ProtectedMemory.Unprotect(Byte[], MemoryProtectionScope) Metodo

Definizione

Rimuove la protezione dei dati in memoria precedentemente protetti tramite il metodo Protect(Byte[], MemoryProtectionScope).Unprotects data in memory that was protected using the Protect(Byte[], MemoryProtectionScope) method.

public:
 static void Unprotect(cli::array <System::Byte> ^ encryptedData, System::Security::Cryptography::MemoryProtectionScope scope);
public static void Unprotect (byte[] encryptedData, System.Security.Cryptography.MemoryProtectionScope scope);
static member Unprotect : byte[] * System.Security.Cryptography.MemoryProtectionScope -> unit
Public Shared Sub Unprotect (encryptedData As Byte(), scope As MemoryProtectionScope)

Parametri

encryptedData
Byte[]

Matrice di byte in memoria da decrittografare.The byte array in memory to unencrypt.

scope
MemoryProtectionScope

Uno dei valori di enumerazione che specifica l'ambito di protezione della memoria.One of the enumeration values that specifies the scope of memory protection.

Eccezioni

Il sistema operativo non supporta questo metodo,The operating system does not support this method. Questo metodo può essere utilizzato esclusivamente in Windows 2000 o nei sistemi operativi successivi.This method can be used only with the Windows 2000 or later operating systems.

encryptedData è null.encryptedData is null.

encryptedData è vuoto.encryptedData is empty.

-oppure--or- Questa chiamata non è stata implementata.This call was not implemented.

-oppure--or- NTSTATUS contiene un errore.NTSTATUS contains an error.

Esempio

Nell'esempio seguente viene illustrato come utilizzare la protezione dei dati.The following example shows how to use data protection.

#using <System.Security.dll>

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

int main()
{
   
   // Create the original data to be encrypted (The data length should be a multiple of 16).
   array<Byte>^secret = {1,2,3,4,1,2,3,4,1,2,3,4,1,2,3,4};
   
   // Encrypt the data in memory. The result is stored in the same array as the original data.
   ProtectedMemory::Protect( secret, MemoryProtectionScope::SameLogon );
   
   // Decrypt the data in memory and store in the original array.
   ProtectedMemory::Unprotect( secret, MemoryProtectionScope::SameLogon );
}
using System;
using System.Security.Cryptography;

public class MemoryProtectionSample
{

    public static void Main()
    {
        // Create the original data to be encrypted (The data length should be a multiple of 16).
        byte [] secret = { 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4 };

        // Encrypt the data in memory. The result is stored in the same array as the original data.
        ProtectedMemory.Protect( secret, MemoryProtectionScope.SameLogon );

        // Decrypt the data in memory and store in the original array.
        ProtectedMemory.Unprotect( secret, MemoryProtectionScope.SameLogon );
    }
}
Imports System.Security.Cryptography

Public Class MemoryProtectionSample

    Public Shared Sub Main()
        ' Create the original data to be encrypted (The data length should be a multiple of 16).
        Dim secret As Byte() = {1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4}

        ' Encrypt the data in memory. The result is stored in the same array as the original data.
        ProtectedMemory.Protect(secret, MemoryProtectionScope.SameLogon)

        ' Decrypt the data in memory and store in the original array.
        ProtectedMemory.Unprotect(secret, MemoryProtectionScope.SameLogon)

    End Sub
End Class

Commenti

Questo metodo può essere utilizzato per decrittografare i dati in memoria crittografati tramite il Protect metodo.This method can be used to unencrypt data in memory that was encrypted using the Protect method.

Il supporto per questo metodo è disponibile nei sistemi operativi Windows XP e versioni successive.Support for this method is available in the Windows XP and later operating systems.

Si applica a