Add API gpgme_op_random_bytes.

* 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

1 files changed, 6 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 4505b57c..481da3a0 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,9 @@
 Noteworthy changes in version 2.0.0 (unreleased)
 ------------------------------------------------
 
+ * New function gpgme_op_random_bytes to get cryptographically strng
+   random bytes from gpg.
+
  * Removed the gpgme_attr_t enums and their functions which were
    deprecated since 2003.  [rMd54d6eaa64]
 
@@ -12,6 +15,9 @@ Noteworthy changes in version 2.0.0 (unreleased)
 
  * Interface changes relative to the 1.24 branch:
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ gpgme_op_random_bytes                   NEW.
+ GPGME_RANDOM_MODE_NORMAL                NEW.
+ GPGME_RANDOM_MODE_ZBASE32               NEW.
  gpgme_attr_t                            REMOVED.
  gpgme_get_sig_ulong_attr                REMOVED.
  gpgme_get_sig_string_attr               REMOVED.