diff options
Diffstat (limited to 'crypto/src/math/ec/custom/sec/Nat224.cs')
| -rw-r--r-- | crypto/src/math/ec/custom/sec/Nat224.cs | 85 |
1 files changed, 69 insertions, 16 deletions
diff --git a/crypto/src/math/ec/custom/sec/Nat224.cs b/crypto/src/math/ec/custom/sec/Nat224.cs index abc55b3e7..9ea85cba2 100644 --- a/crypto/src/math/ec/custom/sec/Nat224.cs +++ b/crypto/src/math/ec/custom/sec/Nat224.cs @@ -143,6 +143,33 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return (uint)c; } + public static uint AddTo(uint[] x, uint[] z) + { + ulong c = 0; + c += (ulong)x[0] + z[0]; + z[0] = (uint)c; + c >>= 32; + c += (ulong)x[1] + z[1]; + z[1] = (uint)c; + c >>= 32; + c += (ulong)x[2] + z[2]; + z[2] = (uint)c; + c >>= 32; + c += (ulong)x[3] + z[3]; + z[3] = (uint)c; + c >>= 32; + c += (ulong)x[4] + z[4]; + z[4] = (uint)c; + c >>= 32; + c += (ulong)x[5] + z[5]; + z[5] = (uint)c; + c >>= 32; + c += (ulong)x[6] + z[6]; + z[6] = (uint)c; + c >>= 32; + return (uint)c; + } + public static uint AddTo(uint[] x, int xOff, uint[] z, int zOff, uint cIn) { ulong c = cIn; @@ -1247,30 +1274,56 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec return (int)c; } - public static int SubFromExt(uint[] x, int xOff, uint[] zz, int zzOff) + public static int SubFrom(uint[] x, uint[] z) { - Debug.Assert(zzOff <= 7); long c = 0; - c += (long)zz[zzOff + 0] - x[xOff + 0]; - zz[zzOff + 0] = (uint)c; + c += (long)z[0] - x[0]; + z[0] = (uint)c; + c >>= 32; + c += (long)z[1] - x[1]; + z[1] = (uint)c; c >>= 32; - c += (long)zz[zzOff + 1] - x[xOff + 1]; - zz[zzOff + 1] = (uint)c; + c += (long)z[2] - x[2]; + z[2] = (uint)c; + c >>= 32; + c += (long)z[3] - x[3]; + z[3] = (uint)c; c >>= 32; - c += (long)zz[zzOff + 2] - x[xOff + 2]; - zz[zzOff + 2] = (uint)c; + c += (long)z[4] - x[4]; + z[4] = (uint)c; c >>= 32; - c += (long)zz[zzOff + 3] - x[xOff + 3]; - zz[zzOff + 3] = (uint)c; + c += (long)z[5] - x[5]; + z[5] = (uint)c; c >>= 32; - c += (long)zz[zzOff + 4] - x[xOff + 4]; - zz[zzOff + 4] = (uint)c; + c += (long)z[6] - x[6]; + z[6] = (uint)c; c >>= 32; - c += (long)zz[zzOff + 5] - x[xOff + 5]; - zz[zzOff + 5] = (uint)c; + return (int)c; + } + + public static int SubFrom(uint[] x, int xOff, uint[] z, int zOff) + { + long c = 0; + c += (long)z[zOff + 0] - x[xOff + 0]; + z[zOff + 0] = (uint)c; c >>= 32; - c += (long)zz[zzOff + 6] - x[xOff + 6]; - zz[zzOff + 6] = (uint)c; + c += (long)z[zOff + 1] - x[xOff + 1]; + z[zOff + 1] = (uint)c; + c >>= 32; + c += (long)z[zOff + 2] - x[xOff + 2]; + z[zOff + 2] = (uint)c; + c >>= 32; + c += (long)z[zOff + 3] - x[xOff + 3]; + z[zOff + 3] = (uint)c; + c >>= 32; + c += (long)z[zOff + 4] - x[xOff + 4]; + z[zOff + 4] = (uint)c; + c >>= 32; + c += (long)z[zOff + 5] - x[xOff + 5]; + z[zOff + 5] = (uint)c; + c >>= 32; + c += (long)z[zOff + 6] - x[xOff + 6]; + z[zOff + 6] = (uint)c; c >>= 32; return (int)c; } |