RijndaelManaged Classe

Definição

Acessa a versão gerenciada do algoritmo Rijndael.Accesses the managed version of the Rijndael algorithm. Essa classe não pode ser herdada.This class cannot be inherited.

public ref class RijndaelManaged sealed : System::Security::Cryptography::Rijndael
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public sealed class RijndaelManaged : System.Security.Cryptography.Rijndael
public sealed class RijndaelManaged : System.Security.Cryptography.Rijndael
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class RijndaelManaged : System.Security.Cryptography.Rijndael
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
type RijndaelManaged = class
    inherit Rijndael
type RijndaelManaged = class
    inherit Rijndael
[<System.Runtime.InteropServices.ComVisible(true)>]
type RijndaelManaged = class
    inherit Rijndael
Public NotInheritable Class RijndaelManaged
Inherits Rijndael
Herança
Atributos

Exemplos

O exemplo a seguir demonstra como criptografar e descriptografar dados de exemplo usando a 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.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

    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

Comentários

Este algoritmo dá suporte a comprimentos de chave de 128, 192 ou 256 bits; Padronizando para 256 bits.This algorithm supports key lengths of 128, 192, or 256 bits; defaulting to 256 bits. Em .NET Framework, esse algoritmo oferece suporte a tamanhos de bloco de 128, 192 ou 256 bits; Padronizando para 128 bits ( Aes compatível).In .NET Framework, this algorithm supports block sizes of 128, 192, or 256 bits; defaulting to 128 bits (Aes-compatible). No .NET Core, ele é o mesmo que o AES e dá suporte apenas a um tamanho de bloco de 128 bits.In .NET Core, it is the same as AES and supports only a 128-bit block size.

Importante

A Rijndael classe é a predecessora do Aes algoritmo.The Rijndael class is the predecessor of the Aes algorithm. Você deve usar o Aes algoritmo em vez de Rijndael .You should use the Aes algorithm instead of Rijndael. Para obter mais informações, consulte a entrada as diferenças entre o Rijndael e o AES no blog de segurança do .net.For more information, see the entry The Differences Between Rijndael and AES in the .NET Security blog.

Construtores

RijndaelManaged()

Inicializa uma nova instância da classe RijndaelManaged.Initializes a new instance of the RijndaelManaged class.

Campos

BlockSizeValue

Representa o tamanho do bloco, em bits, da operação criptográfica.Represents the block size, in bits, of the cryptographic operation.

(Herdado de SymmetricAlgorithm)
FeedbackSizeValue

Representa o tamanho dos comentários, em bits, da operação de criptografia.Represents the feedback size, in bits, of the cryptographic operation.

(Herdado de SymmetricAlgorithm)
IVValue

Representa o vetor de inicialização (IV) do algoritmo simétrico.Represents the initialization vector (IV) for the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
KeySizeValue

Representa o tamanho, em bits, da chave secreta usada pelo algoritmo simétrico.Represents the size, in bits, of the secret key used by the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
KeyValue

Representa a chave secreta para o algoritmo simétrico.Represents the secret key for the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
LegalBlockSizesValue

Especifica os tamanhos de bloco, em bits, que têm suporte pelo algoritmo simétrico.Specifies the block sizes, in bits, that are supported by the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
LegalKeySizesValue

Especifica os tamanhos de chave, em bits, que têm suporte pelo algoritmo simétrico.Specifies the key sizes, in bits, that are supported by the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
ModeValue

Representa o modo de criptografia usado no algoritmo simétrico.Represents the cipher mode used in the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
PaddingValue

Representa o modo de preenchimento usado no algoritmo simétrico.Represents the padding mode used in the symmetric algorithm.

(Herdado de SymmetricAlgorithm)

Propriedades

BlockSize

Obtém ou define o tamanho do bloco, em bits, da operação de criptografia.Gets or sets the block size, in bits, of the cryptographic operation.

BlockSize

Obtém ou define o tamanho do bloco, em bits, da operação de criptografia.Gets or sets the block size, in bits, of the cryptographic operation.

(Herdado de SymmetricAlgorithm)
FeedbackSize

Obtém ou define o tamanho dos comentários, em bits, da operação de criptografia para os modos de codificação CFB (Comentário de Codificação) e OFB (Comentário de Saída).Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes.

(Herdado de SymmetricAlgorithm)
IV

Obtém ou define o VI (vetor de inicialização) a ser usado para o algoritmo simétrico.Gets or sets the initialization vector (IV) to use for the symmetric algorithm.

IV

Obtém ou define o vetor de inicialização (IV) para o algoritmo simétrico.Gets or sets the initialization vector (IV) for the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
Key

Obtém ou define a chave secreta usada para o algoritmo simétrico.Gets or sets the secret key used for the symmetric algorithm.

Key

Obtém ou define a chave secreta para o algoritmo simétrico.Gets or sets the secret key for the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
KeySize

Obtém ou define o tamanho, em bits, da chave secreta usada para o algoritmo simétrico.Gets or sets the size, in bits, of the secret key used for the symmetric algorithm.

KeySize

Obtém ou define o tamanho, em bits, da chave secreta usada pelo algoritmo simétrico.Gets or sets the size, in bits, of the secret key used by the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
LegalBlockSizes

Obtém os tamanhos de bloco, em bits, que tem suporte com o algoritmo simétrico.Gets the block sizes, in bits, that are supported by the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
LegalKeySizes

Obtém os tamanhos de chave, em bits, que têm suporte pelo algoritmo simétrico.Gets the key sizes, in bits, that are supported by the symmetric algorithm.

LegalKeySizes

Obtém os tamanhos de chave, em bits, que têm suporte pelo algoritmo simétrico.Gets the key sizes, in bits, that are supported by the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
Mode

Obtém ou define o modo de operação do algoritmo simétrico.Gets or sets the mode for operation of the symmetric algorithm.

Mode

Obtém ou define o modo de operação do algoritmo simétrico.Gets or sets the mode for operation of the symmetric algorithm.

(Herdado de SymmetricAlgorithm)
Padding

Obtém ou define o modo de preenchimento usado no algoritmo simétrico.Gets or sets the padding mode used in the symmetric algorithm.

Padding

Obtém ou define o modo de preenchimento usado no algoritmo simétrico.Gets or sets the padding mode used in the symmetric algorithm.

(Herdado de SymmetricAlgorithm)

Métodos

Clear()

Libera todos os recursos usados pela classe SymmetricAlgorithm.Releases all resources used by the SymmetricAlgorithm class.

(Herdado de SymmetricAlgorithm)
CreateDecryptor()

Cria um objeto descriptografador simétrico com a propriedade Key atual e o vetor de inicialização (IV).Creates a symmetric decryptor object with the current Key property and initialization vector (IV).

CreateDecryptor()

Cria um objeto descriptografador simétrico com a propriedade Key atual e o vetor de inicialização (IV).Creates a symmetric decryptor object with the current Key property and initialization vector (IV).

(Herdado de SymmetricAlgorithm)
CreateDecryptor(Byte[], Byte[])

Cria um objeto descriptografador Rijndael simétrico com o Key especificado e um vetor de inicialização (IV).Creates a symmetric Rijndael decryptor object with the specified Key and initialization vector (IV).

CreateEncryptor()

Cria um objeto criptografador simétrico com a propriedade Key atual e o vetor de inicialização (IV).Creates a symmetric encryptor object with the current Key property and initialization vector (IV).

CreateEncryptor()

Cria um objeto criptografador simétrico com a propriedade Key atual e o vetor de inicialização (IV).Creates a symmetric encryptor object with the current Key property and initialization vector (IV).

(Herdado de SymmetricAlgorithm)
CreateEncryptor(Byte[], Byte[])

Cria um objeto criptografador Rijndael simétrico com a Key atual e o vetor de inicialização (IV).Creates a symmetric Rijndael encryptor object with the specified Key and initialization vector (IV).

Dispose()

Libera todos os recursos usados pela instância atual da classe SymmetricAlgorithm.Releases all resources used by the current instance of the SymmetricAlgorithm class.

(Herdado de SymmetricAlgorithm)
Dispose(Boolean)

Libera os recursos não gerenciados usados pelo SymmetricAlgorithm e opcionalmente libera os recursos gerenciados.Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(Herdado de SymmetricAlgorithm)
Equals(Object)

Determina se o objeto especificado é igual ao objeto atual.Determines whether the specified object is equal to the current object.

(Herdado de Object)
GenerateIV()

Gera um vetor de inicialização aleatório (IV) a ser usado para o algoritmo.Generates a random initialization vector (IV) to be used for the algorithm.

GenerateKey()

Gera Key aleatórios a serem usados para o algoritmo.Generates a random Key to be used for the algorithm.

GetHashCode()

Serve como a função de hash padrão.Serves as the default hash function.

(Herdado de Object)
GetType()

Obtém o Type da instância atual.Gets the Type of the current instance.

(Herdado de Object)
MemberwiseClone()

Cria uma cópia superficial do Object atual.Creates a shallow copy of the current Object.

(Herdado de Object)
ToString()

Retorna uma cadeia de caracteres que representa o objeto atual.Returns a string that represents the current object.

(Herdado de Object)
ValidKeySize(Int32)

Determina se o tamanho da chave especificado é válido para o algoritmo atual.Determines whether the specified key size is valid for the current algorithm.

(Herdado de SymmetricAlgorithm)

Implantações explícitas de interface

IDisposable.Dispose()

Esta API dá suporte à infraestrutura do produto e não deve ser usada diretamente do seu código.

Libera os recursos não gerenciados usados pelo SymmetricAlgorithm e opcionalmente libera os recursos gerenciados.Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(Herdado de SymmetricAlgorithm)

Aplica-se a