ProtectedMemory.Unprotect(Byte[], MemoryProtectionScope) Metode

Definisi

Ruang nama:

System.Security.Cryptography

Rakitan:

System.Security.dll

Membatalkan perlindungan data dalam memori yang dilindungi menggunakan metode .Protect(Byte[], MemoryProtectionScope)

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)

Parameter

encryptedData

Byte[]

Array byte dalam memori untuk tidak terenkripsi.

scope

MemoryProtectionScope

Salah satu nilai enumerasi yang menentukan cakupan perlindungan memori.

Pengecualian

NotSupportedException

Sistem operasi tidak mendukung metode ini. Metode ini hanya dapat digunakan dengan sistem operasi Windows 2000 atau yang lebih baru.

ArgumentNullException

encryptedDataadalah null.

CryptographicException

encryptedData kosong.

-atau-

Panggilan ini tidak diimplementasikan.

-atau-

NTSTATUS berisi kesalahan.

Contoh

Contoh berikut menunjukkan cara menggunakan perlindungan data.

#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

Keterangan

Metode ini dapat digunakan untuk tidak mendekripsi data dalam memori yang dienkripsi menggunakan Protect metode .

Dukungan untuk metode ini tersedia di Windows XP dan sistem operasi yang lebih baru.