Add external extensions json source in proper mac location.

base/file_util_unittest.cc

 // Copyright (c) 2011 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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 92 matching lines @@
   REPARSE_DATA_BUFFER data = {0};
   data.ReparseTag = 0xa0000003;
   if (!DeviceIoControl(source, FSCTL_DELETE_REPARSE_POINT, &data, 8, NULL, 0,
                        &returned, NULL)) {
     return false;
   }
   return true;
 }
 #endif
 
+#if defined(OS_POSIX)
+// Provide a simple way to change the permissions bits on |path| in tests.
+// ASSERT failures will return, but not stop the test.  Caller should wrap
+// calls to this function in ASSERT_NO_FATAL_FAILURE().
+void ChangePosixFilePermissions(const FilePath& path,
+                                mode_t mode_bits_to_set,
+                                mode_t mode_bits_to_clear) {
+  ASSERT_EQ(0u, mode_bits_to_set & mode_bits_to_clear)
+      << "Can't set and clear the same bit.";
+
+  struct stat stat_buf;
+  ASSERT_EQ(0, stat(path.value().c_str(), &stat_buf));
+
+  mode_t new_mode_bits = stat_buf.st_mode;
+  new_mode_bits |= mode_bits_to_set;
+  new_mode_bits &= ~mode_bits_to_clear;
+
+  ASSERT_EQ(0, chmod(path.value().c_str(), new_mode_bits));
+}
+#endif  // defined(OS_POSIX)
+
 const wchar_t bogus_content[] = L"I'm cannon fodder.";
 
 const file_util::FileEnumerator::FileType FILES_AND_DIRECTORIES =
     static_cast<file_util::FileEnumerator::FileType>(
         file_util::FileEnumerator::FILES |
         file_util::FileEnumerator::DIRECTORIES);
 
 // file_util winds up using autoreleased objects on the Mac, so this needs
 // to be a PlatformTest
 class FileUtilTest : public PlatformTest {
@@ skipping 1683 matching lines @@
 
   EXPECT_TRUE(file_util::IsDirectoryEmpty(empty_dir));
 
   FilePath foo(empty_dir.Append(FILE_PATH_LITERAL("foo.txt")));
   std::string bar("baz");
   ASSERT_TRUE(file_util::WriteFile(foo, bar.c_str(), bar.length()));
 
   EXPECT_FALSE(file_util::IsDirectoryEmpty(empty_dir));
 }
 
+#if defined(OS_POSIX)
+
+// Testing IsPathControlledByAdmin() is hard, because there is no
+// way a test can make a file owned by root, or change file paths
+// at the root of the file system.  IsPathControlledByAdmin()
+// is implemented as a call to IsPathControlledByUser, which gives
+// us the ability to test with paths under the test's temp directory,
+// using a user id we control.
+// Pull tests of IsPathControlledByUserTest() into a separate test class
+// with a common SetUp() method.
+class IsPathControlledByUserTest : public FileUtilTest {
+ protected:
+  virtual void SetUp() {
+    FileUtilTest::SetUp();
+
+    // Create a basic structure used by each test.
+    // base_dir_
+    //  |-> sub_dir_
+    //       |-> text_file_
+
+    base_dir_ = temp_dir_.path().AppendASCII("base_dir");
+    ASSERT_TRUE(file_util::CreateDirectory(base_dir_));
+
+    sub_dir_ = base_dir_.AppendASCII("sub_dir");
+    ASSERT_TRUE(file_util::CreateDirectory(sub_dir_));
+
+    text_file_ = sub_dir_.AppendASCII("file.txt");
+    CreateTextFile(text_file_, L"This text file has some text in it.");
+
+    // Our user and group id.
+    uid_ = getuid();
+    gid_ = getgid();
+  }
+
+  FilePath base_dir_;
+  FilePath sub_dir_;
+  FilePath text_file_;
+  uid_t uid_;
+  gid_t gid_;
+};
+
+TEST_F(IsPathControlledByUserTest, BadPaths) {
+  // File does not exist.
+  FilePath does_not_exist = base_dir_.AppendASCII("does")
+                                     .AppendASCII("not")
+                                     .AppendASCII("exist");
+
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, does_not_exist, uid_, gid_));
+
+  // |base| not a subpath of |path|.
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(sub_dir_, base_dir_, uid_, gid_));
+
+  // An empty base path will fail to be a prefix for any path.
+  FilePath empty;
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(empty, base_dir_, uid_, gid_));
+
+  // Finding that a bad call fails proves nothing unless a good call succeeds.
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+}
+
+TEST_F(IsPathControlledByUserTest, Symlinks) {
+  // Symlinks in the path should cause failure.
+
+  // Symlink to the file at the end of the path.
+  FilePath file_link =  base_dir_.AppendASCII("file_link");
+  ASSERT_TRUE(file_util::CreateSymbolicLink(text_file_, file_link))
+      << "Failed to create symlink.";
+
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, file_link, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(file_link, file_link, uid_, gid_));
+
+  // Symlink from one directory to another within the path.
+  FilePath link_to_sub_dir_ =  base_dir_.AppendASCII("link_to_sub_dir_");
+  ASSERT_TRUE(file_util::CreateSymbolicLink(sub_dir_, link_to_sub_dir_))
+    << "Failed to create symlink.";
+
+  FilePath file_path_with_link = link_to_sub_dir_.AppendASCII("file.txt");
+  ASSERT_TRUE(file_util::PathExists(file_path_with_link));
+
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(
+          base_dir_, file_path_with_link, uid_, gid_));
+
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(
+          link_to_sub_dir_, file_path_with_link, uid_, gid_));
+
+  // Symlinks in parents of base path are allowed.
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(
+          file_path_with_link, file_path_with_link, uid_, gid_));
+}
+
+TEST_F(IsPathControlledByUserTest, OwnershipChecks) {
+  // Get a uid that is not the uid of files we create.
+  uid_t bad_uid = uid_ + 1;
+
+  // Get a gid that is not ours.
+  gid_t bad_gid = gid_ + 1;
+
+  // Make all files and directories non-world-writable.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(base_dir_, 0u, S_IWOTH));
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(sub_dir_, 0u, S_IWOTH));
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(text_file_, 0u, S_IWOTH));
+
+  // We control these paths.
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+
+  // Another user does not control these paths.
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, bad_uid, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, bad_uid, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, bad_uid, gid_));
+
+  // Another group does not control the paths.
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, bad_gid));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, bad_gid));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, bad_gid));
+}
+
+TEST_F(IsPathControlledByUserTest, WriteBitChecks) {
+
+  // Make all files and directories non-world-writable.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(base_dir_, 0u, S_IWOTH));
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(sub_dir_, 0u, S_IWOTH));
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(text_file_, 0u, S_IWOTH));
+
+  // Initialy, we control all parts of teh path.
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+
+   // Make base_dir_ world-writable.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(base_dir_, S_IWOTH, 0u));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+
+  // Make sub_dir_ world writable.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(sub_dir_, S_IWOTH, 0u));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+
+  // Make text_file_ world writable.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(text_file_, S_IWOTH, 0u));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+
+  // Make sub_dir_ non-world writable.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(sub_dir_, 0u, S_IWOTH));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+
+  // Make base_dir_ non-world-writable.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(base_dir_, 0u, S_IWOTH));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_FALSE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+
+  // Back to the initial state: Nothing is writable, so every path
+  // should pass.
+  ASSERT_NO_FATAL_FAILURE(
+      ChangePosixFilePermissions(text_file_, 0u, S_IWOTH));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, sub_dir_, uid_, gid_));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(base_dir_, text_file_, uid_, gid_));
+  EXPECT_TRUE(
+      file_util::IsPathControlledByUser(sub_dir_, text_file_, uid_, gid_));
+}
+
+#endif  // defined(OS_POSIX)
+
 }  // namespace