(Android™) bitzlato.com whoami

Demonstrates sending a request to the bitzlato.com whoami endpoint using an ES256 JWT token for authentication.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    boolean success;

    //  Use the following ECC key loaded from JWK format.
    CkJsonObject jwk = new CkJsonObject();
    success = jwk.UpdateString("kty","EC");
    success = jwk.UpdateString("crv","P-256");
    success = jwk.UpdateString("x","...");
    success = jwk.UpdateString("y","...");
    success = jwk.UpdateString("d","...");

    CkPrivateKey eccKey = new CkPrivateKey();
    success = eccKey.LoadJwk(jwk.emit());
    if (success == false) {
        Log.i(TAG, eccKey.lastErrorText());
        return;
        }

    CkJwt jwt = new CkJwt();

    // Build the JOSE header
    CkJsonObject jose = new CkJsonObject();
    success = jose.AppendString("format","compact");
    success = jose.AppendString("alg","ES256");

    // Now build the JWT claims (also known as the payload)

    // Our JWT claims will contain members as shown here:

    // 	{
    // 	  "email":"your_email@example.com",
    // 	  "aud":"usr",
    // 	  "iat":"1588286154",
    // 	  "jti":"555D9123"
    // 	}

    CkJsonObject claims = new CkJsonObject();
    claims.AppendString("jti","555D9123");
    claims.AppendString("email","your_email@example.com");

    // Set the timestamp of when the JWT was created to now minus 60 seconds
    int curDateTime = jwt.GenNumericDate(-60);
    success = claims.AddIntAt(-1,"iat",curDateTime);

    // Set the "not process before" timestamp to now minus 60 seconds
    success = claims.AddIntAt(-1,"nbf",curDateTime);

    // Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 hour (3600 seconds)
    success = claims.AddIntAt(-1,"exp",curDateTime + 3600);

    claims.AppendString("aud","usr");

    // Produce the smallest possible JWT:
    jwt.put_AutoCompact(true);

    // Create the JWT token.  This is where the RSA signature is created.
    String jwt_token = jwt.createJwtPk(jose.emit(),claims.emit(),eccKey);

    Log.i(TAG, jwt_token);

    // Send the HTTPS GET with the jwt_token used for Authorization.
    CkHttp http = new CkHttp();
    http.put_AuthToken(jwt_token);
    String responseStr = http.quickGetStr("https://bitzlato.com/api/auth/whoami");
    if (http.get_LastMethodSuccess() == false) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    Log.i(TAG, "status code = " + String.valueOf(http.get_LastStatus()));
    Log.i(TAG, responseStr);

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}