SSLHandshakeException - Chain chain validation failed, how to solve?

Question

in my application I am trying to do a HTTPS POST request to my server. However, I keep getting SSLHandshakeException - Chain chain validation failed, all the time. I tried to send a request using POSTMAN and I got a response from the server. What can be causing this error when I try to send the request from the application?

Here a code snippet where I try to send the post request:

   public static JSONObject getDataLibConfiguration(Context context) throws HttpRequestException {

    int statusCode = 0;

    JSONObject commonInformation;
    HttpsURLConnection connection = null;

    try {

        commonInformation = ConfigurationProcessor.getCommonInformation(context);
        if (commonInformation == null) {
            return null;
        }

        URL url = new URL(BuildConfig.SERVER_CONFIG_URL);
        if (BuildConfig.DEBUG) {
            LogUtils.d(TAG, "url = " + url.getPath());
        }

        connection = getHttpsConnection(url);
        connection.setDoOutput(true);
        connection.setDoInput(true);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        connection.setRequestProperty("Content-Encoding", "gzip");

        byte[] gzipped = HttpUtils.gzip(commonInformation.toString());
        cos = new CountingOutputStream(connection.getOutputStream()); //<-- This is where I get the exception
        cos.write(gzipped);
        cos.flush();

        statusCode = connection.getResponseCode();
        // More code her
 }

private static HttpsURLConnection getHttpsConnection(URL url) throws IOException, GeneralSecurityException {

        HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();

        try {
            SSLContext sslContext = SSLContext.getInstance("TLS");
            MatchDomainTrustManager myTrustManager = new MatchDomainTrustManager(url.getHost());
            TrustManager[] tms = new TrustManager[]{myTrustManager};
            sslContext.init(null, tms, null);
            SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
            connection.setSSLSocketFactory(sslSocketFactory);
        } catch (AssertionError ex) {
            if (BuildConfig.DEBUG) {
                LogFileUtils.e(TAG, "Exception in getHttpsConnection: " + ex.getMessage());
            }
            LogUtils.e(TAG, "Exception: " + ex.toString());
        }
        return connection;
    }

Answer 1

The problem was that the certificate was expired.