获取并安装SSL证书

Question

因此，我还看到了下面的java代码，以检索并导入服务器发布的证书，并将它们导入信任库。

import javax.net.ssl.*;
import java.io.*;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

/**
 * Class used to add the server's certificate to the KeyStore
 * with your trusted certificates.
 */
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 [: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);
        }
    }
}

在第一次运行期间，我获得了由服务器发布的两个证书，并将它们导入到我的信任库中，没有问题(我可以通过keytool在信任库中看到证书)。然而，在第二次运行时，我希望得到“没有错误，证书已经被信任”的输出，但是我得到了如下所示的UnsupportedOperationException，从内部类的getAcceptedIssuers()方法传播，然后再次提示导入证书。谁能帮我理解一下原因吗？

Starting SSL handshake...

javax.net.ssl.SSLException: java.lang.UnsupportedOperationException
        at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
        at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1904)
        at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1862)
        at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1845)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1366)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1343)
        at LDAPCerts.start(LDAPCerts.java:41)
        at LDAPCerts.main(LDAPCerts.java:15)
Caused by: java.lang.UnsupportedOperationException
        at LDAPCerts$SavingTrustManager.getAcceptedIssuers(LDAPCerts.java:126)
        at sun.security.ssl.AbstractTrustManagerWrapper.checkAlgorithmConstraints(SSLContextImpl.java:998)
        at sun.security.ssl.AbstractTrustManagerWrapper.checkAdditionalTrust(SSLContextImpl.java:944)
        at sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(SSLContextImpl.java:886)
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1428)
        at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:209)
        at sun.security.ssl.Handshaker.processLoop(Handshaker.java:901)
        at sun.security.ssl.Handshaker.process_record(Handshaker.java:837)
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1023)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1332)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1359)
        ... 3 more

Answer 1

这很简单，在您的X509TrustManager实现上

您只需返回一个X509Certificate数组即可。仅此而已！

    @Override
    public X509Certificate[] getAcceptedIssuers() {
        return new X509Certificate[0];
        // throw new UnsupportedOperationException();
    }

从..。http://infposs.blogspot.com/2013/06/installcert-and-java-7.html

Answer 2

创建jssecacerts文件后，将其复制到$JAVA_HOME/jre/lib/security/目录中，然后再试一次。

更新：

好吧，没有必要，但是您需要通过JVM系统参数指定位置：

-Djavax.net.ssl.trustStore=

请看位置是如何确定的。摘自甲骨文指南：

1. 如果系统属性: javax.net.ssl.trustStore

定义后，TrustManagerFactory将尝试使用该系统属性指定的文件名查找文件，并将该文件用于KeyStore。如果还定义了javax.net.ssl.trustStorePassword系统属性，则其值用于在打开信任库之前检查数据的完整性。

如果定义了javax.net.ssl.trustStore，但指定的文件不存在，则将创建使用空密钥存储库的默认TrustManager。

1. 如果未指定javax.net.ssl.trustStore系统属性，则如果文件/lib/security/jssecacerts

存在时，将使用该文件。(有关引用的信息，请参阅安装目录。)否则，

1. 如果文件/lib/security/security

存在时，将使用该文件。