src/java.base/share/classes/javax/crypto/CryptoAllPermission.java
changeset 47216 71c04702a3d5
parent 25859 3317bb8137f4
child 57950 4612a3cfb927
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/javax/crypto/CryptoAllPermission.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 1999, 2012, 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.crypto;
+
+import java.security.*;
+import java.util.Enumeration;
+import java.util.Vector;
+
+/**
+ * The CryptoAllPermission is a permission that implies
+ * any other crypto permissions.
+ * <p>
+ *
+ * @see java.security.Permission
+ * @see java.security.AllPermission
+ *
+ * @author Sharon Liu
+ * @since 1.4
+ */
+
+final class CryptoAllPermission extends CryptoPermission {
+
+    private static final long serialVersionUID = -5066513634293192112L;
+
+    // This class is similar to java.security.AllPermission.
+    static final String ALG_NAME = "CryptoAllPermission";
+    static final CryptoAllPermission INSTANCE =
+        new CryptoAllPermission();
+
+    private CryptoAllPermission() {
+        super(ALG_NAME);
+    }
+
+    /**
+     * Checks if the specified permission is implied by
+     * this object.
+     *
+     * @param p the permission to check against.
+     *
+     * @return true if the specified permission is an
+     * instance of CryptoPermission.
+     */
+    public boolean implies(Permission p) {
+         return (p instanceof CryptoPermission);
+    }
+
+    /**
+     * Checks two CryptoAllPermission objects for equality.
+     * Two CryptoAllPermission objects are always equal.
+     *
+     * @param obj the object to test for equality with this object.
+     *
+     * @return true if <i>obj</i> is a CryptoAllPermission object.
+     */
+    public boolean equals(Object obj) {
+        return (obj == INSTANCE);
+    }
+
+    /**
+     *
+     * Returns the hash code value for this object.
+     *
+     * @return a hash code value for this object.
+     */
+    public int hashCode() {
+        return 1;
+    }
+
+    /**
+     * Returns a new PermissionCollection object for storing
+     * CryptoAllPermission objects.
+     * <p>
+     *
+     * @return a new PermissionCollection object suitable for
+     * storing CryptoAllPermissions.
+     */
+    public PermissionCollection newPermissionCollection() {
+        return new CryptoAllPermissionCollection();
+    }
+}
+
+/**
+ * A CryptoAllPermissionCollection stores a collection
+ * of CryptoAllPermission permissions.
+ *
+ * @see java.security.Permission
+ * @see java.security.Permissions
+ * @see javax.crypto.CryptoPermission
+ *
+ * @author Sharon Liu
+ */
+final class CryptoAllPermissionCollection extends PermissionCollection
+    implements java.io.Serializable
+{
+
+    private static final long serialVersionUID = 7450076868380144072L;
+
+    // true if a CryptoAllPermission has been added
+    private boolean all_allowed;
+
+    /**
+     * Create an empty CryptoAllPermissions object.
+     */
+    CryptoAllPermissionCollection() {
+        all_allowed = false;
+    }
+
+    /**
+     * Adds a permission to the CryptoAllPermissions.
+     *
+     * @param permission the Permission object to add.
+     *
+     * @exception SecurityException - if this CryptoAllPermissionCollection
+     * object has been marked readonly
+     */
+    public void add(Permission permission) {
+        if (isReadOnly())
+            throw new SecurityException("attempt to add a Permission to " +
+                                        "a readonly PermissionCollection");
+
+        if (permission != CryptoAllPermission.INSTANCE)
+            return;
+
+        all_allowed = true;
+    }
+
+    /**
+     * Check and see if this set of permissions implies the permissions
+     * expressed in "permission".
+     *
+     * @param permission the Permission object to compare
+     *
+     * @return true if the given permission is implied by this
+     * CryptoAllPermissionCollection.
+     */
+    public boolean implies(Permission permission) {
+        if (!(permission instanceof CryptoPermission)) {
+            return false;
+        }
+        return all_allowed;
+    }
+
+    /**
+     * Returns an enumeration of all the CryptoAllPermission
+     * objects in the  container.
+     *
+     * @return an enumeration of all the CryptoAllPermission objects.
+     */
+    public Enumeration<Permission> elements() {
+        Vector<Permission> v = new Vector<>(1);
+        if (all_allowed) v.add(CryptoAllPermission.INSTANCE);
+        return v.elements();
+    }
+}