license: Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at
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PDF encryption requires two passwords: the “user password” to open and view the file with restricted permissions, the “owner password” to access the file with all permission.
This small sample shows how to encrypt a file so that it can be viewed, but not printed.
PDDocument doc = PDDocument.load(new File("filename.pdf")); // Define the length of the encryption key. // Possible values are 40, 128 or 256. int keyLength = 256; AccessPermission ap = new AccessPermission(); // disable printing, ap.setCanPrint(false); //disable copying ap.setCanExtractContent(false); //Disable other things if needed... // Owner password (to open the file with all permissions) is "12345" // User password (to open the file but with restricted permissions, is empty here) StandardProtectionPolicy spp = new StandardProtectionPolicy("12345", "", ap); spp.setEncryptionKeyLength(keyLength); //Apply protection doc.protect(spp); doc.save("filename-encrypted.pdf"); doc.close();