gpg.js

const gpg = require("gpg");

function extractFromKey(key, testRE, extractionIndex) {
  const match = key.match(testRE);
  if (match) {
    return match[extractionIndex];
  }
  return null;
}

function getKeyStatus(expirationDateString) {
  if (expirationDateString === null) {
    return "valid";
  }

  const now = Date.now();
  const weekFromNow = now + 1000 * 60 * 60 * 24 * 7;
  const expirationDate = new Date(expirationDateString).getTime();
  if (expirationDate < now) {
    return "expired";
  }
  if (expirationDate < weekFromNow) {
    return "expiring";
  }
  return "valid";
}

function parseKey(key) {
  const email = extractFromKey(key, /<([^>]+)>/, 1);
  const expirationDateString = extractFromKey(
    key,
    /\[expire[sd]: (\d\d\d\d-\d\d-\d\d)\]/,
    1
  );
  return {
    email,
    status: getKeyStatus(expirationDateString),
  };
}

function parseKeys(listKeysOutput) {
  const keyLines = listKeysOutput.trim().split("\n");
  const pubs = keyLines
    .filter((line) => line.match(/^pub/))
    .map((l) => l.trim());
  const uids = keyLines
    .filter((line) => line.match(/^uid/))
    .map((l) => l.trim());
  const keys = pubs.reduce(
    (memo, curr, index) => memo.concat(curr + uids[index]),
    []
  );
  return keys.map(parseKey);
}

function listKeys(homedir) {
  return new Promise((resolve, reject) => {
    gpg.call("", [`--homedir=${homedir}`, "--list-keys"], (err, result) => {
      if (err) {
        return reject(err);
      }
      return resolve(result.toString());
    });
  });
}

async function getKeys(keyringDir) {
  const listKeysOutput = await listKeys(keyringDir);
  return parseKeys(listKeysOutput);
}

module.exports = {
  getKeys,
};