Crear script Python para llamadas API Rest a FDM

Introducción

Este documento describe un ejemplo del uso de Python para realizar llamadas API Rest.

Prerequisites

Las herramientas y dispositivos utilizados en la guía son:

• Cisco Firepower Threat Defence (FTD)
• Administración de dispositivos Cisco Firepower (FDM)
• SO Mac
• Texto sublime

Requirements

Cisco recomienda que tenga conocimiento sobre estos temas:

• HTTPS
• API Rest
• Python
• Json
• Administración de dispositivos Firepower
• LDAP

Componentes Utilizados

La información que contiene este documento se basa en las siguientes versiones de software y hardware.

• Python 3.1.4
• API de FDM versión 6
• FTDv 7.3.1 

La información que contiene este documento se creó a partir de los dispositivos en un ambiente de laboratorio específico. Todos los dispositivos que se utilizan en este documento se pusieron en funcionamiento con una configuración verificada (predeterminada). Si tiene una red en vivo, asegúrese de entender el posible impacto de cualquier comando.

Antecedentes

La intención principal de este documento es guiarle a través de los pasos para crear un script Python para realizar llamadas API.

La característica específica que se debe ajustar y crear es LDAP y mapas de atributos.

Las llamadas a la API realizadas en la guía son: 

GET: recopila información del servidor

POST: Crear un nuevo objeto en el servidor

PUT: actualizar un objeto existente en el servidor

ELIMINAR: elimina un objeto existente del servidor

Configurar

GET

Ejemplo GET de API Rest para recopilar datos sobre objetos existentes:

import requests
import json
import certifi
import urllib3
from pprint import pprint
from getpass import getpass

urllib3.disable_warnings() 

#Data collection
u = input ('Input username: ')
p = getpass(prompt='Input password: ')
url = input('Input Hostname or IP address: ')
protocol = 'https://'

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
def auth():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  payload = {
        'grant_type' : 'password',
        'username' : u,
        'password': p
        }

  response = requests.post(token_url, data=payload, verify=False)
  
  #ONlY USE "verify=False" in a lab setting!

#Error Checking
  if response.status_code == 400:
    raise Exception("Error Received: {}".format(response.content))
  else:
    access_token = response.json()['access_token']
    return access_token

token = auth()
#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def getactivedirectory():
  uri = "/api/fdm/v6/object/realms"
  ad_url = protocol+url+uri

  headers = {
    "Content-Type": "application/json",
    "Accept": "application/json",
    "Authorization":"Bearer {}".format(token)
  }

  response = requests.get(ad_url, headers=headers, verify=False)
  if response.status_code == 200:
    AD = response.json()
    return AD
  else:
    print(response.status_code)
    pass
  

pprint(getactivedirectory())

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def revoke():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  headers = {
      "Content-Type": "application/json",
      "Accept": "application/json",
      "Authorization":"Bearer"
  }
  payload = {
        'grant_type' : 'revoke_token',
        "access_token": token,
        "token_to_revoke": token,
        }

  response = requests.post(token_url, data=payload, verify=False)
  if response.status_code == 200:
    print("Access token revoked")
  else:
    print(response.status_code)


revoke()

POST

Esta sección describe un ejemplo de realización de una solicitud POST de API REST para crear un nuevo objeto de mapa de atributo LDAP:

import requests
import json
import certifi
import urllib3
from pprint import pprint
from getpass import getpass

urllib3.disable_warnings() 

#Data collection
u = input ('Input username: ')
p = getpass(prompt='Input password: ')
url = input('Input Hostname or IP address: ')
protocol = 'https://'

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
def auth():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  payload = {
        'grant_type' : 'password',
        'username' : u,
        'password': p
        }

  response = requests.post(token_url, data=payload, verify=False)
  
  #WARNING ONLY USE "verify=False" in a lab setting!

#Error Checking
  if response.status_code == 400:
    raise Exception("Error Received: {}".format(response.content))
  else:
    access_token = response.json()['access_token']
    return access_token

token = auth()

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
def postattributemap():
  uri = "/api/fdm/v6/object/ldapattributemaps"
  ad_url = protocol+url+uri


  name = input('Object name> ')
  group_policy = input('Group-Policy> ')
  base = input('LDAP DN> ')

  headers = {
    "Content-Type": "application/json",
    "Accept": "application/json",
    "Authorization":"Bearer {}".format(token)
  }

  payload = {
  "name": name,
  "ldapAttributeMaps": [
    {
      "ldapName": "memberOf",
      "ciscoName": "GROUP_POLICY",
      "valueMappings": [
        {
          "ldapValue": base,
          "ciscoValue": group_policy,
          "type": "ldaptociscovaluemapping"
        }
      ],
      "type": "ldapattributemapping"
    }
  ],
    "type": "ldapattributemap"
  }
  data = json.dumps(payload)

  response = requests.post(ad_url, headers=headers, data=data, verify=False)

  if response.status_code == 200:
    print(response.status_code)
    print("Created LDAP attribute map")
    map = response.json
    return map
  else:
    print(response.status_code)
    pprint(response.content)
    pass



postattributemap()



#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def revoke():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  headers = {
      "Content-Type": "application/json",
      "Accept": "application/json",
      "Authorization":"Bearer"
  }
  payload = {
        'grant_type' : 'revoke_token',
        "access_token": token,
        "token_to_revoke": token,
        }

  response = requests.post(token_url, data=payload, verify=False)
  if response.status_code == 200:
    print("Access token revoked")
  else:
    print(response.status_code)


revoke()

PUT

Esta sección muestra un ejemplo de un script Python que realiza una llamada a la API PUT Rest. Esta función agrega el mapa de atributos LDAP a las configuraciones existentes de Active Directory.

import requests
import json
import certifi
import urllib3
from pprint import pprint
from getpass import getpass

urllib3.disable_warnings() 

#Data collection
u = input ('Input username: ')
p = getpass(prompt='Input password: ')
url = input('Input Hostname or IP address: ')
protocol = 'https://'

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
def auth():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  payload = {
        'grant_type' : 'password',
        'username' : u,
        'password': p
        }

  response = requests.post(token_url, data=payload, verify=False)
  
  #WARNING ONLY USE "verify=False" in a lab setting!

#Error Checking
  if response.status_code == 400:
    raise Exception("Error Received: {}".format(response.content))
  else:
    access_token = response.json()['access_token']
    return access_token

token = auth()
#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def put():
  objId = input('object id of active directory object> ')
  uri = "/api/fdm/v6/object/realms/"
  ad_url = protocol+url+uri+objId

  headers = {
    "Content-Type": "application/json",
    "Accept": "application/json",
    "Authorization":"Bearer {}".format(token)
  }
#Place the GET response from the active directory here in "payload" along with the added "ldapAttributeMap", "id" and ""type": "ldapattributemap"" 
  payload = {
  "version": "p6ueo2w2aulkf",
  "name": "Test",
  "directoryConfigurations": [
    {
      "hostname": "{omitted}",
      "port": 389,
      "encryptionProtocol": "NONE",
      "encryptionCert": None,
      "interface": { 
        "version": "mjvylmnd52agk",
        "name": "diagnostic",
        "hardwareName": "Management0/0",
        "id": "a46ef70c-06ca-11ee-9be1-bd712e622992",
        "type": "physicalinterface"
      },
      "type": "directoryconfiguration"
    }
  ],
  "enabled": True,
  "realmId": 3,
  "dirUsername": "{omitted}",
  "dirPassword": "*********",
  "baseDN": "dc={omitted},dc=com",
  "ldapAttributeMap": {
    "id": "7fbf5798-27c9-11ee-a635-a1f4b2c2e66b",
    "type": "ldapattributemap"
  },
  "adPrimaryDomain": "{omitted}.com",
  "id": "5957a304-2662-11ee-a635-a5df7d28e8c4",
  "type": "activedirectoryrealm"
  }

  data = json.dumps(payload)


  response = requests.put(ad_url, headers=headers, data=data, verify=False)

  if response.status_code == 200:
    print("Updated Object")
  else:
    pprint("Error Received: {}".format(response.content))
    pass

put()



#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def revoke():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  headers = {
      "Content-Type": "application/json",
      "Accept": "application/json",
      "Authorization":"Bearer"
  }
  payload = {
        'grant_type' : 'revoke_token',
        "access_token": token,
        "token_to_revoke": token,
        }

  response = requests.post(token_url, data=payload, verify=False)

  if response.status_code == 200:
    print("Access token revoked")
  else:
    print(response.status_code)


revoke()

BORRAR

En esta sección se describe un ejemplo de Rest API DELETE para quitar el objeto de Active Directory:

import requests
import json
import certifi
import urllib3
from pprint import pprint
from getpass import getpass

urllib3.disable_warnings() 

#Data collection
u = input ('Input username: ')
p = getpass(prompt='Input password: ')
url = input('Input Hostname or IP address: ')
protocol = 'https://'
 
#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
def auth():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  payload = {
        'grant_type' : 'password',
        'username' : u,
        'password': p
        }

  response = requests.post(token_url, data=payload, verify=False)
  
  #ONlY USE "verify=False" in a lab setting!

#Error Checking
  if response.status_code == 400:
    raise Exception("Error Received: {}".format(response.content))
  else:
    access_token = response.json()['access_token']
    return access_token

token = auth()
#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def delete():
  objId = input('object id to delete> ')
  uri = "/api/fdm/v6/object/realms/"
  ad_url = protocol+url+uri+objId


  headers = {
    "Content-Type": "application/json",
    "Accept": "application/json",
    "Authorization":"Bearer {}".format(token)
  }

  response = requests.delete(ad_url, headers=headers, verify=False)

  
  if response.status_code == 204:
    print('Object removed')
  else:
    print("Error Received: {}".format(response.content))
    pass

delete()

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def revoke():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  headers = {
      "Content-Type": "application/json",
      "Accept": "application/json",
      "Authorization":"Bearer"
  }
  payload = {
        'grant_type' : 'revoke_token',
        "access_token": token,
        "token_to_revoke": token,
        }

  response = requests.post(token_url, data=payload, verify=False)

  if response.status_code == 200:
    print("Access token revoked")
  else:
    print(response.status_code)


revoke()

IMPLEMENTACIÓN

En esta sección se describe un ejemplo de implementación de cambios de configuración mediante una llamada a la API POST-REST y confirmación del estado de implementaciones con una solicitud GET.

import requests
import json
import certifi
import urllib3
from pprint import pprint
from getpass import getpass

urllib3.disable_warnings() 

#Data collection
u = input ('Input username: ')
p = getpass(prompt='Input password: ')
url = input('Input Hostname or IP address: ')
protocol = 'https://'
 

x="0"
attempts=0


#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
def auth():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  payload = {
        'grant_type' : 'password',
        'username' : u,
        'password': p
        }

  response = requests.post(token_url, data=payload, verify=False)
  
  #ONlY USE "verify=False" in a lab setting!

#Error Checking
  if response.status_code == 400:
    raise Exception("Error Received: {}".format(response.content))
  else:
    access_token = response.json()['access_token']
    return access_token


token = auth()

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


def deploy():

  uri = '/api/fdm/v6/operational/deploy'
  deploy = protocol+url+uri

  headers = headers = {
    "Content-Type": "application/json",
    "Accept": "application/json",
    "Authorization":"Bearer {}".format(token)
  }

  payload = {
  "statusMessage": "string",
  "cliErrorMessage": "string",
  "state": "QUEUED",
  "queuedTime": 0,
  "startTime": 0,
  "endTime": 0,
  "statusMessages": [
    "string"
    ],
  "id": "string",
  "name": "string",
  "modifiedObjects": {},
  "forceRefreshDeploymentData": False,
  "type": "deploymentstatus"
  }

  data = json.dumps(payload)

  response = requests.get(deploy, headers=headers, data=data,verify=False)
  if response.status_code == 200:
    print(response.status_code)
    status = response.json()['items'][0]['statusMessage']
    return status
  else:
    print(response.status_code)
    pass
    
status = deploy()

#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


def deploy2():

  uri = '/api/fdm/v6/operational/deploy'
  deploy = protocol+url+uri

  headers = headers = {
    "Content-Type": "application/json",
    "Accept": "application/json",
    "Authorization":"Bearer {}".format(token)
  }

  payload = {
  "statusMessage": "string",
  "cliErrorMessage": "string",
  "state": "QUEUED",
  "queuedTime": 0,
  "startTime": 0,
  "endTime": 0,
  "statusMessages": [
    "string"
    ],
  "id": "string",
  "name": "string",
  "modifiedObjects": {},
  "forceRefreshDeploymentData": False,
  "type": "deploymentstatus"
  }

  data = json.dumps(payload)

  response = requests.post(deploy, headers=headers, data=data,verify=False)
  if response.status_code == 200:
    print(response.status_code)
    print('Deploying')
  else:
    print(response.status_code)
    pass





#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

def revoke():

  uri = '/api/fdm/v6/fdm/token'
  token_url = protocol+url+uri

  headers = {
      "Content-Type": "application/json",
      "Accept": "application/json",
      "Authorization":"Bearer"
  }
  payload = {
        'grant_type' : 'revoke_token',
        "access_token": token,
        "token_to_revoke": token,
        }

  response = requests.post(token_url, data=payload, verify=False)
  if response.status_code == 200:
    print("Access token revoked")
  else:
    print(response.status_code)
#++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++






while True:
  x = input("""
Press 1 for deployment status
Press 2 to deploy
Enter Exit to exit
> """).lower()
  if x == "1":
    deploy()
    pprint('Status is: ' + status)
  elif x == "2":
    deploy2()
  elif x == "exit":
    break
    revoke()
  elif x != "1" or "2" or "exit":
    attempts += 1
    print("The options are 1, 2 or Exit only!")
    if attempts == 3:
      print('Closing the program')
      revoke()
      break
  else:
    raise Exception("Program shutting down")

Verificación

GET

Con ese script, se recibe una respuesta de código HTTP "200" y se presenta el resultado, como se muestra en la imagen siguiente.

Resultado del script

PUT

La nueva implementación está lista en la GUI de FDM con intentos correctos, como se muestra en la imagen. 

Captura de pantalla de la página de administración de FDM

La confirmación también se puede confirmar mediante la recepción de un código de respuesta HTTP 200.

BORRAR

Hay una nueva implementación lista en la GUI de FDM con intentos correctos. 

La confirmación también se puede confirmar mediante la recepción del código de respuesta HTTP 204.

Troubleshoot

En esta sección se describe cómo solucionar problemas.

El código de respuesta HTTP puede informar sobre los problemas específicos observados:

Errores del cliente 4XX

400- Solicitud incorrecta

401- No autorizado

403- Prohibido

404- No se encuentra

408: tiempo de espera de solicitud

415: tipo de medio no compatible

Errores del servidor 5xx

500: error interno del servidor

501- Sin implementar

502- Puerta de enlace incorrecta

503 - Servicio no disponible

Información Relacionada

RFC 2616: Protocolo de transferencia de hipertexto (HTTP/1.1) 

Introducción a Firepower Threat Defense REST API - FTD-API Reference v6(FTD v7.2) - Documento - Cisco Developer