diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PRStream.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PRStream.java | 229 |
1 files changed, 229 insertions, 0 deletions
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);
+ }
+}
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