Re: [PATCH v2 06/17] cli/show: add information about which headers were protected

Subject: Re: [PATCH v2 06/17] cli/show: add information about which headers were protected

Date: Mon, 27 May 2019 07:12:52 -0300

To: Daniel Kahn Gillmor, Notmuch Mail

Cc:

From: David Bremner


Daniel Kahn Gillmor <dkg@fifthhorseman.net> writes:

> The header-mask member of the per-message crypto object allows a
> clever UI frontend to mark whether a header was protected (or not).
> And if it was protected, it contains enough information to show useful
> detail to an interested user.  For example, an MUA could offer a "show
> what this message's Subject looked like on the wire" feature in expert
> mode.
>
> As before, we only handle Subject for now, but we might be able to
> handle other headers in the future.
>
> Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
> ---
>  devel/schemata                 |  6 ++++++
>  notmuch-show.c                 | 21 +++++++++++++++++++++
>  test/T356-protected-headers.sh |  4 ++--
>  3 files changed, 29 insertions(+), 2 deletions(-)
>
> diff --git a/devel/schemata b/devel/schemata
> index 72feb7b7..9d3c8d30 100644
> --- a/devel/schemata
> +++ b/devel/schemata
> @@ -88,9 +88,15 @@ crypto = {
>                    status:      sigstatus,
>                    # was the set of signatures described under encrypted cover?
>                    encrypted:   bool,
> +                  # which of the headers is covered by sigstatus?
> +                  headers:     [header_name*]
>                  },
>      decrypted?: {
>                    status: msgdecstatus,
> +                  # map encrypted headers that differed from the outside headers.
> +                  # the value of each item in the map is what that field showed externally
> +                  # (maybe null if it was not present in the external headers).
> +                  header-mask:  { header_name: string|null,*}
>                  }

I think you also need to add a definition for header_name to schemata
(in the same way that messageid is defined as a string).

The name "header-mask" is a bit generic, but I don't have my head in
this topic like you do. I was thinking of something like
"replaced-headers", but it's only a mild suggestion.

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