openssh: fix login problems

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

recipes-tweaks/openssh/files/auth2-none.c-avoid-authenticate-empty-passwords-to-m.patch

@@ -0,0 +1,30 @@
+Upstream-Status: Pending
+
+Subject: auth2-none.c: avoid authenticate empty passwords to mess up with PAM
+
+If UsePAM, PermitEmptyPasswords, PasswordAuthentication are enabled. The ssh daemon
+will try to authenticate an empty password, resulting in login failures of any user.
+If PAM is enabled, then we should leave the task of password authentication to PAM.
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+
+---
+ auth2-none.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/auth2-none.c b/auth2-none.c
+index c8c6c74..b48b2fd 100644
+--- a/auth2-none.c
++++ b/auth2-none.c
+@@ -61,7 +61,7 @@ userauth_none(Authctxt *authctxt)
+ {
+ 	none_enabled = 0;
+ 	packet_check_eom();
+-	if (options.permit_empty_passwd && options.password_authentication)
++	if (options.permit_empty_passwd && options.password_authentication && !options.use_pam)
+ 		return (PRIVSEP(auth_password(authctxt, "")));
+ 	return (0);
+ }
+-- 
+1.7.9.5
+

recipes-tweaks/openssh/files/sshd_config

@@ -0,0 +1,119 @@
+#	$OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $
+
+# This is the sshd server system-wide configuration file.  See
+# sshd_config(5) for more information.
+
+# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
+
+# The strategy used for options in the default sshd_config shipped with
+# OpenSSH is to specify options with their default value where
+# possible, but leave them commented.  Uncommented options change a
+# default value.
+
+#Port 22
+#AddressFamily any
+#ListenAddress 0.0.0.0
+#ListenAddress ::
+
+# Disable legacy (protocol version 1) support in the server for new
+# installations. In future the default will change to require explicit
+# activation of protocol 1
+Protocol 2
+
+# HostKey for protocol version 1
+#HostKey /etc/ssh/ssh_host_key
+# HostKeys for protocol version 2
+#HostKey /etc/ssh/ssh_host_rsa_key
+#HostKey /etc/ssh/ssh_host_dsa_key
+
+# Lifetime and size of ephemeral version 1 server key
+#KeyRegenerationInterval 1h
+#ServerKeyBits 1024
+
+# Logging
+# obsoletes QuietMode and FascistLogging
+#SyslogFacility AUTH
+#LogLevel INFO
+
+# Authentication:
+
+#LoginGraceTime 2m
+#PermitRootLogin yes
+#StrictModes yes
+#MaxAuthTries 6
+#MaxSessions 10
+
+#RSAAuthentication yes
+#PubkeyAuthentication yes
+#AuthorizedKeysFile	.ssh/authorized_keys
+
+# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
+#RhostsRSAAuthentication no
+# similar for protocol version 2
+#HostbasedAuthentication no
+# Change to yes if you don't trust ~/.ssh/known_hosts for
+# RhostsRSAAuthentication and HostbasedAuthentication
+#IgnoreUserKnownHosts no
+# Don't read the user's ~/.rhosts and ~/.shosts files
+#IgnoreRhosts yes
+
+# To disable tunneled clear text passwords, change to no here!
+# PasswordAuthentication no
+PermitEmptyPasswords yes
+
+# Change to no to disable s/key passwords
+ChallengeResponseAuthentication yes
+
+# Kerberos options
+#KerberosAuthentication no
+#KerberosOrLocalPasswd yes
+#KerberosTicketCleanup yes
+#KerberosGetAFSToken no
+
+# GSSAPI options
+#GSSAPIAuthentication no
+#GSSAPICleanupCredentials yes
+
+# Set this to 'yes' to enable PAM authentication, account processing, 
+# and session processing. If this is enabled, PAM authentication will 
+# be allowed through the ChallengeResponseAuthentication and
+# PasswordAuthentication.  Depending on your PAM configuration,
+# PAM authentication via ChallengeResponseAuthentication may bypass
+# the setting of "PermitRootLogin without-password".
+# If you just want the PAM account and session checks to run without
+# PAM authentication, then enable this but set PasswordAuthentication
+# and ChallengeResponseAuthentication to 'no'.
+#UsePAM no
+
+#AllowAgentForwarding yes
+#AllowTcpForwarding yes
+#GatewayPorts no
+#X11Forwarding no
+#X11DisplayOffset 10
+#X11UseLocalhost yes
+#PrintMotd yes
+#PrintLastLog yes
+#TCPKeepAlive yes
+#UseLogin no
+UsePrivilegeSeparation yes
+#PermitUserEnvironment no
+Compression no
+ClientAliveInterval 15
+ClientAliveCountMax 4
+#UseDNS yes
+#PidFile /var/run/sshd.pid
+#MaxStartups 10
+#PermitTunnel no
+#ChrootDirectory none
+
+# no default banner path
+#Banner none
+
+# override default of no subsystems
+Subsystem	sftp	/usr/libexec/sftp-server
+
+# Example of overriding settings on a per-user basis
+#Match User anoncvs
+#	X11Forwarding no
+#	AllowTcpForwarding no
+#	ForceCommand cvs server

recipes-tweaks/openssh/openssh_%.bbappend

@@ -1,3 +1,7 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+
+SRC_URI_append = " file://auth2-none.c-avoid-authenticate-empty-passwords-to-m.patch "
+
 do_install_append () {
 	sed -i -e 's:^#PasswordAuthentication.*$:PasswordAuthentication no:g' ${D}${sysconfdir}/ssh/sshd_config
 }