130 lines
4.4 KiB
Java
130 lines
4.4 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.raw.Nat;
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import org.bouncycastle.math.raw.Nat224;
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/* loaded from: classes6.dex */
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public class SecP224K1Field {
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private static final int P6 = -1;
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private static final int PExt13 = -1;
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private static final int PInv33 = 6803;
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static final int[] P = {-6803, -2, -1, -1, -1, -1, -1};
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static final int[] PExt = {46280809, 13606, 1, 0, 0, 0, 0, -13606, -3, -1, -1, -1, -1, -1};
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private static final int[] PExtInv = {-46280809, -13607, -2, -1, -1, -1, -1, 13605, 2};
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public static void twice(int[] iArr, int[] iArr2) {
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if (Nat.shiftUpBit(7, iArr, 0, iArr2) != 0 || (iArr2[6] == -1 && Nat224.gte(iArr2, P))) {
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Nat.add33To(7, PInv33, iArr2);
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}
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}
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public static void subtractExt(int[] iArr, int[] iArr2, int[] iArr3) {
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if (Nat.sub(14, iArr, iArr2, iArr3) != 0) {
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int[] iArr4 = PExtInv;
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if (Nat.subFrom(iArr4.length, iArr4, iArr3) != 0) {
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Nat.decAt(14, iArr3, iArr4.length);
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}
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}
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}
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public static void subtract(int[] iArr, int[] iArr2, int[] iArr3) {
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if (Nat224.sub(iArr, iArr2, iArr3) != 0) {
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Nat.sub33From(7, PInv33, iArr3);
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}
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}
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public static void squareN(int[] iArr, int i, int[] iArr2) {
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int[] createExt = Nat224.createExt();
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Nat224.square(iArr, createExt);
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while (true) {
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reduce(createExt, iArr2);
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i--;
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if (i <= 0) {
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return;
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} else {
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Nat224.square(iArr2, createExt);
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}
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}
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}
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public static void square(int[] iArr, int[] iArr2) {
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int[] createExt = Nat224.createExt();
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Nat224.square(iArr, createExt);
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reduce(createExt, iArr2);
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}
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public static void reduce32(int i, int[] iArr) {
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if ((i == 0 || Nat224.mul33WordAdd(PInv33, i, iArr, 0) == 0) && !(iArr[6] == -1 && Nat224.gte(iArr, P))) {
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return;
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}
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Nat.add33To(7, PInv33, iArr);
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}
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public static void reduce(int[] iArr, int[] iArr2) {
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if (Nat224.mul33DWordAdd(PInv33, Nat224.mul33Add(PInv33, iArr, 7, iArr, 0, iArr2, 0), iArr2, 0) != 0 || (iArr2[6] == -1 && Nat224.gte(iArr2, P))) {
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Nat.add33To(7, PInv33, iArr2);
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}
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}
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public static void negate(int[] iArr, int[] iArr2) {
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if (Nat224.isZero(iArr)) {
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Nat224.zero(iArr2);
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} else {
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Nat224.sub(P, iArr, iArr2);
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}
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}
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public static void multiplyAddToExt(int[] iArr, int[] iArr2, int[] iArr3) {
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if (Nat224.mulAddTo(iArr, iArr2, iArr3) != 0 || (iArr3[13] == -1 && Nat.gte(14, iArr3, PExt))) {
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int[] iArr4 = PExtInv;
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if (Nat.addTo(iArr4.length, iArr4, iArr3) != 0) {
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Nat.incAt(14, iArr3, iArr4.length);
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}
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}
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}
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public static void multiply(int[] iArr, int[] iArr2, int[] iArr3) {
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int[] createExt = Nat224.createExt();
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Nat224.mul(iArr, iArr2, createExt);
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reduce(createExt, iArr3);
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}
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public static void half(int[] iArr, int[] iArr2) {
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if ((iArr[0] & 1) == 0) {
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Nat.shiftDownBit(7, iArr, 0, iArr2);
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} else {
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Nat.shiftDownBit(7, iArr2, Nat224.add(iArr, P, iArr2));
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}
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}
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public static int[] fromBigInteger(BigInteger bigInteger) {
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int[] fromBigInteger = Nat224.fromBigInteger(bigInteger);
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if (fromBigInteger[6] == -1 && Nat224.gte(fromBigInteger, P)) {
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Nat.add33To(7, PInv33, fromBigInteger);
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}
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return fromBigInteger;
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}
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public static void addOne(int[] iArr, int[] iArr2) {
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if (Nat.inc(7, iArr, iArr2) != 0 || (iArr2[6] == -1 && Nat224.gte(iArr2, P))) {
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Nat.add33To(7, PInv33, iArr2);
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}
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}
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public static void addExt(int[] iArr, int[] iArr2, int[] iArr3) {
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if (Nat.add(14, iArr, iArr2, iArr3) != 0 || (iArr3[13] == -1 && Nat.gte(14, iArr3, PExt))) {
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int[] iArr4 = PExtInv;
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if (Nat.addTo(iArr4.length, iArr4, iArr3) != 0) {
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Nat.incAt(14, iArr3, iArr4.length);
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}
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}
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}
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public static void add(int[] iArr, int[] iArr2, int[] iArr3) {
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if (Nat224.add(iArr, iArr2, iArr3) != 0 || (iArr3[6] == -1 && Nat224.gte(iArr3, P))) {
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Nat.add33To(7, PInv33, iArr3);
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}
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}
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}
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