Switch from ossl_rand to DRBG rand

If RAND_add wraps around, XOR with existing. Add test to drbgtest that
does the wrap-around.

Re-order seeding and stop after first success.

Add RAND_poll_ex()

Use the DF and therefore lower RANDOMNESS_NEEDED.  Also, for child DRBG's,
mix in the address as the personalization bits.

Centralize the entropy callbacks, from drbg_lib to rand_lib.
(Conceptually, entropy is part of the enclosing application.)
Thanks to Dr. Matthias St Pierre for the suggestion.

Various code cleanups:
    -Make state an enum; inline RANDerr calls.
    -Add RAND_POLL_RETRIES (thanks Pauli for the idea)
    -Remove most RAND_seed calls from rest of library
    -Rename DRBG_CTX to RAND_DRBG, etc.
    -Move some code from drbg_lib to drbg_rand; drbg_lib is now only the
     implementation of NIST DRBG.
    -Remove blocklength

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/4019)

1 files changed, 0 insertions, 3 deletions

diff --git a/test/bntest.c b/test/bntest.c
index a570d0099b..4dae6601c2 100644
--- a/test/bntest.c
+++ b/test/bntest.c
@@ -2035,11 +2035,8 @@ static int run_file_tests(int i)
 
 int setup_tests(void)
 {
-    static const char rnd_seed[] =
-        "If not seeded, BN_generate_prime might fail";
     int n = test_get_argument_count();
 
-    RAND_seed(rnd_seed, sizeof(rnd_seed));
     if (!TEST_ptr(ctx = BN_CTX_new()))
         return 0;