[Poppler-bugs] [Bug 16770] support for digital signatures

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=16770

--- Comment #26 from Andre Guerreiro <aguerreiro1985 at gmail.com> 2012-09-10 09:41:39 UTC ---
What's missing in gnutls is a way to parse all the relevant components of the
PKCS#7 object as present in a PDF signature.

It seems that in gnutls they assume those objects can only contain certificates
and CRLs as you can confirm if you go through the functions that take
gnutls_pkcs7_t as argument.

With openssl you can get the certificates, signature, and the digest of the
signed content (these are the essential parts for detached signatures as used
in PDF) as well as any optional timestamps or CRLs.

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