186 lines
6.9 KiB
Java
186 lines
6.9 KiB
Java
package org.bouncycastle.math.ec.custom.sec;
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import java.math.BigInteger;
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import org.bouncycastle.math.ec.ECFieldElement;
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import org.bouncycastle.math.raw.Mod;
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import org.bouncycastle.math.raw.Nat224;
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import org.bouncycastle.util.Arrays;
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/* loaded from: classes6.dex */
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public class SecP224K1FieldElement extends ECFieldElement {
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protected int[] x;
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public static final BigInteger Q = SecP224K1Curve.q;
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private static final int[] PRECOMP_POW2 = {868209154, -587542221, 579297866, -1014948952, -1470801668, 514782679, -1897982644};
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public BigInteger toBigInteger() {
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return Nat224.toBigInteger(this.x);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public boolean testBitZero() {
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return Nat224.getBit(this.x, 0) == 1;
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement subtract(ECFieldElement eCFieldElement) {
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int[] create = Nat224.create();
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SecP224K1Field.subtract(this.x, ((SecP224K1FieldElement) eCFieldElement).x, create);
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return new SecP224K1FieldElement(create);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement square() {
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int[] create = Nat224.create();
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SecP224K1Field.square(this.x, create);
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return new SecP224K1FieldElement(create);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement sqrt() {
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int[] iArr = this.x;
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if (Nat224.isZero(iArr) || Nat224.isOne(iArr)) {
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return this;
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}
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int[] create = Nat224.create();
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SecP224K1Field.square(iArr, create);
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SecP224K1Field.multiply(create, iArr, create);
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SecP224K1Field.square(create, create);
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SecP224K1Field.multiply(create, iArr, create);
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int[] create2 = Nat224.create();
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SecP224K1Field.square(create, create2);
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SecP224K1Field.multiply(create2, iArr, create2);
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int[] create3 = Nat224.create();
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SecP224K1Field.squareN(create2, 4, create3);
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SecP224K1Field.multiply(create3, create2, create3);
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int[] create4 = Nat224.create();
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SecP224K1Field.squareN(create3, 3, create4);
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SecP224K1Field.multiply(create4, create, create4);
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SecP224K1Field.squareN(create4, 8, create4);
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SecP224K1Field.multiply(create4, create3, create4);
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SecP224K1Field.squareN(create4, 4, create3);
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SecP224K1Field.multiply(create3, create2, create3);
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SecP224K1Field.squareN(create3, 19, create2);
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SecP224K1Field.multiply(create2, create4, create2);
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int[] create5 = Nat224.create();
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SecP224K1Field.squareN(create2, 42, create5);
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SecP224K1Field.multiply(create5, create2, create5);
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SecP224K1Field.squareN(create5, 23, create2);
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SecP224K1Field.multiply(create2, create3, create2);
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SecP224K1Field.squareN(create2, 84, create3);
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SecP224K1Field.multiply(create3, create5, create3);
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SecP224K1Field.squareN(create3, 20, create3);
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SecP224K1Field.multiply(create3, create4, create3);
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SecP224K1Field.squareN(create3, 3, create3);
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SecP224K1Field.multiply(create3, iArr, create3);
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SecP224K1Field.squareN(create3, 2, create3);
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SecP224K1Field.multiply(create3, iArr, create3);
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SecP224K1Field.squareN(create3, 4, create3);
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SecP224K1Field.multiply(create3, create, create3);
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SecP224K1Field.square(create3, create3);
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SecP224K1Field.square(create3, create5);
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if (Nat224.eq(iArr, create5)) {
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return new SecP224K1FieldElement(create3);
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}
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SecP224K1Field.multiply(create3, PRECOMP_POW2, create3);
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SecP224K1Field.square(create3, create5);
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if (Nat224.eq(iArr, create5)) {
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return new SecP224K1FieldElement(create3);
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}
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return null;
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement negate() {
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int[] create = Nat224.create();
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SecP224K1Field.negate(this.x, create);
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return new SecP224K1FieldElement(create);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement multiply(ECFieldElement eCFieldElement) {
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int[] create = Nat224.create();
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SecP224K1Field.multiply(this.x, ((SecP224K1FieldElement) eCFieldElement).x, create);
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return new SecP224K1FieldElement(create);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public boolean isZero() {
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return Nat224.isZero(this.x);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public boolean isOne() {
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return Nat224.isOne(this.x);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement invert() {
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int[] create = Nat224.create();
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Mod.invert(SecP224K1Field.P, this.x, create);
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return new SecP224K1FieldElement(create);
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}
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public int hashCode() {
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return Q.hashCode() ^ Arrays.hashCode(this.x, 0, 7);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public int getFieldSize() {
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return Q.bitLength();
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public String getFieldName() {
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return "SecP224K1Field";
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}
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public boolean equals(Object obj) {
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if (obj == this) {
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return true;
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}
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if (obj instanceof SecP224K1FieldElement) {
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return Nat224.eq(this.x, ((SecP224K1FieldElement) obj).x);
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}
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return false;
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement divide(ECFieldElement eCFieldElement) {
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int[] create = Nat224.create();
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Mod.invert(SecP224K1Field.P, ((SecP224K1FieldElement) eCFieldElement).x, create);
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SecP224K1Field.multiply(create, this.x, create);
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return new SecP224K1FieldElement(create);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement addOne() {
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int[] create = Nat224.create();
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SecP224K1Field.addOne(this.x, create);
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return new SecP224K1FieldElement(create);
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}
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@Override // org.bouncycastle.math.ec.ECFieldElement
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public ECFieldElement add(ECFieldElement eCFieldElement) {
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int[] create = Nat224.create();
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SecP224K1Field.add(this.x, ((SecP224K1FieldElement) eCFieldElement).x, create);
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return new SecP224K1FieldElement(create);
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}
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/* JADX INFO: Access modifiers changed from: protected */
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public SecP224K1FieldElement(int[] iArr) {
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this.x = iArr;
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}
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public SecP224K1FieldElement(BigInteger bigInteger) {
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if (bigInteger == null || bigInteger.signum() < 0 || bigInteger.compareTo(Q) >= 0) {
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throw new IllegalArgumentException("x value invalid for SecP224K1FieldElement");
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}
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this.x = SecP224K1Field.fromBigInteger(bigInteger);
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}
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public SecP224K1FieldElement() {
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this.x = Nat224.create();
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}
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}
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