/
emailtoken.py
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/
emailtoken.py
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# -*- coding: utf-8 -*-
# 2018-10-31 Cornelius Kölbel <cornelius.koelbel@netknights.it>
# Let the client choose to get a HTTP 500 Error code if
# SMS fails.
# 2018-02-16 Cornelius Kölbel <cornelius.koelbel@netknights.it>
# Add dynamic email address. Dynamically read from user source.
# 2018-01-21 Cornelius Kölbel <cornelius.koelbel@netknights.it>
# Add email templates
# 2015-12-29 Cornelius Kölbel <cornelius.koelbel@netknights.it>
# Use privacyidea.lib.smtpserver instead of smtplib
# 2015-10-12 Cornelius Kölbel <cornelius.koelbel@netknights.it>
# Add test config function
# 2015-04-14 Cornelius Kölbel <cornelius.koelbel@netknights.it>
# Adapt code to work with privacyIDEA 2 (Flask)
#
# privacyIDEA is a fork of LinOTP
# May 08, 2014 Cornelius Kölbel
# License: AGPLv3
# contact: http://www.privacyidea.org
#
# Copyright (C) 2010 - 2014 LSE Leading Security Experts GmbH
# License: LSE
# contact: http://www.linotp.org
# http://www.lsexperts.de
# linotp@lsexperts.de
#
# This code is free software; you can redistribute it and/or
# modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
# License as published by the Free Software Foundation; either
# version 3 of the License, or any later version.
#
# This code 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 AFFERO GENERAL PUBLIC LICENSE for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with this program. If not, see <http://www.gnu.org/licenses/>.
#
__doc__ = """This is the implementation of an Email-Token, that sends OTP
values via SMTP.
The following config entries are used:
* email.validtime
* email.identifier
The identifier points to a system wide SMTP server configuration.
See :ref:`rest_smtpserver`.
The system wide SMTP server configuration was introduced in version 2.10.
In privacyIDEA up to version 2.9 the following config entries were used:
* email.validtime
* email.mailserver
* email.port
* email.username
* email.password
* email.mailfrom
* email.subject
* email.tls
policy: action: emailtext
The code is tested in tests/test_lib_tokens_email
"""
import logging
import traceback
import datetime
from privacyidea.lib.tokens.smstoken import HotpTokenClass
from privacyidea.lib.config import get_from_config
from privacyidea.api.lib.utils import getParam
from privacyidea.lib.utils import is_true, create_tag_dict
from privacyidea.lib.policy import SCOPE, ACTION, GROUP, get_action_values_from_options
from privacyidea.lib.policy import Match
from privacyidea.lib.log import log_with
from privacyidea.lib import _
from privacyidea.models import Challenge
from privacyidea.lib.decorators import check_token_locked
from privacyidea.lib.smtpserver import send_email_data, send_email_identifier
log = logging.getLogger(__name__)
TEST_SUCCESSFUL = "Successfully sent email. Please check your inbox."
class EMAILACTION(object):
EMAILTEXT = "emailtext"
EMAILSUBJECT = "emailsubject"
EMAILAUTO = "emailautosend"
class EmailTokenClass(HotpTokenClass):
"""
Implementation of the EMail Token Class, that sends OTP values via SMTP.
(Similar to SMSTokenClass)
"""
EMAIL_ADDRESS_KEY = "email"
def __init__(self, aToken):
HotpTokenClass.__init__(self, aToken)
self.set_type(u"email")
self.mode = ['challenge']
# we support various hashlib methods, but only on create
# which is effectively set in the update
self.hashlibStr = get_from_config("hotp.hashlib", "sha1")
@property
def _email_address(self):
if is_true(self.get_tokeninfo("dynamic_email")):
email = self.user.info.get(self.EMAIL_ADDRESS_KEY)
if type(email) == list and email:
# If there is a non-empty list, we use the first entry
email = email[0]
else:
email = self.get_tokeninfo(self.EMAIL_ADDRESS_KEY)
if not email: # pragma: no cover
log.warning("Token {0!s} does not have an email address!".format(self.token.serial))
return email
@_email_address.setter
def _email_address(self, value):
self.add_tokeninfo(self.EMAIL_ADDRESS_KEY, value)
@staticmethod
def get_class_type():
"""
return the generic token class identifier
"""
return "email"
@staticmethod
def get_class_prefix():
return "PIEM"
@staticmethod
def get_class_info(key=None, ret='all'):
"""
returns all or a subtree of the token definition
:param key: subsection identifier
:type key: string
:param ret: default return value, if nothing is found
:type ret: user defined
:return: subsection if key exists or user defined
:rtype : s.o.
"""
res = {'type': 'email',
'title': _('EMail Token'),
'description':
_('EMail: Send a One Time Password to the users email '
'address.'),
'user': ['enroll'],
# This tokentype is enrollable in the UI for...
'ui_enroll': ["admin", "user"],
'policy': {SCOPE.AUTH: {
EMAILACTION.EMAILTEXT: {
'type': 'str',
'desc': _('The text that will be sent via EMail for'
' an EMail token. Use <otp> and <serial> '
'as parameters. You may also specify a filename '
'as email template starting with "file:".')},
EMAILACTION.EMAILSUBJECT: {
'type': 'str',
'desc': _('The subject of the EMail for'
' an EMail token. Use <otp> and <serial> '
'as parameters.')},
EMAILACTION.EMAILAUTO: {
'type': 'bool',
'desc': _('If set, a new EMail OTP will be sent '
'after successful authentication with '
'one EMail OTP.')},
ACTION.CHALLENGETEXT: {
'type': 'str',
'desc': _('Use an alternate challenge text for telling the '
'user to enter the code from the eMail.')
},
},
SCOPE.ENROLL: {
ACTION.MAXTOKENUSER: {
'type': 'int',
'desc': _("The user may only have this maximum number of email tokens assigned."),
'group': GROUP.TOKEN
},
ACTION.MAXACTIVETOKENUSER: {
'type': 'int',
'desc': _("The user may only have this maximum number of active email tokens assigned."),
'group': GROUP.TOKEN
}
}
}
}
if key:
ret = res.get(key, {})
else:
if ret == 'all':
ret = res
return ret
@log_with(log)
def update(self, param, reset_failcount=True):
"""
update - process initialization parameters
:param param: dict of initialization parameters
:type param: dict
:return: nothing
"""
if getParam(param, "dynamic_email", optional=True):
self.add_tokeninfo("dynamic_email", True)
else:
# specific - e-mail
self._email_address = getParam(param,
self.EMAIL_ADDRESS_KEY,
optional=False)
# in case of the e-mail token, only the server must know the otpkey
# thus if none is provided, we let create one (in the TokenClass)
if 'genkey' not in param and 'otpkey' not in param:
param['genkey'] = 1
HotpTokenClass.update(self, param, reset_failcount)
return
@log_with(log)
def is_challenge_request(self, passw, user=None, options=None):
"""
check, if the request would start a challenge
We need to define the function again, to get rid of the
is_challenge_request-decorator of the HOTP-Token
:param passw: password, which might be pin or pin+otp
:param options: dictionary of additional request parameters
:return: returns true or false
"""
return self.check_pin(passw, user=user, options=options)
@log_with(log)
def create_challenge(self, transactionid=None, options=None):
"""
create a challenge, which is submitted to the user
:param transactionid: the id of this challenge
:param options: the request context parameters / data
You can pass exception=1 to raise an exception, if
the SMS could not be sent. Otherwise the message is contained in the response.
:return: tuple of (bool, message and data)
bool, if submit was successful
message is submitted to the user
data is preserved in the challenge
attributes - additional attributes, which are displayed in the
output
"""
success = False
options = options or {}
return_message = get_action_values_from_options(SCOPE.AUTH,
"{0!s}_{1!s}".format(self.get_class_type(),
ACTION.CHALLENGETEXT),
options) or _("Enter the OTP from the Email:")
attributes = {'state': transactionid}
validity = int(get_from_config("email.validtime", 120))
if self.is_active() is True:
counter = self.get_otp_count()
log.debug("counter={0!r}".format(counter))
self.inc_otp_counter(counter, reset=False)
# At this point we must not bail out in case of an
# Gateway error, since checkPIN is successful. A bail
# out would cancel the checking of the other tokens
try:
message_template, mimetype = self._get_email_text_or_subject(options)
subject_template, _n = self._get_email_text_or_subject(options,
EMAILACTION.EMAILSUBJECT,
"Your OTP")
# Create the challenge in the database
if is_true(get_from_config("email.concurrent_challenges")):
data = self.get_otp()[2]
else:
data = None
db_challenge = Challenge(self.token.serial,
transaction_id=transactionid,
challenge=options.get("challenge"),
data=data,
session=options.get("session"),
validitytime=validity)
db_challenge.save()
transactionid = transactionid or db_challenge.transaction_id
# We send the email after creating the challenge for testing.
success, sent_message = self._compose_email(
message=message_template,
subject=subject_template,
mimetype=mimetype)
except Exception as e:
info = ("The PIN was correct, but the "
"EMail could not be sent: %r" % e)
log.warning(info)
log.debug(u"{0!s}".format(traceback.format_exc()))
return_message = info
if is_true(options.get("exception")):
raise Exception(info)
expiry_date = datetime.datetime.now() + \
datetime.timedelta(seconds=validity)
attributes['valid_until'] = "{0!s}".format(expiry_date)
return success, return_message, transactionid, attributes
@log_with(log)
@check_token_locked
def check_otp(self, anOtpVal, counter=None, window=None, options=None):
"""
check the otpval of a token against a given counter
and the window
:param passw: the to be verified passw/pin
:type passw: string
:return: counter if found, -1 if not found
:rtype: int
"""
options = options or {}
ret = HotpTokenClass.check_otp(self, anOtpVal, counter, window, options)
if ret < 0 and is_true(get_from_config("email.concurrent_challenges")):
if options.get("data") == anOtpVal:
# We authenticate from the saved challenge
ret = 1
if ret >= 0 and self._get_auto_email(options):
message, mimetype = self._get_email_text_or_subject(options)
subject, _ = self._get_email_text_or_subject(options,
action=EMAILACTION.EMAILSUBJECT,
default="Your OTP")
self.inc_otp_counter(ret, reset=False)
success, message = self._compose_email(message=message,
subject=subject,
mimetype=mimetype)
log.debug("AutoEmail: send new SMS: {0!s}".format(success))
log.debug("AutoEmail: {0!r}".format(message))
return ret
@staticmethod
def _get_email_text_or_subject(options,
action=EMAILACTION.EMAILTEXT,
default="<otp>"):
"""
This returns the EMAILTEXT or EMAILSUBJECT from the policy
"emailtext" or "emailsubject
:param options: contains user and g object.
:type options: dict
:param action: The action - either emailtext or emailsubject
:param default: If no policy can be found, this is the default text
:return: Message template, MIME type (one of "plain", "html")
:rtype: (basestring, basestring)
"""
message = default
mimetype = "plain"
g = options.get("g")
user_object = options.get("user")
if g:
messages = Match.user(g, scope=SCOPE.AUTH, action=action, user_object=user_object if user_object else None)\
.action_values(unique=True, allow_white_space_in_action=True)
if len(messages) == 1:
message = list(messages)[0]
message = message.format(challenge=options.get("challenge"))
if message.startswith("file:"):
# We read the template from the file.
try:
with open(message[5:], "r") as f:
message = f.read()
mimetype = "html"
except Exception as e: # pragma: no cover
message = default
log.warning(u"Failed to read email template: {0!r}".format(e))
log.debug(u"{0!s}".format(traceback.format_exc()))
return message, mimetype
@staticmethod
def _get_auto_email(options):
"""
This returns the AUTOEMAIL setting.
:param options: contains user and g object.
:optins type: dict
:return: True if an SMS should be sent automatically
:rtype: bool
"""
autosms = False
g = options.get("g")
user_object = options.get("user")
if g:
autoemailpol = Match.user(g, scope=SCOPE.AUTH, action=EMAILACTION.EMAILAUTO, user_object=user_object).policies()
autosms = len(autoemailpol) >= 1
return autosms
@log_with(log)
def _compose_email(self, message="<otp>", subject="Your OTP", mimetype="plain"):
"""
send email
:param message: the email submit message - could contain placeholders
like <otp> or <serial>
:type message: string
:param mimetype: the message MIME type - one of "plain", "html"
:type mimetype: basestring
:return: submitted message
:rtype: string
"""
ret = None
recipient = self._email_address
otp = self.get_otp()[2]
serial = self.get_serial()
message = message.replace("<otp>", otp)
message = message.replace("<serial>", serial)
tags = create_tag_dict(serial=serial,
tokenowner=self.user,
tokentype=self.get_tokentype(),
recipient={"givenname": self.user.info.get("givenname"),
"surname": self.user.info.get("surname")},
escape_html=mimetype.lower() == "html")
message = message.format(otp=otp, **tags)
subject = subject.replace("<otp>", otp)
subject = subject.replace("<serial>", serial)
subject = subject.format(otp=otp, **tags)
log.debug("sending Email to {0!r}".format(recipient))
identifier = get_from_config("email.identifier")
if identifier:
# New way to send email
ret = send_email_identifier(identifier, recipient, subject, message,
mimetype=mimetype)
else:
# old way to send email / DEPRECATED
mailserver = get_from_config("email.mailserver", "localhost")
port = int(get_from_config("email.port", 25))
username = get_from_config("email.username")
password = get_from_config("email.password")
mail_from = get_from_config("email.mailfrom", "privacyidea@localhost")
email_tls = get_from_config("email.tls", default=False,
return_bool=True)
ret = send_email_data(mailserver, subject, message, mail_from,
recipient, username, password, port,
email_tls)
return ret, message
@classmethod
def test_config(cls, params=None):
mailserver = getParam(params, "email.mailserver", optional=False)
subject = "Your TEST OTP"
message = "This is a test."
mail_from = getParam(params, "email.mailfrom", optional=False)
recipient = getParam(params, "email.recipient", optional=False)
password = getParam(params, "email.password")
username = getParam(params, "email.username")
port = getParam(params, "email.port", default=25)
email_tls = getParam(params, "email.tls", default=False)
r = send_email_data(mailserver, subject, message, mail_from,
recipient, username=username,
password=password, port=port, email_tls=email_tls)
description = "Could not send email."
if r:
description = TEST_SUCCESSFUL
return r, description