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community.general/plugins/lookup/hashi_vault.py

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2020-03-09 10:11:07 +01:00
# (c) 2015, Jonathan Davila <jonathan(at)davila.io>
# (c) 2017 Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
DOCUMENTATION = '''
lookup: hashi_vault
author: Jonathan Davila <jdavila(at)ansible.com>
short_description: retrieve secrets from HashiCorp's vault
requirements:
- hvac (python library)
description:
- retrieve secrets from HashiCorp's vault
notes:
- Due to a current limitation in the HVAC library there won't necessarily be an error if a bad endpoint is specified.
- As of Ansible 2.10, only the latest secret is returned when specifying a KV v2 path.
options:
secret:
description: query you are making.
required: True
token:
description: vault token.
env:
- name: VAULT_TOKEN
url:
description: URL to vault service.
env:
- name: VAULT_ADDR
default: 'http://127.0.0.1:8200'
username:
description: Authentication user name.
password:
description: Authentication password.
role_id:
description: Role id for a vault AppRole auth.
env:
- name: VAULT_ROLE_ID
secret_id:
description: Secret id for a vault AppRole auth.
env:
- name: VAULT_SECRET_ID
auth_method:
description:
- Authentication method to be used.
- C(userpass) is added in version 2.8.
env:
- name: VAULT_AUTH_METHOD
choices:
- userpass
- ldap
- approle
mount_point:
description: vault mount point, only required if you have a custom mount point.
default: ldap
ca_cert:
description: path to certificate to use for authentication.
aliases: [ cacert ]
validate_certs:
description: controls verification and validation of SSL certificates, mostly you only want to turn off with self signed ones.
type: boolean
default: True
namespace:
description: namespace where secrets reside. requires HVAC 0.7.0+ and Vault 0.11+.
'''
EXAMPLES = """
- debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hello:value token=c975b780-d1be-8016-866b-01d0f9b688a5 url=http://myvault:8200')}}"
- name: Return all secrets from a path
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hello token=c975b780-d1be-8016-866b-01d0f9b688a5 url=http://myvault:8200')}}"
- name: Vault that requires authentication via LDAP
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hello:value auth_method=ldap mount_point=ldap username=myuser password=mypas url=http://myvault:8200')}}"
- name: Vault that requires authentication via username and password
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hello:value auth_method=userpass username=myuser password=mypas url=http://myvault:8200')}}"
- name: Using an ssl vault
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hola:value token=c975b780-d1be-8016-866b-01d0f9b688a5 url=https://myvault:8200 validate_certs=False')}}"
- name: using certificate auth
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hi:value token=xxxx-xxx-xxx url=https://myvault:8200 validate_certs=True cacert=/cacert/path/ca.pem')}}"
- name: authenticate with a Vault app role
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hello:value auth_method=approle role_id=myroleid secret_id=mysecretid url=http://myvault:8200')}}"
- name: Return all secrets from a path in a namespace
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/hello token=c975b780-d1be-8016-866b-01d0f9b688a5 url=http://myvault:8200 namespace=teama/admins')}}"
# When using KV v2 the PATH should include "data" between the secret engine mount and path (e.g. "secret/data/:path")
# see: https://www.vaultproject.io/api/secret/kv/kv-v2.html#read-secret-version
- name: Return latest KV v2 secret from path
debug:
msg: "{{ lookup('hashi_vault', 'secret=secret/data/hello token=my_vault_token url=http://myvault_url:8200') }}"
"""
RETURN = """
_raw:
description:
- secrets(s) requested
"""
import os
from ansible.errors import AnsibleError
from ansible.module_utils.parsing.convert_bool import boolean
from ansible.plugins.lookup import LookupBase
HAS_HVAC = False
try:
import hvac
HAS_HVAC = True
except ImportError:
HAS_HVAC = False
ANSIBLE_HASHI_VAULT_ADDR = 'http://127.0.0.1:8200'
if os.getenv('VAULT_ADDR') is not None:
ANSIBLE_HASHI_VAULT_ADDR = os.environ['VAULT_ADDR']
class HashiVault:
def __init__(self, **kwargs):
self.url = kwargs.get('url', ANSIBLE_HASHI_VAULT_ADDR)
self.namespace = kwargs.get('namespace', None)
self.avail_auth_method = ['approle', 'userpass', 'ldap']
# split secret arg, which has format 'secret/hello:value' into secret='secret/hello' and secret_field='value'
s = kwargs.get('secret')
if s is None:
raise AnsibleError("No secret specified for hashi_vault lookup")
s_f = s.rsplit(':', 1)
self.secret = s_f[0]
if len(s_f) >= 2:
self.secret_field = s_f[1]
else:
self.secret_field = ''
self.verify = self.boolean_or_cacert(kwargs.get('validate_certs', True), kwargs.get('cacert', ''))
# If a particular backend is asked for (and its method exists) we call it, otherwise drop through to using
# token auth. This means if a particular auth backend is requested and a token is also given, then we
# ignore the token and attempt authentication against the specified backend.
#
# to enable a new auth backend, simply add a new 'def auth_<type>' method below.
#
self.auth_method = kwargs.get('auth_method', os.environ.get('VAULT_AUTH_METHOD'))
self.verify = self.boolean_or_cacert(kwargs.get('validate_certs', True), kwargs.get('cacert', ''))
if self.auth_method and self.auth_method != 'token':
try:
if self.namespace is not None:
self.client = hvac.Client(url=self.url, verify=self.verify, namespace=self.namespace)
else:
self.client = hvac.Client(url=self.url, verify=self.verify)
# prefixing with auth_ to limit which methods can be accessed
getattr(self, 'auth_' + self.auth_method)(**kwargs)
except AttributeError:
raise AnsibleError("Authentication method '%s' not supported."
" Available options are %r" % (self.auth_method, self.avail_auth_method))
else:
self.token = kwargs.get('token', os.environ.get('VAULT_TOKEN', None))
if self.token is None and os.environ.get('HOME'):
token_filename = os.path.join(
os.environ.get('HOME'),
'.vault-token'
)
if os.path.exists(token_filename):
with open(token_filename) as token_file:
self.token = token_file.read().strip()
if self.token is None:
raise AnsibleError("No Vault Token specified")
if self.namespace is not None:
self.client = hvac.Client(url=self.url, token=self.token, verify=self.verify, namespace=self.namespace)
else:
self.client = hvac.Client(url=self.url, token=self.token, verify=self.verify)
if not self.client.is_authenticated():
raise AnsibleError("Invalid Hashicorp Vault Token Specified for hashi_vault lookup")
def get(self):
data = self.client.read(self.secret)
# Check response for KV v2 fields and flatten nested secret data.
#
# https://vaultproject.io/api/secret/kv/kv-v2.html#sample-response-1
try:
# sentinel field checks
check_dd = data['data']['data']
check_md = data['data']['metadata']
# unwrap nested data
data = data['data']
except KeyError:
pass
if data is None:
raise AnsibleError("The secret %s doesn't seem to exist for hashi_vault lookup" % self.secret)
if self.secret_field == '':
return data['data']
if self.secret_field not in data['data']:
raise AnsibleError("The secret %s does not contain the field '%s'. for hashi_vault lookup" % (self.secret, self.secret_field))
return data['data'][self.secret_field]
def check_params(self, **kwargs):
username = kwargs.get('username')
if username is None:
raise AnsibleError("Authentication method %s requires a username" % self.auth_method)
password = kwargs.get('password')
if password is None:
raise AnsibleError("Authentication method %s requires a password" % self.auth_method)
mount_point = kwargs.get('mount_point')
return username, password, mount_point
def auth_userpass(self, **kwargs):
username, password, mount_point = self.check_params(**kwargs)
if mount_point is None:
mount_point = 'userpass'
self.client.auth_userpass(username, password, mount_point=mount_point)
def auth_ldap(self, **kwargs):
username, password, mount_point = self.check_params(**kwargs)
if mount_point is None:
mount_point = 'ldap'
self.client.auth.ldap.login(username, password, mount_point=mount_point)
def boolean_or_cacert(self, validate_certs, cacert):
validate_certs = boolean(validate_certs, strict=False)
'''' return a bool or cacert '''
if validate_certs is True:
if cacert != '':
return cacert
else:
return True
else:
return False
def auth_approle(self, **kwargs):
role_id = kwargs.get('role_id', os.environ.get('VAULT_ROLE_ID', None))
if role_id is None:
raise AnsibleError("Authentication method app role requires a role_id")
secret_id = kwargs.get('secret_id', os.environ.get('VAULT_SECRET_ID', None))
if secret_id is None:
raise AnsibleError("Authentication method app role requires a secret_id")
self.client.auth_approle(role_id, secret_id)
class LookupModule(LookupBase):
def run(self, terms, variables=None, **kwargs):
if not HAS_HVAC:
raise AnsibleError("Please pip install hvac to use the hashi_vault lookup module.")
vault_args = terms[0].split()
vault_dict = {}
ret = []
for param in vault_args:
try:
key, value = param.split('=')
except ValueError:
raise AnsibleError("hashi_vault lookup plugin needs key=value pairs, but received %s" % terms)
vault_dict[key] = value
if 'ca_cert' in vault_dict.keys():
vault_dict['cacert'] = vault_dict['ca_cert']
vault_dict.pop('ca_cert', None)
vault_conn = HashiVault(**vault_dict)
for term in terms:
key = term.split()[0]
value = vault_conn.get()
ret.append(value)
return ret