Java example source code file (Klist.java)
The Klist.java Java example source code/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* (C) Copyright IBM Corp. 1999 All Rights Reserved.
* Copyright 1997 The Open Group Research Institute. All rights reserved.
*/
package sun.security.krb5.internal.tools;
import java.net.InetAddress;
import sun.security.krb5.*;
import sun.security.krb5.internal.*;
import sun.security.krb5.internal.ccache.*;
import sun.security.krb5.internal.ktab.*;
import sun.security.krb5.internal.crypto.EType;
/**
* This class can execute as a command-line tool to list entries in
* credential cache and key tab.
*
* @author Yanni Zhang
* @author Ram Marti
*/
public class Klist {
Object target;
// for credentials cache, options are 'f', 'e', 'a' and 'n';
// for keytab, optionsare 't' and 'K' and 'e'
char[] options = new char[4];
String name; // the name of credentials cache and keytable.
char action; // actions would be 'c' for credentials cache
// and 'k' for keytable.
private static boolean DEBUG = Krb5.DEBUG;
/**
* The main program that can be invoked at command line.
* <br>Usage: klist
* [[-c] [-f] [-e] [-a [-n]]] [-k [-t] [-K]] [name]
* -c specifies that credential cache is to be listed
* -k specifies that key tab is to be listed
* name name of the credentials cache or keytab
* <br>available options for credential caches:
* <ul>
* <li>-f shows credentials flags
* <li>-e shows the encryption type
* <li>-a shows addresses
* <li>-n do not reverse-resolve addresses
* </ul>
* available options for keytabs:
* <li>-t shows keytab entry timestamps
* <li>-K shows keytab entry DES keys
*/
public static void main(String[] args) {
Klist klist = new Klist();
if ((args == null) || (args.length == 0)) {
klist.action = 'c'; // default will list default credentials cache.
} else {
klist.processArgs(args);
}
switch (klist.action) {
case 'c':
if (klist.name == null) {
klist.target = CredentialsCache.getInstance();
klist.name = CredentialsCache.cacheName();
} else
klist.target = CredentialsCache.getInstance(klist.name);
if (klist.target != null) {
klist.displayCache();
} else {
klist.displayMessage("Credentials cache");
System.exit(-1);
}
break;
case 'k':
KeyTab ktab = KeyTab.getInstance(klist.name);
if (ktab.isMissing()) {
System.out.println("KeyTab " + klist.name + " not found.");
System.exit(-1);
} else if (!ktab.isValid()) {
System.out.println("KeyTab " + klist.name
+ " format not supported.");
System.exit(-1);
}
klist.target = ktab;
klist.name = ktab.tabName();
klist.displayTab();
break;
default:
if (klist.name != null) {
klist.printHelp();
System.exit(-1);
} else {
klist.target = CredentialsCache.getInstance();
klist.name = CredentialsCache.cacheName();
if (klist.target != null) {
klist.displayCache();
} else {
klist.displayMessage("Credentials cache");
System.exit(-1);
}
}
}
}
/**
* Parses the command line arguments.
*/
void processArgs(String[] args) {
Character arg;
for (int i = 0; i < args.length; i++) {
if ((args[i].length() >= 2) && (args[i].startsWith("-"))) {
arg = new Character(args[i].charAt(1));
switch (arg.charValue()) {
case 'c':
action = 'c';
break;
case 'k':
action = 'k';
break;
case 'a':
options[2] = 'a';
break;
case 'n':
options[3] = 'n';
break;
case 'f':
options[1] = 'f';
break;
case 'e':
options[0] = 'e';
break;
case 'K':
options[1] = 'K';
break;
case 't':
options[2] = 't';
break;
default:
printHelp();
System.exit(-1);
}
} else {
if (!args[i].startsWith("-") && (i == args.length - 1)) {
// the argument is the last one.
name = args[i];
arg = null;
} else {
printHelp(); // incorrect input format.
System.exit(-1);
}
}
}
}
void displayTab() {
KeyTab table = (KeyTab)target;
KeyTabEntry[] entries = table.getEntries();
if (entries.length == 0) {
System.out.println("\nKey tab: " + name +
", " + " 0 entries found.\n");
} else {
if (entries.length == 1)
System.out.println("\nKey tab: " + name +
", " + entries.length + " entry found.\n");
else
System.out.println("\nKey tab: " + name + ", " +
entries.length + " entries found.\n");
for (int i = 0; i < entries.length; i++) {
System.out.println("[" + (i + 1) + "] " +
"Service principal: " +
entries[i].getService().toString());
System.out.println("\t KVNO: " +
entries[i].getKey().getKeyVersionNumber());
if (options[0] == 'e') {
EncryptionKey key = entries[i].getKey();
System.out.println("\t Key type: " +
key.getEType());
}
if (options[1] == 'K') {
EncryptionKey key = entries[i].getKey();
System.out.println("\t Key: " +
entries[i].getKeyString());
}
if (options[2] == 't') {
System.out.println("\t Time stamp: " +
format(entries[i].getTimeStamp()));
}
}
}
}
void displayCache() {
CredentialsCache cache = (CredentialsCache)target;
sun.security.krb5.internal.ccache.Credentials[] creds =
cache.getCredsList();
if (creds == null) {
System.out.println ("No credentials available in the cache " +
name);
System.exit(-1);
}
System.out.println("\nCredentials cache: " + name);
String defaultPrincipal = cache.getPrimaryPrincipal().toString();
int num = creds.length;
if (num == 1)
System.out.println("\nDefault principal: " +
defaultPrincipal + ", " +
creds.length + " entry found.\n");
else
System.out.println("\nDefault principal: " +
defaultPrincipal + ", " +
creds.length + " entries found.\n");
if (creds != null) {
for (int i = 0; i < creds.length; i++) {
try {
String starttime;
String endtime;
String renewTill;
String servicePrincipal;
if (creds[i].getStartTime() != null) {
starttime = format(creds[i].getStartTime());
} else {
starttime = format(creds[i].getAuthTime());
}
endtime = format(creds[i].getEndTime());
servicePrincipal =
creds[i].getServicePrincipal().toString();
System.out.println("[" + (i + 1) + "] " +
" Service Principal: " +
servicePrincipal);
System.out.println(" Valid starting: " + starttime);
System.out.println(" Expires: " + endtime);
if (creds[i].getRenewTill() != null) {
renewTill = format(creds[i].getRenewTill());
System.out.println(
" Renew until: " + renewTill);
}
if (options[0] == 'e') {
String eskey = EType.toString(creds[i].getEType());
String etkt = EType.toString(creds[i].getTktEType());
System.out.println(" EType (skey, tkt): "
+ eskey + ", " + etkt);
}
if (options[1] == 'f') {
System.out.println(" Flags: " +
creds[i].getTicketFlags().toString());
}
if (options[2] == 'a') {
boolean first = true;
InetAddress[] caddr
= creds[i].setKrbCreds().getClientAddresses();
if (caddr != null) {
for (InetAddress ia: caddr) {
String out;
if (options[3] == 'n') {
out = ia.getHostAddress();
} else {
out = ia.getCanonicalHostName();
}
System.out.println(" " +
(first?"Addresses:":" ") +
" " + out);
first = false;
}
} else {
System.out.println(" [No host addresses info]");
}
}
} catch (RealmException e) {
System.out.println("Error reading principal from "+
"the entry.");
if (DEBUG) {
e.printStackTrace();
}
System.exit(-1);
}
}
} else {
System.out.println("\nNo entries found.");
}
}
void displayMessage(String target) {
if (name == null) {
System.out.println("Default " + target + " not found.");
} else {
System.out.println(target + " " + name + " not found.");
}
}
/**
* Reformats the date from the form -
* dow mon dd hh:mm:ss zzz yyyy to mon/dd/yyyy hh:mm
* where dow is the day of the week, mon is the month,
* dd is the day of the month, hh is the hour of
* the day, mm is the minute within the hour,
* ss is the second within the minute, zzz is the time zone,
* and yyyy is the year.
* @param date the string form of Date object.
*/
private String format(KerberosTime kt) {
String date = kt.toDate().toString();
return (date.substring(4, 7) + " " + date.substring(8, 10) +
", " + date.substring(24)
+ " " + date.substring(11, 19));
}
/**
* Prints out the help information.
*/
void printHelp() {
System.out.println("\nUsage: klist " +
"[[-c] [-f] [-e] [-a [-n]]] [-k [-t] [-K]] [name]");
System.out.println(" name\t name of credentials cache or " +
" keytab with the prefix. File-based cache or "
+ "keytab's prefix is FILE:.");
System.out.println(" -c specifies that credential cache is to be " +
"listed");
System.out.println(" -k specifies that key tab is to be listed");
System.out.println(" options for credentials caches:");
System.out.println("\t-f \t shows credentials flags");
System.out.println("\t-e \t shows the encryption type");
System.out.println("\t-a \t shows addresses");
System.out.println("\t -n \t do not reverse-resolve addresses");
System.out.println(" options for keytabs:");
System.out.println("\t-t \t shows keytab entry timestamps");
System.out.println("\t-K \t shows keytab entry key value");
System.out.println("\t-e \t shows keytab entry key type");
System.out.println("\nUsage: java sun.security.krb5.tools.Klist " +
"-help for help.");
}
}
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