460 lines
16 KiB
Python
460 lines
16 KiB
Python
# -*- coding: UTF-8 -*
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"""Users and Roles models for ScoDoc
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"""
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import base64
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from datetime import datetime, timedelta
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import os
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import re
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from time import time
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from typing import Optional
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import cracklib # pylint: disable=import-error
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from flask import current_app, url_for, g
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from flask_login import UserMixin, AnonymousUserMixin
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from werkzeug.security import generate_password_hash, check_password_hash
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import jwt
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from app import db, login
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from app.scodoc.sco_exceptions import ScoValueError
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from app.scodoc.sco_permissions import Permission
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from app.scodoc.sco_roles_default import SCO_ROLES_DEFAULTS
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import app.scodoc.sco_utils as scu
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from app.scodoc import sco_etud # a deplacer dans scu
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VALID_LOGIN_EXP = re.compile(r"^[a-zA-Z0-9@\\\-_\.]+$")
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def is_valid_password(cleartxt):
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"""Check password.
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returns True if OK.
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"""
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if (
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hasattr(scu.CONFIG, "MIN_PASSWORD_LENGTH")
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and scu.CONFIG.MIN_PASSWORD_LENGTH > 0
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and len(cleartxt) < scu.CONFIG.MIN_PASSWORD_LENGTH
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):
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return False # invalid: too short
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try:
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_ = cracklib.FascistCheck(cleartxt)
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return True
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except ValueError:
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return False
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class User(UserMixin, db.Model):
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"""ScoDoc users, handled by Flask / SQLAlchemy"""
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id = db.Column(db.Integer, primary_key=True)
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user_name = db.Column(db.String(64), index=True, unique=True)
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email = db.Column(db.String(120))
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nom = db.Column(db.String(64))
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prenom = db.Column(db.String(64))
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dept = db.Column(db.String(32), index=True)
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active = db.Column(db.Boolean, default=True, index=True)
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password_hash = db.Column(db.String(128))
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password_scodoc7 = db.Column(db.String(42))
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last_seen = db.Column(db.DateTime, default=datetime.utcnow)
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date_modif_passwd = db.Column(db.DateTime, default=datetime.utcnow)
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date_created = db.Column(db.DateTime, default=datetime.utcnow)
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date_expiration = db.Column(db.DateTime, default=None)
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passwd_temp = db.Column(db.Boolean, default=False)
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token = db.Column(db.String(32), index=True, unique=True)
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token_expiration = db.Column(db.DateTime)
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roles = db.relationship("Role", secondary="user_role", viewonly=True)
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Permission = Permission
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def __init__(self, **kwargs):
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self.roles = []
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self.user_roles = []
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# check login:
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if kwargs.get("user_name") and not VALID_LOGIN_EXP.match(kwargs["user_name"]):
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raise ValueError(f"invalid user_name: {kwargs['user_name']}")
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super(User, self).__init__(**kwargs)
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# Ajoute roles:
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if (
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not self.roles
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and self.email
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and self.email == current_app.config["SCODOC_ADMIN_MAIL"]
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):
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# super-admin
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admin_role = Role.query.filter_by(name="SuperAdmin").first()
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assert admin_role
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self.add_role(admin_role, None)
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db.session.commit()
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# current_app.logger.info("creating user with roles={}".format(self.roles))
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def __repr__(self):
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return f"<User {self.user_name} id={self.id} dept={self.dept}{' (inactive)' if not self.active else ''}>"
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def __str__(self):
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return self.user_name
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def set_password(self, password):
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"Set password"
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current_app.logger.info(f"set_password({self})")
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if password:
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self.password_hash = generate_password_hash(password)
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else:
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self.password_hash = None
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def check_password(self, password):
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"""Check given password vs current one.
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Returns `True` if the password matched, `False` otherwise.
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"""
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if not self.active: # inactived users can't login
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return False
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if (not self.password_hash) and self.password_scodoc7:
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# Special case: user freshly migrated from ScoDoc7
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if scu.check_scodoc7_password(self.password_scodoc7, password):
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current_app.logger.warning(
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f"migrating legacy ScoDoc7 password for {self}"
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)
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self.set_password(password)
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self.password_scodoc7 = None
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db.session.add(self)
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db.session.commit()
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return True
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return False
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if not self.password_hash: # user without password can't login
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return False
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return check_password_hash(self.password_hash, password)
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def get_reset_password_token(self, expires_in=600):
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return jwt.encode(
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{"reset_password": self.id, "exp": time() + expires_in},
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current_app.config["SECRET_KEY"],
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algorithm="HS256",
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)
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@staticmethod
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def verify_reset_password_token(token):
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try:
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id = jwt.decode(
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token, current_app.config["SECRET_KEY"], algorithms=["HS256"]
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)["reset_password"]
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except:
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return
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return User.query.get(id)
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def to_dict(self, include_email=True):
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data = {
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"date_expiration": self.date_expiration.isoformat() + "Z"
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if self.date_expiration
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else "",
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"date_modif_passwd": self.date_modif_passwd.isoformat() + "Z"
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if self.date_modif_passwd
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else "",
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"date_created": self.date_created.isoformat() + "Z"
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if self.date_created
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else "",
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"dept": (self.dept or ""), # sco8
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"id": self.id,
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"active": self.active,
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"status_txt": "actif" if self.active else "fermé",
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"last_seen": self.last_seen.isoformat() + "Z",
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"nom": (self.nom or ""), # sco8
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"prenom": (self.prenom or ""), # sco8
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"roles_string": self.get_roles_string(), # eg "Ens_RT, Ens_Info"
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"user_name": self.user_name, # sco8
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# Les champs calculés:
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"nom_fmt": self.get_nom_fmt(),
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"prenom_fmt": self.get_prenom_fmt(),
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"nomprenom": self.get_nomprenom(),
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"prenomnom": self.get_prenomnom(),
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"nomplogin": self.get_nomplogin(),
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"nomcomplet": self.get_nomcomplet(),
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}
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if include_email:
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data["email"] = self.email or ""
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return data
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def from_dict(self, data, new_user=False):
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"""Set users' attributes from given dict values.
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Roles must be encoded as "roles_string", like "Ens_RT, Secr_CJ"
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"""
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for field in ["nom", "prenom", "dept", "active", "email", "date_expiration"]:
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if field in data:
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setattr(self, field, data[field] or None)
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if new_user:
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if "user_name" in data:
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# never change name of existing users
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self.user_name = data["user_name"]
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if "password" in data:
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self.set_password(data["password"])
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if not VALID_LOGIN_EXP.match(self.user_name):
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raise ValueError(f"invalid user_name: {self.user_name}")
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# Roles: roles_string is "Ens_RT, Secr_RT, ..."
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if "roles_string" in data:
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self.user_roles = []
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for r_d in data["roles_string"].split(","):
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if r_d:
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role, dept = UserRole.role_dept_from_string(r_d)
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self.add_role(role, dept)
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def get_token(self, expires_in=3600):
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now = datetime.utcnow()
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if self.token and self.token_expiration > now + timedelta(seconds=60):
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return self.token
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self.token = base64.b64encode(os.urandom(24)).decode("utf-8")
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self.token_expiration = now + timedelta(seconds=expires_in)
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db.session.add(self)
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return self.token
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def revoke_token(self):
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self.token_expiration = datetime.utcnow() - timedelta(seconds=1)
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@staticmethod
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def check_token(token):
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user = User.query.filter_by(token=token).first()
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if user is None or user.token_expiration < datetime.utcnow():
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return None
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return user
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# Permissions management:
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def has_permission(self, perm: int, dept=False):
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"""Check if user has permission `perm` in given `dept`.
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Similar to Zope ScoDoc7 `has_permission``
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Args:
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perm: integer, one of the value defined in Permission class.
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dept: dept id (eg 'RT'), default to current departement.
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"""
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if not self.active:
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return False
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if dept is False:
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dept = g.scodoc_dept
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# les role liés à ce département, et les roles avec dept=None (super-admin)
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roles_in_dept = (
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UserRole.query.filter_by(user_id=self.id)
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.filter((UserRole.dept == dept) | (UserRole.dept == None))
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.all()
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)
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for user_role in roles_in_dept:
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if user_role.role.has_permission(perm):
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return True
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return False
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# Role management
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def add_role(self, role, dept):
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"""Add a role to this user.
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:param role: Role to add.
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"""
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self.user_roles.append(UserRole(user=self, role=role, dept=dept))
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def add_roles(self, roles, dept):
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"""Add roles to this user.
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:param roles: Roles to add.
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"""
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for role in roles:
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self.add_role(role, dept)
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def set_roles(self, roles, dept):
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"set roles in the given dept"
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self.user_roles = [UserRole(user=self, role=r, dept=dept) for r in roles]
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def get_roles(self):
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"iterator on my roles"
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for role in self.roles:
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yield role
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def get_roles_string(self):
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"""string repr. of user's roles (with depts)
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e.g. "Ens_RT, Ens_Info, Secr_CJ"
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"""
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return ",".join(f"{r.role.name}_{r.dept or ''}" for r in self.user_roles)
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def is_administrator(self):
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"True if i'm an active SuperAdmin"
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return self.active and self.has_permission(Permission.ScoSuperAdmin, dept=None)
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# Some useful strings:
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def get_nomplogin(self):
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"""nomplogin est le nom en majuscules suivi du prénom et du login
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e.g. Dupont Pierre (dupont)
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"""
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if self.nom:
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n = sco_etud.format_nom(self.nom)
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else:
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n = self.user_name.upper()
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return "%s %s (%s)" % (
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n,
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sco_etud.format_prenom(self.prenom),
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self.user_name,
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)
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@staticmethod
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def get_user_id_from_nomplogin(nomplogin: str) -> Optional[int]:
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"""Returns id from the string "Dupont Pierre (dupont)"
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or None if user does not exist
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"""
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m = re.match(r".*\((.*)\)", nomplogin.strip())
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if m:
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user_name = m.group(1)
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u = User.query.filter_by(user_name=user_name).first()
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if u:
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return u.id
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return None
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def get_nom_fmt(self):
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"""Nom formatté: "Martin" """
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if self.nom:
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return sco_etud.format_nom(self.nom, uppercase=False)
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else:
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return self.user_name
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def get_prenom_fmt(self):
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"""Prénom formaté (minuscule capitalisées)"""
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return sco_etud.format_prenom(self.prenom)
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def get_nomprenom(self):
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"""Nom capitalisé suivi de l'initiale du prénom:
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Viennet E.
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"""
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prenom_abbrv = scu.abbrev_prenom(sco_etud.format_prenom(self.prenom))
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return (self.get_nom_fmt() + " " + prenom_abbrv).strip()
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def get_prenomnom(self):
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"""L'initiale du prénom suivie du nom: "J.-C. Dupont" """
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prenom_abbrv = scu.abbrev_prenom(sco_etud.format_prenom(self.prenom))
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return (prenom_abbrv + " " + self.get_nom_fmt()).strip()
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def get_nomcomplet(self):
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"Prénom et nom complets"
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return sco_etud.format_prenom(self.prenom) + " " + self.get_nom_fmt()
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# nomnoacc était le nom en minuscules sans accents (inutile)
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class AnonymousUser(AnonymousUserMixin):
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def has_permission(self, perm, dept=None):
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return False
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def is_administrator(self):
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return False
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login.anonymous_user = AnonymousUser
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class Role(db.Model):
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"""Roles for ScoDoc"""
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id = db.Column(db.Integer, primary_key=True)
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name = db.Column(db.String(64), unique=True) # TODO: , nullable=False))
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default = db.Column(db.Boolean, default=False, index=True)
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permissions = db.Column(db.BigInteger) # 64 bits
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users = db.relationship("User", secondary="user_role", viewonly=True)
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# __table_args__ = (db.UniqueConstraint("name", "dept", name="_rolename_dept_uc"),)
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def __init__(self, **kwargs):
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super(Role, self).__init__(**kwargs)
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if self.permissions is None:
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self.permissions = 0
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def __repr__(self):
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return "<Role {} perm={:0{w}b}>".format(
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self.name,
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self.permissions & ((1 << Permission.NBITS) - 1),
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w=Permission.NBITS,
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)
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def add_permission(self, perm):
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self.permissions |= perm
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def remove_permission(self, perm):
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self.permissions = self.permissions & ~perm
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def reset_permissions(self):
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self.permissions = 0
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def has_permission(self, perm):
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return self.permissions & perm == perm
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@staticmethod
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def insert_roles():
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"""Create default roles"""
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default_role = "Observateur"
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for role_name, permissions in SCO_ROLES_DEFAULTS.items():
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role = Role.query.filter_by(name=role_name).first()
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if role is None:
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role = Role(name=role_name)
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role.reset_permissions()
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for perm in permissions:
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role.add_permission(perm)
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role.default = role.name == default_role
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db.session.add(role)
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db.session.commit()
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@staticmethod
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def get_named_role(name):
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"""Returns existing role with given name, or None."""
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return Role.query.filter_by(name=name).first()
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class UserRole(db.Model):
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"""Associate user to role, in a dept.
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If dept is None, the role applies to all departments (eg super admin).
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"""
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id = db.Column(db.Integer, primary_key=True)
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user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
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role_id = db.Column(db.Integer, db.ForeignKey("role.id"))
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dept = db.Column(db.String(64)) # dept acronym ou NULL
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user = db.relationship(
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User, backref=db.backref("user_roles", cascade="all, delete-orphan")
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)
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role = db.relationship(
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Role, backref=db.backref("user_roles", cascade="all, delete-orphan")
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)
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def __repr__(self):
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return "<UserRole u={} r={} dept={}>".format(self.user, self.role, self.dept)
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@staticmethod
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def role_dept_from_string(role_dept: str):
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"""Return tuple (role, dept) from the string
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role_dept, of the forme "Role_Dept".
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role is a Role instance, dept is a string, or None.
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"""
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fields = role_dept.split("_", 1) # maxsplit=1, le dept peut contenir un "_"
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if len(fields) != 2:
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current_app.logger.warning(
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f"role_dept_from_string: Invalid role_dept '{role_dept}'"
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)
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raise ScoValueError("Invalid role_dept")
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role_name, dept = fields
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if dept == "":
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dept = None
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role = Role.query.filter_by(name=role_name).first()
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if role is None:
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raise ScoValueError("role %s does not exists" % role_name)
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return (role, dept)
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def get_super_admin():
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"""L'utilisateur admin (ou le premier, s'il y en a plusieurs).
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Utilisé par les tests unitaires et le script de migration.
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"""
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admin_role = Role.query.filter_by(name="SuperAdmin").first()
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assert admin_role
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admin_user = (
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User.query.join(UserRole)
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.filter((UserRole.user_id == User.id) & (UserRole.role_id == admin_role.id))
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.first()
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)
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assert admin_user
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return admin_user
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@login.user_loader
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def load_user(id):
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return User.query.get(int(id))
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