OpenSystemsDevelopment / qpdf

Commit 06c5bac96c9d18d8336a65e2ad6f8283530514c2

Authored by Jay Berkenbilt
1 parent f8306913

Clarify TODO note about crypt filters

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Showing 1 changed file with 8 additions and 7 deletions
... ... @@ -79,13 +79,14 @@ Index: QPDFWriter.cc
79 79 * The description of Crypt filters is unclear with respect to how to
80 80 use them to override /StmF for specific streams. I'm not sure
81 81 whether qpdf will do the right thing for any specific individual
82   - streams that might have crypt filters. The specification seems to
83   - imply that only embedded file streams and metadata streams can have
84   - crypt filters, and there are already special cases in the code to
85   - handle those. Most likely, it won't be a problem, but someday
86   - someone may find a file that qpdf doesn't work on because of crypt
87   - filters. There is an example in the spec of using a crypt filter
88   - on a metadata stream.
  82 + streams that might have crypt filters, but I believe it does based
  83 + on my testing of a limited subset. The specification seems to imply
  84 + that only embedded file streams and metadata streams can have crypt
  85 + filters, and there are already special cases in the code to handle
  86 + those. Most likely, it won't be a problem, but someday someone may
  87 + find a file that qpdf doesn't work on because of crypt filters.
  88 + There is an example in the spec of using a crypt filter on a
  89 + metadata stream.
89 90  
90 91 For now, we notice /Crypt filters and decode parameters consistent
91 92 with the example in the PDF specification, and the right thing
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