Add entropy-harvesting calls.

/dev/random now has new-and-improved entropy!

sys/dev/syscons/syscons.c

@@ -47,6 +47,7 @@
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/cons.h>
+#include <sys/random.h>
 
 #include <machine/clock.h>
 #include <machine/console.h>
@@ -2955,6 +2956,9 @@ scgetc(sc_softc_t *sc, u_int flags)
     if (!(c & RELKEY))
 	sc_touch_scrn_saver();
 
+    /* do the /dev/random device a favour */
+    random_harvest((u_int64_t)c, 1, 0, RANDOM_KEYBOARD);
+
     if (scp->kbd_mode != K_XLATE)
 	return KEYCHAR(c);
 

sys/dev/syscons/sysmouse.c

@@ -32,6 +32,7 @@
 #include <sys/systm.h>
 #include <sys/conf.h>
 #include <sys/proc.h>
+#include <sys/random.h>
 #include <sys/tty.h>
 #include <sys/kernel.h>
 
@@ -333,6 +334,11 @@ sysmouse_event(mouse_info_t *info)
 							       sysmouse_tty);
 	}
 
+	/* do the /dev/random device a favour                        */
+	/* The nasty-looking cast is to force treatment of 8 u_chars */
+	/* in buf as a u_int64_t                                     */
+	random_harvest(*((u_int64_t *)buf), 2, 0, RANDOM_MOUSE);
+
 	return mouse_status.flags;
 }