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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_OFFLINE_PAGES_CORE_ARCHIVE_VALIDATOR_H_
#define COMPONENTS_OFFLINE_PAGES_CORE_ARCHIVE_VALIDATOR_H_
#include <stdint.h>
#include <memory>
#include <string>
#include <utility>
#include "base/containers/span.h"
#include "build/build_config.h"
#include "crypto/hash.h"
namespace base {
class FilePath;
}
namespace offline_pages {
// Used to validate an archive file.
class ArchiveValidator {
public:
ArchiveValidator();
ArchiveValidator(const ArchiveValidator&) = delete;
ArchiveValidator& operator=(const ArchiveValidator&) = delete;
virtual ~ArchiveValidator();
void Update(base::span<const uint8_t> buffer);
void Update(std::string_view buffer);
std::string Finish();
// Computes a SHA256 digest of the specified file. Empty string will be
// returned if the digest cannot be computed.
// Note that content:// URI can be passed in |file_path| on Android.
static std::string ComputeDigest(const base::FilePath& file_path);
// Retrives the file size and computes a SHA256 digest for the specified file.
// Pair of 0 and empty string will be returned if size and digest cannot be
// obtained.
static std::pair<int64_t, std::string> GetSizeAndComputeDigest(
const base::FilePath& file_path);
// Returns true if the specified file has |expected_file_size| and
// |expected_digest|.
// Note that content URI can be passed in |file_path| on Android.
static bool ValidateFile(const base::FilePath& file_path,
int64_t expected_file_size,
const std::string& expected_digest);
private:
crypto::hash::Hasher hash_{crypto::hash::HashKind::kSha256};
};
} // namespace offline_pages
#endif // COMPONENTS_OFFLINE_PAGES_CORE_ARCHIVE_VALIDATOR_H_
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