记一次因证书问题致使请求失败问题SSLHandshakeException

记一次因证书问题致使请求失败问题SSLHandshakeException

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最近接一外部接口，接口在本地开发调试及测试都无任何问题(windows下)，而上测试环境后测第一次就直接报错误，
错误是这样子的：

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
        at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1917)
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:301)
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:295)
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1369)
        at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:156)
        at sun.security.ssl.Handshaker.processLoop(Handshaker.java:925)
        at sun.security.ssl.Handshaker.process_record(Handshaker.java:860)
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1043)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1343)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1371)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1355)

enn~,首先那个接口地址是https的，服务器是linux的；以上错误其大意是没法找到及验证有效证书，再想一想：不对啊，本地jdk和服务器的jdk都是oracle官方jdk 1.8呀，照理说
本地调试没问题在服务端应该也不会有什么问题呢～

诶～，无论怎么分析都仍是要解决问题呀，首先我分析到这又两个问题点：

• 本地和服务器OS不一致
• 接口地址的SSL证书存在不兼容或其余问题

怎么办？要求对方检查证书配置，可能性不大，剩下的就只剩下一种方式：作兼容，就是在请求的时候信任对方的证书。

因而有了初版。

由于我使用的是CloseableHttpClient，作的请求管理，不如在让CloseableHttpClient兼容https与http不就行了，寻思一项，搜索一番代码即成
(这里只给出核心代码)

// 以前
    // private static CloseableHttpClient httpClient = HttpClients.custom().build();

    // 以后
    private static CloseableHttpClient httpClient;
    static {
        try {
            System.out.println("===>01");
            // 忽略证书
            SSLContextBuilder SslBuilder = new SSLContextBuilder().loadTrustMaterial(null, new TrustSelfSignedStrategy());
            //不进行主机名验证
            SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(SslBuilder.build(), NoopHostnameVerifier.INSTANCE);
            Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
                    .register("http", new PlainConnectionSocketFactory())
                    .register("https", sslConnectionSocketFactory)
                    .build();
            PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(registry);
            cm.setMaxTotal(100);
            httpClient = HttpClients.custom()
                    .setSSLSocketFactory(sslConnectionSocketFactory)
                    .setDefaultCookieStore(new BasicCookieStore())
                    .setConnectionManager(cm).build();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("===>02");
            httpClient = HttpClients.custom().build();
        }
    }

bingo ～，上线测 。。。

oh～，no，依然是这个错：

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
        ......

待我分析一番，发现上面的代码仅仅只是为了避免验证对方主机，彻底没有理会证书的错误。。。欸～，这是个问题。

后我又想起以前上上家公司也有出现过这个问题，哈～，有办法了，找到源码把主要的几句copy过来走走不就行了。

因而，第二版

核心代码：

HostnameVerifier hv = new HostnameVerifier() {
        public boolean verify(String urlHostName, SSLSession session) {
            return true;
        }
    };

 private static void trustAllHttpsCertificates() throws Exception {
     javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];
     javax.net.ssl.TrustManager tm = new miTM();
     trustAllCerts[0] = tm;
     javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext
     .getInstance("SSL");
     sc.init(null, trustAllCerts, null);
     javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc
     .getSocketFactory());
 }

 static class miTM implements javax.net.ssl.TrustManager,
 javax.net.ssl.X509TrustManager {
     public java.security.cert.X509Certificate[] getAcceptedIssuers() {
     return null;
 }

 public boolean isServerTrusted(
     java.security.cert.X509Certificate[] certs) {
     return true;
 }

 public boolean isClientTrusted(
     java.security.cert.X509Certificate[] certs) {
     return true;
 }

 public void checkServerTrusted(
     java.security.cert.X509Certificate[] certs, String authType)
     throws java.security.cert.CertificateException {
     return;
 }

 public void checkClientTrusted(
     java.security.cert.X509Certificate[] certs, String authType)
     throws java.security.cert.CertificateException {
        return;
     }
 }

 // 在访问前调用
 trustAllHttpsCertificates();
 HttpsURLConnection.setDefaultHostnameVerifier(hv);

一整折腾后上线部署测试，啊～，仍是一样的错误。。。

分析代码，看到，这种处理逻辑只针对自定义SSL证书有效，对于我现有的状况丁点问题都解决不了

终版

其实业务代码的什么都没改，只是给jdk添加了点儿东西。
主要解决思路是让jdk忽略指定域名的SSL证书。

//InstallCert.java


import java.io.*;
import java.net.URL;

import java.security.*;
import java.security.cert.*;

import javax.net.ssl.*;

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);
    }
    }
}

具体解决步骤：

• 编译文件
  • javac InstallCert.java
• 添加信任
  • java InstallCert 域名地址
• 上传证书(需手动将网站证书导出)
  • rz => 证书.cer
• 导入证书(密码：changeit)
  • echo $JAVA_HOME
  • keytool -import -alias LL1 -keystore $JAVA_HOME/jre/lib/security/cacerts -file /home/证书.cer