Samba通过Openldap统一认证

1.环境准备
1.1、实验环境
[root@moban ~]# cat /etc/redhat-release
CentOS release 6.8 (Final)
[root@moban ~]# uname -r
2.6.32-642.el6.x86_64

1.2、校准服务器时间
[root@moban ~]# ntpdate pool.ntp.org
12 Nov 01:11:59 ntpdate[2354]: adjust time server 202.118.1.81 offset 0.004307 sec
[root@moban ~]# crontab -l
#time sync
*/5 * * * * /usr/sbin/ntpdate pool.ntp.org >/dev/null 2>&1

1.3、关闭selinux和iptables
[root@moban ~]# getenforce  
Enforcing
[root@moban ~]# setenforce 0
[root@moban ~]# getenforce  
Permissive
[root@moban ~]# service iptables stop

2.Openldap和Samba的安装配置
2.1、安装Openldap和Samba
[root@moban ~]# yum -y install openldap openldap-clients openldap-servers nss-pam-ldapd
[root@moban ~]# yum -y install samba-common samba samba-client

2.2、配置openldap
a.Openldap引用samba.schema
[root@moban ~]# cp /usr/share/doc/samba-3.6.23/LDAP/samba.schema /etc/openldap  /schema/

b.拷贝openldap的示例配置文件
[root@moban ~]# cp /usr/share/openldap-servers/slapd.conf.obsolete /etc/openldap/slapd.conf

c.生成ldap管理员密码
[root@moban ~]# slappasswd -s 123456
{SSHA}Ae1JJTvbeP60y91e9MdAqOmpleSWG19o

d.修改配置文件
[root@moban ~]# vi /etc/openldap/slapd.conf
在18行插入如下内容:
18 include         /etc/openldap/schema/samba.schema

注释掉99行到102行:

99 # database config
    100 # access to *
    101 #       by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
    102 #       by * none

在111行插入如下访问权限内容:
    111 access to attrs=userPassword
    112   by self write
    113   by anonymous auth
    114   by * none
    115 access to attrs=sambaNTPassword
    116   by self write
    117   by anonymous auth
    118   by * none
    119 access to *
    120   by self write
    121   by * read
修改126行到134行的内容为:
修改前:
    126 database        bdb
    127 suffix          "dc=my-domain,dc=com"
    128 checkpoint      1024 15
    129 rootdn          "cn=Manager,dc=my-domain,dc=com"
    130 # Cleartext passwords, especially for the rootdn, should
    131 # be avoided.  See slappasswd(8) and slapd.conf(5) for d
        etails.
    132 # Use of strong authentication encouraged.
    133 # rootpw                secret
    134 # rootpw                {crypt}ijFYNcSNctBYg
修改后:
    126 database        bdb
    127 suffix          "dc=etiantian,dc=org"
    128 checkpoint      1024 15
    129 rootdn          "cn=admin,dc=etiantian,dc=org"
    130 # Cleartext passwords, especially for the rootdn, should
    131 # be avoided.  See slappasswd(8) and slapd.conf(5) for d
        etails.
    132 # Use of strong authentication encouraged.
    133 # rootpw                secret
    134 rootpw          {SSHA}Ae1JJTvbeP60y91e9MdAqOmpleSWG19o
修改143行的内容为:
修改前:
index ou,cn,mail,surname,givenname      eq,pres,sub
修改后:
index ou,cn,mail,surname,givenname      eq,pres,sub,approx
修改105行到109行的内容为:
修改前:
    105 database monitor
    106 access to *
    107         by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn
        =external,cn=auth" read
    108         by dn.exact="cn=Manager,dc=my-domain,dc=com" read
    109         by * none
修改后:
    105 database monitor
    106 access to *
    107         by dn.exact="cn=admin,dc=etiantian,dc=org" read
    108         by * none

2.3、初始化openldap
a.删除openldap原始的配置文件和数据
[root@moban ~]# rm -rf /etc/openldap/slapd.d/*
[root@moban ~]# rm -rf /var/lib/ldap/*

b.拷贝数据库的配置文件
[root@moban ~]# cp /usr/share/openldap-servers/DB_CONFIG.example /var/lib/ldap/DB_CONFIG
[root@moban ~]# chown ldap.ldap -R /var/lib/ldap
[root@moban ~]# ll /var/lib/ldap
total 4
-rw-r--r--. 1 ldap ldap 845 Nov 12 01:54 DB_CONFIG

c.生成2.4版本的配置文件
[root@moban ldap]# slaptest -u
config file testing succeeded
[root@moban ldap]# slaptest -f /etc/openldap/slapd.conf -F /etc/openldap/slapd.d/  #生成旧版本的配置文件
config file testing succeeded

d.初始化openldap的基础数据
[root@moban openldap]# vi base.ldif
dn: dc=etiantian,dc=org
objectClass: organization
objectClass: dcObject
dc: etiantian
o: etiantian

dn: ou=People,dc=etiantian,dc=org
objectClass: organizationalUnit
ou: People

dn: ou=group,dc=etiantian,dc=org
objectClass: organizationalUnit
ou: group
[root@moban openldap]# vi group.ldif
dn: cn=DBA,ou=group,dc=etiantian,dc=org
objectClass: posixGroup
objectClass: top
cn: DBA
memberUid: test1
gidNumber: 10673
[root@moban openldap]# vi user.ldif
dn: uid=test1,ou=People,dc=etiantian,dc=org
objectClass: posixAccount
objectClass: top
objectClass: inetOrgPerson
objectClass: shadowAccount
gidNumber: 0
givenName: test1
sn: test1
uid: test1
homeDirectory: /home/test1
loginShell: /bin/bash
shadowFlag: 0
shadowMin: 0
shadowMax: 99999
shadowWarning: 0
shadowInactive: 99999
shadowLastChange: 12011
shadowExpire: 99999
cn: test1
uidNumber: 24422

e.把基础数据导入ldap
[root@moban openldap]# slapadd -l base.ldif
58260c66 The first database does not allow slapadd; using the first available one (2)
_#################### 100.00% eta   none elapsed            none fast!         
Closing DB...
[root@moban openldap]# slapadd -l group.ldif
58260c6d The first database does not allow slapadd; using the first available one (2)
_#################### 100.00% eta   none elapsed            none fast!         
Closing DB...
[root@moban openldap]# slapadd -l user.ldif
58260c72 The first database does not allow slapadd; using the first available one (2)
_#################### 100.00% eta   none elapsed            none fast!         
Closing DB...
[root@moban openldap]# chown -R ldap.ldap /var/lib/ldap
[root@moban openldap]# chown -R ldap.ldap /etc/openldap/slapd.d

[root@moban openldap]# chmod -R 700 /var/lib/ldap
[root@moban openldap]# chmod -R 700 /etc/openldap/slapd.d

2.4、配置samba
a.修改samba的配置
[root@moban openldap]# cd /etc/samba/
[root@moban samba]# cp smb.conf smb.conf.ori
[root@moban samba]# vi smb.conf
[global]
workgroup = WORKGROUP
server string = Samba-ldap Server Version %v
netbios name = samba-ldapsam
log file = /var/log/samba/log.%m
max log size = 50
security = user
passdb backend = ldapsam:ldap://192.168.0.111/
ldap suffix = "dc=etiantian,dc=org"
ldap admin dn = "cn=admin,dc=etiantian,dc=org"
ldap user suffix = "ou=People,dc=etiantian,dc=org"
ldap group suffix = "ou=group,dc=etiantian,dc=org"
ldap delete dn = no
ldap passwd sync = yes
ldap ssl = no

[sambashare]
comment = share all
path = /app/log
browseable = yes
public = yes
writable = yes

[myshare]
comment = share for users
path = /application
browseable = yes
public = no
writable = yes

b.创建共享数据目录
[root@moban samba]# mkdir /app/log -p
[root@moban samba]# mkdir /application

提示:为了方便测试，先给目录777的权限

[root@moban samba]# chmod -R 777 /application

[root@moban samba]# chmod -R 777 /app/log

c.保存openldap的admin密码到samba中
提示:为了使samba能够访问ldap,把ldap管理员的密码保存到samba的secrets.tdb中(/var/lib/samba/private/secrets.tdb)
[root@moban samba]# smbpasswd -w 123456
Setting stored password for "cn=admin,dc=etiantian,dc=org" in secrets.tdb

d.在openldap中，添加samba测试用户
[root@moban openldap]# cat /etc/passwd|grep admin(系统用户)
admin:x:500:500::/home/admin:/bin/bash
[root@moban samba]# cd /etc/openldap/
[root@moban openldap]# vi /etc/samba/smbusers
在最下面加入samba用户
admin sambatest  #意思是说admin这个系统用户名有一个虚拟的SMB用户名:sambatest
[root@moban openldap]# vi sambauser.ldif
dn: uid=sambatest,ou=People,dc=etiantian,dc=org
objectClass: posixAccount
objectClass: top
objectClass: inetOrgPerson
objectClass: shadowAccount
gidNumber: 1009
givenName: sambatest
sn: sambatest
uid: sambatest
homeDirectory: /home/sambatest
loginShell: /bin/bash
shadowFlag: 0
shadowMin: 0
shadowMax: 99999
shadowWarning: 0
shadowInactive: 99999
shadowLastChange: 12011
shadowExpire: 99999
cn: sambatest
uidNumber: 24425
[root@moban openldap]# slapadd -l sambauser.ldif
58261bcf The first database does not allow slapadd; using the first available one (2)
_#################### 100.00% eta   none elapsed            none fast!         
Closing DB...

e.设置操作系统从ldap中验证用户
提示:设置系统如果没有从/etc/passwd中找到用户就去openldap中验证。
[root@moban openldap]# authconfig-tui
User Information
[*] Use LDAP
Authentication
[*] Use Fingerprint reader

┌─────────┤ LDAP Settings ├───────
│
│          [ ] Use TLS
│ Server: ldap://192.168.0.111/
│ Base DN: dc=etiantian,dc=org
[root@moban openldap]# grep "ldap" /etc/nsswitch.conf
passwd:     files ldap
shadow:     files ldap
group:      files ldap
netgroup:   files ldap
automount:  files ldap
[root@moban openldap]# tail -3 ldap.conf
URI ldap://192.168.0.111/
BASE dc=etiantian,dc=org
TLS_CACERTDIR /etc/openldap/cacerts
[root@moban openldap]# /etc/init.d/slapd start
[root@moban openldap]# /etc/init.d/smb start

f.测试从ldap中获取用户信息
[root@moban openldap]# id sambatest           
uid=24425(sambatest) gid=1009 groups=1009
[root@moban openldap]# grep "sambatest" /etc/passwd
备注:从passwd文件中找不到sambatest，说明sambatest是从ldap中获取的。

g.设置测试用户sambatest密码
[root@moban openldap]# smbpasswd -a sambatest
New SMB password:123456789
Retype new SMB password:123456789
Added user sambatest.

h.测试samba中sambatest用户能否登录
[root@moban openldap]# smbclient -U sambatest //192.168.0.111/sambashare
Enter sambatest's password:
Domain=[WORKGROUP] OS=[Unix] Server=[Samba 3.6.23-36.el6_8]
smb: \> ls
  .                                   D        0  Sat Nov  5 20:38:28 2016
  ..                                  D        0  Thu Oct 27 13:01:13 2016
  UM4SW7~D.LOG                        A       74  Thu Oct 27 19:29:01 2016
  U41Y9B~1.LOG                        A       85  Thu Oct 27 19:37:24 2016
  U0XZAY~G.LOG                        A      117  Thu Oct 27 19:18:40 2016
  UAKC5V~4.LOG                        A       99  Thu Oct 27 19:27:02 2016
  UO0D3H~P.LOG                        A        0  Sat Nov  5 20:38:28 2016
  U3DW4T~X.LOG                        A       48  Thu Oct 27 19:30:14 2016
                51760 blocks of size 524288. 45745 blocks available
smb: \>
[root@moban openldap]# smbclient -U sambatest //192.168.0.111/myshare
Enter sambatest's password:
Domain=[WORKGROUP] OS=[Unix] Server=[Samba 3.6.23-36.el6_8]
smb: \> ls
  .                                   D        0  Sat Nov  5 23:26:28 2016
  ..                                 DR        0  Fri Nov 11 22:26:21 2016
  svndata                             D        0  Thu Oct 27 01:48:57 2016
  新建 Microsoft Access 数据库.accdb      A   512000  Sat Nov  5 23:26:28 2016
  svnpasswd                           D        0  Sat Nov  5 21:02:06 2016

                51760 blocks of size 524288. 45745 blocks available
smb: \>
通过以上结果可以看到samba通过openldap验证访问正常，再看看windows的访问，如下图: