Zac Brown : wininet: Fix FtpGetCurrentDirectoryW to handle bad input.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b9b900f4b89f4225259b02482fb8d828fa693586
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=b9b900f4b89f4225259b02482fb8d828fa693586

Author: Zac Brown <zac at zacbrown.org>
Date:   Sat Dec  1 17:21:07 2007 -0500

wininet: Fix FtpGetCurrentDirectoryW to handle bad input.

---

 dlls/wininet/ftp.c |   20 +++++++++++++++++++-
 1 files changed, 19 insertions(+), 1 deletions(-)

diff --git a/dlls/wininet/ftp.c b/dlls/wininet/ftp.c
index 39fbc90..ce60fa0 100644
--- a/dlls/wininet/ftp.c
+++ b/dlls/wininet/ftp.c
@@ -885,12 +885,30 @@ BOOL WINAPI FtpGetCurrentDirectoryW(HINTERNET hFtpSession, LPWSTR lpszCurrentDir
     TRACE("len(%d)\n", *lpdwCurrentDirectory);
 
     lpwfs = (LPWININETFTPSESSIONW) WININET_GetObject( hFtpSession );
-    if (NULL == lpwfs || WH_HFTPSESSION != lpwfs->hdr.htype)
+    if (NULL == lpwfs)
+    {
+        INTERNET_SetLastError(ERROR_INVALID_HANDLE);
+        goto lend;
+    }
+
+    if (WH_HFTPSESSION != lpwfs->hdr.htype)
     {
         INTERNET_SetLastError(ERROR_INTERNET_INCORRECT_HANDLE_TYPE);
         goto lend;
     }
 
+    if (!lpdwCurrentDirectory)
+    {
+        INTERNET_SetLastError(ERROR_INVALID_PARAMETER);
+        goto lend;
+    }
+
+    if (lpszCurrentDirectory == NULL)
+    {
+        INTERNET_SetLastError(ERROR_INSUFFICIENT_BUFFER);
+        goto lend;
+    }
+
     if (lpwfs->download_in_progress != NULL)
     {
         INTERNET_SetLastError(ERROR_FTP_TRANSFER_IN_PROGRESS);