| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.xml.security.keys.content.x509; |
| |
| import java.security.cert.X509Certificate; |
| import java.util.Arrays; |
| |
| import org.apache.xml.security.exceptions.XMLSecurityException; |
| import org.apache.xml.security.utils.Constants; |
| import org.apache.xml.security.utils.SignatureElementProxy; |
| import org.apache.xml.security.utils.XMLUtils; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Handles SubjectKeyIdentifier (SKI) for X.509v3. |
| * |
| * @see <A HREF="http://docs.oracle.com/javase/8/docs/api/java/security/cert/X509Extension.html"> |
| * Interface X509Extension</A> |
| */ |
| public class XMLX509SKI extends SignatureElementProxy implements XMLX509DataContent { |
| |
| private static final org.slf4j.Logger LOG = |
| org.slf4j.LoggerFactory.getLogger(XMLX509SKI.class); |
| |
| /** |
| * <CODE>SubjectKeyIdentifier (id-ce-subjectKeyIdentifier) (2.5.29.14)</CODE>: |
| * This extension identifies the public key being certified. It enables |
| * distinct keys used by the same subject to be differentiated |
| * (e.g., as key updating occurs). |
| * <p></p> |
| * A key identifier shall be unique with respect to all key identifiers |
| * for the subject with which it is used. This extension is always non-critical. |
| */ |
| public static final String SKI_OID = "2.5.29.14"; //NOPMD |
| |
| /** |
| * Constructor X509SKI |
| * |
| * @param doc |
| * @param skiBytes |
| */ |
| public XMLX509SKI(Document doc, byte[] skiBytes) { |
| super(doc); |
| this.addBase64Text(skiBytes); |
| } |
| |
| /** |
| * Constructor XMLX509SKI |
| * |
| * @param doc |
| * @param x509certificate |
| * @throws XMLSecurityException |
| */ |
| public XMLX509SKI(Document doc, X509Certificate x509certificate) |
| throws XMLSecurityException { |
| super(doc); |
| this.addBase64Text(XMLX509SKI.getSKIBytesFromCert(x509certificate)); |
| } |
| |
| /** |
| * Constructor XMLX509SKI |
| * |
| * @param element |
| * @param baseURI |
| * @throws XMLSecurityException |
| */ |
| public XMLX509SKI(Element element, String baseURI) throws XMLSecurityException { |
| super(element, baseURI); |
| } |
| |
| /** |
| * Method getSKIBytes |
| * |
| * @return the skibytes |
| * @throws XMLSecurityException |
| */ |
| public byte[] getSKIBytes() throws XMLSecurityException { |
| return this.getBytesFromTextChild(); |
| } |
| |
| /** |
| * Method getSKIBytesFromCert |
| * |
| * @param cert |
| * @return ski bytes from the given certificate |
| * |
| * @throws XMLSecurityException |
| * @see java.security.cert.X509Extension#getExtensionValue(java.lang.String) |
| */ |
| public static byte[] getSKIBytesFromCert(X509Certificate cert) |
| throws XMLSecurityException { |
| |
| if (cert.getVersion() < 3) { |
| Object[] exArgs = { cert.getVersion() }; |
| throw new XMLSecurityException("certificate.noSki.lowVersion", exArgs); |
| } |
| |
| /* |
| * Gets the DER-encoded OCTET string for the extension value |
| * (extnValue) identified by the passed-in oid String. The oid |
| * string is represented by a set of positive whole numbers |
| * separated by periods. |
| */ |
| byte[] extensionValue = cert.getExtensionValue(XMLX509SKI.SKI_OID); |
| if (extensionValue == null) { |
| throw new XMLSecurityException("certificate.noSki.null"); |
| } |
| |
| /** |
| * Strip away first four bytes from the extensionValue |
| * The first two bytes are the tag and length of the extensionValue |
| * OCTET STRING, and the next two bytes are the tag and length of |
| * the ski OCTET STRING. |
| */ |
| byte[] skidValue = new byte[extensionValue.length - 4]; |
| |
| System.arraycopy(extensionValue, 4, skidValue, 0, skidValue.length); |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Base64 of SKI is " + XMLUtils.encodeToString(skidValue)); |
| } |
| |
| return skidValue; |
| } |
| |
| /** {@inheritDoc} */ |
| public boolean equals(Object obj) { |
| if (!(obj instanceof XMLX509SKI)) { |
| return false; |
| } |
| |
| XMLX509SKI other = (XMLX509SKI) obj; |
| |
| try { |
| return Arrays.equals(other.getSKIBytes(), this.getSKIBytes()); |
| } catch (XMLSecurityException ex) { |
| return false; |
| } |
| } |
| |
| public int hashCode() { |
| int result = 17; |
| try { |
| byte[] bytes = getSKIBytes(); |
| for (int i = 0; i < bytes.length; i++) { |
| result = 31 * result + bytes[i]; |
| } |
| } catch (XMLSecurityException e) { |
| LOG.debug(e.getMessage(), e); |
| } |
| return result; |
| |
| } |
| |
| /** {@inheritDoc} */ |
| public String getBaseLocalName() { |
| return Constants._TAG_X509SKI; |
| } |
| } |