Admin: 1 версия

2010-06-01T06:49:02Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:45Z

Новая страница

== boolean Permission.implies(Permission permission) ==



<source lang="java">

import java.io.Serializable;
import java.security.BasicPermission;
import java.security.Permission;
class IDPermission extends BasicPermission implements Serializable {
String id = null;
public IDPermission(String id) {
super(id);
this.id = id;
}
public boolean implies(Permission permission) {
IDPermission bp = (IDPermission) permission;
return id.equals(bp.id);
}
public String getActions() {
return "";
}
public int hashCode() {
return id.hashCode();
}
public boolean equals(Object obj) {
if (!(obj instanceof IDPermission)) {
return false;
}
IDPermission bp = (IDPermission) obj;
return id.equals(bp.id);
}
}
public class Main {
public static void main(String[] argv) throws Exception {
Permission p1 = new IDPermission("1");
Permission p2 = new IDPermission("2");
boolean b = p1.implies(p2);
p2 = new IDPermission("3");
b = p1.implies(p2);
p2 = new IDPermission("4");
b = p1.implies(p2);
p2 = new IDPermission("5");
b = p1.implies(p2);
p2 = new IDPermission("6");
b = p1.implies(p2);
}
}

</source>



== Checking Read/Write Permission for a Directory ==



<source lang="java">

import java.io.FilePermission;
import java.security.AccessController;
public class Main {
public static void main(String[] argv) throws Exception {
AccessController.checkPermission(new FilePermission("/tmp/*", "read,write"));
}
}

</source>



== Controlling Access to an Object using a permission ==



<source lang="java">

import java.security.AccessControlException;
import java.security.Guard;
import java.security.GuardedObject;
import java.util.PropertyPermission;
public class Main {
public static void main(String[] argv) throws Exception {
String secretObj = "secret";
Guard guard = new PropertyPermission("java.home", "read");
GuardedObject gobj = new GuardedObject(secretObj, guard);
try {
Object o = gobj.getObject();
} catch (AccessControlException e) {
e.printStackTrace();
}
}
}

</source>



== Creating a Custom Permission ==



<source lang="java">

import java.io.Serializable;
import java.security.BasicPermission;
import java.security.Permission;
class IDPermission extends BasicPermission implements Serializable {
String id = null;
public IDPermission(String id) {
super(id);
this.id = id;
}
public boolean implies(Permission permission) {
IDPermission bp = (IDPermission) permission;
return id.equals(bp.id);
}
public String getActions() {
return "";
}
public int hashCode() {
return id.hashCode();
}
public boolean equals(Object obj) {
if (!(obj instanceof IDPermission)) {
return false;
}
IDPermission bp = (IDPermission) obj;
return id.equals(bp.id);
}
}
public class Main {
public static void main(String[] argv) throws Exception {
Permission p1 = new IDPermission("1");
Permission p2 = new IDPermission("2");
boolean b = p1.implies(p2);
p2 = new IDPermission("3");
b = p1.implies(p2);
p2 = new IDPermission("4");
b = p1.implies(p2);
p2 = new IDPermission("5");
b = p1.implies(p2);
p2 = new IDPermission("6");
b = p1.implies(p2);
}
}

</source>



== Determining If One Permission Implies Another ==



<source lang="java">

import java.io.FilePermission;
import java.security.Permission;
public class Main {
public static void main(String[] argv) throws Exception {
Permission perm1 = new FilePermission("/tmp/*", "read,write");
Permission perm2 = new FilePermission("/tmp/abc", "read");
if (perm1.implies(perm2)) {
System.out.println("perm1 implies perm2");
}
}
}

</source>



== extends BasicPermission ==



<source lang="java">

import java.io.Serializable;
import java.security.BasicPermission;
import java.security.Permission;
class IDPermission extends BasicPermission implements Serializable {
String id = null;
public IDPermission(String id) {
super(id);
this.id = id;
}
public boolean implies(Permission permission) {
IDPermission bp = (IDPermission) permission;
return id.equals(bp.id);
}
public String getActions() {
return "";
}
public int hashCode() {
return id.hashCode();
}
public boolean equals(Object obj) {
if (!(obj instanceof IDPermission)) {
return false;
}
IDPermission bp = (IDPermission) obj;
return id.equals(bp.id);
}
}
public class Main {
public static void main(String[] argv) throws Exception {
Permission p1 = new IDPermission("1");
Permission p2 = new IDPermission("2");
boolean b = p1.implies(p2);
p2 = new IDPermission("3");
b = p1.implies(p2);
p2 = new IDPermission("4");
b = p1.implies(p2);
p2 = new IDPermission("5");
b = p1.implies(p2);
p2 = new IDPermission("6");
b = p1.implies(p2);
}
}

</source>



== Guard guard = new PropertyPermission("java.home", "read"); ==



<source lang="java">

import java.security.AccessControlException;
import java.security.Guard;
import java.security.GuardedObject;
import java.util.PropertyPermission;
public class Main {
public static void main(String[] argv) throws Exception {
String secretObj = "secret";
Guard guard = new PropertyPermission("java.home", "read");
GuardedObject gobj = new GuardedObject(secretObj, guard);
try {
Object o = gobj.getObject();
} catch (AccessControlException e) {
e.printStackTrace();
}
}
}

</source>



== Listing All Permissions Granted to a Loaded Class ==



<source lang="java">

import java.security.Permission;
import java.security.PermissionCollection;
import java.security.Policy;
import java.security.ProtectionDomain;
import java.util.Enumeration;
public class Main {
public static void main(String[] argv) throws Exception {
ProtectionDomain domain = String.class.getProtectionDomain();
PermissionCollection pcoll = Policy.getPolicy().getPermissions(domain);
Enumeration e = pcoll.elements();
for (; e.hasMoreElements();) {
Permission p = (Permission) e.nextElement();
}
}
}

</source>



== new GuardedObject(Object obj, Guard) ==



<source lang="java">

import java.security.AccessControlException;
import java.security.Guard;
import java.security.GuardedObject;
import java.util.PropertyPermission;
public class Main {
public static void main(String[] argv) throws Exception {
String secretObj = "secret";
Guard guard = new PropertyPermission("java.home", "read");
GuardedObject gobj = new GuardedObject(secretObj, guard);
try {
Object o = gobj.getObject();
} catch (AccessControlException e) {
e.printStackTrace();
}
}
}

</source>



== Object GuardedObject.getObject() ==



<source lang="java">

import java.security.AccessControlException;
import java.security.Guard;
import java.security.GuardedObject;
import java.util.PropertyPermission;
public class Main {
public static void main(String[] argv) throws Exception {
String secretObj = "secret";
Guard guard = new PropertyPermission("java.home", "read");
GuardedObject gobj = new GuardedObject(secretObj, guard);
try {
Object o = gobj.getObject();
} catch (AccessControlException e) {
e.printStackTrace();
}
}
}

</source>

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Java/Security/Permission - История изменений

Admin: 1 версия

в 18:01, 31 мая 2010