ProtectedMemory.Protect(Byte[], MemoryProtectionScope) 方法

定義

命名空間:

System.Security.Cryptography

組件:

System.Security.dll

保護指定的資料。

public:
 static void Protect(cli::array <System::Byte> ^ userData, System::Security::Cryptography::MemoryProtectionScope scope);

public static void Protect (byte[] userData, System.Security.Cryptography.MemoryProtectionScope scope);

static member Protect : byte[] * System.Security.Cryptography.MemoryProtectionScope -> unit

Public Shared Sub Protect (userData As Byte(), scope As MemoryProtectionScope)

參數

userData

Byte[]

內含記憶體中要保護的資料之位元組陣列。 此陣列必須是 16 個位元組的倍數。

scope

MemoryProtectionScope

其中一個列舉值，指定記憶體保護的範圍。

例外狀況

CryptographicException

userData 的長度必須是 16 個位元組或 16 位個元組的倍數。

NotSupportedException

本作業系統不支援這個方法。 這個方法只有 Windows 2000 (含) 以後版本的作業系統才能夠使用。

ArgumentNullException

userData 為 null。

範例

下列程式碼範例示範如何使用資料保護。

#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

備註

這個方法可用來保護記憶體中的資料。 請注意，方法不會複製資料，而是會就地加密位元組陣列。 參數 userData 的長度必須是 16 個位元組，或是 16 個位元組的倍數。

Windows XP 和更新版本的作業系統提供此方法的支援。