#!/usr/bin/env python
# -*- mode: python -*-
-import userdir_gpg, userdir_ldap, sys, traceback, time, ldap, posix;
+import userdir_gpg, userdir_ldap, sys, traceback, time, ldap, os;
import string, pwd
from userdir_gpg import *;
from userdir_ldap import *;
EX_TEMPFAIL = 75;
EX_PERMFAIL = 65; # EX_DATAERR
Error = 'Message Error';
-SeenRSA = 0;
+SeenKey = 0;
SeenDNS = 0;
+DNS = {}
ArbChanges = {"c": "..",
"l": ".*",
- "facsimiletelephonenumber": ".*",
- "telephonenumber": ".*",
- "postaladdress": ".*",
- "postalcode": ".*",
- "loginshell": ".*",
- "emailforward": "^([^<>@]+@.+)?$",
- "ircnick": ".*",
- "onvacation": ".*",
- "labeledurl": ".*"};
+ "facsimileTelephoneNumber": ".*",
+ "telephoneNumber": ".*",
+ "postalAddress": ".*",
+ "postalCode": ".*",
+ "loginShell": ".*",
+ "emailForward": "^([^<>@]+@.+)?$",
+ "ircNick": ".*",
+ "icqUin": "^[0-9]*$",
+ "onVacation": ".*",
+ "labledURI": ".*"};
+
+DelItems = {"c": None,
+ "l": None,
+ "facsimileTelephoneNumber": None,
+ "telephoneNumber": None,
+ "postalAddress": None,
+ "postalCode": None,
+ "emailForward": None,
+ "ircNick": None,
+ "onVacation": None,
+ "labledURI": None,
+ "latitude": None,
+ "longitude": None,
+ "icqUin": None,
+ "sshRSAAuthKey": None,
+ "sshDSAAuthKey": None};
# Decode a GPS location from some common forms
def LocDecode(Str,Dir):
if Match == None:
return None;
G = Match.groups();
-
- if ArbChanges.has_key(G[0]) == 0:
+
+ attrName = G[0].lower();
+ for i in ArbChanges.keys():
+ if i.lower() == attrName:
+ attrName = i;
+ break;
+ if ArbChanges.has_key(attrName) == 0:
return None;
-
- if re.match(ArbChanges[G[0]],G[1]) == None:
- raise Error, "Item does not match the required format"+ArbChanges[G[0]];
- Attrs.append((ldap.MOD_REPLACE,G[0],G[1]));
- return "Changed entry %s to %s"%(G[0],G[1]);
+ if re.match(ArbChanges[attrName],G[1]) == None:
+ raise Error, "Item does not match the required format"+ArbChanges[attrName];
+
+ Attrs.append((ldap.MOD_REPLACE,attrName,G[1]));
+ return "Changed entry %s to %s"%(attrName,G[1]);
+
+# Handle changing a set of arbitary fields
+# <field>: value
+def DoDel(Str,Attrs):
+ Match = re.match("^del (.*)$",Str);
+ if Match == None:
+ return None;
+ G = Match.groups();
+
+ attrName = G[0].lower();
+ for i in DelItems.keys():
+ if i.lower() == attrName:
+ attrName = i;
+ break;
+ if DelItems.has_key(attrName) == 0:
+ return "Cannot erase entry %s"%(attrName);
+
+ Attrs.append((ldap.MOD_DELETE,attrName,None));
+ return "Removed entry %s"%(attrName);
# Handle a position change message, the line format is:
# Lat: -12412.23 Long: +12341.2342
Attrs.append((ldap.MOD_REPLACE,"longitude",sLong));
return "Position set to %s/%s (%s/%s decimal degrees)"%(sLat,sLong,Lat,Long);
-# Handle a SSH RSA authentication key, the line format is:
+# Handle an SSH authentication key, the line format is:
# [options] 1024 35 13188913666680[..] [comment]
def DoSSH(Str,Attrs):
- Match = SSHAuthSplit.match(Str);
+ Match = SSH2AuthSplit.match(Str);
if Match == None:
return None;
- global SeenRSA;
- if SeenRSA:
- Attrs.append((ldap.MOD_ADD,"sshrsaauthkey",Str));
+ global SeenKey;
+ if SeenKey:
+ Attrs.append((ldap.MOD_ADD,"sshRSAAuthKey",Str));
return "SSH Key added "+FormatSSHAuth(Str);
- Attrs.append((ldap.MOD_REPLACE,"sshrsaauthkey",Str));
- SeenRSA = 1;
+ Attrs.append((ldap.MOD_REPLACE,"sshRSAAuthKey",Str));
+ SeenKey = 1;
return "SSH Keys replaced with "+FormatSSHAuth(Str);
# Handle changing a dns entry
# host in a 12.12.12.12
# host in cname foo.bar. <- Trailing dot is required
def DoDNS(Str,Attrs,DnRecord):
- if re.match('^[\w-]+\s+in\s+a\s+\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$',\
- Str,re.IGNORECASE) == None and \
- re.match("^[\w-]+\s+in\s+cname\s+[\w.\-]+\.$",Str,re.IGNORECASE) == None:
+ cname = re.match("^[-\w]+\s+in\s+cname\s+[-\w.]+\.$",Str,re.IGNORECASE);
+ if re.match('^[-\w]+\s+in\s+a\s+\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$',\
+ Str,re.IGNORECASE) == None and cname == None and \
+ re.match("^[-\w]+\s+in\s+mx\s+\d{1,3}\s+[-\w.]+\.$",Str,re.IGNORECASE) == None:
return None;
# Check if the name is already taken
- G = re.match('^([\w-+]+)\s',Str).groups();
+ G = re.match('^([-\w+]+)\s',Str).groups();
# Check for collisions
global l;
- Rec = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"dnszoneentry="+G[0]+" *",["uid"]);
+ Rec = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"dnsZoneEntry="+G[0]+" *",["uid"]);
for x in Rec:
if GetAttr(x,"uid") != GetAttr(DnRecord,"uid"):
return "DNS entry is already owned by " + GetAttr(x,"uid")
global SeenDNS;
+ global DNS;
+
+ if cname:
+ if DNS.has_key(G[0]):
+ return "CNAME and other RR types not allowed: "+Str
+ else:
+ DNS[G[0]] = 2
+ else:
+ if DNS.has_key(G[0]) and DNS[G[0]] == 2:
+ return "CNAME and other RR types not allowed: "+Str
+ else:
+ DNS[G[0]] = 1
+
if SeenDNS:
- Attrs.append((ldap.MOD_ADD,"dnszoneentry",Str));
+ Attrs.append((ldap.MOD_ADD,"dnsZoneEntry",Str));
return "DNS Entry added "+Str;
- Attrs.append((ldap.MOD_REPLACE,"dnszoneentry",Str));
+ Attrs.append((ldap.MOD_REPLACE,"dnsZoneEntry",Str));
SeenDNS = 1;
return "DNS Entry replaced with "+Str;
# Handle an [almost] arbitary change
def HandleChange(Reply,DnRecord,Key):
global PlainText;
- Lines = string.split(PlainText,"\r\n");
+ Lines = re.split("\n *\r?",PlainText);
Result = "";
Attrs = [];
+ Show = 0;
for Line in Lines:
Line = string.strip(Line);
if Line == "":
# Try to process a command line
Result = Result + "> "+Line+"\n";
- Show = 0;
try:
if Line == "show":
Show = 1;
Res = "OK";
else:
- Res = DoPosition(Line,Attrs) or DoSSH(Line,Attrs) or \
- DoDNS(Line,Attrs,DnRecord) or DoArbChange(Line,Attrs);
+ Res = DoPosition(Line,Attrs) or DoDNS(Line,Attrs,DnRecord) or \
+ DoArbChange(Line,Attrs) or DoSSH(Line,Attrs) or \
+ DoDel(Line,Attrs);
except:
Res = None;
Result = Result + "==> %s: %s\n" %(sys.exc_type,sys.exc_value);
# Connect to the ldap server
l = ldap.open(LDAPServer);
- F = open(PassDir+"/pass-"+pwd.getpwuid(posix.getuid())[0],"r");
+ F = open(PassDir+"/pass-"+pwd.getpwuid(os.getuid())[0],"r");
AccessPass = string.split(string.strip(F.readline())," ");
F.close();
# Modify the record
l.simple_bind_s("uid="+AccessPass[0]+","+BaseDn,AccessPass[1]);
+ oldAttrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+GetAttr(DnRecord,"uid"));
+ if (string.find(GetAttr(oldAttrs[0],"userPassword"),"*LK*") != -1):
+ raise Error, "This account is locked";
Dn = "uid=" + GetAttr(DnRecord,"uid") + "," + BaseDn;
l.modify_s(Dn,Attrs);
# Connect to the ldap server
l = ldap.open(LDAPServer);
- F = open(PassDir+"/pass-"+pwd.getpwuid(posix.getuid())[0],"r");
+ F = open(PassDir+"/pass-"+pwd.getpwuid(os.getuid())[0],"r");
AccessPass = string.split(string.strip(F.readline())," ");
F.close();
+ l.simple_bind_s("uid="+AccessPass[0]+","+BaseDn,AccessPass[1]);
+
+ # Check for a locked account
+ Attrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+GetAttr(DnRecord,"uid"));
+ if (string.find(GetAttr(Attrs[0],"userPassword"),"*LK*") != -1):
+ raise Error, "This account is locked";
# Modify the password
- l.simple_bind_s("uid="+AccessPass[0]+","+BaseDn,AccessPass[1]);
Rec = [(ldap.MOD_REPLACE,"userPassword","{crypt}"+Pass)];
Dn = "uid=" + GetAttr(DnRecord,"uid") + "," + BaseDn;
l.modify_s(Dn,Rec);
return Reply;
# Start of main program
+
+# Drop messages from a mailer daemon.
+if os.environ.has_key('SENDER') == 0 or len(os.environ['SENDER']) == 0:
+ sys.exit(0);
+
ErrMsg = "Indeterminate Error";
ErrType = EX_TEMPFAIL;
try:
Email = mimetools.Message(sys.stdin,0);
Msg = GetClearSig(Email);
- # Check the signature
+ ErrMsg = "Message is not PGP signed:"
+ if string.find(Msg[0],"-----BEGIN PGP SIGNED MESSAGE-----") == -1 and \
+ string.find(Msg[0],"-----BEGIN PGP MESSAGE-----") == -1:
+ raise Error, "No PGP signature";
+
+ # Check the signature
ErrMsg = "Unable to check the signature or the signature was invalid:";
Res = GPGCheckSig(Msg[0]);
Rply = RC.Check(Res[1]);
if Rply != None:
raise Error, Rply;
- RC.Add(Res[1]);
# Connect to the ldap server
ErrType = EX_TEMPFAIL;
l.simple_bind_s("","");
# Search for the matching key fingerprint
- Attrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"keyfingerprint=" + Res[2][1]);
+ Attrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"keyFingerPrint=" + Res[2][1]);
+
+ ErrType = EX_PERMFAIL;
if len(Attrs) == 0:
raise Error, "Key not found"
if len(Attrs) != 1:
raise Error, "Oddly your key fingerprint is assigned to more than one account.."
+ RC.Add(Res[1]);
+
# Determine the sender address
- ErrType = EX_PERMFAIL;
ErrMsg = "A problem occured while trying to formulate the reply";
Sender = Email.getheader("Reply-To");
if Sender == None:
# Send the message through sendmail
ErrMsg = "A problem occured while trying to send the reply";
- Child = posix.popen("/usr/sbin/sendmail -t","w");
-# Child = posix.popen("cat","w");
+ Child = os.popen("/usr/sbin/sendmail -t","w");
+# Child = os.popen("cat","w");
Child.write(Reply);
if Child.close() != None:
raise Error, "Sendmail gave a non-zero return code";
except:
- print ErrMsg;
- print "==> %s: %s" %(sys.exc_type,sys.exc_value);
+ # Error Reply Header
+ Date = time.strftime("%a, %d %b %Y %H:%M:%S +0000",time.gmtime(time.time()));
+ ErrReplyHead = "To: %s\nReply-To: %s\nDate: %s\n" % (os.environ['SENDER'],ReplyTo,Date);
+
+ # Error Body
+ Subst = {};
+ Subst["__ERROR__"] = ErrMsg;
+ Subst["__ADMIN__"] = ReplyTo;
+
+ Trace = "==> %s: %s\n" %(sys.exc_type,sys.exc_value);
List = traceback.extract_tb(sys.exc_traceback);
if len(List) > 1:
- print "Trace: ";
+ Trace = Trace + "Python Stack Trace:\n";
for x in List:
- print " %s %s:%u: %s" %(x[2],x[0],x[1],x[3]);
- sys.exit(ErrType);
+ Trace = Trace + " %s %s:%u: %s\n" %(x[2],x[0],x[1],x[3]);
+
+ Subst["__TRACE__"] = Trace;
+
+ # Try to send the bounce
+ try:
+ ErrReply = TemplateSubst(Subst,open(TemplatesDir+"error-reply","r").read());
+
+ Child = os.popen("/usr/sbin/sendmail -t","w");
+ Child.write(ErrReplyHead);
+ Child.write(ErrReply);
+ if Child.close() != None:
+ raise Error, "Sendmail gave a non-zero return code";
+ except:
+ sys.exit(EX_TEMPFAIL);
+
+ if ErrType != EX_PERMFAIL:
+ sys.exit(ErrType);
+ sys.exit(0);