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From: "csm at gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: java-prs@gcc.gnu.org Subject: [Bug classpath/24481] SecureRandom.setSeed has no impact Date: Tue, 11 Apr 2006 04:21:00 -0000 [thread overview] Message-ID: <20060411042113.30179.qmail@sourceware.org> (raw) In-Reply-To: <bug-24481-11561@http.gcc.gnu.org/bugzilla/> ------- Comment #5 from csm at gnu dot org 2006-04-11 04:21 ------- The original issue seems to be fixed; on gcj version `gcj (GCC) 4.2.0 20060410 (experimental)' I get this output from the `seed' testcase: > Byte difference in a seeded PRNG: 64 > Seed data: 9c1185a5c5e9fc5461288977ee8f548b2258d3138bbc57e4cbe8b6a1d2c999ef6253e0a6e58196ae643db8559e6ba7c97214bd66197b97184d68e3b0654b David, are you saying that if you have a program like: > import java.security.SecureRandom; > > class sr > { > public static void main (String[] argv) throws Throwable > { > SecureRandom sr = new SecureRandom (); > byte[] b = new byte[64]; > sr.nextBytes (b); > for (int i = 0; i < b.length; i++) > { > System.out.print (b[i]); > System.out.print (' '); > } > System.out.println (); > } > } ...that you get the same output every time? If so, this is because our default SecureRandom isn't seeded when created. Ideally, we would try to use `/dev/random,' or some timing data to get a random seed. -- csm at gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |david at jpackage dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24481
next prev parent reply other threads:[~2006-04-11 4:21 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2005-10-22 0:52 [Bug java/24481] New: " jrandom-gcc at i2p dot net 2005-10-22 2:28 ` [Bug classpath/24481] " pinskia at gcc dot gnu dot org 2005-10-22 2:36 ` pinskia at gcc dot gnu dot org 2005-10-24 18:47 ` tromey at gcc dot gnu dot org 2006-04-07 11:07 ` david at jpackage dot org 2006-04-11 4:21 ` csm at gnu dot org [this message] 2006-04-11 4:34 ` david at jpackage dot org 2006-04-11 20:58 ` csm at gnu dot org 2006-04-12 0:11 ` david at jpackage dot org 2006-04-12 4:46 ` csm at gnu dot org 2006-04-12 16:39 ` cvs-commit at developer dot classpath dot org 2006-04-12 18:19 ` csm at gnu dot org
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