jdk/src/share/classes/sun/security/x509/PolicyMappingsExtension.java
changeset 2 90ce3da70b43
child 5506 202f599c92aa
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/security/x509/PolicyMappingsExtension.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,224 @@
+/*
+ * Copyright 1997-2006 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.security.x509;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.*;
+
+import java.security.cert.CertificateException;
+
+import sun.security.util.*;
+
+/**
+ * Represent the Policy Mappings Extension.
+ *
+ * This extension, if present, identifies the certificate policies considered
+ * identical between the issuing and the subject CA.
+ * <p>Extensions are addiitonal attributes which can be inserted in a X509
+ * v3 certificate. For example a "Driving License Certificate" could have
+ * the driving license number as a extension.
+ *
+ * <p>Extensions are represented as a sequence of the extension identifier
+ * (Object Identifier), a boolean flag stating whether the extension is to
+ * be treated as being critical and the extension value itself (this is again
+ * a DER encoding of the extension value).
+ *
+ * @author Amit Kapoor
+ * @author Hemma Prafullchandra
+ * @see Extension
+ * @see CertAttrSet
+ */
+public class PolicyMappingsExtension extends Extension
+implements CertAttrSet<String> {
+    /**
+     * Identifier for this attribute, to be used with the
+     * get, set, delete methods of Certificate, x509 type.
+     */
+    public static final String IDENT = "x509.info.extensions.PolicyMappings";
+    /**
+     * Attribute names.
+     */
+    public static final String NAME = "PolicyMappings";
+    public static final String MAP = "map";
+
+    // Private data members
+    private List<CertificatePolicyMap> maps;
+
+    // Encode this extension value
+    private void encodeThis() throws IOException {
+        if (maps == null || maps.isEmpty()) {
+            this.extensionValue = null;
+            return;
+        }
+        DerOutputStream os = new DerOutputStream();
+        DerOutputStream tmp = new DerOutputStream();
+
+        for (CertificatePolicyMap map : maps) {
+            map.encode(tmp);
+        }
+
+        os.write(DerValue.tag_Sequence, tmp);
+        this.extensionValue = os.toByteArray();
+    }
+
+    /**
+     * Create a PolicyMappings with the List of CertificatePolicyMap.
+     *
+     * @param maps the List of CertificatePolicyMap.
+     */
+    public PolicyMappingsExtension(List<CertificatePolicyMap> map)
+            throws IOException {
+        this.maps = map;
+        this.extensionId = PKIXExtensions.PolicyMappings_Id;
+        this.critical = false;
+        encodeThis();
+    }
+
+    /**
+     * Create a default PolicyMappingsExtension.
+     */
+    public PolicyMappingsExtension() {
+        extensionId = PKIXExtensions.KeyUsage_Id;
+        critical = false;
+        maps = new ArrayList<CertificatePolicyMap>();
+    }
+
+    /**
+     * Create the extension from the passed DER encoded value.
+     *
+     * @params critical true if the extension is to be treated as critical.
+     * @params value an array of DER encoded bytes of the actual value.
+     * @exception ClassCastException if value is not an array of bytes
+     * @exception IOException on error.
+     */
+    public PolicyMappingsExtension(Boolean critical, Object value)
+    throws IOException {
+        this.extensionId = PKIXExtensions.PolicyMappings_Id;
+        this.critical = critical.booleanValue();
+
+        this.extensionValue = (byte[]) value;
+        DerValue val = new DerValue(this.extensionValue);
+        if (val.tag != DerValue.tag_Sequence) {
+            throw new IOException("Invalid encoding for " +
+                                  "PolicyMappingsExtension.");
+        }
+        maps = new ArrayList<CertificatePolicyMap>();
+        while (val.data.available() != 0) {
+            DerValue seq = val.data.getDerValue();
+            CertificatePolicyMap map = new CertificatePolicyMap(seq);
+            maps.add(map);
+        }
+    }
+
+    /**
+     * Returns a printable representation of the policy map.
+     */
+    public String toString() {
+        if (maps == null) return "";
+        String s = super.toString() + "PolicyMappings [\n"
+                 + maps.toString() + "]\n";
+
+        return (s);
+    }
+
+    /**
+     * Write the extension to the OutputStream.
+     *
+     * @param out the OutputStream to write the extension to.
+     * @exception IOException on encoding errors.
+     */
+    public void encode(OutputStream out) throws IOException {
+        DerOutputStream tmp = new DerOutputStream();
+        if (extensionValue == null) {
+            extensionId = PKIXExtensions.PolicyMappings_Id;
+            critical = false;
+            encodeThis();
+        }
+        super.encode(tmp);
+        out.write(tmp.toByteArray());
+    }
+
+    /**
+     * Set the attribute value.
+     */
+    public void set(String name, Object obj) throws IOException {
+        if (name.equalsIgnoreCase(MAP)) {
+            if (!(obj instanceof List)) {
+              throw new IOException("Attribute value should be of" +
+                                    " type List.");
+            }
+            maps = (List<CertificatePolicyMap>)obj;
+        } else {
+          throw new IOException("Attribute name not recognized by " +
+                        "CertAttrSet:PolicyMappingsExtension.");
+        }
+        encodeThis();
+    }
+
+    /**
+     * Get the attribute value.
+     */
+    public Object get(String name) throws IOException {
+        if (name.equalsIgnoreCase(MAP)) {
+            return (maps);
+        } else {
+          throw new IOException("Attribute name not recognized by " +
+                        "CertAttrSet:PolicyMappingsExtension.");
+        }
+    }
+
+    /**
+     * Delete the attribute value.
+     */
+    public void delete(String name) throws IOException {
+        if (name.equalsIgnoreCase(MAP)) {
+            maps = null;
+        } else {
+          throw new IOException("Attribute name not recognized by " +
+                        "CertAttrSet:PolicyMappingsExtension.");
+        }
+        encodeThis();
+    }
+
+    /**
+     * Return an enumeration of names of attributes existing within this
+     * attribute.
+     */
+    public Enumeration<String> getElements () {
+        AttributeNameEnumeration elements = new AttributeNameEnumeration();
+        elements.addElement(MAP);
+
+        return elements.elements();
+    }
+
+    /**
+     * Return the name of this attribute.
+     */
+    public String getName () {
+        return (NAME);
+    }
+}