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/*
* 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 javax.security.auth;
import java.util.*;
import java.text.MessageFormat;
import java.security.Permission;
import java.security.PermissionCollection;
import java.security.Principal;
import sun.security.util.ResourcesMgr;
/**
* This class is used to protect access to private Credentials
* belonging to a particular {@code Subject}. The {@code Subject}
* is represented by a Set of Principals.
*
* <p> The target name of this {@code Permission} specifies
* a Credential class name, and a Set of Principals.
* The only valid value for this Permission's actions is, "read".
* The target name must abide by the following syntax:
*
* <pre>
* CredentialClass {PrincipalClass "PrincipalName"}*
* </pre>
*
* For example, the following permission grants access to the
* com.sun.PrivateCredential owned by Subjects which have
* a com.sun.Principal with the name, "duke". Note that although
* this example, as well as all the examples below, do not contain
* Codebase, SignedBy, or Principal information in the grant statement
* (for simplicity reasons), actual policy configurations should
* specify that information when appropriate.
*
* <pre>
*
* grant {
* permission javax.security.auth.PrivateCredentialPermission
* "com.sun.PrivateCredential com.sun.Principal \"duke\"",
* "read";
* };
* </pre>
*
* If CredentialClass is "*", then access is granted to
* all private Credentials belonging to the specified
* {@code Subject}.
* If "PrincipalName" is "*", then access is granted to the
* specified Credential owned by any {@code Subject} that has the
* specified {@code Principal} (the actual PrincipalName doesn't matter).
* For example, the following grants access to the
* a.b.Credential owned by any {@code Subject} that has
* an a.b.Principal.
*
* <pre>
* grant {
* permission javax.security.auth.PrivateCredentialPermission
* "a.b.Credential a.b.Principal "*"",
* "read";
* };
* </pre>
*
* If both the PrincipalClass and "PrincipalName" are "*",
* then access is granted to the specified Credential owned by
* any {@code Subject}.
*
* <p> In addition, the PrincipalClass/PrincipalName pairing may be repeated:
*
* <pre>
* grant {
* permission javax.security.auth.PrivateCredentialPermission
* "a.b.Credential a.b.Principal "duke" c.d.Principal "dukette"",
* "read";
* };
* </pre>
*
* The above grants access to the private Credential, "a.b.Credential",
* belonging to a {@code Subject} with at least two associated Principals:
* "a.b.Principal" with the name, "duke", and "c.d.Principal", with the name,
* "dukette".
*
*/
public final class PrivateCredentialPermission extends Permission {
private static final long serialVersionUID = 5284372143517237068L;
private static final CredOwner[] EMPTY_PRINCIPALS = new CredOwner[0];
/**
* @serial
*/
private String credentialClass;
/**
* @serial The Principals associated with this permission.
* The set contains elements of type,
* {@code PrivateCredentialPermission.CredOwner}.
*/
private Set<Principal> principals; // ignored - kept around for compatibility
private transient CredOwner[] credOwners;
/**
* @serial
*/
private boolean testing = false;
/**
* Create a new {@code PrivateCredentialPermission}
* with the specified {@code credentialClass} and Principals.
*/
PrivateCredentialPermission(String credentialClass,
Set<Principal> principals) {
super(credentialClass);
this.credentialClass = credentialClass;
synchronized(principals) {
if (principals.size() == 0) {
this.credOwners = EMPTY_PRINCIPALS;
} else {
this.credOwners = new CredOwner[principals.size()];
int index = 0;
Iterator<Principal> i = principals.iterator();
while (i.hasNext()) {
Principal p = i.next();
this.credOwners[index++] = new CredOwner
(p.getClass().getName(),
p.getName());
}
}
}
}
/**
* Creates a new {@code PrivateCredentialPermission}
* with the specified {@code name}. The {@code name}
* specifies both a Credential class and a {@code Principal} Set.
*
* <p>
*
* @param name the name specifying the Credential class and
* {@code Principal} Set. <p>
*
* @param actions the actions specifying that the Credential can be read.
*
* @throws IllegalArgumentException if {@code name} does not conform
* to the correct syntax or if {@code actions} is not "read".
*/
public PrivateCredentialPermission(String name, String actions) {
super(name);
if (!"read".equalsIgnoreCase(actions))
throw new IllegalArgumentException
(ResourcesMgr.getString("actions.can.only.be.read."));
init(name);
}
/**
* Returns the Class name of the Credential associated with this
* {@code PrivateCredentialPermission}.
*
* <p>
*
* @return the Class name of the Credential associated with this
* {@code PrivateCredentialPermission}.
*/
public String getCredentialClass() {
return credentialClass;
}
/**
* Returns the {@code Principal} classes and names
* associated with this {@code PrivateCredentialPermission}.
* The information is returned as a two-dimensional array (array[x][y]).
* The 'x' value corresponds to the number of {@code Principal}
* class and name pairs. When (y==0), it corresponds to
* the {@code Principal} class value, and when (y==1),
* it corresponds to the {@code Principal} name value.
* For example, array[0][0] corresponds to the class name of
* the first {@code Principal} in the array. array[0][1]
* corresponds to the {@code Principal} name of the
* first {@code Principal} in the array.
*
* <p>
*
* @return the {@code Principal} class and names associated
* with this {@code PrivateCredentialPermission}.
*/
public String[][] getPrincipals() {
if (credOwners == null || credOwners.length == 0) {
return new String[0][0];
}
String[][] pArray = new String[credOwners.length][2];
for (int i = 0; i < credOwners.length; i++) {
pArray[i][0] = credOwners[i].principalClass;
pArray[i][1] = credOwners[i].principalName;
}
return pArray;
}
/**
* Checks if this {@code PrivateCredentialPermission} implies
* the specified {@code Permission}.
*
* <p>
*
* This method returns true if:
* <ul>
* <li> <i>p</i> is an instanceof PrivateCredentialPermission and
* <li> the target name for <i>p</i> is implied by this object's
* target name. For example:
* <pre>
* [* P1 "duke"] implies [a.b.Credential P1 "duke"].
* [C1 P1 "duke"] implies [C1 P1 "duke" P2 "dukette"].
* [C1 P2 "dukette"] implies [C1 P1 "duke" P2 "dukette"].
* </pre>
* </ul>
*
* <p>
*
* @param p the {@code Permission} to check against.
*
* @return true if this {@code PrivateCredentialPermission} implies
* the specified {@code Permission}, false if not.
*/
public boolean implies(Permission p) {
if (p == null || !(p instanceof PrivateCredentialPermission))
return false;
PrivateCredentialPermission that = (PrivateCredentialPermission)p;
if (!impliesCredentialClass(credentialClass, that.credentialClass))
return false;
return impliesPrincipalSet(credOwners, that.credOwners);
}
/**
* Checks two {@code PrivateCredentialPermission} objects for
* equality. Checks that <i>obj</i> is a
* {@code PrivateCredentialPermission},
* and has the same credential class as this object,
* as well as the same Principals as this object.
* The order of the Principals in the respective Permission's
* target names is not relevant.
*
* <p>
*
* @param obj the object we are testing for equality with this object.
*
* @return true if obj is a {@code PrivateCredentialPermission},
* has the same credential class as this object,
* and has the same Principals as this object.
*/
public boolean equals(Object obj) {
if (obj == this)
return true;
if (! (obj instanceof PrivateCredentialPermission))
return false;
PrivateCredentialPermission that = (PrivateCredentialPermission)obj;
return (this.implies(that) && that.implies(this));
}
/**
* Returns the hash code value for this object.
*
* @return a hash code value for this object.
*/
public int hashCode() {
return this.credentialClass.hashCode();
}
/**
* Returns the "canonical string representation" of the actions.
* This method always returns the String, "read".
*
* <p>
*
* @return the actions (always returns "read").
*/
public String getActions() {
return "read";
}
/**
* Return a homogeneous collection of PrivateCredentialPermissions
* in a {@code PermissionCollection}.
* No such {@code PermissionCollection} is defined,
* so this method always returns {@code null}.
*
* <p>
*
* @return null in all cases.
*/
public PermissionCollection newPermissionCollection() {
return null;
}
private void init(String name) {
if (name == null || name.trim().length() == 0) {
throw new IllegalArgumentException("invalid empty name");
}
ArrayList<CredOwner> pList = new ArrayList<>();
StringTokenizer tokenizer = new StringTokenizer(name, " ", true);
String principalClass = null;
String principalName = null;
if (testing)
System.out.println("whole name = " + name);
// get the Credential Class
credentialClass = tokenizer.nextToken();
if (testing)
System.out.println("Credential Class = " + credentialClass);
if (tokenizer.hasMoreTokens() == false) {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("permission.name.name.syntax.invalid."));
Object[] source = {name};
throw new IllegalArgumentException
(form.format(source) + ResourcesMgr.getString
("Credential.Class.not.followed.by.a.Principal.Class.and.Name"));
}
while (tokenizer.hasMoreTokens()) {
// skip delimiter
tokenizer.nextToken();
// get the Principal Class
principalClass = tokenizer.nextToken();
if (testing)
System.out.println(" Principal Class = " + principalClass);
if (tokenizer.hasMoreTokens() == false) {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("permission.name.name.syntax.invalid."));
Object[] source = {name};
throw new IllegalArgumentException
(form.format(source) + ResourcesMgr.getString
("Principal.Class.not.followed.by.a.Principal.Name"));
}
// skip delimiter
tokenizer.nextToken();
// get the Principal Name
principalName = tokenizer.nextToken();
if (!principalName.startsWith("\"")) {
MessageFormat form = new MessageFormat(ResourcesMgr.getString
("permission.name.name.syntax.invalid."));
Object[] source = {name};
throw new IllegalArgumentException
(form.format(source) + ResourcesMgr.getString
("Principal.Name.must.be.surrounded.by.quotes"));
}
if (!principalName.endsWith("\"")) {
// we have a name with spaces in it --
// keep parsing until we find the end quote,
// and keep the spaces in the name
while (tokenizer.hasMoreTokens()) {
principalName = principalName + tokenizer.nextToken();
if (principalName.endsWith("\""))
break;
}
if (!principalName.endsWith("\"")) {
MessageFormat form = new MessageFormat
(ResourcesMgr.getString
("permission.name.name.syntax.invalid."));
Object[] source = {name};
throw new IllegalArgumentException
(form.format(source) + ResourcesMgr.getString
("Principal.Name.missing.end.quote"));
}
}
if (testing)
System.out.println("\tprincipalName = '" + principalName + "'");
principalName = principalName.substring
(1, principalName.length() - 1);
if (principalClass.equals("*") &&
!principalName.equals("*")) {
throw new IllegalArgumentException(ResourcesMgr.getString
("PrivateCredentialPermission.Principal.Class.can.not.be.a.wildcard.value.if.Principal.Name.is.not.a.wildcard.value"));
}
if (testing)
System.out.println("\tprincipalName = '" + principalName + "'");
pList.add(new CredOwner(principalClass, principalName));
}
this.credOwners = new CredOwner[pList.size()];
pList.toArray(this.credOwners);
}
private boolean impliesCredentialClass(String thisC, String thatC) {
// this should never happen
if (thisC == null || thatC == null)
return false;
if (testing)
System.out.println("credential class comparison: " +
thisC + "/" + thatC);
if (thisC.equals("*"))
return true;
/**
* XXX let's not enable this for now --
* if people want it, we'll enable it later
*/
/*
if (thisC.endsWith("*")) {
String cClass = thisC.substring(0, thisC.length() - 2);
return thatC.startsWith(cClass);
}
*/
return thisC.equals(thatC);
}
private boolean impliesPrincipalSet(CredOwner[] thisP, CredOwner[] thatP) {
// this should never happen
if (thisP == null || thatP == null)
return false;
if (thatP.length == 0)
return true;
if (thisP.length == 0)
return false;
for (int i = 0; i < thisP.length; i++) {
boolean foundMatch = false;
for (int j = 0; j < thatP.length; j++) {
if (thisP[i].implies(thatP[j])) {
foundMatch = true;
break;
}
}
if (!foundMatch) {
return false;
}
}
return true;
}
/**
* Reads this object from a stream (i.e., deserializes it)
*/
private void readObject(java.io.ObjectInputStream s) throws
java.io.IOException,
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