kernel32: Check for invalid flags in codepage conversion functions.

dlls/kernel32/locale.c

@@ -54,6 +54,9 @@ WINE_DEFAULT_DEBUG_CHANNEL(nls);
 
 #define LOCALE_LOCALEINFOFLAGSMASK (LOCALE_NOUSEROVERRIDE|LOCALE_USE_CP_ACP|\
                                     LOCALE_RETURN_NUMBER|LOCALE_RETURN_GENITIVE_NAMES)
+#define MB_FLAGSMASK (MB_PRECOMPOSED|MB_COMPOSITE|MB_USEGLYPHCHARS|MB_ERR_INVALID_CHARS)
+#define WC_FLAGSMASK (WC_DISCARDNS|WC_SEPCHARS|WC_DEFAULTCHAR|WC_ERR_INVALID_CHARS|\
+                      WC_COMPOSITECHECK|WC_NO_BEST_FIT_CHARS)
 
 /* current code pages */
 static const union cptable *ansi_cptable;
@@ -2422,6 +2425,11 @@ INT WINAPI MultiByteToWideChar( UINT page, DWORD flags, LPCSTR src, INT srclen,
 #endif
         /* fall through */
     case CP_UTF8:
+        if (flags & ~MB_FLAGSMASK)
+        {
+            SetLastError( ERROR_INVALID_FLAGS );
+            return 0;
+        }
         ret = wine_utf8_mbstowcs( flags, src, srclen, dst, dstlen );
         break;
     default:
@@ -2430,6 +2438,11 @@ INT WINAPI MultiByteToWideChar( UINT page, DWORD flags, LPCSTR src, INT srclen,
             SetLastError( ERROR_INVALID_PARAMETER );
             return 0;
         }
+        if (flags & ~MB_FLAGSMASK)
+        {
+            SetLastError( ERROR_INVALID_FLAGS );
+            return 0;
+        }
         ret = wine_cp_mbstowcs( table, flags, src, srclen, dst, dstlen );
         break;
     }
@@ -2653,6 +2666,11 @@ INT WINAPI WideCharToMultiByte( UINT page, DWORD flags, LPCWSTR src, INT srclen,
             SetLastError( ERROR_INVALID_PARAMETER );
             return 0;
         }
+        if (flags & ~WC_FLAGSMASK)
+        {
+            SetLastError( ERROR_INVALID_FLAGS );
+            return 0;
+        }
         ret = wine_utf8_wcstombs( flags, src, srclen, dst, dstlen );
         break;
     default:
@@ -2661,6 +2679,11 @@ INT WINAPI WideCharToMultiByte( UINT page, DWORD flags, LPCWSTR src, INT srclen,
             SetLastError( ERROR_INVALID_PARAMETER );
             return 0;
         }
+        if (flags & ~WC_FLAGSMASK)
+        {
+            SetLastError( ERROR_INVALID_FLAGS );
+            return 0;
+        }
         ret = wine_cp_wcstombs( table, flags, src, srclen, dst, dstlen,
                                 defchar, used ? &used_tmp : NULL );
         if (used) *used = used_tmp;

dlls/kernel32/tests/codepage.c

@@ -209,6 +209,40 @@ static void test_other_invalid_parameters(void)
     BOOL used;
     INT len;
 
+    /* Unrecognized flag => ERROR_INVALID_FLAGS */
+    SetLastError(0xdeadbeef);
+    len = WideCharToMultiByte(CP_ACP, 0x100, w_string, -1, c_string, c_string_len, NULL, NULL);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_FLAGS, "len=%d error=%x\n", len, GetLastError());
+
+    SetLastError(0xdeadbeef);
+    len = WideCharToMultiByte(CP_ACP, 0x800, w_string, -1, c_string, c_string_len, NULL, NULL);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_FLAGS, "len=%d error=%x\n", len, GetLastError());
+
+    SetLastError(0xdeadbeef);
+    len = MultiByteToWideChar(CP_ACP, 0x10, c_string, -1, w_string, w_string_len);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_FLAGS, "len=%d error=%x\n", len, GetLastError());
+
+
+    /* Unrecognized flag and invalid codepage => ERROR_INVALID_PARAMETER */
+    SetLastError(0xdeadbeef);
+    len = WideCharToMultiByte(0xdeadbeef, 0x100, w_string, w_string_len, c_string, c_string_len, NULL, NULL);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_PARAMETER, "len=%d error=%x\n", len, GetLastError());
+
+    SetLastError(0xdeadbeef);
+    len = MultiByteToWideChar(0xdeadbeef, 0x10, c_string, c_string_len, w_string, w_string_len);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_PARAMETER, "len=%d error=%x\n", len, GetLastError());
+
+
+    /* Unrecognized flag and src is NULL => ERROR_INVALID_PARAMETER */
+    SetLastError(0xdeadbeef);
+    len = WideCharToMultiByte(CP_ACP, 0x100, NULL, -1, c_string, c_string_len, NULL, NULL);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_PARAMETER, "len=%d error=%x\n", len, GetLastError());
+
+    SetLastError(0xdeadbeef);
+    len = MultiByteToWideChar(CP_ACP, 0x10, NULL, -1, w_string, w_string_len);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_PARAMETER, "len=%d error=%x\n", len, GetLastError());
+
+
     /* srclen=0 => ERROR_INVALID_PARAMETER */
     SetLastError(0xdeadbeef);
     len = WideCharToMultiByte(CP_ACP, 0, w_string, 0, c_string, c_string_len, NULL, NULL);
@@ -266,6 +300,11 @@ static void test_other_invalid_parameters(void)
     SetLastError(0xdeadbeef);
     len = WideCharToMultiByte(CP_UTF7, 1, w_string, w_string_len, c_string, c_string_len, NULL, &used);
     ok(len == 0 && GetLastError() == ERROR_INVALID_PARAMETER, "len=%d error=%x\n", len, GetLastError());
+
+    /* CP_UTF8, unrecognized flag and used not NULL => ERROR_INVALID_PARAMETER */
+    SetLastError(0xdeadbeef);
+    len = WideCharToMultiByte(CP_UTF8, 0x100, w_string, w_string_len, c_string, c_string_len, NULL, &used);
+    ok(len == 0 && GetLastError() == ERROR_INVALID_PARAMETER, "len=%d error=%x\n", len, GetLastError());
 }
 
 static void test_overlapped_buffers(void)