23 lines
861 B
Java
23 lines
861 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 ZSignedDigitR2LMultiplier 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 infinity = eCPoint.getCurve().getInfinity();
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int bitLength = bigInteger.bitLength();
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int lowestSetBit = bigInteger.getLowestSetBit();
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ECPoint timesPow2 = eCPoint.timesPow2(lowestSetBit);
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while (true) {
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lowestSetBit++;
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if (lowestSetBit >= bitLength) {
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return infinity.add(timesPow2);
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}
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infinity = infinity.add(bigInteger.testBit(lowestSetBit) ? timesPow2 : timesPow2.negate());
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timesPow2 = timesPow2.twice();
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}
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}
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}
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