Damjan Jovanovic : wldap32: Cyrus SASL's sasl_interact_t.result should be null-terminated.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a4199fa255119f3048a81fd1182ef60ea0be4d8d
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=a4199fa255119f3048a81fd11...

Author: Damjan Jovanovic 
Date:   Fri Feb  5 09:37:28 2021 +0200

wldap32: Cyrus SASL's sasl_interact_t.result should be null-terminated.

Sometimes AD authentication fails as LDAP packets have garbage
characters trailing the username. Reading its source code confirms
that Cyrus SASL often completely ignores the sasl_interact_t.len field,
and expects sasl_interact_t.result to be null-terminated.

Signed-off-by: Damjan Jovanovic 
Signed-off-by: Alexandre Julliard

---

dlls/wldap32/wldap32.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dlls/wldap32/wldap32.h b/dlls/wldap32/wldap32.h
index 537de67a877..3059df8603e 100644
--- a/dlls/wldap32/wldap32.h
+++ b/dlls/wldap32/wldap32.h
@@ -100,9 +100,10 @@ static inline LPWSTR strnAtoW( LPCSTR str, DWORD inlen, DWORD *outlen )
     if (str)
     {
         DWORD len = MultiByteToWideChar( CP_ACP, 0, str, inlen, NULL, 0 );
-        if ((ret = heap_alloc( len * sizeof(WCHAR) )))
+        if ((ret = heap_alloc( (len+1) * sizeof(WCHAR) )))
         {
             MultiByteToWideChar( CP_ACP, 0, str, inlen, ret, len );
+            ret[len] = 0;
             *outlen = len;
         }
     }
@@ -116,9 +117,10 @@ static inline char *strnWtoU( LPCWSTR str, DWORD inlen, DWORD *outlen )
     if (str)
     {
         DWORD len = WideCharToMultiByte( CP_UTF8, 0, str, inlen, NULL, 0, NULL, NULL );
-        if ((ret = heap_alloc( len )))
+        if ((ret = heap_alloc( len + 1 )))
         {
             WideCharToMultiByte( CP_UTF8, 0, str, inlen, ret, len, NULL, NULL );
+            ret[len] = 0;
             *outlen = len;
         }
     }