tree 84b36af5f4cd466735127cae2c0fc9075988d430
parent 8fe1584023006c844816dbf63fb776b7f84b88b3
author Pete Bentley <prb@google.com> 1570459278 +0100
committer Adam Langley <agl@google.com> 1570650377 +0000

Enable optional GRND_RANDOM flag to be passed to getrandom on Android.

Introduces optional extra flags for getrandom which are ORed in when
reading a FIPS seed.  Setting the Android read-only system property
ro.boringcrypto.hwrand to true will set the extra flags to GRND_RANDOM.

Testing: Built and tested on AOSP as http://r.android.com/1134926
and verified behaviour via the extra printfs in that CL and also
observing the flags passed to getrandom using strace.

Change-Id: Idd782df65ba0d49b8b1357b346caa4ef747587f1
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/38024
Reviewed-by: David Benjamin <davidben@google.com>