業務需求又發生的改變，登錄模塊中要用郵箱去驗證，於是試試企業郵件服務器發郵件，結果使用SSL遇到
PKIX：nable to find valid certification path to requested target
通過搜索和查詢資料發現CSDN上一篇文章給出了一個關鍵性的步驟-獲取安全證書。
原文地址：
http://blog.csdn.net/faye0412/article/details/6883879
獲取安全證書的代碼收藏下來：
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() {
return new X509Certificate[0];
// 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);
}
}
}
生成證書的方法：
1.編譯InstallCert.java
2.執行java InstallCert host password
例如：java InstalCert smtp.zhangsan.com:465 admin
如果不加參數password和host的端口號，上面的獲取證書程序中默認給的端口號是：443，密碼是:changeit
3.根據運行提示信息，輸入1，回車，在當前目錄下生成名爲： jssecacerts 的證書
4.重要：
將證書放置到$JAVA_HOME/jre/lib/security目錄下， 切記該JDK的jre是工程所用的環境！！！
5、以後更新時，先刪除原來的證書，然後倒入新證書
keytool -list -keystore cacerts -- 查看證書列表
keytool -delete -alias akazam_email -keystore cacerts
keytool -import -alias akazam_email -file akazam_email.cer -keystore cacerts -trustcacerts
6、今天無意中看到了javaMail有這樣的協議支持描述：
- Protocol Store or Uses Supports
- Name Transport? SSL? STARTTLS?
- -------------------------------------------------
- imap Store No Yes
- imaps Store Yes N/A
- pop3 Store No Yes
- pop3s Store Yes N/A
- smtp Transport No Yes
- smtps Transport Yes N/A
- public class JavaMailTest1 {
- public static void main(String[] args) throws MessagingException {
- Properties props = new Properties();
- props.setProperty("mail.debug", "true");
- props.setProperty("mail.smtp.auth", "true");
- // props.setProperty("mail.transport.protocol", "smtps"); 加這句
- // SSL
- props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
- props.setProperty("mail.smtp.socketFactory.fallback", "false");
- props.setProperty("mail.smtp.port", "465");
- props.setProperty("mail.smtp.socketFactory.port", "465");
- props.setProperty("mail.smtp.ssl.enable", "true"); //或者加這句 都能用ssl發
- Session session = Session.getInstance(props);
- Message msg = new MimeMessage(session);
- msg.setText("你好嗎？");
- msg.setFrom(new InternetAddress("發件箱地址"));
- Transport transport = session.getTransport();
- transport.connect("smtp.sina.com", "用戶名", "密碼");
- transport.sendMessage(msg, new Address[] {new InternetAddress("收件箱地址")});
- transport.close();
- }
- }
這樣，JavaMail會自動使用SSL，並且使用465端口。
類似問題還可以參考：http://blog.csdn.net/pingyan158/article/details/60961515