Home | History | Annotate | Download | only in utility 
      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 
     18 package com.android.emailcommon.utility;
     19 
     20 import android.app.Activity;
     21 import android.content.Intent;
     22 import android.net.Uri;
     23 import android.os.Bundle;
     24 import android.security.KeyChain;
     25 import android.security.KeyChainAliasCallback;
     26 
     27 /**
     28  * A headless Activity which simply calls into the framework {@link KeyChain} service to select
     29  * a certificate to use for establishing secure connections in the Email app.
     30  */
     31 public class CertificateRequestor extends Activity implements KeyChainAliasCallback {
     32     public static final String EXTRA_HOST = "CertificateRequestor.host";
     33     public static final String EXTRA_PORT = "CertificateRequestor.port";
     34 
     35     public static final String RESULT_ALIAS = "CertificateRequestor.alias";
     36 
     37     public static final Uri CERTIFICATE_REQUEST_URI =
     38             Uri.parse("eas://com.android.emailcommon/certrequest");
     39 
     40     @Override
     41     protected void onCreate(Bundle savedInstanceState) {
     42         super.onCreate(savedInstanceState);
     43 
     44         Intent i = getIntent();
     45         String host = i.getStringExtra(EXTRA_HOST);
     46         int port = i.getIntExtra(EXTRA_PORT, -1);
     47 
     48         if (savedInstanceState == null) {
     49             KeyChain.choosePrivateKeyAlias(
     50                     this, this,
     51                     null /* keytypes */, null /* issuers */,
     52                     host, port,
     53                     null /* alias */);
     54         }
     55     }
     56 
     57     /**
     58      * Callback for the certificate request. Does not happen on the UI thread.
     59      */
     60     @Override
     61     public void alias(String alias) {
     62         if (alias == null) {
     63             setResult(RESULT_CANCELED);
     64         } else {
     65             Intent data = new Intent();
     66             data.putExtra(RESULT_ALIAS, alias);
     67             setResult(RESULT_OK, data);
     68         }
     69         finish();
     70     }
     71 }
     72