4 # Prior copyright probably rmurray, troup, joey, jgg -- weasel 2008
5 # Copyright (c) 2009 Stephen Gran <steve@lobefin.net>
6 # Copyright (c) 2008 Peter Palfrader <peter@palfrader.org>
7 # Copyright (c) 2008 Joerg Jaspert <joerg@debian.org>
9 import userdir_gpg, userdir_ldap, sys, traceback, time, ldap, os, commands
12 from userdir_gpg import *
13 from userdir_ldap import *
14 from userdir_exceptions import *
16 # Error codes from /usr/include/sysexits.h
17 ReplyTo = ConfModule.replyto;
18 PingFrom = ConfModule.pingfrom;
19 ChPassFrom = ConfModule.chpassfrom;
20 ChangeFrom = ConfModule.changefrom;
21 ReplayCacheFile = ConfModule.replaycachefile;
22 SSHFingerprintFile = ConfModule.fingerprintfile
24 UUID_FORMAT = '[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}'
27 EX_PERMFAIL = 65; # EX_DATAERR
28 Error = 'Message Error';
38 SSHFingerprint = re.compile('^(\d+) ([0-9a-f\:]{47}) (.+)$')
39 SSHRSA1Match = re.compile('^^(.* )?\d+ \d+ \d+')
41 GenderTable = {"male": 1,
49 ArbChanges = {"c": "..",
51 "facsimileTelephoneNumber": ".*",
52 "telephoneNumber": ".*",
53 "postalAddress": ".*",
57 "emailForward": "^([^<>@]+@.+)?$",
58 "jabberJID": "^([^<>@]+@.+)?$",
63 "birthDate": "^([0-9]{4})([01][0-9])([0-3][0-9])$",
64 "mailDisableMessage": ".*",
65 "mailGreylisting": "^(TRUE|FALSE)$",
66 "mailCallout": "^(TRUE|FALSE)$",
67 "mailDefaultOptions": "^(TRUE|FALSE)$",
69 "gender": "^(1|2|9|male|female|unspecified)$",
70 "mailContentInspectionAction": "^(reject|blackhole|markup)$",
73 DelItems = {"c": None,
75 "facsimileTelephoneNumber": None,
76 "telephoneNumber": None,
77 "postalAddress": None,
90 "sshRSAAuthKey": None,
92 "mailGreylisting": None,
96 "mailWhitelist": None,
97 "mailDisableMessage": None,
98 "mailDefaultOptions": None,
100 "mailContentInspectionAction": None,
104 # Decode a GPS location from some common forms
105 def LocDecode(Str,Dir):
106 # Check for Decimal degrees, DGM, or DGMS
107 if re.match("^[+-]?[\d.]+$",Str) != None:
110 Deg = '0'; Min = None; Sec = None; Dr = Dir[0];
112 # Check for DDDxMM.MMMM where x = [nsew]
113 Match = re.match("^(\d+)(["+Dir+"])([\d.]+)$",Str);
116 Deg = G[0]; Min = G[2]; Dr = G[1];
119 Match = re.match("^([\d.]+) ?(["+Dir+"])$",Str);
122 Deg = G[0]; Dr = G[1];
124 # Check for DD:MM.MM x
125 Match = re.match("^(\d+):([\d.]+) ?(["+Dir+"])$",Str);
128 Deg = G[0]; Min = G[1]; Dr = G[2];
130 # Check for DD:MM:SS.SS x
131 Match = re.match("^(\d+):(\d+):([\d.]+) ?(["+Dir+"])$",Str);
134 Deg = G[0]; Min = G[1]; Sec = G[2]; Dr = G[3];
138 raise UDFormatError, "Bad degrees";
139 if Min != None and float(Min) > 60:
140 raise UDFormatError, "Bad minutes";
141 if Sec != None and float(Sec) > 60:
142 raise UDFormatError, "Bad seconds";
144 # Pad on an extra leading 0 to disambiguate small numbers
145 if len(Deg) <= 1 or Deg[1] == '.':
147 if Min != None and (len(Min) <= 1 or Min[1] == '.'):
149 if Sec != None and (len(Sec) <= 1 or Sec[1] == '.'):
152 # Construct a DGM/DGMS type value from the components.
163 # Handle changing a set of arbitary fields
165 def DoArbChange(Str,Attrs):
166 Match = re.match("^([^ :]+): (.*)$",Str);
171 attrName = G[0].lower();
172 for i in ArbChanges.keys():
173 if i.lower() == attrName:
176 if ArbChanges.has_key(attrName) == 0:
179 if re.match(ArbChanges[attrName],G[1]) == None:
180 raise UDFormatError, "Item does not match the required format"+ArbChanges[attrName];
183 if attrName == 'gender':
184 if G[1] not in GenderTable:
185 raise UDFormatError, "Gender not found in table"
186 value = GenderTable[G[1]]
188 # if attrName == 'birthDate':
189 # (re.match("^([0-9]{4})([01][0-9])([0-3][0-9])$",G[1]) {
190 # $bd_yr = $1; $bd_mo = $2; $bd_day = $3;
191 # if ($bd_mo > 0 and $bd_mo <= 12 and $bd_day > 0) {
193 # if ($bd_day == 29 and ($bd_yr == 0 or ($bd_yr % 4 == 0 && ($bd_yr % 100 != 0 || $bd_yr % 400 == 0)))) {
195 # } elsif ($bd_day <= 28) {
198 # } elsif ($bd_mo == 4 or $bd_mo == 6 or $bd_mo == 9 or $bd_mo == 11) {
199 # if ($bd_day <= 30) {
203 # if ($bd_day <= 31) {
208 # } elsif (not defined($query->param('birthdate')) or $query->param('birthdate') =~ /^\s*$/) {
211 Attrs.append((ldap.MOD_REPLACE,attrName,value));
212 return "Changed entry %s to %s"%(attrName,value);
214 # Handle changing a set of arbitary fields
216 def DoDel(Str,Attrs):
217 Match = re.match("^del (.*)$",Str);
222 attrName = G[0].lower();
223 for i in DelItems.keys():
224 if i.lower() == attrName:
227 if DelItems.has_key(attrName) == 0:
228 return "Cannot erase entry %s"%(attrName);
230 Attrs.append((ldap.MOD_DELETE,attrName,None));
231 return "Removed entry %s"%(attrName);
233 # Handle a position change message, the line format is:
234 # Lat: -12412.23 Long: +12341.2342
235 def DoPosition(Str,Attrs):
236 Match = re.match("^lat: ([+\-]?[\d:.ns]+(?: ?[ns])?) long: ([+\-]?[\d:.ew]+(?: ?[ew])?)$", Str.lower())
242 sLat = LocDecode(G[0],"ns");
243 sLong = LocDecode(G[1],"ew");
244 Lat = DecDegree(sLat,1);
245 Long = DecDegree(sLong,1);
247 raise UDFormatError, "Positions were found, but they are not correctly formed";
249 Attrs.append((ldap.MOD_REPLACE,"latitude",sLat));
250 Attrs.append((ldap.MOD_REPLACE,"longitude",sLong));
251 return "Position set to %s/%s (%s/%s decimal degrees)"%(sLat,sLong,Lat,Long);
253 # Load bad ssh fingerprints
255 f = open(SSHFingerprintFile, "r")
257 FingerprintLine = re.compile('^([0-9a-f\:]{47}).*$')
258 for line in f.readlines():
259 Match = FingerprintLine.match(line)
260 if Match is not None:
265 # Handle an SSH authentication key, the line format is:
266 # [options] 1024 35 13188913666680[..] [comment]
267 def DoSSH(Str, Attrs, badkeys, uid):
268 Match = SSH2AuthSplit.match(Str);
274 Match = SSHRSA1Match.match(Str)
275 if Match is not None:
276 return "RSA1 keys not supported anymore"
279 (fd, path) = tempfile.mkstemp(".pub", "sshkeytry", "/tmp")
281 f.write("%s\n" % (Str))
283 cmd = "/usr/bin/ssh-keygen -l -f %s < /dev/null" % (path)
284 (result, output) = commands.getstatusoutput(cmd)
287 raise UDExecuteError, "ssh-keygen -l invocation failed!\n%s\n" % (output)
291 Date = time.strftime("%a, %d %b %Y %H:%M:%S +0000",time.gmtime(time.time()))
292 ErrReplyHead = "From: %s\nCc: %s\nReply-To: %s\nDate: %s\n" % (os.environ['SENDER'],os.environ['SENDER'],ReplyTo,Date)
294 Subst["__ADMIN__"] = ReplyTo
295 Subst["__USER__"] = uid
297 Match = SSHFingerprint.match(output)
303 Subst["__ERROR__"] = "SSH keysize %s is below limit 1024" % (g[0])
304 ErrReply = TemplateSubst(Subst,open(TemplatesDir+"admin-info","r").read())
306 Child = os.popen("/usr/sbin/sendmail -t","w")
307 Child.write(ErrReplyHead)
308 Child.write(ErrReply)
309 if Child.close() != None:
310 raise UDExecuteError, "Sendmail gave a non-zero return code"
312 sys.exit(EX_TEMPFAIL)
314 # And now break and stop processing input, which sends a reply to the user.
315 raise UDFormatError, "SSH keys must have at least 1024 bits, processing halted, NOTHING MODIFIED AT ALL"
316 elif g[1] in badkeys:
319 Subst["__ERROR__"] = "SSH key with fingerprint %s known as bad key" % (g[1])
320 ErrReply = TemplateSubst(Subst,open(TemplatesDir+"admin-info","r").read())
322 Child = os.popen("/usr/sbin/sendmail -t","w")
323 Child.write(ErrReplyHead)
324 Child.write(ErrReply)
325 if Child.close() != None:
326 raise UDExecuteError, "Sendmail gave a non-zero return code"
328 sys.exit(EX_TEMPFAIL)
330 # And now break and stop processing input, which sends a reply to the user.
331 raise UDFormatError, "Submitted SSH Key known to be bad and insecure, processing halted, NOTHING MODIFIED AT ALL"
333 if (typekey == "dss"):
334 return "DSA keys not accepted anymore"
338 Attrs.append((ldap.MOD_ADD,"sshRSAAuthKey",Str));
339 return "SSH Key added "+FormatSSHAuth(Str);
341 Attrs.append((ldap.MOD_REPLACE,"sshRSAAuthKey",Str));
343 return "SSH Keys replaced with "+FormatSSHAuth(Str);
345 # Handle changing a dns entry
346 # host IN A 12.12.12.12
347 # host IN AAAA 1234::5678
348 # host IN CNAME foo.bar. <- Trailing dot is required
349 # host IN MX foo.bar. <- Trailing dot is required
350 def DoDNS(Str,Attrs,DnRecord):
351 cnamerecord = re.match("^[-\w]+\s+IN\s+CNAME\s+([-\w.]+\.)$",Str,re.IGNORECASE)
352 arecord = re.match('^[-\w]+\s+IN\s+A\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$',Str,re.IGNORECASE)
353 mxrecord = re.match("^[-\w]+\s+IN\s+MX\s+(\d{1,3})\s+([-\w.]+\.)$",Str,re.IGNORECASE)
354 #aaaarecord = re.match('^[-\w]+\s+IN\s+AAAA\s+((?:[0-9a-f]{1,4})(?::[0-9a-f]{1,4})*(?::(?:(?::[0-9a-f]{1,4})*|:))?)$',Str,re.IGNORECASE)
355 aaaarecord = re.match('^[-\w]+\s+IN\s+AAAA\s+([A-F0-9:]{2,39})$',Str,re.IGNORECASE)
357 if cnamerecord == None and\
359 mxrecord == None and\
363 # Check if the name is already taken
364 G = re.match('^([-\w+]+)\s',Str)
366 raise UDFormatError, "Hostname not found although we already passed record syntax checks"
367 hostname = G.group(1)
369 # Check for collisions
371 # [JT 20070409 - search for both tab and space suffixed hostnames
372 # since we accept either. It'd probably be better to parse the
373 # incoming string in order to construct what we feed LDAP rather
374 # than just passing it through as is.]
375 filter = "(|(dnsZoneEntry=%s *)(dnsZoneEntry=%s *))" % (hostname, hostname)
376 Rec = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,filter,["uid"]);
378 if GetAttr(x,"uid") != GetAttr(DnRecord,"uid"):
379 return "DNS entry is already owned by " + GetAttr(x,"uid")
385 if DNS.has_key(hostname):
386 return "CNAME and other RR types not allowed: "+Str
390 if DNS.has_key(hostname) and DNS[hostname] == 2:
391 return "CNAME and other RR types not allowed: "+Str
395 if cnamerecord != None:
396 sanitized = "%s IN CNAME %s" % (hostname, cnamerecord.group(1))
397 elif arecord != None:
398 ipaddress = arecord.group(1)
399 for quad in ipaddress.split('.'):
400 if not (int(quad) >=0 and int(quad) <= 255):
401 return "Invalid quad %s in IP address %s in line %s" %(quad, ipaddress, Str)
402 sanitized = "%s IN A %s"% (hostname, ipaddress)
403 elif mxrecord != None:
404 priority = mxrecord.group(1)
405 mx = mxrecord.group(2)
406 sanitized = "%s IN MX %s %s" % (hostname, priority, mx)
407 elif aaaarecord != None:
408 ipv6address = aaaarecord.group(1)
409 parts = ipv6address.split(':')
411 return "Invalid IPv6 address (%s): too many parts"%(ipv6address)
413 return "Invalid IPv6 address (%s): too few parts"%(ipv6address)
418 seenEmptypart = False
421 return "Invalid IPv6 address (%s): part %s is longer than 4 characters"%(ipv6address, p)
424 return "Invalid IPv6 address (%s): more than one :: (nothing in between colons) is not allowed"%(ipv6address)
426 sanitized = "%s IN AAAA %s" % (hostname, ipv6address)
428 raise UDFormatError, "None of the types I recognize was it. I shouldn't be here. confused."
431 Attrs.append((ldap.MOD_ADD,"dnsZoneEntry",sanitized));
432 return "DNS Entry added "+sanitized;
434 Attrs.append((ldap.MOD_REPLACE,"dnsZoneEntry",sanitized));
436 return "DNS Entry replaced with "+sanitized;
438 # Handle an RBL list (mailRBL, mailRHSBL, mailWhitelist)
439 def DoRBL(Str,Attrs):
440 Match = re.compile('^mail(rbl|rhsbl|whitelist) ([-a-z0-9.]+)$').match(Str.lower())
444 if Match.group(1) == "rbl":
446 if Match.group(1) == "rhsbl":
448 if Match.group(1) == "whitelist":
449 Key = "mailWhitelist"
450 Host = Match.group(2)
453 if SeenList.has_key(Key):
454 Attrs.append((ldap.MOD_ADD,Key,Host))
455 return "%s added %s" % (Key,Host)
457 Attrs.append((ldap.MOD_REPLACE,Key,Host))
459 return "%s replaced with %s" % (Key,Host)
461 # Handle a ConfirmSudoPassword request
462 def DoConfirmSudopassword(Str):
463 Match = re.compile('^confirm sudopassword ('+UUID_FORMAT+') ([a-z0-9.,*]+) ([0-9a-f]{40})$').match(Str)
467 uuid = Match.group(1)
468 hosts = Match.group(2)
469 hmac = Match.group(3)
472 SudoPasswd[uuid] = (hosts, hmac)
473 return "got confirm for sudo password %s on host(s) %s, auth code %s" % (uuid,hosts, hmac)
475 def FinishConfirmSudopassword(l, uid, Attrs):
479 res = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+uid, ['sudoPassword']);
481 raise UDFormatError, "Not exactly one hit when searching for user"
482 if res[0][1].has_key('sudoPassword'):
483 inldap = res[0][1]['sudoPassword']
489 Match = re.compile('^('+UUID_FORMAT+') (confirmed:[0-9a-f]{40}|unconfirmed) ([a-z0-9.,*]+) ([^ ]+)$').match(entry)
491 raise UDFormatError, "Could not parse existing sudopasswd entry"
492 uuid = Match.group(1)
493 status = Match.group(2)
494 hosts = Match.group(3)
495 cryptedpass = Match.group(4)
497 if SudoPasswd.has_key(uuid):
498 confirmedHosts = SudoPasswd[uuid][0]
499 confirmedHmac = SudoPasswd[uuid][1]
500 if status.startswith('confirmed:'):
501 if status == 'confirmed:'+make_passwd_hmac('password-is-confirmed', 'sudo', uid, uuid, hosts, cryptedpass):
502 result = result + "Entry %s for sudo password on hosts %s already confirmed.\n"%(uuid, hosts)
504 result = result + "Entry %s for sudo password on hosts %s is listed as confirmed, but HMAC does not verify.\n"%(uuid, hosts)
505 elif confirmedHosts != hosts:
506 result = result + "Entry %s hostlist mismatch (%s vs. %s).\n"%(uuid, hosts, confirmedHosts)
507 elif make_passwd_hmac('confirm-new-password', 'sudo', uid, uuid, hosts, cryptedpass) == confirmedHmac:
508 result = result + "Entry %s for sudo password on hosts %s now confirmed.\n"%(uuid, hosts)
509 status = 'confirmed:'+make_passwd_hmac('password-is-confirmed', 'sudo', uid, uuid, hosts, cryptedpass)
511 result = result + "Entry %s for sudo password on hosts %s HMAC verify failed.\n"%(uuid, hosts)
514 newentry = " ".join([uuid, status, hosts, cryptedpass])
515 if len(newldap) == 0:
516 newldap.append((ldap.MOD_REPLACE,"sudoPassword",newentry))
518 newldap.append((ldap.MOD_ADD,"sudoPassword",newentry))
520 for entry in SudoPasswd:
521 result = result + "Entry %s that you confirm is not listed in ldap."%(entry)
523 for entry in newldap:
528 # Handle an [almost] arbitary change
529 def HandleChange(Reply,DnRecord,Key):
531 Lines = re.split("\n *\r?",PlainText);
542 # Try to process a command line
543 Result = Result + "> "+Line+"\n";
549 badkeys = LoadBadSSH()
550 Res = DoPosition(Line,Attrs) or DoDNS(Line,Attrs,DnRecord) or \
551 DoArbChange(Line,Attrs) or DoSSH(Line,Attrs,badkeys,GetAttr(DnRecord,"uid")) or \
552 DoDel(Line,Attrs) or DoRBL(Line,Attrs) or DoConfirmSudopassword(Line)
555 Result = Result + "==> %s: %s\n" %(sys.exc_type,sys.exc_value);
557 # Fail, if someone tries to send someone elses signed email to the
558 # daemon then we want to abort ASAP.
561 Result = Result + "Command is not understood. Halted - no changes committed\n";
563 Result = Result + Res + "\n";
565 # Connect to the ldap server
567 F = open(PassDir+"/pass-"+pwd.getpwuid(os.getuid())[0],"r");
568 AccessPass = F.readline().strip().split(" ")
571 l.simple_bind_s("uid="+AccessPass[0]+","+BaseDn,AccessPass[1]);
572 oldAttrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+GetAttr(DnRecord,"uid"));
573 if ((GetAttr(oldAttrs[0],"userPassword").find("*LK*") != -1)
574 or GetAttr(oldAttrs[0],"userPassword").startswith("!")):
575 raise UDNotAllowedError, "This account is locked";
577 if CommitChanges == 1: # only if we are still good to go
579 Res = FinishConfirmSudopassword(l, GetAttr(DnRecord,"uid"), Attrs)
580 Result = Result + Res + "\n";
583 Result = Result + "FinishConfirmSudopassword raised an error (%s) - no changes committed\n"%(e);
586 if CommitChanges == 1:
587 Dn = "uid=" + GetAttr(DnRecord,"uid") + "," + BaseDn;
588 l.modify_s(Dn,Attrs);
592 Attrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+GetAttr(DnRecord,"uid"));
594 raise UDNotAllowedError, "User not found"
595 Attribs = GPGEncrypt(PrettyShow(Attrs[0])+"\n","0x"+Key[1],Key[4]);
598 Subst["__FROM__"] = ChangeFrom;
599 Subst["__EMAIL__"] = EmailAddress(DnRecord);
600 Subst["__ADMIN__"] = ReplyTo;
601 Subst["__RESULT__"] = Result;
602 Subst["__ATTR__"] = Attribs;
604 return Reply + TemplateSubst(Subst,open(TemplatesDir+"change-reply","r").read());
606 # Handle ping handles an email sent to the 'ping' address (ie this program
607 # called with a ping argument) It replies with a dump of the public records.
608 def HandlePing(Reply,DnRecord,Key):
610 Subst["__FROM__"] = PingFrom;
611 Subst["__EMAIL__"] = EmailAddress(DnRecord);
612 Subst["__LDAPFIELDS__"] = PrettyShow(DnRecord);
613 Subst["__ADMIN__"] = ReplyTo;
615 return Reply + TemplateSubst(Subst,open(TemplatesDir+"ping-reply","r").read());
617 # Handle a change password email sent to the change password address
618 # (this program called with the chpass argument)
619 def HandleChPass(Reply,DnRecord,Key):
620 # Generate a random password
621 Password = GenPass();
622 Pass = HashPass(Password);
624 # Use GPG to encrypt it
625 Message = GPGEncrypt("Your new password is '" + Password + "'\n",\
630 raise UDFormatError, "Unable to generate the encrypted reply, gpg failed.";
633 Type = "Your message was encrypted using PGP 2.x\ncompatibility mode.";
635 Type = "Your message was encrypted using GPG (OpenPGP)\ncompatibility "\
636 "mode, without IDEA. This message cannot be decoded using PGP 2.x";
639 Subst["__FROM__"] = ChPassFrom;
640 Subst["__EMAIL__"] = EmailAddress(DnRecord);
641 Subst["__CRYPTTYPE__"] = Type;
642 Subst["__PASSWORD__"] = Message;
643 Subst["__ADMIN__"] = ReplyTo;
644 Reply = Reply + TemplateSubst(Subst,open(TemplatesDir+"passwd-changed","r").read());
646 # Connect to the ldap server
648 F = open(PassDir+"/pass-"+pwd.getpwuid(os.getuid())[0],"r");
649 AccessPass = F.readline().strip().split(" ")
651 l.simple_bind_s("uid="+AccessPass[0]+","+BaseDn,AccessPass[1]);
653 # Check for a locked account
654 Attrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+GetAttr(DnRecord,"uid"));
655 if (GetAttr(Attrs[0],"userPassword").find("*LK*") != -1) \
656 or GetAttr(Attrs[0],"userPassword").startswith("!"):
657 raise UDNotAllowedError, "This account is locked";
659 # Modify the password
660 Rec = [(ldap.MOD_REPLACE,"userPassword","{crypt}"+Pass),
661 (ldap.MOD_REPLACE,"shadowLastChange",str(int(time.time()/24/60/60)))];
662 Dn = "uid=" + GetAttr(DnRecord,"uid") + "," + BaseDn;
667 # Start of main program
669 # Drop messages from a mailer daemon.
670 if os.environ.has_key('SENDER') == 0 or len(os.environ['SENDER']) == 0:
673 ErrMsg = "Indeterminate Error";
674 ErrType = EX_TEMPFAIL;
676 # Startup the replay cache
677 ErrType = EX_TEMPFAIL;
678 ErrMsg = "Failed to initialize the replay cache:";
681 ErrType = EX_PERMFAIL;
682 ErrMsg = "Failed to understand the email or find a signature:";
683 Email = mimetools.Message(sys.stdin,0);
684 Msg = GetClearSig(Email);
686 ErrMsg = "Message is not PGP signed:"
687 if Msg[0].find("-----BEGIN PGP SIGNED MESSAGE-----") == -1 and \
688 Msg[0].find("-----BEGIN PGP MESSAGE-----") == -1:
689 raise UDFormatError, "No PGP signature";
691 # Check the signature
692 ErrMsg = "Unable to check the signature or the signature was invalid:";
693 Res = GPGCheckSig(Msg[0]);
696 raise UDFormatError, Res[0];
699 raise UDFormatError, "Null signature text";
701 # Extract the plain message text in the event of mime encoding
703 ErrMsg = "Problem stripping MIME headers from the decoded message"
706 Index = Res[3].index("\n\n") + 2;
708 Index = Res[3].index("\n\r\n") + 3;
709 PlainText = Res[3][Index:];
713 # Connect to the ldap server
714 ErrType = EX_TEMPFAIL;
715 ErrMsg = "An error occured while performing the LDAP lookup";
718 l.simple_bind_s("","");
720 # Search for the matching key fingerprint
721 Attrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"keyFingerPrint=" + Res[2][1]);
723 ErrType = EX_PERMFAIL;
725 raise UDFormatError, "Key not found"
727 raise UDFormatError, "Oddly your key fingerprint is assigned to more than one account.."
730 # Check the signature against the replay cache
731 RC = ReplayCache(ReplayCacheFile);
733 ErrMsg = "The replay cache rejected your message. Check your clock!";
734 Rply = RC.Check(Res[1]);
737 raise UDNotAllowedError, Rply;
741 # Determine the sender address
742 ErrMsg = "A problem occured while trying to formulate the reply";
743 Sender = Email.getheader("Reply-To");
745 Sender = Email.getheader("From");
747 raise UDFormatError, "Unable to determine the sender's address";
750 Date = time.strftime("%a, %d %b %Y %H:%M:%S +0000",time.gmtime(time.time()));
751 Reply = "To: %s\nReply-To: %s\nDate: %s\n" % (Sender,ReplyTo,Date);
754 if sys.argv[1] == "ping":
755 Reply = HandlePing(Reply,Attrs[0],Res[2]);
756 elif sys.argv[1] == "chpass":
757 if PlainText.strip().find("Please change my Debian password") != 0:
758 raise UDFormatError,"Please send a signed message where the first line of text is the string 'Please change my Debian password'";
759 Reply = HandleChPass(Reply,Attrs[0],Res[2]);
760 elif sys.argv[1] == "change":
761 Reply = HandleChange(Reply,Attrs[0],Res[2]);
764 raise UDFormatError, "Incorrect Invokation";
766 # Send the message through sendmail
767 ErrMsg = "A problem occured while trying to send the reply";
768 Child = os.popen("/usr/sbin/sendmail -t","w");
769 # Child = os.popen("cat","w");
771 if Child.close() != None:
772 raise UDExecuteError, "Sendmail gave a non-zero return code";
776 Date = time.strftime("%a, %d %b %Y %H:%M:%S +0000",time.gmtime(time.time()));
777 ErrReplyHead = "To: %s\nReply-To: %s\nDate: %s\n" % (os.environ['SENDER'],ReplyTo,Date);
781 Subst["__ERROR__"] = ErrMsg;
782 Subst["__ADMIN__"] = ReplyTo;
784 Trace = "==> %s: %s\n" %(sys.exc_type,sys.exc_value);
785 List = traceback.extract_tb(sys.exc_traceback);
787 Trace = Trace + "Python Stack Trace:\n";
789 Trace = Trace + " %s %s:%u: %s\n" %(x[2],x[0],x[1],x[3]);
791 Subst["__TRACE__"] = Trace;
793 # Try to send the bounce
795 ErrReply = TemplateSubst(Subst,open(TemplatesDir+"error-reply","r").read());
797 Child = os.popen("/usr/sbin/sendmail -t -oi -f ''","w");
798 Child.write(ErrReplyHead);
799 Child.write(ErrReply);
800 if Child.close() != None:
801 raise UDExecuteError, "Sendmail gave a non-zero return code";
803 sys.exit(EX_TEMPFAIL);
805 if ErrType != EX_PERMFAIL:
811 # vim:set shiftwidth=3: