#!/usr/bin/python
'''
Export the username / password db from a given mailman list
into Apache's 'AuthDigestFile' format
'''

import pickle
try:
    from hashlib import md5
except ImportError:
    from md5 import md5


### Begin Variables ###

# Realm name for apache auth (used in digest hash generation)
realm = 'foomp'

# path to dir containing all lists
mm_lists_path = "/var/lib/mailman/lists"

# the list whose membership will be synced
mm_target_list = "blaag"

# path to target lists's config pickle
mm_target_config = mm_lists_path + "/" + mm_target_list + "/config.pck"

# path to export file, in Apache AuthUserFile format
authdigestfilepath = "/etc/mailman/AuthDigestFile"

### End Variables ###


# open the target list's config pickle
f = open(mm_target_config,"r")

# read the pickle into a dict
p = pickle.load(f)
f.close()

# extract usernames / passwords from the dict
creds = p["passwords"]

# new string to buffer output
out = ''

# iterate all of the username / password pairs
for u,p in creds.iteritems():
    # Generate the string to enter into the htdigest file
    # cribbed from: http://trac.edgewall.org/wiki/TracStandalone
    kd = lambda x: md5(':'.join(x)).hexdigest()
    out += ':'.join((u, realm, kd([u, realm, p])))
    out += "\n"

# write out the AuthDigestFile
authfile = open (authdigestfilepath, "w")
authfile.write(out)
authfile.close()