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/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2020 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.pdf;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
/**
* Extends PdfStream and should be used to create Streams for Embedded Files
* (file attachments).
* @since 2.1.3
*/
public class PdfEFStream extends PdfStream {
/**
* Creates a Stream object using an InputStream and a PdfWriter object
* @param in the InputStream that will be read to get the Stream object
* @param writer the writer to which the stream will be added
*/
public PdfEFStream(InputStream in, PdfWriter writer) {
super(in, writer);
}
/**
* Creates a Stream object using a byte array
* @param fileStore the bytes for the stream
*/
public PdfEFStream(byte[] fileStore) {
super(fileStore);
}
/**
* @see com.itextpdf.text.pdf.PdfDictionary#toPdf(com.itextpdf.text.pdf.PdfWriter, java.io.OutputStream)
*/
public void toPdf(PdfWriter writer, OutputStream os) throws IOException {
if (inputStream != null && compressed)
put(PdfName.FILTER, PdfName.FLATEDECODE);
PdfEncryption crypto = null;
if (writer != null)
crypto = writer.getEncryption();
if (crypto != null) {
PdfObject filter = get(PdfName.FILTER);
if (filter != null) {
if (PdfName.CRYPT.equals(filter))
crypto = null;
else if (filter.isArray()) {
PdfArray a = (PdfArray)filter;
if (!a.isEmpty() && PdfName.CRYPT.equals(a.getPdfObject(0)))
crypto = null;
}
}
}
if (crypto != null && crypto.isEmbeddedFilesOnly()) {
PdfArray filter = new PdfArray();
PdfArray decodeparms = new PdfArray();
PdfDictionary crypt = new PdfDictionary();
crypt.put(PdfName.NAME, PdfName.STDCF);
filter.add(PdfName.CRYPT);
decodeparms.add(crypt);
if (compressed) {
filter.add(PdfName.FLATEDECODE);
decodeparms.add(new PdfNull());
}
put(PdfName.FILTER, filter);
put(PdfName.DECODEPARMS, decodeparms);
}
PdfObject nn = get(PdfName.LENGTH);
if (crypto != null && nn != null && nn.isNumber()) {
int sz = ((PdfNumber)nn).intValue();
put(PdfName.LENGTH, new PdfNumber(crypto.calculateStreamSize(sz)));
superToPdf(writer, os);
put(PdfName.LENGTH, nn);
}
else
superToPdf(writer, os);
os.write(STARTSTREAM);
if (inputStream != null) {
rawLength = 0;
DeflaterOutputStream def = null;
OutputStreamCounter osc = new OutputStreamCounter(os);
OutputStreamEncryption ose = null;
OutputStream fout = osc;
if (crypto != null)
fout = ose = crypto.getEncryptionStream(fout);
Deflater deflater = null;
if (compressed) {
deflater = new Deflater(compressionLevel);
fout = def = new DeflaterOutputStream(fout, deflater, 0x8000);
}
byte buf[] = new byte[4192];
while (true) {
int n = inputStream.read(buf);
if (n <= 0)
break;
fout.write(buf, 0, n);
rawLength += n;
}
if (def != null) {
def.finish();
deflater.end();
}
if (ose != null)
ose.finish();
inputStreamLength = (int)osc.getCounter();
}
else {
if (crypto == null) {
if (streamBytes != null)
streamBytes.writeTo(os);
else
os.write(bytes);
}
else {
byte b[];
if (streamBytes != null) {
b = crypto.encryptByteArray(streamBytes.toByteArray());
}
else {
b = crypto.encryptByteArray(bytes);
}
os.write(b);
}
}
os.write(ENDSTREAM);
}
}
