所有工具类
为了尽可能避免安全问题，公司的很多系统服务都逐步https化，虽然开始过程会遇到各种问题，但趋势不改。最完美的https应用是能实现双向认证，客户端用私钥签名用服务端公钥加密，服务端用私钥签名客户端都公钥加密，但现实很多情况不可能让每个客户端都申请一个证书，因此只实现https的单项认证，即只要服务端又证书，客户端只验证https端证书可靠就可进行https通信。在某些情况下为了不花钱买第三方信任机构颁发都证书，客户端在一些情况下也不做服务器端都认证，两边只实现htts的加密通信。最近就遇到一个问题，https调用证书验证失败，最终考虑还是忽略调服务证书的验证。
package zj.cert.util;
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;
/**
* 概况 ：jdk的https证书生成<br>
* 生成的jssecacerts文件放入到当前jdk下的jre\lib\security这个目录下
*
* @version 1.00 （2011.12.02）
* @author SHNKCS 张军 {@link <a target=_blank href="http://www.zhangjunbk.com">张军个人网站</a> <a target=_blank href="http://user.qzone.qq.com/360901061/">张军QQ空间</a>} <br>
*/
public class InstallCertUtil {
/**
* 创建证书
*
* @param host
* 服务器IP地址
* @param port
* 服务器端口号
* @throws Exception
*/
public static void createCert(String host, int port) throws Exception {
char SEP = File.separatorChar;
createCert(host, port, System.getProperty("java.home") + SEP + "lib" + SEP + "security", "jssecacerts");
}
/**
* 创建证书
*
* @param host
* 服务器IP地址
* @param port
* 服务器端口号
* @param certDir
* 证书目录jre\lib\security
* @param certFile
* 证书文件
* @throws Exception
*/
public static void createCert(String host, int port, String certDir, String certFile) throws Exception {
char[] passphrase = "changeit".toCharArray();
File dir = new File(certDir);
if (!dir.exists()) {
dir.mkdirs();
}
File file = new File(dir, certFile);
if (!file.isFile()) {
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();
/**
*
* @param bytes
* @return
*/
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();
}
/**
* 保存认证管理
*
* @author zhangjun
*
*/
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);
}
}
}
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