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//
// System.Security.Cryptography.AesCryptoServiceProvider class
//
// Authors:
// Sebastien Pouliot (sebastien@xamarin.com)
//
// Copyright (C) 2008 Novell, Inc (http://www.novell.com)
// Copyright 2013 Xamarin Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Security.Permissions;
using Mono.Security.Cryptography;
namespace System.Security.Cryptography {
[HostProtection (SecurityAction.LinkDemand, MayLeakOnAbort=true)]
public sealed class AesCryptoServiceProvider : Aes {
public AesCryptoServiceProvider ()
{
FeedbackSizeValue = 8;
}
public override void GenerateIV ()
{
IVValue = KeyBuilder.IV (BlockSizeValue >> 3);
}
public override void GenerateKey ()
{
KeyValue = KeyBuilder.Key (KeySizeValue >> 3);
}
public override ICryptoTransform CreateDecryptor (byte[] rgbKey, byte[] rgbIV)
{
if ((Mode == CipherMode.CFB) && (FeedbackSize > 64))
throw new CryptographicException ("CFB with Feedbaack > 64 bits");
return new AesTransform (this, false, rgbKey, rgbIV);
}
public override ICryptoTransform CreateEncryptor (byte[] rgbKey, byte[] rgbIV)
{
if ((Mode == CipherMode.CFB) && (FeedbackSize > 64))
throw new CryptographicException ("CFB with Feedbaack > 64 bits");
return new AesTransform (this, true, rgbKey, rgbIV);
}
// I suppose some attributes differs ?!? because this does not look required
public override byte[] IV {
get { return base.IV; }
set { base.IV = value; }
}
public override byte[] Key {
get { return base.Key; }
set { base.Key = value; }
}
public override int KeySize {
get { return base.KeySize; }
set { base.KeySize = value; }
}
public override int FeedbackSize {
get { return base.FeedbackSize; }
set { base.FeedbackSize = value; }
}
public override CipherMode Mode {
get { return base.Mode; }
set {
switch (value) {
case CipherMode.CTS:
throw new CryptographicException ("CTS is not supported");
default:
base.Mode = value;
break;
}
}
}
public override PaddingMode Padding {
get { return base.Padding; }
set { base.Padding = value; }
}
public override ICryptoTransform CreateDecryptor ()
{
return CreateDecryptor (Key, IV);
}
public override ICryptoTransform CreateEncryptor()
{
return CreateEncryptor (Key, IV);
}
protected override void Dispose (bool disposing)
{
base.Dispose (disposing);
}
}
}
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