adamdebreceni commented on a change in pull request #1123: URL: https://github.com/apache/nifi-minifi-cpp/pull/1123#discussion_r666773086
########## File path: libminifi/src/utils/ChecksumCalculator.cpp ########## @@ -0,0 +1,96 @@ +/** + * 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 "utils/ChecksumCalculator.h" + +#include <fstream> + +#include "sodium/crypto_hash_sha256.h" +#include "utils/file/FileUtils.h" +#include "utils/StringUtils.h" + +namespace { + +const std::string AGENT_IDENTIFIER_KEY = "nifi.c2.agent.identifier="; + +} + +namespace org { +namespace apache { +namespace nifi { +namespace minifi { +namespace utils { + +void ChecksumCalculator::setFileLocation(const std::string& file_location) { + file_location_ = file_location; + file_name_ = utils::file::get_child_path(file_location); +} + +std::string ChecksumCalculator::getFileName() const { + if (!file_name_) { + throw std::logic_error("File name not set in ChecksumCalculator!"); + } + return *file_name_; +} + +std::string ChecksumCalculator::getChecksum() { + if (!file_location_) { + throw std::logic_error("File location not set in ChecksumCalculator!"); + } + if (!checksum_) { + checksum_ = computeChecksum(*file_location_); + } + return *checksum_; +} + +std::string ChecksumCalculator::computeChecksum(const std::string& file_location) { + using org::apache::nifi::minifi::utils::StringUtils; + + std::ifstream input_file{file_location, std::ios::in | std::ios::binary}; + if (!input_file.is_open()) { + throw std::runtime_error(StringUtils::join_pack("Could not open config file '", file_location, "' to compute the checksum: ", std::strerror(errno))); + } + + crypto_hash_sha256_state state; + crypto_hash_sha256_init(&state); + + std::string line; + while (std::getline(input_file, line)) { + // skip lines containing the agent identifier, so agents in the same class will have the same checksum + if (StringUtils::startsWith(line, AGENT_IDENTIFIER_KEY)) { + continue; + } + if (!input_file.eof()) { // eof() means we have just read the last line, which was not terminated by a newline + line.append("\n"); + } + crypto_hash_sha256_update(&state, reinterpret_cast<const unsigned char*>(line.data()), line.size()); + } + if (input_file.bad()) { Review comment: do we care about `fail()`? -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
