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(Android™) How to Parse a X.509 Certificate and Extract its Public KeyDemonstrates how to load an X.509 certificate and extract the public key. Chilkat supports many certificate encodings:
// 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); CkCert cert = new CkCert(); // Load a DER (binary) encoded certificate. // To load from a .pem or .p7b, or any other file format that contains // just one certificate, call LoadFromFile in exactly the same way. // The LoadFromFile method automatically detects the format and loads the certificate. boolean success = cert.LoadFromFile("qa_data/certs/testCert.cer"); if (success == false) { Log.i(TAG, cert.lastErrorText()); return; } // Get the public key: CkPublicKey pubKey = cert.ExportPublicKey(); if (cert.get_LastMethodSuccess() != true) { Log.i(TAG, cert.lastErrorText()); return; } // Examine the key type. // A PublicKey object can contain an RSA, ECC, or DSA public key. // The KeyType property will contain "rsa", "ecc", or "dsa". Log.i(TAG, "key type = " + pubKey.keyType()); } 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." } } |
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