23 lines
1.3 KiB
Java
23 lines
1.3 KiB
Java
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package org.bouncycastle.jce;
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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.ECCurve;
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/* loaded from: classes6.dex */
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public class ECPointUtil {
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public static ECPoint decodePoint(EllipticCurve ellipticCurve, byte[] bArr) {
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ECCurve f2m;
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if (ellipticCurve.getField() instanceof ECFieldFp) {
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f2m = new ECCurve.Fp(((ECFieldFp) ellipticCurve.getField()).getP(), ellipticCurve.getA(), ellipticCurve.getB());
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} else {
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int[] midTermsOfReductionPolynomial = ((ECFieldF2m) ellipticCurve.getField()).getMidTermsOfReductionPolynomial();
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f2m = midTermsOfReductionPolynomial.length == 3 ? new ECCurve.F2m(((ECFieldF2m) ellipticCurve.getField()).getM(), midTermsOfReductionPolynomial[2], midTermsOfReductionPolynomial[1], midTermsOfReductionPolynomial[0], ellipticCurve.getA(), ellipticCurve.getB()) : new ECCurve.F2m(((ECFieldF2m) ellipticCurve.getField()).getM(), midTermsOfReductionPolynomial[0], ellipticCurve.getA(), ellipticCurve.getB());
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}
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org.bouncycastle.math.ec.ECPoint decodePoint = f2m.decodePoint(bArr);
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return new ECPoint(decodePoint.getAffineXCoord().toBigInteger(), decodePoint.getAffineYCoord().toBigInteger());
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}
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}
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