chrome/common/safe_browsing/download_protection_util.cc

   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/download_protection_util.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/files/file_path.h"
  10 #include "base/logging.h"
  11
  12 namespace safe_browsing {
  13 namespace download_protection_util {
  14
  15 namespace {
  16
  17 // This enum matches the SBClientDownloadExtensions enum in histograms.xml. If
  18 // you are adding a value here, you should also add to the enum definition in
  19 // histograms.xml. Additions only at the end just in front of EXTENSION_MAX,
  20 // natch.
  21 enum SBClientDownloadExtensions {
  22   EXTENSION_EXE,
  23   EXTENSION_MSI,
  24   EXTENSION_CAB,
  25   EXTENSION_SYS,
  26   EXTENSION_SCR,
  27   EXTENSION_DRV,
  28   EXTENSION_BAT,
  29   EXTENSION_ZIP,
  30   EXTENSION_RAR,
  31   EXTENSION_DLL,
  32   EXTENSION_PIF,
  33   EXTENSION_COM,
  34   EXTENSION_JAR,
  35   EXTENSION_CLASS,
  36   EXTENSION_PDF,
  37   EXTENSION_VB,
  38   EXTENSION_REG,
  39   EXTENSION_GRP,
  40   EXTENSION_OTHER,  // The "other" bucket. This is in the middle of the enum
  41                     // due to historical reasons.
  42   EXTENSION_CRX,
  43   EXTENSION_APK,
  44   EXTENSION_DMG,
  45   EXTENSION_PKG,
  46   EXTENSION_TORRENT,
  47   EXTENSION_WEBSITE,
  48   EXTENSION_URL,
  49   EXTENSION_VBE,
  50   EXTENSION_VBS,
  51   EXTENSION_JS,
  52   EXTENSION_JSE,
  53   EXTENSION_MHT,
  54   EXTENSION_MHTML,
  55   EXTENSION_MSC,
  56   EXTENSION_MSP,
  57   EXTENSION_MST,
  58   EXTENSION_BAS,
  59   EXTENSION_HTA,
  60   EXTENSION_MSH,
  61   EXTENSION_MSH1,
  62   EXTENSION_MSH1XML,
  63   EXTENSION_MSH2,
  64   EXTENSION_MSH2XML,
  65   EXTENSION_MSHXML,
  66   EXTENSION_PS1,
  67   EXTENSION_PS1XML,
  68   EXTENSION_PS2,
  69   EXTENSION_PS2XML,
  70   EXTENSION_PSC1,
  71   EXTENSION_PSC2,
  72   EXTENSION_SCF,
  73   EXTENSION_SCT,
  74   EXTENSION_WSF,
  75   EXTENSION_7Z,
  76   EXTENSION_XZ,
  77   EXTENSION_GZ,
  78   EXTENSION_TGZ,
  79   EXTENSION_BZ2,
  80   EXTENSION_TAR,
  81   EXTENSION_ARJ,
  82   EXTENSION_LZH,
  83   EXTENSION_LHA,
  84   EXTENSION_WIM,
  85   EXTENSION_Z,
  86   EXTENSION_LZMA,
  87   EXTENSION_CPIO,
  88   EXTENSION_CMD,
  89   EXTENSION_APP,
  90   EXTENSION_OSX,
  91   EXTENSION_SWF,
  92   EXTENSION_SPL,
  93   EXTENSION_APPLICATION,
  94   EXTENSION_ASP,
  95   EXTENSION_ASX,
  96   EXTENSION_CFG,
  97   EXTENSION_CHI,
  98   EXTENSION_CHM,
  99   EXTENSION_CPL,
 100   EXTENSION_FXP,
 101   EXTENSION_HLP,
 102   EXTENSION_HTT,
 103   EXTENSION_INF,
 104   EXTENSION_INI,
 105   EXTENSION_INS,
 106   EXTENSION_ISP,
 107   EXTENSION_LNK,
 108   EXTENSION_LOCAL,
 109   EXTENSION_MANIFEST,
 110   EXTENSION_MAU,
 111   EXTENSION_MMC,
 112   EXTENSION_MOF,
 113   EXTENSION_OCX,
 114   EXTENSION_OPS,
 115   EXTENSION_PCD,
 116   EXTENSION_PLG,
 117   EXTENSION_PRF,
 118   EXTENSION_PRG,
 119   EXTENSION_PST,
 120   EXTENSION_CRT,
 121   EXTENSION_ADE,
 122   EXTENSION_ADP,
 123   EXTENSION_MAD,
 124   EXTENSION_MAF,
 125   EXTENSION_MAG,
 126   EXTENSION_MAM,
 127   EXTENSION_MAQ,
 128   EXTENSION_MAR,
 129   EXTENSION_MAS,
 130   EXTENSION_MAT,
 131   EXTENSION_MAV,
 132   EXTENSION_MAW,
 133   EXTENSION_MDA,
 134   EXTENSION_MDB,
 135   EXTENSION_MDE,
 136   EXTENSION_MDT,
 137   EXTENSION_MDW,
 138   EXTENSION_MDZ,
 139   EXTENSION_SHB,
 140   EXTENSION_SHS,
 141   EXTENSION_VSD,
 142   EXTENSION_VSMACROS,
 143   EXTENSION_VSS,
 144   EXTENSION_VST,
 145   EXTENSION_VSW,
 146   EXTENSION_WS,
 147   EXTENSION_WSC,
 148   EXTENSION_WSH,
 149   EXTENSION_XBAP,
 150   EXTENSION_XNK,
 151   EXTENSION_JNLP,
 152   EXTENSION_PL,
 153   EXTENSION_PY,
 154   EXTENSION_PYC,
 155   EXTENSION_PYW,
 156   EXTENSION_RB,
 157   EXTENSION_BASH,
 158   EXTENSION_CSH,
 159   EXTENSION_KSH,
 160   EXTENSION_SH,
 161   EXTENSION_SHAR,
 162   EXTENSION_TCSH,
 163   EXTENSION_COMMAND,
 164   EXTENSION_DEB,
 165   EXTENSION_RPM,
 166   EXTENSION_DEX,
 167   EXTENSION_APPREF_MS,
 168   EXTENSION_GADGET,
 169   EXTENSION_EFI,
 170   EXTENSION_FON,
 171   EXTENSION_BZIP2,
 172   EXTENSION_GZIP,
 173   EXTENSION_TAZ,
 174   EXTENSION_TBZ,
 175   EXTENSION_TBZ2,
 176
 177   // New values go above this one.
 178   EXTENSION_MAX
 179 };
 180
 181 struct SafeBrowsingFiletype {
 182   const base::FilePath::CharType* const extension;
 183   int uma_value;
 184   bool is_supported_binary;
 185   bool is_archive;
 186 };
 187
 188 const SafeBrowsingFiletype kSafeBrowsingFileTypes[] = {
 189     // KEEP THIS LIST SORTED!
 190     {FILE_PATH_LITERAL(".7z"), EXTENSION_7Z, true, true},
 191     {FILE_PATH_LITERAL(".ade"), EXTENSION_ADE, true, false},
 192     {FILE_PATH_LITERAL(".adp"), EXTENSION_ADP, true, false},
 193     {FILE_PATH_LITERAL(".apk"), EXTENSION_APK, true, false},
 194     {FILE_PATH_LITERAL(".app"), EXTENSION_APP, true, false},
 195     {FILE_PATH_LITERAL(".application"), EXTENSION_APPLICATION, true, false},
 196     {FILE_PATH_LITERAL(".appref-ms"), EXTENSION_APPREF_MS, true, false},
 197     {FILE_PATH_LITERAL(".arj"), EXTENSION_ARJ, true, true},
 198     {FILE_PATH_LITERAL(".asp"), EXTENSION_ASP, true, false},
 199     {FILE_PATH_LITERAL(".asx"), EXTENSION_ASX, true, false},
 200     {FILE_PATH_LITERAL(".bas"), EXTENSION_BAS, true, false},
 201     {FILE_PATH_LITERAL(".bash"), EXTENSION_BASH, true, false},
 202     {FILE_PATH_LITERAL(".bat"), EXTENSION_BAT, true, false},
 203     {FILE_PATH_LITERAL(".bz2"), EXTENSION_BZ2, true, true},
 204     {FILE_PATH_LITERAL(".bzip2"), EXTENSION_BZIP2, true, true},
 205     {FILE_PATH_LITERAL(".cab"), EXTENSION_CAB, true, true},
 206     {FILE_PATH_LITERAL(".cfg"), EXTENSION_CFG, true, false},
 207     {FILE_PATH_LITERAL(".chi"), EXTENSION_CHI, true, false},
 208     {FILE_PATH_LITERAL(".chm"), EXTENSION_CHM, true, false},
 209     {FILE_PATH_LITERAL(".class"), EXTENSION_CLASS, true, false},
 210     {FILE_PATH_LITERAL(".cmd"), EXTENSION_CMD, true, false},
 211     {FILE_PATH_LITERAL(".com"), EXTENSION_COM, true, false},
 212     {FILE_PATH_LITERAL(".command"), EXTENSION_COMMAND, true, false},
 213     {FILE_PATH_LITERAL(".cpio"), EXTENSION_CPIO, true, true},
 214     {FILE_PATH_LITERAL(".cpl"), EXTENSION_CPL, true, false},
 215     {FILE_PATH_LITERAL(".crt"), EXTENSION_CRT, true, false},
 216     {FILE_PATH_LITERAL(".crx"), EXTENSION_CRX, true, false},
 217     {FILE_PATH_LITERAL(".csh"), EXTENSION_CSH, true, false},
 218     {FILE_PATH_LITERAL(".deb"), EXTENSION_DEB, true, false},
 219     {FILE_PATH_LITERAL(".dex"), EXTENSION_DEX, true, false},
 220     {FILE_PATH_LITERAL(".dll"), EXTENSION_DLL, true, false},
 221     {FILE_PATH_LITERAL(".dmg"), EXTENSION_DMG, true, false},
 222     {FILE_PATH_LITERAL(".drv"), EXTENSION_DRV, true, false},
 223     {FILE_PATH_LITERAL(".efi"), EXTENSION_EFI, true, false},
 224     {FILE_PATH_LITERAL(".exe"), EXTENSION_EXE, true, false},
 225     {FILE_PATH_LITERAL(".fon"), EXTENSION_FON, true, false},
 226     {FILE_PATH_LITERAL(".fxp"), EXTENSION_FXP, true, false},
 227     {FILE_PATH_LITERAL(".gadget"), EXTENSION_GADGET, true, false},
 228     {FILE_PATH_LITERAL(".grp"), EXTENSION_GRP, true, false},
 229     {FILE_PATH_LITERAL(".gz"), EXTENSION_GZ, true, true},
 230     {FILE_PATH_LITERAL(".gzip"), EXTENSION_GZIP, true, true},
 231     {FILE_PATH_LITERAL(".hlp"), EXTENSION_HLP, true, false},
 232     {FILE_PATH_LITERAL(".hta"), EXTENSION_HTA, true, false},
 233     {FILE_PATH_LITERAL(".htt"), EXTENSION_HTT, true, false},
 234     {FILE_PATH_LITERAL(".inf"), EXTENSION_INF, true, false},
 235     {FILE_PATH_LITERAL(".ini"), EXTENSION_INI, true, false},
 236     {FILE_PATH_LITERAL(".ins"), EXTENSION_INS, true, false},
 237     {FILE_PATH_LITERAL(".isp"), EXTENSION_ISP, true, false},
 238     {FILE_PATH_LITERAL(".jar"), EXTENSION_JAR, true, false},
 239     {FILE_PATH_LITERAL(".jnlp"), EXTENSION_JNLP, true, false},
 240     {FILE_PATH_LITERAL(".js"), EXTENSION_JS, true, false},
 241     {FILE_PATH_LITERAL(".jse"), EXTENSION_JSE, true, false},
 242     {FILE_PATH_LITERAL(".ksh"), EXTENSION_KSH, true, false},
 243     {FILE_PATH_LITERAL(".lha"), EXTENSION_LHA, true, true},
 244     {FILE_PATH_LITERAL(".lnk"), EXTENSION_LNK, true, false},
 245     {FILE_PATH_LITERAL(".local"), EXTENSION_LOCAL, true, false},
 246     {FILE_PATH_LITERAL(".lzh"), EXTENSION_LZH, true, true},
 247     {FILE_PATH_LITERAL(".lzma"), EXTENSION_LZMA, true, true},
 248     {FILE_PATH_LITERAL(".mad"), EXTENSION_MAD, true, false},
 249     {FILE_PATH_LITERAL(".maf"), EXTENSION_MAF, true, false},
 250     {FILE_PATH_LITERAL(".mag"), EXTENSION_MAG, true, false},
 251     {FILE_PATH_LITERAL(".mam"), EXTENSION_MAM, true, false},
 252     {FILE_PATH_LITERAL(".manifest"), EXTENSION_MANIFEST, true, false},
 253     {FILE_PATH_LITERAL(".maq"), EXTENSION_MAQ, true, false},
 254     {FILE_PATH_LITERAL(".mar"), EXTENSION_MAR, true, false},
 255     {FILE_PATH_LITERAL(".mas"), EXTENSION_MAS, true, false},
 256     {FILE_PATH_LITERAL(".mat"), EXTENSION_MAT, true, false},
 257     {FILE_PATH_LITERAL(".mau"), EXTENSION_MAU, true, false},
 258     {FILE_PATH_LITERAL(".mav"), EXTENSION_MAV, true, false},
 259     {FILE_PATH_LITERAL(".maw"), EXTENSION_MAW, true, false},
 260     {FILE_PATH_LITERAL(".mda"), EXTENSION_MDA, true, false},
 261     {FILE_PATH_LITERAL(".mdb"), EXTENSION_MDB, true, false},
 262     {FILE_PATH_LITERAL(".mde"), EXTENSION_MDE, true, false},
 263     {FILE_PATH_LITERAL(".mdt"), EXTENSION_MDT, true, false},
 264     {FILE_PATH_LITERAL(".mdw"), EXTENSION_MDW, true, false},
 265     {FILE_PATH_LITERAL(".mdz"), EXTENSION_MDZ, true, false},
 266     {FILE_PATH_LITERAL(".mht"), EXTENSION_MHT, true, false},
 267     {FILE_PATH_LITERAL(".mhtml"), EXTENSION_MHTML, true, false},
 268     {FILE_PATH_LITERAL(".mmc"), EXTENSION_MMC, true, false},
 269     {FILE_PATH_LITERAL(".mof"), EXTENSION_MOF, true, false},
 270     {FILE_PATH_LITERAL(".msc"), EXTENSION_MSC, true, false},
 271     {FILE_PATH_LITERAL(".msh"), EXTENSION_MSH, true, false},
 272     {FILE_PATH_LITERAL(".msh1"), EXTENSION_MSH1, true, false},
 273     {FILE_PATH_LITERAL(".msh1xml"), EXTENSION_MSH1XML, true, false},
 274     {FILE_PATH_LITERAL(".msh2"), EXTENSION_MSH2, true, false},
 275     {FILE_PATH_LITERAL(".msh2xml"), EXTENSION_MSH2XML, true, false},
 276     {FILE_PATH_LITERAL(".mshxml"), EXTENSION_MSHXML, true, false},
 277     {FILE_PATH_LITERAL(".msi"), EXTENSION_MSI, true, false},
 278     {FILE_PATH_LITERAL(".msp"), EXTENSION_MSP, true, false},
 279     {FILE_PATH_LITERAL(".mst"), EXTENSION_MST, true, false},
 280     {FILE_PATH_LITERAL(".ocx"), EXTENSION_OCX, true, false},
 281     {FILE_PATH_LITERAL(".ops"), EXTENSION_OPS, true, false},
 282     {FILE_PATH_LITERAL(".osx"), EXTENSION_OSX, true, false},
 283     {FILE_PATH_LITERAL(".pcd"), EXTENSION_PCD, true, false},
 284     {FILE_PATH_LITERAL(".pif"), EXTENSION_PIF, true, false},
 285     {FILE_PATH_LITERAL(".pkg"), EXTENSION_PKG, true, false},
 286     {FILE_PATH_LITERAL(".pl"), EXTENSION_PL, true, false},
 287     {FILE_PATH_LITERAL(".plg"), EXTENSION_PLG, true, false},
 288     {FILE_PATH_LITERAL(".prf"), EXTENSION_PRF, true, false},
 289     {FILE_PATH_LITERAL(".prg"), EXTENSION_PRG, true, false},
 290     {FILE_PATH_LITERAL(".ps1"), EXTENSION_PS1, true, false},
 291     {FILE_PATH_LITERAL(".ps1xml"), EXTENSION_PS1XML, true, false},
 292     {FILE_PATH_LITERAL(".ps2"), EXTENSION_PS2, true, false},
 293     {FILE_PATH_LITERAL(".ps2xml"), EXTENSION_PS2XML, true, false},
 294     {FILE_PATH_LITERAL(".psc1"), EXTENSION_PSC1, true, false},
 295     {FILE_PATH_LITERAL(".psc2"), EXTENSION_PSC2, true, false},
 296     {FILE_PATH_LITERAL(".pst"), EXTENSION_PST, true, false},
 297     {FILE_PATH_LITERAL(".py"), EXTENSION_PY, true, false},
 298     {FILE_PATH_LITERAL(".pyc"), EXTENSION_PYC, true, false},
 299     {FILE_PATH_LITERAL(".pyw"), EXTENSION_PYW, true, false},
 300     {FILE_PATH_LITERAL(".rar"), EXTENSION_RAR, true, true},
 301     {FILE_PATH_LITERAL(".rb"), EXTENSION_RB, true, false},
 302     {FILE_PATH_LITERAL(".reg"), EXTENSION_REG, true, false},
 303     {FILE_PATH_LITERAL(".rpm"), EXTENSION_RPM, true, false},
 304     {FILE_PATH_LITERAL(".scf"), EXTENSION_SCF, true, false},
 305     {FILE_PATH_LITERAL(".scr"), EXTENSION_SCR, true, false},
 306     {FILE_PATH_LITERAL(".sct"), EXTENSION_SCT, true, false},
 307     {FILE_PATH_LITERAL(".sh"), EXTENSION_SH, true, false},
 308     {FILE_PATH_LITERAL(".shar"), EXTENSION_SHAR, true, false},
 309     {FILE_PATH_LITERAL(".shb"), EXTENSION_SHB, true, false},
 310     {FILE_PATH_LITERAL(".shs"), EXTENSION_SHS, true, false},
 311     {FILE_PATH_LITERAL(".spl"), EXTENSION_SPL, true, false},
 312     {FILE_PATH_LITERAL(".swf"), EXTENSION_SWF, true, false},
 313     {FILE_PATH_LITERAL(".sys"), EXTENSION_SYS, true, false},
 314     {FILE_PATH_LITERAL(".tar"), EXTENSION_TAR, true, true},
 315     {FILE_PATH_LITERAL(".taz"), EXTENSION_TAZ, true, true},
 316     {FILE_PATH_LITERAL(".tbz"), EXTENSION_TBZ, true, true},
 317     {FILE_PATH_LITERAL(".tbz2"), EXTENSION_TBZ2, true, true},
 318     {FILE_PATH_LITERAL(".tcsh"), EXTENSION_TCSH, true, false},
 319     {FILE_PATH_LITERAL(".tgz"), EXTENSION_TGZ, true, true},
 320     {FILE_PATH_LITERAL(".torrent"), EXTENSION_TORRENT, true, false},
 321     {FILE_PATH_LITERAL(".url"), EXTENSION_URL, true, false},
 322     {FILE_PATH_LITERAL(".vb"), EXTENSION_VB, true, false},
 323     {FILE_PATH_LITERAL(".vbe"), EXTENSION_VBE, true, false},
 324     {FILE_PATH_LITERAL(".vbs"), EXTENSION_VBS, true, false},
 325     {FILE_PATH_LITERAL(".vsd"), EXTENSION_VSD, true, false},
 326     {FILE_PATH_LITERAL(".vsmacros"), EXTENSION_VSMACROS, true, false},
 327     {FILE_PATH_LITERAL(".vss"), EXTENSION_VSS, true, false},
 328     {FILE_PATH_LITERAL(".vst"), EXTENSION_VST, true, false},
 329     {FILE_PATH_LITERAL(".vsw"), EXTENSION_VSW, true, false},
 330     {FILE_PATH_LITERAL(".website"), EXTENSION_WEBSITE, true, false},
 331     {FILE_PATH_LITERAL(".wim"), EXTENSION_WIM, true, true},
 332     {FILE_PATH_LITERAL(".ws"), EXTENSION_WS, true, false},
 333     {FILE_PATH_LITERAL(".wsc"), EXTENSION_WSC, true, false},
 334     {FILE_PATH_LITERAL(".wsf"), EXTENSION_WSF, true, false},
 335     {FILE_PATH_LITERAL(".wsh"), EXTENSION_WSH, true, false},
 336     {FILE_PATH_LITERAL(".xbap"), EXTENSION_XBAP, true, false},
 337     {FILE_PATH_LITERAL(".xnk"), EXTENSION_XNK, true, false},
 338     {FILE_PATH_LITERAL(".xz"), EXTENSION_XZ, true, true},
 339     {FILE_PATH_LITERAL(".z"), EXTENSION_Z, true, true},
 340     {FILE_PATH_LITERAL(".zip"), EXTENSION_ZIP, true, true},
 341 };
 342
 343 const SafeBrowsingFiletype& GetFileType(const base::FilePath& file) {
 344   static const SafeBrowsingFiletype kOther = {
 345     nullptr, EXTENSION_OTHER, false, false
 346   };
 347
 348   base::FilePath::StringType extension = file.FinalExtension();
 349   SafeBrowsingFiletype needle = {extension.c_str()};
 350
 351   const auto begin = kSafeBrowsingFileTypes;
 352   const auto end = kSafeBrowsingFileTypes + arraysize(kSafeBrowsingFileTypes);
 353   const auto result = std::lower_bound(
 354       begin, end, needle,
 355       [](const SafeBrowsingFiletype& left, const SafeBrowsingFiletype& right) {
 356         return base::FilePath::CompareLessIgnoreCase(left.extension,
 357                                                      right.extension);
 358       });
 359   if (result == end ||
 360       !base::FilePath::CompareEqualIgnoreCase(needle.extension,
 361                                               result->extension))
 362     return kOther;
 363   return *result;
 364 }
 365
 366 } // namespace
 367
 368 const int kSBClientDownloadExtensionsMax = EXTENSION_MAX;
 369
 370 bool IsArchiveFile(const base::FilePath& file) {
 371   // List of interesting archive file formats in kSafeBrowsingFileTypes is by no
 372   // means exhaustive, but are currently file types that Safe Browsing would
 373   // like to see pings for due to the possibility of them being used as wrapper
 374   // formats for malicious payloads.
 375   return GetFileType(file).is_archive;
 376 }
 377
 378 bool IsSupportedBinaryFile(const base::FilePath& file) {
 379   return GetFileType(file).is_supported_binary;
 380 }
 381
 382 ClientDownloadRequest::DownloadType GetDownloadType(
 383     const base::FilePath& file) {
 384   DCHECK(IsSupportedBinaryFile(file));
 385   if (file.MatchesExtension(FILE_PATH_LITERAL(".apk")))
 386     return ClientDownloadRequest::ANDROID_APK;
 387   else if (file.MatchesExtension(FILE_PATH_LITERAL(".crx")))
 388     return ClientDownloadRequest::CHROME_EXTENSION;
 389   else if (file.MatchesExtension(FILE_PATH_LITERAL(".zip")))
 390     // DownloadProtectionService doesn't send a ClientDownloadRequest for ZIP
 391     // files unless they contain either executables or archives. The resulting
 392     // DownloadType is either ZIPPED_EXECUTABLE or ZIPPED_ARCHIVE respectively.
 393     // This function will return ZIPPED_EXECUTABLE for ZIP files as a
 394     // placeholder. The correct DownloadType will be determined based on the
 395     // result of analyzing the ZIP file.
 396     return ClientDownloadRequest::ZIPPED_EXECUTABLE;
 397   else if (file.MatchesExtension(FILE_PATH_LITERAL(".dmg")) ||
 398            file.MatchesExtension(FILE_PATH_LITERAL(".pkg")) ||
 399            file.MatchesExtension(FILE_PATH_LITERAL(".osx")) ||
 400            file.MatchesExtension(FILE_PATH_LITERAL(".app")))
 401     return ClientDownloadRequest::MAC_EXECUTABLE;
 402   else if (IsArchiveFile(file))
 403     return ClientDownloadRequest::ARCHIVE;
 404   return ClientDownloadRequest::WIN_EXECUTABLE;
 405 }
 406
 407 int GetSBClientDownloadExtensionValueForUMA(const base::FilePath& file) {
 408   return GetFileType(file).uma_value;
 409 }
 410
 411 }  // namespace download_protection_util
 412 }  // namespace safe_browsing