gpg --verify detached signature from two file descriptors?

[Robert J. Hansen]

On 11/11/2010 11:19 PM, Daniel Kahn Gillmor wrote:
> i'd like to use gpg to verify a detached signature, but for various
> reasons i don't want to put either part (the body or the signature) in
> the filesystem (i have the data queued in two otherwise anonymous file
> descriptors).

This may be more hammer for your task than you really need, but I would
consider making a memory-mapped file object.  Read the data from the two
anonymous FDs, concat them into the memory-mapped file object, and pipe
those contents to GnuPG.

(Note that most people use MMFOs to populate memory blocks with file
contents, but there's no requirement it correspond to a physical file on
disk: anonymous FDs should work.  Also note that I haven't done POSIX
memory mapped files in quite some time: my recollections may be off.)

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