shichao-an/setup-ldap-client.sh

## setup-ldap-client.sh
#!/bin/bash
# vim: softtabstop=4 shiftwidth=4 expandtab fenc=utf-8 spell spelllang=en cc=120

set -e

# Check Ubuntu release
[ "$(lsb_release -sc)" = "trusty" ] || {
    echo 'This script should be run on Ubuntu 14.04.' >&2
    exit 1
}

# LDAP group name of team members to be granted access on this server,
LDAP_TEAM_NAME=$1
LDAP_BASE="dc=example,dc=com"
LDAP_URI="ldaps://ldap.example.com"
LDAP_BINDDN="cn=OpenLDAP Client,ou=users,dc=example,dc=com"
LDAP_BINDPW="password"

USAGE="usage: ./$(basename $0) LDAP_TEAM_NAME"

# Check required positional parameters
[ $# -ne 1 ] && {
    echo "$USAGE" >&2
    exit 1
}
# Install required packages
export DEBIAN_FRONTEND=noninteractive
# The following command will implicitly install libnss-ldap
apt-get -y install libpam-ldap nscd ldap-utils
apt-get -y install python-pip python-ldap
pip install ssh-ldap-pubkey

# Configure SSH server
grep 'AuthorizedKeysCommand' /etc/ssh/sshd_config > /dev/null || {
    cat >> /etc/ssh/sshd_config <<EOF
AuthorizedKeysCommand /usr/local/bin/ssh-ldap-pubkey-wrapper
AuthorizedKeysCommandUser nobody
EOF
}

# Restart SSH server
service ssh restart

# Edit /etc/ldap.conf
mv /etc/ldap.conf /etc/ldap.conf.bak
cat > /etc/ldap.conf <<EOF
base $LDAP_BASE
uri $LDAP_URI
ldap_version 3
binddn $LDAP_BINDDN
bindpw $LDAP_BINDPW
pam_password md5
nss_initgroups_ignoreusers backup,bin,daemon,games,gnats,irc,landscape,libuuid,list,lp,mail,man,messagebus,news,pollinate,proxy,root,sshd,sync,sys,syslog,uucp,www-data
bind_timelimit 3
timelimit 3
EOF

# Edit /etc/ldap/ldap.conf
cp /etc/ldap/ldap.conf /etc/ldap/ldap.conf.bak
grep 'TLS_REQCERT' /etc/ldap/ldap.conf > /dev/null || {
    cat >> /etc/ldap/ldap.conf <<EOF
TLS_REQCERT     never
EOF
}

# Configure PAM
# Add pam_access.so
grep 'pam_access.so' /etc/pam.d/common-auth > /dev/null || {
    cat >> /etc/pam.d/common-auth <<EOF
account required    pam_access.so
EOF
}

# Remove use_authtok from /etc/pam.d/common-password
sed -i -r 's/(.*)(use_authtok)(.*)/\1\3/g' /etc/pam.d/common-password

# Add pam_mkhomedir.so
grep 'pam_mkhomedir.so' /etc/pam.d/common-session > /dev/null || {
    cat >> /etc/pam.d/common-session <<EOF
session required    pam_mkhomedir.so skel=/etc/skel umask=0022
EOF
}

# Configure NSS
sed -i -r 's/(^passwd:)(\s+)(.*)/\1\2compat ldap/' /etc/nsswitch.conf
sed -i -r 's/(^group:)(\s+)(.*)/\1\2compat ldap/' /etc/nsswitch.conf
sed -i -r 's/(^shadow:)(\s+)(.*)/\1\2compat ldap/' /etc/nsswitch.conf

# Edit /etc/security/access.conf
grep -- '^- : ALL EXCEPT root' /etc/security/access.conf > /dev/null || {
    cat >> /etc/security/access.conf <<EOF
+ : ($LDAP_TEAM_NAME) : ALL
- : ALL EXCEPT root (admin) (wheel) : ALL EXCEPT LOCAL
EOF
}

# Edit /etc/sudoers
grep -F -- "%$LDAP_TEAM_NAME" /etc/sudoers > /dev/null || {
    cat >> /etc/sudoers <<EOF
%$LDAP_TEAM_NAME ALL=(ALL) ALL
EOF
}

# Restart nscd
service nscd restart
	#!/bin/bash
	# vim: softtabstop=4 shiftwidth=4 expandtab fenc=utf-8 spell spelllang=en cc=120

	set -e

	# Check Ubuntu release
	[ "$(lsb_release -sc)" = "trusty" ] \|\| {
	echo 'This script should be run on Ubuntu 14.04.' >&2
	exit 1
	}

	# LDAP group name of team members to be granted access on this server,
	LDAP_TEAM_NAME=$1
	LDAP_BASE="dc=example,dc=com"
	LDAP_URI="ldaps://ldap.example.com"
	LDAP_BINDDN="cn=OpenLDAP Client,ou=users,dc=example,dc=com"
	LDAP_BINDPW="password"

	USAGE="usage: ./$(basename $0) LDAP_TEAM_NAME"

	# Check required positional parameters
	[ $# -ne 1 ] && {
	echo "$USAGE" >&2
	exit 1
	}
	# Install required packages
	export DEBIAN_FRONTEND=noninteractive
	# The following command will implicitly install libnss-ldap
	apt-get -y install libpam-ldap nscd ldap-utils
	apt-get -y install python-pip python-ldap
	pip install ssh-ldap-pubkey

	# Configure SSH server
	grep 'AuthorizedKeysCommand' /etc/ssh/sshd_config > /dev/null \|\| {
	cat >> /etc/ssh/sshd_config <<EOF
	AuthorizedKeysCommand /usr/local/bin/ssh-ldap-pubkey-wrapper
	AuthorizedKeysCommandUser nobody
	EOF
	}

	# Restart SSH server
	service ssh restart

	# Edit /etc/ldap.conf
	mv /etc/ldap.conf /etc/ldap.conf.bak
	cat > /etc/ldap.conf <<EOF
	base $LDAP_BASE
	uri $LDAP_URI
	ldap_version 3
	binddn $LDAP_BINDDN
	bindpw $LDAP_BINDPW
	pam_password md5
	nss_initgroups_ignoreusers backup,bin,daemon,games,gnats,irc,landscape,libuuid,list,lp,mail,man,messagebus,news,pollinate,proxy,root,sshd,sync,sys,syslog,uucp,www-data
	bind_timelimit 3
	timelimit 3
	EOF

	# Edit /etc/ldap/ldap.conf
	cp /etc/ldap/ldap.conf /etc/ldap/ldap.conf.bak
	grep 'TLS_REQCERT' /etc/ldap/ldap.conf > /dev/null \|\| {
	cat >> /etc/ldap/ldap.conf <<EOF
	TLS_REQCERT never
	EOF
	}

	# Configure PAM
	# Add pam_access.so
	grep 'pam_access.so' /etc/pam.d/common-auth > /dev/null \|\| {
	cat >> /etc/pam.d/common-auth <<EOF
	account required pam_access.so
	EOF
	}

	# Remove use_authtok from /etc/pam.d/common-password
	sed -i -r 's/(.)(use_authtok)(.)/\1\3/g' /etc/pam.d/common-password

	# Add pam_mkhomedir.so
	grep 'pam_mkhomedir.so' /etc/pam.d/common-session > /dev/null \|\| {
	cat >> /etc/pam.d/common-session <<EOF
	session required pam_mkhomedir.so skel=/etc/skel umask=0022
	EOF
	}

	# Configure NSS
	sed -i -r 's/(^passwd:)(\s+)(.*)/\1\2compat ldap/' /etc/nsswitch.conf
	sed -i -r 's/(^group:)(\s+)(.*)/\1\2compat ldap/' /etc/nsswitch.conf
	sed -i -r 's/(^shadow:)(\s+)(.*)/\1\2compat ldap/' /etc/nsswitch.conf

	# Edit /etc/security/access.conf
	grep -- '^- : ALL EXCEPT root' /etc/security/access.conf > /dev/null \|\| {
	cat >> /etc/security/access.conf <<EOF
	+ : ($LDAP_TEAM_NAME) : ALL
	- : ALL EXCEPT root (admin) (wheel) : ALL EXCEPT LOCAL
	EOF
	}

	# Edit /etc/sudoers
	grep -F -- "%$LDAP_TEAM_NAME" /etc/sudoers > /dev/null \|\| {
	cat >> /etc/sudoers <<EOF
	%$LDAP_TEAM_NAME ALL=(ALL) ALL
	EOF
	}

	# Restart nscd
	service nscd restart