diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecP256R1Point.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecP256R1Point.cs | 46 |
1 files changed, 24 insertions, 22 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecP256R1Point.cs b/crypto/src/math/ec/custom/sec/SecP256R1Point.cs index 83320824d..d487aad87 100644 --- a/crypto/src/math/ec/custom/sec/SecP256R1Point.cs +++ b/crypto/src/math/ec/custom/sec/SecP256R1Point.cs @@ -74,6 +74,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec SecP256R1FieldElement Z2 = (SecP256R1FieldElement)b.RawZCoords[0]; uint c; + uint[] tt0 = Nat256.CreateExt(); uint[] tt1 = Nat256.CreateExt(); uint[] t2 = Nat256.Create(); uint[] t3 = Nat256.Create(); @@ -89,13 +90,13 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec else { S2 = t3; - SecP256R1Field.Square(Z1.x, S2); + SecP256R1Field.Square(Z1.x, S2, tt0); U2 = t2; - SecP256R1Field.Multiply(S2, X2.x, U2); + SecP256R1Field.Multiply(S2, X2.x, U2, tt0); - SecP256R1Field.Multiply(S2, Z1.x, S2); - SecP256R1Field.Multiply(S2, Y2.x, S2); + SecP256R1Field.Multiply(S2, Z1.x, S2, tt0); + SecP256R1Field.Multiply(S2, Y2.x, S2, tt0); } bool Z2IsOne = Z2.IsOne; @@ -108,13 +109,13 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec else { S1 = t4; - SecP256R1Field.Square(Z2.x, S1); + SecP256R1Field.Square(Z2.x, S1, tt0); U1 = tt1; - SecP256R1Field.Multiply(S1, X1.x, U1); + SecP256R1Field.Multiply(S1, X1.x, U1, tt0); - SecP256R1Field.Multiply(S1, Z2.x, S1); - SecP256R1Field.Multiply(S1, Y1.x, S1); + SecP256R1Field.Multiply(S1, Z2.x, S1, tt0); + SecP256R1Field.Multiply(S1, Y1.x, S1, tt0); } uint[] H = Nat256.Create(); @@ -137,13 +138,13 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec } uint[] HSquared = t3; - SecP256R1Field.Square(H, HSquared); + SecP256R1Field.Square(H, HSquared, tt0); uint[] G = Nat256.Create(); - SecP256R1Field.Multiply(HSquared, H, G); + SecP256R1Field.Multiply(HSquared, H, G, tt0); uint[] V = t3; - SecP256R1Field.Multiply(HSquared, U1, V); + SecP256R1Field.Multiply(HSquared, U1, V, tt0); SecP256R1Field.Negate(G, G); Nat256.Mul(S1, G, tt1); @@ -152,7 +153,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec SecP256R1Field.Reduce32(c, G); SecP256R1FieldElement X3 = new SecP256R1FieldElement(t4); - SecP256R1Field.Square(R, X3.x); + SecP256R1Field.Square(R, X3.x, tt0); SecP256R1Field.Subtract(X3.x, G, X3.x); SecP256R1FieldElement Y3 = new SecP256R1FieldElement(G); @@ -163,11 +164,11 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec SecP256R1FieldElement Z3 = new SecP256R1FieldElement(H); if (!Z1IsOne) { - SecP256R1Field.Multiply(Z3.x, Z1.x, Z3.x); + SecP256R1Field.Multiply(Z3.x, Z1.x, Z3.x, tt0); } if (!Z2IsOne) { - SecP256R1Field.Multiply(Z3.x, Z2.x, Z3.x); + SecP256R1Field.Multiply(Z3.x, Z2.x, Z3.x, tt0); } ECFieldElement[] zs = new ECFieldElement[]{ Z3 }; @@ -189,14 +190,15 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec SecP256R1FieldElement X1 = (SecP256R1FieldElement)this.RawXCoord, Z1 = (SecP256R1FieldElement)this.RawZCoords[0]; uint c; + uint[] tt0 = Nat256.CreateExt(); uint[] t1 = Nat256.Create(); uint[] t2 = Nat256.Create(); uint[] Y1Squared = Nat256.Create(); - SecP256R1Field.Square(Y1.x, Y1Squared); + SecP256R1Field.Square(Y1.x, Y1Squared, tt0); uint[] T = Nat256.Create(); - SecP256R1Field.Square(Y1Squared, T); + SecP256R1Field.Square(Y1Squared, T, tt0); bool Z1IsOne = Z1.IsOne; @@ -204,19 +206,19 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec if (!Z1IsOne) { Z1Squared = t2; - SecP256R1Field.Square(Z1.x, Z1Squared); + SecP256R1Field.Square(Z1.x, Z1Squared, tt0); } SecP256R1Field.Subtract(X1.x, Z1Squared, t1); uint[] M = t2; SecP256R1Field.Add(X1.x, Z1Squared, M); - SecP256R1Field.Multiply(M, t1, M); + SecP256R1Field.Multiply(M, t1, M, tt0); c = Nat256.AddBothTo(M, M, M); SecP256R1Field.Reduce32(c, M); uint[] S = Y1Squared; - SecP256R1Field.Multiply(Y1Squared, X1.x, S); + SecP256R1Field.Multiply(Y1Squared, X1.x, S, tt0); c = Nat.ShiftUpBits(8, S, 2, 0); SecP256R1Field.Reduce32(c, S); @@ -224,20 +226,20 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec SecP256R1Field.Reduce32(c, t1); SecP256R1FieldElement X3 = new SecP256R1FieldElement(T); - SecP256R1Field.Square(M, X3.x); + SecP256R1Field.Square(M, X3.x, tt0); 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.Multiply(Y3.x, M, Y3.x, tt0); 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); + SecP256R1Field.Multiply(Z3.x, Z1.x, Z3.x, tt0); } return new SecP256R1Point(curve, X3, Y3, new ECFieldElement[]{ Z3 }, IsCompressed); |