ProtectedMemory.Protect Method
Assembly: System.Security (in system.security.dll)
'Declaration Public Shared Sub Protect ( _ userData As Byte(), _ scope As MemoryProtectionScope _ ) 'Usage Dim userData As Byte() Dim scope As MemoryProtectionScope ProtectedMemory.Protect(userData, scope)
public static void Protect ( byte[] userData, MemoryProtectionScope scope )
public static function Protect ( userData : byte[], scope : MemoryProtectionScope )
Not applicable.
Parameters
- userData
The byte array containing data in memory to protect. The array must be a multiple of 16 bytes.
- scope
One of the MemoryProtectionScope values.
This method can be used to protect data in memory. Note that the method does not make a copy of the data, but encrypts the byte array in place. The userData parameter must be 16 bytes in length or a multiple of 16 bytes.
Support for this method is available in Microsoft Windows XP and later operating systems.
The following code example shows how to use data protection.
Imports System Imports System.Security.Cryptography Public Class MemoryProtectionSample ' Create aditional entropy for use with the Protect method. Private Shared s_aditionalEntropy As Byte() = {9, 8, 7, 6, 5} 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 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
import System.*;
import System.Security.Cryptography.*;
public class MemoryProtectionSample
{
// Create aditional entropy for use with the Protect method.
private static ubyte sAditionalEntropy[] = { 9, 8, 7, 6, 5 };
public static void main(String args[])
{
// Create the original data to be encrypted (The data length should
// be a multiple of 16).
ubyte 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 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);
} //main
} //MemoryProtectionSample