Hossam Hazem created PDFBOX-3971:
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Summary: Add Certificate Dictionary to seed value in signature
field
Key: PDFBOX-3971
URL: https://issues.apache.org/jira/browse/PDFBOX-3971
Project: PDFBox
Issue Type: Improvement
Components: Signing
Reporter: Hossam Hazem
Attachments: COSName.patch, PDSeedValue.patch,
PDSeedValueCertificate.java
This dictionary is important as it gives the ability to put certificate
constraints on a signature field, like if you want signatures that are signed
by a specific issuer or authority to only be used in a field.
currently tested Issuer constraint and it worked, acrobat reader ignores other
certificates and only allow the issuer given to sign the field. documentation
is not complete waiting for the initial acceptance to complete.
new class PDSeedValueCertificate is added which refers to this certificate.
PDSeedValue is modified to add the new dictionary.
COSName is modified to add the new pdf names that are included in the
dictionary.
reference for this dictionary can be found in PDF reference 1.7 section
12.7.4.5 table 235 page 457 in here
http://www.adobe.com/content/dam/acom/en/devnet/pdf/PDF32000_2008.pdf
or chapter 8 table 8.84 page 700 in here
http://archimedespalimpsest.net/Documents/External/pdf_reference_1-7.pdf
and in here
https://www.adobe.com/devnet-docs/acrobatetk/tools/DigSig/Acrobat_DigitalSignatures_in_PDF.pdf
this is my first contribution, hope everything goes well.
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