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Android™

Load a Private Key from BinData (Any Format)

See more Private Key Examples

Demonstrates the Chilkat PrivateKey.LoadAnyFormat method, which loads a private key by inspecting the bytes in a BinData. The first argument is the BinData and the second is the password (used if the detected key is encrypted).

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own key file.

Background: When you have key bytes in memory but do not know their exact format — downloaded, decrypted, or pulled from a database — this figures it out for you, recognizing PKCS #1/#8 DER, encrypted PKCS #8, PEM, JWK, Chilkat XML, Microsoft formats, and more. It removes the guesswork of choosing a specific loader, at the small cost of the detection step. Supply the password so it can decrypt an encrypted key without a second call.

Chilkat Android™ Downloads

Android™
// 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);

    boolean success = false;

    //  Demonstrates the PrivateKey.LoadAnyFormat method, which loads a private key by inspecting the
    //  bytes in a BinData.  The 1st argument is the BinData and the 2nd is the password (used if the
    //  detected key is encrypted).

    CkBinData bd = new CkBinData();
    success = bd.LoadFile("qa_data/some_private_key");
    if (success == false) {
        Log.i(TAG, bd.lastErrorText());
        return;
        }

    CkPrivateKey privKey = new CkPrivateKey();

    //  The key password is not hard-coded in a real application; obtain it from an interactive
    //  prompt, environment variable, or a secrets vault.
    String password = "myKeyPassword";

    //  Chilkat auto-detects the representation: PKCS #1/#8 DER, encrypted PKCS #8, PEM, JWK,
    //  Chilkat XML, Microsoft formats, and more.
    success = privKey.LoadAnyFormat(bd,password);
    if (success == false) {
        Log.i(TAG, privKey.lastErrorText());
        return;
        }

    Log.i(TAG, "Loaded a " + privKey.keyType() + " private key.");

  }

  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."
  }
}