[PATCH] user32: Use a default name for winstations created or opened with no name.

23 Jun 2020

The default is of the form "Service-0x<luid high>-<luid low>$" where the
luid in question is the logon session luid.

Signed-off-by: Huw Davies <huw(a)codeweavers.com>
---
 dlls/user32/tests/winstation.c | 24 +++++++++++++++++++-----
 dlls/user32/winstation.c       | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 5 deletions(-)

diff --git a/dlls/user32/tests/winstation.c b/dlls/user32/tests/winstation.c
index 4aa5565b96c..d239ead6e98 100644
--- a/dlls/user32/tests/winstation.c
+++ b/dlls/user32/tests/winstation.c
@@ -118,9 +118,10 @@ static void test_handles(void)
     HANDLE hthread;
     DWORD id, flags, le;
     ATOM atom;
-    char buffer[20];
+    char buffer[29], default_name[29] = "";
     DWORD size;
     BOOL ret;
+    TOKEN_STATISTICS token_stats;
 
     /* win stations */
 
@@ -215,7 +216,6 @@ static void test_handles(void)
     SetLastError( 0xdeadbeef );
     w2 = OpenWindowStationA( "", TRUE, WINSTA_ALL_ACCESS );
     ok( !w2, "open station succeeded\n" );
-    todo_wine
     ok( GetLastError() == ERROR_FILE_NOT_FOUND, "wrong error %u\n", GetLastError() );
 
     SetLastError( 0xdeadbeef );
@@ -225,16 +225,30 @@ static void test_handles(void)
     memset( buffer, 0, sizeof(buffer) );
     ret = GetUserObjectInformationA( w2, UOI_NAME, buffer, sizeof(buffer), &size );
     ok( ret, "GetUserObjectInformationA failed with error %u\n", GetLastError() );
-    todo_wine ok( !memcmp(buffer, "Service-0x0-", 12), "unexpected window station name '%s'\n", buffer );
-    todo_wine ok( buffer[strlen(buffer) - 1] == '$', "unexpected window station name '%s'\n", buffer );
+    /* Get the logon session LUID */
+    ret = GetTokenInformation( GetCurrentProcessToken(), TokenStatistics, &token_stats, sizeof(token_stats), NULL );
+    if (ret)
+        sprintf( default_name, "Service-0x%x-%x$", token_stats.AuthenticationId.HighPart,
+                 token_stats.AuthenticationId.LowPart );
+    if (*default_name)
+        ok( !strcmp( buffer, default_name ), "unexpected window station name '%s' expected '%s'\n", buffer, default_name );
 
     SetLastError( 0xdeadbeef );
     w3 = OpenWindowStationA( "", TRUE, WINSTA_ALL_ACCESS );
-    todo_wine
     ok( w3 != 0, "open station failed err %u\n", GetLastError() );
     CloseWindowStation( w3 );
     CloseWindowStation( w2 );
 
+    w2 = CreateWindowStationA( NULL, 0, WINSTA_ALL_ACCESS, NULL );
+    ok( w2 != 0, "create station failed err %u\n", GetLastError() );
+
+    memset( buffer, 0, sizeof(buffer) );
+    ret = GetUserObjectInformationA( w2, UOI_NAME, buffer, sizeof(buffer), &size );
+    ok( ret, "GetUserObjectInformationA failed with error %u\n", GetLastError() );
+    if (*default_name)
+        ok( !strcmp( buffer, default_name ), "unexpected window station name '%s' expected '%s'\n", buffer, default_name );
+    CloseWindowStation( w2 );
+
     SetLastError( 0xdeadbeef );
     w2 = CreateWindowStationA( "foo\\bar", 0, WINSTA_ALL_ACCESS, NULL );
     ok( !w2, "create station succeeded\n" );
diff --git a/dlls/user32/winstation.c b/dlls/user32/winstation.c
index 4f53b43bd6c..b5d5a372faf 100644
--- a/dlls/user32/winstation.c
+++ b/dlls/user32/winstation.c
@@ -80,6 +80,30 @@ static HANDLE get_winstations_dir_handle(void)
     return handle;
 }
 
+static BOOL WINAPI winstation_default_name_once( INIT_ONCE *once, void *param, void **context )
+{
+    static const WCHAR fmt[] = {'S','e','r','v','i','c','e','-','0','x','%','x','-','%','x','$',0};
+    WCHAR *name = (WCHAR *)param;
+    TOKEN_STATISTICS stats;
+    BOOL ret;
+
+    ret = GetTokenInformation( GetCurrentProcessToken(), TokenStatistics, &stats, sizeof(stats), NULL );
+    if (ret)
+        sprintfW( name, fmt, stats.AuthenticationId.HighPart, stats.AuthenticationId.LowPart );
+
+    return ret;
+}
+
+static const WCHAR *get_winstation_default_name( void )
+{
+    static INIT_ONCE once = INIT_ONCE_STATIC_INIT;
+    static WCHAR name[29];
+    BOOL ret;
+
+    ret = InitOnceExecuteOnce( &once, winstation_default_name_once, name, NULL );
+    return ret ? name : NULL;
+}
+
 /***********************************************************************
  *              CreateWindowStationA  (USER32.@)
  */
@@ -113,6 +137,11 @@ HWINSTA WINAPI CreateWindowStationW( LPCWSTR name, DWORD flags, ACCESS_MASK acce
         SetLastError( ERROR_FILENAME_EXCED_RANGE );
         return 0;
     }
+    if (!len)
+    {
+        name = get_winstation_default_name();
+        len = strlenW( name );
+    }
     SERVER_START_REQ( create_winstation )
     {
         req->flags      = 0;
@@ -160,6 +189,11 @@ HWINSTA WINAPI OpenWindowStationW( LPCWSTR name, BOOL inherit, ACCESS_MASK acces
         SetLastError( ERROR_FILENAME_EXCED_RANGE );
         return 0;
     }
+    if (!len)
+    {
+        name = get_winstation_default_name();
+        len = strlenW( name );
+    }
     SERVER_START_REQ( open_winstation )
     {
         req->access     = access;
-- 
2.23.0

    

Huw Davies

Marvin

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