CertTool.java revision 41d8565e816a29192d966f271c06bee91272087c 
1/*
2 * Copyright (C) 2009 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
17package android.webkit;
18
19import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
20import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
21import org.bouncycastle.jce.netscape.NetscapeCertRequest;
22import org.bouncycastle.util.encoders.Base64;
23
24import android.content.ActivityNotFoundException;
25import android.content.Context;
26import android.content.Intent;
27import android.security.Credentials;
28import android.util.Log;
29
30import java.security.KeyPair;
31import java.security.KeyPairGenerator;
32
33class CertTool {
34    private static final String LOGTAG = "CertTool";
35
36    private static final AlgorithmIdentifier MD5_WITH_RSA =
37            new AlgorithmIdentifier(PKCSObjectIdentifiers.md5WithRSAEncryption);
38
39    static final String[] KEY_STRENGTH_LIST = {"High Grade", "Medium Grade"};
40
41    static final String CERT = Credentials.CERTIFICATE;
42    static final String PKCS12 = Credentials.PKCS12;
43
44    static String getSignedPublicKey(Context context, int index, String challenge) {
45        try {
46            KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
47            generator.initialize((index == 0) ? 2048 : 1024);
48            KeyPair pair = generator.genKeyPair();
49
50            NetscapeCertRequest request = new NetscapeCertRequest(challenge,
51                    MD5_WITH_RSA, pair.getPublic());
52            request.sign(pair.getPrivate());
53            byte[] signed = request.toASN1Object().getDEREncoded();
54
55            Credentials.getInstance().install(context, pair);
56            return new String(Base64.encode(signed));
57        } catch (Exception e) {
58            Log.w(LOGTAG, e);
59        }
60        return null;
61    }
62
63    static void addCertificate(Context context, String type, byte[] value) {
64        Credentials.getInstance().install(context, type, value);
65    }
66
67    private CertTool() {}
68}
69