code: Map<Key<EncryptionService>, EncryptionService> createBindings(CryptoConfig cryptoConfig,
              List<KeyPairConfig> keyPairConfigurations, Map<String, KeyStore> keyStores) {
          Map<Key<EncryptionService>, EncryptionService> encryptionServices = new HashMap<>();
          Map<String, EncryptionServiceFactory> encryptionServiceFactories = new HashMap<>();
  
          if (keyPairConfigurations != null && keyStores != null) {
              for (KeyPairConfig keyPairConfig : keyPairConfigurations) {
                  String keyStoreName = keyPairConfig.getKeyStoreName();
  
                  if (!encryptionServiceFactories.containsKey(keyStoreName)) {
                      EncryptionServiceFactory factory = new EncryptionServiceFactory(cryptoConfig,
                              keyStores.get(keyStoreName));
                      encryptionServiceFactories.put(keyStoreName, factory);
                  }
                  EncryptionServiceFactory serviceFactory = encryptionServiceFactories.get(keyStoreName);
  
                  EncryptionService encryptionService;
                  if (keyPairConfig.getPassword() != null) {
                      encryptionService = serviceFactory.create(keyPairConfig.getAlias(),
                              keyPairConfig.getPassword().toCharArray());
                  } else {
                      encryptionService = serviceFactory.create(keyPairConfig.getAlias());
                  }
  
                  if (keyPairConfig.getQualifier() != null) {
                      encryptionServices.put(createKeyFromQualifier(keyPairConfig.getQualifier()), encryptionService);
                  } else {
                      encryptionServices.put(Key.get(EncryptionService.class, Names.named(keyPairConfig.getAlias())),
                              encryptionService);
                  }
              }
          }
          return encryptionServices;
      }
docs: Creates the encryption service bindings.
  
  @param cryptoConfig          crypto cryptoConfig
  @param keyPairConfigurations the key pairs configurations
  @param keyStores             the key stores instances
  @return the map of Guice Key and EncryptionService instances.