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OpenThreadToken function

The OpenThreadToken function opens the access token associated with a thread.

Syntax


BOOL WINAPI OpenThreadToken(
  _In_   HANDLE ThreadHandle,
  _In_   DWORD DesiredAccess,
  _In_   BOOL OpenAsSelf,
  _Out_  PHANDLE TokenHandle
);

Parameters

ThreadHandle [in]

A handle to the thread whose access token is opened.

DesiredAccess [in]

Specifies an access mask that specifies the requested types of access to the access token. These requested access types are reconciled against the token's discretionary access control list (DACL) to determine which accesses are granted or denied.

For a list of access rights for access tokens, see Access Rights for Access-Token Objects.

OpenAsSelf [in]

TRUE if the access check is to be made against the process-level security context.

FALSE if the access check is to be made against the current security context of the thread calling the OpenThreadToken function.

The OpenAsSelf parameter allows the caller of this function to open the access token of a specified thread when the caller is impersonating a token at SecurityIdentification level. Without this parameter, the calling thread cannot open the access token on the specified thread because it is impossible to open executive-level objects by using the SecurityIdentification impersonation level.

TokenHandle [out]

A pointer to a variable that receives the handle to the newly opened access token.

Return value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError. If the token has the anonymous impersonation level, the token will not be opened and OpenThreadToken sets ERROR_CANT_OPEN_ANONYMOUS as the error.

Remarks

Tokens with the anonymous impersonation level cannot be opened.

Close the access token handle returned through the TokenHandle parameter by calling CloseHandle.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Winbase.h (include Windows.h)

Library

Advapi32.lib

DLL

Advapi32.dll

See also

Access Control Overview
Basic Access Control Functions
AccessCheck
AdjustTokenGroups
AdjustTokenPrivileges
CloseHandle
GetTokenInformation
OpenProcessToken
SECURITY_IMPERSONATION_LEVEL
SetThreadToken
SetTokenInformation

 

 

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