xmlsecurity: implement removal of a signature in pdfverify

It's not exactly clear how one should guess what was file end before
signing, for now assume the followings:

- the file ended with a %%EOF, an optional \r, and a \n
- the number of incremental updates is the same as the number of
  signatures

When the later is not the case, don't attempt to remove the signature.

Change-Id: I203a7b0605fc061ec6aacfde3a8eedc4736379f2
Reviewed-on: https://gerrit.libreoffice.org/30140
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

0 files changed, 0 insertions, 0 deletions