diff options
Diffstat (limited to 'crypto/src/math/raw/Nat.cs')
| -rw-r--r-- | crypto/src/math/raw/Nat.cs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/crypto/src/math/raw/Nat.cs b/crypto/src/math/raw/Nat.cs index d748e04c5..0f53b1a8b 100644 --- a/crypto/src/math/raw/Nat.cs +++ b/crypto/src/math/raw/Nat.cs @@ -400,6 +400,36 @@ namespace Org.BouncyCastle.Math.Raw } #endif + public static uint CAddTo(int len, int mask, uint[] x, uint[] z) + { + uint MASK = (uint)-(mask & 1); + + ulong c = 0; + for (int i = 0; i < len; ++i) + { + c += (ulong)z[i] + (x[i] & MASK); + z[i] = (uint)c; + c >>= 32; + } + return (uint)c; + } + +#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER + public static uint CAddTo(int len, int mask, ReadOnlySpan<uint> x, Span<uint> z) + { + uint MASK = (uint)-(mask & 1); + + ulong c = 0; + for (int i = 0; i < len; ++i) + { + c += (ulong)z[i] + (x[i] & MASK); + z[i] = (uint)c; + c >>= 32; + } + return (uint)c; + } +#endif + public static void CMov(int len, int mask, uint[] x, int xOff, uint[] z, int zOff) { uint MASK = (uint)-(mask & 1); |