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, 2 deletions

diff --git a/ssl/statem/statem.c b/ssl/statem/statem.c
index e5a50c4..4f259fd 100644
--- a/ssl/statem/statem.c
+++ b/ssl/statem/statem.c
@@ -272,7 +272,6 @@ static info_cb get_callback(SSL *s)
 static int state_machine(SSL *s, int server)
 {
     BUF_MEM *buf = NULL;
-    unsigned long Time = (unsigned long)time(NULL);
     void (*cb) (const SSL *ssl, int type, int val) = NULL;
     OSSL_STATEM *st = &s->statem;
     int ret = -1;
@@ -283,7 +282,6 @@ static int state_machine(SSL *s, int server)
         return -1;
     }
 
-    RAND_add(&Time, sizeof(Time), 0);
     ERR_clear_error();
     clear_sys_error();