Hi,
I am using iText 1.4.8 and try to sign PDFs with external generated
signatures.
Up till know it works fine (using different SmartCards with 1024-bit key
lenght). Today I tried a new card with 2048-bit RSA key and I get a problem
when I try to copy the generated bytes into the PdfDictinary.
The generated Data is to much (I think because of the 2048-bit key).
I used the iText code example for inserting external signatures.
Anyone a suggestion what to do to fix it? (with a SmartCard with a 1024-bit
key everything works fine...).
In the following you will find the code where occures the problem.
Thanks for your help.
Best regards,
rene
--------------------------------------
PdfSigGenericPKCS sg = sap.getSigStandard();
PdfLiteral slit = (PdfLiteral) sg.get(PdfName.CONTENTS);
byte[] outc = new byte[(slit.getPosLength() - 2) / 2];
PdfPKCS7 sig = sg.getSigner();
/*
create hash and signature...
*/
// Sets the generated signature and hash of the PDF part(!!!)
sig.setExternalDigest(job.getSignatur(), hash, "RSA"); //$NON-NLS-1$
// Creates the signedData-object and adds it into the temporary
// PDF file.
PdfDictionary dic = new PdfDictionary();
byte[] ssig = sig.getEncodedPKCS7();
System.arraycopy(ssig, 0, outc, 0, ssig.length); //sysout:
PDF.Signatur.ssig: 3081 bytes, outc: 3014 bytes
dic.put(PdfName.CONTENTS, new PdfString(outc)
.setHexWriting(true));
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