Hello,
i am currently working on a Proof-of-Concept to expose the encryption
functionality of iText as a web service for external consumption. As this
Web Service is supposed to run on a SAP Netweaver Application Server 7.0
which is still based on Java 1.4.2 i cant use the latest iText release :( -
i am using iText 2.1.7.
What i have done so far is, i have wrapped an EJB around the iText Libs and
exposed the encryption function as a web service. The code to encrypt a pdf
is:
/import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
import com.lowagie.text.pdf.PdfWriter;
....
public byte[] encrypt(byte[] pdf, byte[] pwd) {
// TODO : Implement
try {
PdfReader reader = new PdfReader(pdf);
ByteArrayOutputStream boas = new
ByteArrayOutputStream();
try {
PdfStamper stamper = new PdfStamper(reader,
boas);
stamper.setEncryption(pwd, pwd,
PdfWriter.ALLOW_PRINTING,
PdfWriter.ENCRYPTION_AES_128 |
PdfWriter.DO_NOT_ENCRYPT_METADATA);
stamper.close();
return boas.toByteArray();
} catch (DocumentException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}/
Unfortunatelly this code doesnt encrypt the pdf at all. The returning pdf
stream has no pwd set at all.
Has anyone an idea what could be wrong with this code? Or is there an issue
with the encryption function of the iText release 2.1.7?
When i do the same on a newer release of the SAP Netweaver Application
Server (Version 7.3) - which got released recently (its Java 1.6 based) and
the latest iText release with the following code to encrypt it does work
just fine!
/import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
....
public byte[] encryptPDF(byte[] pdf, byte[] pwd) {
try {
PdfReader reader = new PdfReader(pdf);
ByteArrayOutputStream boas = new
ByteArrayOutputStream();
try {
PdfStamper stamper = new PdfStamper(reader,
boas);
stamper.setEncryption(pwd, pwd,
PdfWriter.ALLOW_PRINTING,
PdfWriter.ENCRYPTION_AES_128 |
PdfWriter.DO_NOT_ENCRYPT_METADATA);
stamper.close();
return boas.toByteArray();
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}/
--
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