mirror of
https://github.com/wassname/flask-security.git
synced 2026-06-29 16:30:04 +08:00
Matt Wright
290 lines
11 KiB
Python
290 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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"""
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flask.ext.security.core
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~~~~~~~~~~~~~~~~~~~~~~~
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Flask-Security core module
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:copyright: (c) 2012 by Matt Wright.
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:license: MIT, see LICENSE for more details.
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"""
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from datetime import timedelta
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from flask import current_app, Blueprint
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from flask.ext.login import AnonymousUser as AnonymousUserBase, \
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UserMixin as BaseUserMixin, LoginManager, current_user
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from flask.ext.principal import Principal, RoleNeed, UserNeed, identity_loaded
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from passlib.context import CryptContext
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from werkzeug.datastructures import ImmutableList
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from . import views, exceptions, utils
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from .confirmable import confirmation_token_is_expired, requires_confirmation, \
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reset_confirmation_token
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from .decorators import login_required
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from .forms import Form, LoginForm
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#: Default Flask-Security configuration
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_default_config = {
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'URL_PREFIX': None,
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'FLASH_MESSAGES': True,
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'PASSWORD_HASH': 'plaintext',
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'AUTH_PROVIDER': 'flask.ext.security::AuthenticationProvider',
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'LOGIN_FORM': 'flask.ext.security.forms::LoginForm',
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'REGISTER_FORM': 'flask.ext.security.forms::RegisterForm',
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'RESET_PASSWORD_FORM': 'flask.ext.security.forms::ResetPasswordForm',
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'FORGOT_PASSWORD_FORM': 'flask.ext.security.forms::ForgotPasswordForm',
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'AUTH_URL': '/auth',
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'LOGOUT_URL': '/logout',
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'REGISTER_URL': '/register',
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'FORGOT_URL': '/forgot',
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'RESET_URL': '/reset',
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'CONFIRM_URL': '/confirm',
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'LOGIN_VIEW': '/login',
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'POST_LOGIN_VIEW': '/',
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'POST_LOGOUT_VIEW': '/',
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'POST_FORGOT_VIEW': '/',
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'RESET_PASSWORD_ERROR_VIEW': '/',
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'POST_REGISTER_VIEW': None,
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'POST_CONFIRM_VIEW': None,
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'DEFAULT_ROLES': [],
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'CONFIRM_EMAIL': False,
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'CONFIRM_EMAIL_WITHIN': '5 days',
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'RESET_PASSWORD_WITHIN': '2 days',
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'LOGIN_WITHOUT_CONFIRMATION': False,
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'EMAIL_SENDER': 'no-reply@localhost',
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'TOKEN_AUTHENTICATION_KEY': 'auth_token',
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'TOKEN_AUTHENTICATION_HEADER': 'X-Auth-Token'
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}
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class RoleMixin(object):
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"""Mixin for `Role` model definitions"""
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def __eq__(self, other):
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return self.name == other or self.name == getattr(other, 'name', None)
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def __ne__(self, other):
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return self.name != other and self.name != getattr(other, 'name', None)
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def __str__(self):
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return '<Role name=%s>' % self.name
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class UserMixin(BaseUserMixin):
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"""Mixin for `User` model definitions"""
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def is_active(self):
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"""Returns `True` if the user is active."""
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return self.active
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def has_role(self, role):
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"""Returns `True` if the user identifies with the specified role.
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:param role: A role name or `Role` instance"""
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return role in self.roles
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def __str__(self):
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ctx = (str(self.id), self.email)
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return '<User id=%s, email=%s>' % ctx
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class AnonymousUser(AnonymousUserBase):
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def __init__(self):
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super(AnonymousUser, self).__init__()
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self.roles = ImmutableList()
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def has_role(self, *args):
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"""Returns `False`"""
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return False
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def load_user(user_id):
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try:
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return current_app.security.datastore.with_id(user_id)
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except Exception, e:
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current_app.logger.error('Error getting user: %s' % e)
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return None
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def on_identity_loaded(sender, identity):
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if hasattr(current_user, 'id'):
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identity.provides.add(UserNeed(current_user.id))
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for role in current_user.roles:
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identity.provides.add(RoleNeed(role.name))
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identity.user = current_user
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class Security(object):
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"""The :class:`Security` class initializes the Flask-Security extension.
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:param app: The application.
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:param datastore: An instance of a user datastore.
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"""
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def __init__(self, app=None, datastore=None, **kwargs):
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self.init_app(app, datastore, **kwargs)
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def init_app(self, app, datastore, registerable=True, recoverable=True):
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"""Initializes the Flask-Security extension for the specified
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application and datastore implentation.
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:param app: The application.
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:param datastore: An instance of a user datastore.
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"""
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if app is None or datastore is None:
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return
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for key, value in _default_config.items():
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app.config.setdefault('SECURITY_' + key, value)
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login_manager = LoginManager()
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login_manager.anonymous_user = AnonymousUser
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login_manager.login_view = utils.config_value(app, 'LOGIN_VIEW')
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login_manager.user_loader(load_user)
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login_manager.init_app(app)
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Provider = utils.get_class_from_string(app, 'AUTH_PROVIDER')
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pw_hash = utils.config_value(app, 'PASSWORD_HASH')
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self.login_manager = login_manager
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self.pwd_context = CryptContext(schemes=[pw_hash], default=pw_hash)
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self.auth_provider = Provider(Form)
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self.principal = Principal(app)
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self.datastore = datastore
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self.LoginForm = utils.get_class_from_string(app, 'LOGIN_FORM')
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self.RegisterForm = utils.get_class_from_string(app, 'REGISTER_FORM')
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self.ResetPasswordForm = utils.get_class_from_string(app, 'RESET_PASSWORD_FORM')
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self.ForgotPasswordForm = utils.get_class_from_string(app, 'FORGOT_PASSWORD_FORM')
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self.auth_url = utils.config_value(app, 'AUTH_URL')
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self.logout_url = utils.config_value(app, 'LOGOUT_URL')
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self.reset_url = utils.config_value(app, 'RESET_URL')
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self.register_url = utils.config_value(app, 'REGISTER_URL')
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self.confirm_url = utils.config_value(app, 'CONFIRM_URL')
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self.forgot_url = utils.config_value(app, 'FORGOT_URL')
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self.post_login_view = utils.config_value(app, 'POST_LOGIN_VIEW')
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self.post_logout_view = utils.config_value(app, 'POST_LOGOUT_VIEW')
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self.post_register_view = utils.config_value(app, 'POST_REGISTER_VIEW')
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self.post_confirm_view = utils.config_value(app, 'POST_CONFIRM_VIEW')
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self.post_forgot_view = utils.config_value(app, 'POST_FORGOT_VIEW')
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self.reset_password_error_view = utils.config_value(app, 'RESET_PASSWORD_ERROR_VIEW')
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self.default_roles = utils.config_value(app, "DEFAULT_ROLES")
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self.login_without_confirmation = utils.config_value(app, 'LOGIN_WITHOUT_CONFIRMATION')
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self.confirm_email = utils.config_value(app, 'CONFIRM_EMAIL')
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self.email_sender = utils.config_value(app, 'EMAIL_SENDER')
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self.token_authentication_key = utils.config_value(app, 'TOKEN_AUTHENTICATION_KEY')
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self.token_authentication_header = utils.config_value(app, 'TOKEN_AUTHENTICATION_HEADER')
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self.confirm_email_within_text = utils.config_value(app, 'CONFIRM_EMAIL_WITHIN')
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values = self.confirm_email_within_text.split()
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self.confirm_email_within = timedelta(**{values[1]: int(values[0])})
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self.reset_password_within_text = utils.config_value(app, 'RESET_PASSWORD_WITHIN')
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values = self.reset_password_within_text.split()
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self.reset_password_within = timedelta(**{values[1]: int(values[0])})
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identity_loaded.connect_via(app)(on_identity_loaded)
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bp = Blueprint('flask_security', __name__, template_folder='templates')
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bp.route(self.auth_url,
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methods=['POST'],
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endpoint='authenticate')(views.authenticate)
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bp.route(self.logout_url,
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endpoint='logout')(login_required(views.logout))
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self.setup_registerable(bp) if registerable else None
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self.setup_recoverable(bp) if recoverable else None
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self.setup_confirmable(bp) if self.confirm_email else None
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app.register_blueprint(bp,
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url_prefix=utils.config_value(app, 'URL_PREFIX'))
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app.security = self
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def setup_registerable(self, bp):
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bp.route(self.register_url,
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methods=['POST'],
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endpoint='register')(views.register)
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def setup_recoverable(self, bp):
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bp.route(self.forgot_url,
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methods=['POST'],
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endpoint='forgot')(views.forgot)
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bp.route(self.reset_url,
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methods=['POST'],
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endpoint='reset')(views.reset)
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def setup_confirmable(self, bp):
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bp.route(self.confirm_url,
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endpoint='confirm')(views.confirm)
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class AuthenticationProvider(object):
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"""The default authentication provider implementation.
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:param login_form_class: The login form class to use when authenticating a
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user
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"""
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def __init__(self, login_form_class=None):
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self.login_form_class = login_form_class or LoginForm
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def login_form(self, formdata=None):
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"""Returns an instance of the login form with the provided form.
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:param formdata: The incoming form data"""
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return self.login_form_class(formdata)
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def authenticate(self, form):
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"""Processes an authentication request and returns a user instance if
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authentication is successful.
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:param form: An instance of a populated login form
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"""
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if not form.validate():
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if form.email.errors:
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raise exceptions.BadCredentialsError(form.email.errors[0])
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if form.password.errors:
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raise exceptions.BadCredentialsError(form.password.errors[0])
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return self.do_authenticate(form.email.data, form.password.data)
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def do_authenticate(self, email, password):
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"""Returns the authenticated user if authentication is successfull. If
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authentication fails an appropriate error is raised
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:param user_identifier: The user's identifier, usuall an email address
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:param password: The user's unencrypted password
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"""
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try:
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user = current_app.security.datastore.find_user(email=email)
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except AttributeError, e:
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self.auth_error("Could not find user datastore: %s" % e)
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except exceptions.UserNotFoundError, e:
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raise exceptions.BadCredentialsError("Specified user does not exist")
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except Exception, e:
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self.auth_error('Unexpected authentication error: %s' % e)
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if confirmation_token_is_expired(user):
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reset_confirmation_token(user)
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if requires_confirmation(user):
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raise exceptions.BadCredentialsError('Account requires confirmation')
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# compare passwords
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if current_app.security.pwd_context.verify(password, user.password):
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return user
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# bad match
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raise exceptions.BadCredentialsError("Password does not match")
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def auth_error(self, msg):
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"""Sends an error log message and raises an authentication error.
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:param msg: An authentication error message"""
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current_app.logger.error(msg)
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raise exceptions.AuthenticationError(msg)
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