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236 lines
8.2 KiB
Python
236 lines
8.2 KiB
Python
# (c) 2015, Jonathan Davila <jonathan(at)davila.io>
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# (c) 2017 Ansible Project
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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DOCUMENTATION = """
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lookup: hashi_vault
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author: Jonathan Davila <jdavila(at)ansible.com>
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version_added: "2.0"
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short_description: retrieve secrets from HashiCorp's vault
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requirements:
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- hvac (python library)
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description:
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- retrieve secrets from HashiCorp's vault
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notes:
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- Due to a current limitation in the HVAC library there won't necessarily be an error if a bad endpoint is specified.
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options:
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secret:
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description: query you are making
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required: True
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token:
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description: vault token
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env:
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- name: VAULT_TOKEN
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url:
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description: url to vault service
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env:
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- name: VAULT_ADDR
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default: 'http://127.0.0.1:8200'
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username:
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description: authentication user name
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password:
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description: authentication password
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role_id:
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description: Role id for a vault AppRole auth
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env:
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- name: VAULT_ROLE_ID
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secret_id:
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description: Secret id for a vault AppRole auth
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env:
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- name: VAULT_SECRET_ID
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auth_method:
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description: authentication method used
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mount_point:
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description: vault mount point, only required if you have a custom mount point
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default: ldap
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cacert:
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description: path to certificate to use for authentication
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validate_certs:
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description: controls verification and validation of SSL certificates, mostly you only want to turn off with self signed ones.
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type: boolean
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default: True
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"""
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EXAMPLES = """
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- debug:
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msg: "{{ lookup('hashi_vault', 'secret=secret/hello:value token=c975b780-d1be-8016-866b-01d0f9b688a5 url=http://myvault:8200')}}"
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- name: Return all secrets from a path
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debug:
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msg: "{{ lookup('hashi_vault', 'secret=secret/hello token=c975b780-d1be-8016-866b-01d0f9b688a5 url=http://myvault:8200')}}"
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- name: Vault that requires authentication via LDAP
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debug:
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msg: "{{ lookup('hashi_vault', 'secret=secret/hello:value auth_method=ldap mount_point=ldap username=myuser password=mypas url=http://myvault:8200')}}"
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- name: Using an ssl vault
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debug:
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msg: "{{ lookup('hashi_vault', 'secret=secret/hola:value token=c975b780-d1be-8016-866b-01d0f9b688a5 url=https://myvault:8200 validate_certs=False')}}"
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- name: using certificate auth
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debug:
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msg: "{{ lookup('hashi_vault', 'secret=secret/hi:value token=xxxx-xxx-xxx url=https://myvault:8200 validate_certs=True cacert=/cacert/path/ca.pem')}}"
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- name: authenticate with a Vault app role
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debug:
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msg: "{{ lookup('hashi_vault', 'secret=secret/hello:value auth_method=approle role_id=myroleid secret_id=mysecretid url=http://myvault:8200')}}"
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"""
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RETURN = """
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_raw:
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description:
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- secrets(s) requested
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"""
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import os
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from ansible.errors import AnsibleError
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from ansible.module_utils.parsing.convert_bool import boolean
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from ansible.plugins.lookup import LookupBase
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HAS_HVAC = False
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try:
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import hvac
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HAS_HVAC = True
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except ImportError:
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HAS_HVAC = False
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ANSIBLE_HASHI_VAULT_ADDR = 'http://127.0.0.1:8200'
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if os.getenv('VAULT_ADDR') is not None:
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ANSIBLE_HASHI_VAULT_ADDR = os.environ['VAULT_ADDR']
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class HashiVault:
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def __init__(self, **kwargs):
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self.url = kwargs.get('url', ANSIBLE_HASHI_VAULT_ADDR)
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# split secret arg, which has format 'secret/hello:value' into secret='secret/hello' and secret_field='value'
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s = kwargs.get('secret')
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if s is None:
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raise AnsibleError("No secret specified for hashi_vault lookup")
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s_f = s.rsplit(':', 1)
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self.secret = s_f[0]
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if len(s_f) >= 2:
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self.secret_field = s_f[1]
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else:
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self.secret_field = ''
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self.verify = self.boolean_or_cacert(kwargs.get('validate_certs', True), kwargs.get('cacert', ''))
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# If a particular backend is asked for (and its method exists) we call it, otherwise drop through to using
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# token auth. This means if a particular auth backend is requested and a token is also given, then we
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# ignore the token and attempt authentication against the specified backend.
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#
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# to enable a new auth backend, simply add a new 'def auth_<type>' method below.
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#
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self.auth_method = kwargs.get('auth_method')
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if self.auth_method and self.auth_method != 'token':
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try:
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self.client = hvac.Client(url=self.url, verify=self.verify)
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# prefixing with auth_ to limit which methods can be accessed
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getattr(self, 'auth_' + self.auth_method)(**kwargs)
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except AttributeError:
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raise AnsibleError("Authentication method '%s' not supported" % self.auth_method)
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else:
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self.token = kwargs.get('token', os.environ.get('VAULT_TOKEN', None))
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if self.token is None and os.environ.get('HOME'):
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token_filename = os.path.join(
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os.environ.get('HOME'),
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'.vault-token'
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)
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if os.path.exists(token_filename):
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with open(token_filename) as token_file:
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self.token = token_file.read().strip()
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if self.token is None:
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raise AnsibleError("No Vault Token specified")
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self.client = hvac.Client(url=self.url, token=self.token, verify=self.verify)
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if not self.client.is_authenticated():
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raise AnsibleError("Invalid Hashicorp Vault Token Specified for hashi_vault lookup")
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def get(self):
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data = self.client.read(self.secret)
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if data is None:
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raise AnsibleError("The secret %s doesn't seem to exist for hashi_vault lookup" % self.secret)
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if self.secret_field == '':
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return data['data']
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if self.secret_field not in data['data']:
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raise AnsibleError("The secret %s does not contain the field '%s'. for hashi_vault lookup" % (self.secret, self.secret_field))
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return data['data'][self.secret_field]
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def auth_ldap(self, **kwargs):
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username = kwargs.get('username')
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if username is None:
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raise AnsibleError("Authentication method ldap requires a username")
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password = kwargs.get('password')
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if password is None:
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raise AnsibleError("Authentication method ldap requires a password")
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mount_point = kwargs.get('mount_point')
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if mount_point is None:
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mount_point = 'ldap'
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self.client.auth_ldap(username, password, mount_point)
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def boolean_or_cacert(self, validate_certs, cacert):
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validate_certs = boolean(validate_certs, strict=False)
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'''' return a bool or cacert '''
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if validate_certs is True:
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if cacert != '':
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return cacert
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else:
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return True
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else:
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return False
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def auth_approle(self, **kwargs):
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role_id = kwargs.get('role_id', os.environ.get('VAULT_ROLE_ID', None))
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if role_id is None:
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raise AnsibleError("Authentication method app role requires a role_id")
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secret_id = kwargs.get('secret_id', os.environ.get('VAULT_SECRET_ID', None))
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if secret_id is None:
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raise AnsibleError("Authentication method app role requires a secret_id")
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self.client.auth_approle(role_id, secret_id)
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class LookupModule(LookupBase):
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def run(self, terms, variables, **kwargs):
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if not HAS_HVAC:
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raise AnsibleError("Please pip install hvac to use the hashi_vault lookup module.")
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vault_args = terms[0].split(' ')
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vault_dict = {}
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ret = []
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for param in vault_args:
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try:
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key, value = param.split('=')
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except ValueError:
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raise AnsibleError("hashi_vault lookup plugin needs key=value pairs, but received %s" % terms)
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vault_dict[key] = value
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vault_conn = HashiVault(**vault_dict)
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for term in terms:
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key = term.split()[0]
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value = vault_conn.get()
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ret.append(value)
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return ret
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