javaMail MessagingException CertPathValidatorException

 W/System.err(2347): javax.mail.MessagingException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.; W/System.err(2347):   nested exception is: W/System.err(2347): javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found. W/System.err(2347): at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:571) W/System.err(2347): at javax.mail.Service.connect(Service.java:288) W/System.err(2347): at javax.mail.Service.connect(Service.java:169) W/System.err(2347): at com.jiangmen.zdaiapp.zconn.ConnectUtils.login(ConnectUtils.java:56) W/System.err(2347): at com.jiangmen.zdaiapp.login.SpActivity$4.run(SpActivity.java:165) W/System.err(2347): at java.lang.Thread.run(Thread.java:841) W/System.err(2347): Caused by: javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found. W/System.err(2347): at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:410) W/System.err(2347): at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.<init>(OpenSSLSocketImpl.java:661) W/System.err(2347): at com.android.org.conscrypt.OpenSSLSocketImpl.getInputStream(OpenSSLSocketImpl.java:632) W/System.err(2347): at com.sun.mail.iap.Protocol.initStreams(Protocol.java:132) W/System.err(2347): at com.sun.mail.iap.Protocol.<init>(Protocol.java:111) W/System.err(2347): at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:104) W/System.err(2347): at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:538) W/System.err(2347): ... 5 more W/System.err(2347): Caused by: java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found. W/System.err(2347): at com.android.org.conscrypt.TrustManagerImpl.checkTrusted(TrustManagerImpl.java:288) W/System.err(2347): at com.android.org.conscrypt.TrustManagerImpl.checkServerTrusted(TrustManagerImpl.java:208) W/System.err(2347): at com.android.org.conscrypt.OpenSSLSocketImpl.verifyCertificateChain(OpenSSLSocketImpl.java:611) W/System.err(2347): at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method) W/System.err(2347): at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:406) W/System.err(2347): ... 11 more W/System.err(2347): Caused by: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found. W/System.err(2347): ... 16 more

方案一：忽略证书验证：（我使用的是这个，store.connect连接成功）

String SSL_SOCKET_FACTORY_OVERRIADE="com.jiangmen.zdaiapp.login.ssl.DummySSLSocketFactory";String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";Security.setProperty("ssl.SocketFactory.provider", SSL_SOCKET_FACTORY_OVERRIADE);Properties imapSSLProp = System.getProperties();imapSSLProp.setProperty("mail.imap.socketFactory.port", port);imapSSLProp.setProperty("mail.imap.port", port);imapSSLProp.setProperty("mail.imap.host", host);imapSSLProp.setProperty("mail.store.protocol", protocol);//2017-12-15-start-certificate check---STARTimapSSLProp.setProperty("mail.imap.starttls.enable", "false");//Disable TLSimapSSLProp.setProperty("mail.imaps.class", "com.sun.mail.imap.IMAPSSLStore");imapSSLProp.setProperty("mail.debug", "true");  imapSSLProp.setProperty("mail.imap.socketFactory.fallback ", "false");// Use SSLimapSSLProp.setProperty("mail.imap.ssl.checkserveridentity", "false");imapSSLProp.setProperty("mail.imap.ssl.trust", "*");imapSSLProp.setProperty("mail.imap.socketFactory.class", SSL_SOCKET_FACTORY_OVERRIADE);////2017-12-15-start-certificate check-----ENDSession session=Session.getDefaultInstance(imapSSLProp);session.setDebug(false);Store store = session.getStore(protocol);// setSslSocketFactorystore.connect(host, user, password);

使用的代码：

1.DummySSLSocketFactory 

import java.io.IOException;import java.net.InetAddress;import java.net.Socket;import javax.net.SocketFactory;import javax.net.ssl.SSLContext;import javax.net.ssl.SSLSocketFactory;import javax.net.ssl.TrustManager;public class DummySSLSocketFactory extends SSLSocketFactory {  private SSLSocketFactory factory;  public DummySSLSocketFactory() {    try {      SSLContext sslcontext = SSLContext.getInstance( "TLS");      sslcontext.init( null, // No KeyManager required          new TrustManager[] { (TrustManager) new DummyTrustManager()},          new java.security.SecureRandom());      factory = ( SSLSocketFactory) sslcontext.getSocketFactory();    } catch( Exception ex) {      ex.printStackTrace();    }  }  public static SocketFactory getDefault() {    return new DummySSLSocketFactory();  }  public Socket createSocket() throws IOException {      return factory.createSocket();      }   public Socket createSocket( Socket socket, String s, int i, boolean flag)      throws IOException {    return factory.createSocket( socket, s, i, flag);  }  public Socket createSocket( InetAddress inaddr, int i,      InetAddress inaddr1, int j) throws IOException {    return factory.createSocket( inaddr, i, inaddr1, j);  }  public Socket createSocket( InetAddress inaddr, int i) throws IOException {    return factory.createSocket( inaddr, i);  }  public Socket createSocket( String s, int i, InetAddress inaddr, int j)      throws IOException {    return factory.createSocket( s, i, inaddr, j);  }  public Socket createSocket( String s, int i) throws IOException {    return factory.createSocket( s, i);  }  public String[] getDefaultCipherSuites() {    return factory.getSupportedCipherSuites();  }  public String[] getSupportedCipherSuites() {    return factory.getSupportedCipherSuites();  }}

2.DummyTrustManager 

import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import javax.net.ssl.X509TrustManager;//import com.sun.net.ssl.X509TrustManager;public class DummyTrustManager implements X509TrustManager{    public boolean isClientTrusted( X509Certificate[] cert) {          return true;        }        public boolean isServerTrusted( X509Certificate[] cert) {          return true;        }        public X509Certificate[] getAcceptedIssuers() {          return new X509Certificate[ 0];        }@Overridepublic void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {// TODO Auto-generated method stub}@Overridepublic void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {// TODO Auto-generated method stub}}

方案二：使用证书(首先我没验证成功)，大概生成证书步骤如下：

smtp和imap 都一样，将imap替换成smtp就可以了

1、下载InstallCert.java 文件（后面会粘贴）

2、打开cmd命令，进入InstallCert.java所在目录；

3、输入命令：javac InstallCert.java 将java文件编译成class；
4、输入命令：java InstallCert imap.ctsat.com:993 进行加载：imap 下的  ctsat邮箱后缀，端口号993 进行编译

5、编译后询问"Enter certificate to add to trusted keystore or 'q' to quit: [1]"    现在直接按回车即可，

6、最后生成文件jssecacerts (  Added certificate to keystore 'jssecacerts' using alias 'imap.ctsat.com-1')

7、得到jssecacerts文件后复制到jdk1.6.0_14\jre\lib\security目录 就可以了；

(或者使用imapSSLProp.setProperty("javax.net.ssl.trustStore","file:///android_asset/jssecacerts"); //我使用的是这个 但是没有成功)

cmd命令如下：

1.

2.........

3........

  代码附录

1.InstallCert.java

/* * 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.*;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);}    }}