PdfReader reader = new PdfReader("/STORE/F16.pdf");
FileOutputStream fout = new FileOutputStream("/STORE/F16-signed.pdf");
PdfStamper stp = PdfStamper.createSignature(reader, fout, '\0');
stp.setEncryption(...);
PdfSignatureAppearance sap = stp.getSignatureAppearance();
sap.setCrypto(key, chain, null,
PdfSignatureAppearance.WINCER_SIGNED);
Paulo
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> Sent: Tuesday, July 07, 2009 4:30 PM
> To: [email protected]
> Subject: [iText-questions] PDF Protection and Signing with iText
>
> Hello Friends,
>
> I'm stuck at an issue with my code. I want to protect a PDF(
> User is Allowed to print only) and then Sign it. When tried
> to do so, i got an exception
> "com.lowagie.text.DocumentException: The original document
> was reused. Read it again from file."
>
>
> My code is some thing like below
>
> PdfReader reader = new PdfReader("/STORE/F16.pdf");
> FileOutputStream fout = new FileOutputStream("/STORE/F16-signed.pdf");
> PdfEncryptor.encrypt(reader,
> fout,
> null,
> null,PdfWriter.AllowPrinting ,PdfWriter.STRENGTH128BITS);
> PdfReader readerCpy = new PdfReader("/STORE/F16-signed.pdf");
> PdfStamper stp = PdfStamper.createSignature(readerCpy, fout, '\0');
> PdfSignatureAppearance sap = stp.getSignatureAppearance();
> sap.setCrypto(key, chain, null,
> PdfSignatureAppearance.WINCER_SIGNED);
>
>
>
> So, I made another try, by introducing a temporary file in between.
>
> ..............................................................
> .................
> PdfReader reader = new PdfReader("/STORE/F16.pdf");
> FileOutputStream fout = new
> FileOutputStream("/STORE/F16-signed_temp.pdf");
> PdfEncryptor.encrypt(reader,
> fout,
> null,
> null,PdfWriter.AllowPrinting ,PdfWriter.STRENGTH128BITS);
>
> fout.close();
> reader.close();
> PdfReader readerCpy = new PdfReader("/STORE/F16-signed_temp.pdf");
> FileOutputStream fout = new FileOutputStream("/STORE/F16-signed.pdf");
> PdfStamper stp = PdfStamper.createSignature(readerCpy, fout, '\0');
> PdfSignatureAppearance sap = stp.getSignatureAppearance();
> sap.setCrypto(key, chain, null,
> PdfSignatureAppearance.WINCER_SIGNED);
>
>
> But in this attempt, while reading the encrypted file , I
> lost the encryption properties which I want to preserve
> before signing.
>
> Please guide me to solve this issue, i'm facing this issue
> with iText-1.3.1 and iText-2.1.4
> Regards,
> Santhosh
>
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