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
18package com.android.emailcommon.utility;
19
20import android.app.Activity;
21import android.content.Intent;
22import android.os.Bundle;
23import android.security.KeyChain;
24import android.security.KeyChainAliasCallback;
25
26/**
27 * A headless Activity which simply calls into the framework {@link KeyChain} service to select
28 * a certificate to use for establishing secure connections in the Email app.
29 */
30public class CertificateRequestor extends Activity implements KeyChainAliasCallback {
31
32    public static final String ACTION_REQUEST_CERT = "com.android.emailcommon.REQUEST_CERT";
33
34    public static final String EXTRA_HOST = "CertificateRequestor.host";
35    public static final String EXTRA_PORT = "CertificateRequestor.port";
36
37    public static final String RESULT_ALIAS = "CertificateRequestor.alias";
38
39    @Override
40    protected void onCreate(Bundle savedInstanceState) {
41        super.onCreate(savedInstanceState);
42
43        Intent i = getIntent();
44        String host = i.getStringExtra(EXTRA_HOST);
45        int port = i.getIntExtra(EXTRA_PORT, -1);
46
47        KeyChain.choosePrivateKeyAlias(
48                this, this,
49                null /* keytypes */, null /* issuers */,
50                host, port,
51                null /* alias */);
52    }
53
54    /**
55     * Callback for the certificate request. Does not happen on the UI thread.
56     */
57    @Override
58    public void alias(String alias) {
59        if (alias == null) {
60            setResult(RESULT_CANCELED);
61        } else {
62            Intent data = new Intent();
63            data.putExtra(RESULT_ALIAS, alias);
64            setResult(RESULT_OK, data);
65        }
66        finish();
67    }
68}
69