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Using a self-signed certificate to create a secure client-server connection in android

There is different ways to solve your problem but here is the one I use: All the steps are in this link http://blog.antoine.li/2010/10/22/android-trusting-ssl-certificates/ but some parts can be confused so I will explain all the process:

1.-Store your mycrtfile.crt in a know path I will say c:BKS/mycrtfile.crt.

2.-To create your BKS or key store you will need the file bcprov-jdk15on-146.jar, this class will do all the work for us, there are different versions but this one works for me http://www.bouncycastle.org/download/bcprov-jdk15on-146.jar also store this file into C:BKS/

3.-Now you will use the Keytool (keytool comes with the Java SDK. You should find it in the directory that contains javac) to generate our keystore and to make sure that is working go to your cmd and type "Keytool", you will see the available commands which means is working, or you can access trough "C:Program Files (x86)Javajre7in>keytool".

4.-Now that everything is in place we can generate the keystore with this command line:

keytool -importcert -v -trustcacerts -file "c:BKS/mycrtfile.crt" -alias certificate -keystore "c:BKS/keystore.bks" -provider org.bouncycastle.jce.provider.BouncyCastleProvider -providerpath "c:BKS/prov-jdk15on-146.jar" -storetype BKS -storepass mysecret

Lets see what is in this line (I was really confused in this part): -"c:BKS/mycrtfile.crt" : this is the path to your certificate. -"c:BKS/keystore.bks" this is the path where we will store the keystore and you can change the out-put name I use keystore, just make sure that the extension file is .bks -"c:BKS/prov-jdk15on-146.jar": this is the path to our file that will do all the job. -mysecret: this is the password to use the key store you will need this password so don't forget about this.

EDITED:
4.1- Also use this command line to Verify if the certificate were imported correctly into the keystore:

keytool -list -keystore "res/raw/Keystore.bks" -provider org.bouncycastle.jce.provider.BouncyCastleProvider -providerpath "c:BKS/prov-jdk15on-146.jar" -storetype BKS -storepass mysecret

4.2- After this you should see a output like this:

RootCA, 22.10.2010, trustedCertEntry, Thumbprint (MD5): 24:77:D9:A8:91:D1:3B:FA:88:2D:C2:FF:F8:CD:33:93 IntermediateCA, 22.10.2010, trustedCertEntry, Thumbprint (MD5): 98:0F:C3:F8:39:F7:D8:05:07:02:0D:E3:14:5B:29:43
Which means it was imported correctly.

5.- After this if you go to your BKS folder you will se a Keystore.bks file which means we are on the way.

6.- Now lets go to the ANDROID part. IN your project check if you have the "raw" folder it has to be in Yourproject/res/raw if not create this folder under res.

7.-copy your Keystore.bks file in to the raw folder. Everything is on place now lets go to the code.

8.--- Now we will create a class to read and trust our Keystore:

import java.io.InputStream;
import java.security.KeyStore;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
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.SingleClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;

import com.futureconcepts.anonymous.R;
import android.content.Context;


public class Client extends  DefaultHttpClient   {
final Context context;
  public Client(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));

    HttpParams httpParams = new BasicHttpParams();
     HttpConnectionParams.setConnectionTimeout(httpParams,9000);
     HttpConnectionParams.setSoTimeout(httpParams, 9000);

      return new SingleClientConnManager(httpParams, registry);
  }


  private SSLSocketFactory newSslSocketFactory() {
      try {

          // Get an instance of the Bouncy Castle KeyStore format
            KeyStore trusted = KeyStore.getInstance("BKS");//put BKS
literal  
            // Get the raw resource, which contains the keystore with
            // your trusted certificates (root and any intermediate certs)
            InputStream in
=context.getResources().openRawResource(R.raw.keystore);
            try {
                // Initialize the keystore with the provided trusted
certificates
                // Also provide the password of the keystore
                trusted.load(in, "mysecret".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

          
sf.setHostnameVerifier(SSLSocketFactory.STRICT_HOSTNAME_VERIFIER);
          return sf;
      } catch (Exception e) {
          throw new AssertionError(e);
      }
  }

}

9.And we done now to make a request just do this: HttpClient client= new Client(this); ///setupo your Httpclient.

That's it now you will only trust your certificate. I hope this explanation help you or any one with the same problem.





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