AesCryptoServiceProvider AesCryptoServiceProvider AesCryptoServiceProvider AesCryptoServiceProvider Class

Definición

Realiza el cifrado y descifrado simétricos mediante la implementación de interfaces de programación de aplicaciones criptográficas (CAPI) del algoritmo del estándar de cifrado avanzado (AES). Performs symmetric encryption and decryption using the Cryptographic Application Programming Interfaces (CAPI) implementation of the Advanced Encryption Standard (AES) algorithm.

public ref class AesCryptoServiceProvider sealed : System::Security::Cryptography::Aes
public sealed class AesCryptoServiceProvider : System.Security.Cryptography.Aes
type AesCryptoServiceProvider = class
    inherit Aes
Public NotInheritable Class AesCryptoServiceProvider
Inherits Aes
Herencia
AesCryptoServiceProviderAesCryptoServiceProviderAesCryptoServiceProviderAesCryptoServiceProvider

Ejemplos

En el ejemplo siguiente se muestra cómo cifrar y descifrar los datos de ejemplo mediante el AesCryptoServiceProvider clase.The following example demonstrates how to encrypt and decrypt sample data using the AesCryptoServiceProvider class.

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

namespace Aes_Example
{
    class AesExample
    {
        public static void Main()
        {
            string original = "Here is some data to encrypt!";

            // Create a new instance of the AesCryptoServiceProvider
            // class.  This generates a new key and initialization 
            // vector (IV).
            using (AesCryptoServiceProvider myAes = new AesCryptoServiceProvider())
            {
                // Encrypt the string to an array of bytes.
                byte[] encrypted = EncryptStringToBytes_Aes(original, myAes.Key, myAes.IV);

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

                //Display the original data and the decrypted data.
                Console.WriteLine("Original:   {0}", original);
                Console.WriteLine("Round Trip: {0}", roundtrip);
            }
        }
        static byte[] EncryptStringToBytes_Aes(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 AesCryptoServiceProvider object
            // with the specified key and IV.
            using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
            {
                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.
                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_Aes(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 AesCryptoServiceProvider object
            // with the specified key and IV.
            using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
            {
                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.
                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 AesExample

    Public Shared Sub Main()
        Dim original As String = "Here is some data to encrypt!"

        ' Create a new instance of the AesCryptoServiceProvider
        ' class.  This generates a new key and initialization 
        ' vector (IV).
        Using myAes As New AesCryptoServiceProvider()

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

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

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

    End Sub 'Main

    Shared Function EncryptStringToBytes_Aes(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 AesCryptoServiceProvider object
        ' with the specified key and IV.
        Using aesAlg As New AesCryptoServiceProvider()

            aesAlg.Key = Key
            aesAlg.IV = IV

            ' Create an encryptor to perform the stream transform.
            Dim encryptor As ICryptoTransform = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV)

            ' Create the streams used for encryption.
            Dim 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

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

    End Function 'EncryptStringToBytes_Aes

    Shared Function DecryptStringFromBytes_Aes(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 AesCryptoServiceProvider object
        ' with the specified key and IV.
        Using aesAlg As New AesCryptoServiceProvider()

            aesAlg.Key = Key
            aesAlg.IV = IV

            ' Create a decryptor to perform the stream transform.
            Dim decryptor As ICryptoTransform = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.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_Aes 
End Class 'AesExample

Constructores

AesCryptoServiceProvider() AesCryptoServiceProvider() AesCryptoServiceProvider() AesCryptoServiceProvider()

Inicializa una nueva instancia de la clase AesCryptoServiceProvider. Initializes a new instance of the AesCryptoServiceProvider class.

Propiedades

BlockSize BlockSize BlockSize BlockSize
FeedbackSize FeedbackSize FeedbackSize FeedbackSize
IV IV IV IV
Key Key Key Key

Obtiene o establece la clave simétrica que se utiliza para el cifrado y descifrado. Gets or sets the symmetric key that is used for encryption and decryption.

KeySize KeySize KeySize KeySize

Obtiene o establece el tamaño, en bits, de la clave secreta. Gets or sets the size, in bits, of the secret key.

LegalBlockSizes LegalBlockSizes LegalBlockSizes LegalBlockSizes
LegalKeySizes LegalKeySizes LegalKeySizes LegalKeySizes
Mode Mode Mode Mode
Padding Padding Padding Padding

Métodos

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

Libera todos los recursos que utiliza la clase SymmetricAlgorithm. Releases all resources used by the SymmetricAlgorithm class.

(Inherited from SymmetricAlgorithm)
CreateDecryptor() CreateDecryptor() CreateDecryptor() CreateDecryptor()

Crea un objeto descifrador AES simétrico que utiliza la clave y el vector de inicialización (IV) actuales. Creates a symmetric AES decryptor object using the current key and initialization vector (IV).

CreateDecryptor(Byte[], Byte[]) CreateDecryptor(Byte[], Byte[]) CreateDecryptor(Byte[], Byte[]) CreateDecryptor(Byte[], Byte[])

Crea un objeto descifrador AES simétrico que utiliza la clave y el vector de inicialización (IV) especificados. Creates a symmetric AES decryptor object using the specified key and initialization vector (IV).

CreateEncryptor() CreateEncryptor() CreateEncryptor() CreateEncryptor()

Crea un objeto cifrador AES simétrico que utiliza la clave y el vector de inicialización (IV) actuales. Creates a symmetric AES encryptor object using the current key and initialization vector (IV).

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

Crea un objeto cifrador simétrico que utiliza la clave y el vector de inicialización (IV) especificados. Creates a symmetric encryptor object using the specified key and initialization vector (IV).

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

Libera todos los recursos usados por la instancia actual de la clase SymmetricAlgorithm. Releases all resources used by the current instance of the SymmetricAlgorithm class.

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

Libera los recursos no administrados que usa SymmetricAlgorithm y, de forma opcional, libera los recursos administrados. 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)

Determina si el objeto especificado es igual al objeto actual. Determines whether the specified object is equal to the current object.

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

Genera un vector de inicialización aleatorio (IV) que se va a utilizar para el algoritmo. Generates a random initialization vector (IV) to use for the algorithm.

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

Genera una clave aleatoria que se utiliza para el algoritmo. Generates a random key to use for the algorithm.

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

Sirve como la función hash predeterminada. Serves as the default hash function.

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

Obtiene el Type de la instancia actual. Gets the Type of the current instance.

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

Crea una copia superficial del Object actual. Creates a shallow copy of the current Object.

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

Devuelve una cadena que representa el objeto actual. Returns a string that represents the current object.

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

Determina si el tamaño de clave especificado es válido para el algoritmo actual. Determines whether the specified key size is valid for the current algorithm.

(Inherited from SymmetricAlgorithm)

Campos

BlockSizeValue BlockSizeValue BlockSizeValue BlockSizeValue

Representa el tamaño del bloque de la operación criptográfica en bits. Represents the block size, in bits, of the cryptographic operation.

(Inherited from SymmetricAlgorithm)
FeedbackSizeValue FeedbackSizeValue FeedbackSizeValue FeedbackSizeValue

Representa el tamaño de respuesta de la operación criptográfica en bits. Represents the feedback size, in bits, of the cryptographic operation.

(Inherited from SymmetricAlgorithm)
IVValue IVValue IVValue IVValue

Representa el vector de inicialización (IV) del algoritmo simétrico. Represents the initialization vector (IV) for the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
KeySizeValue KeySizeValue KeySizeValue KeySizeValue

Representa el tamaño en bits de la clave secreta que usa el algoritmo simétrico. Represents the size, in bits, of the secret key used by the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
KeyValue KeyValue KeyValue KeyValue

Representa la clave secreta del algoritmo simétrico. Represents the secret key for the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
LegalBlockSizesValue LegalBlockSizesValue LegalBlockSizesValue LegalBlockSizesValue

Especifica los tamaños de bloque, en bits, admitidos por el algoritmo simétrico. Specifies the block sizes, in bits, that are supported by the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
LegalKeySizesValue LegalKeySizesValue LegalKeySizesValue LegalKeySizesValue

Especifica los tamaños de clave, en bits, admitidos por el algoritmo simétrico. Specifies the key sizes, in bits, that are supported by the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
ModeValue ModeValue ModeValue ModeValue

Representa el modo de cifrado usado en el algoritmo simétrico. Represents the cipher mode used in the symmetric algorithm.

(Inherited from SymmetricAlgorithm)
PaddingValue PaddingValue PaddingValue PaddingValue

Representa el modo de relleno usado en el algoritmo simétrico. Represents the padding mode used in the symmetric algorithm.

(Inherited from SymmetricAlgorithm)

Implementaciones de interfaz explícitas

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

Libera los recursos no administrados que usa SymmetricAlgorithm y, de forma opcional, libera los recursos administrados. Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(Inherited from SymmetricAlgorithm)

Se aplica a