-//\r
-// System.Security.Cryptography CryptoStream.cs\r
-//\r
-// Author:\r
-// Thomas Neidhart (tome@sbox.tugraz.at)\r
-//\r
-\r
-using System;\r
-using System.IO;\r
-\r
-namespace System.Security.Cryptography\r
-{\r
-\r
- public class CryptoStream : Stream\r
- {\r
- private CryptoStreamMode _mode;\r
- \r
- public CryptoStream(Stream stream, ICryptoTransform transform, CryptoStreamMode mode) \r
- {\r
- _mode = mode;\r
- }\r
- \r
- public override bool CanRead\r
- {\r
- get {\r
- switch (_mode) {\r
- case CryptoStreamMode.Read:\r
- return true;\r
- \r
- case CryptoStreamMode.Write:\r
- return false;\r
- \r
- default:\r
- return false;\r
- }\r
- }\r
- }\r
-\r
- public override bool CanSeek\r
- {\r
- get {\r
- return false;\r
- }\r
- }\r
-\r
- public override bool CanWrite\r
- {\r
- get {\r
- switch (_mode) {\r
- case CryptoStreamMode.Read:\r
- return false;\r
- \r
- case CryptoStreamMode.Write:\r
- return true;\r
- \r
- default:\r
- return false;\r
- }\r
- }\r
- }\r
- \r
- public override long Length\r
- {\r
- get {\r
- throw new NotSupportedException("Length property not supported by CryptoStream");\r
- }\r
- }\r
-\r
- public override long Position\r
- {\r
- get {\r
- throw new NotSupportedException("Position property not supported by CryptoStream");\r
- }\r
- set {\r
- throw new NotSupportedException("Position property not supported by CryptoStream");\r
- }\r
- }\r
-\r
- [MonoTODO]\r
- public override int Read(byte[] buffer, int offset, int count)\r
- {\r
- // TODO: implement\r
- return 0;\r
- }\r
-\r
- [MonoTODO]\r
- public override void Write(byte[] buffer, int offset, int count)\r
- {\r
- // TODO: implement\r
- }\r
-\r
- [MonoTODO]\r
- public override void Flush()\r
- {\r
- // TODO: implement\r
- }\r
-\r
- [MonoTODO]\r
- public void FlushFinalBlock()\r
- {\r
- if (_mode != CryptoStreamMode.Write)\r
- throw new NotSupportedException("cannot flush a non-writeable CryptoStream");\r
- \r
- // TODO: implement\r
- }\r
-\r
- public override long Seek(long offset, SeekOrigin origin)\r
- {\r
- throw new NotSupportedException("cannot seek a CryptoStream");\r
- }\r
- \r
- public override void SetLength(long value)\r
- {\r
- // LAMESPEC: should throw NotSupportedException like Seek??\r
- return;\r
- }\r
- \r
- } // CryptoStream\r
- \r
-} // System.Security.Cryptography\r
+//
+// System.Security.Cryptography CryptoStream.cs
+//
+// Author:
+// Thomas Neidhart (tome@sbox.tugraz.at)
+// Sebastien Pouliot (spouliot@motus.com)
+//
+// Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)
+//
+
+using System;
+using System.IO;
+
+namespace System.Security.Cryptography {
+
+public class CryptoStream : Stream {
+ private Stream _stream;
+ private ICryptoTransform _transform;
+ private CryptoStreamMode _mode;
+
+ public CryptoStream(Stream stream, ICryptoTransform transform, CryptoStreamMode mode)
+ {
+ _stream = stream;
+ _transform = transform;
+ _mode = mode;
+ }
+
+ ~CryptoStream ()
+ {
+ Dispose (false);
+ }
+
+ public override bool CanRead {
+ get { return (_mode == CryptoStreamMode.Read); }
+ }
+
+ public override bool CanSeek {
+ get { return false; }
+ }
+
+ public override bool CanWrite {
+ get { return (_mode == CryptoStreamMode.Write); }
+ }
+
+ public override long Length {
+ get {
+ throw new NotSupportedException("Length property not supported by CryptoStream");
+ }
+ }
+
+ public override long Position {
+ get {
+ throw new NotSupportedException("Position property not supported by CryptoStream");
+ }
+ set {
+ throw new NotSupportedException("Position property not supported by CryptoStream");
+ }
+ }
+
+ public void Clear ()
+ {
+ Dispose (true);
+ }
+
+ [MonoTODO("Limited support for HMACSHA1")]
+ public override void Close ()
+ {
+ if (_mode != CryptoStreamMode.Write)
+ throw new NotSupportedException ();
+ // TODO: limited implemention for HMACSHA1
+ byte[] buffer = new byte [0];
+ _transform.TransformFinalBlock (buffer, 0, 0);
+ if (_stream != null)
+ _stream.Close();
+ }
+
+ [MonoTODO]
+ public override int Read (byte[] buffer, int offset, int count)
+ {
+ if (_mode != CryptoStreamMode.Read)
+ throw new NotSupportedException ();
+ if ((offset < 0) || (count < 0))
+ throw new ArgumentOutOfRangeException ();
+ if (offset + count > buffer.Length)
+ throw new ArgumentException ();
+ // TODO: implement
+ return 0;
+ }
+
+ [MonoTODO("Limited support for HMACSHA1")]
+ public override void Write (byte[] buffer, int offset, int count)
+ {
+ if (_mode != CryptoStreamMode.Write)
+ throw new NotSupportedException ();
+ if ((offset < 0) || (count < 0))
+ throw new ArgumentOutOfRangeException ();
+ if (offset + count > buffer.Length)
+ throw new ArgumentException ();
+ // TODO: limited implemention for HMACSHA1
+ byte[] output = new byte [count];
+ _transform.TransformBlock (buffer, offset, count, output, 0);
+ }
+
+ [MonoTODO]
+ public override void Flush ()
+ {
+ if (_mode != CryptoStreamMode.Write)
+ throw new NotSupportedException ("cannot flush a non-writeable CryptoStream");
+ // TODO: implement
+ }
+
+ [MonoTODO]
+ public void FlushFinalBlock ()
+ {
+ if (_mode != CryptoStreamMode.Write)
+ throw new NotSupportedException ("cannot flush a non-writeable CryptoStream");
+ // TODO: implement
+ }
+
+ public override long Seek (long offset, SeekOrigin origin)
+ {
+ throw new NotSupportedException ("cannot Seek a CryptoStream");
+ }
+
+ // LAMESPEC: Exception NotSupportedException not documented
+ public override void SetLength (long value)
+ {
+ throw new NotSupportedException ("cannot SetLength a CryptoStream");
+ }
+
+ protected virtual void Dispose (bool disposing)
+ {
+ }
+
+} // CryptoStream
+
+} // System.Security.Cryptography
projects / mono.git / blobdiff