blob: 07daf5ef3b98981214cf1933875e9d1f5d426af4 [file] [log] [blame]
// 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.
#include <memory>
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/version.h"
#include "extensions/browser/content_verifier/content_verifier_key.h"
#include "extensions/common/extension_id.h"
namespace extensions {
class ContentHash;
// This class creates an object that will read expected hashes that may have
// been fetched/calculated by the ContentHashFetcher, and vends them out for
// use in ContentVerifyJob's.
class ContentHashReader {
// Factory to create ContentHashReader to get expected hashes for the file at
// |relative_path| within an extension.
// Must be called on a thread that is allowed to do file I/O. Returns an
// instance whose succees/failure can be determined by calling succeeded()
// method. On failure, this object should likely be discarded.
static std::unique_ptr<const ContentHashReader> Create(
const base::FilePath& relative_path,
const scoped_refptr<const ContentHash>& content_hash);
bool succeeded() const { return status_ == SUCCESS; }
// Returns true if we found valid verified_contents.json and
// computed_hashes.json files. Note that this can be true even if we didn't
// find an entry for |relative_path| in them.
bool has_content_hashes() const { return has_content_hashes_; }
// Returns whether or not this resource's entry exists in
// verified_contents.json (given that |has_content_hashes_| is true.
bool file_missing_from_verified_contents() const {
return file_missing_from_verified_contents_;
// Return the number of blocks and block size, respectively. Only valid after
// calling Init().
int block_count() const;
int block_size() const;
// Returns a pointer to the expected sha256 hash value for the block at the
// given index. Only valid after calling Init().
bool GetHashForBlock(int block_index, const std::string** result) const;
enum InitStatus { SUCCESS, FAILURE };
InitStatus status_ = FAILURE;
bool has_content_hashes_ = false;
bool file_missing_from_verified_contents_ = false;
// The blocksize used for generating the hashes.
int block_size_ = 0;
std::vector<std::string> hashes_;
} // namespace extensions