RijndaelManaged RijndaelManaged RijndaelManaged RijndaelManaged Class

Définition

Accède à la version managée de le Rijndael algorithme.Accesses the managed version of the Rijndael algorithm. Cette classe ne peut pas être héritée.This class cannot be inherited.

public ref class RijndaelManaged sealed : System::Security::Cryptography::Rijndael
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class RijndaelManaged : System.Security.Cryptography.Rijndael
type RijndaelManaged = class
    inherit Rijndael
Public NotInheritable Class RijndaelManaged
Inherits Rijndael
Héritage
Attributs

Exemples

L’exemple suivant montre comment chiffrer et déchiffrer les données d’exemple à l’aide la RijndaelManaged classe.The following example demonstrates how to encrypt and decrypt sample data using the RijndaelManaged class.

#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Security::Cryptography;


class RijndaelMemoryExample
{
public:
    static array<Byte>^ encryptStringToBytes_AES(String^ plainText, array<Byte>^ Key, array<Byte>^ IV)
    {
        // Check arguments.
        if (!plainText || plainText->Length <= 0)
            throw gcnew ArgumentNullException("plainText");
        if (!Key || Key->Length <= 0)
            throw gcnew ArgumentNullException("Key");
        if (!IV  || IV->Length <= 0)
            throw gcnew ArgumentNullException("IV");

        // Declare the streams used
        // to encrypt to an in memory
        // array of bytes.
		MemoryStream^   msEncrypt;
        CryptoStream^   csEncrypt;
        StreamWriter^   swEncrypt;

        // Declare the RijndaelManaged object
        // used to encrypt the data.
        RijndaelManaged^ aesAlg;

        try
        {
            // Create a RijndaelManaged object
            // with the specified key and IV.
            aesAlg = gcnew RijndaelManaged();
			aesAlg->Padding = PaddingMode::PKCS7;
            aesAlg->Key = Key;
            aesAlg->IV = IV;

            // Create an encryptor to perform the stream transform.
            ICryptoTransform^ encryptor = aesAlg->CreateEncryptor(aesAlg->Key, aesAlg->IV);

            // Create the streams used for encryption.
            msEncrypt = gcnew MemoryStream();
			csEncrypt = gcnew CryptoStream(msEncrypt, encryptor, CryptoStreamMode::Write);
            swEncrypt = gcnew StreamWriter(csEncrypt);

            //Write all data to the stream.
            swEncrypt->Write(plainText);
			swEncrypt->Flush();
			csEncrypt->FlushFinalBlock();
			msEncrypt->Flush();
        }
        finally
        {
            // Clean things up.

            // Close the streams.
            if(swEncrypt)
                swEncrypt->Close();
            if (csEncrypt)
                csEncrypt->Close();


            // Clear the RijndaelManaged object.
            if (aesAlg)
                aesAlg->Clear();
        }

        // Return the encrypted bytes from the memory stream.
        return msEncrypt->ToArray();
    }

    static String^ decryptStringFromBytes_AES(array<Byte>^ cipherText, array<Byte>^ Key, array<Byte>^ IV)
    {
        // Check arguments.
        if (!cipherText || cipherText->Length <= 0)
            throw gcnew ArgumentNullException("cipherText");
        if (!Key || Key->Length <= 0)
            throw gcnew ArgumentNullException("Key");
        if (!IV || IV->Length <= 0)
            throw gcnew ArgumentNullException("IV");

        // TDeclare the streams used
        // to decrypt to an in memory
        // array of bytes.
        MemoryStream^ msDecrypt;
        CryptoStream^ csDecrypt;
        StreamReader^ srDecrypt;

        // Declare the RijndaelManaged object
        // used to decrypt the data.
        RijndaelManaged^ aesAlg;

        // Declare the string used to hold
        // the decrypted text.
        String^ plaintext;

        try
        {
            // Create a RijndaelManaged object
            // with the specified key and IV.
            aesAlg = gcnew RijndaelManaged();
			aesAlg->Padding = PaddingMode::PKCS7;
            aesAlg->Key = Key;
            aesAlg->IV = IV;

            // Create a decryptor to perform the stream transform.
			ICryptoTransform^ decryptor = aesAlg->CreateDecryptor(aesAlg->Key, aesAlg->IV);

            // Create the streams used for decryption.
            msDecrypt = gcnew MemoryStream(cipherText);
			csDecrypt = gcnew CryptoStream(msDecrypt, decryptor, CryptoStreamMode::Read);
            srDecrypt = gcnew StreamReader(csDecrypt);

            // Read the decrypted bytes from the decrypting stream
            // and place them in a string.
            plaintext = srDecrypt->ReadToEnd();
        }
        finally
        {
            // Clean things up.

            // Close the streams.
            if (srDecrypt)
                srDecrypt->Close();
            if (csDecrypt)
                csDecrypt->Close();
            if (msDecrypt)
                msDecrypt->Close();

            // Clear the RijndaelManaged object.
            if (aesAlg)
                aesAlg->Clear();
        }

        return plaintext;
    }
};

int main()
{
    try
    {
        String^ original = "Here is some data to encrypt!";

        // Create a new instance of the RijndaelManaged
        // class.  This generates a new key and initialization
        // vector (IV).
        RijndaelManaged^ myRijndael = gcnew RijndaelManaged();

        // Encrypt the string to an array of bytes.
		array<Byte>^ encrypted = RijndaelMemoryExample::encryptStringToBytes_AES(original, myRijndael->Key, myRijndael->IV);

        // Decrypt the bytes to a string.
        String^ roundtrip = RijndaelMemoryExample::decryptStringFromBytes_AES(encrypted, myRijndael->Key, myRijndael->IV);

        //Display the original data and the decrypted data.
		Console::WriteLine("Original:   {0}", original);
		Console::WriteLine("Round Trip: {0}", roundtrip);
    }
    catch (Exception^ e)
    {
		Console::WriteLine("Error: {0}", e->Message);
    }

	return 0;
}
using System;
using System.IO;
using System.Security.Cryptography;

namespace RijndaelManaged_Example
{
    class RijndaelExample
    {
        public static void Main()
        {
            try
            {

                string original = "Here is some data to encrypt!";

                // Create a new instance of the RijndaelManaged
                // class.  This generates a new key and initialization 
                // vector (IV).
                using (RijndaelManaged myRijndael = new RijndaelManaged())
                {

					myRijndael.GenerateKey();
                	myRijndael.GenerateIV();
                    // Encrypt the string to an array of bytes.
                    byte[] encrypted = EncryptStringToBytes(original, myRijndael.Key, myRijndael.IV);

                    // Decrypt the bytes to a string.
                    string roundtrip = DecryptStringFromBytes(encrypted, myRijndael.Key, myRijndael.IV);

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

            }
            catch (Exception e)
            {
                Console.WriteLine("Error: {0}", e.Message);
            }
        }
        static byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV)
        {
            // Check arguments.
            if (plainText == null || plainText.Length <= 0)
                throw new ArgumentNullException("plainText");
            if (Key == null || Key.Length <= 0)
                throw new ArgumentNullException("Key");
            if (IV == null || IV.Length <= 0)
                throw new ArgumentNullException("IV");
            byte[] encrypted;
            // Create an RijndaelManaged object
            // with the specified key and IV.
            using (RijndaelManaged rijAlg = new RijndaelManaged())
            {
                rijAlg.Key = Key;
                rijAlg.IV = IV;

                // Create an encryptor to perform the stream transform.
                ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);

                // Create the streams used for encryption.
                using (MemoryStream msEncrypt = new MemoryStream())
                {
                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                    {
                        using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                        {

                            //Write all data to the stream.
                            swEncrypt.Write(plainText);
                        }
                        encrypted = msEncrypt.ToArray();
                    }
                }
            }


            // Return the encrypted bytes from the memory stream.
            return encrypted;

        }

        static string DecryptStringFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
        {
            // Check arguments.
            if (cipherText == null || cipherText.Length <= 0)
                throw new ArgumentNullException("cipherText");
            if (Key == null || Key.Length <= 0)
                throw new ArgumentNullException("Key");
            if (IV == null || IV.Length <= 0)
                throw new ArgumentNullException("IV");

            // Declare the string used to hold
            // the decrypted text.
            string plaintext = null;

            // Create an RijndaelManaged object
            // with the specified key and IV.
            using (RijndaelManaged rijAlg = new RijndaelManaged())
            {
                rijAlg.Key = Key;
                rijAlg.IV = IV;

                // Create a decryptor to perform the stream transform.
                ICryptoTransform decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);

                // Create the streams used for decryption.
                using (MemoryStream msDecrypt = new MemoryStream(cipherText))
                {
                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                        {
                            // Read the decrypted bytes from the decrypting stream
                            // and place them in a string.
                            plaintext = srDecrypt.ReadToEnd();
                        }
                    }
                }

            }

            return plaintext;

        }
    }
}
Imports System
Imports System.IO
Imports System.Security.Cryptography



Class RijndaelExample

    Public Shared Sub Main()
        Try

            Dim original As String = "Here is some data to encrypt!"

            ' Create a new instance of the RijndaelManaged
            ' class.  This generates a new key and initialization 
            ' vector (IV).
            Using myRijndael As New RijndaelManaged()
            
            	myRijndael.GenerateKey()
                myRijndael.GenerateIV()

                ' Encrypt the string to an array of bytes.
                Dim encrypted As Byte() = EncryptStringToBytes(original, myRijndael.Key, myRijndael.IV)

                ' Decrypt the bytes to a string.
                Dim roundtrip As String = DecryptStringFromBytes(encrypted, myRijndael.Key, myRijndael.IV)

                'Display the original data and the decrypted data.
                Console.WriteLine("Original:   {0}", original)
                Console.WriteLine("Round Trip: {0}", roundtrip)
            End Using
        Catch e As Exception
            Console.WriteLine("Error: {0}", e.Message)
        End Try

    End Sub 'Main

    Shared Function EncryptStringToBytes(ByVal plainText As String, ByVal Key() As Byte, ByVal IV() As Byte) As Byte()
        ' Check arguments.
        If plainText Is Nothing OrElse plainText.Length <= 0 Then
            Throw New ArgumentNullException("plainText")
        End If
        If Key Is Nothing OrElse Key.Length <= 0 Then
            Throw New ArgumentNullException("Key")
        End If
        If IV Is Nothing OrElse IV.Length <= 0 Then
            Throw New ArgumentNullException("IV")
        End If
        Dim encrypted() As Byte
        
        ' Create an RijndaelManaged object
        ' with the specified key and IV.
        Using rijAlg As New RijndaelManaged()

            rijAlg.Key = Key
            rijAlg.IV = IV

            ' Create an encryptor to perform the stream transform.
            Dim encryptor As ICryptoTransform = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV)
            ' Create the streams used for encryption.
            Using msEncrypt As New MemoryStream()
                Using csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)
                    Using swEncrypt As New StreamWriter(csEncrypt)
                        'Write all data to the stream.
                        swEncrypt.Write(plainText)
                    End Using
                    encrypted = msEncrypt.ToArray()
                End Using
            End Using
        End Using

        ' Return the encrypted bytes from the memory stream.
        Return encrypted

    End Function 'EncryptStringToBytes

    Shared Function DecryptStringFromBytes(ByVal cipherText() As Byte, ByVal Key() As Byte, ByVal IV() As Byte) As String
        ' Check arguments.
        If cipherText Is Nothing OrElse cipherText.Length <= 0 Then
            Throw New ArgumentNullException("cipherText")
        End If
        If Key Is Nothing OrElse Key.Length <= 0 Then
            Throw New ArgumentNullException("Key")
        End If
        If IV Is Nothing OrElse IV.Length <= 0 Then
            Throw New ArgumentNullException("IV")
        End If
        ' Declare the string used to hold
        ' the decrypted text.
        Dim plaintext As String = Nothing

        ' Create an RijndaelManaged object
        ' with the specified key and IV.
        Using rijAlg As New RijndaelManaged
            rijAlg.Key = Key
            rijAlg.IV = IV

            ' Create a decryptor to perform the stream transform.
            Dim decryptor As ICryptoTransform = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV)

            ' Create the streams used for decryption.
            Using msDecrypt As New MemoryStream(cipherText)

                Using csDecrypt As New CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)

                    Using srDecrypt As New StreamReader(csDecrypt)


                        ' Read the decrypted bytes from the decrypting stream
                        ' and place them in a string.
                        plaintext = srDecrypt.ReadToEnd()
                    End Using
                End Using
            End Using
        End Using

        Return plaintext

    End Function 'DecryptStringFromBytes 
End Class

Remarques

Cet algorithme prend en charge des longueurs de clé de 128, 192 ou 256 bits. valeur par défaut : 256 bits.This algorithm supports key lengths of 128, 192, or 256 bits; defaulting to 256 bits. Dans .NET Framework, cet algorithme prend en charge les tailles de bloc de 128, 192 ou 256 bits. valeur par défaut : 128 bits (Aes-compatible).In .NET Framework, this algorithm supports block sizes of 128, 192, or 256 bits; defaulting to 128 bits (Aes-compatible). Dans .NET Core, il est identique à AES et prend en charge uniquement une taille de bloc de 128 bits.In .NET Core, it is the same as AES and supports only a 128-bit block size.

Le Rijndael algorithme est le prédécesseur de Aes.The Rijndael algorithm is the predecessor of Aes. Vous devez utiliser le Aes classe au lieu de RijndaelManaged.You should use the Aes class instead of RijndaelManaged. Pour plus d’informations, consultez l’entrée les différences entre Rijndael et AES dans le blog de sécurité .NET.For more information, see the entry The Differences Between Rijndael and AES in the .NET Security blog.

Constructeurs

RijndaelManaged() RijndaelManaged() RijndaelManaged() RijndaelManaged()

Initialise une nouvelle instance de la classe RijndaelManaged.Initializes a new instance of the RijndaelManaged class.

Propriétés

BlockSize BlockSize BlockSize BlockSize

Obtient ou définit la taille de bloc, en bits, de l'opération de chiffrement.Gets or sets the block size, in bits, of the cryptographic operation.

FeedbackSize FeedbackSize FeedbackSize FeedbackSize

Obtient ou définit la taille des commentaires, en bits, de l'opération de chiffrement.Gets or sets the feedback size, in bits, of the cryptographic operation.

(Inherited from SymmetricAlgorithm)
IV IV IV IV

Obtient ou définit le vecteur d’initialisation (IV) à utiliser pour l’algorithme symétrique.Gets or sets the initialization vector (IV) to use for the symmetric algorithm.

Key Key Key Key

Obtient ou définit la clé secrète utilisée pour l’algorithme symétrique.Gets or sets the secret key used for the symmetric algorithm.

KeySize KeySize KeySize KeySize

Obtient ou définit la taille, en bits, de la clé secrète utilisée pour l’algorithme symétrique.Gets or sets the size, in bits, of the secret key used for the symmetric algorithm.

LegalBlockSizes LegalBlockSizes LegalBlockSizes LegalBlockSizes

Obtient les tailles de bloc, en octets, prises en charge par l'algorithme symétrique.Gets the block sizes, in bits, that are supported by the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
LegalKeySizes LegalKeySizes LegalKeySizes LegalKeySizes

Obtient les tailles de clé, en octets, prises en charge par l'algorithme symétrique.Gets the key sizes, in bits, that are supported by the symmetric algorithm.

Mode Mode Mode Mode

Obtient ou définit le mode de fonctionnement pour l'algorithme symétrique.Gets or sets the mode for operation of the symmetric algorithm.

Padding Padding Padding Padding

Obtient ou définit le mode de remplissage utilisé dans l'algorithme symétrique.Gets or sets the padding mode used in the symmetric algorithm.

Méthodes

Clear() Clear() Clear() Clear()

Libère toutes les ressources utilisées par la classe SymmetricAlgorithm.Releases all resources used by the SymmetricAlgorithm class.

(Inherited from SymmetricAlgorithm)
CreateDecryptor() CreateDecryptor() CreateDecryptor() CreateDecryptor()
CreateDecryptor(Byte[], Byte[]) CreateDecryptor(Byte[], Byte[]) CreateDecryptor(Byte[], Byte[]) CreateDecryptor(Byte[], Byte[])

Crée un Rijndael objet déchiffreur avec la valeur Key et le vecteur d’initialisation (IV).Creates a symmetric Rijndael decryptor object with the specified Key and initialization vector (IV).

CreateEncryptor() CreateEncryptor() CreateEncryptor() CreateEncryptor()
CreateEncryptor(Byte[], Byte[]) CreateEncryptor(Byte[], Byte[]) CreateEncryptor(Byte[], Byte[]) CreateEncryptor(Byte[], Byte[])

Crée un Rijndael objet chiffreur avec la valeur Key et le vecteur d’initialisation (IV).Creates a symmetric Rijndael encryptor object with the specified Key and initialization vector (IV).

Dispose() Dispose() Dispose() Dispose()

Libère toutes les ressources utilisées par l'instance actuelle de la classe SymmetricAlgorithm.Releases all resources used by the current instance of the SymmetricAlgorithm class.

(Inherited from SymmetricAlgorithm)
Dispose(Boolean) Dispose(Boolean) Dispose(Boolean) Dispose(Boolean)

Libère les ressources non managées utilisées par SymmetricAlgorithm et libère éventuellement les ressources managées.Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(Inherited from SymmetricAlgorithm)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Détermine si l'objet spécifié est identique à l'objet actuel.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GenerateIV() GenerateIV() GenerateIV() GenerateIV()

Génère un vecteur d’initialisation aléatoire (IV) à utiliser pour l’algorithme.Generates a random initialization vector (IV) to be used for the algorithm.

GenerateKey() GenerateKey() GenerateKey() GenerateKey()

Génère un aléatoire Key à utiliser pour l’algorithme.Generates a random Key to be used for the algorithm.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Fait office de fonction de hachage par défaut.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtient le Type de l'instance actuelle.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crée une copie superficielle du Object actuel.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Retourne une chaîne qui représente l'objet actuel.Returns a string that represents the current object.

(Inherited from Object)
ValidKeySize(Int32) ValidKeySize(Int32) ValidKeySize(Int32) ValidKeySize(Int32)

Détermine si la taille de clé spécifiée est valide pour l'algorithme en cours.Determines whether the specified key size is valid for the current algorithm.

(Inherited from SymmetricAlgorithm)

Champs

BlockSizeValue BlockSizeValue BlockSizeValue BlockSizeValue

Représente la taille de bloc, en bits, de l'opération de chiffrement.Represents the block size, in bits, of the cryptographic operation.

(Inherited from SymmetricAlgorithm)
FeedbackSizeValue FeedbackSizeValue FeedbackSizeValue FeedbackSizeValue

Représente la taille des commentaires, en bits, de l'opération de chiffrement.Represents the feedback size, in bits, of the cryptographic operation.

(Inherited from SymmetricAlgorithm)
IVValue IVValue IVValue IVValue

Représente le vecteur d'initialisation (IV) pour l'algorithme symétrique.Represents the initialization vector (IV) for the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
KeySizeValue KeySizeValue KeySizeValue KeySizeValue

Représente la taille, en bits, de la clé secrète utilisée par l'algorithme symétrique.Represents the size, in bits, of the secret key used by the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
KeyValue KeyValue KeyValue KeyValue

Représente la clé secrète pour l'algorithme symétrique.Represents the secret key for the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
LegalBlockSizesValue LegalBlockSizesValue LegalBlockSizesValue LegalBlockSizesValue

Spécifie les tailles de bloc, en octets, prises en charge par l'algorithme symétrique.Specifies the block sizes, in bits, that are supported by the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
LegalKeySizesValue LegalKeySizesValue LegalKeySizesValue LegalKeySizesValue

Spécifie les tailles de clé, en octets, prises en charge par l'algorithme symétrique.Specifies the key sizes, in bits, that are supported by the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
ModeValue ModeValue ModeValue ModeValue

Représente le mode de chiffrement utilisé dans l'algorithme symétrique.Represents the cipher mode used in the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
PaddingValue PaddingValue PaddingValue PaddingValue

Représente le mode de remplissage utilisé dans l'algorithme symétrique.Represents the padding mode used in the symmetric algorithm.

(Inherited from SymmetricAlgorithm)

Implémentations d’interfaces explicites

IDisposable.Dispose() IDisposable.Dispose() IDisposable.Dispose() IDisposable.Dispose()

Libère les ressources non managées utilisées par SymmetricAlgorithm et libère éventuellement les ressources managées.Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(Inherited from SymmetricAlgorithm)

S’applique à

Voir aussi