diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecT571Field.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecT571Field.cs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecT571Field.cs b/crypto/src/math/ec/custom/sec/SecT571Field.cs index 5a91985bc..0d9b337fc 100644 --- a/crypto/src/math/ec/custom/sec/SecT571Field.cs +++ b/crypto/src/math/ec/custom/sec/SecT571Field.cs @@ -55,11 +55,34 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec } } + private static void AddTo(ulong[] x, ulong[] z) + { + for (int i = 0; i < 9; ++i) + { + z[i] ^= x[i]; + } + } + public static ulong[] FromBigInteger(BigInteger x) { return Nat.FromBigInteger64(571, x); } + public static void HalfTrace(ulong[] x, ulong[] z) + { + ulong[] tt = Nat576.CreateExt64(); + + Nat576.Copy64(x, z); + for (int i = 1; i < 571; 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 (Nat576.IsZero64(x)) |