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* 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
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/*
* ===========================================================================
* (C) Copyright IBM Corp. 1999 All Rights Reserved.
*
* Copyright 1997 The Open Group Research Institute. All rights reserved.
* ===========================================================================
*
*/
package sun.security.krb5.internal.ccache;
import sun.security.action.GetPropertyAction;
import sun.security.krb5.*;
import sun.security.krb5.internal.*;
import sun.security.util.SecurityProperties;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.StringTokenizer;
import java.util.Vector;
import java.io.IOException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import static java.nio.charset.StandardCharsets.ISO_8859_1;
/**
* CredentialsCache stores credentials(tickets, session keys, etc) in a
* semi-permanent store
* for later use by different program.
*
* @author Yanni Zhang
* @author Ram Marti
*/
public class FileCredentialsCache extends CredentialsCache
implements FileCCacheConstants {
public int version;
public Tag tag; // optional
public PrincipalName primaryPrincipal;
private Vector<Credentials> credentialsList;
private static String dir;
private static boolean DEBUG = Krb5.DEBUG;
public static synchronized FileCredentialsCache acquireInstance(
PrincipalName principal, String cache) {
try {
FileCredentialsCache fcc = new FileCredentialsCache();
if (cache == null) {
cacheName = FileCredentialsCache.getDefaultCacheName();
} else {
cacheName = FileCredentialsCache.checkValidation(cache);
}
if ((cacheName == null) || !(new File(cacheName)).exists()) {
// invalid cache name or the file doesn't exist
return null;
}
if (principal != null) {
fcc.primaryPrincipal = principal;
}
fcc.load(cacheName);
return fcc;
} catch (IOException e) {
// we don't handle it now, instead we return a null at the end.
if (DEBUG) {
e.printStackTrace();
}
} catch (KrbException e) {
// we don't handle it now, instead we return a null at the end.
if (DEBUG) {
e.printStackTrace();
}
}
return null;
}
public static FileCredentialsCache acquireInstance() {
return acquireInstance(null, null);
}
static synchronized FileCredentialsCache New(PrincipalName principal,
String name) {
try {
FileCredentialsCache fcc = new FileCredentialsCache();
cacheName = FileCredentialsCache.checkValidation(name);
if (cacheName == null) {
// invalid cache name or the file doesn't exist
return null;
}
fcc.init(principal, cacheName);
return fcc;
}
catch (IOException e) {
}
catch (KrbException e) {
}
return null;
}
static synchronized FileCredentialsCache New(PrincipalName principal) {
try {
FileCredentialsCache fcc = new FileCredentialsCache();
cacheName = FileCredentialsCache.getDefaultCacheName();
fcc.init(principal, cacheName);
return fcc;
}
catch (IOException e) {
if (DEBUG) {
e.printStackTrace();
}
} catch (KrbException e) {
if (DEBUG) {
e.printStackTrace();
}
}
return null;
}
private FileCredentialsCache() {
}
boolean exists(String cache) {
File file = new File(cache);
if (file.exists()) {
return true;
} else return false;
}
synchronized void init(PrincipalName principal, String name)
throws IOException, KrbException {
primaryPrincipal = principal;
try (FileOutputStream fos = new FileOutputStream(name);
CCacheOutputStream cos = new CCacheOutputStream(fos)) {
version = KRB5_FCC_FVNO_3;
cos.writeHeader(primaryPrincipal, version);
}
load(name);
}
synchronized void load(String name) throws IOException, KrbException {
PrincipalName p;
try (FileInputStream fis = new FileInputStream(name);
CCacheInputStream cis = new CCacheInputStream(fis)) {
version = cis.readVersion();
if (version == KRB5_FCC_FVNO_4) {
tag = cis.readTag();
} else {
tag = null;
if (version == KRB5_FCC_FVNO_1 || version == KRB5_FCC_FVNO_2) {
cis.setNativeByteOrder();
}
}
p = cis.readPrincipal(version);
if (primaryPrincipal != null) {
if (!(primaryPrincipal.match(p))) {
throw new IOException("Primary principals don't match.");
}
} else
primaryPrincipal = p;
credentialsList = new Vector<Credentials>();
while (cis.available() > 0) {
Object cred = cis.readCred(version);
if (cred != null) {
if (cred instanceof Credentials) {
credentialsList.addElement((Credentials)cred);
} else {
addConfigEntry((CredentialsCache.ConfigEntry)cred);
}
}
}
}
}
/**
* Updates the credentials list. If the specified credentials for the
* service is new, add it to the list. If there is an entry in the list,
* replace the old credentials with the new one.
* @param c the credentials.
*/
public synchronized void update(Credentials c) {
if (credentialsList != null) {
if (credentialsList.isEmpty()) {
credentialsList.addElement(c);
} else {
Credentials tmp = null;
boolean matched = false;
for (int i = 0; i < credentialsList.size(); i++) {
tmp = credentialsList.elementAt(i);
if (match(c.sname.getNameStrings(),
tmp.sname.getNameStrings()) &&
((c.sname.getRealmString()).equalsIgnoreCase(
tmp.sname.getRealmString()))) {
matched = true;
if (c.endtime.getTime() >= tmp.endtime.getTime()) {
if (DEBUG) {
System.out.println(" >>> FileCredentialsCache "
+ "Ticket matched, overwrite "
+ "the old one.");
}
credentialsList.removeElementAt(i);
credentialsList.addElement(c);
}
}
}
if (matched == false) {
if (DEBUG) {
System.out.println(" >>> FileCredentialsCache Ticket "
+ "not exactly matched, "
+ "add new one into cache.");
}
credentialsList.addElement(c);
}
}
}
}
public synchronized PrincipalName getPrimaryPrincipal() {
return primaryPrincipal;
}
/**
* Saves the credentials cache file to the disk.
*/
public synchronized void save() throws IOException, Asn1Exception {
try (FileOutputStream fos = new FileOutputStream(cacheName);
CCacheOutputStream cos = new CCacheOutputStream(fos)) {
cos.writeHeader(primaryPrincipal, version);
Credentials[] tmp = null;
if ((tmp = getCredsList()) != null) {
for (int i = 0; i < tmp.length; i++) {
cos.addCreds(tmp[i]);
}
}
for (ConfigEntry e : getConfigEntries()) {
cos.addConfigEntry(primaryPrincipal, e);
}
}
}
boolean match(String[] s1, String[] s2) {
if (s1.length != s2.length) {
return false;
} else {
for (int i = 0; i < s1.length; i++) {
if (!(s1[i].equalsIgnoreCase(s2[i]))) {
return false;
}
}
}
return true;
}
/**
* Returns the list of credentials entries in the cache file.
*/
public synchronized Credentials[] getCredsList() {
if ((credentialsList == null) || (credentialsList.isEmpty())) {
return null;
} else {
Credentials[] tmp = new Credentials[credentialsList.size()];
for (int i = 0; i < credentialsList.size(); i++) {
tmp[i] = credentialsList.elementAt(i);
}
return tmp;
}
}
public Credentials getCreds(LoginOptions options, PrincipalName sname) {
if (options == null) {
return getCreds(sname);
} else {
Credentials[] list = getCredsList();
if (list == null) {
return null;
} else {
for (int i = 0; i < list.length; i++) {
if (sname.match(list[i].sname)) {
if (list[i].flags.match(options)) {
return list[i];
}
}
}
}
return null;
}
}
private List<ConfigEntry> configEntries = new ArrayList<>();
@Override
public void addConfigEntry(ConfigEntry e) {
configEntries.add(e);
}
@Override
public List<ConfigEntry> getConfigEntries() {
return Collections.unmodifiableList(configEntries);
}
/**
* Gets a credentials for a specified service.
* @param sname service principal name.
*/
public Credentials getCreds(PrincipalName sname) {
Credentials[] list = getCredsList();
if (list == null) {
return null;
} else {
for (int i = 0; i < list.length; i++) {
if (sname.match(list[i].sname)) {
return list[i];
}
}
}
return null;
}
public sun.security.krb5.Credentials getInitialCreds() {
Credentials defaultCreds = getDefaultCreds();
if (defaultCreds == null) {
return null;
}
sun.security.krb5.Credentials tgt = defaultCreds.setKrbCreds();
CredentialsCache.ConfigEntry entry = getConfigEntry("proxy_impersonator");
if (entry == null) {
if (DEBUG) {
System.out.println("get normal credential");
}
return tgt;
}
boolean force;
String prop = SecurityProperties.privilegedGetOverridable(
"jdk.security.krb5.default.initiate.credential");
if (prop == null) {
prop = "always-impersonate";
}
switch (prop) {
case "no-impersonate": // never try impersonation
if (DEBUG) {
System.out.println("get normal credential");
}
return tgt;
case "try-impersonate":
force = false;
break;
case "always-impersonate":
force = true;
break;
default:
throw new RuntimeException(
"Invalid jdk.security.krb5.default.initiate.credential");
}
try {
PrincipalName service = new PrincipalName(
new String(entry.getData(), StandardCharsets.UTF_8));
if (!tgt.getClient().equals(service)) {
if (DEBUG) {
System.out.println("proxy_impersonator does not match service name");
}
return force ? null : tgt;
}
PrincipalName client = getPrimaryPrincipal();
Credentials proxy = null;
for (Credentials c : getCredsList()) {
if (c.getClientPrincipal().equals(client)
&& c.getServicePrincipal().equals(service)) {
proxy = c;
break;
}
}
if (proxy == null) {
if (DEBUG) {
System.out.println("Cannot find evidence ticket in ccache");
}
return force ? null : tgt;
}
if (DEBUG) {
System.out.println("Get proxied credential");
}
return tgt.setProxy(proxy.setKrbCreds());
} catch (KrbException e) {
if (DEBUG) {
System.out.println("Impersonation with ccache failed");
}
return force ? null : tgt;
}
}
public Credentials getDefaultCreds() {
Credentials[] list = getCredsList();
if (list == null) {
return null;
} else {
for (int i = list.length-1; i >= 0; i--) {
if (list[i].sname.toString().startsWith("krbtgt")) {
String[] nameStrings = list[i].sname.getNameStrings();
// find the TGT for the current realm krbtgt/realm@realm
if (nameStrings[1].equals(list[i].sname.getRealm().toString())) {
return list[i];
}
}
}
}
return null;
}
/*
* Returns path name of the credentials cache file.
* The path name is searched in the following order:
*
* 1. KRB5CCNAME (bare file name without FILE:)
* 2. /tmp/krb5cc_<uid> on unix systems
* 3. <user.home>/krb5cc_<user.name>
* 4. <user.home>/krb5cc (if can't get <user.name>)
*/
public static String getDefaultCacheName() {
String stdCacheNameComponent = "krb5cc";
String name;
// The env var can start with TYPE:, we only support FILE: here.
// http://docs.oracle.com/cd/E19082-01/819-2252/6n4i8rtr3/index.html
name = java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<String>() {
@Override
public String run() {
String cache = System.getenv("KRB5CCNAME");
if (cache != null &&
(cache.length() >= 5) &&
cache.regionMatches(true, 0, "FILE:", 0, 5)) {
cache = cache.substring(5);
}
return cache;
}
});
if (name != null) {
if (DEBUG) {
System.out.println(">>>KinitOptions cache name is " + name);
}
return name;
}
// get cache name from system.property
String osname = GetPropertyAction.privilegedGetProperty("os.name");
/*
* For Unix platforms we use the default cache name to be
* /tmp/krb5cc_uid ; for all other platforms we use
* {user_home}/krb5cc_{user_name}
* Please note that for Windows we will use LSA to get
* the TGT from the default cache even before we come here;
* however when we create cache we will create a cache under
* {user_home}/krb5cc_{user_name} for non-Unix platforms including
* Windows.
*/
if (osname != null && !osname.startsWith("Windows")) {
long uid = jdk.internal.misc.VM.getuid();
if (uid != -1) {
name = File.separator + "tmp" +
File.separator + stdCacheNameComponent + "_" + uid;
if (DEBUG) {
System.out.println(">>>KinitOptions cache name is " +
name);
}
return name;
} else {
if (DEBUG) {
System.out.println("Error in obtaining uid " +
"for Unix platforms " +
"Using user's home directory");
}
}
}
// we did not get the uid;
String user_name = GetPropertyAction.privilegedGetProperty("user.name");
String user_home = GetPropertyAction.privilegedGetProperty("user.home");
if (user_home == null) {
user_home = GetPropertyAction.privilegedGetProperty("user.dir");
}
if (user_name != null) {
name = user_home + File.separator +
stdCacheNameComponent + "_" + user_name;
} else {
name = user_home + File.separator + stdCacheNameComponent;
}
if (DEBUG) {
System.out.println(">>>KinitOptions cache name is " + name);
}
return name;
}
public static String checkValidation(String name) {
String fullname = null;
if (name == null) {
return null;
}
try {
// get full path name
fullname = (new File(name)).getCanonicalPath();
File fCheck = new File(fullname);
if (!(fCheck.exists())) {
// get absolute directory
File temp = new File(fCheck.getParent());
// test if the directory exists
if (!(temp.isDirectory()))
fullname = null;
temp = null;
}
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