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https://issues.apache.org/jira/browse/PDFBOX-1614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14500560#comment-14500560
]
Khurram Mahmood commented on PDFBOX-1614:
-----------------------------------------
This is still an issue in PDFBox 2.0 release. The saveIncremental method in
PDDocument class is the culprit as it clearly assumes that the input is a file.
See below -
{code:title=PDDocument.java|borderStyle=solid}
public void saveIncremental(OutputStream output) throws IOException
{
InputStream input = new
RandomAccessBufferedFileInputStream(incrementalFile);
COSWriter writer = null;
try
{
writer = new COSWriter(output, input);
writer.write(this, signInterface);
writer.close();
}
finally
{
if (writer != null)
{
writer.close();
}
}
}
{code}
> Digitally sign PDFs without file system access
> ----------------------------------------------
>
> Key: PDFBOX-1614
> URL: https://issues.apache.org/jira/browse/PDFBOX-1614
> Project: PDFBox
> Issue Type: Improvement
> Components: Signing
> Affects Versions: 1.8.1
> Reporter: Thierry Boschat
> Assignee: Thomas Chojecki
>
> Hi I'm using pdfbox-1.8.1 to digitally sign PDFs.
> I find the sample below to handle it.
> But in this example I have to use a FileInputStream however I want to do it
> only through streams (without any file system access). I tried to extends
> FileInputStream to deal with it but I failed. Any tips for me about that
> problem ?
> Thanks.
> File outputDocument = new File("resources/signed" + document.getName());
> FileInputStream fis = new FileInputStream(document);
> FileOutputStream fos = new FileOutputStream(outputDocument);
> int c;
> while ((c = fis.read(buffer)) != -1)
> {
> fos.write(buffer, 0, c);
> }
> fis.close();
> fis = new FileInputStream(outputDocument);
> // load document
> PDDocument doc = PDDocument.load(document);
> // create signature dictionary
> PDSignature signature = new PDSignature();
> signature.setFilter(PDSignature.FILTER_ADOBE_PPKLITE); // default filter
> // subfilter for basic and PAdES Part 2 signatures
> signature.setSubFilter(PDSignature.SUBFILTER_ADBE_PKCS7_DETACHED);
> signature.setName("signer name");
> signature.setLocation("signer location");
> signature.setReason("reason for signature");
> // the signing date, needed for valid signature
> signature.setSignDate(Calendar.getInstance());
> // register signature dictionary and sign interface
> doc.addSignature(signature, this);
> // write incremental (only for signing purpose)
> doc.saveIncremental(fis, fos);
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