1 files changed, 16 insertions, 0 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecT113Field.cs b/crypto/src/math/ec/custom/sec/SecT113Field.cs
index 640c6e787..49773b66d 100644
--- a/crypto/src/math/ec/custom/sec/SecT113Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecT113Field.cs
@@ -102,6 +102,16 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
z[zOff + 1] = z1 & M49;
}
+ public static void Sqrt(ulong[] x, ulong[] z)
+ {
+ ulong u0 = Interleave.Unshuffle(x[0]), u1 = Interleave.Unshuffle(x[1]);
+ ulong e0 = (u0 & 0x00000000FFFFFFFFUL) | (u1 << 32);
+ ulong c0 = (u0 >> 32) | (u1 & 0xFFFFFFFF00000000UL);
+
+ z[0] = e0 ^ (c0 << 57) ^ (c0 << 5);
+ z[1] = (c0 >> 7) ^ (c0 >> 59);
+ }
+
public static void Square(ulong[] x, ulong[] z)
{
ulong[] tt = Nat128.CreateExt64();
@@ -131,6 +141,12 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
}
}
+ public static uint Trace(ulong[] x)
+ {
+ // Non-zero-trace bits: 0
+ return (uint)(x[0]) & 1U;
+ }
+
protected static void ImplMultiply(ulong[] x, ulong[] y, ulong[] zz)
{
/*
|
