ProtectedData.Unprotect(Byte[], Byte[], DataProtectionScope) Método
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Descifra los datos de una matriz de bytes especificada y devuelve una matriz de bytes que contiene los datos descifrados.
public:
static cli::array <System::Byte> ^ Unprotect(cli::array <System::Byte> ^ encryptedData, cli::array <System::Byte> ^ optionalEntropy, System::Security::Cryptography::DataProtectionScope scope);
public static byte[] Unprotect (byte[] encryptedData, byte[]? optionalEntropy, System.Security.Cryptography.DataProtectionScope scope);
public static byte[] Unprotect (byte[] encryptedData, byte[] optionalEntropy, System.Security.Cryptography.DataProtectionScope scope);
static member Unprotect : byte[] * byte[] * System.Security.Cryptography.DataProtectionScope -> byte[]
Public Shared Function Unprotect (encryptedData As Byte(), optionalEntropy As Byte(), scope As DataProtectionScope) As Byte()
- encryptedData
- Byte[]
Una matriz de bytes que contiene datos cifrados mediante el método Protect(Byte[], Byte[], DataProtectionScope).
- optionalEntropy
- Byte[]
Una matriz de bytes adicional opcional que fue utilizada para cifrar los datos o null
si no se utilizara la matriz de bytes adicional.
- scope
- DataProtectionScope
Uno de los valores de enumeración que especifica el ámbito de protección de datos que se uso para cifrar los datos.
Matriz de bytes que representa los datos descifrados.
El parámetro encryptedData
es null
.
Se produjo un error en el descifrado.
El sistema operativo no admite este método.
Memoria insuficiente
Solo .NET Core y .NET 5+: las llamadas al Unprotect
método solo se admiten en sistemas operativos Windows.
En el ejemplo de código siguiente se muestra cómo usar la protección de datos.
#using <System.Security.dll>
using namespace System;
using namespace System::Security::Cryptography;
public ref class DataProtectionSample
{
private:
// Create byte array for additional entropy when using Protect method.
static array<Byte>^s_additionalEntropy = {9,8,7,6,5};
public:
static void Main()
{
// Create a simple byte array containing data to be encrypted.
array<Byte>^secret = {0,1,2,3,4,1,2,3,4};
//Encrypt the data.
array<Byte>^encryptedSecret = Protect( secret );
Console::WriteLine( "The encrypted byte array is:" );
PrintValues( encryptedSecret );
// Decrypt the data and store in a byte array.
array<Byte>^originalData = Unprotect( encryptedSecret );
Console::WriteLine( "{0}The original data is:", Environment::NewLine );
PrintValues( originalData );
}
static array<Byte>^ Protect( array<Byte>^data )
{
try
{
// Encrypt the data using DataProtectionScope.CurrentUser. The result can be decrypted
// only by the same current user.
return ProtectedData::Protect( data, s_additionalEntropy, DataProtectionScope::CurrentUser );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( "Data was not encrypted. An error occurred." );
Console::WriteLine( e );
return nullptr;
}
}
static array<Byte>^ Unprotect( array<Byte>^data )
{
try
{
//Decrypt the data using DataProtectionScope.CurrentUser.
return ProtectedData::Unprotect( data, s_additionalEntropy, DataProtectionScope::CurrentUser );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( "Data was not decrypted. An error occurred." );
Console::WriteLine( e );
return nullptr;
}
}
static void PrintValues( array<Byte>^myArr )
{
System::Collections::IEnumerator^ myEnum = myArr->GetEnumerator();
while ( myEnum->MoveNext() )
{
Byte i = safe_cast<Byte>(myEnum->Current);
Console::Write( "\t{0}", i );
}
Console::WriteLine();
}
};
int main()
{
DataProtectionSample::Main();
}
using System;
using System.Security.Cryptography;
public class DataProtectionSample
{
// Create byte array for additional entropy when using Protect method.
static byte [] s_additionalEntropy = { 9, 8, 7, 6, 5 };
public static void Main()
{
// Create a simple byte array containing data to be encrypted.
byte [] secret = { 0, 1, 2, 3, 4, 1, 2, 3, 4 };
//Encrypt the data.
byte [] encryptedSecret = Protect( secret );
Console.WriteLine("The encrypted byte array is:");
PrintValues(encryptedSecret);
// Decrypt the data and store in a byte array.
byte [] originalData = Unprotect( encryptedSecret );
Console.WriteLine("{0}The original data is:", Environment.NewLine);
PrintValues(originalData);
}
public static byte [] Protect( byte [] data )
{
try
{
// Encrypt the data using DataProtectionScope.CurrentUser. The result can be decrypted
// only by the same current user.
return ProtectedData.Protect( data, s_additionalEntropy, DataProtectionScope.CurrentUser );
}
catch (CryptographicException e)
{
Console.WriteLine("Data was not encrypted. An error occurred.");
Console.WriteLine(e.ToString());
return null;
}
}
public static byte [] Unprotect( byte [] data )
{
try
{
//Decrypt the data using DataProtectionScope.CurrentUser.
return ProtectedData.Unprotect( data, s_additionalEntropy, DataProtectionScope.CurrentUser );
}
catch (CryptographicException e)
{
Console.WriteLine("Data was not decrypted. An error occurred.");
Console.WriteLine(e.ToString());
return null;
}
}
public static void PrintValues( Byte[] myArr )
{
foreach ( Byte i in myArr )
{
Console.Write( "\t{0}", i );
}
Console.WriteLine();
}
}
Imports System.Security.Cryptography
Public Class DataProtectionSample
' Create byte array for additional entropy when using Protect method.
Private Shared s_additionalEntropy As Byte() = {9, 8, 7, 6, 5}
Public Shared Sub Main()
' Create a simple byte array containing data to be encrypted.
Dim secret As Byte() = {0, 1, 2, 3, 4, 1, 2, 3, 4}
'Encrypt the data.
Dim encryptedSecret As Byte() = Protect(secret)
Console.WriteLine("The encrypted byte array is:")
PrintValues(encryptedSecret)
' Decrypt the data and store in a byte array.
Dim originalData As Byte() = Unprotect(encryptedSecret)
Console.WriteLine("{0}The original data is:", Environment.NewLine)
PrintValues(originalData)
End Sub
Public Shared Function Protect(ByVal data() As Byte) As Byte()
Try
' Encrypt the data using DataProtectionScope.CurrentUser. The result can be decrypted
' only by the same current user.
Return ProtectedData.Protect(data, s_additionalEntropy, DataProtectionScope.CurrentUser)
Catch e As CryptographicException
Console.WriteLine("Data was not encrypted. An error occurred.")
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
Public Shared Function Unprotect(ByVal data() As Byte) As Byte()
Try
'Decrypt the data using DataProtectionScope.CurrentUser.
Return ProtectedData.Unprotect(data, s_additionalEntropy, DataProtectionScope.CurrentUser)
Catch e As CryptographicException
Console.WriteLine("Data was not decrypted. An error occurred.")
Console.WriteLine(e.ToString())
Return Nothing
End Try
End Function
Public Shared Sub PrintValues(ByVal myArr() As [Byte])
Dim i As [Byte]
For Each i In myArr
Console.Write(vbTab + "{0}", i)
Next i
Console.WriteLine()
End Sub
End Class
Este método se puede usar para desproteger datos cifrados mediante el Protect método . Si el parámetro se usó durante el optionalEntropy
cifrado, se debe proporcionar para descifrar los datos.
Nota
Si usa este método durante la suplantación, puede recibir el siguiente error: "La clave no es válida para su uso en el estado especificado". Para evitar este error, cargue el perfil del usuario que desea suplantar antes de llamar al método .
Producto | Versiones |
---|---|
.NET | Core 1.0, Core 1.1, 8 (package-provided), 9 (package-provided) |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1 |
.NET Standard | 2.0 (package-provided) |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
Comentarios de .NET
.NET es un proyecto de código abierto. Seleccione un vínculo para proporcionar comentarios: