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 "third_party/zlib/google/zip_reader.h" 10 11 namespace safe_browsing { 12 namespace zip_analyzer { 13 14 void 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 bool advanced = true; 22 for (; reader.HasMore(); advanced = reader.AdvanceToNextEntry()) { 23 if (!advanced) { 24 VLOG(1) << "Could not advance to next entry, aborting zip scan."; 25 return; 26 } 27 if (!reader.OpenCurrentEntryInZip()) { 28 VLOG(1) << "Failed to open current entry in zip file"; 29 continue; 30 } 31 const base::FilePath& file = reader.current_entry_info()->file_path(); 32 if (download_protection_util::IsBinaryFile(file)) { 33 // Don't consider an archived archive to be executable, but record 34 // a histogram. 35 if (download_protection_util::IsArchiveFile(file)) { 36 results->has_archive = true; 37 } else { 38 VLOG(2) << "Downloaded a zipped executable: " << file.value(); 39 results->has_executable = true; 40 break; 41 } 42 } else { 43 VLOG(3) << "Ignoring non-binary file: " << file.value(); 44 } 45 } 46 results->success = true; 47 } 48 49 } // namespace zip_analyzer 50 } // namespace safe_browsing 51
