Documentation

pamd – Manage PAM Modules

New in version 2.3.

Synopsis

  • Edit PAM service’s type, control, module path and module arguments. In order for a PAM rule to be modified, the type, control and module_path must match an existing rule. See man(5) pam.d for details.

Parameters

Parameter Choices/Defaults Comments
backup
boolean
added in 2.6
    Choices:
  • no ←
  • yes
Create a backup file including the timestamp information so you can get the original file back if you somehow clobbered it incorrectly.
control
- / required
The control of the PAM rule being modified. This may be a complicated control with brackets. If this is the case, be sure to put "[bracketed controls]" in quotes. The type, control and module_path all must match a rule to be modified.
module_arguments
-
When state is 'updated', the module_arguments will replace existing module_arguments. When state is 'args_absent' args matching those listed in module_arguments will be removed. When state is 'args_present' any args listed in module_arguments are added if missing from the existing rule. Furthermore, if the module argument takes a value denoted by '=', the value will be changed to that specified in module_arguments. Note that module_arguments is a list. Please see the examples for usage.
module_path
- / required
The module path of the PAM rule being modified. The type, control and module_path all must match a rule to be modified.
name
- / required
The name generally refers to the PAM service file to change, for example system-auth.
new_control
-
The new control to assign to the new rule.
new_module_path
-
The new module path to be assigned to the new rule.
new_type
-
The new type to assign to the new rule.
path
-
Default:
/etc/pam.d/
This is the path to the PAM service files
state
-
    Choices:
  • updated ←
  • before
  • after
  • args_present
  • args_absent
  • absent
The default of 'updated' will modify an existing rule if type, control and module_path all match an existing rule. With 'before', the new rule will be inserted before a rule matching type, control and module_path. Similarly, with 'after', the new rule will be inserted after an existing rule matching type, control and module_path. With either 'before' or 'after' new_type, new_control, and new_module_path must all be specified. If state is 'args_absent' or 'args_present', new_type, new_control, and new_module_path will be ignored. State 'absent' will remove the rule. The 'absent' state was added in version 2.4 and is only available in Ansible versions >= 2.4.
type
- / required
The type of the PAM rule being modified. The type, control and module_path all must match a rule to be modified.

Examples

- name: Update pamd rule's control in /etc/pam.d/system-auth
  pamd:
    name: system-auth
    type: auth
    control: required
    module_path: pam_faillock.so
    new_control: sufficient

- name: Update pamd rule's complex control in /etc/pam.d/system-auth
  pamd:
    name: system-auth
    type: session
    control: '[success=1 default=ignore]'
    module_path: pam_succeed_if.so
    new_control: '[success=2 default=ignore]'

- name: Insert a new rule before an existing rule
  pamd:
    name: system-auth
    type: auth
    control: required
    module_path: pam_faillock.so
    new_type: auth
    new_control: sufficient
    new_module_path: pam_faillock.so
    state: before

- name: Insert a new rule pam_wheel.so with argument 'use_uid' after an         existing rule pam_rootok.so
  pamd:
    name: su
    type: auth
    control: sufficient
    module_path: pam_rootok.so
    new_type: auth
    new_control: required
    new_module_path: pam_wheel.so
    module_arguments: 'use_uid'
    state: after

- name: Remove module arguments from an existing rule
  pamd:
    name: system-auth
    type: auth
    control: required
    module_path: pam_faillock.so
    module_arguments: ''
    state: updated

- name: Replace all module arguments in an existing rule
  pamd:
    name: system-auth
    type: auth
    control: required
    module_path: pam_faillock.so
    module_arguments: 'preauth
        silent
        deny=3
        unlock_time=604800
        fail_interval=900'
    state: updated

- name: Remove specific arguments from a rule
  pamd:
    name: system-auth
    type: session
    control: '[success=1 default=ignore]'
    module_path: pam_succeed_if.so
    module_arguments: crond,quiet
    state: args_absent

- name: Ensure specific arguments are present in a rule
  pamd:
    name: system-auth
    type: session
    control: '[success=1 default=ignore]'
    module_path: pam_succeed_if.so
    module_arguments: crond,quiet
    state: args_present

- name: Ensure specific arguments are present in a rule (alternative)
  pamd:
    name: system-auth
    type: session
    control: '[success=1 default=ignore]'
    module_path: pam_succeed_if.so
    module_arguments:
    - crond
    - quiet
    state: args_present

- name: Module arguments requiring commas must be listed as a Yaml list
  pamd:
    name: special-module
    type: account
    control: required
    module_path: pam_access.so
    module_arguments:
    - listsep=,
    state: args_present

- name: Update specific argument value in a rule
  pamd:
    name: system-auth
    type: auth
    control: required
    module_path: pam_faillock.so
    module_arguments: 'fail_interval=300'
    state: args_present

- name: Add pam common-auth rule for duo
  pamd:
    name: common-auth
    new_type: auth
    new_control: '[success=1 default=ignore]'
    new_module_path: '/lib64/security/pam_duo.so'
    state: after
    type: auth
    module_path: pam_sss.so
    control: 'requisite'

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
action
string
added in 2.4
always
That action that was taken and is one of: update_rule, insert_before_rule, insert_after_rule, args_present, args_absent, absent.

Sample:
update_rule
backupdest
string
added in 2.6
success
The file name of the backup file, if created.

change_count
integer
added in 2.4
success
How many rules were changed

Sample:
1
dest
string
success
Path to pam.d service that was changed. This is only available in Ansible version 2.3 and was removed in 2.4.

Sample:
/etc/pam.d/system-auth
new_rule
string
added in 2.4
success
The changes to the rule. This was available in Ansible version 2.4 and 2.5. It was removed in 2.6.

Sample:
None None None sha512 shadow try_first_pass use_authtok
updated_rule_(n)
string
added in 2.4
success
The rule(s) that was/were changed. This is only available in Ansible version 2.4 and was removed in 2.5.

Sample:
['password sufficient pam_unix.so sha512 shadow try_first_pass use_authtok']


Status

Authors

  • Kenneth D. Evensen (@kevensen)

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