// Copyright 2023 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine License
// Agreement.

#ifndef BCC_PARSER_H_
#define BCC_PARSER_H_

#include <cppbor.h>
#include <stddef.h>
#include <stdint.h>

#include <sstream>
#include <string>
#include <utility>
#include <vector>

namespace widevine {

// BccParser processes a Provisioning 4.0 device root of trust. It extracts
// relevant pieces of information and outputs to std::string.
// Relevant documents:
// Android definition: go/remote-provisioning-hal#bcc.
// Google Dice Profile: go/dice-profile
class BccParser {
 public:
  explicit BccParser() {}
  virtual ~BccParser() = default;
  BccParser(const BccParser&) = delete;
  BccParser& operator=(const BccParser&) = delete;
  // Parse and verify a client generated root of trust. This message is part of
  // an attestation model conforming to the Google Open Dice Profile. This
  // message is received from a client device to attest it is a valid Widevine
  // device.
  virtual std::string Parse(const std::vector<uint8_t>& bcc);

 private:
  // Process and print CoseKey PubKeyEd25519 / PubKeyECDSA256.
  bool ProcessDevicePublicKeyInfo(std::stringstream& ss,
                                  const cppbor::Map& public_key_info_map);

  // Process and print the DiceChainEntryPayload, which contains subject public
  // key.
  bool ProcessDiceChainEntryPayload(std::stringstream& ss,
                                    std::string& payload);
};

}  // namespace widevine

#endif  // BCC_PARSER_H_