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package com.sun.enterprise.security;
import java.lang.System;
import java.lang.SecurityManager;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.Iterator;
import java.util.Set;
import java.security.Principal;
import java.security.AccessControlContext;
import java.security.PrivilegedExceptionAction;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;
import javax.security.auth.Subject;
import com.sun.enterprise.deployment.PrincipalImpl;
import com.sun.enterprise.config.serverbeans.*;
import com.sun.enterprise.config.*;
import com.sun.enterprise.security.auth.login.DistinguishedPrincipalCredential;
import com.sun.enterprise.server.ApplicationServer;
import com.sun.web.security.PrincipalGroupFactory;
import com.sun.logging.*;
/**
* This class that extends AbstractSecurityContext that gets
* stored in Thread Local Storage. If the current thread creates
* child threads, the SecurityContext stored in the current
* thread is automatically propogated to the child threads.
*
* This class is used on the server side to represent the
* security context.
*
* Thread Local Storage is a concept introduced in JDK1.2.
* @see java.lang.ThreadLocal
* @see java.lang.InheritableThreadLocal
*
* @author Harish Prabandham
* @author Harpreet Singh
*/
public class SecurityContext extends AbstractSecurityContext {
private static Logger _logger=null;
static {
_logger=LogDomains.getLogger(LogDomains.SECURITY_LOGGER);
}
private static InheritableThreadLocal currentSecCtx =
new InheritableThreadLocal();
private static SecurityContext defaultSecurityContext =
generateDefaultSecurityContext();
private static javax.security.auth.AuthPermission doAsPrivilegedPerm =
new javax.security.auth.AuthPermission("doAsPrivileged");
// Did the client log in as or did the server generate the context
private boolean SERVER_GENERATED_SECURITY_CONTEXT = false;
/* This creates a new SecurityContext object.
* Note: that the docs for Subject state that the internal sets
* (eg. the principal set) cannot be modified unless the caller
* has the modifyPrincipals AuthPermission. That said, there may
* be some value to setting the Subject read only.
* Note: changing the principals in the embedded subject (after
* construction will likely cause problem in the principal set
* keyed HashMaps of EJBSecurityManager.
* @param username The name of the user/caller principal.
* @param subject contains the authenticated principals and credential.
*/
public SecurityContext(String userName, Subject subject) {
Subject s = subject;
if (s == null) {
s = new Subject();
if (_logger.isLoggable(Level.WARNING)) {
_logger.warning("java_security.null_subject");
}
}
this.initiator = new PrincipalImpl(userName);
final Subject sub = s;
this.subject = (Subject)
AppservAccessController.doPrivileged(new PrivilegedAction(){
public java.lang.Object run() {
sub.getPrincipals().add(initiator);
return sub;
}
});
}
/**
* Create a SecurityContext with given subject having
* DistinguishedPrincipalCredential.
* This is used for JMAC environment.
* @param subject
*/
public SecurityContext(Subject subject) {
if (subject == null) {
subject = new Subject();
if (_logger.isLoggable(Level.WARNING)) {
_logger.warning("java_security.null_subject");
}
}
final Subject fsub = subject;
this.subject = subject;
this.initiator = (Principal)
AppservAccessController.doPrivileged(new PrivilegedAction(){
public java.lang.Object run() {
Principal prin = null;
Iterator pcIter = fsub.getPublicCredentials().iterator();
while (pcIter.hasNext()) {
Object obj = pcIter.next();
if (obj instanceof DistinguishedPrincipalCredential) {
DistinguishedPrincipalCredential dpc =
(DistinguishedPrincipalCredential)obj;
prin = dpc.getPrincipal();
break;
}
}
// for old auth module
if (prin == null) {
Iterator<Principal> prinIter = fsub.getPrincipals().iterator();
if (prinIter.hasNext()) {
prin = prinIter.next();
}
}
return prin;
}
});
if (this.initiator == null) {
this.initiator = getDefaultCallerPrincipal();
}
}
public SecurityContext(String userName, Subject subject, String realm) {
Subject s = subject;
if (s == null) {
s = new Subject();
if (_logger.isLoggable(Level.WARNING)) {
_logger.warning("java_security.null_subject");
}
}
this.initiator = PrincipalGroupFactory.getPrincipalInstance(userName, realm);
final Subject sub = s;
this.subject = (Subject)
AppservAccessController.doPrivileged(new PrivilegedAction(){
public java.lang.Object run() {
sub.getPrincipals().add(initiator);
return sub;
}
});
}
/* private constructor for constructing default security context
*/
private SecurityContext() {
this.subject = new Subject();
// delay assignment of caller principal until it is requested
this.initiator = null;
this.setServerGeneratedCredentials();
// read only is only done for guest logins.
this.subject.setReadOnly();
}
/**
* Initialize the SecurityContext and handle the unauthenticated
* principal case
*/
public static SecurityContext init(){
SecurityContext sc = (SecurityContext) currentSecCtx.get();
if(sc == null) { // there is no current security context...
sc = defaultSecurityContext;
}
return sc;
}
public static SecurityContext getDefaultSecurityContext(){
//unauthen. Security Context.
return defaultSecurityContext;
}
public static Subject getDefaultSubject(){
//Subject of unauthen. Security Context.
return defaultSecurityContext.subject;
}
// ger caller principal of unauthenticated Security Context
public static Principal getDefaultCallerPrincipal(){
synchronized(SecurityContext.class) {
if (defaultSecurityContext.initiator == null) {
String guestUser = null;
try {
guestUser = (String)
AppservAccessController.doPrivileged(new PrivilegedExceptionAction() {
public java.lang.Object run() throws Exception {
ConfigContext configContext =
ApplicationServer.getServerContext().
getConfigContext();
assert(configContext != null);
SecurityService securityBean =
ServerBeansFactory.
getSecurityServiceBean(configContext);
assert(securityBean != null);
return securityBean.getDefaultPrincipal();
}
});
} catch (Exception e) {
_logger.log(Level.SEVERE,
"java_security.default_user_login_Exception", e);
} finally {
if (guestUser == null) {
guestUser = "ANONYMOUS";
}
}
defaultSecurityContext.initiator = new PrincipalImpl(guestUser);
}
}
return defaultSecurityContext.initiator;
}
private static SecurityContext generateDefaultSecurityContext() {
synchronized (SecurityContext.class) {
try{
return (SecurityContext)
AppservAccessController.doPrivileged(new PrivilegedExceptionAction() {
public java.lang.Object run() throws Exception{
return new SecurityContext();
}
});
} catch(Exception e){
_logger.log(Level.SEVERE,
"java_security.security_context_exception",e);
}
}
return null;
}
/**
* No need to unmarshall the unauthenticated principal....
*/
public static void reset(SecurityContext sc){
setCurrent(sc);
}
/**
* This method gets the SecurityContext stored in the
* Thread Local Store (TLS) of the current thread.
* @return The current Security Context stored in TLS. It returns
* null if SecurityContext could not be found in the current thread.
*/
public static SecurityContext getCurrent() {
SecurityContext sc = (SecurityContext) currentSecCtx.get();
if (sc == null) {
sc = defaultSecurityContext;
}
return sc;
}
/**
* This method sets the SecurityContext stored in the TLS.
* @param The Security Context that should be stored in TLS.
* This public static method needs to be protected
* such that it can only be called by container code. Otherwise
* it can be called by application code to set its subject (which the
* EJB security manager will use to create a domain combiner,
* and then everything the ejb does will be run as the
* corresponding subject.
*/
public static void setCurrent(SecurityContext sc) {
if (sc != null && sc != defaultSecurityContext) {
SecurityContext current = (SecurityContext)currentSecCtx.get();
if (sc != current) {
boolean permitted = false;
try {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
if(_logger.isLoggable(Level.FINE)){
_logger.fine("permission check done to set SecurityContext");
}
sm.checkPermission(doAsPrivilegedPerm);
}
permitted = true;
} catch (java.lang.SecurityException se) {
_logger.log(Level.SEVERE, "java_security.security_context_permission_exception", se);
} catch (Throwable t) {
_logger.log(Level.SEVERE, "java_security.security_context_unexpected_exception", t);
}
if (permitted) {
currentSecCtx.set(sc);
} else {
_logger.severe("java_security.security_context_nochange");
}
}
} else {
currentSecCtx.set(sc);
}
}
public static void setUnauthenticatedContext() {
currentSecCtx.set(defaultSecurityContext);
}
public boolean didServerGenerateCredentials (){
return SERVER_GENERATED_SECURITY_CONTEXT;
}
private void setServerGeneratedCredentials(){
SERVER_GENERATED_SECURITY_CONTEXT = true;
}
/**
* This method returns the caller principal.
* This information may be redundant since the same information
* can be inferred by inspecting the Credentials of the caller.
* @return The caller Principal.
*/
public Principal getCallerPrincipal() {
return this == defaultSecurityContext ? getDefaultCallerPrincipal() : initiator;
}
public Subject getSubject() {
return subject;
}
public String toString() {
return "SecurityContext[ " + "Initiator: " +
initiator + "Subject " + subject + " ]";
}
public Set getPrincipalSet() {
return subject.getPrincipals();
}
}
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