From 6025b6016517c6d898d8957d1d7e03ba71431912 Mon Sep 17 00:00:00 2001 From: tknall Date: Fri, 1 Dec 2006 12:20:24 +0000 Subject: Initial import of release 2.2. git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c --- .../java/com/lowagie/text/pdf/PdfEncryptor.java | 176 +++++++++++++++++++++ 1 file changed, 176 insertions(+) create mode 100644 src/main/java/com/lowagie/text/pdf/PdfEncryptor.java (limited to 'src/main/java/com/lowagie/text/pdf/PdfEncryptor.java') diff --git a/src/main/java/com/lowagie/text/pdf/PdfEncryptor.java b/src/main/java/com/lowagie/text/pdf/PdfEncryptor.java new file mode 100644 index 0000000..7bea4d5 --- /dev/null +++ b/src/main/java/com/lowagie/text/pdf/PdfEncryptor.java @@ -0,0 +1,176 @@ +/* +/* + * Copyright 2002 Paulo Soares + * + * The contents of this file are subject to the Mozilla Public License Version 1.1 + * (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.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the License. + * + * The Original Code is 'iText, a free JAVA-PDF library'. + * + * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by + * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. + * All Rights Reserved. + * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer + * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. + * + * Contributor(s): all the names of the contributors are added in the source code + * where applicable. + * + * Alternatively, the contents of this file may be used under the terms of the + * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the + * provisions of LGPL are applicable instead of those above. If you wish to + * allow use of your version of this file only under the terms of the LGPL + * License and not to allow others to use your version of this file under + * the MPL, indicate your decision by deleting the provisions above and + * replace them with the notice and other provisions required by the LGPL. + * If you do not delete the provisions above, a recipient may use your version + * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the MPL as stated above or under the terms of the GNU + * Library General Public License as published by the Free Software Foundation; + * either version 2 of the License, or any later version. + * + * This library 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 Library general Public License for more + * details. + * + * If you didn't download this code from the following link, you should check if + * you aren't using an obsolete version: + * http://www.lowagie.com/iText/ + */ + +package com.lowagie.text.pdf; + +import java.io.OutputStream; +import java.io.IOException; +import com.lowagie.text.DocumentException; +import java.util.HashMap; + +/** This class takes any PDF and returns exactly the same but + * encrypted. All the content, links, outlines, etc, are kept. + * It is also possible to change the info dictionary. + */ +public class PdfEncryptor { + + private PdfEncryptor(){ + } + + /** Entry point to encrypt a PDF document. The encryption parameters are the same as in + * PdfWriter. The userPassword and the + * ownerPassword can be null or have zero length. In this case the ownerPassword + * is replaced by a random string. The open permissions for the document can be + * AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, + * AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. + * The permissions can be combined by ORing them. + * @param reader the read PDF + * @param os the output destination + * @param userPassword the user password. Can be null or empty + * @param ownerPassword the owner password. Can be null or empty + * @param permissions the user permissions + * @param strength128Bits true for 128 bit key length, false for 40 bit key length + * @throws DocumentException on error + * @throws IOException on error */ + public static void encrypt(PdfReader reader, OutputStream os, byte userPassword[], byte ownerPassword[], int permissions, boolean strength128Bits) throws DocumentException, IOException { + PdfStamper stamper = new PdfStamper(reader, os); + stamper.setEncryption(userPassword, ownerPassword, permissions, strength128Bits); + stamper.close(); + } + + /** Entry point to encrypt a PDF document. The encryption parameters are the same as in + * PdfWriter. The userPassword and the + * ownerPassword can be null or have zero length. In this case the ownerPassword + * is replaced by a random string. The open permissions for the document can be + * AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, + * AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. + * The permissions can be combined by ORing them. + * @param reader the read PDF + * @param os the output destination + * @param userPassword the user password. Can be null or empty + * @param ownerPassword the owner password. Can be null or empty + * @param permissions the user permissions + * @param strength128Bits true for 128 bit key length, false for 40 bit key length + * @param newInfo an optional String map to add or change + * the info dictionary. Entries with null + * values delete the key in the original info dictionary + * @throws DocumentException on error + * @throws IOException on error + */ + public static void encrypt(PdfReader reader, OutputStream os, byte userPassword[], byte ownerPassword[], int permissions, boolean strength128Bits, HashMap newInfo) throws DocumentException, IOException { + PdfStamper stamper = new PdfStamper(reader, os); + stamper.setEncryption(userPassword, ownerPassword, permissions, strength128Bits); + stamper.setMoreInfo(newInfo); + stamper.close(); + } + + /** Entry point to encrypt a PDF document. The encryption parameters are the same as in + * PdfWriter. The userPassword and the + * ownerPassword can be null or have zero length. In this case the ownerPassword + * is replaced by a random string. The open permissions for the document can be + * AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, + * AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. + * The permissions can be combined by ORing them. + * @param reader the read PDF + * @param os the output destination + * @param strength true for 128 bit key length, false for 40 bit key length + * @param userPassword the user password. Can be null or empty + * @param ownerPassword the owner password. Can be null or empty + * @param permissions the user permissions + * @throws DocumentException on error + * @throws IOException on error */ + public static void encrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions) throws DocumentException, IOException { + PdfStamper stamper = new PdfStamper(reader, os); + stamper.setEncryption(strength, userPassword, ownerPassword, permissions); + stamper.close(); + } + + /** Entry point to encrypt a PDF document. The encryption parameters are the same as in + * PdfWriter. The userPassword and the + * ownerPassword can be null or have zero length. In this case the ownerPassword + * is replaced by a random string. The open permissions for the document can be + * AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, + * AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. + * The permissions can be combined by ORing them. + * @param reader the read PDF + * @param os the output destination + * @param strength true for 128 bit key length, false for 40 bit key length + * @param userPassword the user password. Can be null or empty + * @param ownerPassword the owner password. Can be null or empty + * @param permissions the user permissions + * @param newInfo an optional String map to add or change + * the info dictionary. Entries with null + * values delete the key in the original info dictionary + * @throws DocumentException on error + * @throws IOException on error + */ + public static void encrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions, HashMap newInfo) throws DocumentException, IOException { + PdfStamper stamper = new PdfStamper(reader, os); + stamper.setEncryption(strength, userPassword, ownerPassword, permissions); + stamper.setMoreInfo(newInfo); + stamper.close(); + } + + /** + * Give you a verbose analysis of the permissions. + * @param permissions the permissions value of a PDF file + * @return a String that explains the meaning of the permissions value + */ + public static String getPermissionsVerbose(int permissions) { + StringBuffer buf = new StringBuffer("Allowed:"); + if ((PdfWriter.AllowPrinting & permissions) == PdfWriter.AllowPrinting) buf.append(" Printing"); + if ((PdfWriter.AllowModifyContents & permissions) == PdfWriter.AllowModifyContents) buf.append(" Modify contents"); + if ((PdfWriter.AllowCopy & permissions) == PdfWriter.AllowCopy) buf.append(" Copy"); + if ((PdfWriter.AllowModifyAnnotations & permissions) == PdfWriter.AllowModifyAnnotations) buf.append(" Modify annotations"); + if ((PdfWriter.AllowFillIn & permissions) == PdfWriter.AllowFillIn) buf.append(" Fill in"); + if ((PdfWriter.AllowScreenReaders & permissions) == PdfWriter.AllowScreenReaders) buf.append(" Screen readers"); + if ((PdfWriter.AllowAssembly & permissions) == PdfWriter.AllowAssembly) buf.append(" Assembly"); + if ((PdfWriter.AllowDegradedPrinting & permissions) == PdfWriter.AllowDegradedPrinting) buf.append(" Degraded printing"); + return buf.toString(); + } +} \ No newline at end of file -- cgit v1.2.3