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models.py
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models.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2011, 2012, 2014 CERN.
#
# Invenio is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# Invenio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Access database models."""
# General imports.
from cPickle import dumps, loads
from datetime import datetime, timedelta
from random import random
from sqlalchemy import bindparam
from sqlalchemy.orm import validates, column_property, undefer
from invenio.base.wrappers import lazy_import
from invenio.ext.sqlalchemy import db
from invenio.ext.sqlalchemy.utils import session_manager
from invenio.utils.hash import md5
from .errors import (
InvenioWebAccessMailCookieError, InvenioWebAccessMailCookieDeletedError)
SUPERADMINROLE = lazy_import(
'invenio.modules.access.local_config.SUPERADMINROLE')
CFG_ACC_ACTIVITIES_URLS = lazy_import(
'invenio.modules.access.local_config.CFG_ACC_ACTIVITIES_URLS')
# Create your models here.
from invenio.modules.accounts.models import User
class AccACTION(db.Model):
"""Represent an access action."""
__tablename__ = 'accACTION'
id = db.Column(db.Integer(15, unsigned=True),
primary_key=True, autoincrement=True)
name = db.Column(db.String(32), unique=True, nullable=True)
description = db.Column(db.String(255), nullable=True)
allowedkeywords = db.Column(db.String(255), nullable=True)
optional = db.Column(db.Enum('yes', 'no', name='yes_no'), nullable=False,
server_default='no')
def __repr__(self):
return "{0.name}".format(self)
class AccARGUMENT(db.Model):
"""Represent an authorization argument."""
__tablename__ = 'accARGUMENT'
id = db.Column(db.Integer(15), primary_key=True, autoincrement=True)
keyword = db.Column(db.String(32), nullable=True)
value = db.Column(db.String(255), nullable=True)
__table_args__ = (db.Index('KEYVAL', keyword, value),
db.Model.__table_args__)
def __repr__(self):
return "{0.keyword}={0.value}".format(self)
class AccMAILCOOKIE(db.Model):
"""Represent an email cookie."""
__tablename__ = 'accMAILCOOKIE'
AUTHORIZATIONS_KIND = (
'pw_reset', 'mail_activation', 'role', 'authorize_action',
'comment_msg', 'generic'
)
id = db.Column(db.Integer(15, unsigned=True), primary_key=True,
autoincrement=True)
_data = db.Column('data', db.iBinary, nullable=False)
expiration = db.Column(db.DateTime, nullable=False,
server_default='9999-12-31 23:59:59', index=True)
kind = db.Column(db.String(32), nullable=False)
onetime = db.Column(db.TinyInteger(1), nullable=False, server_default='0')
status = db.Column(db.Char(1), nullable=False, server_default='W')
@validates('kind')
def validate_kind(self, key, kind):
"""Validate cookie kind."""
assert kind in self.AUTHORIZATIONS_KIND
return kind
@classmethod
def get(cls, cookie, delete=False):
"""Get cookie if it is valid."""
password = cookie[:16]+cookie[-16:]
cookie_id = int(cookie[16:-16], 16)
obj, data = db.session.query(
cls,
db.func.aes_decrypt(
cls._data, bindparam('password')
).label('decrypted')
).params(password=password).filter_by(id=cookie_id).one()
obj.data = loads(data)
(kind_check, params, expiration, onetime_check) = obj.data
assert obj.kind in cls.AUTHORIZATIONS_KIND
if not (obj.kind == kind_check and obj.onetime == onetime_check):
raise InvenioWebAccessMailCookieError("Cookie is corrupted")
if obj.status == 'D':
raise InvenioWebAccessMailCookieDeletedError(
"Cookie has been deleted")
if obj.onetime or delete:
obj.status = 'D'
db.session.merge(obj)
db.session.commit()
return obj
@classmethod
def create(cls, kind, params, cookie_timeout=timedelta(days=1),
onetime=False):
"""Create cookie with given params."""
expiration = datetime.today() + cookie_timeout
data = (kind, params, expiration, onetime)
password = md5(str(random())).hexdigest()
cookie = cls(
expiration=expiration,
kind=kind,
onetime=int(onetime),
)
cookie._data = db.func.aes_encrypt(dumps(data), password)
db.session.add(cookie)
db.session.commit()
db.session.refresh(cookie)
return password[:16]+hex(cookie.id)[2:-1]+password[-16:]
@classmethod
@session_manager
def gc(cls):
"""Remove expired items."""
return cls.query.filter(cls.expiration<db.func.now()).delete()
class AccROLE(db.Model):
"""Represent an access role."""
__tablename__ = 'accROLE'
id = db.Column(db.Integer(15, unsigned=True), primary_key=True,
autoincrement=True)
name = db.Column(db.String(32), unique=True, nullable=True)
description = db.Column(db.String(255), nullable=True)
firerole_def_ser = db.Column(db.iBinary, nullable=True)
firerole_def_src = db.Column(db.Text, nullable=True)
def __repr__(self):
return "{0.name} - {0.description}".format(self)
class AccAuthorization(db.Model):
"""Represent an authorization."""
__tablename__ = 'accROLE_accACTION_accARGUMENT'
id_accROLE = db.Column(db.Integer(15, unsigned=True),
db.ForeignKey(AccROLE.id), nullable=True,
autoincrement=False, primary_key=True, index=True)
id_accACTION = db.Column(db.Integer(15, unsigned=True),
db.ForeignKey(AccACTION.id), nullable=True,
autoincrement=False, primary_key=True, index=True)
id_accARGUMENT = db.Column(db.Integer(15), db.ForeignKey(AccARGUMENT.id),
nullable=True, primary_key=True,
autoincrement=False, index=True)
argumentlistid = db.Column(db.MediumInteger(8), nullable=True,
autoincrement=False, primary_key=True)
role = db.relationship(AccROLE, backref='authorizations')
action = db.relationship(AccACTION, backref='authorizations')
argument = db.relationship(AccARGUMENT, backref='authorizations')
class UserAccROLE(db.Model):
"""Represent an user role relationship."""
__tablename__ = 'user_accROLE'
id_user = db.Column(db.Integer(15, unsigned=True), db.ForeignKey(User.id),
nullable=False, primary_key=True)
id_accROLE = db.Column(db.Integer(15, unsigned=True),
db.ForeignKey(AccROLE.id), nullable=False,
primary_key=True)
expiration = db.Column(db.DateTime, nullable=False,
server_default='9999-12-31 23:59:59')
user = db.relationship(User, backref='roles')
role = db.relationship(AccROLE, backref='users')
User.active_roles = db.relationship(
UserAccROLE,
lazy="dynamic",
primaryjoin=db.and_(
User.id == UserAccROLE.id_user,
UserAccROLE.expiration >= db.func.now()
)
)
User.has_admin_role = property(lambda self:
self.has_super_admin_role or db.object_session(self).query(
db.func.count(User.id)>0
).join(
User.active_roles,
UserAccROLE.role,
AccROLE.authorizations
).filter(
AccAuthorization.id_accACTION.in_(
db.select([AccACTION.id]).where(
AccACTION.name.in_(CFG_ACC_ACTIVITIES_URLS.keys())
)
),
User.id == self.id
).scalar()
)
User.has_super_admin_role = property(lambda self:
db.object_session(self).query(db.func.count(User.id)>0).join(
User.active_roles,
UserAccROLE.role
).filter(
AccROLE.name == SUPERADMINROLE,
User.id == self.id
).scalar()
)
__all__ = ('AccACTION',
'AccARGUMENT',
'AccMAILCOOKIE',
'AccROLE',
'AccAuthorization',
'UserAccROLE')

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