使jets3t支持https

今天调试了rt的问题，由于比较粗心导致了下班才调好，哎，可不能这样了！

具体做法是：

eucalyptu访问walrus时默认是http协议，端口号为8773。

而jets3t的配置脚本中http占用了8773，https占用了8443，所以利用java程序导入8443端口号对应的证书时是错误的，因为端口号与桉树访问walrus时不一致，所以当然访问不了了。

所以把jets3t的http的8773注释掉，将https的端口号改为8773，注意，ip要对应，就是这里浪费了很多时间！

重启，OK！

java程序方法如下：

当java客户端请求实现https协议的服务时，出现异常：'unable to find valid certification path to requested target'

是因为服务期端的证书没有被认证，需要做的是把服务端证书导入到java keystore。可以用附件中的java类实现。

使用方法：

＃java InstallCert web_site_hostname：port

这个java类会打开一个连接到你指定的host，开始握手过程。如果出现异常会打印到控制台并且会显示服务端所使用的证书，此时它会问你是否要把证书加入到你的keystore。如果你不想加，输入"q",否则输入"1".

当你输入"1"后，InstallCert.java会显示证书的有关信息，然后把证书导入到一个名为"jssecacerts"的keystore中(当前目录），只需要把这个文件拷贝到$JAVA_HOME/jre/lib/security目录中，重命名为"cacerts".

程序如下：

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);
}
    }
}
 
另一种方法如下：
＃keytool -import -keystore $JAVA_HOME/jre/lib/security/cacerts  -file server.crt -alias myservercrt
刚才试验了这种方法，结果是可行的，就是导入clc对应的证书文件即可。keytool的默认密码为changeit。
KO！