• Tomcat应用访问SSL或https失败的解决办法


    一,首先,解决unable to find valid certification path to requested target的问题。

    其实就是要生成证书, 让tomcat读取证书

    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.io.OutputStream;
    import java.security.KeyStore;
    import java.security.MessageDigest;
    import java.security.cert.CertificateException;
    import java.security.cert.X509Certificate;
     
    import javax.net.ssl.SSLContext;
    import javax.net.ssl.SSLException;
    import javax.net.ssl.SSLSocket;
    import javax.net.ssl.SSLSocketFactory;
    import javax.net.ssl.TrustManager;
    import javax.net.ssl.TrustManagerFactory;
    import javax.net.ssl.X509TrustManager;
     
    public class InstallCert {
     
        public static void main(String[] args) throws Exception {
            String host;
            int port;
            char[] passphrase;
            if ((args.length == 1) || (args.length == 2)) {
                String[] c = args[0].split(":");
                host = c[0];
                port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
                String p = (args.length == 1) ? "changeit" : args[1];
                passphrase = p.toCharArray();
            } else {
                System.out
                        .println("Usage: java InstallCert <host>[:port] [passphrase]");
                return;
            }
     
            File file = new File("jssecacerts");
            if (file.isFile() == false) {
                char SEP = File.separatorChar;
                File dir = new File(System.getProperty("java.home") + SEP + "lib"
                        + SEP + "security");
                file = new File(dir, "jssecacerts");
                if (file.isFile() == false) {
                    file = new File(dir, "cacerts");
                }
            }
            System.out.println("Loading KeyStore " + file + "...");
            InputStream in = new FileInputStream(file);
            KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
            ks.load(in, passphrase);
            in.close();
     
            SSLContext context = SSLContext.getInstance("TLS");
            TrustManagerFactory tmf = TrustManagerFactory
                    .getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(ks);
            X509TrustManager defaultTrustManager = (X509TrustManager) tmf
                    .getTrustManagers()[0];
            SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
            context.init(null, new TrustManager[] { tm }, null);
            SSLSocketFactory factory = context.getSocketFactory();
     
            System.out
                    .println("Opening connection to " + host + ":" + port + "...");
            SSLSocket socket = (SSLSocket) factory.createSocket(host, port);
            socket.setSoTimeout(10000);
            try {
                System.out.println("Starting SSL handshake...");
                socket.startHandshake();
                socket.close();
                System.out.println();
                System.out.println("No errors, certificate is already trusted");
            } catch (SSLException e) {
                System.out.println();
                e.printStackTrace(System.out);
            }
     
            X509Certificate[] chain = tm.chain;
            if (chain == null) {
                System.out.println("Could not obtain server certificate chain");
                return;
            }
     
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    System.in));
     
            System.out.println();
            System.out.println("Server sent " + chain.length + " certificate(s):");
            System.out.println();
            MessageDigest sha1 = MessageDigest.getInstance("SHA1");
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            for (int i = 0; i < chain.length; i++) {
                X509Certificate cert = chain[i];
                System.out.println(" " + (i + 1) + " Subject "
                        + cert.getSubjectDN());
                System.out.println("   Issuer  " + cert.getIssuerDN());
                sha1.update(cert.getEncoded());
                System.out.println("   sha1    " + toHexString(sha1.digest()));
                md5.update(cert.getEncoded());
                System.out.println("   md5     " + toHexString(md5.digest()));
                System.out.println();
            }
     
            System.out
                    .println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
            String line = reader.readLine().trim();
            int k;
            try {
                k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
            } catch (NumberFormatException e) {
                System.out.println("KeyStore not changed");
                return;
            }
     
            X509Certificate cert = chain[k];
            String alias = host + "-" + (k + 1);
            ks.setCertificateEntry(alias, cert);
     
            OutputStream out = new FileOutputStream("jssecacerts");
            ks.store(out, passphrase);
            out.close();
     
            System.out.println();
            System.out.println(cert);
            System.out.println();
            System.out
                    .println("Added certificate to keystore 'jssecacerts' using alias '"
                            + alias + "'");
        }
     
        private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
     
        private static String toHexString(byte[] bytes) {
            StringBuilder sb = new StringBuilder(bytes.length * 3);
            for (int b : bytes) {
                b &= 0xff;
                sb.append(HEXDIGITS[b >> 4]);
                sb.append(HEXDIGITS[b & 15]);
                sb.append(' ');
            }
            return sb.toString();
        }
     
        private static class SavingTrustManager implements X509TrustManager {
     
            private final X509TrustManager tm;
            private X509Certificate[] chain;
     
            SavingTrustManager(X509TrustManager tm) {
                this.tm = tm;
            }
     
            public X509Certificate[] getAcceptedIssuers() {
                throw new UnsupportedOperationException();
            }
     
            public void checkClientTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
                throw new UnsupportedOperationException();
            }
     
            public void checkServerTrusted(X509Certificate[] chain, String authType)
                    throws CertificateException {
                this.chain = chain;
                tm.checkServerTrusted(chain, authType);
            }
        }
     
    }  
    

      在把证书放到$JAVA_HOME/jre/lib/security目录下

    要么就是在浏览器里面打开网站的证书, 导出来上传到服务器上, 然后导入到tomcat默认的cacerts

    二,然后, 如果问题未解决出现“Certificate doesn't match any of the subject alternative names”

    这时候, 需要改造代码

    a. 方案1:使用HttpURLConnection 请求https地址, 例子如下:

    import java.net.HttpURLConnection;
    
    public static HttpURLConnection connectToWeb(String uri) {
        HttpURLConnection connection = null;
        try {
            URL url = new URL(uri);
            connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
        } catch (MalformedURLException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return connection;
    }
    

    b.方案2:使用SSLConnectionSocketFactory,例子如下:

    public static CloseableHttpClient createSSLClientDefault() {
            CloseableHttpClient client = null;
            try {
                SSLContext sslContext = null;
                sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
                    @Override
                    public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        return true;
                    }
                }).build();
                SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);//这里的红色部分
                client = HttpClients.custom().setSSLSocketFactory(sslsf).build();
            } catch (NoSuchAlgorithmException | KeyStoreException | KeyManagementException e) {
                e.printStackTrace();
            }
            return client;
        }
    

      

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  • 原文地址:https://www.cnblogs.com/plain-heart/p/11381261.html
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