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| author | Peter Dettman <peter.dettman@bouncycastle.org> | 2022-11-11 19:39:10 +0700 |
|---|---|---|
| committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2022-11-11 19:39:10 +0700 |
| commit | 60996edb5ade814718a06c3ff289679aca24fd0c (patch) | |
| tree | 18bba8f717b141fe707df4e2f91475e27da75b04 | |
| parent | Refactoring in Pqc.Crypto.Cmce (diff) | |
| download | BouncyCastle.NET-ed25519-60996edb5ade814718a06c3ff289679aca24fd0c.tar.xz | |
Improve Xor methods
| -rw-r--r-- | crypto/src/util/Bytes.cs | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/crypto/src/util/Bytes.cs b/crypto/src/util/Bytes.cs index e808555f5..d704de6a6 100644 --- a/crypto/src/util/Bytes.cs +++ b/crypto/src/util/Bytes.cs @@ -1,6 +1,7 @@ using System; #if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER using System.Numerics; +using System.Runtime.InteropServices; #endif namespace Org.BouncyCastle.Utilities @@ -50,14 +51,14 @@ namespace Org.BouncyCastle.Utilities } } { - int limit = len - 4; + int limit = len - 8; while (i <= limit) { - z[i + 0] = (byte)(x[i + 0] ^ y[i + 0]); - z[i + 1] = (byte)(x[i + 1] ^ y[i + 1]); - z[i + 2] = (byte)(x[i + 2] ^ y[i + 2]); - z[i + 3] = (byte)(x[i + 3] ^ y[i + 3]); - i += 4; + ulong x64 = MemoryMarshal.Read<ulong>(x[i..]); + ulong y64 = MemoryMarshal.Read<ulong>(y[i..]); + ulong z64 = x64 ^ y64; + MemoryMarshal.Write(z[i..], ref z64); + i += 8; } } { @@ -110,14 +111,14 @@ namespace Org.BouncyCastle.Utilities } } { - int limit = len - 4; + int limit = len - 8; while (i <= limit) { - z[i + 0] ^= x[i + 0]; - z[i + 1] ^= x[i + 1]; - z[i + 2] ^= x[i + 2]; - z[i + 3] ^= x[i + 3]; - i += 4; + ulong x64 = MemoryMarshal.Read<ulong>(x[i..]); + ulong z64 = MemoryMarshal.Read<ulong>(z[i..]); + z64 ^= x64; + MemoryMarshal.Write(z[i..], ref z64); + i += 8; } } { |