DecryptDbeaver.java

import javax.crypto.*;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.security.*;

public class DecryptDbeaver {

  // from the DBeaver source 8/23/19 https://github.com/dbeaver/dbeaver/blob/57cec8ddfdbbf311261ebd0c7f957fdcd80a085f/plugins/org.jkiss.dbeaver.model/src/org/jkiss/dbeaver/model/impl/app/DefaultSecureStorage.java#L31
  private static final byte[] LOCAL_KEY_CACHE = new byte[] { -70, -69, 74, -97, 119, 74, -72, 83, -55, 108, 45, 101, 61, -2, 84, 74 };

  public static void main(String[] args) throws Exception {
    if (args.length != 1) {
      System.err.println("syntax: param1: full path to your credentials-config.json file");
      System.exit(1);
    }
    System.out.println(decrypt(Files.readAllBytes(Paths.get(args[0]))));
  }
  static String decrypt(byte[] contents) throws InvalidAlgorithmParameterException, InvalidKeyException, IOException, NoSuchPaddingException, NoSuchAlgorithmException {
    try (InputStream byteStream = new ByteArrayInputStream(contents)) {
      byte[] fileIv = new byte[16];
      byteStream.read(fileIv);
      Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
      SecretKey aes = new SecretKeySpec(LOCAL_KEY_CACHE, "AES");
      cipher.init(Cipher.DECRYPT_MODE, aes, new IvParameterSpec(fileIv));
      try (CipherInputStream cipherIn = new CipherInputStream(byteStream, cipher)) {
        return inputStreamToString(cipherIn);
      }
    }
  }

  static String inputStreamToString(java.io.InputStream is) {
    java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
    return s.hasNext() ? s.next() : "";
  }



}