The SubjectCodeSource.java Java example source code
/*
* Copyright (c) 1999, 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
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*/
package sun.security.provider;
import java.net.URL;
import java.util.*;
import java.security.CodeSource;
import java.security.Principal;
import java.security.cert.Certificate;
import java.lang.reflect.Constructor;
import javax.security.auth.Subject;
import sun.security.provider.PolicyParser.PrincipalEntry;
/**
* <p> This SubjectCodeSource class contains
* a <code>URL, signer certificates, and either a Subject
* (that represents the <code>Subject in the current
* <code>AccessControlContext), or a linked list of Principals
* (that represent a "subject" in a <code>Policy).
*
*/
class SubjectCodeSource extends CodeSource implements java.io.Serializable {
private static final long serialVersionUID = 6039418085604715275L;
private static final java.util.ResourceBundle rb =
java.security.AccessController.doPrivileged
(new java.security.PrivilegedAction<java.util.ResourceBundle>() {
public java.util.ResourceBundle run() {
return (java.util.ResourceBundle.getBundle
("sun.security.util.AuthResources"));
}
});
private Subject subject;
private LinkedList<PrincipalEntry> principals;
private static final Class<?>[] PARAMS = { String.class };
private static final sun.security.util.Debug debug =
sun.security.util.Debug.getInstance("auth", "\t[Auth Access]");
private ClassLoader sysClassLoader;
/**
* Creates a new <code>SubjectCodeSource
* with the given <code>Subject, principals, URL,
* and signers (Certificates). The <code>Subject
* represents the <code>Subject associated with the current
* <code>AccessControlContext.
* The Principals are given as a <code>LinkedList
* of <code>PolicyParser.PrincipalEntry objects.
* Typically either a <code>Subject will be provided,
* or a list of <code>principals will be provided
* (not both).
*
* <p>
*
* @param subject the <code>Subject associated with this
* <code>SubjectCodeSource
*
* @param url the <code>URL associated with this
* <code>SubjectCodeSource
*
* @param certs the signers associated with this
* <code>SubjectCodeSource
*/
SubjectCodeSource(Subject subject,
LinkedList<PrincipalEntry> principals,
URL url, Certificate[] certs) {
super(url, certs);
this.subject = subject;
this.principals = (principals == null ?
new LinkedList<PrincipalEntry>() :
new LinkedList<PrincipalEntry>(principals));
sysClassLoader = java.security.AccessController.doPrivileged
(new java.security.PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return ClassLoader.getSystemClassLoader();
}
});
}
/**
* Get the Principals associated with this <code>SubjectCodeSource.
* The Principals are retrieved as a <code>LinkedList
* of <code>PolicyParser.PrincipalEntry objects.
*
* <p>
*
* @return the Principals associated with this
* <code>SubjectCodeSource as a LinkedList
* of <code>PolicyParser.PrincipalEntry objects.
*/
LinkedList<PrincipalEntry> getPrincipals() {
return principals;
}
/**
* Get the <code>Subject associated with this
* <code>SubjectCodeSource. The Subject
* represents the <code>Subject associated with the
* current <code>AccessControlContext.
*
* <p>
*
* @return the <code>Subject associated with this
* <code>SubjectCodeSource.
*/
Subject getSubject() {
return subject;
}
/**
* Returns true if this <code>SubjectCodeSource object "implies"
* the specified <code>CodeSource.
* More specifically, this method makes the following checks.
* If any fail, it returns false. If they all succeed, it returns true.
*
* <p>
* <ol>
* <li> The provided codesource must not be null.
* <li> codesource must be an instance of SubjectCodeSource.
* <li> super.implies(codesource) must return true.
* <li> for each principal in this codesource's principal list:
* <ol>
* <li> if the principal is an instanceof
* <code>Principal, then the principal must
* imply the provided codesource's <code>Subject.
* <li> if the principal is not an instanceof
* <code>Principal, then the provided
* codesource's <code>Subject must have an
* associated <code>Principal, P, where
* P.getClass().getName equals principal.principalClass,
* and P.getName() equals principal.principalName.
* </ol>
* </ol>
*
* <p>
*
* @param codesource the <code>CodeSource to compare against.
*
* @return true if this <code>SubjectCodeSource implies the
* the specified <code>CodeSource.
*/
public boolean implies(CodeSource codesource) {
LinkedList<PrincipalEntry> subjectList = null;
if (codesource == null ||
!(codesource instanceof SubjectCodeSource) ||
!(super.implies(codesource))) {
if (debug != null)
debug.println("\tSubjectCodeSource.implies: FAILURE 1");
return false;
}
SubjectCodeSource that = (SubjectCodeSource)codesource;
// if the principal list in the policy "implies"
// the Subject associated with the current AccessControlContext,
// then return true
if (this.principals == null) {
if (debug != null)
debug.println("\tSubjectCodeSource.implies: PASS 1");
return true;
}
if (that.getSubject() == null ||
that.getSubject().getPrincipals().size() == 0) {
if (debug != null)
debug.println("\tSubjectCodeSource.implies: FAILURE 2");
return false;
}
ListIterator<PrincipalEntry> li = this.principals.listIterator(0);
while (li.hasNext()) {
PrincipalEntry pppe = li.next();
try {
// use new Principal.implies method
Class<?> pClass = Class.forName(pppe.principalClass,
true, sysClassLoader);
if (!Principal.class.isAssignableFrom(pClass)) {
// not the right subtype
throw new ClassCastException(pppe.principalClass +
" is not a Principal");
}
Constructor<?> c = pClass.getConstructor(PARAMS);
Principal p = (Principal)c.newInstance(new Object[] {
pppe.principalName });
if (!p.implies(that.getSubject())) {
if (debug != null)
debug.println("\tSubjectCodeSource.implies: FAILURE 3");
return false;
} else {
if (debug != null)
debug.println("\tSubjectCodeSource.implies: PASS 2");
return true;
}
} catch (Exception e) {
// simply compare Principals
if (subjectList == null) {
if (that.getSubject() == null) {
if (debug != null)
debug.println("\tSubjectCodeSource.implies: " +
"FAILURE 4");
return false;
}
Iterator<Principal> i =
that.getSubject().getPrincipals().iterator();
subjectList = new LinkedList<PrincipalEntry>();
while (i.hasNext()) {
Principal p = i.next();
PrincipalEntry spppe = new PrincipalEntry
(p.getClass().getName(), p.getName());
subjectList.add(spppe);
}
}
if (!subjectListImpliesPrincipalEntry(subjectList, pppe)) {
if (debug != null)
debug.println("\tSubjectCodeSource.implies: FAILURE 5");
return false;
}
}
}
if (debug != null)
debug.println("\tSubjectCodeSource.implies: PASS 3");
return true;
}
/**
* This method returns, true, if the provided <i>subjectList
* "contains" the <code>Principal specified
* in the provided <i>pppe argument.
*
* Note that the provided <i>pppe argument may have
* wildcards (*) for the <code>Principal class and name,
* which need to be considered.
*
* <p>
*
* @param subjectList a list of PolicyParser.PrincipalEntry objects
* that correspond to all the Principals in the Subject currently
* on this thread's AccessControlContext. <p>
*
* @param pppe the Principals specified in a grant entry.
*
* @return true if the provided <i>subjectList "contains"
* the <code>Principal specified in the provided
* <i>pppe argument.
*/
private boolean subjectListImpliesPrincipalEntry(
LinkedList<PrincipalEntry> subjectList, PrincipalEntry pppe) {
ListIterator<PrincipalEntry> li = subjectList.listIterator(0);
while (li.hasNext()) {
PrincipalEntry listPppe = li.next();
if (pppe.getPrincipalClass().equals
(PrincipalEntry.WILDCARD_CLASS) ||
pppe.getPrincipalClass().equals(listPppe.getPrincipalClass()))
{
if (pppe.getPrincipalName().equals
(PrincipalEntry.WILDCARD_NAME) ||
pppe.getPrincipalName().equals(listPppe.getPrincipalName()))
return true;
}
}
return false;
}
/**
* Tests for equality between the specified object and this
* object. Two <code>SubjectCodeSource objects are considered equal
* if their locations are of identical value, if the two sets of
* Certificates are of identical values, and if the
* Subjects are equal, and if the PolicyParser.PrincipalEntry values
* are of identical values. It is not required that
* the Certificates or PolicyParser.PrincipalEntry values
* be in the same order.
*
* <p>
*
* @param obj the object to test for equality with this object.
*
* @return true if the objects are considered equal, false otherwise.
*/
public boolean equals(Object obj) {
if (obj == this)
return true;
if (super.equals(obj) == false)
return false;
if (!(obj instanceof SubjectCodeSource))
return false;
SubjectCodeSource that = (SubjectCodeSource)obj;
// the principal lists must match
try {
if (this.getSubject() != that.getSubject())
return false;
} catch (SecurityException se) {
return false;
}
if ((this.principals == null && that.principals != null) ||
(this.principals != null && that.principals == null))
return false;
if (this.principals != null && that.principals != null) {
if (!this.principals.containsAll(that.principals) ||
!that.principals.containsAll(this.principals))
return false;
}
return true;
}
/**
* Return a hashcode for this <code>SubjectCodeSource.
*
* <p>
*
* @return a hashcode for this <code>SubjectCodeSource.
*/
public int hashCode() {
return super.hashCode();
}
/**
* Return a String representation of this <code>SubjectCodeSource.
*
* <p>
*
* @return a String representation of this <code>SubjectCodeSource.
*/
public String toString() {
String returnMe = super.toString();
if (getSubject() != null) {
if (debug != null) {
final Subject finalSubject = getSubject();
returnMe = returnMe + "\n" +
java.security.AccessController.doPrivileged
(new java.security.PrivilegedAction<String>() {
public String run() {
return finalSubject.toString();
}
});
} else {
returnMe = returnMe + "\n" + getSubject().toString();
}
}
if (principals != null) {
ListIterator<PrincipalEntry> li = principals.listIterator();
while (li.hasNext()) {
PrincipalEntry pppe = li.next();
returnMe = returnMe + rb.getString("NEWLINE") +
pppe.getPrincipalClass() + " " +
pppe.getPrincipalName();
}
}
return returnMe;
}
}
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