diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/SecT283Field.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/SecT283Field.cs | 38 |
1 files changed, 18 insertions, 20 deletions
diff --git a/crypto/src/math/ec/custom/sec/SecT283Field.cs b/crypto/src/math/ec/custom/sec/SecT283Field.cs index 4e2cee0f8..61a1c9afd 100644 --- a/crypto/src/math/ec/custom/sec/SecT283Field.cs +++ b/crypto/src/math/ec/custom/sec/SecT283Field.cs @@ -10,7 +10,8 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec private const ulong M27 = ulong.MaxValue >> 37; private const ulong M57 = ulong.MaxValue >> 7; - private static readonly ulong[] ROOT_Z = new ulong[]{ 0x0C30C30C30C30808UL, 0x30C30C30C30C30C3UL, 0x820820820820830CUL, 0x0820820820820820UL, 0x2082082UL }; + private static readonly ulong[] ROOT_Z = new ulong[]{ 0x0C30C30C30C30808UL, 0x30C30C30C30C30C3UL, + 0x820820820820830CUL, 0x0820820820820820UL, 0x2082082UL }; public static void Add(ulong[] x, ulong[] y, ulong[] z) { @@ -263,32 +264,33 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec ImplExpand(x, a); ImplExpand(y, b); + ulong[] u = zz; ulong[] p = new ulong[26]; - ImplMulw(a[0], b[0], p, 0); // m1 - ImplMulw(a[1], b[1], p, 2); // m2 - ImplMulw(a[2], b[2], p, 4); // m3 - ImplMulw(a[3], b[3], p, 6); // m4 - ImplMulw(a[4], b[4], p, 8); // m5 + ImplMulw(u, a[0], b[0], p, 0); // m1 + ImplMulw(u, a[1], b[1], p, 2); // m2 + ImplMulw(u, a[2], b[2], p, 4); // m3 + ImplMulw(u, a[3], b[3], p, 6); // m4 + ImplMulw(u, a[4], b[4], p, 8); // m5 ulong u0 = a[0] ^ a[1], v0 = b[0] ^ b[1]; ulong u1 = a[0] ^ a[2], v1 = b[0] ^ b[2]; ulong u2 = a[2] ^ a[4], v2 = b[2] ^ b[4]; ulong u3 = a[3] ^ a[4], v3 = b[3] ^ b[4]; - ImplMulw(u1 ^ a[3], v1 ^ b[3], p, 18); // m10 - ImplMulw(u2 ^ a[1], v2 ^ b[1], p, 20); // m11 + ImplMulw(u, u1 ^ a[3], v1 ^ b[3], p, 18); // m10 + ImplMulw(u, u2 ^ a[1], v2 ^ b[1], p, 20); // m11 ulong A4 = u0 ^ u3 , B4 = v0 ^ v3; ulong A5 = A4 ^ a[2], B5 = B4 ^ b[2]; - ImplMulw(A4, B4, p, 22); // m12 - ImplMulw(A5, B5, p, 24); // m13 + ImplMulw(u, A4, B4, p, 22); // m12 + ImplMulw(u, A5, B5, p, 24); // m13 - ImplMulw(u0, v0, p, 10); // m6 - ImplMulw(u1, v1, p, 12); // m7 - ImplMulw(u2, v2, p, 14); // m8 - ImplMulw(u3, v3, p, 16); // m9 + ImplMulw(u, u0, v0, p, 10); // m6 + ImplMulw(u, u1, v1, p, 12); // m7 + ImplMulw(u, u2, v2, p, 14); // m8 + ImplMulw(u, u3, v3, p, 16); // m9 // Original method, corresponding to formula (16) @@ -375,12 +377,11 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec ImplCompactExt(zz); } - protected static void ImplMulw(ulong x, ulong y, ulong[] z, int zOff) + protected static void ImplMulw(ulong[] u, ulong x, ulong y, ulong[] z, int zOff) { Debug.Assert(x >> 57 == 0); Debug.Assert(y >> 57 == 0); - ulong[] u = new ulong[8]; //u[0] = 0; u[1] = y; u[2] = u[1] << 1; @@ -414,10 +415,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec protected static void ImplSquare(ulong[] x, ulong[] zz) { - Interleave.Expand64To128(x[0], zz, 0); - Interleave.Expand64To128(x[1], zz, 2); - Interleave.Expand64To128(x[2], zz, 4); - Interleave.Expand64To128(x[3], zz, 6); + Interleave.Expand64To128(x, 0, 4, zz, 0); zz[8] = Interleave.Expand32to64((uint)x[4]); } } |