code: private String decrypt(String value) {
          Crypto crypto = new Crypto(this);
          
          String keyFile = System.getProperty(Key.APPLICATION_PRIVATEKEY.toString());
          if (StringUtils.isNotBlank(keyFile)) {
              try (Stream<String> lines = Files.lines(Paths.get(keyFile))) { //NOSONAR KeyFile can intentionally come from user input
                  String key = lines.findFirst().orElse(null);
                  if (StringUtils.isNotBlank(key)) {
                      PrivateKey privateKey = crypto.getPrivateKeyFromString(key);
                      String cryptex = StringUtils.substringBetween(value, CRYPTEX_TAG, "}");
  
                      if (privateKey != null && StringUtils.isNotBlank(cryptex)) {
                          return crypto.decrypt(cryptex, privateKey);
                      } else {
                          LOG.error("Failed to decrypt an encrypted config value");
                          this.decrypted = false;
                      }
                  }
              } catch (IOException | SecurityException | MangooEncryptionException e) {
                  LOG.error("Failed to decrypt an encrypted config value", e);
                  this.decrypted = false;
              }
          } else {
              LOG.error("Found an encrypted value in config file but private key for decryption is missing");
              this.decrypted = false;
          }
          
          return "";
      }
docs: Decrypts a given property key and rewrites it to props
  
  @param propKey The property key
  @param propValue The property value