Develop Reference

Httget request using HttpClient 4.5

I'm trying to update a code that uses HttpClient 4.5 to have no deprecated methods, but it was completely impossible to find a solution, I'm totally lost.
This is my code:
public int sendGetHTTP() throws QAException, IOException {
HttpResponse httpResponse = null;
try {
DefaultHttpClient client = new DefaultHttpClient();
InputStream is = new FileInputStream("my");
CertificateFactory cf = CertificateFactory.getInstance("X.509");
X509Certificate caCert = (X509Certificate)cf.generateCertificate(is);
TrustManagerFactory tmf = TrustManagerFactory
.getInstance(TrustManagerFactory.getDefaultAlgorithm());
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(null);
ks.setCertificateEntry("cert", caCert);
tmf.init(ks);
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, tmf.getTrustManagers(), null);
SSLSocketFactory sf = new SSLSocketFactory(sslContext);
sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
Scheme scheme = new Scheme("https", sf, 444);
client.getConnectionManager().getSchemeRegistry().register(scheme);
client.getParams().setParameter(ClientPNames.COOKIE_POLICY, CookiePolicy.BROWSER_COMPATIBILITY);
HttpGet httpGet = new HttpGet("https://mysite:444/en.html");
httpGet.addHeader("SSO-EMPLOYEENUMBER", "1234");
httpResponse = client.execute(httpGet);
} catch (Exception e) {
e.printStackTrace();
}
int status = httpResponse.getStatusLine().getStatusCode();
if (status != HTTP_STATUS_OK && status != HTTP_STATUS_CREATED) {
throw new QAException("Server Response: " + status + ": " + httpResponse.getStatusLine().getReasonPhrase());
}
return status;
}
How can I change this code to not have deprecated methods and instances (like the DefaultHttpClient) ?
Is there any useful documentation that I can read ?

Apache maintains a deprecated list
You can check on that list to see what they recommend you replace it with, and the version of the client it was deprecated in.
For DefaultHttpClient, they recommend
org.apache.http.impl.client.DefaultHttpClient (4.3) use
HttpClientBuilder see also CloseableHttpClient.
You can also go to the HttpComponents Home Page which has links to examples and doc's

Making Apache HttpClient 4.3 work with sslSocketFactory/HostnameVerifier

I'm working on a Java program that will send POST requests to a website for my company to use. We do not own this website, they are separate from us. I've been fighting with various ways to actually pass it the very picky parameters it wants in order for me to do work on it from a program (as opposed to doing it manually).
I've found that the Apache HttpClient 4.3 seems to be my best route for actually trying to access it, anything results in a angry response from the website telling me my username and password and not valid/authorized.
But then I got an error because the site certificate doesn't match, I contacted their support and they reportedly share an infrastructure with another site so the certificate mismatch is expected.
So I went commandline and generated a keystore, passed that to the program and then got the error "java.security.cert.CertificateException: No subject alternative DNS name matching".
Some hunting lead me to utilize a verifier, which removed errors.
Then I realized that I can't make URLConnection/HttpsURLConnection and HttpClient/HttpPost work together. That's where I'm stuck. I'm not sure how to make the code that handles my keystore, TrustManager, SSLSocketFactory, etc connect to the part where I actually have to connect and POST.
Code that handles the certificates and verification:
InputStream in = new FileInputStream(new File("C:\\Program Files (x86)\\Java\\jre7\\bin\\my.keystore"));
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(in, "blahblah".toCharArray());
in.close(); TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmf.init(ks);
X509TrustManager defaultTrustManager = (X509TrustManager)tmf.getTrustManagers()[0];
SSLContext context = SSLContext.getInstance("TLS");
context.init(null, new TrustManager[] {defaultTrustManager}, null);
javax.net.ssl.SSLSocketFactory sslSocketFactory = context.getSocketFactory();
URL url = new URL("https://emailer.driveclick.com/dbadmin/xml_post.pl");
URLConnection con = url.openConnection();
((HttpsURLConnection) con).setSSLSocketFactory(sslSocketFactory);
((HttpsURLConnection) con).setHostnameVerifier(new Verifier());
con.connect();
in = con.getInputStream();
Code that should be connecting me to the website:
try {
//log into the website
String url2 = "https://emailer.driveclick.com/dbadmin/xml_post.pl";
HttpClient client = HttpClientBuilder.create().build();
HttpPost post = new HttpPost(url2);
post.setHeader("User-Agent", USER_AGENT);
List<BasicNameValuePair> urlParameters = new ArrayList<>();
urlParameters.add(new BasicNameValuePair("username", "namefoo"));
urlParameters.add(new BasicNameValuePair("api_password", "passfoo"));
post.setEntity(new UrlEncodedFormEntity(urlParameters));
org.apache.http.HttpResponse response = client.execute(post);
System.out.println("\nSending 'POST' request to URL : " + url2);
System.out.println("Post parameters : " + post.getEntity());
System.out.println("Response Code : " + response.getStatusLine().getStatusCode());
BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer result = new StringBuffer();
String line = "";
while ((line = rd.readLine()) != null)
{
result.append(line);
}
System.out.println(result.toString());
} catch (UnsupportedEncodingException ex) {
Logger.getLogger(LastFileMove.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(LastFileMove.class.getName()).log(Level.SEVERE, null, ex);
}
EDIT: I forgot to include the little class I made for the Verifier that I referenced.
public class Verifier implements HostnameVerifier
{
public boolean verify(String arg0, SSLSession arg1) {
return true; // mark everything as verified
}
}
Update 5/8/2014
SSLConext and Verifier are now set up like this:
SSLContext sslContext = SSLContexts.custom()
.useTLS()
.loadTrustMaterial(ks)
.build();
X509HostnameVerifier verifier = new AbstractVerifier()
{
#Override
public void verify(final String host, final String[]
cns, final String[] subjectAlts) throws SSLException
{
verify(host, cns, subjectAlts, true);
}
};
And I've gone ahead and changed my HttpClient to a closeable one here:
CloseableHttpClient client = HttpClients.custom()
sslSocketFactory)
.setHostnameVerifier(verifier)
.setSslcontext(sslContext)
.build();
And I'm back to having "javax.net.ssl.SSLException: hostname in certificate didn't match" errors. Suggestions?

I have no idea how Verifier is implemented but this code snippet demonstrates how one can create a custom hostname verifier none of those shipped with HttpClient fits their needs
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
InputStream in = new FileInputStream(new File("C:\\Program Files (x86)\\Java\\jre7\\bin\\my.keystore"));
try {
ks.load(in, "blahblah".toCharArray());
} finally {
in.close();
}
SSLContext sslContext = SSLContexts.custom()
.useTLS()
.loadTrustMaterial(ks)
.build();
X509HostnameVerifier verifier = new AbstractVerifier() {
#Override
public void verify(final String host, final String[] cns, final String[] subjectAlts) throws SSLException {
verify(host, cns, subjectAlts, true);
}
};
CloseableHttpClient hc = HttpClients.custom()
.setSslcontext(sslContext)
.setHostnameVerifier(verifier)
.build();

Android - How to accept any certificates using HttpClient and passing a certificate at the same time

I have a scenario in which I must pass a certficate to my server, then the server sends me his certificate, which I must accept to access the server. I was using HttpURLConnection for this, with no problems.
However, I recently had a problem with HttpURLConnection. The code I was using retrieved an image from a HTTPS server. If the image was small (< 500kb), no problem whatsoever occured. However, with larger images I got this:
javax.net.ssl.SSLProtocolException: Read error: ssl=0x3c97e8: Failure in SSL library, usually a protocol error
I was reading about it on the Internet, and many people said that using HttpClient instead of HttpURLConnection was the way to go (an example is this site http://soan.tistory.com/62 , think that is written in korean, I can't read it but that's what I think it says).
This is my old code, using URLConnection:
public static URLConnection CreateFromP12(String uri, String keyFilePath,
String keyPass, TrustManager[] trustPolicy, HostnameVerifier hv) {
try {
SSLContext sslContext = SSLContext.getInstance("TLS");
KeyStore keyStore = KeyStore.getInstance("PKCS12");
KeyManagerFactory kmf = KeyManagerFactory.getInstance("X509");
keyStore.load(new FileInputStream(keyFilePath),
keyPass.toCharArray());
kmf.init(keyStore, keyPass.toCharArray());
sslContext.init(kmf.getKeyManagers(), trustPolicy, null);
HttpsURLConnection.setDefaultSSLSocketFactory(sslContext
.getSocketFactory());
HttpsURLConnection.setDefaultHostnameVerifier(hv);
} catch (Exception ex) {
return null;
}
URL url;
URLConnection conn;
try {
url = new URL(uri);
conn = url.openConnection();
} catch (MalformedURLException e) {
return null;
} catch (IOException e) {
return null;
}
return conn;
}
And this is the new one, using HttpClient:
public class HttpC2Connection {
public static HttpEntity CreateHttpEntityFromP12(String uri,
String keyFilePath, String keyPass) throws Exception {
KeyStore keyStore = KeyStore.getInstance("PKCS12");
keyStore.load(new FileInputStream(keyFilePath), keyPass.toCharArray());
SSLSocketFactory sf = new MySSLSocketFactory(keyStore);
sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
HttpParams params = new BasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("https", sf, 443));
ClientConnectionManager ccm = new ThreadSafeClientConnManager(params,
registry);
HttpClient httpclient = new DefaultHttpClient(ccm, params);
HttpGet httpget = new HttpGet(uri);
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
return entity;
}
But now, using HttpClient, my server returns me an error saying that I must pass a certificate, so I guess that
SSLSocketFactory sf = new MySSLSocketFactory(keyStore);
isn't loading my certificate.
So, how can I do the following two things at the same time:
1.) Pass a certificate to my server;
2.) Accept any certificate from my server
Using the HttpClient class?
PS: I'm using Android 3.0
Thanks

The following code disables SSL certificate checking for any new instances of HttpsUrlConnection:
https://gist.github.com/aembleton/889392
/**
* Disables the SSL certificate checking for new instances of {#link HttpsURLConnection} This has been created to
* aid testing on a local box, not for use on production.
*/
private static void disableSSLCertificateChecking() {
TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
#Override
public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
// Not implemented
}
#Override
public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
// Not implemented
}
} };
try {
SSLContext sc = SSLContext.getInstance("TLS");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (KeyManagementException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}

Don't just accept any certificates. Don't use home-made SSLSocketFactory's that compromise security. Use the SSLSocketFactory from the SDK, and pass both a trust store (containing the server certificate or the CA certificate that issued it) and a keystore (containing your client certificate and private key). You can use this constructor to achieve this, the JavaDoc has details on how to create the key stores.

Android: Problem exchanging messages with SSL

I have been trying to get a client to communicate with a server securely through SSL. I created my own self-signed certificates and it seems like that the client can connect to the server using the certificates, but the client never seems to be getting the response from the server. I tried printing the content-length which returns -1 and the actual content seems to be an empty string, although a simple HTML 'hello world' is expected.
What am I doing wrong?
Server:
public class SSLServer {
public static void main(String[] args) {
String ksName = "key.jks";
char ksPass[] = "password".toCharArray();
char ctPass[] = "password".toCharArray();
try {
KeyStore ks = KeyStore.getInstance("JKS");
ks.load(new FileInputStream(ksName), ksPass);
KeyManagerFactory kmf =
KeyManagerFactory.getInstance("SunX509");
kmf.init(ks, ctPass);
SSLContext sc = SSLContext.getInstance("TLS");
sc.init(kmf.getKeyManagers(), null, null);
SSLServerSocketFactory ssf = sc.getServerSocketFactory();
SSLServerSocket s
= (SSLServerSocket) ssf.createServerSocket(8888);
System.out.println("Server started:");
// Listening to the port
SSLSocket c = (SSLSocket) s.accept();
BufferedWriter w = new BufferedWriter(
new OutputStreamWriter(c.getOutputStream()));
w.write("HTTP/1.0 200 OK");
w.write("Content-Type: text/html");
w.write("<html><body>Hello world!</body></html>");
w.flush();
w.close();
c.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Client:
public class TestSSLActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Instantiate the custom HttpClient
DefaultHttpClient client = new MyHttpClient(getApplicationContext());
HttpGet get = new HttpGet("https://192.168.15.195:8888");
// Execute the GET call and obtain the response
HttpResponse getResponse;
try {
getResponse = client.execute(get);
HttpEntity responseEntity = getResponse.getEntity();
Log.i("Connection",responseEntity.getContentLength()+"");
BufferedReader reader = new BufferedReader(new InputStreamReader(responseEntity.getContent(), "UTF-8"));
StringBuilder builder = new StringBuilder();
for (String line = null; (line = reader.readLine()) != null;) {
builder.append(line).append("\n");
}
Log.i("Connection","build: "+builder.toString());
} catch (Exception e) {
Log.i("Connection",e.getMessage());
}
}
Custom HTTP client:
public class MyHttpClient extends DefaultHttpClient {
final Context context;
public MyHttpClient(Context context) {
this.context = context;
}
#Override
protected ClientConnectionManager createClientConnectionManager() {
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
// Register for port 443 our SSLSocketFactory with our keystore
// to the ConnectionManager
registry.register(new Scheme("https", newSslSocketFactory(), 443));
return new SingleClientConnManager(getParams(), registry);
}
private SSLSocketFactory newSslSocketFactory() {
try {
// Get an instance of the Bouncy Castle KeyStore format
KeyStore trusted = KeyStore.getInstance("BKS");
// Get the raw resource, which contains the keystore with
// your trusted certificates (root and any intermediate certs)
InputStream in = context.getResources().openRawResource(R.raw.key);
try {
// Initialize the keystore with the provided trusted certificates
// Also provide the password of the keystore
trusted.load(in, "password".toCharArray());
} finally {
in.close();
}
// Pass the keystore to the SSLSocketFactory. The factory is responsible
// for the verification of the server certificate.
SSLSocketFactory sf = new SSLSocketFactory(trusted);
// Hostname verification from certificate
// http://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html#d4e506
sf.setHostnameVerifier(SSLSocketFactory.STRICT_HOSTNAME_VERIFIER);
return sf;
} catch (Exception e) {
throw new AssertionError(e);
}
}
}

You might want to change the server code to read the request from the client before sending the response. It could be that the client is blocking (and then timing out?) waiting for the server to read the request.

Mutual Authentication with x509 Certificates using HttpClient 4.0.1

Does anyone have any friendly tips on how to perform client authentication via an x509 certificate using HTTPClient 4.0.1?

Here is some code to get you going. The KeyStore is the object that contains the client certificate. If the server is using a self-signed certificate or a certificate that isn't signed by a CA as recognized by the JVM in the included cacerts file then you will need to use a TrustStore. Otherwise to use the default cacerts file, pass in null to SSLSockeFactory for the truststore argument..
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
...
final HttpParams httpParams = new BasicHttpParams();
// load the keystore containing the client certificate - keystore type is probably jks or pkcs12
final KeyStore keystore = KeyStore.getInstance("pkcs12");
InputStream keystoreInput = null;
// TODO get the keystore as an InputStream from somewhere
keystore.load(keystoreInput, "keystorepassword".toCharArray());
// load the trustore, leave it null to rely on cacerts distributed with the JVM - truststore type is probably jks or pkcs12
KeyStore truststore = KeyStore.getInstance("pkcs12");
InputStream truststoreInput = null;
// TODO get the trustore as an InputStream from somewhere
truststore.load(truststoreInput, "truststorepassword".toCharArray());
final SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme("https", new SSLSocketFactory(keystore, keystorePassword, truststore), 443));
final DefaultHttpClient httpClient = new DefaultHttpClient(new ThreadSafeClientConnManager(httpParams, schemeRegistry), httpParams);

Another solution (copied from another example). I've used the same keystore for both 'trusting' (trustStore) and for authenticate myself (keyStore).
KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
FileInputStream instream = new FileInputStream(new File("miller.keystore"));
try {
trustStore.load(instream, "pw".toCharArray());
} finally {
instream.close();
}
SSLContext sslcontext = SSLContexts.custom()
.loadTrustMaterial(trustStore) /* this key store must contain the certs needed & trusted to verify the servers cert */
.loadKeyMaterial(trustStore, "pw".toCharArray()) /* this keystore must contain the key/cert of the client */
.build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext,
SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
CloseableHttpClient httpclient = HttpClients.custom()
.setSSLSocketFactory(sslsf)
.build();
try {
HttpGet httpget = new HttpGet("https://localhost");
System.out.println("executing request" + httpget.getRequestLine());
CloseableHttpResponse response = httpclient.execute(httpget);
try {
HttpEntity entity = response.getEntity();
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
if (entity != null) {
System.out.println("Response content length: " + entity.getContentLength());
}
EntityUtils.consume(entity);
} finally {
response.close();
}
} finally {
httpclient.close();
}

I used the following from a sample code on HttpClient's website (custom SSL context if I remember correctly).
{
KeyStore keyStore = KeyStore.getInstance("PKCS12"); //client certificate holder
FileInputStream instream = new FileInputStream(new File(
"client-p12-keystore.p12"));
try {
trustStore.load(instream, "password".toCharArray());
} finally {
instream.close();
}
// Trust own CA and all self-signed certs
SSLContext sslcontext = SSLContexts.custom()
.loadKeyMaterial(keyStore, "password".toCharArray())
// .loadTrustMaterial(trustStore, new TrustSelfSignedStrategy()) //if you have a trust store
.build();
// Allow TLSv1 protocol only
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
sslcontext, new String[] { "TLSv1" }, null,
SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
CloseableHttpClient httpclient = HttpClients
.custom()
.setHostnameVerifier(
SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER) //todo
.setSSLSocketFactory(sslsf).build();
try {
HttpGet httpget = new HttpGet("https://localhost:8443/secure/index");
System.out.println("executing request" + httpget.getRequestLine());
CloseableHttpResponse response = httpclient.execute(httpget);
try {
HttpEntity entity = response.getEntity();
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
if (entity != null) {
System.out.println("Response content length: "
+ entity.getContentLength());
}
EntityUtils.consume(entity);
} finally {
response.close();
}
} finally {
httpclient.close();
}
}