https的传输方式

一：文章1

package yonyou;

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);
}
}

}

二：文章2：

package yonyou;


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;


import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;


public class TestHttps {
// 默认的HTTPS 端口
static final int HTTPS_PORT = 443;
// https://baike.baidu.com/item/Redis/6549233?fr=aladdin
public static void main(String[] args) {
String host = "baike.baidu.com";
// 受访的页面
String url = "/item/Redis/6549233?fr=aladdin";
// 自定义的管理器
X509TrustManager xtm = new Java2000TrustManager();
TrustManager mytm[] = { xtm };
// 得到上下文
SSLContext ctx = null;
try {
ctx = SSLContext.getInstance("SSL");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
// 初始化
try {
ctx.init(null, mytm, null);
} catch (KeyManagementException e) {
e.printStackTrace();
}
// 获得工厂
SSLSocketFactory factory = ctx.getSocketFactory();


// 从工厂获得Socket连接
Socket socket = null;
try {
socket = factory.createSocket(host, HTTPS_PORT);
// 剩下的就和普通的Socket操作一样了
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out.write("GET " + url + " HTTP/1.0\n\n");
out.flush();
System.out.println("start   work!");
String line;
StringBuffer sb = new StringBuffer();
while ((line = in.readLine()) != null) {
sb.append(line + "\n");
}
out.close();
in.close();
System.out.println(sb.toString());


} catch (Exception e) {
e.printStackTrace();
}
}


}


class Java2000TrustManager implements X509TrustManager {

@Override
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
System.out.println("检查客户端的可信任状态...");
}

@Override
public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
System.out.println("检查服务器的可信任状态");
}

@Override
public X509Certificate[] getAcceptedIssuers() {
System.out.println("获取接受的发行商数组...");
return null;
}

}