TECrypto.cpp

/*
    Copyright (C) 2021-Present SKALE Labs

    This file is part of sgxwallet.

    sgxwallet is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    sgxwallet is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with sgxwallet. If not, see <https://www.gnu.org/licenses/>.

    @file TECrypto.cpp
    @author Oleh Nikolaiev
    @date 2021
*/

#include "leveldb/db.h"
#include <jsonrpccpp/server/connectors/httpserver.h>
#include <memory>

#include "threshold_encryption/threshold_encryption.h"

#include "SGXException.h"
#include "SGXWalletServer.h"
#include "common.h"
#include "sgxwallet.h"
#include "sgxwallet_common.h"
#include "third_party/spdlog/spdlog.h"

#include "CryptoTools.h"
#include "TECrypto.h"

#include <tools/utils.h>

vector<string> calculateDecryptionShare(const string &encryptedKeyShare,
                                        const string &publicDecryptionValue) {
  size_t sz = 0;

  SAFE_UINT8_BUF(encryptedKey, BUF_LEN);

  bool result =
      hex2carray(encryptedKeyShare.data(), &sz, encryptedKey, BUF_LEN);

  if (!result) {
    BOOST_THROW_EXCEPTION(invalid_argument("Invalid hex encrypted key"));
  }

  SAFE_CHAR_BUF(decryptionShare, BUF_LEN)

  vector<char> errMsg(BUF_LEN, 0);

  int errStatus = 0;

  sgx_status_t status = SGX_SUCCESS;

  status = trustedGetDecryptionShare(eid, &errStatus, errMsg.data(),
                                     encryptedKey, publicDecryptionValue.data(),
                                     sz, decryptionShare);

  HANDLE_TRUSTED_FUNCTION_ERROR(status, errStatus, errMsg.data());

  auto splittedShare = libBLS::ThresholdUtils::SplitString(
      std::make_shared<std::string>(decryptionShare), ":");

  return *splittedShare;
}