summaryrefslogtreecommitdiff
path: root/network/nxos/nxos_aaa_server.py
blob: 6b4f52ae4e3e3f28779dba1e9bf2b694b6ee8e2c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
#!/usr/bin/python
#
# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.
#

ANSIBLE_METADATA = {'status': ['preview'],
                    'supported_by': 'community',
                    'version': '1.0'}

DOCUMENTATION = '''
---

module: nxos_aaa_server
version_added: "2.2"
short_description: Manages AAA server global configuration.
description:
    - Manages AAA server global configuration
extends_documentation_fragment: nxos
author:
    - Jason Edelman (@jedelman8)
notes:
    - The server_type parameter is always required.
    - If encrypt_type is not supplied, the global AAA server key will be
      stored as encrypted (type 7).
    - Changes to the global AAA server key with encrypt_type=0
      are not idempotent.
    - If global AAA server key is not found, it's shown as "unknown"
    - state=default will set the supplied parameters to their default values.
      The parameters that you want to default must also be set to default.
      If global_key=default, the global key will be removed.
options:
    server_type:
        description:
            - The server type is either radius or tacacs.
        required: true
        choices: ['radius', 'tacacs']
    global_key:
        description:
            - Global AAA shared secret.
        required: false
        default: null
    encrypt_type:
        description:
            - The state of encryption applied to the entered global key.
              O clear text, 7 encrypted. Type-6 encryption is not supported.
        required: false
        default: null
        choices: ['0', '7']
    deadtime:
        description:
            - Duration for which a non-reachable AAA server is skipped,
              in minutes. Range is 1-1440. Device default is 0.
        required: false
        default: null
    server_timeout:
        description:
            - Global AAA server timeout period, in seconds. Range is 1-60.
              Device default is 5.
        required: false
        default: null
    directed_request:
        description:
            - Enables direct authentication requests to AAA server.
              Device default is disabled.
        required: false
        default: null
        choices: ['enabled', 'disabled']
    state:
        description:
            - Manage the state of the resource.
        required: true
        default: present
        choices: ['present','default']
'''

EXAMPLES = '''
# Radius Server Basic settings
  - name: "Radius Server Basic settings"
    nxos_aaa_server:
        server_type: radius
        server_timeout: 9
        deadtime: 20
        directed_request: enabled
        host:  inventory_hostname }}
        username:  un }}
        password:  pwd }}

# Tacacs Server Basic settings
  - name: "Tacacs Server Basic settings"
    nxos_aaa_server:
        server_type: tacacs
        server_timeout: 8
        deadtime: 19
        directed_request: disabled
        host:  inventory_hostname }}
        username:  un }}
        password:  pwd }}

# Setting Global Key
  - name: "AAA Server Global Key"
    nxos_aaa_server:
        server_type: radius
        global_key: test_key
        host:  inventory_hostname }}
        username:  un }}
        password:  pwd }}
'''

RETURN = '''
proposed:
    description: k/v pairs of parameters passed into module
    returned: always
    type: dict
    sample: {"deadtime": "22", "directed_request": "enabled",
            "server_type": "radius", "server_timeout": "11"}
existing:
    description:
        - k/v pairs of existing aaa server
    type: dict
    sample: {"deadtime": "0", "directed_request": "disabled",
            "global_key": "unknown", "server_timeout": "5"}
end_state:
    description: k/v pairs of aaa params after module execution
    returned: always
    type: dict
    sample: {"deadtime": "22", "directed_request": "enabled",
            "global_key": "unknown", "server_timeout": "11"}
state:
    description: state as sent in from the playbook
    returned: always
    type: string
    sample: "present"
updates:
    description: command sent to the device
    returned: always
    type: list
    sample: ["radius-server deadtime 22", "radius-server timeout 11",
             "radius-server directed-request"]
changed:
    description: check to see if a change was made on the device
    returned: always
    type: boolean
    sample: true
'''

import json

# COMMON CODE FOR MIGRATION
import re

from ansible.module_utils.basic import get_exception
from ansible.module_utils.netcfg import NetworkConfig, ConfigLine
from ansible.module_utils.shell import ShellError

try:
    from ansible.module_utils.nxos import get_module
except ImportError:
    from ansible.module_utils.nxos import NetworkModule


def to_list(val):
     if isinstance(val, (list, tuple)):
         return list(val)
     elif val is not None:
         return [val]
     else:
         return list()


class CustomNetworkConfig(NetworkConfig):

    def expand_section(self, configobj, S=None):
        if S is None:
            S = list()
        S.append(configobj)
        for child in configobj.children:
            if child in S:
                continue
            self.expand_section(child, S)
        return S

    def get_object(self, path):
        for item in self.items:
            if item.text == path[-1]:
                parents = [p.text for p in item.parents]
                if parents == path[:-1]:
                    return item

    def to_block(self, section):
        return '\n'.join([item.raw for item in section])

    def get_section(self, path):
        try:
            section = self.get_section_objects(path)
            return self.to_block(section)
        except ValueError:
            return list()

    def get_section_objects(self, path):
        if not isinstance(path, list):
            path = [path]
        obj = self.get_object(path)
        if not obj:
            raise ValueError('path does not exist in config')
        return self.expand_section(obj)


    def add(self, lines, parents=None):
        """Adds one or lines of configuration
        """

        ancestors = list()
        offset = 0
        obj = None

        ## global config command
        if not parents:
            for line in to_list(lines):
                item = ConfigLine(line)
                item.raw = line
                if item not in self.items:
                    self.items.append(item)

        else:
            for index, p in enumerate(parents):
                try:
                    i = index + 1
                    obj = self.get_section_objects(parents[:i])[0]
                    ancestors.append(obj)

                except ValueError:
                    # add parent to config
                    offset = index * self.indent
                    obj = ConfigLine(p)
                    obj.raw = p.rjust(len(p) + offset)
                    if ancestors:
                        obj.parents = list(ancestors)
                        ancestors[-1].children.append(obj)
                    self.items.append(obj)
                    ancestors.append(obj)

            # add child objects
            for line in to_list(lines):
                # check if child already exists
                for child in ancestors[-1].children:
                    if child.text == line:
                        break
                else:
                    offset = len(parents) * self.indent
                    item = ConfigLine(line)
                    item.raw = line.rjust(len(line) + offset)
                    item.parents = ancestors
                    ancestors[-1].children.append(item)
                    self.items.append(item)


def get_network_module(**kwargs):
    try:
        return get_module(**kwargs)
    except NameError:
        return NetworkModule(**kwargs)

def get_config(module, include_defaults=False):
    config = module.params['config']
    if not config:
        try:
            config = module.get_config()
        except AttributeError:
            defaults = module.params['include_defaults']
            config = module.config.get_config(include_defaults=defaults)
    return CustomNetworkConfig(indent=2, contents=config)

def load_config(module, candidate):
    config = get_config(module)

    commands = candidate.difference(config)
    commands = [str(c).strip() for c in commands]

    save_config = module.params['save']

    result = dict(changed=False)

    if commands:
        if not module.check_mode:
            try:
                module.configure(commands)
            except AttributeError:
                module.config(commands)

            if save_config:
                try:
                    module.config.save_config()
                except AttributeError:
                    module.execute(['copy running-config startup-config'])

        result['changed'] = True
        result['updates'] = commands

    return result
# END OF COMMON CODE


def execute_config_command(commands, module):
    try:
        module.configure(commands)
    except ShellError:
        clie = get_exception()
        module.fail_json(msg='Error sending CLI commands',
                         error=str(clie), commands=commands)
    except AttributeError:
        try:
            commands.insert(0, 'configure')
            module.cli.add_commands(commands, output='config')
            module.cli.run_commands()
        except ShellError:
            clie = get_exception()
            module.fail_json(msg='Error sending CLI commands',
                             error=str(clie), commands=commands)


def execute_show(cmds, module, command_type=None):
    command_type_map = {
        'cli_show': 'json',
        'cli_show_ascii': 'text'
    }

    try:
        if command_type:
            response = module.execute(cmds, command_type=command_type)
        else:
            response = module.execute(cmds)
    except ShellError:
        clie = get_exception()
        module.fail_json(msg='Error sending {0}'.format(cmds),
                         error=str(clie))
    except AttributeError:
        try:
            if command_type:
                command_type = command_type_map.get(command_type)
                module.cli.add_commands(cmds, output=command_type)
                response = module.cli.run_commands()
            else:
                module.cli.add_commands(cmds, raw=True)
                response = module.cli.run_commands()
        except ShellError:
            clie = get_exception()
            module.fail_json(msg='Error sending {0}'.format(cmds),
                             error=str(clie))
    return response


def execute_show_command(command, module, command_type='cli_show'):
    cmds = [command]
    if module.params['transport'] == 'cli':
        body = execute_show(cmds, module)
    elif module.params['transport'] == 'nxapi':
        body = execute_show(cmds, module, command_type=command_type)
    return body


def flatten_list(command_lists):
    flat_command_list = []
    for command in command_lists:
        if isinstance(command, list):
            flat_command_list.extend(command)
        else:
            flat_command_list.append(command)
    return flat_command_list



def get_aaa_server_info(server_type, module):
    aaa_server_info = {}
    server_command = 'show {0}-server'.format(server_type)
    request_command = 'show {0}-server directed-request'.format(server_type)
    global_key_command = 'show run | sec {0}'.format(server_type)
    aaa_regex = '.*{0}-server\skey\s\d\s+(?P<key>\S+).*'.format(server_type)

    server_body = execute_show_command(
                server_command, module, command_type='cli_show_ascii')[0]

    split_server = server_body.splitlines()

    for line in split_server:
        if line.startswith('timeout'):
            aaa_server_info['server_timeout'] = line.split(':')[1]

        elif line.startswith('deadtime'):
            aaa_server_info['deadtime'] = line.split(':')[1]

    request_body = execute_show_command(
                request_command, module, command_type='cli_show_ascii')[0]
    aaa_server_info['directed_request'] = request_body.replace('\n', '')

    key_body = execute_show_command(
                global_key_command, module, command_type='cli_show_ascii')[0]

    try:
        match_global_key = re.match(aaa_regex, key_body, re.DOTALL)
        group_key = match_global_key.groupdict()
        aaa_server_info['global_key'] = group_key["key"].replace('\"', '')
    except (AttributeError, TypeError):
        aaa_server_info['global_key'] = 'unknown'

    return aaa_server_info


def set_aaa_server_global_key(encrypt_type, key, server_type):
    if not encrypt_type:
        encrypt_type = ''
    return '{0}-server key {1} {2}'.format(
        server_type, encrypt_type, key)


def config_aaa_server(params, server_type):
    cmds = []

    deadtime = params.get('deadtime')
    server_timeout = params.get('server_timeout')
    directed_request = params.get('directed_request')
    encrypt_type = params.get('encrypt_type', '7')
    global_key = params.get('global_key')

    if deadtime is not None:
        cmds.append('{0}-server deadtime {1}'.format(server_type, deadtime))

    if server_timeout is not None:
        cmds.append('{0}-server timeout {1}'.format(server_type, server_timeout))

    if directed_request is not None:
        if directed_request == 'enabled':
            cmds.append('{0}-server directed-request'.format(server_type))
        elif directed_request == 'disabled':
            cmds.append('no {0}-server directed-request'.format(server_type))

    if global_key is not None:
        cmds.append('{0}-server key {1} {2}'.format(server_type, encrypt_type,
                                                    global_key))

    return cmds


def default_aaa_server(existing, params, server_type):
    cmds = []

    deadtime = params.get('deadtime')
    server_timeout = params.get('server_timeout')
    directed_request = params.get('directed_request')
    global_key = params.get('global_key')
    existing_key = existing.get('global_key')

    if deadtime is not None:
        cmds.append('no {0}-server deadtime 1'.format(server_type))

    if server_timeout is not None:
        cmds.append('no {0}-server timeout 1'.format(server_type))

    if directed_request is not None:
        cmds.append('no {0}-server directed-request'.format(server_type))

    if global_key is not None and existing_key is not None:
        cmds.append('no {0}-server key 7 {1}'.format(server_type, existing_key))

    return cmds


def main():
    argument_spec = dict(
            server_type=dict(type='str',
                             choices=['radius', 'tacacs'], required=True),
            global_key=dict(type='str'),
            encrypt_type=dict(type='str', choices=['0', '7']),
            deadtime=dict(type='str'),
            server_timeout=dict(type='str'),
            directed_request=dict(type='str',
                                  choices=['enabled', 'disabled', 'default']),
            state=dict(choices=['default', 'present'], default='present'),
    )
    module = get_network_module(argument_spec=argument_spec,
                                supports_check_mode=True)
    
    server_type = module.params['server_type']
    global_key = module.params['global_key']
    encrypt_type = module.params['encrypt_type']
    deadtime = module.params['deadtime']
    server_timeout = module.params['server_timeout']
    directed_request = module.params['directed_request']
    state = module.params['state']

    if encrypt_type and not global_key:
        module.fail_json(msg='encrypt_type must be used with global_key.')

    args = dict(server_type=server_type, global_key=global_key,
                encrypt_type=encrypt_type, deadtime=deadtime,
                server_timeout=server_timeout, directed_request=directed_request)

    changed = False
    proposed = dict((k, v) for k, v in args.iteritems() if v is not None)

    existing = get_aaa_server_info(server_type, module)
    end_state = existing

    commands = []
    if state == 'present':
        if deadtime:
            try:
                if int(deadtime) < 0 or int(deadtime) > 1440:
                    raise ValueError
            except ValueError:
                module.fail_json(
                        msg='deadtime must be an integer between 0 and 1440')

        if server_timeout:
            try:
                if int(server_timeout) < 1 or int(server_timeout) > 60:
                    raise ValueError
            except ValueError:
                module.fail_json(
                    msg='server_timeout must be an integer between 1 and 60')

        delta = dict(set(proposed.iteritems()).difference(
                                                    existing.iteritems()))
        if delta:
            command = config_aaa_server(delta, server_type)
            if command:
                commands.append(command)

    elif state == 'default':
        for key, value in proposed.iteritems():
            if key != 'server_type' and value != 'default':
                module.fail_json(
                    msg='Parameters must be set to "default"'
                        'when state=default')
        command = default_aaa_server(existing, proposed, server_type)
        if command:
            commands.append(command)

    cmds = flatten_list(commands)
    if cmds:
        if module.check_mode:
            module.exit_json(changed=True, commands=cmds)
        else:
            changed = True
            execute_config_command(cmds, module)
            end_state = get_aaa_server_info(server_type, module)
            if 'configure' in cmds:
                cmds.pop(0)

    results = {}
    results['proposed'] = proposed
    results['existing'] = existing
    results['updates'] = cmds
    results['changed'] = changed
    results['end_state'] = end_state

    module.exit_json(**results)


if __name__ == '__main__':
    main()