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########################################################################################
# #
# Author: Bertrand Neron, #
# Organization:'Biological Software and Databases' Group, Institut Pasteur, Paris. #
# Distributed under GPLv2 Licence. Please refer to the COPYING.LIB document. #
# #
########################################################################################
import os
from hashlib import md5
from time import time , sleep
import random
import shutil
from Mobyle.Session import Session
from Mobyle.Transaction import Transaction
from Mobyle.MobyleError import MobyleError , SessionError , AuthenticationError
from Local.Policy import authenticate as policy_authenticate
from logging import getLogger
class AuthenticatedSession( Session ):
VALID = 1
REJECT = 0
CONTINUE = 2
DIRNAME = 'authentified'
def __init__( self , cfg , userEmail , passwd=None, ticket_id=None):
self.log = getLogger('Mobyle.Session.AuthenticatedSession')
self.cfg = cfg
assert not(passwd and ticket_id), "please provide either a ticket id or a password" # TODO: clean up the parameters check
"""the maximum size of a session ( in bytes )"""
self.sessionLimit = self.cfg.sessionlimit()
self.__userEmail = userEmail
authenticatedSessionAllowed = self.cfg.authenticatedSession()
if authenticatedSessionAllowed == "no" :
self.log.error("can't create session AUTHENTICATED_SESSION is set to \"no\" in Local/Config/Config.py")
raise SessionError , "can't create authenticated session: permission denied"
key = self.__newSessionKey()
sessionDir = os.path.normpath( os.path.join( self.cfg.user_sessions_path() , AuthenticatedSession.DIRNAME , key ) )
self.key = key
""" the user/session key"""
self.Dir = sessionDir
""" the path to this session directory """
if os.path.exists( sessionDir ): #the session already exist
if passwd:
if not self.checkPasswd( passwd ):
self.log.info( "authentified/%s : Authentication Failure "% ( self.getKey() ) )
raise AuthenticationError , "Authentication Failure"
else:
self._getTicket()
elif ticket_id and not self.checkTicket( ticket_id ):
raise AuthenticationError , "Invalid ticket or expired ticket"
else:
self.__generateTicketId(ticket_id or None)
else: #creation of new Session
resp = self.__userEmail.check()
if not resp.status:
msg = " %s %s FORBIDDEN can't create authenticated session : %s" % ( self.__userEmail ,
os.environ[ 'REMOTE_ADDR' ] ,
resp.message
)
self.log.error( msg )
raise SessionError , "you are not allowed to register on this server for now"
try:
os.makedirs( sessionDir , 0755 ) #create parent directory
except Exception, err:
self.log.critical( "unable to create authenticated session : %s : %s" % ( sessionDir , err) , exc_info = True)
raise SessionError , "unable to create authenticated session"
mymd5 = md5()
mymd5.update( passwd )
cryptPasswd = mymd5.hexdigest()
authenticatedSessionAllowed = self.cfg.authenticatedSession()
if authenticatedSessionAllowed == "yes":
Transaction.create( os.path.join( sessionDir , self.FILENAME ) ,
True , #authenticated
True , #activated
userEmail = str( self.__userEmail ) ,
passwd = cryptPasswd )
self.__generateTicketId()
elif authenticatedSessionAllowed == "email" :
activatingKey = self.__newActivatingKey()
try:
from Mobyle.Net import Email
mail = Email( self.__userEmail )
mail.send( 'CONFIRM_SESSION' , { 'SENDER' : self.cfg.sender() ,
'HELP' : self.cfg.mailHelp() ,
'SERVER_NAME' : self.cfg.portal_url() ,
'ACTIVATING_KEY' : activatingKey ,
'CGI_URL' : self.cfg.cgi_url() }
)
Transaction.create( os.path.join( sessionDir , self.FILENAME ) ,
True , #authenticated
False , #activated
activatingKey = activatingKey ,
userEmail = self.__userEmail ,
passwd = cryptPasswd )
self.__generateTicketId()
# api create( id , authenticated , activated , activatingKey = None , userEmail = None, passwd = None)
except MobyleError , err :
msg = "can't send an activation email, session creation aborted"
self.log.error( "%s : %s " % ( msg , err ) )
os.rmdir( self.Dir )
raise SessionError , msg
self.url = "%s/%s/%s" % (self.cfg.user_sessions_url(), AuthenticatedSession.DIRNAME, self.key)
def __generateTicketId( self , ticket_id=None):
"""
create the ticket_id field in session file
"""
self.ticket_id = ticket_id or str(random.randint(0, 1000000))
transaction = self._getTransaction( Transaction.WRITE )
transaction.setTicket( self.ticket_id, time() + 3600 )
transaction.commit()
def isAuthenticated( self ):
return True
def setPasswd( self , passwd ):
"""
set the pass word for this session
@param passwd: the pass word to this session
@type passwd: string
"""
newMd5 = md5()
newMd5.update( passwd )
cryptPasswd = newMd5.hexdigest()
transaction = self._getTransaction( Transaction.WRITE )
transaction.setPasswd( cryptPasswd )
transaction.commit()
def checkPasswd( self , passwd ):
"""
check if passwd is the pass word of this session
@param passwd: the session pass word
@type passwd: string
"""
if passwd == "":
return False
try:
auth = policy_authenticate( self.__userEmail , passwd )
except AttributeError:
auth = self.CONTINUE
if auth == self.VALID :
return True
elif auth == self.REJECT:
return False
else:
transaction = self._getTransaction( Transaction.READ )
realPasswd = transaction.getPasswd()
transaction.commit()
newMd5 = md5()
newMd5.update( passwd )
passwd = newMd5.hexdigest()
if passwd == realPasswd :
return True
else:
return False
def _getTicket( self ):
"""
get the ticket
@param ticket_id: the ticket_id
@type ticket_id: string
"""
transaction = self._getTransaction( Transaction.READ )
r_ticket_id, r_exp_date = transaction.getTicket()
transaction.commit()
if r_ticket_id is None or time() < float(r_exp_date):
self.__generateTicketId(r_ticket_id)
else:
self.__generateTicketId()
return self.ticket_id
def checkTicket( self , ticket_id ):
"""
check if the ticket is valid
@param ticket_id: the ticket_id
@type ticket_id: string
"""
transaction = self._getTransaction( Transaction.READ )
r_ticket_id, r_exp_date = transaction.getTicket()
transaction.commit()
if r_ticket_id == ticket_id and time() < float(r_exp_date):
transaction = self._getTransaction( Transaction.WRITE )
transaction.setTicket( ticket_id, time() + 3600 )
transaction.commit()
return True
else:
return False
def changePasswd( self , oldPasswd , newPasswd ):
"""
change the password for this session
@param oldPasswd: the current passwd
@type oldPasswd: string
@param newPasswd: the new passwd
@type newPasswd: string
@raise AuthenticationError: if oldPasswd
"""
newMd5 = md5()
newMd5.update( oldPasswd )
oldCryptPasswd = newMd5.hexdigest()
newMd5 = md5()
newMd5.update( newPasswd )
newCryptPasswd = newMd5.hexdigest()
transaction = self._getTransaction( Transaction.WRITE)
currentPasswd = transaction.getPasswd()
if oldCryptPasswd == currentPasswd:
transaction.setPasswd( newCryptPasswd )
transaction.commit()
else:
transaction.rollback()
raise AuthenticationError , "Authentication failure"
def confirmEmail( self , userKey ):
"""
if the activatingkey match the session activatingkey the session is activated
@param userKey: the activation key send by email to the user
@type userKey: string
"""
transaction = self._getTransaction( Transaction.READ )
activatingKey = transaction.getActivatingKey()
transaction.commit()
if userKey == activatingKey:
transaction = self._getTransaction( Transaction.WRITE )
transaction.activate()
transaction.commit()
self.log.debug("%f : %s : confirmEmail succeed : %s" % ( time(), self.getKey() , activatingKey ) )
else:
self.log.info("authentified/%s : wrong key : %s" % ( self.getKey() , activatingKey ) )
raise AuthenticationError , "wrong key : %s" % activatingKey
def __newSessionKey( self ):
"""
@return: a unique id for the session
@rtype: string
"""
newMd5 = md5()
newMd5.update( str( self.__userEmail ) )
return newMd5.hexdigest()
def __newActivatingKey(self):
"""
@return: a new Session uniq activating key
@rtype: string
"""
t1 = time()
sleep( random.random() )
t2 = time()
base = md5( str(t1 +t2) )
sid = base.hexdigest()
return sid
def mergeWith( self , anonymousSession ):
"""
merge an anonymous session to this authenticated session
@param anonymousSession: the session to add this session
@type anonymousSession: L{AnonymousSession} object
"""
from BMPSWorkflow import BMPSWorkflow, CopyError
if anonymousSession == self:
self.log.error( "authentified/%s try to merge with myself" % self.getKey() )
raise SessionError , "try to merge with myself"
try:
for data in anonymousSession.getAllData():
self.addData( data['dataName'] ,
data['Type'] ,
producer = anonymousSession ,
inputModes = data['inputModes'] ,
usedBy = data['usedBy'] ,
producedBy = data['producedBy']
)
for job in anonymousSession.getAllJobs():
self.addJob( job[ 'jobID' ] ,
userName = job[ 'userName' ] ,
dataUsed = job[ 'dataUsed' ] ,
dataProduced = job[ 'dataProduced' ]
)
wf_names = anonymousSession.getBMPSWorkflows().keys()
for wf_name in wf_names:
wf = BMPSWorkflow( wf_name , anonymousSession )
try:
wf.copy_wf( self )
except CopyError, err:
self.log.debug("%f : %s :cannot copy Workflow named %s from session %s into session %s" % (time(),
self.getKey(),
wf_name,
anonymousSession.getDir(),
self.getDir() ) ,
exc_info = True)
self.log.error( "cannot copy Workflow named %s from session %s into session %s" % (wf_name, anonymousSession.getDir(), self.getDir() ) , exc_info = True)
raise err
except Exception, err :
self.log.error( "authentified/%s : error during mergeWith : %s" % ( self.getKey() , err ))
self.log.debug("%f : %s : error during mergeWith :" % ( time(), self.getKey() ) , exc_info = True )
raise err
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