1 files changed, 47 insertions, 0 deletions
diff --git a/crypto/src/util/io/BaseOutputStream.cs b/crypto/src/util/io/BaseOutputStream.cs
new file mode 100644
index 000000000..6e6c6d346
--- /dev/null
+++ b/crypto/src/util/io/BaseOutputStream.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+
+namespace Org.BouncyCastle.Utilities.IO
+{
+    public abstract class BaseOutputStream : Stream
+    {
+		private bool closed;
+
+		public sealed override bool CanRead { get { return false; } }
+        public sealed override bool CanSeek { get { return false; } }
+        public sealed override bool CanWrite { get { return !closed; } }
+		public override void Close() { closed = true; }
+        public override void Flush() {}
+        public sealed override long Length { get { throw new NotSupportedException(); } }
+        public sealed override long Position
+        {
+            get { throw new NotSupportedException(); }
+            set { throw new NotSupportedException(); }
+        }
+        public sealed override int Read(byte[] buffer, int offset, int count) { throw new NotSupportedException(); }
+        public sealed override long Seek(long offset, SeekOrigin origin) { throw new NotSupportedException(); }
+        public sealed override void SetLength(long value) { throw new NotSupportedException(); }
+
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            Debug.Assert(buffer != null);
+            Debug.Assert(0 <= offset && offset <= buffer.Length);
+            Debug.Assert(count >= 0);
+
+            int end = offset + count;
+
+            Debug.Assert(0 <= end && end <= buffer.Length);
+
+            for (int i = offset; i < end; ++i)
+            {
+                this.WriteByte(buffer[i]);
+            }
+        }
+
+		public virtual void Write(params byte[] buffer)
+		{
+			Write(buffer, 0, buffer.Length);
+		}
+	}
+}