Aes Clase

Definición

Representa la clase base abstracta de la que deben heredar todas las implementaciones del Estándar de cifrado avanzado (AES).Represents the abstract base class from which all implementations of the Advanced Encryption Standard (AES) must inherit.

public ref class Aes abstract : System::Security::Cryptography::SymmetricAlgorithm
public abstract class Aes : System.Security.Cryptography.SymmetricAlgorithm
type Aes = class
    inherit SymmetricAlgorithm
Public MustInherit Class Aes
Inherits SymmetricAlgorithm
Herencia
Derivado

Ejemplos

En el ejemplo siguiente se muestra cómo cifrar y descifrar datos de ejemplo mediante la Aes clase.The following example demonstrates how to encrypt and decrypt sample data by using the Aes 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 Aes
            // class.  This generates a new key and initialization
            // vector (IV).
            using (Aes myAes = Aes.Create())
            {

                // 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 Aes object
            // with the specified key and IV.
            using (Aes aesAlg = Aes.Create())
            {
                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 Aes object
            // with the specified key and IV.
            using (Aes aesAlg = Aes.Create())
            {
                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 Aes
        ' class.  This generates a new key and initialization 
        ' vector (IV).
        Using myAes As Aes = Aes.Create()
            ' 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

    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 Aes object
        ' with the specified key and IV.
        Using aesAlg As Aes = Aes.Create()

            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.
            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_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 Aes object
        ' with the specified key and IV.
        Using aesAlg As Aes = Aes.Create()
            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
open System
open System.IO
open System.Security.Cryptography

let encryptStringToBytes_Aes (plainText: string, key : byte[], iv : byte[]) : byte[] =

    // Check arguments.
    if (isNull plainText || plainText.Length <= 0) then nullArg "plainText"
    if (isNull key || key.Length <= 0) then nullArg "key"
    if (isNull iv || iv.Length <= 0) then nullArg "iv"
    
    // Create an Aes object
    // with the specified key and IV.
    use aesAlg = Aes.Create()
    aesAlg.Key <- key
    aesAlg.IV <- iv

    // Create an encryptor to perform the stream transform.
    let encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV)

    // Create the streams used for encryption.
    use msEncrypt = new MemoryStream()
    use csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)
    use swEncrypt = new StreamWriter(csEncrypt)
    
    //Write all data to the stream.
    swEncrypt.Write(plainText)
    swEncrypt.Flush()
    
    // Return the encrypted bytes from the memory stream.
    msEncrypt.ToArray()

let decryptStringFromBytes_Aes (cipherText : byte[], key : byte[], iv : byte[]) : string =

    // Check arguments.
    if (isNull cipherText || cipherText.Length <= 0) then nullArg "cipherText"
    if (isNull key || key.Length <= 0) then nullArg "key"
    if (isNull iv || iv.Length <= 0) then nullArg "iv"

    // Create an Aes object
    // with the specified key and IV.
    use aesAlg = Aes.Create()
    aesAlg.Key <- key
    aesAlg.IV <- iv

    // Create a decryptor to perform the stream transform.
    let decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV)

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

    // Read the decrypted bytes from the decrypting stream
    // and return the resulting string.
    srDecrypt.ReadToEnd()

[<EntryPoint>]
let main argv = 

    let original = "Here is some data to encrypt!"

    // Create a new instance of the Aes
    // class.  This generates a new key and initialization 
    // vector (IV).
    use myAes = Aes.Create()

    // Encrypt the string to an array of bytes.
    let encrypted = encryptStringToBytes_Aes(original, myAes.Key, myAes.IV)

    // Decrypt the bytes to a string.
    let 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)
    0

Constructores

Aes()

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

Campos

BlockSizeValue

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

(Heredado de SymmetricAlgorithm)
FeedbackSizeValue

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

(Heredado de SymmetricAlgorithm)
IVValue

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

(Heredado de SymmetricAlgorithm)
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.

(Heredado de SymmetricAlgorithm)
KeyValue

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

(Heredado de SymmetricAlgorithm)
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.

(Heredado de SymmetricAlgorithm)
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.

(Heredado de SymmetricAlgorithm)
ModeValue

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

(Heredado de SymmetricAlgorithm)
PaddingValue

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

(Heredado de SymmetricAlgorithm)

Propiedades

BlockSize

Obtiene o establece el tamaño del bloque de la operación criptográfica en bits.Gets or sets the block size, in bits, of the cryptographic operation.

(Heredado de SymmetricAlgorithm)
FeedbackSize

Obtiene o establece el tamaño de los comentarios, en bits, de la operación criptográfica de los modos de cifrado Comentarios de cifrado (CFB) y Comentarios de salida (OFB).Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes.

(Heredado de SymmetricAlgorithm)
IV

Obtiene o establece el vector de inicialización (IV) del algoritmo simétrico.Gets or sets the initialization vector (IV) for the symmetric algorithm.

(Heredado de SymmetricAlgorithm)
Key

Obtiene o establece la clave secreta del algoritmo simétrico.Gets or sets the secret key for the symmetric algorithm.

(Heredado de SymmetricAlgorithm)
KeySize

Obtiene o establece el tamaño de la clave secreta utilizada por el algoritmo simétrico en bits.Gets or sets the size, in bits, of the secret key used by the symmetric algorithm.

(Heredado de SymmetricAlgorithm)
LegalBlockSizes

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

LegalBlockSizes

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

(Heredado de SymmetricAlgorithm)
LegalKeySizes

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

LegalKeySizes

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

(Heredado de SymmetricAlgorithm)
Mode

Obtiene o establece el modo de funcionamiento del algoritmo simétrico.Gets or sets the mode for operation of the symmetric algorithm.

(Heredado de SymmetricAlgorithm)
Padding

Obtiene o establece el modo de relleno usado en el algoritmo simétrico.Gets or sets the padding mode used in the symmetric algorithm.

(Heredado de SymmetricAlgorithm)

Métodos

Clear()

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

(Heredado de SymmetricAlgorithm)
Create()

Crea un objeto criptográfico que se usa para realizar el algoritmo simétrico.Creates a cryptographic object that is used to perform the symmetric algorithm.

Create(String)

Crea un objeto criptográfico que especifica la implementación de AES que se usará para realizar el algoritmo simétrico.Creates a cryptographic object that specifies the implementation of AES to use to perform the symmetric algorithm.

CreateDecryptor()

Crea un objeto descifrador simétrico con la propiedad Key y el vector de inicialización (IV) actuales.Creates a symmetric decryptor object with the current Key property and initialization vector (IV).

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

Cuando se invalida en una clase derivada, crea un objeto descifrador simétrico con la propiedad Key y el vector de inicialización (IV) especificados.When overridden in a derived class, creates a symmetric decryptor object with the specified Key property and initialization vector (IV).

(Heredado de SymmetricAlgorithm)
CreateEncryptor()

Crea un objeto descifrador simétrico con la propiedad Key y el vector de inicialización (IV) actuales.Creates a symmetric encryptor object with the current Key property and initialization vector (IV).

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

Cuando se invalida en una clase derivada, se crea un objeto descifrador simétrico con la propiedad Key y el vector de inicialización (IV) especificados.When overridden in a derived class, creates a symmetric encryptor object with the specified Key property and initialization vector (IV).

(Heredado de SymmetricAlgorithm)
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.

(Heredado de SymmetricAlgorithm)
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.

(Heredado de SymmetricAlgorithm)
Equals(Object)

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

(Heredado de Object)
GenerateIV()

Cuando se invalida en una clase derivada, genera un vector de inicialización aleatorio (IV), que se usa para el algoritmo.When overridden in a derived class, generates a random initialization vector (IV) to use for the algorithm.

(Heredado de SymmetricAlgorithm)
GenerateKey()

Cuando se invalida en una clase derivada, genera una clave aleatoria (Key), que se usa para el algoritmo.When overridden in a derived class, generates a random key (Key) to use for the algorithm.

(Heredado de SymmetricAlgorithm)
GetHashCode()

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

(Heredado de Object)
GetType()

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

(Heredado de Object)
MemberwiseClone()

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

(Heredado de Object)
ToString()

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

(Heredado de Object)
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.

(Heredado de SymmetricAlgorithm)

Implementaciones de interfaz explícitas

IDisposable.Dispose()

Esta API admite la infraestructura de producto y no está pensada para usarse directamente en el código.

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.

(Heredado de SymmetricAlgorithm)

Se aplica a