Make PL/pgSQL function feed back identity for mailboxes/relocated when there
are catchall destinations.
Without catchall aliases, if no virtual_alias matches, the query can just
return NULL and Postfix will later check mailboxes/relocated for the address
to rewrite.
However, since virtual aliases are handled long before mailboxes/relocated,
a catchall alias would also catch mail to mailboxes and relocated addresses,
which we do not want.
The way to tell postfix to keep delivering is for the virtual alias map to
return the search key itself (identity function).
This patch changes the postfix_virtual_alias_maps Pl/pgSQL function to do
exactly that, but only if there are catchall destinations defined for the
domain in question — otherwise it returns NULL when no match is found.
# -*- coding: UTF-8 -*-
# Copyright (c) 2010 - 2011, Pascal Volk
# See COPYING for distribution information.
"""
VirtualMailManager.pycompat.hashlib
VirtualMailManager's minimal hashlib emulation for Python 2.4
hashlib.md5(...), hashlib.sha1(...), hashlib.new('md5', ...) and
hashlib.new('sha1', ...) will work always.
When the PyCrypto module <http://www.pycrypto.org/> could be found in
sys.path hashlib.new('md4', ...) will also work.
With PyCrypto >= 2.1.0alpha1 hashlib.new('sha256', ...) and
hashlib.sha256(...) becomes functional.
"""
import md5 as _md5
import sha as _sha1
try:
import Crypto
except ImportError:
_md4 = None
SHA256 = None
else:
from Crypto.Hash import MD4 as _md4
if hasattr(Crypto, 'version_info'): # <- Available since v2.1.0alpha1
from Crypto.Hash import SHA256 # SHA256 works since v2.1.0alpha1
sha256 = SHA256.new
else:
SHA256 = None
del Crypto
compat = 0x01
md5 = _md5.new
sha1 = _sha1.new
def new(name, string=''):
"""Return a new hashing object using the named algorithm, optionally
initialized with the provided string.
"""
if name in ('md5', 'MD5'):
return _md5.new(string)
if name in ('sha1', 'SHA1'):
return _sha1.new(string)
if not _md4:
raise ValueError('unsupported hash type')
if name in ('md4', 'MD4'):
return _md4.new(string)
if name in ('sha256', 'SHA256') and SHA256:
return SHA256.new(string)
raise ValueError('unsupported hash type')