## Install and configure krb5-kdc-ldap (if not done yet),
##  run most tasks only on krb5-kdc-ldap installation.
---
- fail: msg="The machine's domain must not be empty."
  when: ansible_domain | length == 0

- name: check if slapd is already there
  stat: path=/usr/sbin/krb5kdc
  register: krb5kdc

- name: prepare krb5.conf
  template:
    src: krb5.conf.j2
    dest: /etc/krb5.conf

- name: make sure krb5kdc exists
  file: path=/etc/krb5kdc state=directory recurse=yes

- name: prepare kdc.conf
  template:
    src: kdc.conf.j2
    dest: /etc/krb5kdc/kdc.conf

- name: prepare kadm5.acl
  template:
    src: kadm5.acl.j2
    dest: /etc/krb5kdc/kadm5.acl
  notify: "restart krb5-admin-server"

- name: install krb5-kdc-ldap and krb5-admin-server
  apt:
    name:
      - krb5-kdc-ldap
      - krb5-admin-server
    state: latest

- name: prepare kerberos.openldap.ldif
  shell: gunzip -c /usr/share/doc/krb5-kdc-ldap/kerberos.openldap.ldif.gz > /etc/ldap/schema/kerberos.openldap.ldif
  when: not krb5kdc.stat.exists

- name: activate kerberos.openldap.ldif schema
  command: ldapadd  -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/kerberos.openldap.ldif
  when: not krb5kdc.stat.exists

- name: make sure we have a kerberos container
  ldap_entry:
    dn: "cn=kerberos,{{ basedn }}"
    objectClass: krbContainer
    bind_dn: "cn=admin,{{ basedn }}"
    bind_pw: "{{ ldap_admin_pwd }}"
  when: not krb5kdc.stat.exists

- name: make sure we have a kdc object
  ldap_entry:
    dn: "cn=kdc,cn=kerberos,{{ basedn }}"
    objectClass:
      - organizationalRole
      - simpleSecurityObject
    attributes:
      userPassword: "{{ kdc_service_pwd }}"
    bind_dn: "cn=admin,{{ basedn }}"
    bind_pw: "{{ ldap_admin_pwd }}"
  when: not krb5kdc.stat.exists

- name: make sure we have a kadmin object
  ldap_entry:
    dn: "cn=kadmin,cn=kerberos,{{ basedn }}"
    objectClass:
      - organizationalRole
      - simpleSecurityObject
    attributes:
      userPassword: "{{ kadmin_service_pwd }}"
    bind_dn: "cn=admin,{{ basedn }}"
    bind_pw: "{{ ldap_admin_pwd }}"
  when: not krb5kdc.stat.exists

- name: modify ACLs to account for KDC
  ldap_attr:
    dn: "olcDatabase={1}mdb,cn=config"
    name: olcAccess
    values:
      - >-
        to attrs=userPassword
        by self write
        by anonymous auth
        by * none
      - >-
        to attrs=shadowLastChange
        by self write
        by * read
      - >-
        to dn.subtree="cn=kerberos,{{ basedn }}"
        by dn.exact="cn=kdc,cn=kerberos,{{ basedn }}" read
        by dn.exact="cn=kadmin,cn=kerberos,{{ basedn }}" write
        by * none
      - >-
        to attrs=krbPrincipalName,krbLastPwdChange,krbPrincipalKey,krbExtraData
        by dn.exact="cn=kdc,cn=kerberos,{{ basedn }}" read
        by dn.exact="cn=kadmin,cn=kerberos,{{ basedn }}" write
        by self read
        by * auth
      - >-
        to *
        by dn.exact="cn=kadmin,cn=kerberos,{{ basedn }}" write
        by * read
    state: exact
  when: not krb5kdc.stat.exists

- name: add KDC indexes to LDAP
  ldap_attr:
    dn: "olcDatabase={1}mdb,cn=config"
    name: olcDbIndex
    values: krbPrincipalName pres,sub,eq
  when: not krb5kdc.stat.exists

- name: prepare password for kdc
  shell: echo "cn=kdc,cn=kerberos,{{ basedn }}#{HEX}$(echo -n {{ kdc_service_pwd }} | xxd -g0 -ps | sed 's/0a$//')" > /etc/krb5kdc/service.keyfile
  no_log: true
  when: not krb5kdc.stat.exists

- name: prepare password for kadmin
  shell: echo "cn=kadmin,cn=kerberos,{{ basedn }}#{HEX}$(echo -n {{ kadmin_service_pwd }} | xxd -g0 -ps | sed 's/0a$//')" >> /etc/krb5kdc/service.keyfile
  no_log: true
  when: not krb5kdc.stat.exists

- name: dump kdc master password
  shell: echo -n "{{ kdc_master_pwd }}" > "{{ kdc_master_pwd_file }}" ; chmod 0600 "{{ kdc_master_pwd_file }}"
  no_log: true
  when: not krb5kdc.stat.exists

- name: initialize KDC
  command:
    >-
      kdb5_ldap_util
      -D cn=admin,"{{ basedn }}"
      -w "{{ ldap_admin_pwd }}"
      -H ldapi:///
      create -s -subtrees "{{ basedn }}"
      -P "{{ kdc_master_pwd }}"
      -r "{{ ansible_domain | upper }}"
  no_log: true
  notify: "restart krb5-kdc"
  when: not krb5kdc.stat.exists

- name: add root/admin as kadmin
  command: kadmin.local -q 'addprinc -pw "{{ kadmin_pwd }}" root/admin'
  when: not krb5kdc.stat.exists

- name: dump kadmin password
  shell: echo -n "{{ kadmin_pwd }}" > "{{ kadmin_pwd_file }}" ; chmod 0600 "{{ kadmin_pwd_file }}"
  no_log: true
  when: not krb5kdc.stat.exists

- name: add default policy to silence warning when using kadmin
  command: kadmin.local -q "add_policy default"
  when: not krb5kdc.stat.exists

- name: create machine principals
  command: kadmin.local -q 'addprinc -randkey {{ item }}/{{ ansible_hostname }}.{{ ansible_domain }}'
  with_items:
    - host
    - ldap
  when: not krb5kdc.stat.exists

- name: add principal to the keytab
  command: kadmin.local -q 'ktadd {{ item }}/{{ ansible_hostname }}.{{ ansible_domain }}'
  with_items:
    - host
    - ldap
  when: not krb5kdc.stat.exists

##############

- name: kerberize dummy user foo
  command: kadmin.local -q 'add_principal -pw "{{ foo_pwd }}" -x dn="uid=foo,ou=people,{{ basedn }}" foo'
  register: kerberize_result
  changed_when: kerberize_result.stderr is not search('already exists while creating')
  no_log: true
  when: foo_pwd is defined and foo_pwd | length > 0