RijndaelManaged.cs

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using System.ComponentModel;
using System.Runtime.Versioning;
 
namespace System.Security.Cryptography;
 
[Obsolete("The Rijndael and RijndaelManaged types are obsolete. Use Aes instead.", DiagnosticId = "SYSLIB0022", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
[EditorBrowsable(EditorBrowsableState.Never)]
[UnsupportedOSPlatform("browser")]
public sealed class RijndaelManaged : Rijndael
{
    private readonly Aes _impl;
 
    public override int BlockSize
    {
        get
        {
            return _impl.BlockSize;
        }
        set
        {
            switch (value)
            {
            case 192:
            case 256:
                throw new PlatformNotSupportedException(System.SR.Cryptography_Rijndael_BlockSize);
            default:
                throw new CryptographicException(System.SR.Cryptography_Rijndael_BlockSize);
            case 128:
                break;
            }
        }
    }
 
    public override int FeedbackSize
    {
        get
        {
            return _impl.FeedbackSize;
        }
        set
        {
            _impl.FeedbackSize = value;
        }
    }
 
    public override byte[] IV
    {
        get
        {
            return _impl.IV;
        }
        set
        {
            _impl.IV = value;
        }
    }
 
    public override byte[] Key
    {
        get
        {
            return _impl.Key;
        }
        set
        {
            _impl.Key = value;
        }
    }
 
    public override int KeySize
    {
        get
        {
            return _impl.KeySize;
        }
        set
        {
            _impl.KeySize = value;
        }
    }
 
    public override CipherMode Mode
    {
        get
        {
            return _impl.Mode;
        }
        set
        {
            _impl.Mode = value;
        }
    }
 
    public override PaddingMode Padding
    {
        get
        {
            return _impl.Padding;
        }
        set
        {
            _impl.Padding = value;
        }
    }
 
    public override KeySizes[] LegalKeySizes => _impl.LegalKeySizes;
 
    public RijndaelManaged()
    {
        LegalBlockSizesValue = new KeySizes[1]
        {
            new KeySizes(128, 128, 0)
        };
        _impl = Aes.Create();
        _impl.FeedbackSize = 128;
    }
 
    public override ICryptoTransform CreateEncryptor()
    {
        return _impl.CreateEncryptor();
    }
 
    public override ICryptoTransform CreateEncryptor(byte[] rgbKey, byte[]? rgbIV)
    {
        return _impl.CreateEncryptor(rgbKey, rgbIV);
    }
 
    public override ICryptoTransform CreateDecryptor()
    {
        return _impl.CreateDecryptor();
    }
 
    public override ICryptoTransform CreateDecryptor(byte[] rgbKey, byte[]? rgbIV)
    {
        return _impl.CreateDecryptor(rgbKey, rgbIV);
    }
 
    public override void GenerateIV()
    {
        _impl.GenerateIV();
    }
 
    public override void GenerateKey()
    {
        _impl.GenerateKey();
    }
 
    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            _impl.Dispose();
            base.Dispose(disposing);
        }
    }
}