ProtectedMemory 类

定义

命名空间:

System.Security.Cryptography

程序集:

System.Security.dll

提供保护内存和取消内存保护的方法。 此类不能被继承。

public ref class ProtectedMemory abstract sealed

public static class ProtectedMemory

type ProtectedMemory = class

Public Class ProtectedMemory

继承

Object

ProtectedMemory

示例

以下示例演示如何使用数据保护。

#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

注解

此类提供对 Windows XP 及更高版本操作系统中提供的数据保护 API (DPAPI) 的访问权限。 这是操作系统提供的一项服务，不需要其他库。 它为内存中的敏感数据提供加密。

类由非托管 DPAPI Protect 和 Unprotect的两个包装器组成。 这两种方法可用于加密和解密内存中的数据。

方法

Protect(Byte[], MemoryProtectionScope)	保护指定数据。
Unprotect(Byte[], MemoryProtectionScope)	取消对使用 Protect(Byte[], MemoryProtectionScope) 方法保护的内存中的数据的保护。