, bigInteger2.intValue());
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this.name = str;
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}
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public ECNamedCurveSpec(String str, EllipticCurve ellipticCurve, ECPoint eCPoint, BigInteger bigInteger) {
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super(ellipticCurve, eCPoint, bigInteger, 1);
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this.name = str;
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}
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}
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