From e64dceab743f0c2f4aef5dbc2b0e479c07bd2049 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ulf=20M=C3=B6ller?= <ulf@openssl.org>
Date: Mon, 28 Feb 2000 20:19:39 +0000
Subject: [PATCH] Switch for turning on the predictable "random" number
 generator.

---
 crypto/rand/md_rand.c  | 25 +++++++++++++++++++------
 crypto/rand/rand_egd.c |  2 +-
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/crypto/rand/md_rand.c b/crypto/rand/md_rand.c
index 6b158f0349..583fc137d8 100644
--- a/crypto/rand/md_rand.c
+++ b/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
@@ -354,13 +366,14 @@ static int ssleay_rand_bytes(unsigned char *buf, int num)
 #endif
 
 #ifdef PREDICT
-	{
-	static unsigned char val=0;
+	if (rand_predictable)
+		{
+		static unsigned char val=0;
 
-	for (i=0; i<num; i++)
-		buf[i]=val++;
-	return(1);
-	}
+		for (i=0; i<num; i++)
+			buf[i]=val++;
+		return(1);
+		}
 #endif
 
 	/*
diff --git a/crypto/rand/rand_egd.c b/crypto/rand/rand_egd.c
index d834408bd4..380c7828c3 100644
--- a/crypto/rand/rand_egd.c
+++ b/crypto/rand/rand_egd.c
@@ -97,7 +97,7 @@ int RAND_egd(const char *path)
 	buf[1] = 255;
 	write(fd, buf, 2);
 	if (read(fd, buf, 1) != 1) goto err;
-    if (buf[0] == 0) goto err;
+	if (buf[0] == 0) goto err;
 	num = read(fd, buf, 255);
 	if (num < 1) goto err;
 	RAND_seed(buf, num);
-- 
2.34.1