zip_analyzer.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/common/safe_browsing/zip_analyzer.h"
6
7#include "base/logging.h"
8#include "chrome/common/safe_browsing/download_protection_util.h"
9#include "chrome/common/zip_reader.h"
10
11namespace safe_browsing {
12namespace zip_analyzer {
13
14void AnalyzeZipFile(base::PlatformFile zip_file, Results* results) {
15  zip::ZipReader reader;
16  if (!reader.OpenFromPlatformFile(zip_file)) {
17    VLOG(1) << "Failed to open zip file";
18    return;
19  }
20
21  for (; reader.HasMore(); reader.AdvanceToNextEntry()) {
22    if (!reader.OpenCurrentEntryInZip()) {
23      VLOG(1) << "Failed to open current entry in zip file";
24      continue;
25    }
26    const base::FilePath& file = reader.current_entry_info()->file_path();
27    if (download_protection_util::IsBinaryFile(file)) {
28      // Don't consider an archived archive to be executable, but record
29      // a histogram.
30      if (download_protection_util::IsArchiveFile(file)) {
31        results->has_archive = true;
32      } else {
33        VLOG(2) << "Downloaded a zipped executable: " << file.value();
34        results->has_executable = true;
35        break;
36      }
37    } else {
38      VLOG(3) << "Ignoring non-binary file: " << file.value();
39    }
40  }
41  results->success = true;
42}
43
44}  // namespace zip_analyzer
45}  // namespace safe_browsing
46