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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/crypto/io/SignerStream.cs

@@ -0,0 +1,164 @@
+#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
+#pragma warning disable
+using System;
+using System.IO;
+
+using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
+
+namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.IO
+{
+    public sealed class SignerStream
+        : Stream
+    {
+        private readonly Stream stream;
+        private readonly ISigner inSigner;
+        private readonly ISigner outSigner;
+
+        public SignerStream(Stream stream, ISigner readSigner, ISigner writeSigner)
+        {
+            this.stream = stream;
+            this.inSigner = readSigner;
+            this.outSigner = writeSigner;
+        }
+
+        public ISigner ReadSigner => inSigner;
+
+        public ISigner WriteSigner => outSigner;
+
+        public override bool CanRead
+        {
+            get { return stream.CanRead; }
+        }
+
+        public sealed override bool CanSeek
+        {
+            get { return false; }
+        }
+
+        public override bool CanWrite
+        {
+            get { return stream.CanWrite; }
+        }
+
+#if NETCOREAPP2_0_OR_GREATER || NETSTANDARD2_1_OR_GREATER || (UNITY_2021_2_OR_NEWER && (NET_STANDARD_2_0 || NET_STANDARD_2_1))
+        public override void CopyTo(Stream destination, int bufferSize)
+        {
+            if (inSigner == null)
+            {
+                stream.CopyTo(destination, bufferSize);
+            }
+            else
+            {
+                base.CopyTo(destination, bufferSize);
+            }
+        }
+#endif
+
+        public override void Flush()
+        {
+            stream.Flush();
+        }
+
+        public sealed override long Length
+        {
+            get { throw new NotSupportedException(); }
+        }
+
+        public sealed override long Position
+        {
+            get { throw new NotSupportedException(); }
+            set { throw new NotSupportedException(); }
+        }
+
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            int n = stream.Read(buffer, offset, count);
+
+            if (inSigner != null && n > 0)
+            {
+                inSigner.BlockUpdate(buffer, offset, n);
+            }
+
+            return n;
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public override int Read(Span<byte> buffer)
+        {
+            int n = stream.Read(buffer);
+
+            if (inSigner != null && n > 0)
+            {
+                inSigner.BlockUpdate(buffer[..n]);
+            }
+
+            return n;
+        }
+#endif
+
+        public override int ReadByte()
+        {
+            int b = stream.ReadByte();
+
+            if (inSigner != null && b >= 0)
+            {
+                inSigner.Update((byte)b);
+            }
+
+            return b;
+        }
+
+        public sealed override long Seek(long offset, SeekOrigin origin)
+        {
+            throw new NotSupportedException();
+        }
+
+        public sealed override void SetLength(long length)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            stream.Write(buffer, offset, count);
+
+            if (outSigner != null && count > 0)
+            {
+                outSigner.BlockUpdate(buffer, offset, count);
+            }
+        }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || UNITY_2021_2_OR_NEWER
+        public override void Write(ReadOnlySpan<byte> buffer)
+        {
+            stream.Write(buffer);
+
+            if (outSigner != null && !buffer.IsEmpty)
+            {
+                outSigner.BlockUpdate(buffer);
+            }
+        }
+#endif
+
+        public override void WriteByte(byte value)
+        {
+            stream.WriteByte(value);
+
+            if (outSigner != null)
+            {
+                outSigner.Update(value);
+            }
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                stream.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+    }
+}
+#pragma warning restore
+#endif