Tilman Hausherr created PDFBOX-5381:
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Summary: Catalog object twice in signed file
Key: PDFBOX-5381
URL: https://issues.apache.org/jira/browse/PDFBOX-5381
Project: PDFBox
Issue Type: Bug
Components: Signing
Affects Versions: 3.0.0 PDFBox
Reporter: Tilman Hausherr
Fix For: 3.0.0 PDFBox
Attachments: PDFA_signed.pdf
The catalog object is twice in the signed file
{noformat}
1 0 obj
<<
/Type /Catalog
/Version /1.4
/Pages 2 0 R
/Metadata 3 0 R
/OutputIntents [4 0 R]
/Perms 18 0 R
/AcroForm <<
/Fields [22 0 R]
/SigFlags 3
>>
>>
endobj
1 0 obj
<<
/Type /Catalog
/Version /1.4
/Pages 2 0 R
/Metadata 3 0 R
/OutputIntents [4 0 R]
/Perms 18 0 R
/AcroForm <<
/Fields [22 0 R]
/SigFlags 3
>>
>>
endobj
{noformat}
here's a failing test, to be added at the end of CreatePDFATest.java (and
probably elsewhere)
{code}
// Check that no object numbers are double
File signedFile = new File(signedPdfaFilename);
BufferedReader br = new BufferedReader(new InputStreamReader(new
FileInputStream(signedFile)));
String line;
boolean isIncrementalArea = false;
Set<String> set = new HashSet<>();
int linePos = 0;
while ((line = br.readLine()) != null)
{
++linePos;
if (line.equals("%%EOF"))
{
isIncrementalArea = true;
}
if (!isIncrementalArea)
continue;
if (line.matches("^\\d+ 0 obj$"))
{
int pos = line.indexOf(" 0 obj");
line = line.substring(0, pos);
assertFalse(set.contains(line), "object '" + line + " 0 obj' twice in
incremental part of PDF at line " +linePos);
set.add(line);
}
}
br.close();
{code}
I don't know why it happens (although I remember I had such a thing years ago
when trying different strategies while working on incremental saving in
PDFBOX-45)
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