Make rand_add predictable when fuzzing

Reviewed-by: Rich Salz <rsalz@openssl.org>
GH: #2182

diff --git a/crypto/rand/md_rand.c b/crypto/rand/md_rand.c
index 88820bbb917674e18644d308d862c6ec30d612e2..78da14a8e602717a60792d777bf2aab2f6d18f6a 100644 (file)
--- a/crypto/rand/md_rand.c
+++ b/crypto/rand/md_rand.c
@@ -126,6 +126,11 @@ static int rand_add(const void *buf, int num, double add)
     if (!num)
         return 1;
 
+#ifdef PREDICT
+    if (rand_predictable)
+        return 1;
+#endif
+
     /*
      * (Based on the rand(3) manpage)
      *