Initial Commit

2023-06-21 12:46:23 -04:00
commit c70248a520
1352 changed files with 336780 additions and 0 deletions
--- a/iTechSharp/srcbc/crypto/io/MacStream.cs
+++ b/iTechSharp/srcbc/crypto/io/MacStream.cs
@@ -0,0 +1,116 @@
+using System;
+using System.IO;
+using Org.BouncyCastle.Crypto;
+namespace Org.BouncyCastle.Crypto.IO
+{
+    public class MacStream : Stream
+    {
+        internal Stream stream;
+        internal IMac inMac;
+        internal IMac outMac;
+
+        public MacStream(
+            Stream stream,
+            IMac readMac,
+            IMac writeMac)
+        {
+            this.stream = stream;
+            this.inMac = readMac;
+            this.outMac = writeMac;
+        }
+        public IMac ReadMac()
+        {
+            return inMac;
+        }
+        public IMac WriteMac()
+        {
+            return outMac;
+        }
+        public override int ReadByte()
+        {
+            int b = stream.ReadByte();
+            if (inMac != null)
+            {
+                if (b >= 0)
+                {
+                    inMac.Update((byte)b);
+                }
+            }
+            return b;
+        }
+
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            int n = stream.Read(buffer, offset, count);
+            if (inMac != null)
+            {
+                if (n > 0)
+                {
+                    inMac.BlockUpdate(buffer, offset, count);
+                }
+            }
+            return n;
+        }
+        public override void Write(
+            byte[] buffer,
+            int offset,
+            int count)
+        {
+            if (outMac != null)
+            {
+                if (count > 0)
+                {
+                    outMac.BlockUpdate(buffer, offset, count);
+                }
+            }
+            stream.Write(buffer, offset, count);
+        }
+        public override void WriteByte(byte value)
+        {
+            if (outMac != null)
+            {
+                outMac.Update(value);
+            }
+            stream.WriteByte(value);
+        }
+        public override bool CanRead
+        {
+            get { return stream.CanRead && (inMac != null);     }
+        }
+        public override bool CanWrite
+        {
+            get { return stream.CanWrite && (outMac != null);     }
+        }
+        public override bool CanSeek
+        {
+            get { return stream.CanSeek;     }
+        }
+        public override long Length
+        {
+            get { return stream.Length;     }
+        }
+        public override long Position
+        {
+            get { return stream.Position;   }
+            set { stream.Position = value;  }
+        }
+        public override void Close()
+        {
+            stream.Close();
+        }
+        public override void Flush()
+        {
+            stream.Flush();
+        }
+        public override long Seek(
+            long offset,
+            SeekOrigin origin)
+        {
+            return stream.Seek(offset,origin);
+        }
+        public override void SetLength(long value)
+        {
+            stream.SetLength(value);
+        }
+    }
+}