/usr/lib/python2.7/dist-packages/sagenb/flask_version/authentication.py is in python-sagenb 0.13+ds1-2.
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import random
from flask import Blueprint, url_for, render_template, request, session, redirect, g, current_app
from decorators import with_lock
from flask_babel import gettext, ngettext, lazy_gettext
_ = gettext
authentication = Blueprint('authentication', 'sagenb.flask_version.authentication')
##################
# Authentication #
##################
@authentication.before_request
def lookup_current_user():
g.username = None
if 'username' in session:
g.username = session['username']
@authentication.route('/login', methods=['POST', 'GET'])
def login(template_dict={}):
from sagenb.misc.misc import SAGE_VERSION
template_dict.update({'accounts': g.notebook.user_manager().get_accounts(),
'recovery': g.notebook.conf()['email'],
'next': request.values.get('next', ''),
'sage_version': SAGE_VERSION,
'openid': g.notebook.conf()['openid'],
'username_error': False,
'password_error': False})
if request.method == 'POST':
username = request.form['email']
password = request.form['password']
if username == 'COOKIESDISABLED':
return _("Please enable cookies or delete all Sage cookies and localhost cookies in your browser and try again.")
# we only handle ascii usernames.
from sagenb.notebook.misc import is_valid_username, is_valid_password
if is_valid_username(username):
try:
U = g.notebook.user_manager().user(username)
except (KeyError, LookupError):
U = None
template_dict['username_error'] = True
else:
U = None
template_dict['username_error'] = True
# It is critically important that it be impossible to login as the
# pub, _sage_, or guest users. This _sage_ user is a fake user that is used
# internally by the notebook for the doc browser and other tasks.
if username in ['_sage_', 'guest', 'pub']:
U = None
template_dict['username_error'] = True
if U is None:
pass
elif (is_valid_password(password, username) and
g.notebook.user_manager().check_password(username, password)):
if U.is_suspended():
#suspended
return _("Your account is currently suspended")
else:
#Valid user, everything is okay
session['username'] = username
session.modified = True
return redirect(request.values.get('next', url_for('base.index')))
else:
template_dict['password_error'] = True
response = current_app.make_response(render_template(os.path.join('html', 'login.html'), **template_dict))
response.set_cookie('cookie_test_%s'%g.notebook.port, 'cookie_test')
return response
@authentication.route('/logout/')
def logout():
username = session.pop('username', None)
g.notebook.logout(username)
return redirect(url_for('base.index'))
################
# Registration #
################
#XXX: Yuck! This global variable should not be here.
#This is data should be stored somewhere more persistant.
waiting = {}
@authentication.route('/register', methods = ['GET','POST'])
@with_lock
def register():
if not g.notebook.user_manager().get_accounts():
return redirect(url_for('base.index'))
from sagenb.notebook.misc import is_valid_username, is_valid_password, \
is_valid_email, do_passwords_match
from sagenb.notebook.challenge import challenge
# VALIDATORS: is_valid_username, is_valid_password,
# do_passwords_match, is_valid_email,
# challenge.is_valid_response
# INPUT NAMES: username, password, retype_password, email +
# challenge fields
# TEMPLATE VARIABLES: error, username, username_missing,
# username_taken, username_invalid, password_missing,
# password_invalid, passwords_dont_match,
# retype_password_missing, email, email_missing,
# email_invalid, email_address, challenge, challenge_html,
# challenge_missing, challenge_invalid
# PRE-VALIDATION setup and hooks.
required = set(['username', 'password'])
empty = set()
validated = set()
# Template variables. We use empty_form_dict for empty forms.
empty_form_dict = {}
template_dict = {}
if g.notebook.conf()['email']:
required.add('email')
empty_form_dict['email'] = True
if g.notebook.conf()['challenge']:
required.add('challenge')
empty_form_dict['challenge'] = True
chal = challenge(g.notebook.conf(),
is_secure = g.notebook.secure,
remote_ip = request.environ['REMOTE_ADDR'])
empty_form_dict['challenge_html'] = chal.html()
template_dict.update(empty_form_dict)
# VALIDATE FIELDS.
# Username. Later, we check if a user with this username
# already exists.
username = request.values.get('username', None)
if username:
if not is_valid_username(username):
template_dict['username_invalid'] = True
elif g.notebook.user_manager().user_exists(username):
template_dict['username_taken'] = True
else:
template_dict['username'] = username
validated.add('username')
else:
template_dict['username_missing'] = True
empty.add('username')
# Password.
password = request.values.get('password', None)
retype_password = request.values.get('retype_password', None)
if password:
if not is_valid_password(password, username):
template_dict['password_invalid'] = True
elif not do_passwords_match(password, retype_password):
template_dict['passwords_dont_match'] = True
else:
validated.add('password')
else:
template_dict['password_missing'] = True
empty.add('password')
# Email address.
email_address = ''
if g.notebook.conf()['email']:
email_address = request.values.get('email', None)
if email_address:
if not is_valid_email(email_address):
template_dict['email_invalid'] = True
else:
template_dict['email_address'] = email_address
validated.add('email')
else:
template_dict['email_missing'] = True
empty.add('email')
# Challenge (e.g., reCAPTCHA).
if g.notebook.conf()['challenge']:
status = chal.is_valid_response(req_args = request.values)
if status.is_valid is True:
validated.add('challenge')
elif status.is_valid is False:
err_code = status.error_code
if err_code:
template_dict['challenge_html'] = chal.html(error_code = err_code)
else:
template_dict['challenge_invalid'] = True
else:
template_dict['challenge_missing'] = True
empty.add('challenge')
# VALIDATE OVERALL.
if empty == required:
# All required fields are empty. Not really an error.
return render_template(os.path.join('html', 'accounts', 'registration.html'),
**empty_form_dict)
elif validated != required:
# Error(s)!
errors = len(required) - len(validated)
template_dict['error'] = 'E ' if errors == 1 else 'Es '
return render_template(os.path.join('html', 'accounts', 'registration.html'),
**template_dict)
# Create an account, if username is unique.
try:
g.notebook.user_manager().add_user(username, password, email_address)
except ValueError:
template_dict['username_taken'] = True
template_dict['error'] = 'E '
form = render_template(os.path.join('html', 'accounts', 'registration.html'),
**template_dict)
return HTMLResponse(stream = form)
#XXX: Add logging support
#log.msg("Created new user '%s'"%username)
# POST-VALIDATION hooks. All required fields should be valid.
if g.notebook.conf()['email']:
from sagenb.notebook.smtpsend import send_mail
from sagenb.notebook.register import make_key, build_msg
# TODO: make this come from the server settings
key = make_key()
listenaddr = g.notebook.interface
port = g.notebook.port
fromaddr = 'no-reply@%s' % listenaddr
body = build_msg(key, username, listenaddr, port, g.notebook.secure)
# Send a confirmation message to the user.
try:
send_mail(fromaddr, email_address,
_("Sage Notebook Registration"), body)
waiting[key] = username
except ValueError:
pass
# Go to the login page.
from sagenb.misc.misc import SAGE_VERSION
template_dict = {'accounts': g.notebook.user_manager().get_accounts(),
'welcome_user': username,
'recovery': g.notebook.conf()['email'],
'sage_version': SAGE_VERSION}
return render_template(os.path.join('html', 'login.html'), **template_dict)
@authentication.route('/confirm')
@with_lock
def confirm():
if not g.notebook.conf()['email']:
return current_app.message(_('The confirmation system is not active.'))
key = int(request.values.get('key', '-1'))
invalid_confirm_key = _("""\
<h1>Invalid confirmation key</h1>
<p>You are reporting a confirmation key that has not been assigned by this
server. Please <a href="/register">register</a> with the server.</p>
""")
try:
username = waiting[key]
user = g.notebook.user(username)
user.set_email_confirmation(True)
except KeyError:
return current_app.message(invalid_confirm_key, '/register')
success = _("""<h1>Email address confirmed for user %(username)s</h1>""", username=username)
del waiting[key]
return current_app.message(success, title=_('Email Confirmed'), username=username)
@authentication.route('/forgotpass')
@with_lock
def forgot_pass():
if not g.notebook.conf()['email']:
return current_app.message(_('The account recovery system is not active.'))
username = request.values.get('username', '').strip()
if not username:
return render_template(os.path.join('html', 'accounts', 'account_recovery.html'))
def error(msg):
return current_app.message(msg, url_for('forgot_pass'))
try:
user = g.notebook.user(username)
except KeyError:
return error(_('Username is invalid.'))
if not user.is_email_confirmed():
return error(_("The e-mail address hasn't been confirmed."))
#XXX: some of this could be factored out into a random passowrd
#function. There are a few places in admin.py that also use it.
from random import choice
import string
chara = string.letters + string.digits
old_pass = user.password()
password = ''.join([choice(chara) for i in range(8)])
from sagenb.notebook.smtpsend import send_mail
from sagenb.notebook.register import build_password_msg
# TODO: make this come from the server settings
listenaddr = g.notebook.interface
port = g.notebook.port
fromaddr = 'no-reply@%s' % listenaddr
body = build_password_msg(password, username, listenaddr, port, g.notebook.secure)
destaddr = user.get_email()
try:
send_mail(fromaddr, destaddr, _("Sage Notebook Account Recovery"), body)
except ValueError:
# the email address is invalid
return error(_("The new password couldn't be sent to %(dest)s.", dest=destaddr))
else:
g.notebook.user_manager().set_password(username, password)
return current_app.message(_("A new password has been sent to your e-mail address."), url_for('base.index'))
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