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-rw-r--r--core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP256R1Point.java308
1 files changed, 0 insertions, 308 deletions
diff --git a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP256R1Point.java b/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP256R1Point.java
deleted file mode 100644
index 930fdc58..00000000
--- a/core/src/main/java/org/bouncycastle/math/ec/custom/sec/SecP256R1Point.java
+++ /dev/null
@@ -1,308 +0,0 @@
-package org.bouncycastle.math.ec.custom.sec;
-
-import org.bouncycastle.math.ec.ECCurve;
-import org.bouncycastle.math.ec.ECFieldElement;
-import org.bouncycastle.math.ec.ECPoint;
-import org.bouncycastle.math.raw.Nat;
-import org.bouncycastle.math.raw.Nat256;
-
-public class SecP256R1Point extends ECPoint.AbstractFp
-{
- /**
- * Create a point which encodes with point compression.
- *
- * @param curve
- * the curve to use
- * @param x
- * affine x co-ordinate
- * @param y
- * affine y co-ordinate
- *
- * @deprecated Use ECCurve.createPoint to construct points
- */
- public SecP256R1Point(ECCurve curve, ECFieldElement x, ECFieldElement y)
- {
- this(curve, x, y, false);
- }
-
- /**
- * Create a point that encodes with or without point compresion.
- *
- * @param curve
- * the curve to use
- * @param x
- * affine x co-ordinate
- * @param y
- * affine y co-ordinate
- * @param withCompression
- * if true encode with point compression
- *
- * @deprecated per-point compression property will be removed, refer
- * {@link #getEncoded(boolean)}
- */
- public SecP256R1Point(ECCurve curve, ECFieldElement x, ECFieldElement y, boolean withCompression)
- {
- super(curve, x, y);
-
- if ((x == null) != (y == null))
- {
- throw new IllegalArgumentException("Exactly one of the field elements is null");
- }
-
- this.withCompression = withCompression;
- }
-
- SecP256R1Point(ECCurve curve, ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, boolean withCompression)
- {
- super(curve, x, y, zs);
-
- this.withCompression = withCompression;
- }
-
- protected ECPoint detach()
- {
- return new SecP256R1Point(null, getAffineXCoord(), getAffineYCoord());
- }
-
- public ECPoint add(ECPoint b)
- {
- if (this.isInfinity())
- {
- return b;
- }
- if (b.isInfinity())
- {
- return this;
- }
- if (this == b)
- {
- return twice();
- }
-
- ECCurve curve = this.getCurve();
-
- SecP256R1FieldElement X1 = (SecP256R1FieldElement)this.x, Y1 = (SecP256R1FieldElement)this.y;
- SecP256R1FieldElement X2 = (SecP256R1FieldElement)b.getXCoord(), Y2 = (SecP256R1FieldElement)b.getYCoord();
-
- SecP256R1FieldElement Z1 = (SecP256R1FieldElement)this.zs[0];
- SecP256R1FieldElement Z2 = (SecP256R1FieldElement)b.getZCoord(0);
-
- int c;
- int[] tt1 = Nat256.createExt();
- int[] t2 = Nat256.create();
- int[] t3 = Nat256.create();
- int[] t4 = Nat256.create();
-
- boolean Z1IsOne = Z1.isOne();
- int[] U2, S2;
- if (Z1IsOne)
- {
- U2 = X2.x;
- S2 = Y2.x;
- }
- else
- {
- S2 = t3;
- SecP256R1Field.square(Z1.x, S2);
-
- U2 = t2;
- SecP256R1Field.multiply(S2, X2.x, U2);
-
- SecP256R1Field.multiply(S2, Z1.x, S2);
- SecP256R1Field.multiply(S2, Y2.x, S2);
- }
-
- boolean Z2IsOne = Z2.isOne();
- int[] U1, S1;
- if (Z2IsOne)
- {
- U1 = X1.x;
- S1 = Y1.x;
- }
- else
- {
- S1 = t4;
- SecP256R1Field.square(Z2.x, S1);
-
- U1 = tt1;
- SecP256R1Field.multiply(S1, X1.x, U1);
-
- SecP256R1Field.multiply(S1, Z2.x, S1);
- SecP256R1Field.multiply(S1, Y1.x, S1);
- }
-
- int[] H = Nat256.create();
- SecP256R1Field.subtract(U1, U2, H);
-
- int[] R = t2;
- SecP256R1Field.subtract(S1, S2, R);
-
- // Check if b == this or b == -this
- if (Nat256.isZero(H))
- {
- if (Nat256.isZero(R))
- {
- // this == b, i.e. this must be doubled
- return this.twice();
- }
-
- // this == -b, i.e. the result is the point at infinity
- return curve.getInfinity();
- }
-
- int[] HSquared = t3;
- SecP256R1Field.square(H, HSquared);
-
- int[] G = Nat256.create();
- SecP256R1Field.multiply(HSquared, H, G);
-
- int[] V = t3;
- SecP256R1Field.multiply(HSquared, U1, V);
-
- SecP256R1Field.negate(G, G);
- Nat256.mul(S1, G, tt1);
-
- c = Nat256.addBothTo(V, V, G);
- SecP256R1Field.reduce32(c, G);
-
- SecP256R1FieldElement X3 = new SecP256R1FieldElement(t4);
- SecP256R1Field.square(R, X3.x);
- SecP256R1Field.subtract(X3.x, G, X3.x);
-
- SecP256R1FieldElement Y3 = new SecP256R1FieldElement(G);
- SecP256R1Field.subtract(V, X3.x, Y3.x);
- SecP256R1Field.multiplyAddToExt(Y3.x, R, tt1);
- SecP256R1Field.reduce(tt1, Y3.x);
-
- SecP256R1FieldElement Z3 = new SecP256R1FieldElement(H);
- if (!Z1IsOne)
- {
- SecP256R1Field.multiply(Z3.x, Z1.x, Z3.x);
- }
- if (!Z2IsOne)
- {
- SecP256R1Field.multiply(Z3.x, Z2.x, Z3.x);
- }
-
- ECFieldElement[] zs = new ECFieldElement[]{ Z3 };
-
- return new SecP256R1Point(curve, X3, Y3, zs, this.withCompression);
- }
-
- public ECPoint twice()
- {
- if (this.isInfinity())
- {
- return this;
- }
-
- ECCurve curve = this.getCurve();
-
- SecP256R1FieldElement Y1 = (SecP256R1FieldElement)this.y;
- if (Y1.isZero())
- {
- return curve.getInfinity();
- }
-
- SecP256R1FieldElement X1 = (SecP256R1FieldElement)this.x, Z1 = (SecP256R1FieldElement)this.zs[0];
-
- int c;
- int[] t1 = Nat256.create();
- int[] t2 = Nat256.create();
-
- int[] Y1Squared = Nat256.create();
- SecP256R1Field.square(Y1.x, Y1Squared);
-
- int[] T = Nat256.create();
- SecP256R1Field.square(Y1Squared, T);
-
- boolean Z1IsOne = Z1.isOne();
-
- int[] Z1Squared = Z1.x;
- if (!Z1IsOne)
- {
- Z1Squared = t2;
- SecP256R1Field.square(Z1.x, Z1Squared);
- }
-
- SecP256R1Field.subtract(X1.x, Z1Squared, t1);
-
- int[] M = t2;
- SecP256R1Field.add(X1.x, Z1Squared, M);
- SecP256R1Field.multiply(M, t1, M);
- c = Nat256.addBothTo(M, M, M);
- SecP256R1Field.reduce32(c, M);
-
- int[] S = Y1Squared;
- SecP256R1Field.multiply(Y1Squared, X1.x, S);
- c = Nat.shiftUpBits(8, S, 2, 0);
- SecP256R1Field.reduce32(c, S);
-
- c = Nat.shiftUpBits(8, T, 3, 0, t1);
- SecP256R1Field.reduce32(c, t1);
-
- SecP256R1FieldElement X3 = new SecP256R1FieldElement(T);
- SecP256R1Field.square(M, X3.x);
- SecP256R1Field.subtract(X3.x, S, X3.x);
- SecP256R1Field.subtract(X3.x, S, X3.x);
-
- SecP256R1FieldElement Y3 = new SecP256R1FieldElement(S);
- SecP256R1Field.subtract(S, X3.x, Y3.x);
- SecP256R1Field.multiply(Y3.x, M, Y3.x);
- SecP256R1Field.subtract(Y3.x, t1, Y3.x);
-
- SecP256R1FieldElement Z3 = new SecP256R1FieldElement(M);
- SecP256R1Field.twice(Y1.x, Z3.x);
- if (!Z1IsOne)
- {
- SecP256R1Field.multiply(Z3.x, Z1.x, Z3.x);
- }
-
- return new SecP256R1Point(curve, X3, Y3, new ECFieldElement[]{ Z3 }, this.withCompression);
- }
-
- public ECPoint twicePlus(ECPoint b)
- {
- if (this == b)
- {
- return threeTimes();
- }
- if (this.isInfinity())
- {
- return b;
- }
- if (b.isInfinity())
- {
- return twice();
- }
-
- ECFieldElement Y1 = this.y;
- if (Y1.isZero())
- {
- return b;
- }
-
- return twice().add(b);
- }
-
- public ECPoint threeTimes()
- {
- if (this.isInfinity() || this.y.isZero())
- {
- return this;
- }
-
- // NOTE: Be careful about recursions between twicePlus and threeTimes
- return twice().add(this);
- }
-
- public ECPoint negate()
- {
- if (this.isInfinity())
- {
- return this;
- }
-
- return new SecP256R1Point(curve, this.x, this.y.negate(), this.zs, this.withCompression);
- }
-}
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