From ebee8631d978652df62ed35355e58e297d646eae Mon Sep 17 00:00:00 2001
From: mickey <mickey@openbsd.org>
Date: Wed, 24 Apr 1996 21:26:36 +0000
Subject: [PATCH] Supply randomness source for the rnd device.

---
 sys/dev/rnd.c    | 22 +++++++++++++++++++---
 sys/dev/rndvar.h |  4 ++--
 sys/kern/tty.c   | 10 +++++++++-
 3 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/sys/dev/rnd.c b/sys/dev/rnd.c
index 242343ada66..7730f1baf0d 100644
--- a/sys/dev/rnd.c
+++ b/sys/dev/rnd.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rnd.c,v 1.2 1996/04/17 04:59:48 mickey Exp $	*/
+/*	$OpenBSD: rnd.c,v 1.3 1996/04/24 21:26:41 mickey Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff.
@@ -266,7 +266,7 @@ struct timer_rand_state {
 /* tags for different random sources */
 #define	ENT_NET		0x100
 #define	ENT_BLKDEV	0x200
-#define ENT_IRQ		0x300
+#define ENT_TTY		0x300
 
 /* device functions prototypes: XXX move em to dev_conf.h */
 cdev_decl(rnd);
@@ -278,6 +278,7 @@ static struct timer_rand_state mouse_timer_state;
 static struct timer_rand_state extract_timer_state;
 static struct timer_rand_state net_timer_state[32];	/* XXX */
 static struct timer_rand_state *blkdev_timer_state;
+static struct timer_rand_state *tty_timer_state;
 static int	rnd_sleep = 0;
 
 #ifndef MIN
@@ -297,6 +298,9 @@ rndattach(num)
 	blkdev_timer_state = malloc(nblkdev*sizeof(*blkdev_timer_state),
 				    M_DEVBUF, M_WAITOK);
 	bzero(blkdev_timer_state, nblkdev*sizeof(*blkdev_timer_state));
+	tty_timer_state = malloc(nchrdev*sizeof(*tty_timer_state),
+				    M_DEVBUF, M_WAITOK);
+	bzero(tty_timer_state, nchrdev*sizeof(*tty_timer_state));
 	extract_timer_state.dont_count_entropy = 1;
 }
 
@@ -466,13 +470,25 @@ void
 add_blkdev_randomness(dev)
 	dev_t	dev;
 {
-	if (major(dev) >= nblkdev || blkdev_timer_state == NULL)
+	if (major(dev) <= nblkdev || blkdev_timer_state == NULL)
 		return;
 
 	add_timer_randomness(&random_state, &blkdev_timer_state[major(dev)],
 			     ENT_BLKDEV + major(dev));
 }
 
+void
+add_tty_randomness(dev, c)
+	dev_t	dev;
+	int	c;
+{
+	if (major(dev) <= nchrdev || tty_timer_state == NULL)
+		return;
+
+	add_timer_randomness(&random_state, &tty_timer_state[major(dev)],
+			     ENT_TTY + c);
+}
+
 #if POOLWORDS % 16
 #error extract_entropy() assumes that POOLWORDS is a multiple of 16 words.
 #endif
diff --git a/sys/dev/rndvar.h b/sys/dev/rndvar.h
index 44b37d98f0d..a808f0dfe3e 100644
--- a/sys/dev/rndvar.h
+++ b/sys/dev/rndvar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: rndvar.h,v 1.1 1996/03/29 12:09:58 mickey Exp $	*/
+/*	$OpenBSD: rndvar.h,v 1.2 1996/04/24 21:26:43 mickey Exp $	*/
 
 /*
  * Copyright (c) 1996 Michael Shalayeff.
@@ -46,10 +46,10 @@
 
 #ifdef _KERNEL
 
-extern void add_keyboard_randomness __P((u_char));
 extern void add_mouse_randomness __P((u_int32_t));
 extern void add_net_randomness __P((int));
 extern void add_blkdev_randomness __P((dev_t));
+extern void add_tty_randomness __P((dev_t, int));
 
 extern void get_random_bytes __P((void *, size_t));
 
diff --git a/sys/kern/tty.c b/sys/kern/tty.c
index 5b1d770befb..021f4774291 100644
--- a/sys/kern/tty.c
+++ b/sys/kern/tty.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: tty.c,v 1.4 1996/04/21 22:27:28 deraadt Exp $	*/
+/*	$OpenBSD: tty.c,v 1.5 1996/04/24 21:26:36 mickey Exp $	*/
 /*	$NetBSD: tty.c,v 1.68 1996/03/29 01:55:12 christos Exp $	*/
 
 /*-
@@ -61,6 +61,11 @@
 
 #include <vm/vm.h>
 
+#include "rnd.h"
+#if NRND
+#include <dev/rndvar.h>
+#endif
+
 static int ttnread __P((struct tty *));
 static void ttyblock __P((struct tty *));
 static void ttyecho __P((int, struct tty *));
@@ -225,6 +230,9 @@ ttyinput(c, tp)
 	register u_char *cc;
 	int i, error;
 
+#if NRND
+	add_tty_randomness(tp->t_dev, c);
+#endif
 	/*
 	 * If input is pending take it first.
 	 */
-- 
2.20.1