// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <set>
#include <string>
#include "chrome/browser/download/download_extensions.h"
#include "base/string_util.h"
#include "net/base/mime_util.h"
#include "net/base/net_util.h"
namespace download_util {
// For file extensions taken from mozilla:
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Doug Turner <dougt@netscape.com>
* Dean Tessman <dean_tessman@hotmail.com>
* Brodie Thiesfield <brofield@jellycan.com>
* Jungshik Shin <jshin@i18nl10n.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
static const struct Executables {
const char* extension;
DownloadDangerLevel level;
} g_executables[] = {
{ "class", Dangerous },
{ "htm", AllowOnUserGesture },
{ "html", AllowOnUserGesture },
{ "jar", Dangerous },
{ "jnlp", Dangerous },
{ "pdf", AllowOnUserGesture },
{ "pdfxml", AllowOnUserGesture },
{ "mars", AllowOnUserGesture },
{ "fdf", AllowOnUserGesture },
{ "xfdf", AllowOnUserGesture },
{ "xdp", AllowOnUserGesture },
{ "xfd", AllowOnUserGesture },
{ "pl", AllowOnUserGesture },
{ "py", AllowOnUserGesture },
{ "rb", AllowOnUserGesture },
{ "shtm", AllowOnUserGesture },
{ "shtml", AllowOnUserGesture },
{ "svg", AllowOnUserGesture },
{ "swf", AllowOnUserGesture },
{ "xht", AllowOnUserGesture },
{ "xhtm", AllowOnUserGesture },
{ "xhtml", AllowOnUserGesture },
{ "xml", AllowOnUserGesture },
{ "xsl", AllowOnUserGesture },
{ "xslt", AllowOnUserGesture },
#if defined(OS_WIN)
{ "ad", AllowOnUserGesture },
{ "ade", AllowOnUserGesture },
{ "adp", AllowOnUserGesture },
{ "app", AllowOnUserGesture },
{ "application", AllowOnUserGesture },
{ "asp", AllowOnUserGesture },
{ "asx", AllowOnUserGesture },
{ "bas", AllowOnUserGesture },
{ "bat", AllowOnUserGesture },
{ "chi", AllowOnUserGesture },
{ "chm", AllowOnUserGesture },
{ "cmd", AllowOnUserGesture },
{ "com", AllowOnUserGesture },
{ "cpl", AllowOnUserGesture },
{ "crt", AllowOnUserGesture },
{ "dll", Dangerous },
{ "drv", Dangerous },
{ "exe", AllowOnUserGesture },
{ "fxp", AllowOnUserGesture },
{ "grp", Dangerous },
{ "hlp", AllowOnUserGesture },
{ "hta", AllowOnUserGesture },
{ "htt", AllowOnUserGesture },
{ "inf", AllowOnUserGesture },
{ "ins", AllowOnUserGesture },
{ "isp", AllowOnUserGesture },
{ "js", AllowOnUserGesture },
{ "jse", AllowOnUserGesture },
{ "lnk", AllowOnUserGesture },
{ "mad", AllowOnUserGesture },
{ "maf", AllowOnUserGesture },
{ "mag", AllowOnUserGesture },
{ "mam", AllowOnUserGesture },
{ "maq", AllowOnUserGesture },
{ "mar", AllowOnUserGesture },
{ "mas", AllowOnUserGesture },
{ "mat", AllowOnUserGesture },
{ "mau", AllowOnUserGesture },
{ "mav", AllowOnUserGesture },
{ "maw", AllowOnUserGesture },
{ "mda", AllowOnUserGesture },
{ "mdb", AllowOnUserGesture },
{ "mde", AllowOnUserGesture },
{ "mdt", AllowOnUserGesture },
{ "mdw", AllowOnUserGesture },
{ "mdz", AllowOnUserGesture },
{ "mht", AllowOnUserGesture },
{ "mhtml", AllowOnUserGesture },
{ "mmc", AllowOnUserGesture },
{ "msc", AllowOnUserGesture },
{ "msh", AllowOnUserGesture },
{ "mshxml", AllowOnUserGesture },
{ "msi", AllowOnUserGesture },
{ "msp", AllowOnUserGesture },
{ "mst", AllowOnUserGesture },
{ "ocx", AllowOnUserGesture },
{ "ops", AllowOnUserGesture },
{ "pcd", AllowOnUserGesture },
{ "pif", AllowOnUserGesture },
{ "plg", AllowOnUserGesture },
{ "prf", AllowOnUserGesture },
{ "prg", AllowOnUserGesture },
{ "pst", AllowOnUserGesture },
{ "reg", AllowOnUserGesture },
{ "scf", AllowOnUserGesture },
{ "scr", AllowOnUserGesture },
{ "sct", AllowOnUserGesture },
{ "shb", AllowOnUserGesture },
{ "shs", AllowOnUserGesture },
{ "sys", Dangerous },
{ "url", AllowOnUserGesture },
{ "vb", AllowOnUserGesture },
{ "vbe", AllowOnUserGesture },
{ "vbs", AllowOnUserGesture },
{ "vsd", AllowOnUserGesture },
{ "vsmacros", AllowOnUserGesture },
{ "vss", AllowOnUserGesture },
{ "vst", AllowOnUserGesture },
{ "vsw", AllowOnUserGesture },
{ "ws", AllowOnUserGesture },
{ "wsc", AllowOnUserGesture },
{ "wsf", AllowOnUserGesture },
{ "wsh", AllowOnUserGesture },
{ "xbap", Dangerous },
#elif defined(OS_MACOSX)
// TODO(thakis): Figure out what makes sense here -- crbug.com/19096
{ "app", AllowOnUserGesture },
{ "dmg", AllowOnUserGesture },
#elif defined(OS_POSIX)
// TODO(estade): lengthen this list.
{ "bash", AllowOnUserGesture },
{ "csh", AllowOnUserGesture },
{ "deb", AllowOnUserGesture },
{ "exe", AllowOnUserGesture },
{ "ksh", AllowOnUserGesture },
{ "rpm", AllowOnUserGesture },
{ "sh", AllowOnUserGesture },
{ "tcsh", AllowOnUserGesture },
#endif
};
DownloadDangerLevel GetFileDangerLevel(const FilePath& path) {
return GetFileExtensionDangerLevel(path.Extension());
}
DownloadDangerLevel GetFileExtensionDangerLevel(
const FilePath::StringType& extension) {
if (extension.empty())
return NotDangerous;
if (!IsStringASCII(extension))
return NotDangerous;
#if defined(OS_WIN)
std::string ascii_extension = WideToASCII(extension);
#elif defined(OS_POSIX)
std::string ascii_extension = extension;
#endif
// Strip out leading dot if it's still there
if (ascii_extension[0] == FilePath::kExtensionSeparator)
ascii_extension.erase(0, 1);
for (size_t i = 0; i < arraysize(g_executables); ++i) {
if (LowerCaseEqualsASCII(ascii_extension, g_executables[i].extension))
return g_executables[i].level;
}
return NotDangerous;
}
bool IsFileSafe(const FilePath& path) {
return GetFileDangerLevel(path) == NotDangerous;
}
static const char* kExecutableWhiteList[] = {
// JavaScript is just as powerful as EXE.
"text/javascript",
"text/javascript;version=*",
"text/html",
// Registry files can cause critical changes to the MS OS behavior.
// Addition of this mimetype also addresses bug 7337.
"text/x-registry",
"text/x-sh",
// Some sites use binary/octet-stream to mean application/octet-stream.
// See http://code.google.com/p/chromium/issues/detail?id=1573
"binary/octet-stream"
};
static const char* kExecutableBlackList[] = {
// These application types are not executable.
"application/*+xml",
"application/xml"
};
bool IsExecutableMimeType(const std::string& mime_type) {
for (size_t i = 0; i < arraysize(kExecutableWhiteList); ++i) {
if (net::MatchesMimeType(kExecutableWhiteList[i], mime_type))
return true;
}
for (size_t i = 0; i < arraysize(kExecutableBlackList); ++i) {
if (net::MatchesMimeType(kExecutableBlackList[i], mime_type))
return false;
}
// We consider only other application types to be executable.
return net::MatchesMimeType("application/*", mime_type);
}
} // namespace download_util