1 files changed, 129 insertions, 0 deletions
diff --git a/whitelist.py b/whitelist.py
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index 0000000..7eb88cd
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+++ b/whitelist.py
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+"""News to mail gateway script. Copyright 2000 Cosimo Alfarano
+
+Author: Cosimo Alfarano
+Date: June 11 2000
+
+whitelist.py - Copyright 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.
+"""
+
+import sys
+import string
+import time
+import fcntl
+
+import pyginfo
+import wlp
+
+
+class whitelist:
+	"""whitelist handling class
+
+	Do you really want anyone can post? Ah ah ah.
+	"""
+
+	wl = {}
+	debug = None
+	log = None	# filedescriptor
+
+	# constants
+	DENY = 0
+	ACCEPT = 1 
+
+	def __init__(self, wlfile='wl.pyg', logfile='pyg.log', debug=0):
+
+		self.debug = debug
+
+		try:
+			wlp.setfilebyname(wlfile)
+		except (Exception), (errno,message):
+			print 'Opening %s: %s (errno %d)' % (wlfile,message,errno)
+			sys.exit(0)
+
+		# dict is a { ownername : {variable: value}} dictionary of dictionaries
+		self.wl = wlp.mkdict()
+
+#		print 'owner: option = value'
+#		for owner in self.wl.keys():
+#			for option in self.wl[owner].keys():
+#				print '%s: %s = %s' % (owner,option,self.wl[owner][option])	
+
+		try:
+			self.log = open(logfile, 'a')
+			self.lock()
+		except (Exception), message:
+			print '%s\nAre you authorized to use this program? ' % message
+			sys.exit(1)
+		
+	def lock(self):
+		fcntl.flock(self.log.fileno(),fcntl.LOCK_EX)
+
+	# to unlock fd locked, usually fd are unlocked after process exit()
+	def unlock(self):
+		fcntl.flock(self.log.fileno(),fcntl.LOCK_UN)
+	
+	def checkfrom(self, fromhead):
+		"""have you permission to be here, sir?"""
+
+		for owner in self.wl.keys():
+#			if(self.wl[owner]['From:'] == fromhead[:-1]): # remove '\n'
+			if(string.find(fromhead[:-1],self.wl[owner]['From:']) >= 0):
+				return owner
+		else:
+			return None
+
+
+	def log(self, string):
+		"""Captain Diary, Astral Date 962555394 from epoch.
+		it rawly write a line in logfile. Remeber to indent it, if you
+		like.
+		"""
+
+		self.log.write(string + '\n')
+
+	def logmsg(self, heads, ok=DENY,owner=None):
+		"""who are walking through my gate?
+		log
+		"""
+
+		ltime = time.ctime(time.time())
+
+		if time.daylight:
+			tzone = time.tzname[1]
+		else:
+			tzone = time.tzname[0]
+	
+		if(ok == self.ACCEPT):
+			self.log.write('Permission Accorded ')
+		else:
+			self.log.write('Permission Denied ')
+
+		self.log.write('at %s (%s)\n' % (ltime,tzone))
+		if(owner != None):
+			self.log.write('\tWLOwner: ' + owner + '\n')
+		self.log.write('\tFrom: ' + heads.get('From:','NOT PRESENT\n'))
+		self.log.write('\tSubject: ' + heads.get('Subject:','NOT PRESENT\n'))
+		self.log.write('\tSender: ' + heads.get('Sender:','NOT PRESENT\n'))
+		self.log.write('\tDate: ' + heads.get('Date:','NOT PRESENT\n'))
+
+		# some client create Message-Id other Message-ID.
+		if(heads.has_key('Message-ID:')):
+			self.log.write('\tMessage-ID: ' + heads.get('Message-ID:'))
+		else:
+			self.log.write('\tMessage-Id: ' + heads.get('Message-Id:','NOT PRESENT\n'))
+	
+		# X-Newsgroups: and To: are present if user is trusted, else
+		# Newsgroup: exists since no changes on nntp headers are done.
+		if(heads.has_key('X-Newsgroups:')):
+			self.log.write('\tTo: ' + heads.get('To:','NOT PRESENT\n'))
+			self.log.write('\tX-Newsgroups: ' + heads.get('X-Newsgroups:','NOT PRESENT\n'))
+		else:
+			self.log.write('\tNewsgroups: ' + heads.get('Newsgroups:','NOT PRESENT\n'))
+
+		
+		self.log.write('\n')