https://git.reactos.org/?p=reactos.git;a=commitdiff;h=34c39a1336e1cf000b0159bd47f59ee1b1e9def4
commit 34c39a1336e1cf000b0159bd47f59ee1b1e9def4 Author: Pierre Schweitzer <[email protected]> AuthorDate: Mon Oct 23 17:08:50 2017 +0200 [KERNEL32] Implement NpGetUserNamep() --- dll/win32/kernel32/client/file/npipe.c | 85 ++++++++++++++++++++++++++++++++-- 1 file changed, 80 insertions(+), 5 deletions(-) diff --git a/dll/win32/kernel32/client/file/npipe.c b/dll/win32/kernel32/client/file/npipe.c index 3ed0c555e3..b39982e205 100644 --- a/dll/win32/kernel32/client/file/npipe.c +++ b/dll/win32/kernel32/client/file/npipe.c @@ -20,17 +20,92 @@ LONG ProcessPipeId; /* FUNCTIONS ******************************************************************/ +/* + * @implemented + */ static BOOL NpGetUserNamep(HANDLE hNamedPipe, LPWSTR lpUserName, DWORD nMaxUserNameSize) { - /* FIXME - open the thread token, call ImpersonateNamedPipeClient() and - retrieve the user name with GetUserName(), revert the impersonation - and finally restore the thread token */ - UNIMPLEMENTED; - return TRUE; + BOOL Ret; + HANDLE hToken; + HMODULE hAdvapi; + NTSTATUS Status; + BOOL (WINAPI *pRevertToSelf)(void); + BOOL (WINAPI *pGetUserNameW)(LPWSTR lpBuffer, LPDWORD lpnSize); + BOOL (WINAPI *pImpersonateNamedPipeClient)(HANDLE hNamedPipe); + + /* Open advapi, we'll funcs from it */ + hAdvapi = LoadLibraryW(L"advapi32.dll"); + if (hAdvapi == NULL) + { + return FALSE; + } + + /* Import the three required functions */ + pRevertToSelf = GetProcAddress(hAdvapi, "RevertToSelf"); + pGetUserNameW = GetProcAddress(hAdvapi, "GetUserNameW"); + pImpersonateNamedPipeClient = GetProcAddress(hAdvapi, "ImpersonateNamedPipeClient"); + /* If any couldn't be found, fail */ + if (pRevertToSelf == NULL || pGetUserNameW == NULL || pImpersonateNamedPipeClient == NULL) + { + FreeLibrary(hAdvapi); + return FALSE; + } + + /* Now, open the thread token for impersonation */ + Status = NtOpenThreadToken(NtCurrentThread(), TOKEN_IMPERSONATE, TRUE, &hToken); + /* Try to impersonate the pipe client */ + if (pImpersonateNamedPipeClient(hNamedPipe)) + { + DWORD lpnSize; + + /* It worked, get the user name */ + lpnSize = nMaxUserNameSize; + Ret = pGetUserNameW(lpUserName, &lpnSize); + /* Failed to get the thread token? Revert to self */ + if (!NT_SUCCESS(Status)) + { + pRevertToSelf(); + + FreeLibrary(hAdvapi); + return Ret; + } + + /* Restore the thread token */ + Status = NtSetInformationThread(NtCurrentThread(), ThreadImpersonationToken, + &hToken, sizeof(HANDLE)); + /* We cannot fail closing the thread token! */ + if (!CloseHandle(hToken)) + { + ASSERT(FALSE); + } + + /* Set last error if it failed */ + if (!NT_SUCCESS(Status)) + { + BaseSetLastNTError(Status); + } + } + else + { + /* If opening the thread token succeed, close it */ + if (NT_SUCCESS(Status)) + { + /* We cannot fail closing it! */ + if (!CloseHandle(hToken)) + { + ASSERT(FALSE); + } + } + + Ret = FALSE; + } + + FreeLibrary(hAdvapi); + return Ret; }
