Program: 58678
Project: 58678
Buggy source:
/** 
 * Sends encryption and authentication keys to the bank. This order is only allowed for a new user at the bank side that has been created by copying the A005 key. The keys will be activated immediately after successful completion of the transfer.
 * @param orderId the order ID. Let it null to generate a random one.
 * @throws IOException communication error
 * @throws GeneralSecurityException data decryption error
 * @throws AxelorException 
 * @throws JDOMException 
 * @throws EbicsException server generated error message
 */
public void sendHPB() throws IOException, GeneralSecurityException, AxelorException, JDOMException {
  HPBRequestElement request;
  KeyManagementResponseElement response;
  HttpRequestSender sender;
  HPBResponseOrderDataElement orderData;
  ContentFactory factory;
  KeyStoreManager keystoreManager;
  RSAPublicKey e002PubKey;
  RSAPublicKey x002PubKey;
  int httpCode;
  sender=new HttpRequestSender(session);
  request=new HPBRequestElement(session);
  request.build();
  request.validate();
  httpCode=sender.send(new ByteArrayContentFactory(request.prettyPrint()));
  Utils.checkHttpCode(httpCode);
  response=new KeyManagementResponseElement(sender.getResponseBody(),"String_Node_Str");
  response.build();
  response.report();
  EbicsUserService userService=Beans.get(EbicsUserService.class);
  factory=new ByteArrayContentFactory(Utils.unzip(userService.decrypt(session.getUser(),response.getOrderData(),response.getTransactionKey())));
  orderData=new HPBResponseOrderDataElement(factory);
  orderData.build();
  keystoreManager=new KeyStoreManager();
  keystoreManager.load("String_Node_Str",session.getUser().getPassword().toCharArray());
  e002PubKey=keystoreManager.getPublicKey(new ByteArrayInputStream(orderData.getBankE002Certificate()));
  x002PubKey=keystoreManager.getPublicKey(new ByteArrayInputStream(orderData.getBankX002Certificate()));
  EbicsBank bank=session.getUser().getEbicsPartner().getEbicsBank();
  bank.setE002Digest(KeyUtil.getKeyDigest(e002PubKey));
  bank.setX002Digest(KeyUtil.getKeyDigest(x002PubKey));
  bank.setE002KeyExponent(e002PubKey.getPublicExponent().toString());
  bank.setE002KeyModulus(e002PubKey.getModulus().toString());
  bank.setX002KeyExponent(x002PubKey.getPublicExponent().toString());
  bank.setX002KeyModulus(x002PubKey.getModulus().toString());
  keystoreManager.setCertificateEntry(session.getBankID() + "String_Node_Str",new ByteArrayInputStream(orderData.getBankE002Certificate()));
  keystoreManager.setCertificateEntry(session.getBankID() + "String_Node_Str",new ByteArrayInputStream(orderData.getBankX002Certificate()));
}

Fixed version (ground truth):
/** 
 * Sends encryption and authentication keys to the bank. This order is only allowed for a new user at the bank side that has been created by copying the A005 key. The keys will be activated immediately after successful completion of the transfer.
 * @param orderId the order ID. Let it null to generate a random one.
 * @throws IOException communication error
 * @throws GeneralSecurityException data decryption error
 * @throws AxelorException 
 * @throws JDOMException 
 * @throws EbicsException server generated error message
 */
public void sendHPB(File certFile) throws IOException, GeneralSecurityException, AxelorException, JDOMException {
  HPBRequestElement request;
  KeyManagementResponseElement response;
  HttpRequestSender sender;
  HPBResponseOrderDataElement orderData;
  ContentFactory factory;
  KeyStoreManager keystoreManager;
  RSAPublicKey e002PubKey;
  RSAPublicKey x002PubKey;
  int httpCode;
  sender=new HttpRequestSender(session);
  request=new HPBRequestElement(session);
  request.build();
  request.validate();
  httpCode=sender.send(new ByteArrayContentFactory(request.prettyPrint()),certFile);
  Utils.checkHttpCode(httpCode);
  response=new KeyManagementResponseElement(sender.getResponseBody(),"String_Node_Str");
  response.build();
  response.report();
  EbicsUserService userService=Beans.get(EbicsUserService.class);
  factory=new ByteArrayContentFactory(Utils.unzip(userService.decrypt(session.getUser(),response.getOrderData(),response.getTransactionKey())));
  orderData=new HPBResponseOrderDataElement(factory);
  orderData.build();
  keystoreManager=new KeyStoreManager();
  keystoreManager.load("String_Node_Str",session.getUser().getPassword().toCharArray());
  e002PubKey=keystoreManager.getPublicKey(new ByteArrayInputStream(orderData.getBankE002Certificate()));
  x002PubKey=keystoreManager.getPublicKey(new ByteArrayInputStream(orderData.getBankX002Certificate()));
  EbicsBank bank=session.getUser().getEbicsPartner().getEbicsBank();
  bank.setE002Digest(KeyUtil.getKeyDigest(e002PubKey));
  bank.setX002Digest(KeyUtil.getKeyDigest(x002PubKey));
  bank.setE002KeyExponent(e002PubKey.getPublicExponent().toString());
  bank.setE002KeyModulus(e002PubKey.getModulus().toString());
  bank.setX002KeyExponent(x002PubKey.getPublicExponent().toString());
  bank.setX002KeyModulus(x002PubKey.getModulus().toString());
  keystoreManager.setCertificateEntry(session.getBankID() + "String_Node_Str",new ByteArrayInputStream(orderData.getBankE002Certificate()));
  keystoreManager.setCertificateEntry(session.getBankID() + "String_Node_Str",new ByteArrayInputStream(orderData.getBankX002Certificate()));
}