RijndaelManaged-Klasse

Artikel
08/20/2007

Greift auf die verwaltete Version des Rijndael-Algorithmus zu. Diese Klasse kann nicht vererbt werden.

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

Syntax

'Declaration
<ComVisibleAttribute(True)> _
Public NotInheritable Class RijndaelManaged
    Inherits Rijndael
'Usage
Dim instance As RijndaelManaged

[ComVisibleAttribute(true)] 
public sealed class RijndaelManaged : Rijndael

[ComVisibleAttribute(true)] 
public ref class RijndaelManaged sealed : public Rijndael

/** @attribute ComVisibleAttribute(true) */ 
public final class RijndaelManaged extends Rijndael

ComVisibleAttribute(true) 
public final class RijndaelManaged extends Rijndael

Hinweise

Dieser Algorithmus unterstützt Schlüssellängen von 128, 192 oder 256 Bits.

Thema	Position
Gewusst wie: Verschlüsseln von XML-Elementen mit symmetrischen Schlüsseln	.NET Framework: Sicherheit
Gewusst wie: Entschlüsseln von XML-Elementen mit symmetrischen Schlüsseln	.NET Framework: Sicherheit
Gewusst wie: Entschlüsseln von XML-Elementen mit symmetrischen Schlüsseln	.NET Framework: Sicherheit
Gewusst wie: Verschlüsseln von XML-Elementen mit symmetrischen Schlüsseln	.NET Framework: Sicherheit

Beispiel

Imports System
Imports System.IO
Imports System.Text
Imports System.Security.Cryptography

Namespace RijndaelManaged_Examples
    Class MyMainClass
        Public Shared Sub Main()
            Dim original As String = "This is a much longer string of data than a public/private key algorithm will accept."
            Dim roundtrip As String
            Dim textConverter As New ASCIIEncoding()
            Dim myRijndael As New RijndaelManaged()
            Dim fromEncrypt() As Byte
            Dim encrypted() As Byte
            Dim toEncrypt() As Byte
            Dim key() As Byte
            Dim IV() As Byte

            'Create a new key and initialization vector.
            myRijndael.GenerateKey()
            myRijndael.GenerateIV()

            'Get the key and IV.
            key = myRijndael.Key
            IV = myRijndael.IV

            'Get an encryptor.
            Dim encryptor As ICryptoTransform = myRijndael.CreateEncryptor(key, IV)

            'Encrypt the data.
            Dim msEncrypt As New MemoryStream()
            Dim csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)

            'Convert the data to a byte array.
            toEncrypt = textConverter.GetBytes(original)

            'Write all data to the crypto stream and flush it.
            csEncrypt.Write(toEncrypt, 0, toEncrypt.Length)
            csEncrypt.FlushFinalBlock()

            'Get encrypted array of bytes.
            encrypted = msEncrypt.ToArray()

            'This is where the message would be transmitted to a recipient
            ' who already knows your secret key. Optionally, you can
            ' also encrypt your secret key using a public key algorithm
            ' and pass it to the mesage recipient along with the RijnDael
            ' encrypted message.            
            'Get a decryptor that uses the same key and IV as the encryptor.
            Dim decryptor As ICryptoTransform = myRijndael.CreateDecryptor(key, IV)

            'Now decrypt the previously encrypted message using the decryptor
            ' obtained in the above step.
            Dim msDecrypt As New MemoryStream(encrypted)
            Dim csDecrypt As New CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)

            fromEncrypt = New Byte(encrypted.Length) {}

            'Read the data out of the crypto stream.
            csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length)

            'Convert the byte array back into a string.
            roundtrip = textConverter.GetString(fromEncrypt)

            'Display the original data and the decrypted data.
            Console.WriteLine("Original:   {0}", original)
            Console.WriteLine("Round Trip: {0}", roundtrip)
        End Sub 'Main
    End Class 'MyMainClass
End Namespace 'RijndaelManaged_Examples

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;

namespace RijndaelManaged_Examples
{
    class MyMainClass
    {
        public static void Main()
        {
            string original = "This is a much longer string of data than a public/private key algorithm will accept.";
            string roundtrip;
            ASCIIEncoding textConverter = new ASCIIEncoding();
            RijndaelManaged myRijndael = new RijndaelManaged();
            byte[] fromEncrypt;
            byte[] encrypted;
            byte[] toEncrypt;
            byte[] key;
            byte[] IV;

            //Create a new key and initialization vector.
            myRijndael.GenerateKey();
            myRijndael.GenerateIV();

            //Get the key and IV.
            key = myRijndael.Key;
            IV = myRijndael.IV;

            //Get an encryptor.
            ICryptoTransform encryptor = myRijndael.CreateEncryptor(key, IV);
            
            //Encrypt the data.
            MemoryStream msEncrypt = new MemoryStream();
            CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);

            //Convert the data to a byte array.
            toEncrypt = textConverter.GetBytes(original);

            //Write all data to the crypto stream and flush it.
            csEncrypt.Write(toEncrypt, 0, toEncrypt.Length);
            csEncrypt.FlushFinalBlock();

            //Get encrypted array of bytes.
            encrypted = msEncrypt.ToArray();

            //This is where the message would be transmitted to a recipient
            // who already knows your secret key. Optionally, you can
            // also encrypt your secret key using a public key algorithm
            // and pass it to the mesage recipient along with the RijnDael
            // encrypted message.            

            //Get a decryptor that uses the same key and IV as the encryptor.
            ICryptoTransform decryptor = myRijndael.CreateDecryptor(key, IV);

            //Now decrypt the previously encrypted message using the decryptor
            // obtained in the above step.
            MemoryStream msDecrypt = new MemoryStream(encrypted);
            CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);

            fromEncrypt = new byte[encrypted.Length];

            //Read the data out of the crypto stream.
            csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);

            //Convert the byte array back into a string.
            roundtrip = textConverter.GetString(fromEncrypt);

            //Display the original data and the decrypted data.
            Console.WriteLine("Original:   {0}", original);
            Console.WriteLine("Round Trip: {0}", roundtrip);
        }
    }
}

#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Text;
using namespace System::Security::Cryptography;
int main()
{
   String^ original = "This is a much longer string of data than a public/private key algorithm will accept.";
   String^ roundtrip;
   ASCIIEncoding^ textConverter = gcnew ASCIIEncoding;
   RijndaelManaged^ myRijndael = gcnew RijndaelManaged;
   array<Byte>^fromEncrypt;
   array<Byte>^encrypted;
   array<Byte>^toEncrypt;
   array<Byte>^key;
   array<Byte>^IV;
   
   //Create a new key and initialization vector.
   myRijndael->GenerateKey();
   myRijndael->GenerateIV();
   
   //Get the key and IV.
   key = myRijndael->Key;
   IV = myRijndael->IV;
   
   //Get an encryptor.
   ICryptoTransform^ encryptor = myRijndael->CreateEncryptor( key, IV );
   
   //Encrypt the data.
   MemoryStream^ msEncrypt = gcnew MemoryStream;
   CryptoStream^ csEncrypt = gcnew CryptoStream( msEncrypt,encryptor,CryptoStreamMode::Write );
   
   //Convert the data to a Byte array.
   toEncrypt = textConverter->GetBytes( original );
   
   //Write all data to the crypto stream and flush it.
   csEncrypt->Write( toEncrypt, 0, toEncrypt->Length );
   csEncrypt->FlushFinalBlock();
   
   //Get encrypted array of bytes.
   encrypted = msEncrypt->ToArray();
   
   //This is where the message would be transmitted to a recipient
   // who already knows your secret key. Optionally, you can
   // also encrypt your secret key using a public key algorithm
   // and pass it to the mesage recipient along with the RijnDael
   // encrypted message.            
   //Get a decryptor that uses the same key and IV as the encryptor.
   ICryptoTransform^ decryptor = myRijndael->CreateDecryptor( key, IV );
   
   //Now decrypt the previously encrypted message using the decryptor
   // obtained in the above step.
   MemoryStream^ msDecrypt = gcnew MemoryStream( encrypted );
   CryptoStream^ csDecrypt = gcnew CryptoStream( msDecrypt,decryptor,CryptoStreamMode::Read );
   fromEncrypt = gcnew array<Byte>(encrypted->Length);
   
   //Read the data out of the crypto stream.
   csDecrypt->Read( fromEncrypt, 0, fromEncrypt->Length );
   
   //Convert the Byte array back into a String*.
   roundtrip = textConverter->GetString( fromEncrypt );
   
   //Display the original data and the decrypted data.
   Console::WriteLine( "Original:   {0}", original );
   Console::WriteLine( "Round Trip: {0}", roundtrip );
}

package RijndaelManaged_Examples; 

import System.*;
import System.IO.*;
import System.Text.*;
import System.Security.Cryptography.*;

class MyMainClass
{
    public static void main(String[] args)
    {      
        String original = "This is a much longer string of data than a "
            + "public/private key algorithm will accept.";
        String roundTrip;
        ASCIIEncoding textConverter = new ASCIIEncoding();
        RijndaelManaged myRijndael = new RijndaelManaged();
        ubyte fromEncrypt[];
        ubyte encrypted[];
        ubyte toEncrypt[];
        ubyte key[];
        ubyte iv[];
        //Create a new key and initialization vector.
        myRijndael.GenerateKey();
        myRijndael.GenerateIV();
        //Get the key and iv.
        key = myRijndael.get_Key();
        iv = myRijndael.get_IV();
        //Get an encryptor.
        ICryptoTransform encryptor = myRijndael.CreateEncryptor(key, iv);
        //Encrypt the data.
        MemoryStream msEncrypt = new MemoryStream();
        CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, 
            CryptoStreamMode.Write);
        //Convert the data to a byte array.
        toEncrypt = textConverter.GetBytes(original);
        //Write all data to the crypto stream and flush it.
        csEncrypt.Write(toEncrypt, 0, toEncrypt.get_Length());
        csEncrypt.FlushFinalBlock();
        //Get encrypted array of bytes.
        encrypted = msEncrypt.ToArray();
        //This is where the message would be transmitted to a recipient
        // who already knows your secret key. Optionally, you can
        // also encrypt your secret key using a public key algorithm
        // and pass it to the mesage recipient along with the RijnDael
        // encrypted message.            
        //Get a decryptor that uses the same key and iv as the encryptor.
        ICryptoTransform decryptor = myRijndael.CreateDecryptor(key, iv);
        //Now decrypt the previously encrypted message using the decryptor
        // obtained in the above step.
        MemoryStream msDecrypt = new MemoryStream(encrypted);
        CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor,
            CryptoStreamMode.Read);
        fromEncrypt = new ubyte[encrypted.get_Length()];
        //Read the data out of the crypto stream.
        csDecrypt.Read(fromEncrypt, 0, fromEncrypt.get_Length());
        //Convert the byte array back into a string.
        roundTrip = textConverter.GetString(fromEncrypt);
        //Display the original data and the decrypted data.
        Console.WriteLine("Original:   {0}", original);
        Console.WriteLine("Round Trip: {0}", roundTrip);
    } //main
} //MyMainClass

Vererbungshierarchie

System.Object
   System.Security.Cryptography.SymmetricAlgorithm
     System.Security.Cryptography.Rijndael
      System.Security.Cryptography.RijndaelManaged

Threadsicherheit

Alle öffentlichen statischen (Shared in Visual Basic) Member dieses Typs sind threadsicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Freigeben über

RijndaelManaged-Klasse

Syntax

Hinweise

Beispiel

Vererbungshierarchie

Threadsicherheit

Plattformen

Versionsinformationen

.NET Framework

.NET Compact Framework

Siehe auch

Referenz

Weitere Ressourcen

Zusätzliche Ressourcen