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 --- src/main/java/com/lowagie/text/pdf/PRStream.java | 229 +++++++++++++++++++++++ 1 file changed, 229 insertions(+) create mode 100644 src/main/java/com/lowagie/text/pdf/PRStream.java (limited to 'src/main/java/com/lowagie/text/pdf/PRStream.java') diff --git a/src/main/java/com/lowagie/text/pdf/PRStream.java b/src/main/java/com/lowagie/text/pdf/PRStream.java new file mode 100644 index 0000000..272a45f --- /dev/null +++ b/src/main/java/com/lowagie/text/pdf/PRStream.java @@ -0,0 +1,229 @@ +/* + * $Id: PRStream.java,v 1.46 2005/05/04 14:32:34 blowagie Exp $ + * $Name: $ + * + * Copyright 2001, 2002 by 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.*; +import com.lowagie.text.ExceptionConverter; +import java.util.zip.DeflaterOutputStream; +import com.lowagie.text.Document; +import java.io.OutputStream; +import java.io.IOException; + +public class PRStream extends PdfStream { + + protected PdfReader reader; + protected int offset; + protected int length; + + //added by ujihara for decryption + protected int objNum = 0; + protected int objGen = 0; + + public PRStream(PRStream stream, PdfDictionary newDic) { + reader = stream.reader; + offset = stream.offset; + length = stream.length; + compressed = stream.compressed; + streamBytes = stream.streamBytes; + bytes = stream.bytes; + objNum = stream.objNum; + objGen = stream.objGen; + if (newDic != null) + putAll(newDic); + else + hashMap.putAll(stream.hashMap); + } + + public PRStream(PRStream stream, PdfDictionary newDic, PdfReader reader) { + this(stream, newDic); + this.reader = reader; + } + + public PRStream(PdfReader reader, int offset) { + this.reader = reader; + this.offset = offset; + } + + public PRStream(PdfReader reader, byte conts[]) { + this.reader = reader; + this.offset = -1; + if (Document.compress) { + try { + ByteArrayOutputStream stream = new ByteArrayOutputStream(); + DeflaterOutputStream zip = new DeflaterOutputStream(stream); + zip.write(conts); + zip.close(); + bytes = stream.toByteArray(); + } + catch (IOException ioe) { + throw new ExceptionConverter(ioe); + } + put(PdfName.FILTER, PdfName.FLATEDECODE); + } + else + bytes = conts; + setLength(bytes.length); + } + + /**Sets the data associated with the stream + * @param data raw data, decrypted and uncompressed. + */ + public void setData(byte[] data) { + remove(PdfName.FILTER); + this.offset = -1; + if (Document.compress) { + try { + ByteArrayOutputStream stream = new ByteArrayOutputStream(); + DeflaterOutputStream zip = new DeflaterOutputStream(stream); + zip.write(data); + zip.close(); + bytes = stream.toByteArray(); + } + catch (IOException ioe) { + throw new ExceptionConverter(ioe); + } + put(PdfName.FILTER, PdfName.FLATEDECODE); + } + else + bytes = data; + setLength(bytes.length); + } + + public void setLength(int length) { + this.length = length; + put(PdfName.LENGTH, new PdfNumber(length)); + } + + public int getOffset() { + return offset; + } + + public int getLength() { + return length; + } + + public PdfReader getReader() { + return reader; + } + + public byte[] getBytes() { + return bytes; + } + + public void setObjNum(int objNum, int objGen) { + this.objNum = objNum; + this.objGen = objGen; + } + + int getObjNum() { + return objNum; + } + + int getObjGen() { + return objGen; + } + + public void toPdf(PdfWriter writer, OutputStream os) throws IOException { + superToPdf(writer, os); + os.write(STARTSTREAM); + if (length > 0) { + PdfEncryption crypto = null; + if (writer != null) + crypto = writer.getEncryption(); + if (offset < 0) { + if (crypto == null) + os.write(bytes); + else { + crypto.prepareKey(); + byte buf[] = new byte[length]; + System.arraycopy(bytes, 0, buf, 0, length); + crypto.encryptRC4(buf); + os.write(buf); + } + } + else { + byte buf[] = new byte[Math.min(length, 4092)]; + RandomAccessFileOrArray file = writer.getReaderFile(reader); + boolean isOpen = file.isOpen(); + try { + file.seek(offset); + int size = length; + + //added by ujihara for decryption + PdfEncryption decrypt = reader.getDecrypt(); + if (decrypt != null) { + decrypt.setHashKey(objNum, objGen); + decrypt.prepareKey(); + } + + if (crypto != null) + crypto.prepareKey(); + while (size > 0) { + int r = file.read(buf, 0, Math.min(size, buf.length)); + size -= r; + + if (decrypt != null) + decrypt.encryptRC4(buf, 0, r); //added by ujihara for decryption + + if (crypto != null) + crypto.encryptRC4(buf, 0, r); + os.write(buf, 0, r); + } + } + finally { + if (!isOpen) + try{file.close();}catch(Exception e){} + } + } + } + os.write(ENDSTREAM); + } +} \ No newline at end of file -- cgit v1.2.3