- Initial commit

Runtime/3rdParty/BouncyCastle/crypto/parameters/Ed25519PrivateKeyParameters.cs

@@ -0,0 +1,144 @@
+#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.Rfc8032;
+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 Ed25519PrivateKeyParameters
+        : AsymmetricKeyParameter
+    {
+        public static readonly int KeySize = Ed25519.SecretKeySize;
+        public static readonly int SignatureSize = Ed25519.SignatureSize;
+
+        private readonly byte[] data = new byte[KeySize];
+
+        private Ed25519PublicKeyParameters cachedPublicKey;
+
+        public Ed25519PrivateKeyParameters(SecureRandom random)
+            : base(true)
+        {
+            Ed25519.GeneratePrivateKey(random, data);
+        }
+
+        public Ed25519PrivateKeyParameters(byte[] buf)
+            : this(Validate(buf), 0)
+        {
+        }
+
+        public Ed25519PrivateKeyParameters(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 Ed25519PrivateKeyParameters(ReadOnlySpan<byte> buf)
+            : base(true)
+        {
+            if (buf.Length != KeySize)
+                throw new ArgumentException("must have length " + KeySize, nameof(buf));
+
+            buf.CopyTo(data);
+        }
+#endif
+
+        public Ed25519PrivateKeyParameters(Stream input)
+            : base(true)
+        {
+            if (KeySize != Streams.ReadFully(input, data))
+                throw new EndOfStreamException("EOF encountered in middle of Ed25519 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 Ed25519PublicKeyParameters GeneratePublicKey()
+        {
+            lock (data)
+            {
+                if (null == cachedPublicKey)
+                {
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+                    Span<byte> publicKey = stackalloc byte[Ed25519.PublicKeySize];
+                    Ed25519.GeneratePublicKey(data, publicKey);
+                    cachedPublicKey = new Ed25519PublicKeyParameters(publicKey);
+#else
+                    byte[] publicKey = new byte[Ed25519.PublicKeySize];
+                    Ed25519.GeneratePublicKey(data, 0, publicKey, 0);
+                    cachedPublicKey = new Ed25519PublicKeyParameters(publicKey, 0);
+#endif
+                }
+
+                return cachedPublicKey;
+            }
+        }
+
+        public void Sign(Ed25519.Algorithm algorithm, byte[] ctx, byte[] msg, int msgOff, int msgLen,
+            byte[] sig, int sigOff)
+        {
+            Ed25519PublicKeyParameters publicKey = GeneratePublicKey();
+
+            byte[] pk = new byte[Ed25519.PublicKeySize];
+            publicKey.Encode(pk, 0);
+
+            switch (algorithm)
+            {
+            case Ed25519.Algorithm.Ed25519:
+            {
+                if (null != ctx)
+                    throw new ArgumentException("ctx");
+
+                Ed25519.Sign(data, 0, pk, 0, msg, msgOff, msgLen, sig, sigOff);
+                break;
+            }
+            case Ed25519.Algorithm.Ed25519ctx:
+            {
+                Ed25519.Sign(data, 0, pk, 0, ctx, msg, msgOff, msgLen, sig, sigOff);
+                break;
+            }
+            case Ed25519.Algorithm.Ed25519ph:
+            {
+                if (Ed25519.PrehashSize != msgLen)
+                    throw new ArgumentException("msgLen");
+
+                Ed25519.SignPrehash(data, 0, pk, 0, ctx, msg, msgOff, sig, sigOff);
+                break;
+            }
+            default:
+            {
+                throw new ArgumentException("algorithm");
+            }
+            }
+        }
+
+        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