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/*
/*
* Copyright 2002 Paulo Soares
*
*
* 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.
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) 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.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*
* 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
* <code>PdfWriter</code>. 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 <code>true</code> for 128 bit key length, <code>false</code> 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
* <code>PdfWriter</code>. 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 <code>true</code> for 128 bit key length, <code>false</code> for 40 bit key length
* @param newInfo an optional <CODE>String</CODE> map to add or change
* the info dictionary. Entries with <CODE>null</CODE>
* 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
* <code>PdfWriter</code>. 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 <code>true</code> for 128 bit key length, <code>false</code> 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
* <code>PdfWriter</code>. 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 <code>true</code> for 128 bit key length, <code>false</code> 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 <CODE>String</CODE> map to add or change
* the info dictionary. Entries with <CODE>null</CODE>
* 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();
}
}
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