Switch for turning on the predictable "random" number generator.

crypto/rand/md_rand.c

@@ -130,6 +130,10 @@
 
 #include <openssl/rand.h>
 
+#ifdef BN_DEBUG
+# define PREDICT
+#endif
+
 /* #define NORAND	1 */
 /* #define PREDICT	1 */
 
@@ -141,6 +145,10 @@ static long md_count[2]={0,0};
 static double entropy=0;
 static int initialized=0;
 
+#ifdef PREDICT
+int rand_predictable=0;
+#endif
+
 const char *RAND_version="RAND" OPENSSL_VERSION_PTEXT;
 
 static void ssleay_rand_cleanup(void);
@@ -306,6 +314,10 @@ static void ssleay_rand_initialize(void)
 	FILE *fh;
 #endif
 
+#ifdef NORAND
+	return;
+#endif
+
 	CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
 	/* put in some default random data, we need more than just this */
 #ifndef GETPID_IS_MEANINGLESS
@@ -354,6 +366,7 @@ static int ssleay_rand_bytes(unsigned char *buf, int num)
 #endif
 
 #ifdef PREDICT
+	if (rand_predictable)
 		{
 		static unsigned char val=0;