如何在Java 6中使用带有Apache HttpClient的TLS 1.2？

Question

我正在使用Apache HttpClient 3.5和Spring Web Services 2.1.0开发Java 6项目。

My Spring WebServicesTemplate使用apache HttpClient发送WebServices请求。但是，我联系的服务已淘汰了TLS 1.0，转而支持TLS 1.2。 Java 6不支持TLS 1.2。我被带到了bouncycastle，它应该给我TLS 1.2支持。

如何将bouncycastle与Spring或我的HttpClient集成，以便我可以发送支持TLS 1.2的请求？我找到了一个提供扩展SSLSocketFactory的解决方案。但是，HttpClient只接受SSLConnectionSocketFactory。

在短期内升级到Java 8是不可行的，但如果有人能够确认它能解决我的问题，我可以将其作为长期优先事项。

Answer 1

我提出了一个不需要升级到Java 8的解决方案。作为免责声明，我对https安全性知之甚少，而且我确信有一些知识渊博的人可能会注意到这些问题。这个方法需要使用内置的HttpsURLConnection，如果你习惯使用像Unirest这样的东西，甚至是apache HttpClient，这是非常原始的。

首先，您需要将BouncyCastle添加到pom。

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk15on</artifactId>
    <version>1.54</version>
</dependency>

然后您将创建SSLSocketFactory的扩展。警告！此套接字工厂将接受所有证书，因此使用风险自负。

import java.io.*;
import java.net.UnknownHostException;
import java.security.*;
import java.security.cert.*;
import java.util.*;

import javax.net.ssl.*;
import javax.security.cert.X509Certificate;

import org.bouncycastle.crypto.tls.*;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class TLSSocketConnectionFactory extends SSLSocketFactory {

    static {
        if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {
            Security.addProvider(new BouncyCastleProvider());
        }
    }

    @Override
    public Socket createSocket(Socket socket, final String host, int port,
            boolean arg3) throws IOException {
        if (socket == null) {
            socket = new Socket();
        }
        if (!socket.isConnected()) {
            socket.connect(new InetSocketAddress(host, port));
        }

        final TlsClientProtocol tlsClientProtocol = new     TlsClientProtocol(socket.getInputStream(), socket.getOutputStream(), new     SecureRandom());

        return _createSSLSocket(host, tlsClientProtocol);
    }

    @Override public String[] getDefaultCipherSuites() { return null; }
    @Override public String[] getSupportedCipherSuites() { return null; }
    @Override public Socket createSocket(String host, int port) throws IOException, UnknownHostException { throw new UnsupportedOperationException(); }
    @Override public Socket createSocket(InetAddress host, int port) throws IOException { throw new UnsupportedOperationException(); }
    @Override public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException, UnknownHostException { return null; }
    @Override public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException { throw new UnsupportedOperationException(); }

    private SSLSocket _createSSLSocket(final String host, final TlsClientProtocol tlsClientProtocol) {
        return new SSLSocket() {
            private java.security.cert.Certificate[] peertCerts;

            @Override public InputStream getInputStream() throws IOException { return tlsClientProtocol.getInputStream(); }
            @Override public OutputStream getOutputStream() throws IOException { return tlsClientProtocol.getOutputStream(); }
            @Override public synchronized void close() throws IOException { tlsClientProtocol.close(); }
            @Override public void addHandshakeCompletedListener( HandshakeCompletedListener arg0) { }
            @Override public boolean getEnableSessionCreation() { return false; }
            @Override public String[] getEnabledCipherSuites() { return null; }
            @Override public String[] getEnabledProtocols() { return null; }
            @Override public boolean getNeedClientAuth() { return false; }

            @Override
            public SSLSession getSession() {
                return new SSLSession() {

                    @Override
                    public int getApplicationBufferSize() {
                        return 0;
                    }

                    @Override public String getCipherSuite() { throw new UnsupportedOperationException(); }
                    @Override public long getCreationTime() { throw new UnsupportedOperationException(); }
                    @Override public byte[] getId() { throw new UnsupportedOperationException(); }
                    @Override public long getLastAccessedTime() { throw new UnsupportedOperationException(); }
                    @Override public java.security.cert.Certificate[] getLocalCertificates() { throw new UnsupportedOperationException(); }
                    @Override public Principal getLocalPrincipal() { throw new UnsupportedOperationException(); }
                    @Override public int getPacketBufferSize() { throw new UnsupportedOperationException(); }
                    @Override public X509Certificate[] getPeerCertificateChain() throws SSLPeerUnverifiedException { return null; }
                    @Override public java.security.cert.Certificate[] getPeerCertificates() throws SSLPeerUnverifiedException { return peertCerts; }
                    @Override public String getPeerHost() { throw new UnsupportedOperationException(); }
                    @Override public int getPeerPort() { return 0; }
                    @Override public Principal getPeerPrincipal() throws SSLPeerUnverifiedException { return null; }
                    @Override public String getProtocol() { throw new UnsupportedOperationException(); }
                    @Override public SSLSessionContext getSessionContext() { throw new UnsupportedOperationException(); }
                    @Override public Object getValue(String arg0) { throw new UnsupportedOperationException(); }
                    @Override public String[] getValueNames() { throw new UnsupportedOperationException(); }
                    @Override public void invalidate() { throw new UnsupportedOperationException(); }
                    @Override public boolean isValid() { throw new UnsupportedOperationException(); }
                    @Override public void putValue(String arg0, Object arg1) { throw new UnsupportedOperationException(); }
                    @Override public void removeValue(String arg0) { throw new UnsupportedOperationException(); }
            };
        }

        @Override public String[] getSupportedProtocols() { return null; }
        @Override public boolean getUseClientMode() { return false; }
        @Override public boolean getWantClientAuth() { return false; }
        @Override public void removeHandshakeCompletedListener(HandshakeCompletedListener arg0) { }
        @Override public void setEnableSessionCreation(boolean arg0) { }
        @Override public void setEnabledCipherSuites(String[] arg0) { }
        @Override public void setEnabledProtocols(String[] arg0) { }
        @Override public void setNeedClientAuth(boolean arg0) { }
        @Override public void setUseClientMode(boolean arg0) { }
        @Override public void setWantClientAuth(boolean arg0) { }
        @Override public String[] getSupportedCipherSuites() { return null; }

            @Override
            public void startHandshake() throws IOException {
                tlsClientProtocol.connect(new DefaultTlsClient() {

                    @SuppressWarnings("unchecked")
                    @Override
                    public Hashtable<Integer, byte[]> getClientExtensions() throws IOException {
                        Hashtable<Integer, byte[]> clientExtensions = super.getClientExtensions();
                        if (clientExtensions == null) {
                            clientExtensions = new Hashtable<Integer, byte[]>();
                        }

                        //Add host_name
                        byte[] host_name = host.getBytes();

                        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
                        final DataOutputStream dos = new DataOutputStream(baos);
                        dos.writeShort(host_name.length + 3);
                        dos.writeByte(0);
                        dos.writeShort(host_name.length);
                        dos.write(host_name);
                        dos.close();
                        clientExtensions.put(ExtensionType.server_name, baos.toByteArray());
                        return clientExtensions;
                    }

                    @Override
                    public TlsAuthentication getAuthentication() throws IOException {
                        return new TlsAuthentication() {

                            @Override
                            public void notifyServerCertificate(Certificate serverCertificate) throws IOException {
                                try {
                                    KeyStore ks = _loadKeyStore();

                                    CertificateFactory cf = CertificateFactory.getInstance("X.509");
                                    List<java.security.cert.Certificate> certs = new LinkedList<java.security.cert.Certificate>();
                                    boolean trustedCertificate = false;
                                    for ( org.bouncycastle.asn1.x509.Certificate c : serverCertificate.getCertificateList()) {
                                        java.security.cert.Certificate cert = cf.generateCertificate(new ByteArrayInputStream(c.getEncoded()));
                                        certs.add(cert);

                                        String alias = ks.getCertificateAlias(cert);
                                        if(alias != null) {
                                            if (cert instanceof java.security.cert.X509Certificate) {
                                                try {
                                                    ( (java.security.cert.X509Certificate) cert).checkValidity();
                                                    trustedCertificate = true;
                                                } catch(CertificateExpiredException cee) {
                                                   // Accept all the certs!
                                                }
                                            }
                                        } else {
                                            // Accept all the certs!
                                        }

                                    }
                                    if (!trustedCertificate) {
                                        // Accept all the certs!
                                    }
                                    peertCerts = certs.toArray(new java.security.cert.Certificate[0]);
                                } catch (Exception ex) {
                                    ex.printStackTrace();
                                    throw new IOException(ex);
                                }
                            }

                            @Override
                            public TlsCredentials getClientCredentials(CertificateRequest certificateRequest) throws IOException {
                                return null;
                            }

                            private KeyStore _loadKeyStore() throws Exception {
                                FileInputStream trustStoreFis = null;
                                try {
                                    KeyStore localKeyStore = null;

                                    String trustStoreType = System.getProperty("javax.net.ssl.trustStoreType")!=null?System.getProperty("javax.net.ssl.trustStoreType"):KeyStore.getDefaultType();
                                    String trustStoreProvider = System.getProperty("javax.net.ssl.trustStoreProvider")!=null?System.getProperty("javax.net.ssl.trustStoreProvider"):"";

                                    if (trustStoreType.length() != 0) {
                                        if (trustStoreProvider.length() == 0) {
                                            localKeyStore = KeyStore.getInstance(trustStoreType);
                                        } else {
                                            localKeyStore = KeyStore.getInstance(trustStoreType, trustStoreProvider);
                                        }

                                        char[] keyStorePass = null;
                                        String str5 = System.getProperty("javax.net.ssl.trustStorePassword")!=null?System.getProperty("javax.net.ssl.trustStorePassword"):"";

                                        if (str5.length() != 0) {
                                            keyStorePass = str5.toCharArray();
                                        }

                                        localKeyStore.load(trustStoreFis, keyStorePass);

                                        if (keyStorePass != null) {
                                            for (int i = 0; i < keyStorePass.length; i++) {
                                                keyStorePass[i] = 0;
                                            }
                                        }
                                    }
                                    return localKeyStore;
                                } finally {
                                    if (trustStoreFis != null) {
                                        trustStoreFis.close();
                                    }
                                }
                            }
                        };
                    }

                });
            } // startHandshake
        };
    }
}

接下来，您需要使用新的套接字工厂。如果您使用Spring处理Web服务调用，则可以扩展现有的HttpUrlConnectionMessageSender以便为您发送呼叫。只需确保在spring配置中更新您的消息发送方bean以使用此类。

import java.io.IOException;
import java.net.*;

import javax.net.ssl.HttpsURLConnection;

import org.springframework.ws.transport.WebServiceConnection;
import org.springframework.ws.transport.http.*;


public class HttpsUrlConnectionMessageSender extends HttpUrlConnectionMessageSender {

    @Override
    public WebServiceConnection createConnection(URI uri) throws IOException {

        URL url = uri.toURL();
        URLConnection connection = url.openConnection();
        if (!(connection instanceof HttpsURLConnection)) {
            throw new HttpTransportException("URI [" + uri + "] is not an HTTPS URL");
        } else {
            HttpsURLConnection httpsURLConnection = (HttpsURLConnection) connection;
            httpsURLConnection.setSSLSocketFactory(new TLSSocketConnectionFactory());
            prepareConnection(httpsURLConnection);
            return new HttpsUrlConnection(httpsURLConnection);
        }
    }

    private static class HttpsUrlConnection extends HttpUrlConnection {
        private HttpsUrlConnection(HttpsURLConnection connection) {
            super(connection);
        }
    }
}

或者，如果您不使用Spring或使用Rest，您可以像上面的类一样手动创建HttpsURLConnection，并使用输出流发送消息。

请注意，如果您与之通信的服务使用Cookie，则需要设置系统范围的Cookie管理器。但是，Java 6 cookie管理器是错误的。您可能需要从Java 8 CookieManager复制源代码才能使cookie正常工作。

if (CookieHandler.getDefault() == null) {
    CookieHandler.setDefault(new CookieManager());
}

Answer 2

你将面对Bouncy Castle的主要问题是它的TLS实现没有实现JSSE API。实际上，这意味着您不会获得SSLSocket，SSLSocketFactory（或HttpsURLConnection的任何支持，但是当您使用Apache HTTP客户端时无关紧要。）

此外，TLS并不是Bouncy Castle最好的记录功能，它将使您的工作更加困难。 this other question的答案中有一些例子。

您可能以某种方式能够编写自定义Socket实现，该实现包含对Bouncy Castle的TLS API的必要调用。然后，您可以从自定义org.apache.http.conn.ssl.SSLConnectionSocketFactory实现中返回此类套接字（如果您的子类为其返回Socket的方法执行完全不同的操作，则可能在构造函数中使用虚拟值。）

这可能是可行的，但可能需要付出相当大的努力。升级到Java 8（支持使用传统JSSE类的TLS 1.2）通常会更容易（取决于您的约束）。