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https://issues.apache.org/jira/browse/PDFBOX-4312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16620995#comment-16620995
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Tilman Hausherr edited comment on PDFBOX-4312 at 9/20/18 4:05 AM:
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So I was able to reproduce the effect, see attached files. This 1.8 source code
{code:java}
    public void saveIncremental( String fileName ) throws IOException, 
COSVisitorException
    {
        saveIncremental(new BufferedInputStream(new FileInputStream(fileName)), 
                new BufferedOutputStream(new FileOutputStream(fileName, true)));
    }
{code}
is suspicious, because one is writing on the same file than the one where one 
is writing, but I'm not sure if the writing start offset is really correct.


was (Author: tilman):
So I was able to reproduce the effect, see attached files. This code
{code:java}
    public void saveIncremental( String fileName ) throws IOException, 
COSVisitorException
    {
        saveIncremental(new BufferedInputStream(new FileInputStream(fileName)), 
                new BufferedOutputStream(new FileOutputStream(fileName, true)));
    }
{code}
is suspicious, because one is writing on the same file than the one where one 
is writing, but I'm not sure if the writing start offset is really correct.

> Signature is not getting inserted into 00000 area
> -------------------------------------------------
>
>                 Key: PDFBOX-4312
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4312
>             Project: PDFBox
>          Issue Type: Bug
>          Components: .NET, PDModel, Signing
>    Affects Versions: 1.8.9
>            Reporter: bal
>            Priority: Major
>         Attachments: Screenshot (30).png, Screenshot (31).png, Screenshot 
> (31).png, testingSignature-signed-SaveIncremental-1param-bad-cutoff.pdf, 
> testingSignature-signed-SaveIncremental-2param-good.pdf, 
> testingSignature.pdf, testingSignature.pdf
>
>
> Hi ,
> I want to sign pdf using signature in pkcs 7 format . I am converting pkcs 7 
> signature to byte array using Convert.FromBase64String method in .net . I am 
> passing this byte array to sign method in signature interface which gets 
> called after calling saveincremental. My byte array is inserting proper but 
> the name of which signature is not shown when i open pdf. May be my byte 
> conversion may not proper or something else i am doing wrong. please let me 
> know.



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