skalibs/src/librandom/random_buf_early.c, branch v2.12.0.1The skarnet.org C programming libraryhttps://git.skarnet.org/cgit/skalibs/atom/src/librandom/random_buf_early.c?h=v2.12.0.12022-06-23T08:46:40Z Add runtime fallback for GRND_INSECURE2022-06-23T08:46:40ZLaurent Bercotska-skaware@skarnet.org2022-06-23T08:46:40Zurn:sha1:664f0f3af7eb8aef89e6b1adee2d83b4c4f4cf9f
The grndinsecure sysdep is only build-time tested and returns yes
if the kernel headers declare GRND_INSECURE. That is a problem
because the kernel headers are most likely provided by the toolchain
and do not reflect the exact capabilities of the run-time kernel.
If the run-time kernel doesn't support that option, getrandom()
fails. That made random_buf_early() busyloop.
To avoid that, we now fallback to random_devurandom() as an
implementation of random_buf_early() if getrandom() fails when
used with GRND_INSECURE. This adds a slight amount of overhead
to random_buf_early(), so it's probably better to just disable
the sysdep at build time if you're making binaries that will run
on older kernels.
Signed-off-by: Laurent Bercot <ska@appnovation.com>
Export random_devurandom, fix APIs2022-06-08T17:33:25ZLaurent Bercotska-skaware@skarnet.org2022-06-08T17:33:25Zurn:sha1:8ed4778c0eb0515d2b45a5add017bb96106ee543
Signed-off-by: Laurent Bercot <ska@appnovation.com>
Prepare for 2.12.0.0. librandom revamp.2022-04-09T02:28:05ZLaurent Bercotska-skaware@skarnet.org2022-04-09T02:28:05Zurn:sha1:4e75b40d8a96c5d51490ddea43566fe8e6d4168c
Signed-off-by: Laurent Bercot <ska@appnovation.com>