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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