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openssh/openssh-6.6p1-entropy.patch
Jakub Jelen 6cf9b8e61b rebase to openssh-7.4p1-1 
* Drop unaccepted (unapplying) coverity patches
 * Drop server support for SSH1 (server)
 * Workaround #2641 for systemd
 * UseLogin is gone
 * Drop upstream commit 28652bca
 * Tighten seccomp filter (cache credentials before entering sandbox) (#1395288)
2017-01-03 14:31:20 +01:00

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diff -up openssh-7.4p1/entropy.c.entropy openssh-7.4p1/entropy.c
--- openssh-7.4p1/entropy.c.entropy 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/entropy.c 2016-12-23 18:34:27.769753570 +0100
@@ -229,6 +229,9 @@ 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-7.4p1/openbsd-compat/Makefile.in.entropy openssh-7.4p1/openbsd-compat/Makefile.in
--- openssh-7.4p1/openbsd-compat/Makefile.in.entropy 2016-12-23 18:34:53.715762155 +0100
+++ openssh-7.4p1/openbsd-compat/Makefile.in 2016-12-23 18:35:15.890769493 +0100
@@ -20,7 +20,7 @@ OPENBSD=base64.o basename.o bcrypt_pbkdf
COMPAT=arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o getrrsetbyname-ldns.o bsd-err.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-setres_id.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xcrypt.o kludge-fd_set.o
-PORTS=port-aix.o port-irix.o port-linux.o port-linux-sshd.o port-solaris.o port-tun.o port-uw.o
+PORTS=port-aix.o port-irix.o port-linux.o port-linux-sshd.o port-linux-prng.o port-solaris.o port-tun.o port-uw.o
.c.o:
$(CC) $(CFLAGS) $(CPPFLAGS) -c $<
diff -up openssh-7.4p1/openbsd-compat/port-linux.h.entropy openssh-7.4p1/openbsd-compat/port-linux.h
--- openssh-7.4p1/openbsd-compat/port-linux.h.entropy 2016-12-23 18:34:27.747753563 +0100
+++ openssh-7.4p1/openbsd-compat/port-linux.h 2016-12-23 18:34:27.769753570 +0100
@@ -34,4 +34,6 @@ void oom_adjust_restore(void);
void oom_adjust_setup(void);
#endif
+void linux_seed(void);
+
#endif /* ! _PORT_LINUX_H */
diff -up openssh-7.4p1/openbsd-compat/port-linux-prng.c.entropy openssh-7.4p1/openbsd-compat/port-linux-prng.c
--- openssh-7.4p1/openbsd-compat/port-linux-prng.c.entropy 2016-12-23 18:34:27.769753570 +0100
+++ openssh-7.4p1/openbsd-compat/port-linux-prng.c 2016-12-23 18:34:27.769753570 +0100
@@ -0,0 +1,59 @@
+/* $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 "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */
+#include "servconf.h"
+#include "port-linux.h"
+#include "key.h"
+#include "hostfile.h"
+#include "auth.h"
+
+void
+linux_seed(void)
+{
+ char *env = getenv("SSH_USE_STRONG_RNG");
+ char *random = "/dev/random";
+ size_t len, ienv, randlen = 14;
+
+ if (!env || !strcmp(env, "0"))
+ random = "/dev/urandom";
+ else if ((ienv = atoi(env)) > randlen)
+ randlen = ienv;
+
+ errno = 0;
+ if ((len = RAND_load_file(random, randlen)) != randlen) {
+ if (errno)
+ fatal ("cannot read from %s, %s", random, strerror(errno));
+ else
+ fatal ("EOF reading %s", random);
+ }
+}
diff -up openssh-7.4p1/ssh.1.entropy openssh-7.4p1/ssh.1
--- openssh-7.4p1/ssh.1.entropy 2016-12-23 18:34:27.754753565 +0100
+++ openssh-7.4p1/ssh.1 2016-12-23 18:34:27.770753571 +0100
@@ -1441,6 +1441,23 @@ For more information, see the
.Cm PermitUserEnvironment
option in
.Xr sshd_config 5 .
+.Sh ENVIRONMENT
+.Bl -tag -width Ds -compact
+.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
+environment variable is set to value other than
+.Cm 0
+the OpenSSL random generator is reseeded from
+.Cm /dev/random .
+The number of bytes read is defined by the SSH_USE_STRONG_RNG value.
+Minimum is 14 bytes.
+This setting is not recommended on the computers without the hardware
+random generator because insufficient entropy causes the connection to
+be blocked until enough entropy is available.
+.El
.Sh FILES
.Bl -tag -width Ds -compact
.It Pa ~/.rhosts
diff -up openssh-7.4p1/ssh-add.0.entropy openssh-7.4p1/ssh-add.0
--- openssh-7.4p1/ssh-add.0.entropy 2016-12-19 06:21:21.000000000 +0100
+++ openssh-7.4p1/ssh-add.0 2016-12-23 18:34:27.770753571 +0100
@@ -88,6 +88,16 @@ ENVIRONMENT
Identifies the path of a UNIX-domain socket used to communicate
with the agent.
+ SSH_USE_STRONG_RNG
+ The reseeding of the OpenSSL random generator is usually done
+ from /dev/urandom. If the SSH_USE_STRONG_RNG environment vari-
+ able is set to value other than 0 the OpenSSL random generator is
+ reseeded from /dev/random. The number of bytes read is defined
+ by the SSH_USE_STRONG_RNG value. Minimum is 14 bytes. This set-
+ ting is not recommended on the computers without the hardware
+ random generator because insufficient entropy causes the connec-
+ tion to be blocked until enough entropy is available.
+
FILES
~/.ssh/identity
Contains the protocol version 1 RSA authentication identity of
diff -up openssh-7.4p1/ssh-add.1.entropy openssh-7.4p1/ssh-add.1
--- openssh-7.4p1/ssh-add.1.entropy 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/ssh-add.1 2016-12-23 18:34:27.770753571 +0100
@@ -171,6 +171,20 @@ 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
+environment variable is set to value other than
+.Cm 0
+the OpenSSL random generator is reseeded from
+.Cm /dev/random .
+The number of bytes read is defined by the SSH_USE_STRONG_RNG value.
+Minimum is 14 bytes.
+This setting is not recommended on the computers without the hardware
+random generator because insufficient entropy causes the connection to
+be blocked until enough entropy is available.
.El
.Sh FILES
.Bl -tag -width Ds
diff -up openssh-7.4p1/ssh-agent.1.entropy openssh-7.4p1/ssh-agent.1
--- openssh-7.4p1/ssh-agent.1.entropy 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/ssh-agent.1 2016-12-23 18:34:27.770753571 +0100
@@ -214,6 +214,24 @@ 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
+environment variable is set to value other than
+.Cm 0
+the OpenSSL random generator is reseeded from
+.Cm /dev/random .
+The number of bytes read is defined by the SSH_USE_STRONG_RNG value.
+Minimum is 14 bytes.
+This setting is not recommended on the computers without the hardware
+random generator because insufficient entropy causes the connection to
+be blocked until enough entropy is available.
+.El
.Sh SEE ALSO
.Xr ssh 1 ,
.Xr ssh-add 1 ,
diff -up openssh-7.4p1/sshd.8.entropy openssh-7.4p1/sshd.8
--- openssh-7.4p1/sshd.8.entropy 2016-12-23 18:34:27.755753566 +0100
+++ openssh-7.4p1/sshd.8 2016-12-23 18:34:27.770753571 +0100
@@ -920,6 +920,24 @@ 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
+environment variable is set to value other than
+.Cm 0
+the OpenSSL random generator is reseeded from
+.Cm /dev/random .
+The number of bytes read is defined by the SSH_USE_STRONG_RNG value.
+Minimum is 14 bytes.
+This setting is not recommended on the computers without the hardware
+random generator because insufficient entropy causes the connection to
+be blocked until enough entropy is available.
+.El
.Sh IPV6
IPv6 address can be used everywhere where IPv4 address. In all entries must be the IPv6 address enclosed in square brackets. Note: The square brackets are metacharacters for the shell and must be escaped in shell.
.Sh SEE ALSO
diff -up openssh-7.4p1/ssh-keygen.1.entropy openssh-7.4p1/ssh-keygen.1
--- openssh-7.4p1/ssh-keygen.1.entropy 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/ssh-keygen.1 2016-12-23 18:34:27.770753571 +0100
@@ -848,6 +848,24 @@ 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
+environment variable is set to value other than
+.Cm 0
+the OpenSSL random generator is reseeded from
+.Cm /dev/random .
+The number of bytes read is defined by the SSH_USE_STRONG_RNG value.
+Minimum is 14 bytes.
+This setting is not recommended on the computers without the hardware
+random generator because insufficient entropy causes the connection to
+be blocked until enough entropy is available.
+.El
.Sh SEE ALSO
.Xr ssh 1 ,
.Xr ssh-add 1 ,
diff -up openssh-7.4p1/ssh-keysign.8.entropy openssh-7.4p1/ssh-keysign.8
--- openssh-7.4p1/ssh-keysign.8.entropy 2016-12-19 05:59:41.000000000 +0100
+++ openssh-7.4p1/ssh-keysign.8 2016-12-23 18:34:27.770753571 +0100
@@ -80,6 +80,24 @@ 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
+environment variable is set to value other than
+.Cm 0
+the OpenSSL random generator is reseeded from
+.Cm /dev/random .
+The number of bytes read is defined by the SSH_USE_STRONG_RNG value.
+Minimum is 14 bytes.
+This setting is not recommended on the computers without the hardware
+random generator because insufficient entropy causes the connection to
+be blocked until enough entropy is available.
+.El
.Sh SEE ALSO
.Xr ssh 1 ,
.Xr ssh-keygen 1 ,
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