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 com.android.org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
20import com.android.org.bouncycastle.asn1.x509.AlgorithmIdentifier;
21import com.android.org.bouncycastle.jce.netscape.NetscapeCertRequest;
22import com.android.org.bouncycastle.util.encoders.Base64;
23
24import android.content.Context;
25import android.security.Credentials;
26import android.security.KeyChain;
27import android.util.Log;
28
29import java.security.KeyPair;
30import java.security.KeyPairGenerator;
31import java.util.HashMap;
32
33final class CertTool {
34    private static final String LOGTAG = "CertTool";
35
36    private static final AlgorithmIdentifier MD5_WITH_RSA =
37            new AlgorithmIdentifier(PKCSObjectIdentifiers.md5WithRSAEncryption);
38
39    private static HashMap<String, String> sCertificateTypeMap;
40    static {
41        sCertificateTypeMap = new HashMap<String, String>();
42        sCertificateTypeMap.put("application/x-x509-ca-cert", KeyChain.EXTRA_CERTIFICATE);
43        sCertificateTypeMap.put("application/x-x509-user-cert", KeyChain.EXTRA_CERTIFICATE);
44        sCertificateTypeMap.put("application/x-pkcs12", KeyChain.EXTRA_PKCS12);
45    }
46
47    static String[] getKeyStrengthList() {
48        return new String[] {"High Grade", "Medium Grade"};
49    }
50
51    static String getSignedPublicKey(Context context, int index, String challenge) {
52        try {
53            KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
54            generator.initialize((index == 0) ? 2048 : 1024);
55            KeyPair pair = generator.genKeyPair();
56
57            NetscapeCertRequest request = new NetscapeCertRequest(challenge,
58                    MD5_WITH_RSA, pair.getPublic());
59            request.sign(pair.getPrivate());
60            byte[] signed = request.toASN1Object().getDEREncoded();
61
62            Credentials.getInstance().install(context, pair);
63            return new String(Base64.encode(signed));
64        } catch (Exception e) {
65            Log.w(LOGTAG, e);
66        }
67        return null;
68    }
69
70    static void addCertificate(Context context, String type, byte[] value) {
71        Credentials.getInstance().install(context, type, value);
72    }
73
74    static String getCertType(String mimeType) {
75        return sCertificateTypeMap.get(mimeType);
76    }
77
78    private CertTool() {}
79}
80