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WindowsIdentity Constructor (IntPtr, String, WindowsAccountType, Boolean)

WindowsIdentity Constructor (IntPtr, String, WindowsAccountType, Boolean)

Initializes a new instance of the WindowsIdentity class for the user represented by the specified Windows account token, the specified authentication type, the specified Windows account type, and the specified authentication status.

Namespace:  System.Security.Principal
Assembly:  mscorlib (in mscorlib.dll)

public WindowsIdentity(
	IntPtr userToken,
	string type,
	WindowsAccountType acctType,
	bool isAuthenticated
)

Parameters

userToken
Type: System.IntPtr

The account token for the user on whose behalf the code is running.

type
Type: System.String

(Informational use only.) The type of authentication used to identify the user. For more information, see Remarks.

acctType
Type: System.Security.Principal.WindowsAccountType

One of the enumeration values.

isAuthenticated
Type: System.Boolean

true to indicate that the user is authenticated; otherwise, false.

ExceptionCondition
ArgumentException

userToken is 0.

-or-

userToken is duplicated and invalid for impersonation.

SecurityException

The caller does not have the correct permissions.

-or-

A Win32 error occurred.

The value of the type parameter is used to set the AuthenticationType parameter. If type is null, the security system sets AuthenticationType to Negotiate on Windows Vista and later versions of the Windows operating system, and to Kerberos on earlier versions of the Windows operating system. The security system does not use this value; it is for informational use only.

You can retrieve the token represented by userToken by calling unmanaged code such as the Win32 API LogonUser function. Always release userToken by calling the Win32 API CloseHandle function. For more information on calling unmanaged code, see Consuming Unmanaged DLL Functions.

The following code shows the use of the WindowsIdentity constructor to create a new instance of the WindowsIdentity class for the user represented by the specified Windows account token, the specified authentication type, the specified Windows account type, and the specified authentication status. This code example is part of a larger example provided for the WindowsIdentity class.

private static void IntPrtStringTypeBoolConstructor(IntPtr logonToken)
{
    // Construct a WindowsIdentity object using the input account token, 
    // and the specified authentication type, Windows account type, and 
    // authentication flag. 
    string authenticationType = "WindowsAuthentication";
    WindowsAccountType guestAccount = WindowsAccountType.Guest;
    bool isAuthenticated = true;
    WindowsIdentity windowsIdentity = new WindowsIdentity(
        logonToken, authenticationType, guestAccount, isAuthenticated);

    Console.WriteLine("Created a Windows identity object named " +
        windowsIdentity.Name + ".");
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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