Please check whether that stream already is broken in your source PDF.
Adobe acrobat reader crashing pdf#
PDF viewers may fail if encountering such missing data (though it is impressive how Adobe Reader locks up for some time.). This Image XObject claims to contain an RGB bitmap image (736x1242, 24bit) and at the same time is empty ( Length 0). Your PDF contains a broken image: 16 0 obj The question, then, is why does this digitally signed PDF crash Adobe Reader and how can we remedy it?
I mention them because they may be relevant. Sometimes an error box will come up after a while that says something like "There was an error opening the stream."Īdditionally of interest, on PDFs that have gone through this same digital signature process, we have observed the following in the Appearance Integrity ReportĪt the moment we are unsure if these are related to the problem. Browser PDF viewers and Foxit Reader (which does signature verification) handle it just fine. This issue does not seem to be happening consistently, and the problem only exists in Adobe Reader. Whether or not you have our certificates to verify this signature installed, the issue seems to occur. The PDF will open initially but then freeze and not be navigable. Here is a sample PDF which exhibits the issue. Return new MemoryStream(memoryStream.ToArray()) SignatureAppearance.SetCrypto(privateKey, signingCertificates, null, PdfSignatureAppearance.WINCER_SIGNED) Var privateKey = certificationBundle.PrivateKey SignatureAppearance.Reason = "Approval of design" Var signatureAppearance = signatureStamper.SignatureAppearance SignatureStamper.SetEncryption(null, (certificationBundle.Password), PdfWriter.ALLOW_PRINTING | PdfWriter.ALLOW_MODIFY_ANNOTATIONS, PdfWriter.STANDARD_ENCRYPTION_128) Var signatureStamper = PdfStamper.CreateSignature(pdfReader, memoryStream, '\0', null) Var pdfReader = new PdfReader(uncertifiedFileStream) Using (var memoryStream = new MemoryStream()) public static Stream Digitall圜ertifyPdfStream(Stream uncertifiedFileStream, CertificationBundle certificationBundle) We use the LGPL version of the iTextSharp library (4.1.6) for digitally signing the PDFs.
Adobe acrobat reader crashing code#
We have code that modifies a PDF and then digitally signs the modified PDF.
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