/*
 * Copyright (c) 1996, 2015, 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.pkcs;

import java.io.*;

import sun.security.util.*;

A ContentInfo type, as defined in PKCS#7.
Author:Benjamin Renaud
/** * A ContentInfo type, as defined in PKCS#7. * * @author Benjamin Renaud */
public class ContentInfo { // pkcs7 pre-defined content types private static int[] pkcs7 = {1, 2, 840, 113549, 1, 7}; private static int[] data = {1, 2, 840, 113549, 1, 7, 1}; private static int[] sdata = {1, 2, 840, 113549, 1, 7, 2}; private static int[] edata = {1, 2, 840, 113549, 1, 7, 3}; private static int[] sedata = {1, 2, 840, 113549, 1, 7, 4}; private static int[] ddata = {1, 2, 840, 113549, 1, 7, 5}; private static int[] crdata = {1, 2, 840, 113549, 1, 7, 6}; private static int[] nsdata = {2, 16, 840, 1, 113730, 2, 5}; // timestamp token (id-ct-TSTInfo) from RFC 3161 private static int[] tstInfo = {1, 2, 840, 113549, 1, 9, 16, 1, 4}; // this is for backwards-compatibility with JDK 1.1.x private static final int[] OLD_SDATA = {1, 2, 840, 1113549, 1, 7, 2}; private static final int[] OLD_DATA = {1, 2, 840, 1113549, 1, 7, 1}; public static ObjectIdentifier PKCS7_OID; public static ObjectIdentifier DATA_OID; public static ObjectIdentifier SIGNED_DATA_OID; public static ObjectIdentifier ENVELOPED_DATA_OID; public static ObjectIdentifier SIGNED_AND_ENVELOPED_DATA_OID; public static ObjectIdentifier DIGESTED_DATA_OID; public static ObjectIdentifier ENCRYPTED_DATA_OID; public static ObjectIdentifier OLD_SIGNED_DATA_OID; public static ObjectIdentifier OLD_DATA_OID; public static ObjectIdentifier NETSCAPE_CERT_SEQUENCE_OID; public static ObjectIdentifier TIMESTAMP_TOKEN_INFO_OID; static { PKCS7_OID = ObjectIdentifier.newInternal(pkcs7); DATA_OID = ObjectIdentifier.newInternal(data); SIGNED_DATA_OID = ObjectIdentifier.newInternal(sdata); ENVELOPED_DATA_OID = ObjectIdentifier.newInternal(edata); SIGNED_AND_ENVELOPED_DATA_OID = ObjectIdentifier.newInternal(sedata); DIGESTED_DATA_OID = ObjectIdentifier.newInternal(ddata); ENCRYPTED_DATA_OID = ObjectIdentifier.newInternal(crdata); OLD_SIGNED_DATA_OID = ObjectIdentifier.newInternal(OLD_SDATA); OLD_DATA_OID = ObjectIdentifier.newInternal(OLD_DATA); /** * The ASN.1 systax for the Netscape Certificate Sequence * data type is defined * <a href=http://wp.netscape.com/eng/security/comm4-cert-download.html> * here.</a> */ NETSCAPE_CERT_SEQUENCE_OID = ObjectIdentifier.newInternal(nsdata); TIMESTAMP_TOKEN_INFO_OID = ObjectIdentifier.newInternal(tstInfo); } ObjectIdentifier contentType; DerValue content; // OPTIONAL public ContentInfo(ObjectIdentifier contentType, DerValue content) { this.contentType = contentType; this.content = content; }
Make a contentInfo of type data.
/** * Make a contentInfo of type data. */
public ContentInfo(byte[] bytes) { DerValue octetString = new DerValue(DerValue.tag_OctetString, bytes); this.contentType = DATA_OID; this.content = octetString; }
Parses a PKCS#7 content info.
/** * Parses a PKCS#7 content info. */
public ContentInfo(DerInputStream derin) throws IOException, ParsingException { this(derin, false); }
Parses a PKCS#7 content info.

This constructor is used only for backwards compatibility with PKCS#7 blocks that were generated using JDK1.1.x.

Params:
  • derin – the ASN.1 encoding of the content info.
  • oldStyle – flag indicating whether or not the given content info is encoded according to JDK1.1.x.
/** * Parses a PKCS#7 content info. * * <p>This constructor is used only for backwards compatibility with * PKCS#7 blocks that were generated using JDK1.1.x. * * @param derin the ASN.1 encoding of the content info. * @param oldStyle flag indicating whether or not the given content info * is encoded according to JDK1.1.x. */
public ContentInfo(DerInputStream derin, boolean oldStyle) throws IOException, ParsingException { DerInputStream disType; DerInputStream disTaggedContent; DerValue type; DerValue taggedContent; DerValue[] typeAndContent; DerValue[] contents; typeAndContent = derin.getSequence(2); // Parse the content type type = typeAndContent[0]; disType = new DerInputStream(type.toByteArray()); contentType = disType.getOID(); if (oldStyle) { // JDK1.1.x-style encoding content = typeAndContent[1]; } else { // This is the correct, standards-compliant encoding. // Parse the content (OPTIONAL field). // Skip the [0] EXPLICIT tag by pretending that the content is the // one and only element in an implicitly tagged set if (typeAndContent.length > 1) { // content is OPTIONAL taggedContent = typeAndContent[1]; disTaggedContent = new DerInputStream(taggedContent.toByteArray()); contents = disTaggedContent.getSet(1, true); content = contents[0]; } } } public DerValue getContent() { return content; } public ObjectIdentifier getContentType() { return contentType; } public byte[] getData() throws IOException { if (contentType.equals(DATA_OID) || contentType.equals(OLD_DATA_OID) || contentType.equals(TIMESTAMP_TOKEN_INFO_OID)) { if (content == null) return null; else return content.getOctetString(); } throw new IOException("content type is not DATA: " + contentType); } public void encode(DerOutputStream out) throws IOException { DerOutputStream contentDerCode; DerOutputStream seq; seq = new DerOutputStream(); seq.putOID(contentType); // content is optional, it could be external if (content != null) { DerValue taggedContent = null; contentDerCode = new DerOutputStream(); content.encode(contentDerCode); // Add the [0] EXPLICIT tag in front of the content encoding taggedContent = new DerValue((byte)0xA0, contentDerCode.toByteArray()); seq.putDerValue(taggedContent); } out.write(DerValue.tag_Sequence, seq); }
Returns a byte array representation of the data held in the content field.
/** * Returns a byte array representation of the data held in * the content field. */
public byte[] getContentBytes() throws IOException { if (content == null) return null; DerInputStream dis = new DerInputStream(content.toByteArray()); return dis.getOctetString(); } public String toString() { String out = ""; out += "Content Info Sequence\n\tContent type: " + contentType + "\n"; out += "\tContent: " + content; return out; } }