213 lines
9.6 KiB
Java
213 lines
9.6 KiB
Java
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package org.bouncycastle.math.ec.custom.sec;
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import org.bouncycastle.math.ec.ECConstants;
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import org.bouncycastle.math.ec.ECCurve;
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import org.bouncycastle.math.ec.ECFieldElement;
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import org.bouncycastle.math.ec.ECPoint;
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/* loaded from: classes6.dex */
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public class SecT113R2Point extends ECPoint.AbstractF2m {
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@Override // org.bouncycastle.math.ec.ECPoint
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public ECPoint twicePlus(ECPoint eCPoint) {
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if (isInfinity()) {
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return eCPoint;
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}
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if (eCPoint.isInfinity()) {
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return twice();
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}
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ECCurve curve = getCurve();
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ECFieldElement eCFieldElement = this.x;
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if (eCFieldElement.isZero()) {
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return eCPoint;
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}
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ECFieldElement rawXCoord = eCPoint.getRawXCoord();
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ECFieldElement zCoord = eCPoint.getZCoord(0);
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if (rawXCoord.isZero() || !zCoord.isOne()) {
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return twice().add(eCPoint);
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}
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ECFieldElement eCFieldElement2 = this.y;
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ECFieldElement eCFieldElement3 = this.zs[0];
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ECFieldElement rawYCoord = eCPoint.getRawYCoord();
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ECFieldElement square = eCFieldElement.square();
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ECFieldElement square2 = eCFieldElement2.square();
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ECFieldElement square3 = eCFieldElement3.square();
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ECFieldElement add = curve.getA().multiply(square3).add(square2).add(eCFieldElement2.multiply(eCFieldElement3));
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ECFieldElement addOne = rawYCoord.addOne();
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ECFieldElement multiplyPlusProduct = curve.getA().add(addOne).multiply(square3).add(square2).multiplyPlusProduct(add, square, square3);
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ECFieldElement multiply = rawXCoord.multiply(square3);
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ECFieldElement square4 = multiply.add(add).square();
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if (square4.isZero()) {
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return multiplyPlusProduct.isZero() ? eCPoint.twice() : curve.getInfinity();
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}
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if (multiplyPlusProduct.isZero()) {
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return new SecT113R2Point(curve, multiplyPlusProduct, curve.getB().sqrt(), this.withCompression);
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}
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ECFieldElement multiply2 = multiplyPlusProduct.square().multiply(multiply);
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ECFieldElement multiply3 = multiplyPlusProduct.multiply(square4).multiply(square3);
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return new SecT113R2Point(curve, multiply2, multiplyPlusProduct.add(square4).square().multiplyPlusProduct(add, addOne, multiply3), new ECFieldElement[]{multiply3}, this.withCompression);
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}
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@Override // org.bouncycastle.math.ec.ECPoint
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public ECPoint twice() {
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if (isInfinity()) {
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return this;
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}
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ECCurve curve = getCurve();
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ECFieldElement eCFieldElement = this.x;
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if (eCFieldElement.isZero()) {
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return curve.getInfinity();
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}
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ECFieldElement eCFieldElement2 = this.y;
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ECFieldElement eCFieldElement3 = this.zs[0];
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boolean isOne = eCFieldElement3.isOne();
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ECFieldElement multiply = isOne ? eCFieldElement2 : eCFieldElement2.multiply(eCFieldElement3);
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ECFieldElement square = isOne ? eCFieldElement3 : eCFieldElement3.square();
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ECFieldElement a = curve.getA();
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if (!isOne) {
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a = a.multiply(square);
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}
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ECFieldElement add = eCFieldElement2.square().add(multiply).add(a);
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if (add.isZero()) {
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return new SecT113R2Point(curve, add, curve.getB().sqrt(), this.withCompression);
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}
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ECFieldElement square2 = add.square();
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ECFieldElement multiply2 = isOne ? add : add.multiply(square);
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if (!isOne) {
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eCFieldElement = eCFieldElement.multiply(eCFieldElement3);
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}
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return new SecT113R2Point(curve, square2, eCFieldElement.squarePlusProduct(add, multiply).add(square2).add(multiply2), new ECFieldElement[]{multiply2}, this.withCompression);
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}
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@Override // org.bouncycastle.math.ec.ECPoint
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public ECPoint negate() {
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if (isInfinity()) {
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return this;
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}
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ECFieldElement eCFieldElement = this.x;
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if (eCFieldElement.isZero()) {
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return this;
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}
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ECFieldElement eCFieldElement2 = this.y;
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ECFieldElement eCFieldElement3 = this.zs[0];
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return new SecT113R2Point(this.curve, eCFieldElement, eCFieldElement2.add(eCFieldElement3), new ECFieldElement[]{eCFieldElement3}, this.withCompression);
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}
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@Override // org.bouncycastle.math.ec.ECPoint
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public ECFieldElement getYCoord() {
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ECFieldElement eCFieldElement = this.x;
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ECFieldElement eCFieldElement2 = this.y;
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if (isInfinity() || eCFieldElement.isZero()) {
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return eCFieldElement2;
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}
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ECFieldElement multiply = eCFieldElement2.add(eCFieldElement).multiply(eCFieldElement);
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ECFieldElement eCFieldElement3 = this.zs[0];
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return !eCFieldElement3.isOne() ? multiply.divide(eCFieldElement3) : multiply;
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}
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@Override // org.bouncycastle.math.ec.ECPoint
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public boolean getCompressionYTilde() {
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ECFieldElement rawXCoord = getRawXCoord();
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return (rawXCoord.isZero() || getRawYCoord().testBitZero() == rawXCoord.testBitZero()) ? false : true;
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}
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@Override // org.bouncycastle.math.ec.ECPoint
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public ECPoint detach() {
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return new SecT113R2Point(null, getAffineXCoord(), getAffineYCoord());
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}
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@Override // org.bouncycastle.math.ec.ECPoint
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public ECPoint add(ECPoint eCPoint) {
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ECFieldElement eCFieldElement;
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ECFieldElement eCFieldElement2;
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ECFieldElement eCFieldElement3;
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ECFieldElement eCFieldElement4;
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ECFieldElement eCFieldElement5;
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ECFieldElement eCFieldElement6;
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if (isInfinity()) {
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return eCPoint;
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}
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if (eCPoint.isInfinity()) {
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return this;
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}
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ECCurve curve = getCurve();
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ECFieldElement eCFieldElement7 = this.x;
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ECFieldElement rawXCoord = eCPoint.getRawXCoord();
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if (eCFieldElement7.isZero()) {
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return rawXCoord.isZero() ? curve.getInfinity() : eCPoint.add(this);
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}
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ECFieldElement eCFieldElement8 = this.y;
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ECFieldElement eCFieldElement9 = this.zs[0];
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ECFieldElement rawYCoord = eCPoint.getRawYCoord();
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ECFieldElement zCoord = eCPoint.getZCoord(0);
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boolean isOne = eCFieldElement9.isOne();
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if (isOne) {
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eCFieldElement = rawXCoord;
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eCFieldElement2 = rawYCoord;
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} else {
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eCFieldElement = rawXCoord.multiply(eCFieldElement9);
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eCFieldElement2 = rawYCoord.multiply(eCFieldElement9);
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}
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boolean isOne2 = zCoord.isOne();
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if (isOne2) {
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eCFieldElement3 = eCFieldElement8;
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} else {
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eCFieldElement7 = eCFieldElement7.multiply(zCoord);
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eCFieldElement3 = eCFieldElement8.multiply(zCoord);
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}
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ECFieldElement add = eCFieldElement3.add(eCFieldElement2);
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ECFieldElement add2 = eCFieldElement7.add(eCFieldElement);
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if (add2.isZero()) {
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return add.isZero() ? twice() : curve.getInfinity();
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}
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if (rawXCoord.isZero()) {
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ECPoint normalize = normalize();
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ECFieldElement xCoord = normalize.getXCoord();
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ECFieldElement yCoord = normalize.getYCoord();
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ECFieldElement divide = yCoord.add(rawYCoord).divide(xCoord);
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eCFieldElement5 = divide.square().add(divide).add(xCoord).add(curve.getA());
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if (eCFieldElement5.isZero()) {
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return new SecT113R2Point(curve, eCFieldElement5, curve.getB().sqrt(), this.withCompression);
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}
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ECFieldElement add3 = divide.multiply(xCoord.add(eCFieldElement5)).add(eCFieldElement5).add(yCoord).divide(eCFieldElement5).add(eCFieldElement5);
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eCFieldElement6 = curve.fromBigInteger(ECConstants.ONE);
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eCFieldElement4 = add3;
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} else {
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ECFieldElement square = add2.square();
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ECFieldElement multiply = add.multiply(eCFieldElement7);
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ECFieldElement multiply2 = add.multiply(eCFieldElement);
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ECFieldElement multiply3 = multiply.multiply(multiply2);
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if (multiply3.isZero()) {
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return new SecT113R2Point(curve, multiply3, curve.getB().sqrt(), this.withCompression);
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}
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ECFieldElement multiply4 = add.multiply(square);
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if (!isOne2) {
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multiply4 = multiply4.multiply(zCoord);
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}
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ECFieldElement squarePlusProduct = multiply2.add(square).squarePlusProduct(multiply4, eCFieldElement8.add(eCFieldElement9));
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ECFieldElement multiply5 = !isOne ? multiply4.multiply(eCFieldElement9) : multiply4;
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eCFieldElement4 = squarePlusProduct;
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eCFieldElement5 = multiply3;
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eCFieldElement6 = multiply5;
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}
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return new SecT113R2Point(curve, eCFieldElement5, eCFieldElement4, new ECFieldElement[]{eCFieldElement6}, this.withCompression);
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public SecT113R2Point(ECCurve eCCurve, ECFieldElement eCFieldElement, ECFieldElement eCFieldElement2, ECFieldElement[] eCFieldElementArr, boolean z) {
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super(eCCurve, eCFieldElement, eCFieldElement2, eCFieldElementArr);
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this.withCompression = z;
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}
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public SecT113R2Point(ECCurve eCCurve, ECFieldElement eCFieldElement, ECFieldElement eCFieldElement2, boolean z) {
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super(eCCurve, eCFieldElement, eCFieldElement2);
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if ((eCFieldElement == null) != (eCFieldElement2 == null)) {
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throw new IllegalArgumentException("Exactly one of the field elements is null");
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}
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this.withCompression = z;
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}
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public SecT113R2Point(ECCurve eCCurve, ECFieldElement eCFieldElement, ECFieldElement eCFieldElement2) {
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this(eCCurve, eCFieldElement, eCFieldElement2, false);
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}
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}
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