Browse Source

Authentication Overhaul

This patch updates the authentication system set up in heat:

- We now authenticate against the 'heat' service at the entry
  point to each api call in the engine.
- We are now using the 'Context' class to contain the authentication
  information as intended.
- The two context classes are unified and we now use the same one
  for both WSGI and RPC.  This is the intended design as the
  context is loaded by the WSGI middleware and then passed into the
  RPC methods.
- We are now doing token authentication in the API that works with
  both native keystone and AWS style authentication.  That token is
  then passed on to the engine for further authentication for various
  endpoints.

Note that the heat-api-paste.ini file requires updating in order for
this to work on your system.  Admin user and password must be set
properly in the authtoken section in order to perform token based
authentication.

I suspect there will be a few bugs in here yet.  This is just part of
the authentication/identification changes we need to make but I wanted
to get this in so we could continue to work with a boto based client.

Change-Id: Ib635ecd3088304e8d51d8e1fc31a8b1bf751caf3
Signed-off-by: Ian Main <imain@redhat.com>
changes/91/91/2
Ian Main 10 years ago
parent
commit
a5962d1078
  1. 34
      etc/heat-api-paste.ini
  2. 82
      heat/api/v1/__init__.py
  3. 36
      heat/api/v1/stacks.py
  4. 534
      heat/common/auth_token.py
  5. 106
      heat/common/context.py
  6. 125
      heat/context.py
  7. 68
      heat/engine/manager.py
  8. 8
      heat/engine/parser.py
  9. 13
      heat/engine/resources.py
  10. 2
      heat/metadata/api/v1/metadata.py
  11. 2
      heat/rpc/amqp.py
  12. 2
      heat/rpc/impl_fake.py
  13. 2
      heat/service.py
  14. 4
      heat/tests/test_resources.py
  15. 8
      heat/tests/test_stacks.py
  16. 22
      heat/tests/test_validate.py

34
etc/heat-api-paste.ini

@ -1,6 +1,7 @@
# Default minimal pipeline
# Default pipeline
[pipeline:heat-api]
pipeline = versionnegotiation context apiv1app
pipeline = versionnegotiation ec2authtoken authtoken context apiv1app
# Use the following pipeline for keystone auth
# i.e. in heat-api.conf:
@ -8,7 +9,7 @@ pipeline = versionnegotiation context apiv1app
# flavor = keystone
#
[pipeline:heat-api-keystone]
pipeline = versionnegotiation authtoken auth-context apiv1app
pipeline = versionnegotiation ec2authtoken authtoken context apiv1app
# Use the following pipeline to enable transparent caching of image files
# i.e. in heat-api.conf:
@ -16,7 +17,7 @@ pipeline = versionnegotiation authtoken auth-context apiv1app
# flavor = caching
#
[pipeline:heat-api-caching]
pipeline = versionnegotiation context cache apiv1app
pipeline = versionnegotiation ec2authtoken authtoken context cache apiv1app
# Use the following pipeline for keystone auth with caching
# i.e. in heat-api.conf:
@ -24,7 +25,7 @@ pipeline = versionnegotiation context cache apiv1app
# flavor = keystone+caching
#
[pipeline:heat-api-keystone+caching]
pipeline = versionnegotiation authtoken auth-context cache apiv1app
pipeline = versionnegotiation ec2authtoken authtoken context cache apiv1app
# Use the following pipeline to enable the Image Cache Management API
# i.e. in heat-api.conf:
@ -32,7 +33,7 @@ pipeline = versionnegotiation authtoken auth-context cache apiv1app
# flavor = cachemanagement
#
[pipeline:heat-api-cachemanagement]
pipeline = versionnegotiation context cache cachemanage apiv1app
pipeline = versionnegotiation ec2authtoken authtoken context cache cachemanage apiv1app
# Use the following pipeline for keystone auth with cache management
# i.e. in heat-api.conf:
@ -40,7 +41,7 @@ pipeline = versionnegotiation context cache cachemanage apiv1app
# flavor = keystone+cachemanagement
#
[pipeline:heat-api-keystone+cachemanagement]
pipeline = versionnegotiation authtoken auth-context cache cachemanage apiv1app
pipeline = versionnegotiation ec2authtoken authtoken auth-context cache cachemanage apiv1app
[app:apiv1app]
paste.app_factory = heat.common.wsgi:app_factory
@ -62,18 +63,27 @@ heat.filter_factory = heat.api.middleware.cache_manage:CacheManageFilter
paste.filter_factory = heat.common.wsgi:filter_factory
heat.filter_factory = heat.common.context:ContextMiddleware
[filter:ec2authtoken]
paste.filter_factory = heat.common.wsgi:filter_factory
heat.filter_factory = heat.api.v1:EC2Token
auth_uri = http://127.0.0.1:5000/v2.0
keystone_ec2_uri = http://localhost:5000/v2.0/ec2tokens
[filter:authtoken]
paste.filter_factory = keystone.middleware.auth_token:filter_factory
paste.filter_factory = heat.common.auth_token:filter_factory
service_protocol = http
service_host = 127.0.0.1
service_port = 5000
auth_host = 127.0.0.1
auth_port = 35357
auth_protocol = http
auth_uri = http://127.0.0.1:5000/
admin_tenant_name = %SERVICE_TENANT_NAME%
admin_user = %SERVICE_USER%
admin_password = %SERVICE_PASSWORD%
auth_uri = http://127.0.0.1:5000/v2.0
# These must be set to your local values in order for the token
# authentication to work.
admin_tenant_name = admin
admin_user = admin
admin_password = verybadpass
[filter:auth-context]
paste.filter_factory = heat.common.wsgi:filter_factory

82
heat/api/v1/__init__.py

@ -13,6 +13,9 @@
# License for the specific language governing permissions and limitations
# under the License.
import json
import urlparse
import httplib
import logging
import routes
import gettext
@ -23,10 +26,89 @@ from heat.api.v1 import stacks
from heat.common import wsgi
from webob import Request
import webob
from heat import utils
from heat.common import context
logger = logging.getLogger(__name__)
class EC2Token(wsgi.Middleware):
"""Authenticate an EC2 request with keystone and convert to token."""
def __init__(self, app, conf, **local_conf):
self.conf = local_conf
self.application = app
@webob.dec.wsgify(RequestClass=wsgi.Request)
def __call__(self, req):
# Read request signature and access id.
logger.info("Checking AWS credentials..")
try:
signature = req.params['Signature']
access = req.params['AWSAccessKeyId']
except KeyError:
# We ignore a key error here so that we can use both
# authentication methods. Returning here just means
# the user didn't supply AWS authentication and we'll let
# the app try native keystone next.
logger.info("No AWS credentials found.")
return self.application
logger.info("AWS credentials found, checking against keystone.")
# Make a copy of args for authentication and signature verification.
auth_params = dict(req.params)
# Not part of authentication args
auth_params.pop('Signature')
# Authenticate the request.
creds = {'ec2Credentials': {'access': access,
'signature': signature,
'host': req.host,
'verb': req.method,
'path': req.path,
'params': auth_params,
}}
creds_json = None
try:
creds_json = json.dumps(creds)
except TypeError:
creds_json = json.dumps(to_primitive(creds))
headers = {'Content-Type': 'application/json'}
# Disable 'has no x member' pylint error
# for httplib and urlparse
# pylint: disable-msg=E1101
logger.info('Authenticating with %s' % self.conf['keystone_ec2_uri'])
o = urlparse.urlparse(self.conf['keystone_ec2_uri'])
if o.scheme == 'http':
conn = httplib.HTTPConnection(o.netloc)
else:
conn = httplib.HTTPSConnection(o.netloc)
conn.request('POST', o.path, body=creds_json, headers=headers)
response = conn.getresponse().read()
conn.close()
# NOTE(vish): We could save a call to keystone by
# having keystone return token, tenant,
# user, and roles from this call.
result = json.loads(response)
try:
token_id = result['access']['token']['id']
logger.info("AWS authentication successful.")
except (AttributeError, KeyError):
# FIXME: Should be 404 I think.
logger.info("AWS authentication failure.")
raise webob.exc.HTTPBadRequest()
# Authenticated!
req.headers['X-Auth-Token'] = token_id
req.headers['X-Auth-URL'] = self.conf['auth_uri']
return self.application
class API(wsgi.Router):
"""

36
heat/api/v1/stacks.py

@ -29,8 +29,9 @@ from webob.exc import (HTTPNotFound,
HTTPBadRequest)
from heat.common import wsgi
from heat.common import config
from heat.common import context
from heat import utils
from heat import rpc
from heat import context
import heat.rpc.common as rpc_common
@ -51,10 +52,12 @@ class StackController(object):
"""
Returns the following information for all stacks:
"""
con = context.get_admin_context()
con = req.context
parms = dict(req.params)
stack_list = rpc.call(con, 'engine',
{'method': 'list_stacks',
'args': {'params': dict(req.params)}})
'args': {'params': parms}})
res = {'ListStacksResponse': {
'ListStacksResult': {'StackSummaries': []}}}
@ -70,13 +73,14 @@ class StackController(object):
"""
Returns the following information for all stacks:
"""
con = context.get_admin_context()
con = req.context
parms = dict(req.params)
try:
stack_list = rpc.call(con, 'engine',
{'method': 'show_stack',
'args': {'stack_name': req.params['StackName'],
'params': dict(req.params)}})
'params': parms}})
except rpc_common.RemoteError as ex:
return webob.exc.HTTPBadRequest(str(ex))
@ -116,7 +120,8 @@ class StackController(object):
"""
Returns the following information for all stacks:
"""
con = context.get_admin_context()
con = req.context
parms = dict(req.params)
try:
templ = self._get_template(req)
@ -139,13 +144,14 @@ class StackController(object):
{'method': 'create_stack',
'args': {'stack_name': req.params['StackName'],
'template': stack,
'params': dict(req.params)}})
'params': parms}})
except rpc_common.RemoteError as ex:
return webob.exc.HTTPBadRequest(str(ex))
def validate_template(self, req):
con = context.get_admin_context()
con = req.context
parms = dict(req.params)
try:
templ = self._get_template(req)
@ -167,7 +173,7 @@ class StackController(object):
return rpc.call(con, 'engine',
{'method': 'validate_template',
'args': {'template': stack,
'params': dict(req.params)}})
'params': parms}})
except rpc_common.RemoteError as ex:
return webob.exc.HTTPBadRequest(str(ex))
@ -175,13 +181,14 @@ class StackController(object):
"""
Returns the following information for all stacks:
"""
con = context.get_admin_context()
con = req.context
parms = dict(req.params)
try:
res = rpc.call(con, 'engine',
{'method': 'delete_stack',
'args': {'stack_name': req.params['StackName'],
'params': dict(req.params)}})
'params': parms}})
except rpc_common.RemoteError as ex:
return webob.exc.HTTPBadRequest(str(ex))
@ -195,12 +202,15 @@ class StackController(object):
"""
Returns the following information for all stacks:
"""
con = context.get_admin_context()
con = req.context
parms = dict(req.params)
stack_name = req.params.get('StackName', None)
try:
event_res = rpc.call(con, 'engine',
{'method': 'list_events',
'args': {'stack_name': stack_name}})
'args': {'stack_name': stack_name,
'params': parms}})
except rpc_common.RemoteError as ex:
return webob.exc.HTTPBadRequest(str(ex))

534
heat/common/auth_token.py

@ -0,0 +1,534 @@
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010-2012 OpenStack LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
TOKEN-BASED AUTH MIDDLEWARE
This WSGI component:
* Verifies that incoming client requests have valid tokens by validating
tokens with the auth service.
* Rejects unauthenticated requests UNLESS it is in 'delay_auth_decision'
mode, which means the final decision is delegated to the downstream WSGI
component (usually the OpenStack service)
* Collects and forwards identity information based on a valid token
such as user name, tenant, etc
Refer to: http://keystone.openstack.org/middlewarearchitecture.html
HEADERS
-------
* Headers starting with HTTP\_ is a standard http header
* Headers starting with HTTP_X is an extended http header
Coming in from initial call from client or customer
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
HTTP_X_AUTH_TOKEN
The client token being passed in.
HTTP_X_STORAGE_TOKEN
The client token being passed in (legacy Rackspace use) to support
swift/cloud files
Used for communication between components
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
WWW-Authenticate
HTTP header returned to a user indicating which endpoint to use
to retrieve a new token
What we add to the request for use by the OpenStack service
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
HTTP_X_IDENTITY_STATUS
'Confirmed' or 'Invalid'
The underlying service will only see a value of 'Invalid' if the Middleware
is configured to run in 'delay_auth_decision' mode
HTTP_X_TENANT_ID
Identity service managed unique identifier, string
HTTP_X_TENANT_NAME
Unique tenant identifier, string
HTTP_X_USER_ID
Identity-service managed unique identifier, string
HTTP_X_USER_NAME
Unique user identifier, string
HTTP_X_ROLES
Comma delimited list of case-sensitive Roles
HTTP_X_TENANT
*Deprecated* in favor of HTTP_X_TENANT_ID and HTTP_X_TENANT_NAME
Keystone-assigned unique identifier, deprecated
HTTP_X_USER
*Deprecated* in favor of HTTP_X_USER_ID and HTTP_X_USER_NAME
Unique user name, string
HTTP_X_ROLE
*Deprecated* in favor of HTTP_X_ROLES
This is being renamed, and the new header contains the same data.
"""
import httplib
import json
import logging
import time
import webob
import webob.exc
LOG = logging.getLogger(__name__)
class InvalidUserToken(Exception):
pass
class ServiceError(Exception):
pass
class AuthProtocol(object):
"""Auth Middleware that handles authenticating client calls."""
def __init__(self, app, conf):
LOG.info('Starting keystone auth_token middleware')
self.conf = conf
self.app = app
# delay_auth_decision means we still allow unauthenticated requests
# through and we let the downstream service make the final decision
self.delay_auth_decision = int(conf.get('delay_auth_decision', 0))
# where to find the auth service (we use this to validate tokens)
self.auth_host = conf.get('auth_host')
self.auth_port = int(conf.get('auth_port', 35357))
auth_protocol = conf.get('auth_protocol', 'https')
if auth_protocol == 'http':
self.http_client_class = httplib.HTTPConnection
else:
self.http_client_class = httplib.HTTPSConnection
default_auth_uri = '%s://%s:%s' % (auth_protocol,
self.auth_host,
self.auth_port)
self.auth_uri = conf.get('auth_uri', default_auth_uri)
# Credentials used to verify this component with the Auth service since
# validating tokens is a privileged call
self.admin_token = conf.get('admin_token')
self.admin_user = conf.get('admin_user')
self.admin_password = conf.get('admin_password')
self.admin_tenant_name = conf.get('admin_tenant_name', 'admin')
# Token caching via memcache
self._cache = None
self._iso8601 = None
memcache_servers = conf.get('memcache_servers')
# By default the token will be cached for 5 minutes
self.token_cache_time = conf.get('token_cache_time', 300)
if memcache_servers:
try:
import memcache
import iso8601
LOG.info('Using memcache for caching token')
self._cache = memcache.Client(memcache_servers.split(','))
self._iso8601 = iso8601
except NameError as e:
LOG.warn('disabled caching due to missing libraries %s', e)
def __call__(self, env, start_response):
"""Handle incoming request.
Authenticate send downstream on success. Reject request if
we can't authenticate.
"""
LOG.debug('Authenticating user token')
try:
self._remove_auth_headers(env)
user_token = self._get_user_token_from_header(env)
token_info = self._validate_user_token(user_token)
user_headers = self._build_user_headers(token_info)
self._add_headers(env, user_headers)
return self.app(env, start_response)
except InvalidUserToken:
if self.delay_auth_decision:
LOG.info('Invalid user token - deferring reject downstream')
self._add_headers(env, {'X-Identity-Status': 'Invalid'})
return self.app(env, start_response)
else:
LOG.info('Invalid user token - rejecting request')
return self._reject_request(env, start_response)
except ServiceError, e:
LOG.critical('Unable to obtain admin token: %s' % e)
resp = webob.exc.HTTPServiceUnavailable()
return resp(env, start_response)
def _remove_auth_headers(self, env):
"""Remove headers so a user can't fake authentication.
:param env: wsgi request environment
"""
auth_headers = (
'X-Identity-Status',
'X-Tenant-Id',
'X-Tenant-Name',
'X-User-Id',
'X-User-Name',
'X-Roles',
# Deprecated
'X-User',
'X-Tenant',
'X-Role',
)
LOG.debug('Removing headers from request environment: %s' %
','.join(auth_headers))
self._remove_headers(env, auth_headers)
def _get_user_token_from_header(self, env):
"""Get token id from request.
:param env: wsgi request environment
:return token id
:raises InvalidUserToken if no token is provided in request
"""
token = self._get_header(env, 'X-Auth-Token',
self._get_header(env, 'X-Storage-Token'))
if token:
return token
else:
LOG.warn("Unable to find authentication token in headers: %s", env)
raise InvalidUserToken('Unable to find token in headers')
def _reject_request(self, env, start_response):
"""Redirect client to auth server.
:param env: wsgi request environment
:param start_response: wsgi response callback
:returns HTTPUnauthorized http response
"""
headers = [('WWW-Authenticate', 'Keystone uri=\'%s\'' % self.auth_uri)]
resp = webob.exc.HTTPUnauthorized('Authentication required', headers)
return resp(env, start_response)
def get_admin_token(self):
"""Return admin token, possibly fetching a new one.
:return admin token id
:raise ServiceError when unable to retrieve token from keystone
"""
if not self.admin_token:
self.admin_token = self._request_admin_token()
return self.admin_token
def _get_http_connection(self):
return self.http_client_class(self.auth_host, self.auth_port)
def _json_request(self, method, path, body=None, additional_headers=None):
"""HTTP request helper used to make json requests.
:param method: http method
:param path: relative request url
:param body: dict to encode to json as request body. Optional.
:param additional_headers: dict of additional headers to send with
http request. Optional.
:return (http response object, response body parsed as json)
:raise ServerError when unable to communicate with keystone
"""
conn = self._get_http_connection()
kwargs = {
'headers': {
'Content-type': 'application/json',
'Accept': 'application/json',
},
}
if additional_headers:
kwargs['headers'].update(additional_headers)
if body:
kwargs['body'] = json.dumps(body)
try:
conn.request(method, path, **kwargs)
response = conn.getresponse()
body = response.read()
except Exception, e:
LOG.error('HTTP connection exception: %s' % e)
raise ServiceError('Unable to communicate with keystone')
finally:
conn.close()
try:
data = json.loads(body)
except ValueError:
LOG.debug('Keystone did not return json-encoded body')
data = {}
return response, data
def _request_admin_token(self):
"""Retrieve new token as admin user from keystone.
:return token id upon success
:raises ServerError when unable to communicate with keystone
"""
params = {
'auth': {
'passwordCredentials': {
'username': self.admin_user,
'password': self.admin_password,
},
'tenantName': self.admin_tenant_name,
}
}
response, data = self._json_request('POST',
'/v2.0/tokens',
body=params)
try:
token = data['access']['token']['id']
assert token
return token
except (AssertionError, KeyError):
LOG.warn("Unexpected response from keystone service: %s", data)
raise ServiceError('invalid json response')
def _validate_user_token(self, user_token, retry=True):
"""Authenticate user token with keystone.
:param user_token: user's token id
:param retry: flag that forces the middleware to retry
user authentication when an indeterminate
response is received. Optional.
:return token object received from keystone on success
:raise InvalidUserToken if token is rejected
:raise ServiceError if unable to authenticate token
"""
cached = self._cache_get(user_token)
if cached:
return cached
headers = {'X-Auth-Token': self.get_admin_token()}
response, data = self._json_request('GET',
'/v2.0/tokens/%s' % user_token,
additional_headers=headers)
if response.status == 200:
self._cache_put(user_token, data)
return data
if response.status == 404:
# FIXME(ja): I'm assuming the 404 status means that user_token is
# invalid - not that the admin_token is invalid
self._cache_store_invalid(user_token)
LOG.warn("Authorization failed for token %s", user_token)
raise InvalidUserToken('Token authorization failed')
if response.status == 401:
LOG.info('Keystone rejected admin token %s, resetting', headers)
self.admin_token = None
else:
LOG.error('Bad response code while validating token: %s' %
response.status)
if retry:
LOG.info('Retrying validation')
return self._validate_user_token(user_token, False)
else:
LOG.warn("Invalid user token: %s. Keystone response: %s.",
user_token, data)
raise InvalidUserToken()
def _build_user_headers(self, token_info):
"""Convert token object into headers.
Build headers that represent authenticated user:
* X_IDENTITY_STATUS: Confirmed or Invalid
* X_TENANT_ID: id of tenant if tenant is present
* X_TENANT_NAME: name of tenant if tenant is present
* X_USER_ID: id of user
* X_USER_NAME: name of user
* X_ROLES: list of roles
Additional (deprecated) headers include:
* X_USER: name of user
* X_TENANT: For legacy compatibility before we had ID and Name
* X_ROLE: list of roles
:param token_info: token object returned by keystone on authentication
:raise InvalidUserToken when unable to parse token object
"""
user = token_info['access']['user']
token = token_info['access']['token']
roles = ','.join([role['name'] for role in user.get('roles', [])])
def get_tenant_info():
"""Returns a (tenant_id, tenant_name) tuple from context."""
def essex():
"""Essex puts the tenant ID and name on the token."""
return (token['tenant']['id'], token['tenant']['name'])
def pre_diablo():
"""Pre-diablo, Keystone only provided tenantId."""
return (token['tenantId'], token['tenantId'])
def default_tenant():
"""Assume the user's default tenant."""
return (user['tenantId'], user['tenantName'])
for method in [essex, pre_diablo, default_tenant]:
try:
return method()
except KeyError:
pass
raise InvalidUserToken('Unable to determine tenancy.')
tenant_id, tenant_name = get_tenant_info()
user_id = user['id']
user_name = user['name']
return {
'X-Identity-Status': 'Confirmed',
'X-Tenant-Id': tenant_id,
'X-Tenant-Name': tenant_name,
'X-User-Id': user_id,
'X-User-Name': user_name,
'X-Roles': roles,
# Deprecated
'X-User': user_name,
'X-Tenant': tenant_name,
'X-Role': roles,
'X-Admin-User': self.admin_user,
'X-Admin-Pass': self.admin_password,
'X-Auth-Url': self.conf['auth_uri'],
}
def _header_to_env_var(self, key):
"""Convert header to wsgi env variable.
:param key: http header name (ex. 'X-Auth-Token')
:return wsgi env variable name (ex. 'HTTP_X_AUTH_TOKEN')
"""
return 'HTTP_%s' % (key.replace('-', '_').upper())
def _add_headers(self, env, headers):
"""Add http headers to environment."""
for (k, v) in headers.iteritems():
env_key = self._header_to_env_var(k)
env[env_key] = v
def _remove_headers(self, env, keys):
"""Remove http headers from environment."""
for k in keys:
env_key = self._header_to_env_var(k)
try:
del env[env_key]
except KeyError:
pass
def _get_header(self, env, key, default=None):
"""Get http header from environment."""
env_key = self._header_to_env_var(key)
return env.get(env_key, default)
def _cache_get(self, token):
"""Return token information from cache.
If token is invalid raise InvalidUserToken
return token only if fresh (not expired).
"""
if self._cache and token:
key = 'tokens/%s' % token
cached = self._cache.get(key)
if cached == 'invalid':
LOG.debug('Cached Token %s is marked unauthorized', token)
raise InvalidUserToken('Token authorization failed')
if cached:
data, expires = cached
if time.time() < float(expires):
LOG.debug('Returning cached token %s', token)
return data
else:
LOG.debug('Cached Token %s seems expired', token)
def _cache_put(self, token, data):
"""Put token data into the cache.
Stores the parsed expire date in cache allowing
quick check of token freshness on retrieval.
"""
if self._cache and data:
key = 'tokens/%s' % token
if 'token' in data.get('access', {}):
timestamp = data['access']['token']['expires']
expires = self._iso8601.parse_date(timestamp).strftime('%s')
else:
LOG.error('invalid token format')
return
LOG.debug('Storing %s token in memcache', token)
self._cache.set(key,
(data, expires),
time=self.token_cache_time)
def _cache_store_invalid(self, token):
"""Store invalid token in cache."""
if self._cache:
key = 'tokens/%s' % token
LOG.debug('Marking token %s as unauthorized in memcache', token)
self._cache.set(key,
'invalid',
time=self.token_cache_time)
def filter_factory(global_conf, **local_conf):
"""Returns a WSGI filter app for use with paste.deploy."""
conf = global_conf.copy()
conf.update(local_conf)
def auth_filter(app):
return AuthProtocol(app, conf)
return auth_filter
def app_factory(global_conf, **local_conf):
conf = global_conf.copy()
conf.update(local_conf)
return AuthProtocol(None, conf)

106
heat/common/context.py

@ -13,10 +13,16 @@
# License for the specific language governing permissions and limitations
# under the License.
from heat.openstack.common import local
from heat.common import exception
from heat.common import wsgi
from heat.openstack.common import cfg
from heat.openstack.common import importutils
from heat.common import utils as heat_utils
def generate_request_id():
return 'req-' + str(heat_utils.gen_uuid())
class RequestContext(object):
@ -25,17 +31,48 @@ class RequestContext(object):
accesses the system, as well as additional request information.
"""
def __init__(self, auth_tok=None, user=None, tenant=None, roles=None,
def __init__(self, auth_token=None, username=None, password=None,
tenant=None, tenant_id=None, auth_url=None, roles=None,
is_admin=False, read_only=False, show_deleted=False,
owner_is_tenant=True):
self.auth_tok = auth_tok
self.user = user
owner_is_tenant=True, overwrite=True, **kwargs):
"""
:param overwrite: Set to False to ensure that the greenthread local
copy of the index is not overwritten.
:param kwargs: Extra arguments that might be present, but we ignore
because they possibly came in from older rpc messages.
"""
self.auth_token = auth_token
self.username = username
self.password = password
self.tenant = tenant
self.tenant_id = tenant_id
self.auth_url = auth_url
self.roles = roles or []
self.is_admin = is_admin
self.read_only = read_only
self._show_deleted = show_deleted
self.owner_is_tenant = owner_is_tenant
if overwrite or not hasattr(local.store, 'context'):
self.update_store()
def update_store(self):
local.store.context = self
def to_dict(self):
return {'auth_token': self.auth_token,
'username': self.username,
'password': self.password,
'tenant': self.tenant,
'tenant_id': self.tenant_id,
'auth_url': self.auth_url,
'roles': self.roles,
'is_admin': self.is_admin}
@classmethod
def from_dict(cls, values):
return cls(**values)
@property
def owner(self):
@ -50,6 +87,10 @@ class RequestContext(object):
return False
def get_admin_context(read_deleted="no"):
return RequestContext(is_admin=True)
class ContextMiddleware(wsgi.Middleware):
opts = [
@ -93,30 +134,33 @@ class ContextMiddleware(wsgi.Middleware):
tokenauth middleware would have rejected the request, so we must be
using NoAuth. In that case, assume that is_admin=True.
"""
auth_tok = req.headers.get('X-Auth-Token')
#
# hack alert, this is for POC only FIXME properly!
#
if False:
if req.headers.get('X-Identity-Status') == 'Confirmed':
# 1. Auth-token is passed, check other headers
user = req.headers.get('X-User-Id')
tenant = req.headers.get('X-Tenant-Id')
roles = [r.strip()
for r in req.headers.get('X-Roles', '').split(',')]
is_admin = self.conf.admin_role in roles
else:
# 2. Indentity-Status not confirmed
# FIXME(sirp): not sure what the correct behavior in this case
# is; just raising NotAuthenticated for now
raise exception.NotAuthenticated()
else:
# 3. Auth-token is ommited, assume NoAuth
user = None
tenant = None
roles = []
is_admin = True
req.context = self.make_context(
auth_tok=auth_tok, user=user, tenant=tenant, roles=roles,
is_admin=is_admin)
headers = req.headers
try:
"""
This sets the username/password to the admin user because you
need this information in order to perform token authentication.
The real 'username' is the 'tenant'.
We should also check here to see if X-Auth-Token is not set and
in that case we should assign the user/pass directly as the real
username/password and token as None. 'tenant' should still be
the username.
"""
token = headers.get('X-Auth-Token')
username = headers.get('X-Admin-User')
password = headers.get('X-Admin-Pass')
tenant = headers.get('X-Tenant')
tenant_id = headers.get('X-Tenant-Id')
auth_url = headers.get('X-Auth-Url')
roles = headers.get('X-Roles')
except:
raise exception.NotAuthenticated()
req.context = self.make_context(auth_token=token,
tenant=tenant, tenant_id=tenant_id,
username=username,
password=password,
auth_url=auth_url, roles=roles,
is_admin=True)

125
heat/context.py

@ -1,125 +0,0 @@
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 OpenStack LLC.
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""RequestContext: context for requests that persist through all of nova."""
import copy
import logging
from heat.openstack.common import local
from heat.openstack.common import utils
from heat.openstack.common import timeutils
from heat.common import utils as heat_utils
LOG = logging.getLogger(__name__)
def generate_request_id():
return 'req-' + str(heat_utils.gen_uuid())
class RequestContext(object):
"""Security context and request information.
Represents the user taking a given action within the system.
"""
def __init__(self, user_id, project_id, is_admin=None, read_deleted="no",
roles=None, remote_address=None, timestamp=None,
request_id=None, auth_token=None, overwrite=True, **kwargs):
"""
:param read_deleted: 'no' indicates deleted records are hidden, 'yes'
indicates deleted records are visible, 'only' indicates that
*only* deleted records are visible.
:param overwrite: Set to False to ensure that the greenthread local
copy of the index is not overwritten.
:param kwargs: Extra arguments that might be present, but we ignore
because they possibly came in from older rpc messages.
"""
if read_deleted not in ('no', 'yes', 'only'):
raise ValueError(_("read_deleted can only be one of 'no', "
"'yes' or 'only', not %r") % read_deleted)
if kwargs:
LOG.warn(_('Arguments dropped when creating context: %s') %
str(kwargs))
self.user_id = user_id
self.project_id = project_id
self.roles = roles or []
self.is_admin = is_admin
if self.is_admin is None:
self.is_admin = 'admin' in [x.lower() for x in self.roles]
elif self.is_admin and 'admin' not in self.roles:
self.roles.append('admin')
self.read_deleted = read_deleted
self.remote_address = remote_address
if not timestamp:
timestamp = timeutils.utcnow()
if isinstance(timestamp, basestring):
timestamp = heat_utils.parse_strtime(timestamp)
self.timestamp = timestamp
if not request_id:
request_id = generate_request_id()
self.request_id = request_id
self.auth_token = auth_token
if overwrite or not hasattr(local.store, 'context'):
self.update_store()
def update_store(self):
local.store.context = self
def to_dict(self):
return {'user_id': self.user_id,
'project_id': self.project_id,
'is_admin': self.is_admin,
'read_deleted': self.read_deleted,
'roles': self.roles,
'remote_address': self.remote_address,
'timestamp': heat_utils.strtime(self.timestamp),
'request_id': self.request_id,
'auth_token': self.auth_token}
@classmethod
def from_dict(cls, values):
return cls(**values)
def elevated(self, read_deleted=None, overwrite=False):
"""Return a version of this context with admin flag set."""
context = copy.copy(self)
context.is_admin = True
if 'admin' not in context.roles:
context.roles.append('admin')
if read_deleted is not None:
context.read_deleted = read_deleted
return context
def get_admin_context(read_deleted="no"):
return RequestContext(user_id=None,
project_id=None,
is_admin=True,
read_deleted=read_deleted,
overwrite=False)

68
heat/engine/manager.py

@ -33,6 +33,10 @@ from heat.engine import resources
from heat.db import api as db_api
from heat.openstack.common import timeutils
from novaclient.v1_1 import client
from novaclient.exceptions import BadRequest
from novaclient.exceptions import NotFound
logger = logging.getLogger('heat.engine.manager')
@ -51,6 +55,21 @@ class EngineManager(manager.Manager):
"""Load configuration options and connect to the hypervisor."""
pass
def _authenticate(self, con):
""" Authenticate against the 'heat' service. This should be
the first call made in an endpoint call. I like to see this
done explicitly so that it is clear there is an authentication
request at the entry to the call.
"""
nova = client.Client(con.username, con.password,
con.tenant, con.auth_url,
proxy_token=con.auth_token,
proxy_tenant_id=con.tenant_id,
service_type='heat',
service_name='heat')
nova.authenticate()
def list_stacks(self, context, params):
"""
The list_stacks method is the end point that actually implements
@ -58,13 +77,16 @@ class EngineManager(manager.Manager):
arg1 -> RPC context.
arg2 -> Dict of http request parameters passed in from API side.
"""
logger.info('context is %s' % context)
self._authenticate(context)
res = {'stacks': []}
stacks = db_api.stack_get_all(None)
if stacks == None:
return res
for s in stacks:
ps = parser.Stack(s.name, s.raw_template.parsed_template.template,
ps = parser.Stack(context, s.name,
s.raw_template.parsed_template.template,
s.id, params)
mem = {}
mem['stack_id'] = s.id
@ -84,10 +106,13 @@ class EngineManager(manager.Manager):
arg2 -> Name of the stack you want to see.
arg3 -> Dict of http request parameters passed in from API side.
"""
self._authenticate(context)
res = {'stacks': []}
s = db_api.stack_get(None, stack_name)
if s:
ps = parser.Stack(s.name, s.raw_template.parsed_template.template,
ps = parser.Stack(context, s.name,
s.raw_template.parsed_template.template,
s.id, params)
mem = {}
mem['stack_id'] = s.id
@ -122,6 +147,9 @@ class EngineManager(manager.Manager):
arg4 -> Params passed from API.
"""
logger.info('template is %s' % template)
self._authenticate(context)
if db_api.stack_get(None, stack_name):
return {'Error': 'Stack already exists with that name.'}
@ -129,8 +157,9 @@ class EngineManager(manager.Manager):
# We don't want to reset the stack template, so we are making
# an instance just for validation.
template_copy = deepcopy(template)
stack_validator = parser.Stack(stack_name, template_copy, 0, params,
metadata_server=metadata_server)
stack_validator = parser.Stack(context, stack_name,
template_copy, 0, params,
metadata_server=metadata_server)
response = stack_validator.validate()
stack_validator = None
template_copy = None
@ -138,7 +167,7 @@ class EngineManager(manager.Manager):
response['ValidateTemplateResult']['Description']:
return response['ValidateTemplateResult']['Description']
stack = parser.Stack(stack_name, template, 0, params,
stack = parser.Stack(context, stack_name, template, 0, params,
metadata_server=metadata_server)
rt = {}
rt['template'] = template
@ -172,13 +201,15 @@ class EngineManager(manager.Manager):
arg4 -> Params passed from API.
"""
self._authenticate(context)
logger.info('validate_template')
if template is None:
msg = _("No Template provided.")
return webob.exc.HTTPBadRequest(explanation=msg)
try:
s = parser.Stack('validate', template, 0, params)
s = parser.Stack(context, 'validate', template, 0, params)
except KeyError:
res = 'A Fn::FindInMap operation referenced'\
'a non-existent map [%s]' % sys.exc_value
@ -199,13 +230,17 @@ class EngineManager(manager.Manager):
arg2 -> Name of the stack you want to delete.
arg3 -> Params passed from API.
"""
self._authenticate(context)
st = db_api.stack_get(None, stack_name)
if not st:
return {'Error': 'No stack by that name'}
logger.info('deleting stack %s' % stack_name)
ps = parser.Stack(st.name, st.raw_template.parsed_template.template,
ps = parser.Stack(context, st.name,
st.raw_template.parsed_template.template,
st.id, params)
ps.delete()
return None
@ -224,12 +259,16 @@ class EngineManager(manager.Manager):
'ResourceProperties': event.resource_properties,
'ResourceStatus': event.name}
def list_events(self, context, stack_name):
def list_events(self, context, stack_name, params):
"""
The list_events method lists all events associated with a given stack.
arg1 -> RPC context.
arg2 -> Name of the stack you want to get events for.
arg3 -> Params passed from API.
"""
self._authenticate(context)
if stack_name is not None:
st = db_api.stack_get(None, stack_name)
if not st:
@ -242,6 +281,9 @@ class EngineManager(manager.Manager):
return {'events': [self.parse_event(e) for e in events]}
def event_create(self, context, event):
self._authenticate(context)
stack_name = event['stack']
resource_name = event['resource']
stack = db_api.stack_get(None, stack_name)
@ -274,6 +316,8 @@ class EngineManager(manager.Manager):
"""
Return the names of the stacks registered with Heat.
"""
self._authenticate(context)
stacks = db_api.stack_get_all(None)
return [s.name for s in stacks]
@ -281,6 +325,8 @@ class EngineManager(manager.Manager):
"""
Return the resource IDs of the given stack.
"""
self._authenticate(context)
stack = db_api.stack_get(None, stack_name)
if stack:
return [r.name for r in stack.resources]
@ -291,6 +337,8 @@ class EngineManager(manager.Manager):
"""
Get the metadata for the given resource.
"""
self._authenticate(context)
s = db_api.stack_get(None, stack_name)
if not s:
return ['stack', None]
@ -306,6 +354,8 @@ class EngineManager(manager.Manager):
"""
Update the metadata for the given resource.
"""
self._authenticate(context)
s = db_api.stack_get(None, stack_name)
if not s:
return ['stack', None]

8
heat/engine/parser.py

@ -58,9 +58,10 @@ class Stack(object):
DELETE_FAILED = 'DELETE_FAILED'
DELETE_COMPLETE = 'DELETE_COMPLETE'
def __init__(self, stack_name, template, stack_id=0, parms=None,
def __init__(self, context, stack_name, template, stack_id=0, parms=None,
metadata_server=None):
self.id = stack_id
self.context = context
self.t = template
self.maps = self.t.get('Mappings', {})
self.outputs = self.t.get('Outputs', {})