[115] in The Cryptographic File System users list
Re: Problems with CFS-1.4.0.beta2 under Linux
daemon@ATHENA.MIT.EDU (Charles Karney)
Sun Jan 3 22:41:11 1999
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Date: Sun, 3 Jan 1999 22:40:44 -0500 (EST)
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From: Charles Karney <karney@pppl.gov>
To: benjamin@dante.saar.de
Cc: cfs-users@research.att.com
In-reply-to: <19990104023756.A9112@dante.saar.de> (message from Benjamin
Gerfelder on Mon, 4 Jan 1999 02:37:56 +0100)
Subject: Re: Problems with CFS-1.4.0.beta2 under Linux
Reply-To: karney@princeton.edu
References: <19990104023756.A9112@dante.saar.de>
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I think truerand is broken under Linux. The following patch makes truerand
use /dev/random
--- truerand.c~ Sun Dec 7 00:16:36 1997
+++ truerand.c Sun Sep 13 21:38:06 1998
@@ -88,6 +88,7 @@
#include <sys/time.h>
#include <math.h>
#include <stdio.h>
+#include <fcntl.h>
static jmp_buf env;
static unsigned count;
@@ -134,27 +135,11 @@
unsigned long
raw_truerand()
{
- void (*oldalrm)();
- struct itimerval it;
- unsigned long counts[12];
- unsigned char *qshs();
- unsigned char *r;
unsigned long buf;
- int i;
-
- getitimer(ITIMER_REAL, &it);
- oldalrm = signal(SIGALRM, SIG_IGN);
- for (i=0; i<12; i++) {
- counts[i]=0;
- while ((counts[i] += roulette()) < 512)
- ;
- }
- signal(SIGALRM, oldalrm);
- setitimer(ITIMER_REAL, &it, NULL);
-
- r = qshs(counts,sizeof(counts));
- buf = *((unsigned long *) r);
-
+ int fd;
+ fd=open("/dev/random",O_RDONLY);
+ read(fd,&buf,4);
+ close(fd);
return buf;
}
--
Charles Karney
Plasma Physics Laboratory E-mail: Karney@Princeton.EDU
Princeton University Phone: +1 609 243 2607
Princeton, NJ 08543-0451 FAX: +1 609 243 3438
