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#
# -------------------------------------------------------------------------
# Copyright (c) 2018 OAM Technology Consulting LLC Intellectual Property
#
# 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.
#
# -------------------------------------------------------------------------
#
import base64
from datetime import datetime, timedelta
import json
import os
from conductor.common import rest
from conductor.i18n import _LE, _LI
from conductor.common.utils import cipherUtils
from oslo_log import log
LOG = log.getLogger(__name__)
from oslo_config import cfg
CONF = cfg.CONF
AAF_OPTS = [
cfg.BoolOpt('is_aaf_enabled',
default=False,
help='is_aaf_enabled.'),
cfg.IntOpt('aaf_cache_expiry_hrs',
default='24',
help='aaf_cache_expiry_hrs.'),
cfg.StrOpt('aaf_url',
default='https://aaf-service:8100/authz/perms/user/',
help='aaf_url.'),
cfg.StrOpt('username',
default=None,
help='username.'),
cfg.StrOpt('password',
default=None,
help='pasword.'),
cfg.StrOpt('aaf_cert_file',
default=None,
help='aaf_cert_file.'),
cfg.StrOpt('aaf_cert_key_file',
default=None,
help='aaf_cert_key_file.'),
cfg.StrOpt('aaf_ca_bundle_file',
default="",
help='aaf_ca_bundle_file.'),
cfg.IntOpt('aaf_retries',
default='3',
help='aaf_retries.'),
cfg.IntOpt('aaf_timeout',
default='100',
help='aaf_timeout.'),
cfg.StrOpt('aaf_conductor_user',
default=None,
help='aaf_conductor_user.'),
cfg.ListOpt('aaf_permissions',
default=['{"type": "org.onap.oof.access","instance": "*","action": "*"}'],
help='aaf_user_roles.')
]
CONF.register_opts(AAF_OPTS, group='aaf_api')
EXPIRE_TIME = 'expire_time'
perm_cache = {}
def clear_cache():
perm_cache.clear()
def authenticate(uid, passwd):
aafUser = None
username = CONF.conductor_api.username
password = CONF.conductor_api.password
if username == uid and password == passwd:
aafUser = CONF.aaf_api.aaf_conductor_user
else:
LOG.debug("Error Authenticating the user {} ".format(uid))
return False
try:
perms = get_aaf_permissions(aafUser)
return has_valid_permissions(perms)
except Exception as exp:
LOG.error("Error Authenticating the user {} : {}: ".format(uid, exp))
return False
"""
Check whether the user has valid permissions
return True if the user has valid permissions
else return false
"""
def has_valid_permissions(userPerms):
permissions = CONF.aaf_api.aaf_permissions
LOG.info("Validate permisions: acquired permissions {} ".format(userPerms))
LOG.info("Validate permisions: allowed permissions {} ".format(permissions))
userPermObj = json.loads(userPerms)
userPermList = userPermObj["perm"]
for perm in permissions:
permObj = json.loads(perm)
permType = permObj["type"]
permInstance = permObj["instance"]
permAction = permObj["action"]
for userPerm in userPermList:
userType = userPerm["type"]
userInstance = userPerm["instance"]
userAction = userPerm["action"]
if userType == permType and (userInstance == permInstance or permInstance == "*") and \
(userAction == permAction or permAction == "*"):
# FS - trace
LOG.info("User has valid permissions ")
return True
return False
"""
Make the remote aaf api call if user is not in the cache.
Return the perms
"""
def get_aaf_permissions(aafUser):
key = base64.b64encode("{}".format(aafUser).encode())
time_delta = timedelta(hours = CONF.aaf_api.aaf_cache_expiry_hrs)
perms = perm_cache.get(key)
if perms and datetime.now() < perms.get(EXPIRE_TIME):
LOG.debug("Returning cached value")
return perms['roles']
LOG.debug("Invoking AAF authentication API")
response = remote_api(aafUser)
perms = {EXPIRE_TIME: datetime.now() + time_delta, 'roles': response}
perm_cache[key] = perms
return response
"""
The remote api is the AAF service
"""
def remote_api(aafUser):
server_url = CONF.aaf_api.aaf_url+aafUser
kwargs = {
"server_url": server_url,
"retries": CONF.aaf_api.aaf_retries,
"username": CONF.aaf_api.username,
"password": CONF.aaf_api.password,
"log_debug": LOG.debug,
"read_timeout": CONF.aaf_api.aaf_timeout,
"cert_file": CONF.aaf_api.aaf_cert_file,
"cert_key_file": CONF.aaf_api.aaf_cert_key_file,
"ca_bundle_file": CONF.aaf_api.aaf_ca_bundle_file,
}
restReq = rest.REST(**kwargs)
headers = {"Accept": "application/Perms+json;q=1.0;charset=utf-8;version=2.1,application/json;q=1.0;version=2.1,*/*;q=1.0"}
rkwargs = {
"method": 'GET',
"path": '',
"headers": headers,
}
response = restReq.request(**rkwargs)
if response is None:
LOG.error(_LE("No response from AAF "))
elif response.status_code != 200:
LOG.error(_LE("AAF request returned HTTP "
"status {} {}, link: {}").
format(response.status_code, response.reason,
server_url))
return response.content
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