Added role to manage remote user authentication

roles/internal/ffdo.authentication/README.md

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+Role Name
+=========
+
+A brief description of the role goes here.
+
+Requirements
+------------
+
+Any pre-requisites that may not be covered by Ansible itself or the role should be mentioned here. For instance, if the role uses the EC2 module, it may be a good idea to mention in this section that the boto package is required.
+
+Role Variables
+--------------
+
+A description of the settable variables for this role should go here, including any variables that are in defaults/main.yml, vars/main.yml, and any variables that can/should be set via parameters to the role. Any variables that are read from other roles and/or the global scope (ie. hostvars, group vars, etc.) should be mentioned here as well.
+
+Dependencies
+------------
+
+A list of other roles hosted on Galaxy should go here, plus any details in regards to parameters that may need to be set for other roles, or variables that are used from other roles.
+
+Example Playbook
+----------------
+
+Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:
+
+    - hosts: servers
+      roles:
+         - { role: username.rolename, x: 42 }
+
+License
+-------
+
+BSD
+
+Author Information
+------------------
+
+An optional section for the role authors to include contact information, or a website (HTML is not allowed).

roles/internal/ffdo.authentication/defaults/main.yml

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+---
+# defaults file for ffdo.authentication

roles/internal/ffdo.authentication/handlers/main.yml

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+---
+# handlers file for ffdo.authentication
+
+- name: reload ssh
+  service: name=ssh state=reloaded

roles/internal/ffdo.authentication/meta/main.yml

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+---
+galaxy_info:
+  author: your name
+  description: 
+  company: your company (optional)
+  # If the issue tracker for your role is not on github, uncomment the
+  # next line and provide a value
+  # issue_tracker_url: http://example.com/issue/tracker
+  # Some suggested licenses:
+  # - BSD (default)
+  # - MIT
+  # - GPLv2
+  # - GPLv3
+  # - Apache
+  # - CC-BY
+  license: license (GPLv2, CC-BY, etc)
+  min_ansible_version: 1.2
+  #
+  # Below are all platforms currently available. Just uncomment
+  # the ones that apply to your role. If you don't see your 
+  # platform on this list, let us know and we'll get it added!
+  #
+  #platforms:
+  #- name: EL
+  #  versions:
+  #  - all
+  #  - 5
+  #  - 6
+  #  - 7
+  #- name: GenericUNIX
+  #  versions:
+  #  - all
+  #  - any
+  #- name: Fedora
+  #  versions:
+  #  - all
+  #  - 16
+  #  - 17
+  #  - 18
+  #  - 19
+  #  - 20
+  #  - 21
+  #  - 22
+  #- name: Windows
+  #  versions:
+  #  - all
+  #  - 2012R2
+  #- name: SmartOS
+  #  versions:
+  #  - all
+  #  - any
+  #- name: opensuse
+  #  versions:
+  #  - all
+  #  - 12.1
+  #  - 12.2
+  #  - 12.3
+  #  - 13.1
+  #  - 13.2
+  #- name: Amazon
+  #  versions:
+  #  - all
+  #  - 2013.03
+  #  - 2013.09
+  #- name: GenericBSD
+  #  versions:
+  #  - all
+  #  - any
+  #- name: FreeBSD
+  #  versions:
+  #  - all
+  #  - 8.0
+  #  - 8.1
+  #  - 8.2
+  #  - 8.3
+  #  - 8.4
+  #  - 9.0
+  #  - 9.1
+  #  - 9.1
+  #  - 9.2
+  #- name: Ubuntu
+  #  versions:
+  #  - all
+  #  - lucid
+  #  - maverick
+  #  - natty
+  #  - oneiric
+  #  - precise
+  #  - quantal
+  #  - raring
+  #  - saucy
+  #  - trusty
+  #  - utopic
+  #  - vivid
+  #- name: SLES
+  #  versions:
+  #  - all
+  #  - 10SP3
+  #  - 10SP4
+  #  - 11
+  #  - 11SP1
+  #  - 11SP2
+  #  - 11SP3
+  #- name: GenericLinux
+  #  versions:
+  #  - all
+  #  - any
+  #- name: Debian
+  #  versions:
+  #  - all
+  #  - etch
+  #  - jessie
+  #  - lenny
+  #  - squeeze
+  #  - wheezy
+  #
+  # Below are all categories currently available. Just as with
+  # the platforms above, uncomment those that apply to your role.
+  #
+  #categories:
+  #- cloud
+  #- cloud:ec2
+  #- cloud:gce
+  #- cloud:rax
+  #- clustering
+  #- database
+  #- database:nosql
+  #- database:sql
+  #- development
+  #- monitoring
+  #- networking
+  #- packaging
+  #- system
+  #- web
+dependencies: 
+- usermanage

roles/internal/ffdo.authentication/tasks/main.yml

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+---
+# tasks file for ffdo.authentication
+
+- name: Ensure sudo is installed
+  apt: name=sudo state=present
+
+- name: Ensure that sudo works without tty
+  lineinfile:
+    dest: "/etc/sudoers"
+    regexp: "^Defaults\\s+requiretty.*$"
+    line: "# Defaults    requiretty"
+    validate: 'visudo -cf %s'
+
+- name: Disable password based sudo for users in group sudo and enable password less sudo
+  lineinfile:
+    dest: "/etc/sudoers"
+    regexp: '^%sudo'
+    line: "%sudo ALL=(ALL) NOPASSWD: ALL"
+    validate: 'visudo -cf %s'
+
+- name: Update SSH configuration
+  replace: >
+    dest=/etc/ssh/sshd_config
+    regexp="^([\#\s]*)?{{item.key}}\s+([\w_-]+)"
+    replace="{{item.key}} {{item.value}}"
+    backup=yes
+  with_items:
+  - key: PermitRootLogin
+    value: without-password
+  - key: PasswordAuthentication
+    value: 'no'
+  - key: ChallengeResponseAuthentication
+    value: 'no'
+  - key: PrintLastLog
+    value: 'no'
+  notify:
+  - reload ssh

roles/internal/ffdo.authentication/vars/main.yml

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+---
+# vars file for ffdo.authentication