#!/usr/bin/env python
# -*- mode: python -*-
-import userdir_gpg, userdir_ldap, sys, traceback, time, ldap, os;
-import pwd
-from userdir_gpg import *;
-from userdir_ldap import *;
+
+# Prior copyright probably rmurray, troup, joey, jgg -- weasel 2008
+# Copyright (c) 2008 Peter Palfrader <peter@palfrader.org>
+# Copyright (c) 2008 Joerg Jaspert <joerg@debian.org>
+
+import userdir_gpg, userdir_ldap, sys, traceback, time, ldap, os, commands
+import pwd, tempfile
+from userdir_gpg import *
+from userdir_ldap import *
# Error codes from /usr/include/sysexits.h
ReplyTo = ConfModule.replyto;
ChPassFrom = ConfModule.chpassfrom;
ChangeFrom = ConfModule.changefrom;
ReplayCacheFile = ConfModule.replaycachefile;
+SSHFingerprintFile = ConfModule.fingerprintfile
EX_TEMPFAIL = 75;
EX_PERMFAIL = 65; # EX_DATAERR
SeenList = {}
DNS = {}
+SSHFingerprint = re.compile('^(\d+) ([0-9a-f\:]{47}) (.+)$')
+SSHRSA1Match = re.compile('^^(.* )?\d+ \d+ \d+')
+
ArbChanges = {"c": "..",
"l": ".*",
"facsimileTelephoneNumber": ".*",
"mailDisableMessage": ".*",
"mailGreylisting": "^(TRUE|FALSE)$",
"mailCallout": "^(TRUE|FALSE)$",
+ "VoIP": ".*",
};
DelItems = {"c": None,
"mailRHSBL": None,
"mailWhitelist": None,
"mailDisableMessage": None,
+ "VoIP": None,
};
# Decode a GPS location from some common forms
Attrs.append((ldap.MOD_REPLACE,"longitude",sLong));
return "Position set to %s/%s (%s/%s decimal degrees)"%(sLat,sLong,Lat,Long);
+# Load bad ssh fingerprints
+def LoadBadSSH():
+ f = open(SSHFingerprintFile, "r")
+ bad = []
+ FingerprintLine = re.compile('^([0-9a-f\:]{47}).*$')
+ for line in f.readlines():
+ Match = FingerprintLine.match(line)
+ if Match is not None:
+ g = Match.groups()
+ bad.append(g[0])
+ return bad
+
# Handle an SSH authentication key, the line format is:
# [options] 1024 35 13188913666680[..] [comment]
-def DoSSH(Str,Attrs):
+def DoSSH(Str, Attrs, badkeys, uid):
Match = SSH2AuthSplit.match(Str);
if Match == None:
- Match = re.compile('^1024 (\d+) ').match(Str)
+ return None;
+ g = Match.groups()
+ typekey = g[1]
+ if Match == None:
+ Match = SSHRSA1Match.match(Str)
if Match is not None:
- return "SSH1 keys not supported anymore"
+ return "RSA1 keys not supported anymore"
return None;
-
+
+ (fd, path) = tempfile.mkstemp(".pub", "sshkeytry", "/tmp")
+ f = open(path, "w")
+ f.write("%s\n" % (Str))
+ f.close()
+ cmd = "/usr/bin/ssh-keygen -l -f %s < /dev/null" % (path)
+ (result, output) = commands.getstatusoutput(cmd)
+ os.remove(path)
+ if (result != 0):
+ raise Error, "ssh-keygen -l invocation failed!\n%s\n" % (output)
+
+
+ # Head
+ Date = time.strftime("%a, %d %b %Y %H:%M:%S +0000",time.gmtime(time.time()))
+ ErrReplyHead = "From: %s\nCc: %s\nReply-To: %s\nDate: %s\n" % (os.environ['SENDER'],os.environ['SENDER'],ReplyTo,Date)
+ Subst = {}
+ Subst["__ADMIN__"] = ReplyTo
+ Subst["__USER__"] = uid
+
+ Match = SSHFingerprint.match(output)
+ g = Match.groups()
+
+ if int(g[0]) < 1024:
+ try:
+ # Body
+ Subst["__ERROR__"] = "SSH keysize %s is below limit 1024" % (g[0])
+ ErrReply = TemplateSubst(Subst,open(TemplatesDir+"admin-info","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)
+
+ # And now break and stop processing input, which sends a reply to the user.
+ raise Error, "SSH keys must have at least 1024 bits, processing halted, NOTHING MODIFIED AT ALL"
+ elif g[1] in badkeys:
+ try:
+ # Body
+ Subst["__ERROR__"] = "SSH key with fingerprint %s known as bad key" % (g[1])
+ ErrReply = TemplateSubst(Subst,open(TemplatesDir+"admin-info","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)
+
+ # And now break and stop processing input, which sends a reply to the user.
+ raise Error, "Submitted SSH Key known to be bad and insecure, processing halted, NOTHING MODIFIED AT ALL"
+
+ if (typekey == "dss"):
+ return "DSA keys not accepted anymore"
+
global SeenKey;
if SeenKey:
Attrs.append((ldap.MOD_ADD,"sshRSAAuthKey",Str));
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
+# 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):
- 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.]+\.$",Str,re.IGNORECASE) == None:
- return None;
+ cnamerecord = re.match("^[-\w]+\s+IN\s+CNAME\s+([-\w.]+\.)$",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)
+ #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 == None and\
+ arecord == None and\
+ mxrecord == None and\
+ aaaarecord == None:
+ return None;
# Check if the name is already taken
- G = re.match('^([-\w+]+)\s',Str).groups();
+ G = re.match('^([-\w+]+)\s',Str)
+ if G == None:
+ raise Error, "Hostname not found although we already passed record syntax checks"
+ hostname = G.group(1)
# Check for collisions
global l;
# 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 *))" % (G[0], G[0])
+ 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"):
global SeenDNS;
global DNS;
- if cname:
- if DNS.has_key(G[0]):
+ if cnamerecord:
+ if DNS.has_key(hostname):
return "CNAME and other RR types not allowed: "+Str
else:
- DNS[G[0]] = 2
+ DNS[hostname] = 2
else:
- if DNS.has_key(G[0]) and DNS[G[0]] == 2:
+ if DNS.has_key(hostname) and DNS[hostname] == 2:
return "CNAME and other RR types not allowed: "+Str
else:
- DNS[G[0]] = 1
-
+ DNS[hostname] = 1
+
+ if cnamerecord != None:
+ sanitized = "%s IN CNAME %s" % (hostname, cnamerecord.group(1))
+ elif arecord != 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 != None:
+ priority = mxrecord.group(1)
+ mx = mxrecord.group(2)
+ sanitized = "%s IN MX %s %s" % (hostname, priority, mx)
+ elif aaaarecord != 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 Error, "None of the types I recognize was it. I shouldn't be here. confused."
+
if SeenDNS:
- Attrs.append((ldap.MOD_ADD,"dnsZoneEntry",Str));
- return "DNS Entry added "+Str;
-
- Attrs.append((ldap.MOD_REPLACE,"dnsZoneEntry",Str));
+ 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 "+Str;
+ return "DNS Entry replaced with "+sanitized;
# Handle an RBL list (mailRBL, mailRHSBL, mailWhitelist)
def DoRBL(Str,Attrs):
Result = Result + "> "+Line+"\n";
try:
if Line == "show":
- Show = 1;
- Res = "OK";
+ Show = 1;
+ Res = "OK";
else:
- Res = DoPosition(Line,Attrs) or DoDNS(Line,Attrs,DnRecord) or \
- DoArbChange(Line,Attrs) or DoSSH(Line,Attrs) or \
- DoDel(Line,Attrs) or DoRBL(Line,Attrs);
+ 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)
except:
Res = None;
Result = Result + "==> %s: %s\n" %(sys.exc_type,sys.exc_value);
Result = Result + Res + "\n";
# Connect to the ldap server
- l = ldap.open(LDAPServer);
+ l = connectLDAP()
F = open(PassDir+"/pass-"+pwd.getpwuid(os.getuid())[0],"r");
AccessPass = F.readline().strip().split(" ")
F.close();
Reply = Reply + TemplateSubst(Subst,open(TemplatesDir+"passwd-changed","r").read());
# Connect to the ldap server
- l = ldap.open(LDAPServer);
+ l = connectLDAP()
F = open(PassDir+"/pass-"+pwd.getpwuid(os.getuid())[0],"r");
AccessPass = F.readline().strip().split(" ")
F.close();
raise Error, "This account is locked";
# Modify the password
- Rec = [(ldap.MOD_REPLACE,"userPassword","{crypt}"+Pass)];
+ Rec = [(ldap.MOD_REPLACE,"userPassword","{crypt}"+Pass),
+ (ldap.MOD_REPLACE,"shadowLastChange",str(int(time.time()/24/60/60)))];
Dn = "uid=" + GetAttr(DnRecord,"uid") + "," + BaseDn;
l.modify_s(Dn,Rec);
ErrType = EX_TEMPFAIL;
ErrMsg = "An error occured while performing the LDAP lookup";
global l;
- l = ldap.open(LDAPServer);
+ l = connectLDAP()
l.simple_bind_s("","");
# Search for the matching key fingerprint
projects / mirror / userdir-ldap.git / blobdiff