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Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PdfEncryptor.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PdfEncryptor.java | 176 |
1 files changed, 176 insertions, 0 deletions
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
+ * <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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