fgerlits commented on a change in pull request #886: URL: https://github.com/apache/nifi-minifi-cpp/pull/886#discussion_r488833776
########## File path: encrypt-config/EncryptConfig.cpp ########## @@ -0,0 +1,146 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "EncryptConfig.h" + +#include "cxxopts.hpp" + +#include <stdexcept> + +#include "ConfigFile.h" +#include "utils/file/FileUtils.h" +#include "utils/OptionalUtils.h" + +namespace { +const char* CONF_DIRECTORY_NAME = "conf"; +const char* BOOTSTRAP_FILE_NAME = "bootstrap.conf"; +const char* MINIFI_PROPERTIES_FILE_NAME = "minifi.properties"; +const char* ENCRYPTION_KEY_PROPERTY_NAME = "nifi.bootstrap.sensitive.key"; +const size_t ENCRYPTION_KEY_SIZE = 32; +} // namespace + +namespace org { +namespace apache { +namespace nifi { +namespace minifi { +namespace encrypt_config { + +EncryptConfig::EncryptConfig(int argc, char* argv[]) : minifi_home_(parseMinifiHomeFromTheOptions(argc, argv)) { +} + +std::string EncryptConfig::parseMinifiHomeFromTheOptions(int argc, char* argv[]) { + cxxopts::Options options("encrypt-config", "Encrypt sensitive minifi properties"); + options.add_options() + ("h,help", "Shows help") + ("m,minifi-home", "The MINIFI_HOME directory", cxxopts::value<std::string>()); + + auto parse_result = options.parse(argc, argv); + + if (parse_result.count("help")) { + std::cout << options.help() << '\n'; + std::exit(0); + } + + if (parse_result.count("minifi-home")) { + return parse_result["minifi-home"].as<std::string>(); + } else { + throw std::runtime_error{"Required parameter missing: --minifi-home"}; + } +} + +void EncryptConfig::encryptSensitiveProperties() const { + utils::crypto::Bytes encryption_key = getEncryptionKey(); + encryptSensitiveProperties(encryption_key); +} + +std::string EncryptConfig::bootstrapFilePath() const { + return utils::file::FileUtils::concat_path( + utils::file::FileUtils::concat_path(minifi_home_, CONF_DIRECTORY_NAME), + BOOTSTRAP_FILE_NAME); +} + +std::string EncryptConfig::propertiesFilePath() const { + return utils::file::FileUtils::concat_path( + utils::file::FileUtils::concat_path(minifi_home_, CONF_DIRECTORY_NAME), + MINIFI_PROPERTIES_FILE_NAME); +} + +utils::crypto::Bytes EncryptConfig::getEncryptionKey() const { + encrypt_config::ConfigFile bootstrap_file{bootstrapFilePath()}; + utils::optional<std::string> key_from_bootstrap_file = bootstrap_file.getValue(ENCRYPTION_KEY_PROPERTY_NAME); + + if (key_from_bootstrap_file && !key_from_bootstrap_file->empty()) { + std::string base64_decoded_key = base64DecodeAndValidateKey(*key_from_bootstrap_file); + std::cout << "Using the existing encryption key found in " << bootstrapFilePath() << '\n'; + return utils::crypto::stringToBytes(base64_decoded_key); + } else { + std::cout << "Generating a new encryption key...\n"; + utils::crypto::Bytes encryption_key = utils::crypto::randomBytes(ENCRYPTION_KEY_SIZE); + writeEncryptionKeyToBootstrapFile(encryption_key); + std::cout << "Wrote the new encryption key to " << bootstrapFilePath() << '\n'; + return encryption_key; + } +} + +std::string EncryptConfig::base64DecodeAndValidateKey(const std::string& key) const { + std::string base64_decoded_key = utils::StringUtils::from_base64(key); + if (base64_decoded_key.size() == ENCRYPTION_KEY_SIZE) { + return base64_decoded_key; + } else { + std::stringstream error; + error << "The encryption key\n " << ENCRYPTION_KEY_PROPERTY_NAME << '=' << key << '\n' Review comment: I have removed it. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
