23 lines
825 B
Java
23 lines
825 B
Java
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package org.bouncycastle.math.ec;
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import java.math.BigInteger;
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/* loaded from: classes6.dex */
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public class ZSignedDigitL2RMultiplier extends AbstractECMultiplier {
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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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ECPoint normalize = eCPoint.normalize();
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ECPoint negate = normalize.negate();
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int bitLength = bigInteger.bitLength();
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int lowestSetBit = bigInteger.getLowestSetBit();
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ECPoint eCPoint2 = normalize;
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while (true) {
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bitLength--;
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if (bitLength <= lowestSetBit) {
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return eCPoint2.timesPow2(lowestSetBit);
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}
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eCPoint2 = eCPoint2.twicePlus(bigInteger.testBit(bitLength) ? normalize : negate);
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}
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}
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}
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