ProtectedMemory 類別

定義

命名空間:

System.Security.Cryptography

組件:

System.Security.dll

提供保護和解除記憶體保護的方法。 此類別無法獲得繼承。

public ref class ProtectedMemory abstract sealed

public static class ProtectedMemory

type ProtectedMemory = class

Public Class ProtectedMemory

繼承

Object

ProtectedMemory

範例

下列範例示範如何使用數據保護。

#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

這個類別可讓您存取 Windows XP 和更新版本的作業系統中提供的數據保護 API (DPAPI) 。 這是操作系統所提供的服務，不需要額外的連結庫。 它會為記憶體中的敏感數據提供加密。

類別是由 Unmanaged DPAPI Protect 和 Unprotect的兩個包裝函式所組成。 這兩種方法可用來加密和解密記憶體中的數據。

方法

Protect(Byte[], MemoryProtectionScope)	保護指定的資料。
Unprotect(Byte[], MemoryProtectionScope)	解除保護記憶體中使用 Protect(Byte[], MemoryProtectionScope) 方法所保護的資料。