diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecP521R1Point.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecP521R1Point.cs | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecP521R1Point.cs b/crypto/src/math/ec/custom/sec/SecP521R1Point.cs index 5da71f078..2e3a7eccb 100644 --- a/crypto/src/math/ec/custom/sec/SecP521R1Point.cs +++ b/crypto/src/math/ec/custom/sec/SecP521R1Point.cs @@ -216,12 +216,11 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec uint[] S = Y1Squared; SecP521R1Field.Multiply(Y1Squared, X1.x, S); - SecP521R1Field.Twice(S, S); - SecP521R1Field.Twice(S, S); + Nat.ShiftUpBits(17, S, 2, 0); + SecP521R1Field.Reduce23(S); - SecP521R1Field.Twice(T, t1); - SecP521R1Field.Twice(t1, t1); - SecP521R1Field.Twice(t1, t1); + Nat.ShiftUpBits(17, T, 3, 0, t1); + SecP521R1Field.Reduce23(t1); SecP521R1FieldElement X3 = new SecP521R1FieldElement(T); SecP521R1Field.Square(M, X3.x); |