diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecT193Field.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecT193Field.cs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecT193Field.cs b/crypto/src/math/ec/custom/sec/SecT193Field.cs index 5154f1e0a..41acb4f94 100644 --- a/crypto/src/math/ec/custom/sec/SecT193Field.cs +++ b/crypto/src/math/ec/custom/sec/SecT193Field.cs @@ -132,6 +132,23 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec z[zOff + 3] = z3 & M01; } + public static void Sqrt(ulong[] x, ulong[] z) + { + ulong u0, u1; + u0 = Interleave.Unshuffle(x[0]); u1 = Interleave.Unshuffle(x[1]); + ulong e0 = (u0 & 0x00000000FFFFFFFFUL) | (u1 << 32); + ulong c0 = (u0 >> 32) | (u1 & 0xFFFFFFFF00000000UL); + + u0 = Interleave.Unshuffle(x[2]); + ulong e1 = (u0 & 0x00000000FFFFFFFFUL) ^ (x[3] << 32); + ulong c1 = (u0 >> 32); + + z[0] = e0 ^ (c0 << 8); + z[1] = e1 ^ (c1 << 8) ^ (c0 >> 56) ^ (c0 << 33); + z[2] = (c1 >> 56) ^ (c1 << 33) ^ (c0 >> 31); + z[3] = (c1 >> 31); + } + public static void Square(ulong[] x, ulong[] z) { ulong[] tt = Nat256.CreateExt64(); @@ -161,6 +178,12 @@ 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 ImplCompactExt(ulong[] zz) { ulong z0 = zz[0], z1 = zz[1], z2 = zz[2], z3 = zz[3], z4 = zz[4], z5 = zz[5], z6 = zz[6], z7 = zz[7]; |