31 lines
1.4 KiB
Java
31 lines
1.4 KiB
Java
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package org.bouncycastle.math.ec;
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import java.math.BigInteger;
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import org.bouncycastle.math.ec.endo.GLVEndomorphism;
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/* loaded from: classes6.dex */
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public class GLVMultiplier extends AbstractECMultiplier {
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protected final ECCurve curve;
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protected final GLVEndomorphism glvEndomorphism;
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@Override // org.bouncycastle.math.ec.AbstractECMultiplier
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protected ECPoint multiplyPositive(ECPoint eCPoint, BigInteger bigInteger) {
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if (!this.curve.equals(eCPoint.getCurve())) {
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throw new IllegalStateException();
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}
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BigInteger[] decomposeScalar = this.glvEndomorphism.decomposeScalar(bigInteger.mod(eCPoint.getCurve().getOrder()));
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BigInteger bigInteger2 = decomposeScalar[0];
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BigInteger bigInteger3 = decomposeScalar[1];
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ECPointMap pointMap = this.glvEndomorphism.getPointMap();
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return this.glvEndomorphism.hasEfficientPointMap() ? ECAlgorithms.implShamirsTrickWNaf(eCPoint, bigInteger2, pointMap, bigInteger3) : ECAlgorithms.implShamirsTrickWNaf(eCPoint, bigInteger2, pointMap.map(eCPoint), bigInteger3);
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}
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public GLVMultiplier(ECCurve eCCurve, GLVEndomorphism gLVEndomorphism) {
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if (eCCurve == null || eCCurve.getOrder() == null) {
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throw new IllegalArgumentException("Need curve with known group order");
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}
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this.curve = eCCurve;
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this.glvEndomorphism = gLVEndomorphism;
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}
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}
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