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// Copyright 2014 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.
#ifndef EXTENSIONS_BROWSER_CONTENT_VERIFIER_H_
#define EXTENSIONS_BROWSER_CONTENT_VERIFIER_H_
#include <set>
#include <string>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/scoped_observer.h"
#include "base/version.h"
#include "extensions/browser/content_verifier_delegate.h"
#include "extensions/browser/content_verify_job.h"
#include "extensions/browser/extension_registry_observer.h"
namespace base {
class FilePath;
}
namespace content {
class BrowserContext;
}
namespace extensions {
class Extension;
class ContentHashFetcher;
class ContentVerifierIOData;
// Used for managing overall content verification - both fetching content
// hashes as needed, and supplying job objects to verify file contents as they
// are read.
class ContentVerifier : public base::RefCountedThreadSafe<ContentVerifier>,
public ExtensionRegistryObserver {
public:
class TestObserver {
public:
virtual void OnFetchComplete(const std::string& extension_id,
bool success) = 0;
};
static void SetObserverForTests(TestObserver* observer);
// Takes ownership of |delegate|.
ContentVerifier(content::BrowserContext* context,
ContentVerifierDelegate* delegate);
void Start();
void Shutdown();
// Call this before reading a file within an extension. The caller owns the
// returned job.
ContentVerifyJob* CreateJobFor(const std::string& extension_id,
const base::FilePath& extension_root,
const base::FilePath& relative_path);
// Called (typically by a verification job) to indicate that verification
// failed while reading some file in |extension_id|.
void VerifyFailed(const std::string& extension_id,
ContentVerifyJob::FailureReason reason);
// ExtensionRegistryObserver interface
void OnExtensionLoaded(content::BrowserContext* browser_context,
const Extension* extension) override;
void OnExtensionUnloaded(content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason) override;
private:
DISALLOW_COPY_AND_ASSIGN(ContentVerifier);
friend class base::RefCountedThreadSafe<ContentVerifier>;
~ContentVerifier() override;
void OnFetchComplete(const std::string& extension_id,
bool success,
bool was_force_check,
const std::set<base::FilePath>& hash_mismatch_paths);
void OnFetchCompleteHelper(const std::string& extension_id,
bool shouldVerifyAnyPathsResult);
// Returns true if any of the paths in |relative_paths| *should* have their
// contents verified. (Some files get transcoded during the install process,
// so we don't want to verify their contents because they are expected not
// to match).
bool ShouldVerifyAnyPaths(const std::string& extension_id,
const base::FilePath& extension_root,
const std::set<base::FilePath>& relative_paths);
// Set to true once we've begun shutting down.
bool shutdown_;
content::BrowserContext* context_;
scoped_ptr<ContentVerifierDelegate> delegate_;
// For fetching content hash signatures.
scoped_ptr<ContentHashFetcher> fetcher_;
// For observing the ExtensionRegistry.
ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver> observer_;
// Data that should only be used on the IO thread.
scoped_refptr<ContentVerifierIOData> io_data_;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_CONTENT_VERIFIER_H_
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