Android example source code file (Credentials.java)

This example Android source code file (Credentials.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activitynotfoundexception, android, ca_certificate, content, credentials, intent, keypair, logtag, pkcs12, pkey, private_key, security, string, system_install_action, unlock_action, user_certificate, util, utilities, utils, vpn

The Credentials.java Android example source code

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.security;

import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

import java.security.KeyPair;

/**
 * {@hide}
 */
public class Credentials {
    private static final String LOGTAG = "Credentials";

    public static final String UNLOCK_ACTION = "android.credentials.UNLOCK";

    public static final String INSTALL_ACTION = "android.credentials.INSTALL";

    public static final String SYSTEM_INSTALL_ACTION = "android.credentials.SYSTEM_INSTALL";

    /** Key prefix for CA certificates. */
    public static final String CA_CERTIFICATE = "CACERT_";

    /** Key prefix for user certificates. */
    public static final String USER_CERTIFICATE = "USRCERT_";

    /** Key prefix for user private keys. */
    public static final String USER_PRIVATE_KEY = "USRPKEY_";

    /** Key prefix for VPN. */
    public static final String VPN = "VPN_";

    /** Key prefix for WIFI. */
    public static final String WIFI = "WIFI_";

    /** Data type for public keys. */
    public static final String PUBLIC_KEY = "KEY";

    /** Data type for private keys. */
    public static final String PRIVATE_KEY = "PKEY";

    /** Data type for certificates. */
    public static final String CERTIFICATE = "CERT";

    /** Data type for PKCS12. */
    public static final String PKCS12 = "PKCS12";

    private static Credentials singleton;

    public static Credentials getInstance() {
        if (singleton == null) {
            singleton = new Credentials();
        }
        return singleton;
    }

    public void unlock(Context context) {
        try {
            Intent intent = new Intent(UNLOCK_ACTION);
            context.startActivity(intent);
        } catch (ActivityNotFoundException e) {
            Log.w(LOGTAG, e.toString());
        }
    }

    public void install(Context context, KeyPair pair) {
        try {
            Intent intent = new Intent(INSTALL_ACTION);
            intent.putExtra(PRIVATE_KEY, pair.getPrivate().getEncoded());
            intent.putExtra(PUBLIC_KEY, pair.getPublic().getEncoded());
            context.startActivity(intent);
        } catch (ActivityNotFoundException e) {
            Log.w(LOGTAG, e.toString());
        }
    }

    public void install(Context context, String type, byte[] value) {
        try {
            Intent intent = new Intent(INSTALL_ACTION);
            intent.putExtra(type, value);
            context.startActivity(intent);
        } catch (ActivityNotFoundException e) {
            Log.w(LOGTAG, e.toString());
        }
    }

    public void installFromSdCard(Context context) {
        try {
            context.startActivity(new Intent(INSTALL_ACTION));
        } catch (ActivityNotFoundException e) {
            Log.w(LOGTAG, e.toString());
        }
    }
}