- Initial commit

Runtime/3rdParty/BouncyCastle/crypto/parameters/X448PrivateKeyParameters.cs

@@ -0,0 +1,118 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+using System.IO;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.EC.Rfc7748;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Security;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities.IO;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters
+{
+    public sealed class X448PrivateKeyParameters
+        : AsymmetricKeyParameter
+    {
+        public static readonly int KeySize = X448.ScalarSize;
+        public static readonly int SecretSize = X448.PointSize;
+
+        private readonly byte[] data = new byte[KeySize];
+
+        public X448PrivateKeyParameters(SecureRandom random)
+            : base(true)
+        {
+            X448.GeneratePrivateKey(random, data);
+        }
+
+        public X448PrivateKeyParameters(byte[] buf)
+            : this(Validate(buf), 0)
+        {
+        }
+
+        public X448PrivateKeyParameters(byte[] buf, int off)
+            : base(true)
+        {
+            Array.Copy(buf, off, data, 0, KeySize);
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public X448PrivateKeyParameters(ReadOnlySpan<byte> buf)
+            : base(true)
+        {
+            if (buf.Length != KeySize)
+                throw new ArgumentException("must have length " + KeySize, nameof(buf));
+
+            buf.CopyTo(data);
+        }
+#endif
+
+        public X448PrivateKeyParameters(Stream input)
+            : base(true)
+        {
+            if (KeySize != Streams.ReadFully(input, data))
+                throw new EndOfStreamException("EOF encountered in middle of X448 private key");
+        }
+
+        public void Encode(byte[] buf, int off)
+        {
+            Array.Copy(data, 0, buf, off, KeySize);
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public void Encode(Span<byte> buf)
+        {
+            data.CopyTo(buf);
+        }
+#endif
+
+        public byte[] GetEncoded()
+        {
+            return Arrays.Clone(data);
+        }
+
+        public X448PublicKeyParameters GeneratePublicKey()
+        {
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+            Span<byte> publicKey = stackalloc byte[X448.PointSize];
+            X448.GeneratePublicKey(data, publicKey);
+            return new X448PublicKeyParameters(publicKey);
+#else
+            byte[] publicKey = new byte[X448.PointSize];
+            X448.GeneratePublicKey(data, 0, publicKey, 0);
+            return new X448PublicKeyParameters(publicKey, 0);
+#endif
+        }
+
+        public void GenerateSecret(X448PublicKeyParameters publicKey, byte[] buf, int off)
+        {
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+            GenerateSecret(publicKey, buf.AsSpan(off));
+#else
+            byte[] encoded = new byte[X448.PointSize];
+            publicKey.Encode(encoded, 0);
+            if (!X448.CalculateAgreement(data, 0, encoded, 0, buf, off))
+                throw new InvalidOperationException("X448 agreement failed");
+#endif
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public void GenerateSecret(X448PublicKeyParameters publicKey, Span<byte> buf)
+        {
+            Span<byte> encoded = stackalloc byte[X448.PointSize];
+            publicKey.Encode(encoded);
+            if (!X448.CalculateAgreement(data, encoded, buf))
+                throw new InvalidOperationException("X448 agreement failed");
+        }
+#endif
+
+        private static byte[] Validate(byte[] buf)
+        {
+            if (buf.Length != KeySize)
+                throw new ArgumentException("must have length " + KeySize, nameof(buf));
+
+            return buf;
+        }
+    }
+}
+#pragma warning restore
+#endif