diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/Nat224.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/Nat224.cs | 145 |
1 files changed, 3 insertions, 142 deletions
diff --git a/crypto/src/math/ec/custom/sec/Nat224.cs b/crypto/src/math/ec/custom/sec/Nat224.cs index 7027f1162..f8021b19a 100644 --- a/crypto/src/math/ec/custom/sec/Nat224.cs +++ b/crypto/src/math/ec/custom/sec/Nat224.cs @@ -117,32 +117,6 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return (uint)c; } - // TODO Re-write to allow full range for x? - public static uint AddDWord(ulong x, uint[] z, int zOff) - { - Debug.Assert(zOff <= 5); - ulong c = x; - c += (ulong)z[zOff + 0]; - z[zOff + 0] = (uint)c; - c >>= 32; - c += (ulong)z[zOff + 1]; - z[zOff + 1] = (uint)c; - c >>= 32; - return c == 0 ? 0 : Inc(z, zOff + 2); - } - - public static uint AddExt(uint[] xx, uint[] yy, uint[] zz) - { - ulong c = 0; - for (int i = 0; i < 14; ++i) - { - c += (ulong)xx[i] + yy[i]; - zz[i] = (uint)c; - c >>= 32; - } - return (uint)c; - } - public static uint AddTo(uint[] x, uint[] z) { ulong c = 0; @@ -231,24 +205,6 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return (uint)c; } - public static uint AddWord(uint x, uint[] z, int zOff) - { - Debug.Assert(zOff <= 6); - ulong c = (ulong)x + z[zOff + 0]; - z[zOff + 0] = (uint)c; - c >>= 32; - return c == 0 ? 0 : Inc(z, zOff + 1); - } - - public static uint AddWordExt(uint x, uint[] zz, int zzOff) - { - Debug.Assert(zzOff <= 13); - ulong c = (ulong)x + zz[zzOff + 0]; - zz[zzOff + 0] = (uint)c; - c >>= 32; - return c == 0 ? 0 : IncExt(zz, zzOff + 1); - } - public static void Copy(uint[] x, uint[] z) { z[0] = x[0]; @@ -270,32 +226,6 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return new uint[14]; } - public static int Dec(uint[] z, int zOff) - { - Debug.Assert(zOff <= 7); - for (int i = zOff; i < 7; ++i) - { - if (--z[i] != uint.MaxValue) - { - return 0; - } - } - return -1; - } - - public static int DecExt(uint[] zz, int zzOff) - { - Debug.Assert(zzOff <= 14); - for (int i = zzOff; i < 14; ++i) - { - if (--zz[i] != uint.MaxValue) - { - return 0; - } - } - return -1; - } - public static bool Diff(uint[] x, int xOff, uint[] y, int yOff, uint[] z, int zOff) { bool pos = Gte(x, xOff, y, yOff); @@ -389,32 +319,6 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return true; } - public static uint Inc(uint[] z, int zOff) - { - Debug.Assert(zOff <= 7); - for (int i = zOff; i < 7; ++i) - { - if (++z[i] != uint.MinValue) - { - return 0; - } - } - return 1; - } - - public static uint IncExt(uint[] zz, int zzOff) - { - Debug.Assert(zzOff <= 14); - for (int i = zzOff; i < 14; ++i) - { - if (++zz[i] != uint.MinValue) - { - return 0; - } - } - return 1; - } - public static bool IsOne(uint[] x) { if (x[0] != 1) @@ -806,7 +710,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec c += z[zOff + 3]; z[zOff + 3] = (uint)c; c >>= 32; - return c == 0 ? 0 : Inc(z, zOff + 4); + return c == 0 ? 0 : Nat.IncAt(7, z, zOff, 4); } public static uint Mul33WordAdd(uint x, uint y, uint[] z, int zOff) @@ -823,7 +727,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec c += z[zOff + 2]; z[zOff + 2] = (uint)c; c >>= 32; - return c == 0 ? 0 : Inc(z, zOff + 3); + return c == 0 ? 0 : Nat.IncAt(7, z, zOff, 3); } public static uint MulWordDwordAdd(uint x, ulong y, uint[] z, int zOff) @@ -839,7 +743,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec c += z[zOff + 2]; z[zOff + 2] = (uint)c; c >>= 32; - return c == 0 ? 0 : Inc(z, zOff + 3); + return c == 0 ? 0 : Nat.IncAt(7, z, zOff, 3); } public static uint MulWord(uint x, uint[] y, uint[] z, int zOff) @@ -1167,31 +1071,6 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return (int)c; } - // TODO Re-write to allow full range for x? - public static int SubDWord(ulong x, uint[] z) - { - long c = -(long)x; - c += (long)z[0]; - z[0] = (uint)c; - c >>= 32; - c += (long)z[1]; - z[1] = (uint)c; - c >>= 32; - return c == 0 ? 0 : Dec(z, 2); - } - - public static int SubExt(uint[] xx, uint[] yy, uint[] zz) - { - long c = 0; - for (int i = 0; i < 14; ++i) - { - c += (long)xx[i] - yy[i]; - zz[i] = (uint)c; - c >>= 32; - } - return (int)c; - } - public static int SubFrom(uint[] x, uint[] z) { long c = 0; @@ -1246,24 +1125,6 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return (int)c; } - public static int SubWord(uint x, uint[] z, int zOff) - { - Debug.Assert(zOff <= 6); - long c = (long)z[zOff + 0] - x; - z[zOff + 0] = (uint)c; - c >>= 32; - return c == 0 ? 0 : Dec(z, zOff + 1); - } - - public static int SubWordExt(uint x, uint[] zz, int zzOff) - { - Debug.Assert(zzOff <= 13); - long c = (long)zz[zzOff + 0] - x; - zz[zzOff + 0] = (uint)c; - c >>= 32; - return c == 0 ? 0 : DecExt(zz, zzOff + 1); - } - public static BigInteger ToBigInteger(uint[] x) { byte[] bs = new byte[28]; |