The DuplicateTokenEx function creates a new access token that duplicates an existing token. This function can create either a primary token or an impersonation token.
BOOL DuplicateTokenEx(
HANDLE hExistingToken, |
// handle to token to duplicate |
DWORD dwDesiredAccess, |
// access rights of new token |
LPSECURITY_ATTRIBUTES lpTokenAttributes, |
// security attributes of the new token |
SECURITY_IMPERSONATION_LEVEL ImpersonationLevel, |
// impersonation level of new token |
TOKEN_TYPE TokenType, |
// primary or impersonation token |
PHANDLE phNewToken |
// handle to duplicated token |
); |
Value |
Meaning |
TOKEN_ADJUST_DEFAULT |
Required to change the default ACL, primary group, or owner of an access token. |
TOKEN_ADJUST_GROUPS |
Required to change the groups specified in an access token. |
TOKEN_ADJUST_PRIVILEGES |
Required to change the privileges specified in an access token. |
TOKEN_ALL_ACCESS |
Combines the STANDARD_RIGHTS_REQUIRED standard access rights and all individual access rights for tokens. |
TOKEN_ASSIGN_PRIMARY |
Required to attach a primary token to a process in addition to the SE_CREATE_TOKEN_NAME privilege. |
TOKEN_DUPLICATE |
Required to duplicate an access token. |
TOKEN_EXECUTE |
Combines the STANDARD_RIGHTS_EXECUTE standard access rights and the TOKEN_IMPERSONATE access right. |
TOKEN_IMPERSONATE |
Required to attach an impersonation access token to a process. |
TOKEN_QUERY |
Required to query the contents of an access token. |
TOKEN_QUERY_SOURCE |
Required to query the source of an access token. |
TOKEN_READ |
Combines the STANDARD_RIGHTS_READ standard access rights and the TOKEN_QUERY access right. |
TOKEN_WRITE |
Combines the STANDARD_RIGHTS_WRITE standard access rights and the TOKEN_ADJUST_PRIVILEGES, TOKEN_ADJUST_GROUPS, and TOKEN_ADJUST_DEFAULT access rights. |
Value |
Meaning |
TokenPrimary |
The new token is a primary token that you can use in the CreateProcessAsUser function. |
TokenImpersonation |
The new token is an impersonation token. |
If the function succeeds, the return value is a nonzero value.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
The DuplicateTokenEx function allows you to create a primary token that you can use in the CreateProcessAsUser function. This allows a server application that is impersonating a client to create a process that has the security context of the client. Note that the DuplicateToken function can create only impersonation tokens, which are not valid for CreateProcessAsUser.
The following is a typical scenario for using DuplicateTokenEx to create a primary token. A server application creates a thread that calls one of the impersonation functions, such as ImpersonateNamedPipeClient, to impersonate a client. The impersonating thread then calls the OpenThreadToken function to get its own token, which is an impersonation token that has the security context of the client. The thread specifies this impersonation token in a call to DuplicateTokenEx, specifying the TokenPrimary flag. DuplicateTokenEx creates a primary token that has the security context of the client.
When you have finished using the new token, call the CloseHandle function to close the token handle.
CloseHandle, CreateProcessAsUser, DdeImpersonateClient, DuplicateToken, ImpersonateNamedPipeClient, OpenThreadToken, RevertToSelf, RpcImpersonateClient, SECURITY_ATTRIBUTES, SECURITY_IMPERSONATION_LEVEL
file: /Techref/os/win/api/win32/func/src/f18_12.htm, 9KB, , updated: 2000/4/7 12:19, local time: 2024/9/1 10:15,
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