Hello List! One more question for this topic: Am I right that secret key export is not really implemented, even though there is the GPGME_EXPORT_MODE_SECRET flag to gpgme_op_export_keys()?
If this is correct: Why is there such a flag? sincerely peter Am 17/07/17 um 13:25 schrieb gnupg-u...@niob.at: > Am 12.07.2017 um 01:55 schrieb Daniel Kahn Gillmor: >> On Fri 2017-07-07 18:01:03 +0200, gnupg-u...@niob.at wrote: >>> I am looking for a "simple" way to use a GPG public/private RSA key to >>> do "raw" RSA operations. I have the impression, that gpgme only deals >>> with "real" OpenPGP data structures, but this does not fit my use case. >>> This is for an application that is currently based on openssl crypto. >> you're right -- gpgm is only for higher-level protocol operations, >> whether they're OpenPGP or CMS (cryptographic message syntax). it >> doesn't offer low-level crypto primitives. >> >> if you want low-level crypto primitives that are GPL-compatible, you can >> use libhogweed (from the nettle project) or libgcrypt. > Thanks a lot for the answer. So the next question is: How? That is: I > could not find any libgcrypt functions taking a gpg key obtainable > through gpgme. > > But that is the key problem (haha): I *could* (by hand) parse a secret > key exported using gpg (or, if possible, through gpgme) and use the RSA > parameters to build up the key structure required for either libgcrypt > (or openssl). But that would make it impossible to deal with e.g. gpg > agents. > > So to rephrase the question: How would I proceed to do raw RSA > operations using libcrypt for gpg keys stored in a standard key ring? Or > is this functionality not exposed directly in any library? Would it be > best to look at how gpg itself does this? Any pointers (source files, > docs, examples, etc.?) > >> Modern GnuPG uses libgcrypt for its crypto primitives, fwiw. > I want to be modern as well... :-) >> --dkg > peter > > _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
