Articolo
11/18/2011

AesManaged Constructor

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Initializes a new instance of the AesManaged class.

Namespace: System.Security.Cryptography
Assembly: System.Core (in System.Core.dll)

Syntax

'Declaration
Public Sub New

public AesManaged()

Examples

The following example demonstrates how to use the AesManaged constructor when you encrypt an isolated storage file. This code example is part of a larger example provided for the AesManaged class.

Using aes = New System.Security.Cryptography.AesManaged()
    Dim deriveBytes As New Rfc2898DeriveBytes(passwordBox.Password, Encoding.UTF8.GetBytes(PasswordSalt))
    aes.Key = deriveBytes.GetBytes(128 / 8)
    If Integer.MaxValue = Int64.MaxValue Then intSize = 8
    isoStoreStream.Write(BitConverter.GetBytes(aes.IV.Length), 0, intSize)
    isoStoreStream.Write(aes.IV, 0, aes.IV.Length)
    Using cs As New CryptoStream(isoStoreStream, aes.CreateEncryptor(), CryptoStreamMode.Write)
        Dim rawPlaintext As Byte() = Encoding.Unicode.GetBytes(inputBox.Text)
        cs.Write(rawPlaintext, 0, rawPlaintext.Length)
        cs.FlushFinalBlock()
    End Using
End Using

using (Aes aes = new AesManaged())
{
    Rfc2898DeriveBytes deriveBytes = new Rfc2898DeriveBytes(passwordBox.Password, Encoding.UTF8.GetBytes(PasswordSalt));
    aes.Key = deriveBytes.GetBytes(128 / 8);
    isoStoreStream.Write(BitConverter.GetBytes(aes.IV.Length), 0, sizeof(int));
    isoStoreStream.Write(aes.IV, 0, aes.IV.Length);

    using (CryptoStream cs = new CryptoStream(isoStoreStream, aes.CreateEncryptor(), CryptoStreamMode.Write))
    {
        byte[] rawPlaintext = Encoding.Unicode.GetBytes(inputBox.Text);
        cs.Write(rawPlaintext, 0, rawPlaintext.Length);
        cs.FlushFinalBlock();
    }
}

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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