1 files changed, 99 insertions, 0 deletions
diff --git a/src/whitelist.py b/src/whitelist.py
new file mode 100644
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+++ b/src/whitelist.py
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+"""News to mail gateway script. Copyright 2000 Cosimo Alfarano
+
+Author: Cosimo Alfarano
+Date: June 11 2000
+
+whitelist.py - (C) 2000 by Cosimo Alfarano <Alfarano@Students.CS.UniBo.It>
+You can use this software under the terms of the GPL. If we meet some day,
+and you think this stuff is worth it, you can buy me a beer in return.
+
+Thanks to md for this useful formula. Beer is beer.
+
+whitelist manage a list of trusted user.
+"""
+
+from __future__ import absolute_import
+import logging
+# logging.basicConfig(level=logging.DEBUG)
+import sys
+import time
+
+import wlp
+
+
+class whitelist(object):
+    """whitelist handling class
+
+    Do you really want anyone can post? Ah ah ah.
+    """
+    wl = {}
+
+    # constants
+    DENY = 0
+    ACCEPT = 1
+
+    def __init__(self, wlfile, logfile='pyg.log'):
+        self.logger = logging.getLogger(__name__)
+        self.logger.setLevel(logging.INFO)
+        log_fh = logging.FileHandler(logfile)
+        log_fmt = logging.Formatter(
+            '%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+        log_fh.setFormatter(log_fmt)
+        self.logger.addHandler(log_fh)
+
+        # dict is a { ownername : {variable: value}} dictionary of dictionaries
+        with open(wlfile) as inf:
+            self.wl = wlp.mkdict(inf)
+
+    def checkfrom(self, fromhead):
+        """have you permission to be here, sir?"""
+        for owner in self.wl:
+            # here colon after 'From' IS required, because binary module wl
+            # expects it.
+            # TODO: when switching to the python lexxing, remove this
+            # limitation.
+            if fromhead.find(self.wl[owner]['From:']) >= 0:
+                return owner
+            else:
+                return None
+
+    def logmsg(self, heads, ok=DENY, owner=None):
+        """who are walking through my gate?
+        """
+
+        ltime = time.ctime(time.time())
+
+        if time.daylight:
+            tzone = time.tzname[1]
+        else:
+            tzone = time.tzname[0]
+
+        if ok == self.ACCEPT:
+            self.logger.info('Permission Accorded ')
+        else:
+            self.logger.info('Permission Denied ')
+
+        self.logger.info('at %s (%s)', ltime, tzone)
+        if owner is not None:
+            self.logger.debug('\tWLOwner: ' + owner + '')
+        self.logger.debug('\tFrom: ' + heads.get('From', 'NOT PRESENT'))
+        self.logger.debug('\tSubject: ' + heads.get('Subject', 'NOT PRESENT'))
+        self.logger.debug('\tSender: ' + heads.get('Sender', 'NOT PRESENT'))
+        self.logger.debug('\tDate: ' + heads.get('Date', 'NOT PRESENT'))
+
+        # some client create Message-Id other Message-ID.
+        if 'Message-ID' in heads:
+            self.logger.debug('\tMessage-ID: ' + heads.get('Message-ID'))
+        else:
+            self.logger.debug('\tMessage-Id: ' + heads.get('Message-Id',
+                                                           'NOT PRESENT'))
+
+        # X-Newsgroups: and To: are present if user is trusted, else
+        # Newsgroup: exists since no changes on nntp headers are done.
+        if 'X-Newsgroups' in heads:
+            self.logger.debug('\tTo: ' + heads.get('To', 'NOT PRESENT'))
+            self.logger.debug('\tX-Newsgroups: ' + heads.get('X-Newsgroups',
+                                                             'NOT PRESENT'))
+        else:
+            self.logger.debug('\tNewsgroups: ' +
+                              heads.get('Newsgroups', 'NOT PRESENT'))