273 lines
9.8 KiB
Python
273 lines
9.8 KiB
Python
# imaplib utilities
|
|
# Copyright (C) 2002-2007 John Goerzen <jgoerzen@complete.org>
|
|
# 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>
|
|
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
import re, socket, time, subprocess
|
|
from offlineimap.ui import UIBase
|
|
from imaplib import *
|
|
|
|
# Import the symbols we need that aren't exported by default
|
|
from imaplib import IMAP4_PORT, IMAP4_SSL_PORT, InternalDate, Mon2num
|
|
|
|
try:
|
|
import ssl
|
|
except ImportError:
|
|
#fails on python <2.6
|
|
pass
|
|
|
|
class IMAP4_Tunnel(IMAP4):
|
|
"""IMAP4 client class over a tunnel
|
|
|
|
Instantiate with: IMAP4_Tunnel(tunnelcmd)
|
|
|
|
tunnelcmd -- shell command to generate the tunnel.
|
|
The result will be in PREAUTH stage."""
|
|
|
|
def __init__(self, tunnelcmd):
|
|
IMAP4.__init__(self, tunnelcmd)
|
|
|
|
def open(self, host, port):
|
|
"""The tunnelcmd comes in on host!"""
|
|
self.process = subprocess.Popen(host, shell=True, close_fds=True,
|
|
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
|
|
(self.outfd, self.infd) = (self.process.stdin, self.process.stdout)
|
|
|
|
def read(self, size):
|
|
retval = ''
|
|
while len(retval) < size:
|
|
retval += self.infd.read(size - len(retval))
|
|
return retval
|
|
|
|
def readline(self):
|
|
return self.infd.readline()
|
|
|
|
def send(self, data):
|
|
self.outfd.write(data)
|
|
|
|
def shutdown(self):
|
|
self.infd.close()
|
|
self.outfd.close()
|
|
self.process.wait()
|
|
|
|
|
|
def new_mesg(self, s, secs=None):
|
|
if secs is None:
|
|
secs = time.time()
|
|
tm = time.strftime('%M:%S', time.localtime(secs))
|
|
UIBase.getglobalui().debug('imap', ' %s.%02d %s' % (tm, (secs*100)%100, s))
|
|
|
|
class WrappedIMAP4_SSL(IMAP4_SSL):
|
|
"""Provides an improved version of the standard IMAP4_SSL
|
|
|
|
It provides a better readline() implementation as impaplib's
|
|
readline() is extremly inefficient. It can also connect to IPv6
|
|
addresses."""
|
|
def __init__(self, *args, **kwargs):
|
|
self._readbuf = ''
|
|
self._cacertfile = kwargs.get('cacertfile', None)
|
|
if kwargs.has_key('cacertfile'):
|
|
del kwargs['cacertfile']
|
|
IMAP4_SSL.__init__(self, *args, **kwargs)
|
|
|
|
def open(self, host = '', port = IMAP4_SSL_PORT):
|
|
"""Do whatever IMAP4_SSL would do in open, but call sslwrap
|
|
with cert verification"""
|
|
#IMAP4_SSL.open(self, host, port) uses the below 2 lines:
|
|
self.host = host
|
|
self.port = port
|
|
|
|
#rather than just self.sock = socket.create_connection((host, port))
|
|
#we use the below part to be able to connect to ipv6 addresses too
|
|
#This connects to the first ip found ipv4/ipv6
|
|
#Added by Adriaan Peeters <apeeters@lashout.net> based on a socket
|
|
#example from the python documentation:
|
|
#http://www.python.org/doc/lib/socket-example.html
|
|
res = socket.getaddrinfo(host, port, socket.AF_UNSPEC,
|
|
socket.SOCK_STREAM)
|
|
# Try all the addresses in turn until we connect()
|
|
last_error = 0
|
|
for remote in res:
|
|
af, socktype, proto, canonname, sa = remote
|
|
self.sock = socket.socket(af, socktype, proto)
|
|
last_error = self.sock.connect_ex(sa)
|
|
if last_error == 0:
|
|
break
|
|
else:
|
|
self.sock.close()
|
|
if last_error != 0:
|
|
# FIXME
|
|
raise socket.error(last_error)
|
|
|
|
#connected to socket, now wrap it in SSL
|
|
try:
|
|
if self._cacertfile:
|
|
requirecert = ssl.CERT_REQUIRED
|
|
else:
|
|
requirecert = ssl.CERT_NONE
|
|
|
|
self.sslobj = ssl.wrap_socket(self.sock, self.keyfile,
|
|
self.certfile,
|
|
ca_certs = self._cacertfile,
|
|
cert_reqs = requirecert)
|
|
except NameError:
|
|
#Python 2.4/2.5 don't have the ssl module, we need to
|
|
#socket.ssl() here but that doesn't allow cert
|
|
#verification!!!
|
|
if self._cacertfile:
|
|
#user configured a CA certificate, but python 2.4/5 doesn't
|
|
#allow us to easily check it. So bail out here.
|
|
raise Exception("SSL CA Certificates cannot be checked with python <=2.6. Abort")
|
|
self.sslobj = socket.ssl(self.sock, self.keyfile,
|
|
self.certfile)
|
|
|
|
else:
|
|
#ssl.wrap_socket worked and cert is verified, now check
|
|
#that hostnames also match.
|
|
error = self._verifycert(self.sslobj.getpeercert(), host)
|
|
if error:
|
|
raise ssl.SSLError("SSL Certificate host name mismatch: %s" % error)
|
|
|
|
#TODO: Done for now. We should implement a mutt-like behavior
|
|
#that offers the users to accept a certificate (presenting a
|
|
#fingerprint of it) (get via self.sslobj.getpeercert()), and
|
|
#save that, and compare on future connects, rather than having
|
|
#to trust what the CA certs say.
|
|
|
|
def _verifycert(self, cert, hostname):
|
|
'''Verify that cert (in socket.getpeercert() format) matches hostname.
|
|
CRLs and subjectAltName are not handled.
|
|
|
|
Returns error message if any problems are found and None on success.
|
|
'''
|
|
if not cert:
|
|
return ('no certificate received')
|
|
dnsname = hostname.lower()
|
|
for s in cert.get('subject', []):
|
|
key, value = s[0]
|
|
if key == 'commonName':
|
|
certname = value.lower()
|
|
if (certname == dnsname or
|
|
'.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1]):
|
|
return None
|
|
return ('certificate is for %s') % certname
|
|
return ('no commonName found in certificate')
|
|
|
|
def _read_upto (self, n):
|
|
"""Read up to n bytes, emptying existing _readbuffer first"""
|
|
bytesfrombuf = min(n, len(self._readbuf))
|
|
if bytesfrombuf:
|
|
# Return the stuff in readbuf, even if less than n.
|
|
# It might contain the rest of the line, and if we try to
|
|
# read more, might block waiting for data that is not
|
|
# coming to arrive.
|
|
retval = self._readbuf[:bytesfrombuf]
|
|
self._readbuf = self._readbuf[bytesfrombuf:]
|
|
return retval
|
|
return self.sslobj.read(min(n, 16384))
|
|
|
|
def read(self, n):
|
|
"""Read exactly n bytes
|
|
|
|
As done in IMAP4_SSL.read() API. If read returns less than n
|
|
bytes, things break left and right."""
|
|
chunks = []
|
|
read = 0
|
|
while read < n:
|
|
data = self._read_upto (n-read)
|
|
read += len(data)
|
|
chunks.append(data)
|
|
|
|
return ''.join(chunks)
|
|
|
|
def readline(self):
|
|
"""Get the next line. This implementation is more efficient
|
|
than IMAP4_SSL.readline() which reads one char at a time and
|
|
reassembles the string by appending those chars. Uggh."""
|
|
retval = ''
|
|
while 1:
|
|
linebuf = self._read_upto(1024)
|
|
nlindex = linebuf.find("\n")
|
|
if nlindex != -1:
|
|
retval += linebuf[:nlindex + 1]
|
|
self._readbuf = linebuf[nlindex + 1:] + self._readbuf
|
|
return retval
|
|
else:
|
|
retval += linebuf
|
|
|
|
|
|
class WrappedIMAP4(IMAP4):
|
|
"""Improved version of imaplib.IMAP4 that can also connect to IPv6"""
|
|
|
|
def open(self, host = '', port = IMAP4_PORT):
|
|
"""Setup connection to remote server on "host:port"
|
|
(default: localhost:standard IMAP4 port).
|
|
"""
|
|
#self.host and self.port are needed by the parent IMAP4 class
|
|
self.host = host
|
|
self.port = port
|
|
res = socket.getaddrinfo(host, port, socket.AF_UNSPEC,
|
|
socket.SOCK_STREAM)
|
|
|
|
# Try each address returned by getaddrinfo in turn until we
|
|
# manage to connect to one.
|
|
# Try all the addresses in turn until we connect()
|
|
last_error = 0
|
|
for remote in res:
|
|
af, socktype, proto, canonname, sa = remote
|
|
self.sock = socket.socket(af, socktype, proto)
|
|
last_error = self.sock.connect_ex(sa)
|
|
if last_error == 0:
|
|
break
|
|
else:
|
|
self.sock.close()
|
|
if last_error != 0:
|
|
# FIXME
|
|
raise socket.error(last_error)
|
|
self.file = self.sock.makefile('rb')
|
|
|
|
mustquote = re.compile(r"[^\w!#$%&'+,.:;<=>?^`|~-]")
|
|
|
|
def Internaldate2epoch(resp):
|
|
"""Convert IMAP4 INTERNALDATE to UT.
|
|
|
|
Returns seconds since the epoch.
|
|
"""
|
|
|
|
mo = InternalDate.match(resp)
|
|
if not mo:
|
|
return None
|
|
|
|
mon = Mon2num[mo.group('mon')]
|
|
zonen = mo.group('zonen')
|
|
|
|
day = int(mo.group('day'))
|
|
year = int(mo.group('year'))
|
|
hour = int(mo.group('hour'))
|
|
min = int(mo.group('min'))
|
|
sec = int(mo.group('sec'))
|
|
zoneh = int(mo.group('zoneh'))
|
|
zonem = int(mo.group('zonem'))
|
|
|
|
# INTERNALDATE timezone must be subtracted to get UT
|
|
|
|
zone = (zoneh*60 + zonem)*60
|
|
if zonen == '-':
|
|
zone = -zone
|
|
|
|
tt = (year, mon, day, hour, min, sec, -1, -1, -1)
|
|
|
|
return time.mktime(tt)
|