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/*
 * Copyright (C) 2012 Square, Inc.
 *
 * 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 com.squareup.okhttp.internal;

import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.security.GeneralSecurityException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.KeyStore;
import java.security.SecureRandom;
import java.security.Security;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.Date;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManagerFactory;
import javax.security.auth.x500.X500Principal;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.x509.X509V3CertificateGenerator;

/**
 * Constructs an SSL context for testing. This uses Bouncy Castle to generate a
 * self-signed certificate for a single hostname such as "localhost".
 *
 * 

The crypto performed by this class is relatively slow. Clients should * reuse SSL context instances where possible. */ public final class SslContextBuilder { static { Security.addProvider(new BouncyCastleProvider()); } private static final long ONE_DAY_MILLIS = 1000L * 60 * 60 * 24; private final String hostName; private long notBefore = System.currentTimeMillis(); private long notAfter = System.currentTimeMillis() + ONE_DAY_MILLIS; /** * @param hostName the subject of the host. For TLS this should be the * domain name that the client uses to identify the server. */ public SslContextBuilder(String hostName) { this.hostName = hostName; } public SSLContext build() throws GeneralSecurityException { char[] password = "password".toCharArray(); // Generate public and private keys and use them to make a self-signed certificate. KeyPair keyPair = generateKeyPair(); X509Certificate certificate = selfSignedCertificate(keyPair); // Put 'em in a key store. KeyStore keyStore = newEmptyKeyStore(password); Certificate[] certificateChain = { certificate }; keyStore.setKeyEntry("private", keyPair.getPrivate(), password, certificateChain); keyStore.setCertificateEntry("cert", certificate); // Wrap it up in an SSL context. KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm()); keyManagerFactory.init(keyStore, password); TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); trustManagerFactory.init(keyStore); SSLContext sslContext = SSLContext.getInstance("TLS"); sslContext.init(keyManagerFactory.getKeyManagers(), trustManagerFactory.getTrustManagers(), new SecureRandom()); return sslContext; } private KeyPair generateKeyPair() throws GeneralSecurityException { KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA", "BC"); keyPairGenerator.initialize(1024, new SecureRandom()); return keyPairGenerator.generateKeyPair(); } /** * Generates a certificate for {@code hostName} containing {@code keyPair}'s * public key, signed by {@code keyPair}'s private key. */ @SuppressWarnings("deprecation") // use the old Bouncy Castle APIs to reduce dependencies. private X509Certificate selfSignedCertificate(KeyPair keyPair) throws GeneralSecurityException { X509V3CertificateGenerator generator = new X509V3CertificateGenerator(); X500Principal issuer = new X500Principal("CN=" + hostName); X500Principal subject = new X500Principal("CN=" + hostName); generator.setSerialNumber(BigInteger.ONE); generator.setIssuerDN(issuer); generator.setNotBefore(new Date(notBefore)); generator.setNotAfter(new Date(notAfter)); generator.setSubjectDN(subject); generator.setPublicKey(keyPair.getPublic()); generator.setSignatureAlgorithm("SHA256WithRSAEncryption"); return generator.generateX509Certificate(keyPair.getPrivate(), "BC"); } private KeyStore newEmptyKeyStore(char[] password) throws GeneralSecurityException { try { KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType()); InputStream in = null; // By convention, 'null' creates an empty key store. keyStore.load(in, password); return keyStore; } catch (IOException e) { throw new AssertionError(e); } } }





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