diff -up openssh-5.8p1/entropy.c.entropy openssh-5.8p1/entropy.c

--- openssh-5.8p1/entropy.c.entropy	2011-01-13 11:05:29.000000000 +0100

+++ openssh-5.8p1/entropy.c	2011-04-01 10:23:58.318648953 +0200

@@ -50,6 +50,7 @@

 #include "pathnames.h"

 #include "log.h"

 #include "buffer.h"

+#include "openbsd-compat/port-linux.h"

 /*

  * Portable OpenSSH PRNG seeding:

@@ -144,6 +145,9 @@ seed_rng(void)

 	memset(buf, '\0', sizeof(buf));

 #endif /* OPENSSL_PRNG_ONLY */

+#ifdef __linux__

+	linux_seed();

+#endif /* __linux__ */

 	if (RAND_status() != 1)

 		fatal("PRNG is not seeded");

 }

diff -up openssh-5.8p1/openbsd-compat/Makefile.in.entropy openssh-5.8p1/openbsd-compat/Makefile.in

--- openssh-5.8p1/openbsd-compat/Makefile.in.entropy	2010-10-07 13:19:24.000000000 +0200

+++ openssh-5.8p1/openbsd-compat/Makefile.in	2011-04-01 10:21:38.251648364 +0200

@@ -20,7 +20,7 @@ OPENBSD=base64.o basename.o bindresvport

 COMPAT=bsd-arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o

-PORTS=port-aix.o port-irix.o port-linux.o port-solaris.o port-tun.o port-uw.o

+PORTS=port-aix.o port-irix.o port-linux.o port-linux-prng.o port-solaris.o port-tun.o port-uw.o

 .c.o:

 	$(CC) $(CFLAGS) $(CPPFLAGS) -c $<

diff -up openssh-5.8p1/openbsd-compat/port-linux.h.entropy openssh-5.8p1/openbsd-compat/port-linux.h

--- openssh-5.8p1/openbsd-compat/port-linux.h.entropy	2011-04-01 10:22:10.165648950 +0200

+++ openssh-5.8p1/openbsd-compat/port-linux.h	2011-04-01 10:22:36.965648719 +0200

@@ -19,6 +19,8 @@

 #ifndef _PORT_LINUX_H

 #define _PORT_LINUX_H

+void linux_seed(void);

+

 #ifdef WITH_SELINUX

 int ssh_selinux_enabled(void);

 void ssh_selinux_setup_pty(char *, const char *);

diff -up openssh-5.8p1/openbsd-compat/port-linux-prng.c.entropy openssh-5.8p1/openbsd-compat/port-linux-prng.c

--- openssh-5.8p1/openbsd-compat/port-linux-prng.c.entropy	2011-04-01 10:21:38.302648133 +0200

+++ openssh-5.8p1/openbsd-compat/port-linux-prng.c	2011-04-01 10:21:38.311648282 +0200

@@ -0,0 +1,56 @@

+/* $Id: port-linux.c,v 1.11.4.2 2011/02/04 00:43:08 djm Exp $ */

+

+/*

+ * Copyright (c) 2011 Jan F. Chadima <jchadima@redhat.com>

+ *

+ * Permission to use, copy, modify, and distribute this software for any

+ * purpose with or without fee is hereby granted, provided that the above

+ * copyright notice and this permission notice appear in all copies.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ */

+

+/*

+ * Linux-specific portability code - prng support

+ */

+

+#include "includes.h"

+

+#include <errno.h>

+#include <stdarg.h>

+#include <string.h>

+#include <stdio.h>

+#include <openssl/rand.h>

+

+#include "log.h"

+#include "xmalloc.h"

+#include "servconf.h"

+#include "port-linux.h"

+#include "key.h"

+#include "hostfile.h"

+#include "auth.h"

+

+void

+linux_seed(void)

+{

+	int len;

+	char *env = getenv("SSH_USE_STRONG_RNG");

+	char *random = "/dev/urandom";

+

+	if (env && !strcmp(env, "1"))

+		random = "/dev/random";

+

+	errno = 0;

+	if ((len = RAND_load_file(random, 48)) != 48) {

+		if (errno)

+			fatal ("cannot read from %s, %s", random, strerror(errno));

+		else

+			fatal ("EOF reading %s", random);

+	}

+}

diff -up openssh-5.8p1/ssh.1.entropy openssh-5.8p1/ssh.1

--- openssh-5.8p1/ssh.1.entropy	2010-11-20 05:21:03.000000000 +0100

+++ openssh-5.8p1/ssh.1	2011-04-01 10:21:38.352648197 +0200

@@ -1250,6 +1250,17 @@ For more information, see the

 .Cm PermitUserEnvironment

 option in

 .Xr sshd_config 5 .

+.It Ev SSH_USE_STRONG_RNG

+The reseeding of the OpenSSL random generator is usually done from

+.Cm /dev/urandom .

+If the 

+.Cm SSH_USE_STRONG_RNG

+is set to

+.Cm 1 ,

+the OpenSSL random generator is reseeded from

+.Cm /dev/random .

+This setting is not recommended on the computers without the hardware

+random generator. Insuifficient entropy causes the blocking conection.

 .Sh FILES

 .Bl -tag -width Ds -compact

 .It Pa ~/.rhosts

diff -up openssh-5.8p1/ssh-add.1.entropy openssh-5.8p1/ssh-add.1

--- openssh-5.8p1/ssh-add.1.entropy	2010-11-05 00:20:14.000000000 +0100

+++ openssh-5.8p1/ssh-add.1	2011-04-01 10:21:38.416648713 +0200

@@ -157,6 +157,17 @@ to make this work.)

 Identifies the path of a

 .Ux Ns -domain

 socket used to communicate with the agent.

+.It Ev SSH_USE_STRONG_RNG

+The reseeding of the OpenSSL random generator is usually done from

+.Cm /dev/urandom .

+If the 

+.Cm SSH_USE_STRONG_RNG

+is set to

+.Cm 1 ,

+the OpenSSL random generator is reseeded from

+.Cm /dev/random .

+This setting is not recommended on the computers without the hardware

+random generator. Insuifficient entropy causes the blocking conection.

 .El

 .Sh FILES

 .Bl -tag -width Ds

diff -up openssh-5.8p1/ssh-agent.1.entropy openssh-5.8p1/ssh-agent.1

--- openssh-5.8p1/ssh-agent.1.entropy	2010-12-01 01:50:35.000000000 +0100

+++ openssh-5.8p1/ssh-agent.1	2011-04-01 10:21:38.459648714 +0200

@@ -198,6 +198,20 @@ sockets used to contain the connection t

 These sockets should only be readable by the owner.

 The sockets should get automatically removed when the agent exits.

 .El

+.Sh ENVIRONMENT

+.Bl -tag -width Ds -compact

+.Pp

+.It Pa SSH_USE_STRONG_RNG

+The reseeding of the OpenSSL random generator is usually done from

+.Cm /dev/urandom .

+If the 

+.Cm SSH_USE_STRONG_RNG

+is set to

+.Cm 1 ,

+the OpenSSL random generator is reseeded from

+.Cm /dev/random .

+This setting is not recommended on the computers without the hardware

+random generator. Insuifficient entropy causes the blocking conection.

 .Sh SEE ALSO

 .Xr ssh 1 ,

 .Xr ssh-add 1 ,

diff -up openssh-5.8p1/sshd.8.entropy openssh-5.8p1/sshd.8

--- openssh-5.8p1/sshd.8.entropy	2010-11-05 00:20:14.000000000 +0100

+++ openssh-5.8p1/sshd.8	2011-04-01 10:21:38.505648778 +0200

@@ -937,6 +937,20 @@ concurrently for different ports, this c

 started last).

 The content of this file is not sensitive; it can be world-readable.

 .El

+.Sh ENVIRONMENT

+.Bl -tag -width Ds -compact

+.Pp

+.It Pa SSH_USE_STRONG_RNG

+The reseeding of the OpenSSL random generator is usually done from

+.Cm /dev/urandom .

+If the 

+.Cm SSH_USE_STRONG_RNG

+is set to

+.Cm 1 ,

+the OpenSSL random generator is reseeded from

+.Cm /dev/random .

+This setting is not recommended on the computers without the hardware

+random generator. Insuifficient entropy causes the blocking conection.

 .Sh SEE ALSO

 .Xr scp 1 ,

 .Xr sftp 1 ,

diff -up openssh-5.8p1/ssh-keygen.1.entropy openssh-5.8p1/ssh-keygen.1

--- openssh-5.8p1/ssh-keygen.1.entropy	2010-11-05 00:20:14.000000000 +0100

+++ openssh-5.8p1/ssh-keygen.1	2011-04-01 10:21:38.554648691 +0200

@@ -655,6 +655,20 @@ Contains Diffie-Hellman groups used for 

 The file format is described in

 .Xr moduli 5 .

 .El

+.Sh ENVIRONMENT

+.Bl -tag -width Ds -compact

+.Pp

+.It Pa SSH_USE_STRONG_RNG

+The reseeding of the OpenSSL random generator is usually done from

+.Cm /dev/urandom .

+If the 

+.Cm SSH_USE_STRONG_RNG

+is set to

+.Cm 1 ,

+the OpenSSL random generator is reseeded from

+.Cm /dev/random .

+This setting is not recommended on the computers without the hardware

+random generator. Insuifficient entropy causes the blocking conection.

 .Sh SEE ALSO

 .Xr ssh 1 ,

 .Xr ssh-add 1 ,

diff -up openssh-5.8p1/ssh-keysign.8.entropy openssh-5.8p1/ssh-keysign.8

--- openssh-5.8p1/ssh-keysign.8.entropy	2010-08-31 14:41:14.000000000 +0200

+++ openssh-5.8p1/ssh-keysign.8	2011-04-01 10:21:38.606648660 +0200

@@ -78,6 +78,20 @@ must be set-uid root if host-based authe

 If these files exist they are assumed to contain public certificate

 information corresponding with the private keys above.

 .El

+.Sh ENVIRONMENT

+.Bl -tag -width Ds -compact

+.Pp

+.It Pa SSH_USE_STRONG_RNG

+The reseeding of the OpenSSL random generator is usually done from

+.Cm /dev/urandom .

+If the 

+.Cm SSH_USE_STRONG_RNG

+is set to

+.Cm 1 ,

+the OpenSSL random generator is reseeded from

+.Cm /dev/random .

+This setting is not recommended on the computers without the hardware

+random generator. Insuifficient entropy causes the blocking conection.

 .Sh SEE ALSO

 .Xr ssh 1 ,

 .Xr ssh-keygen 1 ,