@j2blasco/ts-env/dist/index.js

A TypeScript utility for securely managing environment variables through file encryption and runtime loading

// src/env/set-env-vars.ts
import * as fs2 from "fs";
import * as os from "os";
import * as path from "path";

// src/env/encrypt-file.ts
import * as fs from "fs";
import * as crypto from "crypto";
var ALGORITHM = "aes-128-cbc";
var KEY_LENGTH = 16;
var IV_LENGTH = 16;
var MARKER = Buffer.from("ENCRYPTED");
function decryptFile(inputPath, outputPath, key) {
  try {
    const keyBuffer = Buffer.from(key, "utf-8").subarray(0, KEY_LENGTH);
    const input = fs.readFileSync(inputPath);
    const marker = input.subarray(0, MARKER.length);
    if (!marker.equals(MARKER)) {
      fs.writeFileSync(outputPath, input);
      return;
    }
    const iv = input.subarray(MARKER.length, MARKER.length + IV_LENGTH);
    const encryptedText = input.subarray(MARKER.length + IV_LENGTH);
    const decipher = crypto.createDecipheriv(ALGORITHM, keyBuffer, iv);
    const decrypted = Buffer.concat([
      decipher.update(encryptedText),
      decipher.final()
    ]);
    fs.writeFileSync(outputPath, decrypted);
  } catch (error) {
    console.error("Decryption failed:", error);
  }
}

// src/env/set-env-vars.ts
function getEnvKeyEnvironmentVariable(envType) {
  return `ENV_${envType.toUpperCase().replace(/-/g, "_")}_KEY`;
}
async function setEnvironment(args) {
  return new Promise(async (resolve, reject) => {
    const envTypeInput = args?.envType ?? process.env.ENV_TYPE ?? "";
    const envType = envTypeInput;
    const envFileName = `env.${envType}.json`;
    const envFilePath = `${args.envPath}/${envFileName}`;
    const tempDir = fs2.mkdtempSync(path.join(os.tmpdir(), "system-env-"));
    const decryptedEnvPath = path.join(tempDir, envFileName);
    try {
      const key = process.env[getEnvKeyEnvironmentVariable(envType)];
      if (!key) {
        throw new Error(`${getEnvKeyEnvironmentVariable(envType)} is not set`);
      }
      decryptFile(envFilePath, decryptedEnvPath, key);
      fs2.readFile(decryptedEnvPath, "utf8", (err, data) => {
        if (err) {
          console.error(
            `[Environment-Variables] Error reading file from disk - ${envType}: ${err}`
          );
          reject(err);
        } else {
          try {
            const envConfig = JSON.parse(data);
            for (const key2 in envConfig) {
              if (envConfig.hasOwnProperty(key2)) {
                process.env[key2] = envConfig[key2];
              }
            }
            resolve();
          } catch (err2) {
            console.error(
              `[Environment-Variables] Error parsing JSON string - ${envType}: ${err2}`
            );
            reject(err2);
          }
        }
      });
    } catch (err) {
      console.error(
        `[Environment-Variables] Error decrypting file - ${envType}: ${err}`
      );
      reject(err);
    }
  });
}
export {
  setEnvironment
};