#!/usr/bin/python

# -*- coding: utf-8 -*-

# Authors:

#   Thomas Woerner <twoerner@redhat.com>

#

# Copyright (C) 2019 Red Hat

# see file 'COPYING' for use and warranty information

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

ANSIBLE_METADATA = {

    "metadata_version": "1.0",

    "supported_by": "community",

    "status": ["preview"],

}

DOCUMENTATION = """

---

module: ipahbacrule

short description: Manage FreeIPA HBAC rules

description: Manage FreeIPA HBAC rules

options:

  ipaadmin_principal:

    description: The admin principal

    default: admin

  ipaadmin_password:

    description: The admin password

    required: false

  name:

    description: The hbacrule name

    required: true

    aliases: ["cn"]

  description:

    description: The hbacrule description

    required: false

  usercategory:

    description: User category the rule applies to

    required: false

    aliases: ["usercat"]

    choices: ["all", ""]

  hostcategory:

    description: Host category the rule applies to

    required: false

    aliases: ["hostcat"]

    choices: ["all", ""]

  servicecategory:

    description: Service category the rule applies to

    required: false

    aliases: ["servicecat"]

    choices: ["all", ""]

  nomembers:

    description: Suppress processing of membership attributes

    required: false

    type: bool

  host:

    description: List of host names assigned to this hbacrule.

    required: false

    type: list

  hostgroup:

    description: List of host groups assigned to this hbacrule.

    required: false

    type: list

  hbacsvc:

    description: List of HBAC service names assigned to this hbacrule.

    required: false

    type: list

  hbacsvcgroup:

    description: List of HBAC service names assigned to this hbacrule.

    required: false

    type: list

  user:

    description: List of user names assigned to this hbacrule.

    required: false

    type: list

  group:

    description: List of user groups assigned to this hbacrule.

    required: false

    type: list

  action:

    description: Work on hbacrule or member level

    default: hbacrule

    choices: ["member", "hbacrule"]

  state:

    description: State to ensure

    default: present

    choices: ["present", "absent", "enabled", "disabled"]

author:

    - Thomas Woerner

"""

EXAMPLES = """

# Ensure HBAC Rule allhosts is present

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: allhosts

    usercategory: all

# Ensure host server is present in HBAC Rule allhosts

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: allhosts

    host: server

    action: member

# Ensure HBAC Rule sshd-pinky is present

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: sshd-pinky

    hostcategory: all

# Ensure user pinky is present in HBAC Rule sshd-pinky

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: sshd-pinky

    user: pinky

    action: member

# Ensure HBAC service sshd is present in HBAC Rule sshd-pinky

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: sshd-pinky

    hbacsvc: sshd

    action: member

# Ensure HBAC Rule sshd-pinky is disabled

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: sshd-pinky

    state: disabled

# Ensure HBAC Rule sshd-pinky is enabled

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: sshd-pinky

    state: enabled

# Ensure HBAC Rule sshd-pinky is absent

- ipahbacrule:

    ipaadmin_password: SomeADMINpassword

    name: sshd-pinky

    state: absent

"""

RETURN = """

"""

from ansible.module_utils.basic import AnsibleModule

from ansible.module_utils.ansible_freeipa_module import temp_kinit, \

    temp_kdestroy, valid_creds, api_connect, api_command, compare_args_ipa, \

    module_params_get, gen_add_del_lists

def find_hbacrule(module, name):

    _args = {

        "all": True,

        "cn": name,

    }

    _result = api_command(module, "hbacrule_find", name, _args)

    if len(_result["result"]) > 1:

        module.fail_json(

            msg="There is more than one hbacrule '%s'" % (name))

    elif len(_result["result"]) == 1:

        return _result["result"][0]

    else:

        return None

def gen_args(description, usercategory, hostcategory, servicecategory,

             nomembers):

    _args = {}

    if description is not None:

        _args["description"] = description

    if usercategory is not None:

        _args["usercategory"] = usercategory

    if hostcategory is not None:

        _args["hostcategory"] = hostcategory

    if servicecategory is not None:

        _args["servicecategory"] = servicecategory

    if nomembers is not None:

        _args["nomembers"] = nomembers

    return _args

def main():

    ansible_module = AnsibleModule(

        argument_spec=dict(

            # general

            ipaadmin_principal=dict(type="str", default="admin"),

            ipaadmin_password=dict(type="str", required=False, no_log=True),

            name=dict(type="list", aliases=["cn"], default=None,

                      required=True),

            # present

            description=dict(type="str", default=None),

            usercategory=dict(type="str", default=None,

                              aliases=["usercat"], choices=["all", ""]),

            hostcategory=dict(type="str", default=None,

                              aliases=["hostcat"], choices=["all", ""]),

            servicecategory=dict(type="str", default=None,

                                 aliases=["servicecat"], choices=["all", ""]),

            nomembers=dict(required=False, type='bool', default=None),

            host=dict(required=False, type='list', default=None),

            hostgroup=dict(required=False, type='list', default=None),

            hbacsvc=dict(required=False, type='list', default=None),

            hbacsvcgroup=dict(required=False, type='list', default=None),

            user=dict(required=False, type='list', default=None),

            group=dict(required=False, type='list', default=None),

            action=dict(type="str", default="hbacrule",

                        choices=["member", "hbacrule"]),

            # state

            state=dict(type="str", default="present",

                       choices=["present", "absent",

                                "enabled", "disabled"]),

        ),

        supports_check_mode=True,

    )

    ansible_module._ansible_debug = True

    # Get parameters

    # general

    ipaadmin_principal = module_params_get(ansible_module,

                                           "ipaadmin_principal")

    ipaadmin_password = module_params_get(ansible_module, "ipaadmin_password")

    names = module_params_get(ansible_module, "name")

    # present

    description = module_params_get(ansible_module, "description")

    usercategory = module_params_get(ansible_module, "usercategory")

    hostcategory = module_params_get(ansible_module, "hostcategory")

    servicecategory = module_params_get(ansible_module, "servicecategory")

    nomembers = module_params_get(ansible_module, "nomembers")

    host = module_params_get(ansible_module, "host")

    hostgroup = module_params_get(ansible_module, "hostgroup")

    hbacsvc = module_params_get(ansible_module, "hbacsvc")

    hbacsvcgroup = module_params_get(ansible_module, "hbacsvcgroup")

    user = module_params_get(ansible_module, "user")

    group = module_params_get(ansible_module, "group")

    action = module_params_get(ansible_module, "action")

    # state

    state = module_params_get(ansible_module, "state")

    # Check parameters

    if state == "present":

        if len(names) != 1:

            ansible_module.fail_json(

                msg="Only one hbacrule can be added at a time.")

        if action == "member":

            invalid = ["description", "usercategory", "hostcategory",

                       "servicecategory", "nomembers"]

            for x in invalid:

                if vars()[x] is not None:

                    ansible_module.fail_json(

                        msg="Argument '%s' can not be used with action "

                        "'%s'" % (x, action))

        else:

            if hostcategory == 'all' and any([host, hostgroup]):

                ansible_module.fail_json(

                    msg="Hosts cannot be added when host category='all'")

            if usercategory == 'all' and any([user, group]):

                ansible_module.fail_json(

                    msg="Users cannot be added when user category='all'")

            if servicecategory == 'all' and any([hbacsvc, hbacsvcgroup]):

                ansible_module.fail_json(

                    msg="Services cannot be added when service category='all'")

    elif state == "absent":

        if len(names) < 1:

            ansible_module.fail_json(msg="No name given.")

        invalid = ["description", "usercategory", "hostcategory",

                   "servicecategory", "nomembers"]

        if action == "hbacrule":

            invalid.extend(["host", "hostgroup", "hbacsvc", "hbacsvcgroup",

                            "user", "group"])

        for x in invalid:

            if vars()[x] is not None:

                ansible_module.fail_json(

                    msg="Argument '%s' can not be used with state '%s'" %

                    (x, state))

    elif state in ["enabled", "disabled"]:

        if len(names) < 1:

            ansible_module.fail_json(msg="No name given.")

        if action == "member":

            ansible_module.fail_json(

                msg="Action member can not be used with states enabled and "

                "disabled")

        invalid = ["description", "usercategory", "hostcategory",

                   "servicecategory", "nomembers", "host", "hostgroup",

                   "hbacsvc", "hbacsvcgroup", "user", "group"]

        for x in invalid:

            if vars()[x] is not None:

                ansible_module.fail_json(

                    msg="Argument '%s' can not be used with state '%s'" %

                    (x, state))

    else:

        ansible_module.fail_json(msg="Invalid state '%s'" % state)

    # Init

    changed = False

    exit_args = {}

    ccache_dir = None

    ccache_name = None

    try:

        if not valid_creds(ansible_module, ipaadmin_principal):

            ccache_dir, ccache_name = temp_kinit(ipaadmin_principal,

                                                 ipaadmin_password)

        api_connect()

        commands = []

        for name in names:

            # Make sure hbacrule exists

            res_find = find_hbacrule(ansible_module, name)

            # Create command

            if state == "present":

                # Generate args

                args = gen_args(description, usercategory, hostcategory,

                                servicecategory, nomembers)

                if action == "hbacrule":

                    # Found the hbacrule

                    if res_find is not None:

                        # For all settings is args, check if there are

                        # different settings in the find result.

                        # If yes: modify

                        if not compare_args_ipa(ansible_module, args,

                                                res_find):

                            commands.append([name, "hbacrule_mod", args])

                    else:

                        commands.append([name, "hbacrule_add", args])

                        # Set res_find to empty dict for next step

                        res_find = {}

                    # Generate addition and removal lists

                    host_add, host_del = gen_add_del_lists(

                        host, res_find.get("memberhost_host"))

                    hostgroup_add, hostgroup_del = gen_add_del_lists(

                        hostgroup, res_find.get("memberhost_hostgroup"))

                    hbacsvc_add, hbacsvc_del = gen_add_del_lists(

                        hbacsvc, res_find.get("memberservice_hbacsvc"))

                    hbacsvcgroup_add, hbacsvcgroup_del = gen_add_del_lists(

                        hbacsvcgroup,

                        res_find.get("memberservice_hbacsvcgroup"))

                    user_add, user_del = gen_add_del_lists(

                        user, res_find.get("memberuser_user"))

                    group_add, group_del = gen_add_del_lists(

                        group, res_find.get("memberuser_group"))

                    # Add hosts and hostgroups

                    if len(host_add) > 0 or len(hostgroup_add) > 0:

                        commands.append([name, "hbacrule_add_host",

                                         {

                                             "host": host_add,

                                             "hostgroup": hostgroup_add,

                                         }])

                    # Remove hosts and hostgroups

                    if len(host_del) > 0 or len(hostgroup_del) > 0:

                        commands.append([name, "hbacrule_remove_host",

                                         {

                                             "host": host_del,

                                             "hostgroup": hostgroup_del,

                                         }])

                    # Add hbacsvcs and hbacsvcgroups

                    if len(hbacsvc_add) > 0 or len(hbacsvcgroup_add) > 0:

                        commands.append([name, "hbacrule_add_service",

                                         {

                                             "hbacsvc": hbacsvc_add,

                                             "hbacsvcgroup": hbacsvcgroup_add,

                                         }])

                    # Remove hbacsvcs and hbacsvcgroups

                    if len(hbacsvc_del) > 0 or len(hbacsvcgroup_del) > 0:

                        commands.append([name, "hbacrule_remove_service",

                                         {

                                             "hbacsvc": hbacsvc_del,

                                             "hbacsvcgroup": hbacsvcgroup_del,

                                         }])

                    # Add users and groups

                    if len(user_add) > 0 or len(group_add) > 0:

                        commands.append([name, "hbacrule_add_user",

                                         {

                                             "user": user_add,

                                             "group": group_add,

                                         }])

                    # Remove users and groups

                    if len(user_del) > 0 or len(group_del) > 0:

                        commands.append([name, "hbacrule_remove_user",

                                         {

                                             "user": user_del,

                                             "group": group_del,

                                         }])

                elif action == "member":

                    if res_find is None:

                        ansible_module.fail_json(msg="No hbacrule '%s'" % name)

                    # Add hosts and hostgroups

                    if host is not None or hostgroup is not None:

                        commands.append([name, "hbacrule_add_host",

                                         {

                                             "host": host,

                                             "hostgroup": hostgroup,

                                         }])

                    # Add hbacsvcs and hbacsvcgroups

                    if hbacsvc is not None or hbacsvcgroup is not None:

                        commands.append([name, "hbacrule_add_service",

                                         {

                                             "hbacsvc": hbacsvc,

                                             "hbacsvcgroup": hbacsvcgroup,

                                         }])

                    # Add users and groups

                    if user is not None or group is not None:

                        commands.append([name, "hbacrule_add_user",

                                         {

                                             "user": user,

                                             "group": group,

                                         }])

            elif state == "absent":

                if action == "hbacrule":

                    if res_find is not None:

                        commands.append([name, "hbacrule_del", {}])

                elif action == "member":

                    if res_find is None:

                        ansible_module.fail_json(msg="No hbacrule '%s'" % name)

                    # Remove hosts and hostgroups

                    if host is not None or hostgroup is not None:

                        commands.append([name, "hbacrule_remove_host",

                                         {

                                             "host": host,

                                             "hostgroup": hostgroup,

                                         }])

                    # Remove hbacsvcs and hbacsvcgroups

                    if hbacsvc is not None or hbacsvcgroup is not None:

                        commands.append([name, "hbacrule_remove_service",

                                         {

                                             "hbacsvc": hbacsvc,

                                             "hbacsvcgroup": hbacsvcgroup,

                                         }])

                    # Remove users and groups

                    if user is not None or group is not None:

                        commands.append([name, "hbacrule_remove_user",

                                         {

                                             "user": user,

                                             "group": group,

                                         }])

            elif state == "enabled":

                if res_find is None:

                    ansible_module.fail_json(msg="No hbacrule '%s'" % name)

                # hbacrule_enable is not failing on an enabled hbacrule

                # Therefore it is needed to have a look at the ipaenabledflag

                # in res_find.

                if "ipaenabledflag" not in res_find or \

                   res_find["ipaenabledflag"][0] != "TRUE":

                    commands.append([name, "hbacrule_enable", {}])

            elif state == "disabled":

                if res_find is None:

                    ansible_module.fail_json(msg="No hbacrule '%s'" % name)

                # hbacrule_disable is not failing on an disabled hbacrule

                # Therefore it is needed to have a look at the ipaenabledflag

                # in res_find.

                if "ipaenabledflag" not in res_find or \

                   res_find["ipaenabledflag"][0] != "FALSE":

                    commands.append([name, "hbacrule_disable", {}])

            else:

                ansible_module.fail_json(msg="Unkown state '%s'" % state)

        # Execute commands

        errors = []

        for name, command, args in commands:

            try:

                result = api_command(ansible_module, command, name,

                                     args)

                if "completed" in result:

                    if result["completed"] > 0:

                        changed = True

                else:

                    changed = True

            except Exception as e:

                ansible_module.fail_json(msg="%s: %s: %s" % (command, name,

                                                             str(e)))

            # Get all errors

            # All "already a member" and "not a member" failures in the

            # result are ignored. All others are reported.

            if "failed" in result and len(result["failed"]) > 0:

                for item in result["failed"]:

                    failed_item = result["failed"][item]

                    for member_type in failed_item:

                        for member, failure in failed_item[member_type]:

                            if "already a member" in failure \

                               or "not a member" in failure:

                                continue

                            errors.append("%s: %s %s: %s" % (

                                command, member_type, member, failure))

        if len(errors) > 0:

            ansible_module.fail_json(msg=", ".join(errors))

    except Exception as e:

        ansible_module.fail_json(msg=str(e))

    finally:

        temp_kdestroy(ccache_dir, ccache_name)

    # Done

    ansible_module.exit_json(changed=changed, **exit_args)

if __name__ == "__main__":

    main()