| /* |
| * Copyright (c) 2000, 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 sun.security.provider.certpath; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.security.cert.CertificateEncodingException; |
| import java.security.cert.Certificate; |
| import java.security.cert.CertificateException; |
| import java.security.cert.CertificateFactory; |
| import java.security.cert.CertPath; |
| import java.security.cert.X509Certificate; |
| import java.util.*; |
| |
| import sun.security.pkcs.ContentInfo; |
| import sun.security.pkcs.PKCS7; |
| import sun.security.pkcs.SignerInfo; |
| import sun.security.x509.AlgorithmId; |
| import sun.security.util.DerValue; |
| import sun.security.util.DerOutputStream; |
| import sun.security.util.DerInputStream; |
| |
| /** |
| * A {@link java.security.cert.CertPath CertPath} (certification path) |
| * consisting exclusively of |
| * {@link java.security.cert.X509Certificate X509Certificate}s. |
| * <p> |
| * By convention, X.509 <code>CertPath</code>s are stored from target |
| * to trust anchor. |
| * That is, the issuer of one certificate is the subject of the following |
| * one. However, unvalidated X.509 <code>CertPath</code>s may not follow |
| * this convention. PKIX <code>CertPathValidator</code>s will detect any |
| * departure from this convention and throw a |
| * <code>CertPathValidatorException</code>. |
| * |
| * @author Yassir Elley |
| * @since 1.4 |
| */ |
| public class X509CertPath extends CertPath { |
| |
| private static final long serialVersionUID = 4989800333263052980L; |
| |
| /** |
| * List of certificates in this chain |
| */ |
| private List<X509Certificate> certs; |
| |
| /** |
| * The names of our encodings. PkiPath is the default. |
| */ |
| private static final String COUNT_ENCODING = "count"; |
| private static final String PKCS7_ENCODING = "PKCS7"; |
| private static final String PKIPATH_ENCODING = "PkiPath"; |
| |
| /** |
| * List of supported encodings |
| */ |
| private static final Collection<String> encodingList; |
| |
| static { |
| List<String> list = new ArrayList<>(2); |
| list.add(PKIPATH_ENCODING); |
| list.add(PKCS7_ENCODING); |
| encodingList = Collections.unmodifiableCollection(list); |
| } |
| |
| /** |
| * Creates an <code>X509CertPath</code> from a <code>List</code> of |
| * <code>X509Certificate</code>s. |
| * <p> |
| * The certificates are copied out of the supplied <code>List</code> |
| * object. |
| * |
| * @param certs a <code>List</code> of <code>X509Certificate</code>s |
| * @exception CertificateException if <code>certs</code> contains an element |
| * that is not an <code>X509Certificate</code> |
| */ |
| @SuppressWarnings("unchecked") |
| public X509CertPath(List<? extends Certificate> certs) throws CertificateException { |
| super("X.509"); |
| |
| // Ensure that the List contains only X509Certificates |
| // |
| // Note; The certs parameter is not necessarily to be of Certificate |
| // for some old code. For compatibility, to make sure the exception |
| // is CertificateException, rather than ClassCastException, please |
| // don't use |
| // for (Certificate obj : certs) |
| for (Object obj : certs) { |
| if (obj instanceof X509Certificate == false) { |
| throw new CertificateException |
| ("List is not all X509Certificates: " |
| + obj.getClass().getName()); |
| } |
| } |
| |
| // Assumes that the resulting List is thread-safe. This is true |
| // because we ensure that it cannot be modified after construction |
| // and the methods in the Sun JDK 1.4 implementation of ArrayList that |
| // allow read-only access are thread-safe. |
| this.certs = Collections.unmodifiableList( |
| new ArrayList<X509Certificate>((List<X509Certificate>)certs)); |
| } |
| |
| /** |
| * Creates an <code>X509CertPath</code>, reading the encoded form |
| * from an <code>InputStream</code>. The data is assumed to be in |
| * the default encoding. |
| * |
| * @param is the <code>InputStream</code> to read the data from |
| * @exception CertificateException if an exception occurs while decoding |
| */ |
| public X509CertPath(InputStream is) throws CertificateException { |
| this(is, PKIPATH_ENCODING); |
| } |
| |
| /** |
| * Creates an <code>X509CertPath</code>, reading the encoded form |
| * from an InputStream. The data is assumed to be in the specified |
| * encoding. |
| * |
| * @param is the <code>InputStream</code> to read the data from |
| * @param encoding the encoding used |
| * @exception CertificateException if an exception occurs while decoding or |
| * the encoding requested is not supported |
| */ |
| public X509CertPath(InputStream is, String encoding) |
| throws CertificateException { |
| super("X.509"); |
| |
| switch (encoding) { |
| case PKIPATH_ENCODING: |
| certs = parsePKIPATH(is); |
| break; |
| case PKCS7_ENCODING: |
| certs = parsePKCS7(is); |
| break; |
| default: |
| throw new CertificateException("unsupported encoding"); |
| } |
| } |
| |
| /** |
| * Parse a PKIPATH format CertPath from an InputStream. Return an |
| * unmodifiable List of the certificates. |
| * |
| * @param is the <code>InputStream</code> to read the data from |
| * @return an unmodifiable List of the certificates |
| * @exception CertificateException if an exception occurs |
| */ |
| private static List<X509Certificate> parsePKIPATH(InputStream is) |
| throws CertificateException { |
| List<X509Certificate> certList = null; |
| CertificateFactory certFac = null; |
| |
| if (is == null) { |
| throw new CertificateException("input stream is null"); |
| } |
| |
| try { |
| DerInputStream dis = new DerInputStream(readAllBytes(is)); |
| DerValue[] seq = dis.getSequence(3); |
| if (seq.length == 0) { |
| return Collections.<X509Certificate>emptyList(); |
| } |
| |
| certFac = CertificateFactory.getInstance("X.509"); |
| certList = new ArrayList<X509Certificate>(seq.length); |
| |
| // append certs in reverse order (target to trust anchor) |
| for (int i = seq.length-1; i >= 0; i--) { |
| certList.add((X509Certificate)certFac.generateCertificate |
| (new ByteArrayInputStream(seq[i].toByteArray()))); |
| } |
| |
| return Collections.unmodifiableList(certList); |
| |
| } catch (IOException ioe) { |
| throw new CertificateException("IOException parsing PkiPath data: " |
| + ioe, ioe); |
| } |
| } |
| |
| /** |
| * Parse a PKCS#7 format CertPath from an InputStream. Return an |
| * unmodifiable List of the certificates. |
| * |
| * @param is the <code>InputStream</code> to read the data from |
| * @return an unmodifiable List of the certificates |
| * @exception CertificateException if an exception occurs |
| */ |
| private static List<X509Certificate> parsePKCS7(InputStream is) |
| throws CertificateException { |
| List<X509Certificate> certList; |
| |
| if (is == null) { |
| throw new CertificateException("input stream is null"); |
| } |
| |
| try { |
| if (is.markSupported() == false) { |
| // Copy the entire input stream into an InputStream that does |
| // support mark |
| is = new ByteArrayInputStream(readAllBytes(is)); |
| } |
| PKCS7 pkcs7 = new PKCS7(is); |
| |
| X509Certificate[] certArray = pkcs7.getCertificates(); |
| // certs are optional in PKCS #7 |
| if (certArray != null) { |
| certList = Arrays.asList(certArray); |
| } else { |
| // no certs provided |
| certList = new ArrayList<X509Certificate>(0); |
| } |
| } catch (IOException ioe) { |
| throw new CertificateException("IOException parsing PKCS7 data: " + |
| ioe); |
| } |
| // Assumes that the resulting List is thread-safe. This is true |
| // because we ensure that it cannot be modified after construction |
| // and the methods in the Sun JDK 1.4 implementation of ArrayList that |
| // allow read-only access are thread-safe. |
| return Collections.unmodifiableList(certList); |
| } |
| |
| /* |
| * Reads the entire contents of an InputStream into a byte array. |
| * |
| * @param is the InputStream to read from |
| * @return the bytes read from the InputStream |
| */ |
| private static byte[] readAllBytes(InputStream is) throws IOException { |
| byte[] buffer = new byte[8192]; |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(2048); |
| int n; |
| while ((n = is.read(buffer)) != -1) { |
| baos.write(buffer, 0, n); |
| } |
| return baos.toByteArray(); |
| } |
| |
| /** |
| * Returns the encoded form of this certification path, using the |
| * default encoding. |
| * |
| * @return the encoded bytes |
| * @exception CertificateEncodingException if an encoding error occurs |
| */ |
| @Override |
| public byte[] getEncoded() throws CertificateEncodingException { |
| // @@@ Should cache the encoded form |
| return encodePKIPATH(); |
| } |
| |
| /** |
| * Encode the CertPath using PKIPATH format. |
| * |
| * @return a byte array containing the binary encoding of the PkiPath object |
| * @exception CertificateEncodingException if an exception occurs |
| */ |
| private byte[] encodePKIPATH() throws CertificateEncodingException { |
| |
| ListIterator<X509Certificate> li = certs.listIterator(certs.size()); |
| try { |
| DerOutputStream bytes = new DerOutputStream(); |
| // encode certs in reverse order (trust anchor to target) |
| // according to PkiPath format |
| while (li.hasPrevious()) { |
| X509Certificate cert = li.previous(); |
| // check for duplicate cert |
| if (certs.lastIndexOf(cert) != certs.indexOf(cert)) { |
| throw new CertificateEncodingException |
| ("Duplicate Certificate"); |
| } |
| // get encoded certificates |
| byte[] encoded = cert.getEncoded(); |
| bytes.write(encoded); |
| } |
| |
| // Wrap the data in a SEQUENCE |
| DerOutputStream derout = new DerOutputStream(); |
| derout.write(DerValue.tag_SequenceOf, bytes); |
| return derout.toByteArray(); |
| |
| } catch (IOException ioe) { |
| throw new CertificateEncodingException("IOException encoding " + |
| "PkiPath data: " + ioe, ioe); |
| } |
| } |
| |
| /** |
| * Encode the CertPath using PKCS#7 format. |
| * |
| * @return a byte array containing the binary encoding of the PKCS#7 object |
| * @exception CertificateEncodingException if an exception occurs |
| */ |
| private byte[] encodePKCS7() throws CertificateEncodingException { |
| PKCS7 p7 = new PKCS7(new AlgorithmId[0], |
| new ContentInfo(ContentInfo.DATA_OID, null), |
| certs.toArray(new X509Certificate[certs.size()]), |
| new SignerInfo[0]); |
| DerOutputStream derout = new DerOutputStream(); |
| try { |
| p7.encodeSignedData(derout); |
| } catch (IOException ioe) { |
| throw new CertificateEncodingException(ioe.getMessage()); |
| } |
| return derout.toByteArray(); |
| } |
| |
| /** |
| * Returns the encoded form of this certification path, using the |
| * specified encoding. |
| * |
| * @param encoding the name of the encoding to use |
| * @return the encoded bytes |
| * @exception CertificateEncodingException if an encoding error occurs or |
| * the encoding requested is not supported |
| */ |
| @Override |
| public byte[] getEncoded(String encoding) |
| throws CertificateEncodingException { |
| switch (encoding) { |
| case PKIPATH_ENCODING: |
| return encodePKIPATH(); |
| case PKCS7_ENCODING: |
| return encodePKCS7(); |
| default: |
| throw new CertificateEncodingException("unsupported encoding"); |
| } |
| } |
| |
| /** |
| * Returns the encodings supported by this certification path, with the |
| * default encoding first. |
| * |
| * @return an <code>Iterator</code> over the names of the supported |
| * encodings (as Strings) |
| */ |
| public static Iterator<String> getEncodingsStatic() { |
| return encodingList.iterator(); |
| } |
| |
| /** |
| * Returns an iteration of the encodings supported by this certification |
| * path, with the default encoding first. |
| * <p> |
| * Attempts to modify the returned <code>Iterator</code> via its |
| * <code>remove</code> method result in an |
| * <code>UnsupportedOperationException</code>. |
| * |
| * @return an <code>Iterator</code> over the names of the supported |
| * encodings (as Strings) |
| */ |
| @Override |
| public Iterator<String> getEncodings() { |
| return getEncodingsStatic(); |
| } |
| |
| /** |
| * Returns the list of certificates in this certification path. |
| * The <code>List</code> returned must be immutable and thread-safe. |
| * |
| * @return an immutable <code>List</code> of <code>X509Certificate</code>s |
| * (may be empty, but not null) |
| */ |
| @Override |
| public List<X509Certificate> getCertificates() { |
| return certs; |
| } |
| } |