* src/genrandom.c (getrandom_size_t): New.
(gpgme_op_random_value): New.
* src/gpgme.def: Add new function.
* src/libgpgme.vers: Ditto.
* src/gpgme.h.in: Add prototype.
* tests/run-genrandom.c: Add an option to use the new function.
--
The implementation is not optimized but sufficient for our use case.
Possible improvements for this and gpgme_op_random_bytes are a cache
for random bytes in the context so that we do not need to get out to
gpgme for just a few random bytes.
GnuPG-bug-id: 6694
* src/genrandom.c: New.
* src/Makefile.am: Add new file.
* src/engine-backend.h (struct engine_ops): Add func ptr getdirect.
Adjust all engine_ops.
* src/engine-gpg.c (gpg_getdirect): New.
(_gpgme_engine_ops_gpg): Connect new handler.
* src/gpgme.h.in (gpgme_random_mode_t): New.
(GPGME_RANDOM_MODE_NORMAL): New.
(GPGME_RANDOM_MODE_ZBASE32): New.
(gpgme_op_random_bytes): New public function
* src/libgpgme.vers: Add function.
* src/gpgme.def: Add function.
* tests/run-genrandom.c: New.
* tests/Makefile.am: Add new file.
--
This is a first take on this the mode parameter allows to extend the
function if ever needed. Due to the gpg calling and fd setup overhead
this function is not yet very fast but its purpose is to get
"approved" random bytes. We might eventually extend it to keep a
small internal cache of random numbers and get for example 128 random
bytes directly from gpg and deliver only the few required.
GnuPG-bug-id: 6694
