1cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 2cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// found in the LICENSE file. 4cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 5cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#ifndef EXTENSIONS_BROWSER_CONTENT_HASH_READER_H_ 6cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#define EXTENSIONS_BROWSER_CONTENT_HASH_READER_H_ 7cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 8cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include <string> 9cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include <vector> 10cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 11cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "base/files/file_path.h" 12cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "base/memory/ref_counted.h" 13cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "base/memory/scoped_ptr.h" 14cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "base/version.h" 15cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "extensions/browser/content_verifier_delegate.h" 16cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 17cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)namespace extensions { 18cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 19cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)class VerifiedContents; 20cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 21cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// This class creates an object that will read expected hashes that may have 22cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// been fetched/calculated by the ContentHashFetcher, and vends them out for 23cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)// use in ContentVerifyJob's. 24cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)class ContentHashReader : public base::RefCountedThreadSafe<ContentHashReader> { 25cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) public: 26cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Create one of these to get expected hashes for the file at |relative_path| 27cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // within an extension. 28cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ContentHashReader(const std::string& extension_id, 29cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const base::Version& extension_version, 30cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const base::FilePath& extension_root, 31cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const base::FilePath& relative_path, 32cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const ContentVerifierKey& key); 33cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 34cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const std::string& extension_id() const { return extension_id_; } 35cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const base::FilePath& relative_path() const { return relative_path_; } 36cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 37cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // This should be called to initialize this object (reads the expected hashes 38cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // from storage, etc.). Must be called on a thread that is allowed to do file 39cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // I/O. Returns a boolean indicating success/failure. On failure, this object 40cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // should likely be discarded. 41cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool Init(); 42cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 431320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // Indicates whether the content in question exists in the local extension 441320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // installation. This may be |false| if Init fails. 451320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci bool content_exists() const { return content_exists_; } 461320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 47f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // These return whether we found valid verified_contents.json / 48f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // computed_hashes.json files respectively. Note that both of these can be 49f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // true but we still didn't find an entry for |relative_path_| in them. 501320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci bool have_verified_contents() const { return have_verified_contents_; } 511320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci bool have_computed_hashes() const { return have_computed_hashes_; } 52f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 53cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Return the number of blocks and block size, respectively. Only valid after 54cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // calling Init(). 55cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) int block_count() const; 56cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) int block_size() const; 57cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 58cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Returns a pointer to the expected sha256 hash value for the block at the 59cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // given index. Only valid after calling Init(). 60cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) bool GetHashForBlock(int block_index, const std::string** result) const; 61cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 62cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) private: 63cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) friend class base::RefCountedThreadSafe<ContentHashReader>; 64cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) virtual ~ContentHashReader(); 65cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 66cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) enum InitStatus { NOT_INITIALIZED, SUCCESS, FAILURE }; 67cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 68cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) std::string extension_id_; 69cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::Version extension_version_; 70cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::FilePath extension_root_; 71cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::FilePath relative_path_; 72cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) ContentVerifierKey key_; 73cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 74cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) InitStatus status_; 75cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 761320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci bool content_exists_; 771320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 78f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) bool have_verified_contents_; 79f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) bool have_computed_hashes_; 80f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 81cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // The blocksize used for generating the hashes. 82cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) int block_size_; 83cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 84cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) scoped_ptr<VerifiedContents> verified_contents_; 85cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 86cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) std::vector<std::string> hashes_; 87cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 88cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(ContentHashReader); 89cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)}; 90cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 91cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} // namespace extensions 92cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 93cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#endif // EXTENSIONS_BROWSER_CONTENT_HASH_READER_H_ 94