diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecT131Field.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecT131Field.cs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecT131Field.cs b/crypto/src/math/ec/custom/sec/SecT131Field.cs index 248b1969e..db703d9e0 100644 --- a/crypto/src/math/ec/custom/sec/SecT131Field.cs +++ b/crypto/src/math/ec/custom/sec/SecT131Field.cs @@ -35,11 +35,33 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec z[2] = x[2]; } + private static void AddTo(ulong[] x, ulong[] z) + { + z[0] ^= x[0]; + z[1] ^= x[1]; + z[2] ^= x[2]; + } + public static ulong[] FromBigInteger(BigInteger x) { return Nat.FromBigInteger64(131, x); } + public static void HalfTrace(ulong[] x, ulong[] z) + { + ulong[] tt = Nat.Create64(5); + + Nat192.Copy64(x, z); + for (int i = 1; i < 131; i += 2) + { + ImplSquare(z, tt); + Reduce(tt, z); + ImplSquare(z, tt); + Reduce(tt, z); + AddTo(x, z); + } + } + public static void Invert(ulong[] x, ulong[] z) { if (Nat192.IsZero64(x)) |