extensions/browser/content_verifier.h

   1 // Copyright 2014 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 #ifndef EXTENSIONS_BROWSER_CONTENT_VERIFIER_H_
   6 #define EXTENSIONS_BROWSER_CONTENT_VERIFIER_H_
   7
   8 #include <set>
   9 #include <string>
  10
  11 #include "base/macros.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/scoped_observer.h"
  15 #include "base/version.h"
  16 #include "extensions/browser/content_verifier_delegate.h"
  17 #include "extensions/browser/content_verify_job.h"
  18 #include "extensions/browser/extension_registry_observer.h"
  19
  20 namespace base {
  21 class FilePath;
  22 }
  23
  24 namespace content {
  25 class BrowserContext;
  26 }
  27
  28 namespace extensions {
  29
  30 class Extension;
  31 class ContentHashFetcher;
  32 class ContentVerifierIOData;
  33
  34 // Used for managing overall content verification - both fetching content
  35 // hashes as needed, and supplying job objects to verify file contents as they
  36 // are read.
  37 class ContentVerifier : public base::RefCountedThreadSafe<ContentVerifier>,
  38                         public ExtensionRegistryObserver {
  39  public:
  40   // Takes ownership of |delegate|.
  41   ContentVerifier(content::BrowserContext* context,
  42                   ContentVerifierDelegate* delegate);
  43   void Start();
  44   void Shutdown();
  45
  46   // Call this before reading a file within an extension. The caller owns the
  47   // returned job.
  48   ContentVerifyJob* CreateJobFor(const std::string& extension_id,
  49                                  const base::FilePath& extension_root,
  50                                  const base::FilePath& relative_path);
  51
  52   // Called (typically by a verification job) to indicate that verification
  53   // failed while reading some file in |extension_id|.
  54   void VerifyFailed(const std::string& extension_id,
  55                     ContentVerifyJob::FailureReason reason);
  56
  57   // ExtensionRegistryObserver interface
  58   void OnExtensionLoaded(content::BrowserContext* browser_context,
  59                          const Extension* extension) override;
  60   void OnExtensionUnloaded(content::BrowserContext* browser_context,
  61                            const Extension* extension,
  62                            UnloadedExtensionInfo::Reason reason) override;
  63
  64  private:
  65   DISALLOW_COPY_AND_ASSIGN(ContentVerifier);
  66
  67   friend class base::RefCountedThreadSafe<ContentVerifier>;
  68   ~ContentVerifier() override;
  69
  70   void OnFetchComplete(const std::string& extension_id,
  71                        bool success,
  72                        bool was_force_check,
  73                        const std::set<base::FilePath>& hash_mismatch_paths);
  74
  75   void OnFetchCompleteHelper(const std::string& extension_id,
  76                              bool shouldVerifyAnyPathsResult);
  77
  78   // Returns true if any of the paths in |relative_paths| *should* have their
  79   // contents verified. (Some files get transcoded during the install process,
  80   // so we don't want to verify their contents because they are expected not
  81   // to match).
  82   bool ShouldVerifyAnyPaths(const std::string& extension_id,
  83                             const base::FilePath& extension_root,
  84                             const std::set<base::FilePath>& relative_paths);
  85
  86   // Set to true once we've begun shutting down.
  87   bool shutdown_;
  88
  89   content::BrowserContext* context_;
  90
  91   scoped_ptr<ContentVerifierDelegate> delegate_;
  92
  93   // For fetching content hash signatures.
  94   scoped_ptr<ContentHashFetcher> fetcher_;
  95
  96   // For observing the ExtensionRegistry.
  97   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver> observer_;
  98
  99   // Data that should only be used on the IO thread.
 100   scoped_refptr<ContentVerifierIOData> io_data_;
 101 };
 102
 103 }  // namespace extensions
 104
 105 #endif  // EXTENSIONS_BROWSER_CONTENT_VERIFIER_H_