+ # And now break and stop processing input, which sends a reply to the user.
+ raise UDFormatError, "Submitted SSH Key known to be bad and insecure, processing halted, NOTHING MODIFIED AT ALL"
+
+ global SeenKey;
+ if SeenKey:
+ Attrs.append((ldap.MOD_ADD,"sshRSAAuthKey",Str));
+ return "SSH Key added: %s %s [%s]"%(key_size, fingerprint, FormatSSHAuth(Str))
+
+ Attrs.append((ldap.MOD_REPLACE,"sshRSAAuthKey",Str));
+ SeenKey = 1;
+ return "SSH Keys replaced with: %s %s [%s]"%(key_size, fingerprint, FormatSSHAuth(Str))
+
+# Handle changing a dns entry
+# host IN A 12.12.12.12
+# host IN AAAA 1234::5678
+# host IN CNAME foo.bar. <- Trailing dot is required
+# host IN MX foo.bar. <- Trailing dot is required
+def DoDNS(Str,Attrs,DnRecord):
+ cnamerecord = re.match("^[-\w]+\s+IN\s+CNAME\s+([-\w.]+\.)$",Str,re.IGNORECASE)
+ arecord = re.match('^[-\w]+\s+IN\s+A\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$',Str,re.IGNORECASE)
+ mxrecord = re.match("^[-\w]+\s+IN\s+MX\s+(\d{1,3})\s+([-\w.]+\.)$",Str,re.IGNORECASE)
+ txtrecord = re.match("^[-\w]+\s+IN\s+TXT\s+([-\d. a-z\t<>@:]+)", Str, re.IGNORECASE)
+ #aaaarecord = re.match('^[-\w]+\s+IN\s+AAAA\s+((?:[0-9a-f]{1,4})(?::[0-9a-f]{1,4})*(?::(?:(?::[0-9a-f]{1,4})*|:))?)$',Str,re.IGNORECASE)
+ aaaarecord = re.match('^[-\w]+\s+IN\s+AAAA\s+([A-F0-9:]{2,39})$',Str,re.IGNORECASE)
+
+ if cnamerecord is None and\
+ arecord is None and\
+ mxrecord is None and\
+ txtrecord is None and\
+ aaaarecord is None:
+ return None;
+
+ # Check if the name is already taken
+ G = re.match('^([-\w+]+)\s',Str)
+ if G is None:
+ raise UDFormatError, "Hostname not found although we already passed record syntax checks"
+ hostname = G.group(1)
+
+ # Check for collisions
+ global l;
+ # [JT 20070409 - search for both tab and space suffixed hostnames
+ # since we accept either. It'd probably be better to parse the
+ # incoming string in order to construct what we feed LDAP rather
+ # than just passing it through as is.]
+ filter = "(|(dnsZoneEntry=%s *)(dnsZoneEntry=%s *))" % (hostname, hostname)
+ Rec = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,filter,["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 cnamerecord:
+ if DNS.has_key(hostname):
+ return "CNAME and other RR types not allowed: "+Str
+ else:
+ DNS[hostname] = 2
+ else:
+ if DNS.has_key(hostname) and DNS[hostname] == 2:
+ return "CNAME and other RR types not allowed: "+Str
+ else:
+ DNS[hostname] = 1
+
+ if cnamerecord is not None:
+ sanitized = "%s IN CNAME %s" % (hostname, cnamerecord.group(1))
+ elif txtrecord is not None:
+ sanitized = "%s IN TXT %s" % (hostname, txtrecord.group(1))
+ elif arecord is not None:
+ ipaddress = arecord.group(1)
+ for quad in ipaddress.split('.'):
+ if not (int(quad) >=0 and int(quad) <= 255):
+ return "Invalid quad %s in IP address %s in line %s" %(quad, ipaddress, Str)
+ sanitized = "%s IN A %s"% (hostname, ipaddress)
+ elif mxrecord is not None:
+ priority = mxrecord.group(1)
+ mx = mxrecord.group(2)
+ sanitized = "%s IN MX %s %s" % (hostname, priority, mx)
+ elif aaaarecord is not None:
+ ipv6address = aaaarecord.group(1)
+ parts = ipv6address.split(':')
+ if len(parts) > 8:
+ return "Invalid IPv6 address (%s): too many parts"%(ipv6address)
+ if len(parts) <= 2:
+ return "Invalid IPv6 address (%s): too few parts"%(ipv6address)
+ if parts[0] == "":
+ parts.pop(0)
+ if parts[-1] == "":
+ parts.pop(-1)
+ seenEmptypart = False
+ for p in parts:
+ if len(p) > 4:
+ return "Invalid IPv6 address (%s): part %s is longer than 4 characters"%(ipv6address, p)
+ if p == "":
+ if seenEmptypart:
+ return "Invalid IPv6 address (%s): more than one :: (nothing in between colons) is not allowed"%(ipv6address)
+ seenEmptypart = True
+ sanitized = "%s IN AAAA %s" % (hostname, ipv6address)
+ else:
+ raise UDFormatError, "None of the types I recognize was it. I shouldn't be here. confused."
+
+ if SeenDNS:
+ Attrs.append((ldap.MOD_ADD,"dnsZoneEntry",sanitized));
+ return "DNS Entry added "+sanitized;
+
+ Attrs.append((ldap.MOD_REPLACE,"dnsZoneEntry",sanitized));
+ SeenDNS = 1;
+ return "DNS Entry replaced with "+sanitized;
+
+# Handle an RBL list (mailRBL, mailRHSBL, mailWhitelist)
+def DoRBL(Str,Attrs):
+ Match = re.compile('^mail(rbl|rhsbl|whitelist) ([-a-z0-9.]+)$').match(Str.lower())
+ if Match == None:
+ return None
+
+ if Match.group(1) == "rbl":
+ Key = "mailRBL"
+ if Match.group(1) == "rhsbl":
+ Key = "mailRHSBL"
+ if Match.group(1) == "whitelist":
+ Key = "mailWhitelist"
+ Host = Match.group(2)
+
+ global SeenList
+ if SeenList.has_key(Key):
+ Attrs.append((ldap.MOD_ADD,Key,Host))
+ return "%s added %s" % (Key,Host)
+
+ Attrs.append((ldap.MOD_REPLACE,Key,Host))
+ SeenList[Key] = 1;
+ return "%s replaced with %s" % (Key,Host)
+
+# Handle a ConfirmSudoPassword request
+def DoConfirmSudopassword(Str, SudoPasswd):
+ Match = re.compile('^confirm sudopassword ('+UUID_FORMAT+') ([a-z0-9.,*-]+) ([0-9a-f]{40})$').match(Str)
+ if Match == None:
+ return None
+
+ uuid = Match.group(1)
+ hosts = Match.group(2)
+ hmac = Match.group(3)
+
+ SudoPasswd[uuid] = (hosts, hmac)
+ return "got confirm for sudo password %s on host(s) %s, auth code %s" % (uuid,hosts, hmac)
+
+def FinishConfirmSudopassword(l, uid, Attrs, SudoPasswd):
+ result = "\n"
+
+ if len(SudoPasswd) == 0:
+ return None
+
+ res = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+uid, ['sudoPassword']);
+ if len(res) != 1:
+ raise UDFormatError, "Not exactly one hit when searching for user"
+ if res[0][1].has_key('sudoPassword'):
+ inldap = res[0][1]['sudoPassword']
+ else:
+ inldap = []
+
+ newldap = []
+ for entry in inldap:
+ Match = re.compile('^('+UUID_FORMAT+') (confirmed:[0-9a-f]{40}|unconfirmed) ([a-z0-9.,*-]+) ([^ ]+)$').match(entry)
+ if Match == None:
+ raise UDFormatError, "Could not parse existing sudopasswd entry"
+ uuid = Match.group(1)
+ status = Match.group(2)
+ hosts = Match.group(3)
+ cryptedpass = Match.group(4)
+
+ if SudoPasswd.has_key(uuid):
+ confirmedHosts = SudoPasswd[uuid][0]
+ confirmedHmac = SudoPasswd[uuid][1]
+ if status.startswith('confirmed:'):
+ if status == 'confirmed:'+make_passwd_hmac('password-is-confirmed', 'sudo', uid, uuid, hosts, cryptedpass):
+ result = result + "Entry %s for sudo password on hosts %s already confirmed.\n"%(uuid, hosts)
+ else:
+ result = result + "Entry %s for sudo password on hosts %s is listed as confirmed, but HMAC does not verify.\n"%(uuid, hosts)
+ elif confirmedHosts != hosts:
+ result = result + "Entry %s hostlist mismatch (%s vs. %s).\n"%(uuid, hosts, confirmedHosts)
+ elif make_passwd_hmac('confirm-new-password', 'sudo', uid, uuid, hosts, cryptedpass) == confirmedHmac:
+ result = result + "Entry %s for sudo password on hosts %s now confirmed.\n"%(uuid, hosts)
+ status = 'confirmed:'+make_passwd_hmac('password-is-confirmed', 'sudo', uid, uuid, hosts, cryptedpass)
+ else:
+ result = result + "Entry %s for sudo password on hosts %s HMAC verify failed.\n"%(uuid, hosts)
+ del SudoPasswd[uuid]
+
+ newentry = " ".join([uuid, status, hosts, cryptedpass])
+ if len(newldap) == 0:
+ newldap.append((ldap.MOD_REPLACE,"sudoPassword",newentry))
+ else:
+ newldap.append((ldap.MOD_ADD,"sudoPassword",newentry))
+
+ for entry in SudoPasswd:
+ result = result + "Entry %s that you confirm is not listed in ldap."%(entry)
+
+ for entry in newldap:
+ Attrs.append(entry)
+
+ return result
+
+def connect_to_ldap_and_check_if_locked(DnRecord):
+ # Connect to the ldap server
+ l = connectLDAP()
+ F = open(PassDir+"/pass-"+pwd.getpwuid(os.getuid())[0],"r");
+ AccessPass = F.readline().strip().split(" ")
+ 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 (GetAttr(Attrs[0],"userPassword").find("*LK*") != -1) \
+ or GetAttr(Attrs[0],"userPassword").startswith("!"):
+ raise UDNotAllowedError, "This account is locked";
+
+ return l
+
+# Handle an [almost] arbitary change
+def HandleChange(Reply,DnRecord,Key):
+ global PlainText;
+ Lines = re.split("\n *\r?",PlainText);
+
+ Result = "";
+ Attrs = [];
+ SudoPasswd = {}
+ Show = 0;
+ CommitChanges = 1
+ for Line in Lines:
+ Line = Line.strip()
+ if Line == "":
+ continue;
+
+ # Try to process a command line
+ Result = Result + "> "+Line+"\n";
+ try:
+ if Line == "show":
+ Show = 1;
+ Res = "OK";
+ else:
+ badkeys = LoadBadSSH()
+ Res = DoPosition(Line,Attrs) or DoDNS(Line,Attrs,DnRecord) or \
+ DoArbChange(Line,Attrs) or DoSSH(Line,Attrs,badkeys,GetAttr(DnRecord,"uid")) or \
+ DoDel(Line,Attrs) or DoRBL(Line,Attrs) or DoConfirmSudopassword(Line, SudoPasswd)
+ except:
+ Res = None;
+ Result = Result + "==> %s: %s\n" %(sys.exc_type,sys.exc_value);
+
+ # Fail, if someone tries to send someone elses signed email to the
+ # daemon then we want to abort ASAP.
+ if Res == None:
+ CommitChanges = 0
+ Result = Result + "Command is not understood. Halted - no changes committed\n";
+ break;
+ Result = Result + Res + "\n";
+
+ # Connect to the ldap server
+ l = connect_to_ldap_and_check_if_locked(DnRecord)
+
+ if CommitChanges == 1 and len(SudoPasswd) > 0: # only if we are still good to go
+ try:
+ Res = FinishConfirmSudopassword(l, GetAttr(DnRecord,"uid"), Attrs, SudoPasswd)
+ if not Res is None:
+ Result = Result + Res + "\n";
+ except Error, e:
+ CommitChanges = 0
+ Result = Result + "FinishConfirmSudopassword raised an error (%s) - no changes committed\n"%(e);
+
+ if CommitChanges == 1 and len(Attrs) > 0:
+ Dn = "uid=" + GetAttr(DnRecord,"uid") + "," + BaseDn;
+ l.modify_s(Dn,Attrs);
+
+ Attribs = "";
+ if Show == 1:
+ Attrs = l.search_s(BaseDn,ldap.SCOPE_ONELEVEL,"uid="+GetAttr(DnRecord,"uid"));
+ if len(Attrs) == 0:
+ raise UDNotAllowedError, "User not found"
+ Attribs = GPGEncrypt(PrettyShow(Attrs[0])+"\n","0x"+Key[1],Key[4]);
+
+ Subst = {};
+ Subst["__FROM__"] = ChangeFrom;
+ Subst["__EMAIL__"] = EmailAddress(DnRecord);
+ Subst["__ADMIN__"] = ReplyTo;
+ Subst["__RESULT__"] = Result;
+ Subst["__ATTR__"] = Attribs;
+
+ return Reply + TemplateSubst(Subst,open(TemplatesDir+"change-reply","r").read());
+