diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecP256R1Point.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecP256R1Point.cs | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecP256R1Point.cs b/crypto/src/math/ec/custom/sec/SecP256R1Point.cs index be54e0dda..e25ff5f7a 100644 --- a/crypto/src/math/ec/custom/sec/SecP256R1Point.cs +++ b/crypto/src/math/ec/custom/sec/SecP256R1Point.cs @@ -217,12 +217,11 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec uint[] S = Y1Squared; SecP256R1Field.Multiply(Y1Squared, X1.x, S); - SecP256R1Field.Twice(S, S); - SecP256R1Field.Twice(S, S); + uint c = Nat.ShiftUpBits(8, S, 2, 0); + SecP256R1Field.Reduce32(c, S); - SecP256R1Field.Twice(T, t1); - SecP256R1Field.Twice(t1, t1); - SecP256R1Field.Twice(t1, t1); + c = Nat.ShiftUpBits(8, T, 3, 0, t1); + SecP256R1Field.Reduce32(c, t1); SecP256R1FieldElement X3 = new SecP256R1FieldElement(T); SecP256R1Field.Square(M, X3.x); |