powerdns-admin/powerdnsadmin/models/user.py

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import os
import base64
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import traceback
import bcrypt
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import pyotp
import ldap
import ldap.filter
from flask import current_app
from flask_login import AnonymousUserMixin
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from sqlalchemy import orm
import qrcode as qrc
import qrcode.image.svg as qrc_svg
from io import BytesIO
from .base import db
from .role import Role
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from .setting import Setting
from .domain_user import DomainUser
from .account_user import AccountUser
class Anonymous(AnonymousUserMixin):
def __init__(self):
self.username = 'Anonymous'
class User(db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(64), index=True, unique=True)
password = db.Column(db.String(64))
firstname = db.Column(db.String(64))
lastname = db.Column(db.String(64))
email = db.Column(db.String(128))
otp_secret = db.Column(db.String(16))
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confirmed = db.Column(db.SmallInteger, nullable=False, default=0)
role_id = db.Column(db.Integer, db.ForeignKey('role.id'))
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role = db.relationship('Role', back_populates="users", lazy=True)
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accounts = None
def __init__(self,
id=None,
username=None,
password=None,
plain_text_password=None,
firstname=None,
lastname=None,
role_id=None,
email=None,
otp_secret=None,
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confirmed=False,
reload_info=True):
self.id = id
self.username = username
self.password = password
self.plain_text_password = plain_text_password
self.firstname = firstname
self.lastname = lastname
self.role_id = role_id
self.email = email
self.otp_secret = otp_secret
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self.confirmed = confirmed
if reload_info:
user_info = self.get_user_info_by_id(
) if id else self.get_user_info_by_username()
if user_info:
self.id = user_info.id
self.username = user_info.username
self.firstname = user_info.firstname
self.lastname = user_info.lastname
self.email = user_info.email
self.role_id = user_info.role_id
self.otp_secret = user_info.otp_secret
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self.confirmed = user_info.confirmed
def is_authenticated(self):
return True
def is_active(self):
return True
def is_anonymous(self):
return False
def get_id(self):
return str(self.id)
def __repr__(self):
return '<User {0}>'.format(self.username)
def get_totp_uri(self):
return "otpauth://totp/PowerDNS-Admin:{0}?secret={1}&issuer=PowerDNS-Admin".format(
self.username, self.otp_secret)
def verify_totp(self, token):
totp = pyotp.TOTP(self.otp_secret)
return totp.verify(token, valid_window = 5)
def get_hashed_password(self, plain_text_password=None):
# Hash a password for the first time
# (Using bcrypt, the salt is saved into the hash itself)
if plain_text_password is None:
return plain_text_password
pw = plain_text_password if plain_text_password else self.plain_text_password
return bcrypt.hashpw(pw.encode('utf-8'), bcrypt.gensalt())
def check_password(self, hashed_password):
# Check hashed password. Using bcrypt, the salt is saved into the hash itself
if hasattr(self, "plain_text_password"):
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if self.plain_text_password != None:
return bcrypt.checkpw(self.plain_text_password.encode('utf-8'),
hashed_password.encode('utf-8'))
return False
def get_user_info_by_id(self):
user_info = User.query.get(int(self.id))
return user_info
def get_user_info_by_username(self):
user_info = User.query.filter(User.username == self.username).first()
return user_info
def ldap_init_conn(self):
ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_NEVER)
conn = ldap.initialize(Setting().get('ldap_uri'))
conn.set_option(ldap.OPT_REFERRALS, ldap.OPT_OFF)
conn.set_option(ldap.OPT_PROTOCOL_VERSION, 3)
conn.set_option(ldap.OPT_X_TLS_DEMAND, True)
conn.set_option(ldap.OPT_DEBUG_LEVEL, 255)
conn.protocol_version = ldap.VERSION3
return conn
def ldap_search(self, searchFilter, baseDN, retrieveAttributes=None):
searchScope = ldap.SCOPE_SUBTREE
try:
conn = self.ldap_init_conn()
if Setting().get('ldap_type') == 'ad':
conn.simple_bind_s(
"{0}@{1}".format(self.username,
Setting().get('ldap_domain')),
self.password)
else:
conn.simple_bind_s(Setting().get('ldap_admin_username'),
Setting().get('ldap_admin_password'))
ldap_result_id = conn.search(baseDN, searchScope, searchFilter,
retrieveAttributes)
result_set = []
while 1:
result_type, result_data = conn.result(ldap_result_id, 0)
if (result_data == []):
break
else:
if result_type == ldap.RES_SEARCH_ENTRY:
result_set.append(result_data)
return result_set
except ldap.LDAPError as e:
current_app.logger.error(e)
current_app.logger.debug('baseDN: {0}'.format(baseDN))
current_app.logger.debug(traceback.format_exc())
def ldap_auth(self, ldap_username, password):
try:
conn = self.ldap_init_conn()
conn.simple_bind_s(ldap_username, password)
return True
except ldap.LDAPError as e:
current_app.logger.error(e)
return False
def is_validate(self, method, src_ip='', trust_user=False):
"""
Validate user credential
"""
role_name = 'User'
if method == 'LOCAL':
user_info = User.query.filter(
User.username == self.username).first()
if user_info:
if trust_user or (user_info.password and self.check_password(
user_info.password)):
current_app.logger.info(
'User "{0}" logged in successfully. Authentication request from {1}'
.format(self.username, src_ip))
return True
current_app.logger.error(
'User "{0}" inputted a wrong password. Authentication request from {1}'
.format(self.username, src_ip))
return False
current_app.logger.warning(
'User "{0}" does not exist. Authentication request from {1}'.
format(self.username, src_ip))
return False
if method == 'LDAP':
LDAP_TYPE = Setting().get('ldap_type')
LDAP_BASE_DN = Setting().get('ldap_base_dn')
LDAP_FILTER_BASIC = Setting().get('ldap_filter_basic')
LDAP_FILTER_USERNAME = Setting().get('ldap_filter_username')
LDAP_FILTER_GROUP = Setting().get('ldap_filter_group')
LDAP_FILTER_GROUPNAME = Setting().get('ldap_filter_groupname')
LDAP_ADMIN_GROUP = Setting().get('ldap_admin_group')
LDAP_OPERATOR_GROUP = Setting().get('ldap_operator_group')
LDAP_USER_GROUP = Setting().get('ldap_user_group')
LDAP_GROUP_SECURITY_ENABLED = Setting().get('ldap_sg_enabled')
# validate AD user password
if Setting().get('ldap_type') == 'ad' and not trust_user:
ldap_username = "{0}@{1}".format(self.username,
Setting().get('ldap_domain'))
if not self.ldap_auth(ldap_username, self.password):
current_app.logger.error(
'User "{0}" input a wrong LDAP password. Authentication request from {1}'
.format(self.username, src_ip))
return False
searchFilter = "(&({0}={1}){2})".format(LDAP_FILTER_USERNAME,
self.username,
LDAP_FILTER_BASIC)
current_app.logger.debug('Ldap searchFilter {0}'.format(searchFilter))
ldap_result = self.ldap_search(searchFilter, LDAP_BASE_DN)
current_app.logger.debug('Ldap search result: {0}'.format(ldap_result))
if not ldap_result:
current_app.logger.warning(
'LDAP User "{0}" does not exist. Authentication request from {1}'
.format(self.username, src_ip))
return False
else:
try:
ldap_username = ldap.filter.escape_filter_chars(
ldap_result[0][0][0])
if Setting().get('ldap_type') != 'ad' and not trust_user:
# validate ldap user password
if not self.ldap_auth(ldap_username, self.password):
current_app.logger.error(
'User "{0}" input a wrong LDAP password. Authentication request from {1}'
.format(self.username, src_ip))
return False
# check if LDAP_GROUP_SECURITY_ENABLED is True
# user can be assigned to ADMIN or USER role.
if LDAP_GROUP_SECURITY_ENABLED:
try:
if LDAP_TYPE == 'ldap':
groupSearchFilter = "(&({0}={1}){2})".format(LDAP_FILTER_GROUPNAME, ldap_username, LDAP_FILTER_GROUP)
current_app.logger.debug('Ldap groupSearchFilter {0}'.format(groupSearchFilter))
if (self.ldap_search(groupSearchFilter,
LDAP_ADMIN_GROUP)):
role_name = 'Administrator'
current_app.logger.info(
'User {0} is part of the "{1}" group that allows admin access to PowerDNS-Admin'
.format(self.username,
LDAP_ADMIN_GROUP))
elif (self.ldap_search(groupSearchFilter,
LDAP_OPERATOR_GROUP)):
role_name = 'Operator'
current_app.logger.info(
'User {0} is part of the "{1}" group that allows operator access to PowerDNS-Admin'
.format(self.username,
LDAP_OPERATOR_GROUP))
elif (self.ldap_search(groupSearchFilter,
LDAP_USER_GROUP)):
current_app.logger.info(
'User {0} is part of the "{1}" group that allows user access to PowerDNS-Admin'
.format(self.username,
LDAP_USER_GROUP))
else:
current_app.logger.error(
'User {0} is not part of the "{1}", "{2}" or "{3}" groups that allow access to PowerDNS-Admin'
.format(self.username,
LDAP_ADMIN_GROUP,
LDAP_OPERATOR_GROUP,
LDAP_USER_GROUP))
return False
elif LDAP_TYPE == 'ad':
ldap_admin_group_filter, ldap_operator_group, ldap_user_group = "", "", ""
if LDAP_ADMIN_GROUP:
ldap_admin_group_filter = "(memberOf:1.2.840.113556.1.4.1941:={0})".format(LDAP_ADMIN_GROUP)
if LDAP_OPERATOR_GROUP:
ldap_operator_group = "(memberOf:1.2.840.113556.1.4.1941:={0})".format(LDAP_OPERATOR_GROUP)
if LDAP_USER_GROUP:
ldap_user_group = "(memberOf:1.2.840.113556.1.4.1941:={0})".format(LDAP_USER_GROUP)
searchFilter = "(&({0}={1})(|{2}{3}{4}))".format(LDAP_FILTER_USERNAME, self.username,
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ldap_admin_group_filter,
ldap_operator_group, ldap_user_group)
ldap_result = self.ldap_search(searchFilter, LDAP_BASE_DN)
user_ad_member_of = ldap_result[0][0][1].get(
'memberOf')
if not user_ad_member_of:
current_app.logger.error(
'User {0} does not belong to any group while LDAP_GROUP_SECURITY_ENABLED is ON'
.format(self.username))
return False
user_ad_member_of = [g.decode("utf-8") for g in user_ad_member_of]
if (LDAP_ADMIN_GROUP in user_ad_member_of):
role_name = 'Administrator'
current_app.logger.info(
'User {0} is part of the "{1}" group that allows admin access to PowerDNS-Admin'
.format(self.username,
LDAP_ADMIN_GROUP))
elif (LDAP_OPERATOR_GROUP in user_ad_member_of):
role_name = 'Operator'
current_app.logger.info(
'User {0} is part of the "{1}" group that allows operator access to PowerDNS-Admin'
.format(self.username,
LDAP_OPERATOR_GROUP))
elif (LDAP_USER_GROUP in user_ad_member_of):
current_app.logger.info(
'User {0} is part of the "{1}" group that allows user access to PowerDNS-Admin'
.format(self.username,
LDAP_USER_GROUP))
else:
current_app.logger.error(
'User {0} is not part of the "{1}", "{2}" or "{3}" groups that allow access to PowerDNS-Admin'
.format(self.username,
LDAP_ADMIN_GROUP,
LDAP_OPERATOR_GROUP,
LDAP_USER_GROUP))
return False
else:
current_app.logger.error('Invalid LDAP type')
return False
except Exception as e:
current_app.logger.error(
'LDAP group lookup for user "{0}" has failed. Authentication request from {1}'
.format(self.username, src_ip))
current_app.logger.debug(traceback.format_exc())
return False
except Exception as e:
current_app.logger.error('Wrong LDAP configuration. {0}'.format(e))
current_app.logger.debug(traceback.format_exc())
return False
# create user if not exist in the db
if not User.query.filter(User.username == self.username).first():
self.firstname = self.username
self.lastname = ''
try:
# try to get user's firstname, lastname and email address from LDAP attributes
if LDAP_TYPE == 'ldap':
self.firstname = ldap_result[0][0][1]['givenName'][
0].decode("utf-8")
self.lastname = ldap_result[0][0][1]['sn'][0].decode(
"utf-8")
self.email = ldap_result[0][0][1]['mail'][0].decode(
"utf-8")
elif LDAP_TYPE == 'ad':
self.firstname = ldap_result[0][0][1]['name'][
0].decode("utf-8")
self.email = ldap_result[0][0][1]['userPrincipalName'][
0].decode("utf-8")
except Exception as e:
current_app.logger.warning(
"Reading ldap data threw an exception {0}".format(e))
current_app.logger.debug(traceback.format_exc())
# first register user will be in Administrator role
if User.query.count() == 0:
self.role_id = Role.query.filter_by(
name='Administrator').first().id
else:
self.role_id = Role.query.filter_by(
name=role_name).first().id
self.create_user()
current_app.logger.info('Created user "{0}" in the DB'.format(
self.username))
# user already exists in database, set their role based on group membership (if enabled)
if LDAP_GROUP_SECURITY_ENABLED:
self.set_role(role_name)
return True
else:
current_app.logger.error('Unsupported authentication method')
return False
def create_user(self):
"""
If user logged in successfully via LDAP in the first time
We will create a local user (in DB) in order to manage user
profile such as name, roles,...
"""
# Set an invalid password hash for non local users
self.password = '*'
db.session.add(self)
db.session.commit()
def create_local_user(self):
"""
Create local user witch stores username / password in the DB
"""
# check if username existed
user = User.query.filter(User.username == self.username).first()
if user:
return {'status': False, 'msg': 'Username is already in use'}
# check if email existed
user = User.query.filter(User.email == self.email).first()
if user:
return {'status': False, 'msg': 'Email address is already in use'}
# first register user will be in Administrator role
if self.role_id is None:
self.role_id = Role.query.filter_by(name='User').first().id
if User.query.count() == 0:
self.role_id = Role.query.filter_by(
name='Administrator').first().id
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if hasattr(self, "plain_text_password"):
if self.plain_text_password != None:
self.password = self.get_hashed_password(
self.plain_text_password)
else:
self.password = '*'
if self.password and self.password != '*':
self.password = self.password.decode("utf-8")
db.session.add(self)
db.session.commit()
return {'status': True, 'msg': 'Created user successfully'}
def update_local_user(self):
"""
Update local user
"""
# Sanity check - account name
if self.username == "":
return {'status': False, 'msg': 'No user name specified'}
# read user and check that it exists
user = User.query.filter(User.username == self.username).first()
if not user:
return {'status': False, 'msg': 'User does not exist'}
# check if new email exists (only if changed)
if user.email != self.email:
checkuser = User.query.filter(User.email == self.email).first()
if checkuser:
return {
'status': False,
'msg': 'New email address is already in use'
}
user.firstname = self.firstname
user.lastname = self.lastname
user.email = self.email
# store new password hash (only if changed)
if hasattr(self, "plain_text_password"):
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if self.plain_text_password != None:
user.password = self.get_hashed_password(
self.plain_text_password).decode("utf-8")
db.session.commit()
return {'status': True, 'msg': 'User updated successfully'}
def update_profile(self, enable_otp=None):
"""
Update user profile
"""
user = User.query.filter(User.username == self.username).first()
if not user:
return False
user.firstname = self.firstname if self.firstname else user.firstname
user.lastname = self.lastname if self.lastname else user.lastname
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if hasattr(self, "plain_text_password"):
if self.plain_text_password != None:
user.password = self.get_hashed_password(
self.plain_text_password).decode("utf-8")
if self.email:
# Can not update to a new email that
# already been used.
existing_email = User.query.filter(
User.email == self.email,
User.username != self.username).first()
if existing_email:
return False
# If need to verify new email,
# update the "confirmed" status.
if user.email != self.email:
user.email = self.email
if Setting().get('verify_user_email'):
user.confirmed = 0
if enable_otp is not None:
user.otp_secret = ""
if enable_otp == True:
# generate the opt secret key
user.otp_secret = base64.b32encode(os.urandom(10)).decode('utf-8')
try:
db.session.add(user)
db.session.commit()
return True
except Exception:
db.session.rollback()
return False
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def update_confirmed(self, confirmed):
"""
Update user email confirmation status
"""
self.confirmed = confirmed
db.session.commit()
def get_domains(self):
"""
Get list of domains which the user is granted to have
access.
Note: This doesn't include the permission granting from Account
which user belong to
"""
return self.get_domain_query().all()
def get_user_domains(self):
from ..models.base import db
from .account import Account
from .domain import Domain
from .account_user import AccountUser
from .domain_user import DomainUser
domains = db.session.query(Domain) \
.outerjoin(DomainUser, Domain.id == DomainUser.domain_id) \
.outerjoin(Account, Domain.account_id == Account.id) \
.outerjoin(AccountUser, Account.id == AccountUser.account_id) \
.filter(
db.or_(
DomainUser.user_id == self.id,
AccountUser.user_id == self.id
)).all()
return domains
def delete(self):
"""
Delete a user
"""
# revoke all user privileges first
self.revoke_privilege()
try:
User.query.filter(User.username == self.username).delete()
db.session.commit()
return True
except Exception as e:
db.session.rollback()
current_app.logger.error('Cannot delete user {0} from DB. DETAIL: {1}'.format(
self.username, e))
return False
def revoke_privilege(self, update_user=False):
"""
Revoke all privileges from a user
"""
user = User.query.filter(User.username == self.username).first()
if user:
user_id = user.id
try:
DomainUser.query.filter(DomainUser.user_id == user_id).delete()
if (update_user)==True:
AccountUser.query.filter(AccountUser.user_id == user_id).delete()
db.session.commit()
return True
except Exception as e:
db.session.rollback()
current_app.logger.error(
'Cannot revoke user {0} privileges. DETAIL: {1}'.format(
self.username, e))
return False
return False
def set_role(self, role_name):
role = Role.query.filter(Role.name == role_name).first()
if role:
user = User.query.filter(User.username == self.username).first()
user.role_id = role.id
db.session.commit()
return {'status': True, 'msg': 'Set user role successfully'}
else:
return {'status': False, 'msg': 'Role does not exist'}
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@orm.reconstructor
def set_account(self):
self.accounts = self.get_accounts()
def get_accounts(self):
"""
Get accounts associated with this user
"""
from .account import Account
from .account_user import AccountUser
accounts = []
query = db.session\
.query(
AccountUser,
Account)\
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.filter(self.id == AccountUser.user_id)\
.filter(Account.id == AccountUser.account_id)\
.order_by(Account.name)\
.all()
for q in query:
accounts.append(q[1])
return accounts
def get_qrcode_value(self):
img = qrc.make(self.get_totp_uri(),
image_factory=qrc_svg.SvgPathImage)
stream = BytesIO()
img.save(stream)
return stream.getvalue()
def read_entitlements(self, key):
"""
Get entitlements from ldap server associated with this user
"""
LDAP_BASE_DN = Setting().get('ldap_base_dn')
LDAP_FILTER_USERNAME = Setting().get('ldap_filter_username')
LDAP_FILTER_BASIC = Setting().get('ldap_filter_basic')
searchFilter = "(&({0}={1}){2})".format(LDAP_FILTER_USERNAME,
self.username,
LDAP_FILTER_BASIC)
current_app.logger.debug('Ldap searchFilter {0}'.format(searchFilter))
ldap_result = self.ldap_search(searchFilter, LDAP_BASE_DN, [key])
current_app.logger.debug('Ldap search result: {0}'.format(ldap_result))
entitlements=[]
if ldap_result:
dict=ldap_result[0][0][1]
if len(dict)!=0:
for entitlement in dict[key]:
entitlements.append(entitlement.decode("utf-8"))
else:
e="Not found value in the autoprovisioning attribute field "
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
return entitlements
def updateUser(self, Entitlements):
"""
Update user associations based on ldap attribute
"""
entitlements= getCorrectEntitlements(Entitlements)
if len(entitlements)!=0:
self.revoke_privilege(True)
for entitlement in entitlements:
arguments=entitlement.split(':')
entArgs=arguments[arguments.index('powerdns-admin')+1:]
role= entArgs[0]
self.set_role(role)
if (role=="User") and len(entArgs)>1:
current_domains=getUserInfo(self.get_user_domains())
current_accounts=getUserInfo(self.get_accounts())
domain=entArgs[1]
self.addMissingDomain(domain, current_domains)
if len(entArgs)>2:
account=entArgs[2]
self.addMissingAccount(account, current_accounts)
def addMissingDomain(self, autoprovision_domain, current_domains):
"""
Add domain gathered by autoprovisioning to the current domains list of a user
"""
from ..models.domain import Domain
user = db.session.query(User).filter(User.username == self.username).first()
if autoprovision_domain not in current_domains:
domain= db.session.query(Domain).filter(Domain.name == autoprovision_domain).first()
if domain!=None:
domain.add_user(user)
def addMissingAccount(self, autoprovision_account, current_accounts):
"""
Add account gathered by autoprovisioning to the current accounts list of a user
"""
from ..models.account import Account
user = db.session.query(User).filter(User.username == self.username).first()
if autoprovision_account not in current_accounts:
account= db.session.query(Account).filter(Account.name == autoprovision_account).first()
if account!=None:
account.add_user(user)
def getCorrectEntitlements(Entitlements):
"""
Gather a list of valid records from the ldap attribute given
"""
from ..models.role import Role
urn_value=Setting().get('urn_value')
urnArgs=[x.lower() for x in urn_value.split(':')]
entitlements=[]
for Entitlement in Entitlements:
arguments=Entitlement.split(':')
if ('powerdns-admin' in arguments):
prefix=arguments[0:arguments.index('powerdns-admin')]
prefix=[x.lower() for x in prefix]
if (prefix!=urnArgs):
e= "Typo in first part of urn value"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
continue
else:
e="Entry not a PowerDNS-Admin record"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
continue
if len(arguments)<=len(urnArgs)+1: #prefix:powerdns-admin
e="No value given after the prefix"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
continue
entArgs=arguments[arguments.index('powerdns-admin')+1:]
role=entArgs[0]
roles= Role.query.all()
role_names=get_role_names(roles)
if role not in role_names:
e="Role given by entry not a role availabe in PowerDNS-Admin. Check for spelling errors"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
continue
if len(entArgs)>1:
if (role!="User"):
e="Too many arguments for Admin or Operator"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
continue
else:
if len(entArgs)<=3:
if entArgs[1] and not checkIfDomainExists(entArgs[1]):
continue
if len(entArgs)==3:
if entArgs[2] and not checkIfAccountExists(entArgs[2]):
continue
else:
e="Too many arguments"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
continue
entitlements.append(Entitlement)
return entitlements
def checkIfDomainExists(domainName):
from ..models.domain import Domain
domain= db.session.query(Domain).filter(Domain.name == domainName)
if len(domain.all())==0:
e= domainName + " is not found in the database"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
return False
return True
def checkIfAccountExists(accountName):
from ..models.account import Account
account= db.session.query(Account).filter(Account.name == accountName)
if len(account.all())==0:
e= accountName + " is not found in the database"
current_app.logger.warning("Cannot apply autoprovisioning on user: {}".format(e))
return False
return True
def get_role_names(roles):
"""
returns all the roles available in database in string format
"""
roles_list=[]
for role in roles:
roles_list.append(role.name)
return roles_list
def getUserInfo(DomainsOrAccounts):
current=[]
for DomainOrAccount in DomainsOrAccounts:
current.append(DomainOrAccount.name)
return current