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// Copyright 2024 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_WEB_PACKAGE_SIGNED_WEB_BUNDLES_SIGNATURE_ENTRY_PARSER_H_
#define COMPONENTS_WEB_PACKAGE_SIGNED_WEB_BUNDLES_SIGNATURE_ENTRY_PARSER_H_
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "base/types/expected.h"
#include "components/web_package/mojom/web_bundle_parser.mojom.h"
#include "components/web_package/signed_web_bundles/attribute_map_parser.h"
#include "components/web_package/signed_web_bundles/types.h"
namespace web_package {
// This class is responsible for parsing a single signature entry from the
// signature stack of the integrity block of a signed web bundle.
class SignatureStackEntryParser {
public:
// In case of success the callback returns the signature stack entry and the
// offset in the stream corresponding to the end of the entry.
using SignatureEntryParsedCallback = base::OnceCallback<void(
base::expected<
std::pair<mojom::BundleIntegrityBlockSignatureStackEntryPtr,
uint64_t>,
std::string>)>;
explicit SignatureStackEntryParser(mojom::BundleDataSource& data_source,
SignatureEntryParsedCallback callback);
~SignatureStackEntryParser();
void Parse(uint64_t offset);
private:
void ReadSignatureStructure(const std::optional<BinaryData>& data);
void GetAttributesMap(AttributeMapParser::ParsingResult result);
void ReadAttributesMapBytes(uint64_t num_bytes,
const std::optional<BinaryData>& data);
void ReadSignatureHeader(const std::optional<BinaryData>& data);
void ReadSignatureValue(const std::optional<BinaryData>& data);
void EvaluateSignatureEntry(BinaryData data);
void RunErrorCallback(std::string message);
mojom::BundleIntegrityBlockSignatureStackEntryPtr signature_stack_entry_;
AttributesMap attributes_map_;
std::unique_ptr<AttributeMapParser> attribute_map_parser_;
uint64_t offset_in_stream_;
const raw_ref<mojom::BundleDataSource> data_source_;
SignatureEntryParsedCallback callback_;
base::WeakPtrFactory<SignatureStackEntryParser> weak_factory_{this};
};
} // namespace web_package
#endif // COMPONENTS_WEB_PACKAGE_SIGNED_WEB_BUNDLES_SIGNATURE_ENTRY_PARSER_H_
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