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# Copyright (C) 1998 by the Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""Handle passwords and sanitize approved messages."""
import os
import string
import time
import types
import Crypt
import Errors
import Utils
import mm_cfg
# TBD: is this the best location for the site password?
SITE_PW_FILE = os.path.join(mm_cfg.DATA_DIR, 'adm.pw')
class SecurityManager:
def SetSiteAdminPassword(self, pw):
old = os.umask(0022)
f = open(SITE_PW_FILE, "w+")
f.write(Crypt.crypt(pw, Utils.GetRandomSeed()))
f.close()
os.umask(old)
def CheckSiteAdminPassword(self, str):
try:
f = open(SITE_PW_FILE, "r")
pw = f.read()
f.close()
return Crypt.crypt(str, pw) == pw
# There probably is no site admin password if there was an exception
except:
return 0
def InitVars(self, crypted_password):
# Configurable, however, we don't pass this back in GetConfigInfo
# because it's a special case as it requires confirmation to change.
self.password = crypted_password
# Non configurable
self.passwords = {}
def ValidAdminPassword(self, pw):
if self.CheckSiteAdminPassword(pw):
return 1
return ((type(pw) == types.StringType) and
(Crypt.crypt(pw, self.password) == self.password))
def ConfirmAdminPassword(self, pw):
if(not self.ValidAdminPassword(pw)):
raise Errors.MMBadPasswordError
return 1
def MakeCookie(self):
client_ip = os.environ.get('REMOTE_ADDR') or '0.0.0.0'
issued = int(time.time())
expires = issued + mm_cfg.ADMIN_COOKIE_LIFE
secret = self.password
mac = hash(secret + client_ip + `issued` + `expires`)
return [client_ip, issued, expires, mac]
def CheckCookie(self, cookie):
if type(cookie) <> type([]):
return 0
if len(cookie) <> 4:
return 0
client_ip = os.environ.get('REMOTE_ADDR') or '0.0.0.0'
[for_ip, issued, expires, received_mac] = cookie
if for_ip <> client_ip:
return 0
now = time.time()
if not issued < now < expires:
return 0
secret = self.password
mac = hash(secret + client_ip + `issued` + `expires`)
if mac <> received_mac:
return 0
return 1
def ConfirmUserPassword(self, user, pw):
"""True if password is valid for site, list admin, or specific user."""
if self.ValidAdminPassword(pw):
return 1
addr = self.FindUser(user)
if addr is None:
raise Errors.MMNotAMemberError
storedpw = self.passwords.get(addr)
if storedpw is None:
raise Errors.MMBadUserError
if storedpw <> pw:
raise Errors.MMBadPasswordError
return 1
def ChangeUserPassword(self, user, newpw, confirm):
self.IsListInitialized()
addr = self.FindUser(user)
if not addr:
raise Errors.MMNotAMemberError
if newpw <> confirm:
raise Errors.MMPasswordsMustMatch
self.passwords[addr] = newpw
self.Save()
def ExtractApproval(self, msg):
"""True if message has valid administrator approval.
Approval line is always stripped from message as a side effect."""
p = msg.getheader('approved')
if p == None:
return 0
del msg['approved'] # Mustn't deliver this line!!
return self.ValidAdminPassword(p)
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