Jenkins(2020年及以后版本，2.260以上)安裝后，插件下載時(shí)失敗，摸索到了以下Jenkins安裝插件失敗的另一種解決方法俄认。
（Update Site的默認(rèn)URL不需要?jiǎng)樱?/p>
1|11.報(bào)錯(cuò)的首行提示：sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
報(bào)錯(cuò)原因：訪問https的插件地址因?yàn)榘踩C書問題而報(bào)錯(cuò)。
1|22.解決方案：
echo -e "
/*
* Copyright 2006 Sun Microsystems, Inc.? All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*? - Redistributions of source code must retain the above copyright
*? ? notice, this list of conditions and the following disclaimer.
*
*? - Redistributions in binary form must reproduce the above copyright
*? ? notice, this list of conditions and the following disclaimer in the
*? ? documentation and/or other materials provided with the distribution.
*
*? - Neither the name of Sun Microsystems nor the names of its
*? ? contributors may be used to endorse or promote products derived
*? ? from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.? IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
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);
? ? ? ? }
? ? }
}
" >> InstallCert.java
javac InstallCert.java
scp -rf *.class /usr/local/jdk1.8.0_91/jre/lib
java InstallCert mirrors.tuna.tsinghua.edu.cn
#出現(xiàn)提示后按1洪乍，回車眯杏，會(huì)生成jssecacerts 文件
cp jssecacerts /usr/local/jdk1.8.0_91/jre/lib/security/
service jenkins restart
