diff --git a/crypto/src/crypto/digests/Haraka256Digest.cs b/crypto/src/crypto/digests/Haraka256Digest.cs
index 2507125b2..efbaa81e2 100644
--- a/crypto/src/crypto/digests/Haraka256Digest.cs
+++ b/crypto/src/crypto/digests/Haraka256Digest.cs
@@ -74,6 +74,15 @@ namespace Org.BouncyCastle.Crypto.Digests
if (output.Length < 32)
throw new ArgumentException("output too short to receive digest");
+#if NETCOREAPP3_0_OR_GREATER
+ if (Haraka256_X86.IsSupported)
+ {
+ Haraka256_X86.Hash(m_buf, output);
+ Reset();
+ return 32;
+ }
+#endif
+
int rv = Haraka256256(m_buf, output);
Reset();
diff --git a/crypto/src/crypto/digests/Haraka256_X86.cs b/crypto/src/crypto/digests/Haraka256_X86.cs
new file mode 100644
index 000000000..aa9b4555f
--- /dev/null
+++ b/crypto/src/crypto/digests/Haraka256_X86.cs
@@ -0,0 +1,128 @@
+#if NETCOREAPP3_0_OR_GREATER
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics;
+
+namespace Org.BouncyCastle.Crypto.Digests
+{
+ using Aes = System.Runtime.Intrinsics.X86.Aes;
+ using Sse2 = System.Runtime.Intrinsics.X86.Sse2;
+
+ public static class Haraka256_X86
+ {
+ public static bool IsSupported => Aes.IsSupported;
+
+ // Haraka round constants
+ private static readonly Vector128<byte>[] DefaultRoundConstants = new Vector128<byte>[]
+ {
+ Vector128.Create(0x9D, 0x7B, 0x81, 0x75, 0xF0, 0xFE, 0xC5, 0xB2, 0x0A, 0xC0, 0x20, 0xE6, 0x4C, 0x70, 0x84, 0x06),
+ Vector128.Create(0x17, 0xF7, 0x08, 0x2F, 0xA4, 0x6B, 0x0F, 0x64, 0x6B, 0xA0, 0xF3, 0x88, 0xE1, 0xB4, 0x66, 0x8B),
+ Vector128.Create(0x14, 0x91, 0x02, 0x9F, 0x60, 0x9D, 0x02, 0xCF, 0x98, 0x84, 0xF2, 0x53, 0x2D, 0xDE, 0x02, 0x34),
+ Vector128.Create(0x79, 0x4F, 0x5B, 0xFD, 0xAF, 0xBC, 0xF3, 0xBB, 0x08, 0x4F, 0x7B, 0x2E, 0xE6, 0xEA, 0xD6, 0x0E),
+ Vector128.Create(0x44, 0x70, 0x39, 0xBE, 0x1C, 0xCD, 0xEE, 0x79, 0x8B, 0x44, 0x72, 0x48, 0xCB, 0xB0, 0xCF, 0xCB),
+ Vector128.Create(0x7B, 0x05, 0x8A, 0x2B, 0xED, 0x35, 0x53, 0x8D, 0xB7, 0x32, 0x90, 0x6E, 0xEE, 0xCD, 0xEA, 0x7E),
+ Vector128.Create(0x1B, 0xEF, 0x4F, 0xDA, 0x61, 0x27, 0x41, 0xE2, 0xD0, 0x7C, 0x2E, 0x5E, 0x43, 0x8F, 0xC2, 0x67),
+ Vector128.Create(0x3B, 0x0B, 0xC7, 0x1F, 0xE2, 0xFD, 0x5F, 0x67, 0x07, 0xCC, 0xCA, 0xAF, 0xB0, 0xD9, 0x24, 0x29),
+ Vector128.Create(0xEE, 0x65, 0xD4, 0xB9, 0xCA, 0x8F, 0xDB, 0xEC, 0xE9, 0x7F, 0x86, 0xE6, 0xF1, 0x63, 0x4D, 0xAB),
+ Vector128.Create(0x33, 0x7E, 0x03, 0xAD, 0x4F, 0x40, 0x2A, 0x5B, 0x64, 0xCD, 0xB7, 0xD4, 0x84, 0xBF, 0x30, 0x1C),
+ Vector128.Create(0x00, 0x98, 0xF6, 0x8D, 0x2E, 0x8B, 0x02, 0x69, 0xBF, 0x23, 0x17, 0x94, 0xB9, 0x0B, 0xCC, 0xB2),
+ Vector128.Create(0x8A, 0x2D, 0x9D, 0x5C, 0xC8, 0x9E, 0xAA, 0x4A, 0x72, 0x55, 0x6F, 0xDE, 0xA6, 0x78, 0x04, 0xFA),
+ Vector128.Create(0xD4, 0x9F, 0x12, 0x29, 0x2E, 0x4F, 0xFA, 0x0E, 0x12, 0x2A, 0x77, 0x6B, 0x2B, 0x9F, 0xB4, 0xDF),
+ Vector128.Create(0xEE, 0x12, 0x6A, 0xBB, 0xAE, 0x11, 0xD6, 0x32, 0x36, 0xA2, 0x49, 0xF4, 0x44, 0x03, 0xA1, 0x1E),
+ Vector128.Create(0xA6, 0xEC, 0xA8, 0x9C, 0xC9, 0x00, 0x96, 0x5F, 0x84, 0x00, 0x05, 0x4B, 0x88, 0x49, 0x04, 0xAF),
+ Vector128.Create(0xEC, 0x93, 0xE5, 0x27, 0xE3, 0xC7, 0xA2, 0x78, 0x4F, 0x9C, 0x19, 0x9D, 0xD8, 0x5E, 0x02, 0x21),
+ Vector128.Create(0x73, 0x01, 0xD4, 0x82, 0xCD, 0x2E, 0x28, 0xB9, 0xB7, 0xC9, 0x59, 0xA7, 0xF8, 0xAA, 0x3A, 0xBF),
+ Vector128.Create(0x6B, 0x7D, 0x30, 0x10, 0xD9, 0xEF, 0xF2, 0x37, 0x17, 0xB0, 0x86, 0x61, 0x0D, 0x70, 0x60, 0x62),
+ Vector128.Create(0xC6, 0x9A, 0xFC, 0xF6, 0x53, 0x91, 0xC2, 0x81, 0x43, 0x04, 0x30, 0x21, 0xC2, 0x45, 0xCA, 0x5A),
+ Vector128.Create(0x3A, 0x94, 0xD1, 0x36, 0xE8, 0x92, 0xAF, 0x2C, 0xBB, 0x68, 0x6B, 0x22, 0x3C, 0x97, 0x23, 0x92),
+ };
+
+ public static void Hash(ReadOnlySpan<byte> input, Span<byte> output)
+ {
+ if (!IsSupported)
+ throw new PlatformNotSupportedException(nameof(Haraka256_X86));
+
+ var m1 = Load128(input[ ..16]);
+ var m2 = Load128(input[16..32]);
+
+ var s1 = m1;
+ var s2 = m2;
+
+ ImplPermute(ref s1, ref s2, DefaultRoundConstants);
+
+ s1 = Sse2.Xor(s1, m1);
+ s2 = Sse2.Xor(s2, m2);
+
+ Store128(ref s1, output[ ..16]);
+ Store128(ref s2, output[16..32]);
+ }
+
+ public static void Permute(ReadOnlySpan<byte> input, Span<byte> output)
+ {
+ if (!IsSupported)
+ throw new PlatformNotSupportedException(nameof(Haraka256_X86));
+
+ var s1 = Load128(input[ ..16]);
+ var s2 = Load128(input[16..32]);
+
+ ImplPermute(ref s1, ref s2, DefaultRoundConstants);
+
+ Store128(ref s1, output[ ..16]);
+ Store128(ref s2, output[16..32]);
+ }
+
+ [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+ private static void ImplPermute(ref Vector128<byte> s1, ref Vector128<byte> s2,
+ Span<Vector128<byte>> rc)
+ {
+ int k = 0;
+ for (int round = 0; round < 5; ++round)
+ {
+ s1 = Aes.Encrypt(s1, rc[k++]);
+ s2 = Aes.Encrypt(s2, rc[k++]);
+
+ s1 = Aes.Encrypt(s1, rc[k++]);
+ s2 = Aes.Encrypt(s2, rc[k++]);
+
+ var t1 = s1.AsUInt32();
+ var t2 = s2.AsUInt32();
+
+ s1 = Sse2.UnpackLow(t1, t2).AsByte();
+ s2 = Sse2.UnpackHigh(t1, t2).AsByte();
+ }
+ }
+
+ [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+ private static Vector128<byte> Load128(ReadOnlySpan<byte> t)
+ {
+#if NET7_0_OR_GREATER
+ return Vector128.Create<byte>(t);
+#else
+ if (BitConverter.IsLittleEndian && Unsafe.SizeOf<Vector128<byte>>() == 16)
+ return Unsafe.ReadUnaligned<Vector128<byte>>(ref Unsafe.AsRef(t[0]));
+
+ return Vector128.Create(t[0], t[1], t[2], t[3], t[4], t[5], t[6], t[7], t[8], t[9], t[10], t[11], t[12],
+ t[13], t[14], t[15]);
+#endif
+ }
+
+ [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+ private static void Store128(ref Vector128<byte> s, Span<byte> t)
+ {
+#if NET7_0_OR_GREATER
+ Vector128.CopyTo(s, t);
+#else
+ if (BitConverter.IsLittleEndian && Unsafe.SizeOf<Vector128<byte>>() == 16)
+ {
+ Unsafe.WriteUnaligned(ref t[0], s);
+ return;
+ }
+
+ var u = s.AsUInt64();
+ Utilities.Pack.UInt64_To_LE(u.GetElement(0), t);
+ Utilities.Pack.UInt64_To_LE(u.GetElement(1), t[8..]);
+#endif
+ }
+ }
+}
+#endif
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