https://openjdk.java.net/ 
/*
 * Copyright (c) 1999, 2015, 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.
 */

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 Subject. The Subject is represented by a Set of Principals. 
 The target name of this 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: 
     CredentialClass {PrincipalClass "PrincipalName"}*


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.

   grant {
     permission javax.security.auth.PrivateCredentialPermission
             "com.sun.PrivateCredential com.sun.Principal \"duke\"",
             "read";
   };

 If CredentialClass is "*", then access is granted to all private Credentials belonging to the specified Subject. If "PrincipalName" is "*", then access is granted to the specified Credential owned by any Subject that has the specified Principal (the actual PrincipalName doesn't matter). For example, the following grants access to the a.b.Credential owned by any Subject that has an a.b.Principal. 
   grant {
     permission javax.security.auth.PrivateCredentialPermission
             "a.b.Credential a.b.Principal "*"",
             "read";
   };

 If both the PrincipalClass and "PrincipalName" are "*", then access is granted to the specified Credential owned by any Subject. 
 In addition, the PrincipalClass/PrincipalName pairing may be repeated:

   grant {
     permission javax.security.auth.PrivateCredentialPermission
             "a.b.Credential a.b.Principal "duke" c.d.Principal "dukette"",
             "read";
   };

 The above grants access to the private Credential, "a.b.Credential", belonging to a Subject with at least two associated Principals: "a.b.Principal" with the name, "duke", and "c.d.Principal", with the name, "dukette". 
Since:1.4
/**
 * 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".
 *
 * @since 1.4
 */
public final class PrivateCredentialPermission extends Permission {

    private static final long serialVersionUID = 5284372143517237068L;

    private static final CredOwner[] EMPTY_PRINCIPALS = new CredOwner[0];

    
@serial
/**
     * @serial
     */
    private String credentialClass;

    
@serialThe Principals associated with this permission. The set contains elements of type, PrivateCredentialPermission.CredOwner.
/**
     * @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
/**
     * @serial
     */
    private boolean testing = false;

    
Create a new PrivateCredentialPermission with the specified credentialClass and Principals. 
/**
     * 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 PrivateCredentialPermission with the specified name. The name specifies both a Credential class and a Principal Set. 
Params:
  • name – the name specifying the Credential class and Principal Set.
  • actions – the actions specifying that the Credential can be read.
Throws:
/**
     * Creates a new {@code PrivateCredentialPermission}
     * with the specified {@code name}.  The {@code name}
     * specifies both a Credential class and a {@code Principal} Set.
     *
     * @param name the name specifying the Credential class and
     *          {@code Principal} Set.
     *
     * @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 PrivateCredentialPermission. 
Returns:the Class name of the Credential associated with this PrivateCredentialPermission.
/**
     * Returns the Class name of the Credential associated with this
     * {@code PrivateCredentialPermission}.
     *
     * @return the Class name of the Credential associated with this
     *          {@code PrivateCredentialPermission}.
     */
    public String getCredentialClass() {
        return credentialClass;
    }

    
Returns the Principal classes and names associated with this PrivateCredentialPermission. The information is returned as a two-dimensional array (array[x][y]). The 'x' value corresponds to the number of Principal class and name pairs. When (y==0), it corresponds to the Principal class value, and when (y==1), it corresponds to the Principal name value. For example, array[0][0] corresponds to the class name of the first Principal in the array. array[0][1] corresponds to the Principal name of the first Principal in the array. 
Returns:the Principal class and names associated with this PrivateCredentialPermission.
/**
     * 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.
     *
     * @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 PrivateCredentialPermission implies the specified Permission. 

This method returns true if:

    

  •  p is an instanceof PrivateCredentialPermission and 
  •  the target name for p is implied by this object's target name. For example: 
     [* 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"].

    



Params:
  • p – the Permission to check against.
Returns:true if this PrivateCredentialPermission implies the specified Permission, false if not.
/**
     * Checks if this {@code PrivateCredentialPermission} implies
     * the specified {@code Permission}.
     *
     * <p>
     *
     * This method returns true if:
     * <ul>
     * <li> {@code p} is an instanceof PrivateCredentialPermission and
     * <li> the target name for {@code p} 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>
     *
     * @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 PrivateCredentialPermission objects for equality. Checks that obj is a 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. 
Params:
  • obj – the object we are testing for equality with this object.
Returns:true if obj is a PrivateCredentialPermission, has the same credential class as this object, and has the same Principals as this object.
/**
     * Checks two {@code PrivateCredentialPermission} objects for
     * equality.  Checks that {@code obj} 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.
     *
     * @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.

Returns:a hash code value for this object.
/**
     * 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".

Returns:the actions (always returns "read").
/**
     * Returns the "canonical string representation" of the actions.
     * This method always returns the String, "read".
     *
     * @return the actions (always returns "read").
     */
    public String getActions() {
        return "read";
    }

    
Return a homogeneous collection of PrivateCredentialPermissions in a PermissionCollection. No such PermissionCollection is defined, so this method always returns null. 
Returns:null in all cases.
/**
     * Return a homogeneous collection of PrivateCredentialPermissions
     * in a {@code PermissionCollection}.
     * No such {@code PermissionCollection} is defined,
     * so this method always returns {@code null}.
     *
     * @return null in all cases.
     */
    public PermissionCollection newPermissionCollection() {
        return null;
    }

    private void init(String name) {

        if (name == null || name.trim().isEmpty()) {
            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)

/**
     * Reads this object from a stream (i.e., deserializes it)
     */
    private void readObject(java.io.ObjectInputStream s) throws
                                        java.io.IOException,
                                        ClassNotFoundException {

        s.defaultReadObject();

        // perform new initialization from the permission name

        if (getName().indexOf(' ') == -1 && getName().indexOf('"') == -1) {

            // name only has a credential class specified
            credentialClass = getName();
            credOwners = EMPTY_PRINCIPALS;

        } else {

            // perform regular initialization
            init(getName());
        }
    }

    
@serialinclude
/**
     * @serial include
     */
    static class CredOwner implements java.io.Serializable {

        private static final long serialVersionUID = -5607449830436408266L;

        
@serial
/**
         * @serial
         */
        String principalClass;
        
@serial
/**
         * @serial
         */
        String principalName;

        CredOwner(String principalClass, String principalName) {
            this.principalClass = principalClass;
            this.principalName = principalName;
        }

        public boolean implies(Object obj) {
            if (obj == null || !(obj instanceof CredOwner))
                return false;

            CredOwner that = (CredOwner)obj;

            if (principalClass.equals("*") ||
                principalClass.equals(that.principalClass)) {

                if (principalName.equals("*") ||
                    principalName.equals(that.principalName)) {
                    return true;
                }
            }

            /**
             * XXX no code yet to support a.b.*
             */

            return false;
        }

        public String toString() {
            MessageFormat form = new MessageFormat(ResourcesMgr.getString
                ("CredOwner.Principal.Class.class.Principal.Name.name"));
            Object[] source = {principalClass, principalName};
            return (form.format(source));
        }
    }
}