diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecT233R1Point.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecT233R1Point.cs | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecT233R1Point.cs b/crypto/src/math/ec/custom/sec/SecT233R1Point.cs index 44441b22a..c3a51a8bb 100644 --- a/crypto/src/math/ec/custom/sec/SecT233R1Point.cs +++ b/crypto/src/math/ec/custom/sec/SecT233R1Point.cs @@ -177,7 +177,11 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec SecT233FieldElement L1 = (SecT233FieldElement)this.RawYCoord, Z1 = (SecT233FieldElement)this.RawZCoords[0]; +#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER + Span<ulong> tt0 = stackalloc ulong[8]; +#else ulong[] tt0 = Nat256.CreateExt64(); +#endif ulong[] _X3 = Nat256.Create64(); ulong[] _L3 = Nat256.Create64(); ulong[] _Z3 = Nat256.Create64(); @@ -198,24 +202,28 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec } else { +#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER + Span<ulong> t1 = stackalloc ulong[4]; +#else ulong[] t1 = Nat256.Create64(); - ulong[] t2 = Nat256.Create64(); +#endif SecT233Field.Multiply(L1.x, Z1.x, t1); // L1Z1 SecT233Field.Square(Z1.x, tt0); // Z1Sq - SecT233Field.Square(L1.x, t2); - SecT233Field.AddBothTo(t1, tt0, t2); // T + SecT233Field.Square(L1.x, _X3); + SecT233Field.AddBothTo(t1, tt0, _X3); // T - if (Nat256.IsZero64(t2)) - return new SecT233R1Point(curve, new SecT233FieldElement(t2), curve.B.Sqrt()); + if (Nat256.IsZero64(_X3)) + return new SecT233R1Point(curve, new SecT233FieldElement(_X3), curve.B.Sqrt()); - SecT233Field.Square(t2, _X3); - SecT233Field.Multiply(t2, tt0, _Z3); + SecT233Field.Multiply(_X3, tt0, _Z3); SecT233Field.Multiply(X1.x, Z1.x, tt0); // X1Z1 SecT233Field.SquareExt(tt0, tt0); - SecT233Field.MultiplyAddToExt(t2, t1, tt0); + SecT233Field.MultiplyAddToExt(_X3, t1, tt0); + + SecT233Field.Square(_X3, _X3); } SecT233Field.Reduce(tt0, _L3); |