ldap_modify：更改密码时访问不足（50）

Question

我正在尝试在 CentOS 6.7（类似于 RHEL 6.7）上的全新 OpenLDAP 安装中修改 LDAP 管理员密码。

我创建了一个名为change_ldap_password.ldif：

# Hash your password:
# slappasswd -h {SSHA} -s "my_password"

# I also tried {1}hdb instead of {0}config
dn: olcDatabase={0}config,cn=config
changetype: modify
add: olcRootPW
olcRootPW: {SSHA}YP8q2haCD1POSzQC3GAuBdrfaHh+/Y49

当我以 root 身份运行以下命令时，出现访问错误：

# ldapmodify -x  -W -D "cn=admin,dc=my_domain,dc=com" -f ./change_ldap_password.ldif
Enter LDAP Password:
modifying entry "olcDatabase={0}config,cn=config"
ldap_modify: Insufficient access (50)

这是 ldapwhoami 的输出：

# ldapwhoami -x  -W -D "cn=admin,dc=my_domain,dc=com"
Enter LDAP Password:
dn:cn=admin,dc=my_domain,dc=com

这是在 cn=config 中对 olcRoot 进行 grepping 的结果：

# grep -R olcRoot /etc/openldap/slapd.d/cn=config
/etc/openldap/slapd.d/cn=config/olcDatabase={1}hdb.ldif:olcRootDN: cn=admin,dc=my_domain,dc=com
/etc/openldap/slapd.d/cn=config/olcDatabase={1}hdb.ldif:olcRootPW:: ...

这是 ldapmodify 的调试信息：

# ldapmodify -x  -W -D "cn=admin,dc=my_domain,dc=com" -f ./change_ldap_password.ldif -d1
ldap_create
Enter LDAP Password:
ldap_sasl_bind
ldap_send_initial_request
ldap_new_connection 1 1 0
ldap_int_open_connection
ldap_connect_to_host: TCP localhost:389
ldap_new_socket: 4
ldap_prepare_socket: 4
ldap_connect_to_host: Trying 127.0.0.1:389
ldap_pvt_connect: fd: 4 tm: -1 async: 0
attempting to connect:
connect errno: 111
ldap_close_socket: 4
ldap_int_open_connection
ldap_connect_to_path
ldap_new_socket: 4
ldap_connect_to_path: Trying /var/run/ldapi
ldap_connect_timeout: fd: 4 tm: -1 async: 0
ldap_ndelay_on: 4
ldap_close_socket: 4
ldap_int_open_connection
ldap_connect_to_host: TCP localhost:636
ldap_new_socket: 4
ldap_prepare_socket: 4
ldap_connect_to_host: Trying 127.0.0.1:636
ldap_pvt_connect: fd: 4 tm: -1 async: 0
attempting to connect:
connect success
TLS: certdb config: configDir='/etc/openldap/certs' tokenDescription='ldap(0)' certPrefix='' keyPrefix='' flags=readOnly
TLS: using moznss security dir /etc/openldap/certs prefix .
TLS: certificate [CN=my_server.my_domain.com] is valid
TLS certificate verification: subject: CN=my_server.my_domain.com, issuer: CN=my_server.my_domain.com, cipher: AES-256, security level: high, secret key bits: 256, total key bits: 256, cache hits: 0, cache misses: 0, cache not reusable: 0
ldap_open_defconn: successful
ldap_send_server_request
ber_scanf fmt ({it) ber:
ber_scanf fmt ({i) ber:
ber_flush2: 50 bytes to sd 4
ldap_result ld 0x184a340 msgid 1
wait4msg ld 0x184a340 msgid 1 (infinite timeout)
wait4msg continue ld 0x184a340 msgid 1 all 1
** ld 0x184a340 Connections:
* host: (null)  port: 636  (default)
  refcnt: 2  status: Connected
  last used: Fri Oct 30 14:04:24 2015


** ld 0x184a340 Outstanding Requests:
 * msgid 1,  origid 1, status InProgress
   outstanding referrals 0, parent count 0
  ld 0x184a340 request count 1 (abandoned 0)
** ld 0x184a340 Response Queue:
   Empty
  ld 0x184a340 response count 0
ldap_chkResponseList ld 0x184a340 msgid 1 all 1
ldap_chkResponseList returns ld 0x184a340 NULL
ldap_int_select
read1msg: ld 0x184a340 msgid 1 all 1
ber_get_next
ber_get_next: tag 0x30 len 12 contents:
read1msg: ld 0x184a340 msgid 1 message type bind
ber_scanf fmt ({eAA) ber:
read1msg: ld 0x184a340 0 new referrals
read1msg:  mark request completed, ld 0x184a340 msgid 1
request done: ld 0x184a340 msgid 1
res_errno: 0, res_error: <>, res_matched: <>
ldap_free_request (origid 1, msgid 1)
ldap_parse_result
ber_scanf fmt ({iAA) ber:
ber_scanf fmt (}) ber:
ldap_msgfree
modifying entry "olcDatabase={0}config,cn=config"
ldap_modify_ext
ldap_send_initial_request
ldap_send_server_request
ber_scanf fmt ({it) ber:
ber_scanf fmt ({) ber:
ber_flush2: 102 bytes to sd 4
ldap_result ld 0x184a340 msgid 2
wait4msg ld 0x184a340 msgid 2 (timeout 100000 usec)
wait4msg continue ld 0x184a340 msgid 2 all 1
** ld 0x184a340 Connections:
* host: (null)  port: 636  (default)
  refcnt: 2  status: Connected
  last used: Fri Oct 30 14:04:24 2015


** ld 0x184a340 Outstanding Requests:
 * msgid 2,  origid 2, status InProgress
   outstanding referrals 0, parent count 0
  ld 0x184a340 request count 1 (abandoned 0)
** ld 0x184a340 Response Queue:
   Empty
  ld 0x184a340 response count 0
ldap_chkResponseList ld 0x184a340 msgid 2 all 1
ldap_chkResponseList returns ld 0x184a340 NULL
ldap_int_select
read1msg: ld 0x184a340 msgid 2 all 1
ber_get_next
ber_get_next: tag 0x30 len 12 contents:
read1msg: ld 0x184a340 msgid 2 message type modify
ber_scanf fmt ({eAA) ber:
read1msg: ld 0x184a340 0 new referrals
read1msg:  mark request completed, ld 0x184a340 msgid 2
request done: ld 0x184a340 msgid 2
res_errno: 50, res_error: <>, res_matched: <>
ldap_free_request (origid 2, msgid 2)
ldap_parse_result
ber_scanf fmt ({iAA) ber:
ber_scanf fmt (}) ber:
ldap_msgfree
ldap_err2string
ldap_modify: Insufficient access (50)

ldap_free_connection 1 1
ldap_send_unbind
ber_flush2: 7 bytes to sd 4
ldap_free_connection: actually freed

如果我输入了错误的密码，错误将从 Insufficient Access 更改为 Invalid Credentials：

ldap_bind: Invalid credentials (49)

我看到了这个 ServerFault question，但那个问题是关于权限有限的用户，而不是管理员或 root。

我如何克服ldap_modify: Insufficient access (50)错误？

为什么识别为 LDAP 管理员的 root 无权更改密码？

如果这是推荐的解决方案，我可以重新安装 slapd。我想在进一步移动之前解决这个错误。

编辑：转到 ldapi:/// 上的 cn=config 会出现以下错误：

# ldapsearch -H ldapi:/// -Y EXTERNAL -b 'cn=config' -d1
ldap_url_parse_ext(ldapi:///)
ldap_create
ldap_url_parse_ext(ldapi:///??base)
ldap_sasl_interactive_bind: user selected: EXTERNAL
ldap_int_sasl_bind: EXTERNAL
ldap_new_connection 1 1 0
ldap_int_open_connection
ldap_connect_to_path
ldap_new_socket: 3
ldap_connect_to_path: Trying /var/run/ldapi
ldap_connect_timeout: fd: 3 tm: -1 async: 0
ldap_ndelay_on: 3
ldap_close_socket: 3
ldap_msgfree
ldap_err2string
ldap_sasl_interactive_bind_s: Can't contact LDAP server (-1)

我想我已经ldapi://定义了/etc/openldap/ldap.conf，但我不确定ldapi:///

#
# LDAP Defaults
#

# See ldap.conf(5) for details
# This file should be world readable but not world writable.

BASE    dc=my_domain,dc=com
#URI    ldap://ldap.example.com ldap://ldap-master.example.com:666
URI     ldap:// ldapi:// ldaps://

#SIZELIMIT  12
#TIMELIMIT  15
#DEREF          never

TLS_CACERTDIR /etc/openldap/certs

编辑 2：我ldap_sasl_interactive_bind_s: Can't contact LDAP server (-1)在停止防火墙 ( service iptables stop)后得到同样的错误，所以防火墙不是问题。

Answer 1

为了管理“cn=config”数据库，您需要“cn=config”管理员，而不是数据数据库的管理员。在 debian 中，此类管理员是具有 SASL TLS External 的 root。尝试

sudo ldapsearch -H ldapi:/// -Y EXTERNAL -b 'cn=config'

一旦您确认上述工作，您可以更改密码。首先，散列值：

slappasswd -h {SSHA} -s "my_password"

然后，将散列值粘贴到 ldif 文件中，例如./change_ldap_password.ldif：

dn: olcDatabase={0}config,cn=config
changetype: modify
add: olcRootPW
olcRootPW: {SSHA}cZbRoOhRew8MBiWGSEOiFX0XqbAQwXUr

最后，应用 ldif 文件：

sudo ldapmodify -H ldapi:/// -Y EXTERNAL -D 'cn=config' -f ./change_ldap_password.ldif

ldapmodify不鼓励更改密码。如果用户存在（不是这种情况），ldappasswd那就更好了。