public JCPPrivateKeyEntry getEntry() throws UnrecoverableEntryException, NoSuchAlgorithmException, KeyStoreException {
    ContainerCryptoPro container;

    container = containerRepository.findById(сontainerUuid).orElseThrow(
                () -> new EntityNotFoundException("Not found CryptoPro container: " + spbContainerUuid));

    //Временный логер для тестирования
    log.info("Load container {}, {}, {}", container.getAlias(), container.getContainerName(), container.getUuid());
    
    return (JCPPrivateKeyEntry) (Object) keyStore.getEntry(
            container.getAlias(),
            new KeyStore.PasswordProtection(container.getPassword().toCharArray()));
}

Security.addProvider(new JCP());
Security.addProvider(new CryptoProvider()); // JCryptoP
Security.addProvider(new Provider()); // JTLS

JCPPrivateKeyEntry entry = certificateService.getEntry();
KeyStore keyStore = KeyStore.getInstance("HDImageStore");
keyStore.load(null, null);
keyStore.setKeyEntry("alias", entry.getPrivateKey(), new char[0], entry.getCertificateChain());

//создаем фабрику ключей
KeyManagerFactory clientKeyFactory = KeyManagerFactory.getInstance("GostX509", "JTLS");
clientKeyFactory.init(keyStore, null);

// определяем SSL-контекст для работы с GOST TLS
SSLContext sslContext = SSLContext.getInstance("TLSv1.2", "JTLS");
sslContext.init(clientKeyFactory.getKeyManagers(), new TrustManager[]{trustManager}, null);