Handle PKCS#7 signedData (S/MIME single-part clearsigned)

[Jameson Graef Rollins]

On Mon, Dec 09 2019, William Casarin <jb55 at jb55.com> wrote:
> Daniel Kahn Gillmor <dkg at fifthhorseman.net> writes:
>> Several of the patches should be simple to read and uncontroversial (I
>> hope!), and I welcome/encourage merging of those patches to reduce the
>> length of the remaining series.
>
> I did a quick skim and it looks ok, although I'm not super familiar with
> S/MIME. Any steps toward S/MIME support gets a Concept ACK from me!

+1 on this.  Anything that pushes better crypto support is always good.
I gave the series a casual once over and it looks good to me, but I
haven't done an in-depth code review.

jamie.